Measurement.fromnpy(): accept sensitivity as scalar or 0-dim numpy.ndarray

This reverts commit 17319c4925.

.drone.yml

@@ -1,110 +0,0 @@
-kind: pipeline
-type: docker
-name: archlinux
-
-clone:
-  depth: 50
-
-steps:
-  - name: archlinux_build
-    image: archlinux_build:latest
-    pull: if-not-exists
-    volumes:
-    - name: archlinux_ccache
-      path: /root/.ccache
-    commands:
-    # The following command is not required, we included this in the docker 
-    # image of archlinux_build
-    # - pacman -S --noconfirm ccache openblas fftw pulseaudio pybind11
-    - git submodule update --init --recursive
-    - cmake .
-    # More than two makes ascee2 irresponsive for now
-    - make -j2
-
-  - name: archlinux_test
-    image: archlinux_build:latest
-    pull: if-not-exists
-    commands:
-    # The following command is not required, we included this in the docker 
-    # image of archlinux_build
-    # - pacman -S --noconfirm openblas python-pytest fftw pulseaudio python-pip python-scipy python-h5py
-    - pip install -r requirements.txt
-    - pip install .
-    - pytest
-
-      #  - name: release-arch
-      #    commands:
-      #    -
-
-volumes:
-  - name: archlinux_ccache
-    host:
-      path: /tmp/archlinux_ccache
-
----
-kind: pipeline
-type: docker
-name: ubuntu
-
-clone:
-  depth: 3
-
-volumes:
-- name: archlinux_ccache
-  path: /root/.ccache
-
-steps:
-  - name: ubuntu_build
-    image: ubuntu_build:latest
-    pull: if-not-exists
-    volumes:
-    - name: ubuntu_ccache
-      path: /root/.ccache
-    commands:
-    # The following commands are not required, we included this in the docker 
-    # image of ubuntu_build
-    #- apt update
-    #- apt install -y git cmake python3-pybind11 libopenblas-dev python3-pip python3-scipy libusb-1.0-0-dev libpulse-dev python3-h5py fftw-dev
-    - git submodule update --init --recursive
-    - cmake .
-    # More than two makes ascee2 irresponsive for now
-    - make -j2
-
-  - name: ubuntu_test
-    image: ubuntu_build:latest
-    pull: if-not-exists
-    commands:
-    # The following commands are not required, we included this in the docker 
-    # image of ubuntu_build
-    #- apt update
-    #- apt install -y python3-pytest fftw pulseaudio python3-pip python3-scipy python3-h5py
-    - pip install -r requirements.txt
-    - pip install .
-    - pytest-3
-
-volumes:
-  - name: ubuntu_ccache
-    host:
-      path: /tmp/ubuntu_ccache
-
----
-kind: pipeline
-type: docker
-name: documentation_build
-
-clone:
-  depth: 3
-
-
-steps:
-  - name: build_docker_master
-    image: plugins/docker
-    settings:
-      repo: ascee/lasp_ascee_nl
-      tags: latest
-      username:
-        from_secret: docker_username
-      password:
-        from_secret: docker_password
-      when:
-        branch: master

.gitea/workflows/workflow.yml

@@ -0,0 +1,52 @@
+name: Building, testing and releasing LASP if it has a tag
+
+on:
+  - push
+
+jobs:
+  Build-Test-Ubuntu:
+    runs-on: ubuntu-latest
+    container: 
+      image: ascee/ubuntu_build:latest
+      volumes:
+        - lasp_dist:/dist
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+        with:
+          submodules: true
+
+      - name: Build and test
+        run: |
+          pip install build pytest
+          python3 -m build
+          pip install dist/lasp*.whl
+          pytest
+
+      - name: Cleanup old dist files and copy new to /dist dir
+        run: |-
+          rm -f /dist/*
+          cp -v dist/* /dist
+
+  Release-Ubuntu:
+    runs-on: ubuntu-latest
+    container:
+      volumes:
+        - lasp_dist:/dist
+    needs: Build-Test-Ubuntu
+    if: startsWith(gitea.ref, 'refs/tags/v')
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: setup go
+        uses: https://github.com/actions/setup-go@v4
+        with:
+          go-version: '1.18'
+      - name: Release
+        uses: https://gitea.com/actions/release-action@main
+        working-directory: "/"
+        with:
+          files: |-
+            ../../../../../dist/**
+          api_key: '${{secrets.RELEASE_TOKEN}}'

.gitignore

@@ -1,23 +1,26 @@
 *.a
 *.pyc
 *.so
+*.dll
+*.pyd
+.ninja*
+build.ninja
 dist
-src/lasp.egg-info
-test/.ipynb_checkpoints
-src/lasp/lasp_config.h
 _deps
 compile_commands.json
 CMakeFiles
 CMakeCache.txt
 cmake_install.cmake
 Makefile
-build
 __pycache__
-cython_debug
 doc
 .ropeproject
 .ipynb_checkpoints
 .spyproject
-.cache
-_skbuild
 acme_log.log
+.venv
+.py-build-cmake_cache
+cpp_src/lasp_config.h
+.cache
+.vscode
+build

.gitmodules

@@ -6,7 +6,7 @@
 	url = https://github.com/gsl-lite/gsl-lite
 [submodule "DebugTrace-cpp"]
 	path = third_party/DebugTrace-cpp
-	url = https://github.com/MasatoKokubo/DebugTrace-cpp
+	url = https://github.com/asceenl/DebugTrace-cpp
 [submodule "armadillo-code"]
 	path = third_party/armadillo-code
 	url = https://gitlab.com/conradsnicta/armadillo-code
@@ -30,4 +30,7 @@
 	url = https://github.com/boostorg/core
 [submodule "third_party/uldaq"]
 	path = third_party/uldaq
-	url = https://github.com/mccdaq/uldaq
+	url = https://github.com/asceenl/uldaq
+[submodule "third_party/portaudio"]
+	path = third_party/portaudio
+	url = https://github.com/PortAudio/portaudio

.pre-commit-config.yaml

@@ -0,0 +1,18 @@
+---
+repos:
+  - repo: https://github.com/commitizen-tools/commitizen
+    rev: 3.5.3
+    hooks:
+     - id: commitizen
+     - id: commitizen-branch
+       stages: [push]
+
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v2.3.0
+    hooks:
+    - id: end-of-file-fixer
+    - id: trailing-whitespace
+  - repo: https://github.com/psf/black
+    rev: 22.10.0
+    hooks:
+    - id: black

CHANGELOG.md

@@ -0,0 +1,7 @@
+## v1.0.1 (2023-07-19)
+
+### Fix
+
+- Added patch number to semver in pyproject.toml
+
+## v1.0.0 (2023-07-19)

CMakeLists.txt

@@ -1,13 +1,42 @@
-cmake_minimum_required (VERSION 3.16) 
-project(LASP LANGUAGES C CXX VERSION 1.0)
-
+cmake_minimum_required(VERSION 3.16)
+project(LASP LANGUAGES C CXX VERSION 1.6.3)
 
 set(CMAKE_CXX_STANDARD 17)
 set(CMAKE_CXX_STANDARD_REQUIRED)
 
-option(LASP_DOUBLE_PRECISION "Compile as double precision floating point" ON)
-option(LASP_HAS_RTAUDIO "Compile with RtAudio Daq backend" ON)
-option(LASP_HAS_ULDAQ "Compile with UlDaq backend" ON)
+# Experimental: support for Raspberry Pi (64-bit architectures)
+if(${CMAKE_SYSTEM_PROCESSOR} STREQUAL "aarch64")
+    set(RPI TRUE)
+else()
+    set(RPI FALSE)
+endif()
+
+# Setting defaults for PortAudio and RtAudio backend, depending on Linux /
+# Windows.
+set(DEFAULT_DOUBLE_PRECISION ON)
+if(WIN32)
+    set(DEFAULT_RTAUDIO OFF)
+    set(DEFAULT_PORTAUDIO ON)
+    set(DEFAULT_ULDAQ OFF)
+elseif(${RPI})
+    set(DEFAULT_RTAUDIO OFF)
+    set(DEFAULT_PORTAUDIO ON)
+    set(DEFAULT_ULDAQ OFF)
+    set(DEFAULT_DOUBLE_PRECISION OFF)
+else()
+    set(DEFAULT_RTAUDIO OFF)
+    set(DEFAULT_PORTAUDIO ON)
+    set(DEFAULT_ULDAQ ON)
+endif()
+
+
+option(LASP_DOUBLE_PRECISION "Compile as double precision floating point" ${DEFAULT_DOUBLE_PRECISION})
+option(LASP_HAS_RTAUDIO "Compile with RtAudio Daq backend" ${DEFAULT_RTAUDIO})
+option(LASP_HAS_PORTAUDIO "Compile with PortAudio Daq backend" ${DEFAULT_PORTAUDIO})
+if(LASP_HAS_PORTAUDIO AND LASP_HAS_RTAUDIO)
+    message(FATAL_ERROR "Either PortAudio or RtAudio can be selected as audio backend")
+endif()
+option(LASP_HAS_ULDAQ "Compile with UlDaq backend" ${DEFAULT_ULDAQ})
 option(LASP_BUILD_TUNED "Tune build for current machine (Experimental / untested)" OFF)
 option(LASP_WITH_OPENMP "Use OpenMP parallelization (Experimental: crashes SHOULD BE EXPECTED)" OFF)
 set(LASP_MAX_NFFT "33554432" CACHE STRING "Max FFT size")
@@ -17,7 +46,7 @@ option(LASP_BUILD_CPP_TESTS "Build CPP test code" OFF)
 find_program(CCACHE_PROGRAM ccache)
 if(CCACHE_PROGRAM)
     set_property(GLOBAL PROPERTY RULE_LAUNCH_COMPILE "${CCACHE_PROGRAM}")
-    set_property(GLOBAL PROPERTY RULE_LAUNCH_LINK  "${CCACHE_PROGRAM}")
+    set_property(GLOBAL PROPERTY RULE_LAUNCH_LINK "${CCACHE_PROGRAM}")
 endif()
 
 # To allow linking to static libs from other directories
@@ -27,7 +56,6 @@ cmake_policy(SET CMP0079 NEW)
 set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
 
 set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${PROJECT_SOURCE_DIR}/cmake")
-include_directories(/usr/include/python3.8)
 include("BuildType")
 include("QueryPythonForPybind11")
 
@@ -88,20 +116,29 @@ else()
 endif()
 
 # ###################################### Compilation flags
-set(CMAKE_C_FLAGS_RELEASE  "-O3 -flto -mfpmath=sse -march=x86-64 -mtune=native \
+set(CMAKE_C_FLAGS_RELEASE "-O3 -flto -mtune=native \
 -fdata-sections -ffunction-sections -fomit-frame-pointer -finline-functions")
-set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wextra -Wno-type-limits")
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wextra -Wno-type-limits -Werror=return-type")
 
+set(CMAKE_CXX_FLAGS_RELEASE "-O3 -flto -mtune=native \
+-fdata-sections -ffunction-sections -fomit-frame-pointer -finline-functions")
+
+if(NOT ${RPI})
+    set(CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE} -mfpmath=sse -march=x86-64")
+    set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -mfpmath=sse -march=x86-64")
+endif()
+set(CMAKE_CXX_FLAGS_DEBUG "-O0 -g -Wall ")
 
 # ############################# End compilation flags
-include_directories(/usr/lib/python3.10/site-packages/numpy/core/include)
 
 # ####################################### End of user-adjustable variables section
 include(OSSpecific)
 include(rtaudio)
+include(portaudio)
 include(uldaq)
 #
-add_subdirectory(src/lasp)
+add_definitions(-Dgsl_CONFIG_DEFAULTS_VERSION=1)
+add_subdirectory(cpp_src)
 if(LASP_BUILD_CPP_TESTS)
     add_subdirectory(test)
 endif()

Dockerfile

@@ -1,13 +1,16 @@
-FROM archlinux
+FROM archlinux:latest
 MAINTAINER J.A. de Jong - j.a.dejong@ascee.nl
 RUN pacman --noconfirm -Sy
-RUN pacman --noconfirm -S git doxygen graphviz lighttpd python-pip
-RUN pip install doxypypy
+RUN pacman --noconfirm -S git doxygen graphviz lighttpd python-pip python-virtualenv
 WORKDIR /root
+ENV VIRTUAL_ENV=/root/testenv
+RUN python3 -m venv $VIRTUAL_ENV
+ENV PATH="$VIRTUAL_ENV/bin:$PATH"
+RUN pip install doxypypy
 RUN git clone https://code.ascee.nl/ascee/lasp
 WORKDIR /root/lasp
 RUN doxygen
-RUN rm -rf /srv//http
+RUN rm -rf /srv/http
 RUN mv doc/html /srv/http
 CMD /usr/bin/lighttpd -D -f /etc/lighttpd/lighttpd.conf
 

README.md

@@ -1,7 +1,5 @@
-# Library for Acoustic Signal Processing
-
-- Master branch: [![Build Status](https://drone.ascee.nl/api/badges/ASCEE/lasp/status.svg?ref=refs/heads/master)](https://drone.ascee.nl/ASCEE/lasp)
-- Develop branch: [![Build Status](https://drone.ascee.nl/api/badges/ASCEE/lasp/status.svg?ref=refs/heads/develop)](https://drone.ascee.nl/ASCEE/lasp)
+Library for Acoustic Signal Processing
+======================================
 
 
 Welcome to LASP: Library for Acoustic Signal Processing. LASP is a C++ library
@@ -9,6 +7,7 @@ with a Python interface which is supposed to acquire and process (multi) sensor
 
 Current features that are implemented:
 
+
 - Communication with data acquisition (DAQ) devices, of which:
     - Internal sound cards via the [RtAudio](http://www.music.mcgill.ca/~gary/rtaudio) backend. Many thanks to Gary P. Scavone et al.
     - [Measurement Computing](https://www.mccdaq.com) [DT9838A](https://www.mccdaq.com/Products/Sound-Vibration-DAQ/DT9837) signal analyzer.
@@ -32,54 +31,127 @@ Current features that are implemented:
 - Spectra data smoothing algorithms
 - Sensor calibration for microphones
 
+
 Future features (wish-list)
 
+
 - Conventional and delay-and-sum beam-forming algorithms
 - Impedance tube measurement processing
 
 For now, the source code is well-documented on [lasp.ascee.nl](https://lasp.ascee.nl) but it requires some
 additional documentation (the math behind it). This is maintained
-in a sister repository [lasp-doc](https://code.ascee.nl/ascee/lasp-doc). The
-most recent
+in a sister repository [lasp-doc](https://code.ascee.nl/ascee/lasp-doc).
 
-If you have any question(s), please feel free to contact us: info@ascee.nl.
+If you have any question(s), please feel free to contact us: [email](info@ascee.nl).
 
-# Installation
 
-## Dependencies
+# Installation - Linux (Ubuntu-based)
 
-- `$ sudo apt install python3-pybind11 libopenblas-dev python3-pip python3-scipy libusb-1.0-0-dev libpulse-dev cmake-curses-gui python3-h5py`
-- `$ pip3 install --user -r requirements.txt`
+## Prerequisites
 
+Run the following on the command line to install all prerequisites on
+Debian-based Linux, x86-64:
+
+- `sudo apt install python3-pip libfftw3-3 libopenblas-base libusb-1.0-0 libpulse0`
+
+
+## Installation from wheel (recommended for non-developers)
+
+Go to: [LASP releases](https://code.ascee.nl/ASCEE/lasp/releases/latest/) and
+download the latest `.whl`. Then run:
+
+- `pip install lasp-*-linux_x86_64.whl`
+
+## From source (Ubuntu-based)
+
+### Prerequisites
+
+Run the following one-liner:
+
+- `sudo apt install -y git python3 python3-virtualenv python3-venv libopenblas-dev python3-pip libfftw3-dev libusb-1.0-0-dev libpulse-dev python3-build`
 
 If building RtAudio with the ALSA backend, you will also require the following packages:
 
-- libclalsadrv-dev
+- `sudo apt install libclalsadrv-dev`
 
 If building RtAudio with the Jack Audio Connection Kit (JACK) backend, you will also require the following packages:
 
-- libjack-jackd2-dev
+- `sudo apt install libjack-jackd2-dev`
 
-## Download & build
+### Download & build
 
 - `$ git clone --recursive https://code.ascee.nl/ASCEE/lasp.git`
 - `$ cd lasp`
+- `pip install -e .`
 
-For a release build:
+# Building and installation for Raspberry Pi (Raspberry Pi OS)
 
-- `$ cmake .`
+Run the following on the command line to install all prerequisites on
+Raspberry Pi OS:
 
-or optionally for a custom build:
+- `sudo apt install libfftw3-dev libopenblas64-dev libhdf5-dev libclalsadrv-dev`
 
-- `$ ccmake .`
+In a virtualenv: install `build`
 
-Configure and run:
+- `$ pip install build`
 
-- `$ make -j`
+Then run:
 
-### Build documentation
+- `$ git clone --recursive https://code.ascee.nl/ASCEE/lasp.git`
+- `$ cd lasp`
+- `$ pyproject-build`
 
-In directory:
+Which will generate a `whl` in the `dist` folder, that is redistributable for Raspberry Pis that run Raspberry Pi OS.
+
+When installing the `whl`, it appears that H5PY takes quite some time to install. To follow this process, run it it verbose mode.
+
+
+# Installation - (x86_64) Windows (with WinPython), build with MSYS2
+
+## Prerequisites
+
+- Download and install [WinPython](https://winpython.github.io)
+
+## From wheel
+
+- Download latest wheel from [LASP releases](https://code.ascee.nl/ASCEE/lasp/releases/latest/) and
+download the latest `.whl`. Then install with `pip`.
+
+## From source
+
+- Download and install [MSYS2](https://msys2.org). Make sure to install the
+  x86_64 version.
+- When unzipping WinPython, make sure to choose a proper and simple path, i.e.
+  C:\winpython
+- Download and install [Git for Windows](https://git-scm.com)
+- Open an MSYS2 **MINGW64** terminal, and install some tools we require:
+  - `$ pacman -S git`
+- Create a new virtualenv:
+  - `$ /c/winpython/<py-distr-dir>/python.exe -m venv venv`
+- Add the venv-python to the path (eases a lot of commands)
+  - `$ export PATH=$PATH:~/venv/Scripts`
+- Install `build`:
+  - `$ pip install build`
+- Clone LASP:
+  - `$ git clone --recurse-submodules https://code.ascee.nl/ascee/lasp && cd lasp`
+- If run for the first time, we have to install the libraries we depend on in
+  MSYS2 (this only has to be done on a fresh MSYS2 installation):
+  - `$ scripts/install_msys2_builddeps.sh`
+- Copy over required DLL's to be included in distribution:
+  - `scripts/copy_windows_dlls.sh`
+- And... build!
+  - `pyproject-build`
+- Lastly: the generated wheel can be installed in the current virtualenv:
+  - `pip install dist/lasp*.whl`
+
+
+# Documentation
+
+## Online
+
+[Online LASP documentation](https://lasp.ascee.nl/).
+
+## In directory (Linux/Debian)
 
 `$ sudo apt install doxygen graphviz`
 `$ pip install doxypypy`
@@ -92,21 +164,29 @@ This will build the documentation. It can be read by:
 
 `$ <YOUR-BROWSER> doc/html/index.html`
 
-Or via docker:
-
-`$ docker build -t lasp_ascee_nl:latest .`
-
-## Install
-
-For an editable install (while developing):
-
-- `$ pip3 install --prefix=$HOME/.local -e .`
-
-To install locally, for a fixed version:
-
-- `$ pip3 install --prefix=$HOME/.local`
-
-## Usage
+# Usage
 
 - See examples directories for IPython notebooks.
 - Please refer to the [documentation](https://lasp.ascee.nl/) for features.
+
+
+# Development docs
+
+## Bumping version number
+
+When bumping the version number, please update the number in
+
+- `pyproject.toml`
+- `CMakeLists.txt`
+
+Then, create a commit with tag `vX.X.X`, and push it.
+
+## Updating to latest version (editable mode)
+
+When updating to the latest version of LASP in editable mode:
+
+```bash
+- $ git pull
+- $ git submodule update
+- $ pip install -e . -v
+```

cmake/OSSpecific.cmake

@@ -1,29 +1,11 @@
 if(WIN32)
     set(home $ENV{USERPROFILE})
-
     # set(miniconda_dir ${home}\\Miniconda3)
-    message("Building for Windows")
-    include_directories(
-        ..\\rtaudio
-        C:\\mingw\\mingw64\\include\\OpenBLAS
-        link_directories(${home}\\miniconda3\\Library\\include)
-        )
-    set(CMAKE_MODULE_PATH "${CMAKE_MODULE_PATH} $miniconda_dir\\Lib\\cmake")
-    # include(
-    add_definitions(-DMS_WIN64)
-    link_directories(C:\\mingw\\mingw64\\lib)
-    link_directories(C:\\mingw\\mingw64\\bin)
-    link_directories(..\\rtaudio)
-    link_directories(${home}\\Miniconda3)
-    add_definitions(-DHAS_RTAUDIO_WIN_WASAPI_API)
-else() # Linux compile
-    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wfatal-errors")	
-    include_directories(/usr/local/include/rtaudio)
-    include_directories(/usr/include/rtaudio)
-    link_directories(/usr/local/lib)
-    # This should become optional later on, and be added to the windows list as
-    # well.
+	set(TARGET_OS_LINKLIBS winmm dsound setupapi ole32 uuid winmm)	
 
+    message("Building for Windows")
+else() # Linux compile
+    message("Building for Linux :)")
+	set(TARGET_OS_LINKLIBS "")
 endif()
-# The last argument here takes care of calling SIGABRT when an integer overflow
-# occures.
+

cmake/portaudio.cmake

@@ -0,0 +1,28 @@
+# ###################################### RtAudio
+if(LASP_HAS_PORTAUDIO)
+    message("Building with Portaudio backend")
+    if(WIN32)
+        set(PA_USE_ALSA FALSE CACHE BOOL "Build PortAudio with ALSA backend")
+		set(PA_USE_ASIO TRUE CACHE BOOL "Build PortAudio with ASIO backend")
+		set(PA_USE_DS FALSE CACHE BOOL "Build PortAudio with Directsound backend")
+		set(PA_USE_WMME FALSE CACHE BOOL "Build PortAudio with WMME backend")
+		set(PA_USE_WDMKS FALSE CACHE BOOL "Build PortAudio with WDMKS backend")
+    else()
+        # Unix
+        set(PA_USE_ALSA TRUE CACHE BOOL "Build PortAudio with ALSA backend")
+        set(PA_USE_JACK FALSE CACHE BOOL "Build PortAudio with Jack backend")
+        set(PA_USE_PULSEAUDIO FALSE CACHE BOOL "Build PortAudio with PulseAudio backend")
+        set(PA_BUILD_SHARED_LIBS FALSE CACHE BOOL "Build static library")
+    endif()
+
+    add_subdirectory(third_party/portaudio)
+    include_directories(third_party/portaudio/include)
+    link_directories(third_party/portaudio)
+
+    if(PA_USE_ALSA)
+    add_definitions(-DLASP_HAS_PA_ALSA=1)
+    else()
+    add_definitions(-DLASP_HAS_PA_ALSA=0)
+    endif()
+
+endif()

cmake/rtaudio.cmake

@@ -2,12 +2,13 @@
 if(LASP_HAS_RTAUDIO)
     message("Building RtAudio backend")
     if(WIN32)
-        set(RTAUDIO_API_WASAPI TRUE CACHE BOOL "Build for WASAPI" FORCE)
+        set(RTAUDIO_API_WASAPI FALSE CACHE BOOL "Build for WASAPI backend")
+		set(RTAUDIO_API_DS TRUE CACHE BOOL "Build for Directsound backend")
     else()
-        set(RTAUDIO_API_PULSE TRUE CACHE BOOL "Build with PulseAudio backend" FORCE)
-        set(RTAUDIO_API_ALSA OFF CACHE BOOL "Do not build with Alsa backend" FORCE)
-        set(RTAUDIO_API_JACK OFF CACHE BOOL "Do not build with Jack backend" FORCE)
+        set(RTAUDIO_API_PULSE TRUE CACHE BOOL "Build with PulseAudio backend")
+        set(RTAUDIO_API_ALSA OFF CACHE BOOL "Do not build with Alsa backend")
+        set(RTAUDIO_API_JACK OFF CACHE BOOL "Do not build with Jack backend")
     endif()
     set(RTAUDIO_BUILD_STATIC_LIBS ON CACHE BOOL "Build static libs for RtAudio" FORCE)
-    add_subdirectory(third_party/rtaudio)
+    add_subdirectory(${PROJECT_SOURCE_DIR}/third_party/rtaudio)
 endif()

cpp_src/CMakeLists.txt

@@ -0,0 +1,63 @@
+# src/lasp/CMakeLists.txt
+
+# Armadillo, don't build the wrapper lib, but instead directly link to
+# openblas.
+add_definitions(-DARMA_DONT_USE_WRAPPER)
+
+configure_file(lasp_config.h.in lasp_config.h)
+include_directories(${CMAKE_CURRENT_BINARY_DIR})
+include_directories(SYSTEM
+    ${PROJECT_SOURCE_DIR}/third_party/armadillo-code/include)
+
+include_directories(${PROJECT_SOURCE_DIR}/third_party/DebugTrace-cpp/include)
+include_directories(${PROJECT_SOURCE_DIR}/third_party/gsl-lite/include)
+include_directories(${PROJECT_SOURCE_DIR}/third_party/tomlplusplus/include)
+include_directories(${PROJECT_SOURCE_DIR}/third_party/thread-pool)
+
+if(LASP_HAS_RTAUDIO)
+    include_directories(${PROJECT_SOURCE_DIR}/third_party/rtaudio)
+endif()
+if(LASP_HAS_ULDAQ)
+    include_directories(${PROJECT_SOURCE_DIR}/third_party/uldaq/src)
+endif()
+
+add_subdirectory(device)
+add_subdirectory(dsp)
+
+pybind11_add_module(lasp_cpp MODULE lasp_cpp.cpp 
+    pybind11/lasp_deviceinfo.cpp
+    pybind11/lasp_daqconfig.cpp
+    pybind11//lasp_dsp_pybind.cpp
+    pybind11/lasp_streammgr.cpp
+    pybind11/lasp_daq.cpp
+    pybind11/lasp_deviceinfo.cpp
+    pybind11/lasp_pyindatahandler.cpp
+    pybind11/lasp_siggen.cpp
+    )
+
+target_link_libraries(lasp_cpp PRIVATE lasp_device_lib lasp_dsp_lib
+    ${OpenMP_CXX_LIBRARIES} ${LASP_FFT_LIBS} ${TARGET_OS_LINKLIBS})
+
+target_compile_definitions(lasp_cpp PRIVATE
+    MODULE_NAME=$<TARGET_FILE_BASE_NAME:lasp_cpp>
+    VERSION_INFO="${PY_FULL_VERSION}"
+)
+
+# Hide all symbols by default (including external libraries on Linux)
+if(CMAKE_BUILD_TYPE STREQUAL "Release")
+	set_target_properties(lasp_cpp PROPERTIES
+		CXX_VISIBILITY_PRESET "hidden"
+		VISIBILITY_INLINES_HIDDEN true)
+	if (CMAKE_SYSTEM_NAME MATCHES "Linux")
+		target_link_options(lasp_cpp PRIVATE "LINKER:--exclude-libs,ALL")
+	endif()
+endif()
+
+if(DEFINED PY_BUILD_CMAKE_MODULE_NAME)
+    # Install the Python module
+    install(TARGETS lasp_cpp
+            EXCLUDE_FROM_ALL
+            COMPONENT python_modules
+            DESTINATION ${PY_BUILD_CMAKE_MODULE_NAME})
+
+endif()

cpp_src/device/CMakeLists.txt

@@ -1,4 +1,6 @@
 # src/lasp/device/CMakeLists.txt
+include_directories(uldaq)
+include_directories(portaudio)
 
 add_library(lasp_device_lib OBJECT 
     lasp_daq.cpp
@@ -7,8 +9,12 @@ add_library(lasp_device_lib OBJECT
     lasp_deviceinfo.cpp
     lasp_rtaudiodaq.cpp
     lasp_streammgr.cpp
+    lasp_indatahandler.cpp
     lasp_uldaq.cpp
-    lasp_uldaq_impl.cpp
+    uldaq/lasp_uldaq_impl.cpp
+    uldaq/lasp_uldaq_bufhandler.cpp
+    uldaq/lasp_uldaq_common.cpp
+    portaudio/lasp_portaudiodaq.cpp
     )
 
 # Callback requires certain arguments that are not used by code. This disables
@@ -27,6 +33,13 @@ endif()
 if(LASP_HAS_RTAUDIO)
     target_link_libraries(lasp_device_lib rtaudio)
 endif()
+if(LASP_HAS_PORTAUDIO)
+    target_link_libraries(lasp_device_lib PortAudio)
+    if(WIN32)
+    else()
+        target_link_libraries(lasp_device_lib asound)
+    endif()
+endif()
 
 target_link_libraries(lasp_device_lib lasp_dsp_lib)
 

cpp_src/device/lasp_daq.cpp

@@ -1,7 +1,8 @@
-/* #define DEBUGTRACE_ENABLED */
+// #define DEBUGTRACE_ENABLED
 #include "debugtrace.hpp"
 #include "lasp_daqconfig.h"
 
+#include "lasp_config.h"
 #include "lasp_daq.h"
 #if LASP_HAS_ULDAQ == 1
 #include "lasp_uldaq.h"
@@ -9,6 +10,9 @@
 #if LASP_HAS_RTAUDIO == 1
 #include "lasp_rtaudiodaq.h"
 #endif
+#if LASP_HAS_PORTAUDIO == 1
+#include "lasp_portaudiodaq.h"
+#endif
 using rte = std::runtime_error;
 
 Daq::~Daq() { DEBUGTRACE_ENTER; }
@@ -27,6 +31,11 @@ std::unique_ptr<Daq> Daq::createDaq(const DeviceInfo &devinfo,
   if (devinfo.api.apicode == LASP_RTAUDIO_APICODE) {
     return createRtAudioDevice(devinfo, config);
   }
+#endif
+#if LASP_HAS_PORTAUDIO == 1
+  if (devinfo.api.apicode == LASP_PORTAUDIO_APICODE) {
+    return createPortAudioDevice(devinfo, config);
+  }
 #endif
   throw rte(string("Unable to match Device API: ") + devinfo.api.apiname);
 }
@@ -35,31 +44,41 @@ Daq::Daq(const DeviceInfo &devinfo, const DaqConfiguration &config)
     : DaqConfiguration(config), DeviceInfo(devinfo) {
   DEBUGTRACE_ENTER;
 
-  if (duplexMode()) {
-    if (neninchannels() == 0) {
-      throw rte("Duplex mode enabled, but no input channels enabled");
-    }
-
-    if (nenoutchannels() == 0) {
-      throw rte("Duplex mode enabled, but no output channels enabled");
-    }
+  if(!duplexMode() && monitorOutput) {
+    throw rte("Duplex mode requires enabling both input and output channels. Please make sure at least one output channel is enabled, or disable hardware output loopback in DAQ configuration.");
   }
 
   if (!hasInternalOutputMonitor && monitorOutput) {
     throw rte(
-        "Output monitor flag set, but device does not have output monitor");
+        "Output monitor flag set, but device does not have hardware output monitor.");
   }
 
   if (!config.match(devinfo)) {
     throw rte("DaqConfiguration does not match device info");
   }
-  if (neninchannels(false) > devinfo.ninchannels) {
-    throw rte(
-        "Number of enabled input channels is higher than device capability");
+
+  {
+    const int hich = getHighestEnabledInChannel();
+    if (hich + 1 > devinfo.ninchannels)
+    {
+      throw rte(
+          string("Highest of enabled input channel: ") +
+          to_string(hich) +
+          string(" is higher than device capability, which is: ") +
+          to_string(ninchannels) + ".");
+    }
   }
-  if (nenoutchannels() > devinfo.noutchannels) {
-    throw rte(
-        "Number of enabled output channels is higher than device capability");
+
+  {
+    const int hoch = getHighestEnabledOutChannel();
+    if (hoch + 1 > devinfo.noutchannels)
+    {
+      throw rte(
+          string("Highest of enabled output channel: ") +
+          to_string(hoch) +
+          string(" is higher than device capability, which is: ") +
+          to_string(noutchannels) + ".");
+    }
   }
 }
 

cpp_src/device/lasp_daq.h

@@ -5,6 +5,8 @@
 #include "lasp_types.h"
 #include <functional>
 #include <memory>
+#include <mutex>
+#include <atomic>
 
 /**
  * \defgroup device Device interfacing
@@ -13,12 +15,12 @@
  * @brief Callback of DAQ for input data. Callback should return
  * false for a stop request.
  */
-using InDaqCallback = std::function<bool(const DaqData &)>;
+using InDaqCallback = std::function<void(const DaqData &)>;
 
 /**
  * @brief
  */
-using OutDaqCallback = std::function<bool(DaqData &)>;
+using OutDaqCallback = std::function<void(DaqData &)>;
 
 /**
  * @brief Base cass for all DAQ (Data Acquisition) interfaces. A DAQ can be a
@@ -46,6 +48,10 @@ public:
       logicError,
     };
 
+    // Below the only members of this class, which are public.
+    bool isRunning = false;
+    StreamError errorType{StreamError::noError};
+
     /**
      * @brief Map between error types and messages
      */
@@ -59,7 +65,7 @@ public:
         {StreamError::logicError, "Logic error (probably a bug)"},
     };
 
-    bool isRunning = false;
+
     /**
      * @brief Check if stream has error
      *
@@ -67,8 +73,6 @@ public:
      */
     bool error() const { return errorType != StreamError::noError; };
 
-    StreamError errorType{StreamError::noError};
-
     std::string errorMsg() const { return errorMessages.at(errorType); }
 
     /**

cpp_src/device/lasp_daqconfig.cpp

@@ -35,12 +35,14 @@ DaqConfiguration::DaqConfiguration(const DeviceInfo &device) {
   us i = 0;
   for (auto &inch : inchannel_config) {
     inch.name = "Unnamed input channel " + std::to_string(i);
+    inch.rangeIndex = device.prefInputRangeIndex;
     i++;
   }
 
   i = 0;
   for (auto &outch : outchannel_config) {
     outch.name = "Unnamed output channel " + std::to_string(i);
+    outch.rangeIndex = device.prefOutputRangeIndex;
     i++;
   }
 
@@ -54,10 +56,12 @@ DaqConfiguration::DaqConfiguration(const DeviceInfo &device) {
 }
 
 bool DaqConfiguration::match(const DeviceInfo &dev) const {
+  DEBUGTRACE_ENTER;
   return (dev.device_name == device_name && dev.api == api);
 }
 
 int DaqConfiguration::getHighestEnabledInChannel() const {
+  DEBUGTRACE_ENTER;
   for (int i = inchannel_config.size() - 1; i > -1; i--) {
     if (inchannel_config.at(i).enabled)
       return i;
@@ -66,13 +70,15 @@ int DaqConfiguration::getHighestEnabledInChannel() const {
 }
 
 int DaqConfiguration::getHighestEnabledOutChannel() const {
-  for (us i = outchannel_config.size() - 1; i >= 0; i--) {
+  DEBUGTRACE_ENTER;
+  for (int i = outchannel_config.size() - 1; i > -1; i--) {
     if (outchannel_config.at(i).enabled)
       return i;
   }
   return -1;
 }
 int DaqConfiguration::getLowestEnabledInChannel() const {
+  DEBUGTRACE_ENTER;
   for (us i = 0; i < inchannel_config.size(); i++) {
     if (inchannel_config.at(i).enabled)
       return i;

cpp_src/device/lasp_daqconfig.h

@@ -137,15 +137,26 @@ const DaqApi uldaqapi("UlDaq", 0);
 #include "RtAudio.h"
 const us LASP_RTAUDIO_APICODE = 1;
 const DaqApi rtaudioAlsaApi("RtAudio Linux ALSA", 1, RtAudio::Api::LINUX_ALSA);
-const DaqApi rtaudioPulseaudioApi("RtAudio Linux Pulseaudio", 1,
+const DaqApi rtaudioPulseaudioApi("RtAudio Linux Pulseaudio", LASP_RTAUDIO_APICODE,
                                   RtAudio::Api::LINUX_PULSE);
-const DaqApi rtaudioWasapiApi("RtAudio Windows Wasapi", 1,
+const DaqApi rtaudioWasapiApi("RtAudio Windows Wasapi", LASP_RTAUDIO_APICODE,
                               RtAudio::Api::WINDOWS_WASAPI);
-const DaqApi rtaudioDsApi("RtAudio Windows DirectSound", 1,
+const DaqApi rtaudioDsApi("RtAudio Windows DirectSound", LASP_RTAUDIO_APICODE,
                           RtAudio::Api::WINDOWS_DS);
-const DaqApi rtaudioAsioApi("RtAudio Windows ASIO", 1,
+const DaqApi rtaudioAsioApi("RtAudio Windows ASIO", LASP_RTAUDIO_APICODE,
                             RtAudio::Api::WINDOWS_ASIO);
 #endif
+#if LASP_HAS_PORTAUDIO == 1
+const us LASP_PORTAUDIO_APICODE = 2;
+const DaqApi portaudioALSAApi("PortAudio Linux ALSA", LASP_PORTAUDIO_APICODE, 0);
+const DaqApi portaudioPulseApi("PortAudio Linux PulseAudio", LASP_PORTAUDIO_APICODE, 1);
+const DaqApi portaudioASIOApi("PortAudio Windows ASIO", LASP_PORTAUDIO_APICODE, 2);
+const DaqApi portaudioDSApi("PortAudio Windows DirectSound", LASP_PORTAUDIO_APICODE, 3);
+const DaqApi portaudioWMMEApi("PortAudio Windows WMME", LASP_PORTAUDIO_APICODE, 4);
+const DaqApi portaudioWASAPIApi("PortAudio Windows WASAPI", LASP_PORTAUDIO_APICODE, 5);
+const DaqApi portaudioWDMKS("PortAudio Windows WDMKS", LASP_PORTAUDIO_APICODE, 6);
+const DaqApi portaudioDirectSoundApi("PortAudio Windows DirectSound", LASP_PORTAUDIO_APICODE, 7);
+#endif
 
 class DeviceInfo;
 

cpp_src/device/lasp_daqdata.cpp

@@ -26,7 +26,9 @@ DaqData::DaqData(const us nframes, const us nchannels,
   DEBUGTRACE_PRINT(sw);
 
   assert(sw > 0 && sw <= 8);
-  _data = new (std::align_val_t{8}) byte_t[sw * nchannels * nframes];
+  _data = reinterpret_cast<byte_t *>(
+      new double[(sw * nchannels * nframes) / sizeof(double) + 1]);
+
   if (!_data) {
     throw rte("Could not allocate memory for DaqData!");
   }
@@ -52,7 +54,7 @@ DaqData::DaqData(DaqData &&o)
 DaqData::~DaqData() {
   DEBUGTRACE_ENTER;
   if (_data)
-    delete[] _data;
+    delete[](reinterpret_cast<double *>(_data));
 }
 
 void DaqData::copyInFromRaw(const std::vector<byte_t *> &ptrs) {

cpp_src/device/lasp_deviceinfo.cpp

@@ -10,6 +10,9 @@
 #if LASP_HAS_RTAUDIO == 1
 #include "lasp_rtaudiodaq.h"
 #endif
+#if LASP_HAS_PORTAUDIO == 1
+#include "lasp_portaudiodaq.h"
+#endif
 
 
 DeviceInfoList DeviceInfo::getDeviceInfo() {
@@ -21,6 +24,9 @@ DeviceInfoList DeviceInfo::getDeviceInfo() {
 #if LASP_HAS_RTAUDIO == 1
   fillRtAudioDeviceInfo(devs);
 #endif
+#if LASP_HAS_PORTAUDIO == 1
+  fillPortAudioDeviceInfo(devs);
+#endif
 
   return devs;
 }

cpp_src/device/lasp_deviceinfo.h

@@ -19,6 +19,7 @@ public:
    * @brief Virtual desctructor. Can be derived class.
    */
   virtual ~DeviceInfo() {}
+  DeviceInfo& operator=(const DeviceInfo&) = delete;
 
   /**
    * @brief Clone a device info.
@@ -67,14 +68,26 @@ public:
   us prefFramesPerBlockIndex = 0;
 
   /**
-   * @brief Available ranges for the input,  i.e. +/- 1V and/or +/- 10 V etc.
+   * @brief Available ranges for the input, i.e. +/- 1V and/or +/- 10 V etc.
    */
   dvec availableInputRanges;
+
   /**
-   * @brief Its preffered range
+   * @brief Available ranges for the output, i.e. +/- 1V and/or +/- 10 V etc.
+   */
+  dvec availableOutputRanges;
+
+  /**
+   * @brief Its preffered input range
    */
   int prefInputRangeIndex = 0;
 
+  /**
+   * @brief Its preffered output range
+   */
+  int prefOutputRangeIndex = 0;
+
+
   /**
    * @brief The number of input channels available for the device
    */
@@ -124,13 +137,29 @@ public:
   bool duplexModeForced = false;
 
   /**
-   * @brief The physical quantity of the output signal. For 'normal' audio
+  * @brief Indicates whether the device is able to run in duplex mode. If false,
+  * devices cannot run in duplex mode, and the `duplexModeForced` flag is meaningless.
+  */
+  bool hasDuplexMode = false;
+
+  /**
+   * @brief The physical quantity of the input signal from DAQ. For 'normal' audio
+   * interfaces, this is typically a 'number' between +/- full scale. For some
+   * real DAQ devices however, the input quantity corresponds to a physical signal,
+   * such a Volts.
+   */
+
+  DaqChannel::Qty physicalInputQty = DaqChannel::Qty::Number;
+
+  /**
+   * @brief The physical quantity of the output signal from DAQ. For 'normal' audio
    * devices, this is typically a 'number' between +/- full scale. For some
-   * devices however, the output quantity corresponds to a physical signal,
+   * real DAQ devices however, the input quantity corresponds to a physical signal,
    * such a Volts.
    */
   DaqChannel::Qty physicalOutputQty = DaqChannel::Qty::Number;
 
+
   /**
    * @brief String representation of DeviceInfo
    *

cpp_src/device/lasp_indatahandler.cpp

@@ -0,0 +1,61 @@
+// #define DEBUGTRACE_ENABLED
+#include "lasp_indatahandler.h"
+#include "debugtrace.hpp"
+#include "lasp_streammgr.h"
+#include <thread>
+
+InDataHandler::InDataHandler(SmgrHandle mgr, const InCallbackType cb,
+                             const ResetCallbackType resetfcn)
+    : _mgr(mgr), inCallback(cb), reset(resetfcn)
+#if LASP_DEBUG == 1
+      ,
+      main_thread_id(std::this_thread::get_id())
+#endif
+{
+  DEBUGTRACE_ENTER;
+#if LASP_DEBUG == 1
+  assert(mgr->main_thread_id == main_thread_id);
+#endif
+}
+void InDataHandler::start() {
+  DEBUGTRACE_ENTER;
+  checkRightThread();
+  if (SmgrHandle handle = _mgr.lock()) {
+    handle->addInDataHandler(this);
+#if LASP_DEBUG == 1
+    assert(handle->main_thread_id == main_thread_id);
+#endif
+  }
+}
+void InDataHandler::stop() {
+  DEBUGTRACE_ENTER;
+  // checkRightThread();
+#if LASP_DEBUG == 1
+  stopCalled = true;
+#endif
+  if (SmgrHandle smgr = _mgr.lock()) {
+    smgr->removeInDataHandler(*this);
+  } else {
+    DEBUGTRACE_PRINT("No stream manager alive anymore!");
+  }
+}
+
+InDataHandler::~InDataHandler() {
+
+  DEBUGTRACE_ENTER;
+#if LASP_DEBUG == 1
+  // checkRightThread();
+  if (!stopCalled) {
+    std::cerr << "************ BUG: Stop function not called while arriving at "
+                 "InDataHandler's destructor. Fix this by calling "
+                 "InDataHandler::stop()."
+              << std::endl;
+    abort();
+  }
+#endif
+}
+#if LASP_DEBUG == 1
+void InDataHandler::checkRightThread() const {
+  assert(std::this_thread::get_id() == main_thread_id);
+}
+#endif

cpp_src/device/lasp_indatahandler.h

@@ -0,0 +1,79 @@
+#pragma once
+#include "lasp_types.h"
+#include <atomic>
+#include <functional>
+#include <memory>
+#include <thread>
+
+class StreamMgr;
+using SmgrHandle = std::shared_ptr<StreamMgr>;
+
+class DaqData;
+class Daq;
+
+/** \addtogroup device
+ * @{
+ */
+
+/**
+ * @brief The function definition of callbacks with incoming DAQ data
+ */
+using InCallbackType = std::function<void(const DaqData &)>;
+/**
+ * @brief Function definition for the reset callback.
+ */
+using ResetCallbackType = std::function<void(const Daq *)>;
+
+class InDataHandler {
+
+protected:
+  std::weak_ptr<StreamMgr> _mgr;
+#if LASP_DEBUG == 1
+  // This is a flag to indicate whether the method stop() is called for the
+  // current handler. It should call the method stop() from the derived class's
+  // destructor.
+  std::atomic<bool> stopCalled{false};
+#endif
+
+public:
+  ~InDataHandler();
+  const InCallbackType inCallback;
+  const ResetCallbackType reset;
+
+  /**
+   * @brief When constructed, the handler is added to the stream manager, which
+   * will call the handlers's inCallback() until stop() is called.
+   *
+   * @param mgr Stream manager.
+   * @param cb The callback that is stored, and called on new DAQ data
+   * @param resetfcn The callback that is stored, and called when the DAQ
+   * changes state.
+   */
+  InDataHandler(SmgrHandle mgr, InCallbackType cb,
+                ResetCallbackType resetfcn);
+
+  /**
+   * @brief Adds the current InDataHandler to the list of handlers in the
+   * StreamMgr. After this happens, the reset() method stored in this
+   * object is called back. When the stream is running, right after this,
+   * inCallback() is called with DaqData.
+   */
+  void start();
+
+  /**
+   * @brief Removes the currend InDataHandler from the list of handlers in the
+   * StreamMgr. From that point on, the object can be safely destroyed. Not
+   * calling stop() before destruction of this object is considered a BUG. I.e.
+   * a class which *uses* an InDataHandler should always call stop() in its
+   * destructor.
+   */
+  void stop();
+
+#if LASP_DEBUG == 1
+  const std::thread::id main_thread_id;
+  void checkRightThread() const;
+#else
+  void checkRightThread() const {}
+#endif
+};
+/** @} */

cpp_src/device/lasp_rtaudiodaq.cpp

@@ -1,5 +1,5 @@
-#include <mutex>
 /* #define DEBUGTRACE_ENABLED */
+#include <mutex>
 #include "debugtrace.hpp"
 #include "lasp_mathtypes.h"
 
@@ -17,37 +17,46 @@ using rte = std::runtime_error;
 using std::vector;
 using lck = std::scoped_lock<std::mutex>;
 
-class RtAudioDeviceInfo : public DeviceInfo {
+const unsigned RTAUDIO_MAX_CHANNELS = 8;
+
+class RtAudioDeviceInfo : public DeviceInfo
+{
 public:
   /**
    * @brief Specific for the device (Sub-API). Important for the RtAudio
    * backend, as RtAudio is able to handle different API's.
    */
-  int _api_devindex;
-  virtual std::unique_ptr<DeviceInfo> clone() const override {
+  int ID; // Copy of RtAudio::DeviceInfo::ID
+  virtual std::unique_ptr<DeviceInfo> clone() const override
+  {
     return std::make_unique<DeviceInfo>(*this);
   }
 };
 
-void fillRtAudioDeviceInfo(DeviceInfoList &devinfolist) {
+void fillRtAudioDeviceInfo(DeviceInfoList &devinfolist)
+{
   DEBUGTRACE_ENTER;
 
   vector<RtAudio::Api> apis;
   RtAudio::getCompiledApi(apis);
 
-  for (auto api : apis) {
+  for (auto api : apis)
+  {
     RtAudio rtaudio(api);
-    us count = rtaudio.getDeviceCount();
-    for (us devno = 0; devno < count; devno++) {
+    const us count = rtaudio.getDeviceCount();
+
+    const auto ids = rtaudio.getDeviceIds();
+
+    for (us i = 0; i < count; i++)
+    {
+      us id = ids.at(i);
+
+      RtAudio::DeviceInfo devinfo = rtaudio.getDeviceInfo(id);
 
-      RtAudio::DeviceInfo devinfo = rtaudio.getDeviceInfo(devno);
-      if (!devinfo.probed) {
-        // Device capabilities not successfully probed. Continue to next
-        continue;
-      }
       // "Our device info struct"
       RtAudioDeviceInfo d;
-      switch (api) {
+      switch (api)
+      {
       case RtAudio::LINUX_ALSA:
         d.api = rtaudioAlsaApi;
         break;
@@ -70,42 +79,49 @@ void fillRtAudioDeviceInfo(DeviceInfoList &devinfolist) {
       }
 
       d.device_name = devinfo.name;
-      d._api_devindex = devno;
+      d.ID = id;
 
       /// When 48k is available we overwrite the default sample rate with the 48
       /// kHz value, which is our preffered rate,
       bool rate_48k_found = false;
 
-      for (us j = 0; j < devinfo.sampleRates.size(); j++) {
+      for (us j = 0; j < devinfo.sampleRates.size(); j++)
+      {
 
         us rate_int = devinfo.sampleRates[j];
 
         d.availableSampleRates.push_back((double)rate_int);
 
-        if (!rate_48k_found) {
+        if (!rate_48k_found)
+        {
 
-          if (devinfo.preferredSampleRate == rate_int) {
+          if (devinfo.preferredSampleRate == rate_int)
+          {
             d.prefSampleRateIndex = j;
           }
 
-          if (rate_int == 48000) {
+          if (rate_int == 48000)
+          {
             d.prefSampleRateIndex = j;
             rate_48k_found = true;
           }
         }
       }
 
-      d.noutchannels = devinfo.outputChannels;
-      d.ninchannels = devinfo.inputChannels;
+      d.noutchannels = std::min(devinfo.outputChannels, RTAUDIO_MAX_CHANNELS);
+      d.ninchannels = std::min(devinfo.inputChannels, RTAUDIO_MAX_CHANNELS);
 
       d.availableInputRanges = {1.0};
+      d.availableOutputRanges = {1.0};
 
       RtAudioFormat formats = devinfo.nativeFormats;
-      if (formats & RTAUDIO_SINT8) {
+      if (formats & RTAUDIO_SINT8)
+      {
         d.availableDataTypes.push_back(
             DataTypeDescriptor::DataType::dtype_int8);
       }
-      if (formats & RTAUDIO_SINT16) {
+      if (formats & RTAUDIO_SINT16)
+      {
         d.availableDataTypes.push_back(
             DataTypeDescriptor::DataType::dtype_int16);
       }
@@ -113,15 +129,18 @@ void fillRtAudioDeviceInfo(DeviceInfoList &devinfolist) {
       /*   d.availableDataTypes.push_back(DataTypeDescriptor::DataType::dtype_int24);
        */
       /* } */
-      if (formats & RTAUDIO_SINT32) {
+      if (formats & RTAUDIO_SINT32)
+      {
         d.availableDataTypes.push_back(
             DataTypeDescriptor::DataType::dtype_fl32);
       }
-      if (formats & RTAUDIO_FLOAT64) {
+      if (formats & RTAUDIO_FLOAT64)
+      {
         d.availableDataTypes.push_back(
             DataTypeDescriptor::DataType::dtype_fl64);
       }
-      if (d.availableDataTypes.size() == 0) {
+      if (d.availableDataTypes.size() == 0)
+      {
         std::cerr << "RtAudio: No data types found in device!" << endl;
       }
 
@@ -139,9 +158,8 @@ static int mycallback(void *outputBuffer, void *inputBuffer,
                       unsigned int nFrames, double streamTime,
                       RtAudioStreamStatus status, void *userData);
 
-static void myerrorcallback(RtAudioError::Type, const string &errorText);
-
-class RtAudioDaq : public Daq {
+class RtAudioDaq : public Daq
+{
 
   RtAudio rtaudio;
   const us nFramesPerBlock;
@@ -177,24 +195,24 @@ public:
 
       inParams = std::make_unique<RtAudio::StreamParameters>();
 
-      // +1 to get the count.
-      inParams->nChannels = getHighestEnabledInChannel() + 1;
-      if (inParams->nChannels < 1) {
-        throw rte("Invalid input number of channels");
-      }
+      /// RtAudio lacks good bookkeeping when the first channel is not equal to
+      /// 0. For now, our fix is to shift out the channels we want, and let
+      /// RtAudio pass on all channels.
       inParams->firstChannel = 0;
-      inParams->deviceId = devinfo._api_devindex;
-
-    } else {
+      inParams->nChannels = devinfo.ninchannels;
+      inParams->deviceId = devinfo.ID;
+    }
+    else
+    {
 
       outParams = std::make_unique<RtAudio::StreamParameters>();
 
-      outParams->nChannels = getHighestEnabledOutChannel() + 1;
-      if (outParams->nChannels < 1) {
-        throw rte("Invalid output number of channels");
-      }
+      /// RtAudio lacks good bookkeeping when the first channel is not equal to
+      /// 0. For now, our fix is to shift out the channels we want, and let
+      /// RtAudio pass on all channels.
       outParams->firstChannel = 0;
-      outParams->deviceId = devinfo._api_devindex;
+      outParams->nChannels = devinfo.noutchannels;
+      outParams->deviceId = devinfo.ID;
     }
 
     RtAudio::StreamOptions streamoptions;
@@ -207,7 +225,8 @@ public:
     RtAudioFormat format;
     using Dtype = DataTypeDescriptor::DataType;
     const Dtype dtype = dataType();
-    switch (dtype) {
+    switch (dtype)
+    {
     case Dtype::dtype_fl32:
       DEBUGTRACE_PRINT("Datatype float32");
       format = RTAUDIO_FLOAT32;
@@ -238,36 +257,46 @@ public:
     unsigned int nFramesPerBlock_copy = nFramesPerBlock;
 
     // Final step: open the stream.
-    rtaudio.openStream(outParams.get(), inParams.get(), format,
-                       static_cast<us>(samplerate()), &nFramesPerBlock_copy,
-                       mycallback, (void *)this, &streamoptions,
-                       &myerrorcallback);
+    RtAudioErrorType err = rtaudio.openStream(outParams.get(), inParams.get(), format,
+                                              static_cast<us>(samplerate()), &nFramesPerBlock_copy,
+                                              mycallback, (void *)this, &streamoptions);
+    if (err != RTAUDIO_NO_ERROR)
+    {
+      throw std::runtime_error(string("Error opening stream: ") + rtaudio.getErrorText());
+    }
 
-    if (nFramesPerBlock_copy != nFramesPerBlock) {
-      throw rte("Got different number of frames per block back from RtAudio "
-                "backend. I do not know what to do.");
+    if (nFramesPerBlock_copy != nFramesPerBlock)
+    {
+      throw rte(string("Got different number of frames per block back from RtAudio "
+                       "backend: ") +
+                std::to_string(nFramesPerBlock_copy) + ". I do not know what to do.");
     }
   }
 
   virtual void start(InDaqCallback inCallback,
-                     OutDaqCallback outCallback) override final {
+                     OutDaqCallback outCallback) override final
+  {
 
     DEBUGTRACE_ENTER;
 
     assert(!monitorOutput);
 
-    if (getStreamStatus().runningOK()) {
+    if (getStreamStatus().runningOK())
+    {
       throw rte("Stream already running");
     }
 
     // Logical XOR
-    if (inCallback && outCallback) {
+    if (inCallback && outCallback)
+    {
       throw rte("Either input or output stream possible for RtAudio. "
                 "Stream duplex mode not provided.");
     }
 
-    if (neninchannels() > 0) {
-      if (!inCallback) {
+    if (neninchannels() > 0)
+    {
+      if (!inCallback)
+      {
         throw rte(
 
             "Input callback given, but stream does not provide input data");
@@ -275,8 +304,10 @@ public:
 
       _incallback = inCallback;
     }
-    if (nenoutchannels() > 0) {
-      if (!outCallback) {
+    if (nenoutchannels() > 0)
+    {
+      if (!outCallback)
+      {
         throw rte(
             "Output callback given, but stream does not provide output data");
       }
@@ -284,7 +315,11 @@ public:
     }
 
     // Start the stream. Throws on error.
-    rtaudio.startStream();
+    const auto err = rtaudio.startStream();
+    if (err != RTAUDIO_NO_ERROR)
+    {
+      throw std::runtime_error(string("Error starting stream: ") + rtaudio.getErrorText());
+    }
 
     // If we are here, we are running without errors.
     StreamStatus status;
@@ -294,10 +329,15 @@ public:
 
   StreamStatus getStreamStatus() const override final { return _streamStatus; }
 
-  void stop() override final {
+  void stop() override final
+  {
     DEBUGTRACE_ENTER;
-    if (getStreamStatus().runningOK()) {
-      rtaudio.stopStream();
+    if (getStreamStatus().runningOK())
+    {
+      const auto err = rtaudio.stopStream();
+      if(err != RTAUDIO_NO_ERROR) {
+        std::cerr << "Error occured while stopping the stream: " << rtaudio.getErrorText() << endl;
+      }
     }
     StreamStatus s = _streamStatus;
     s.isRunning = false;
@@ -306,14 +346,16 @@ public:
   }
 
   int streamCallback(void *outputBuffer, void *inputBuffer,
-                     unsigned int nFrames, RtAudioStreamStatus status) {
+                     unsigned int nFrames, RtAudioStreamStatus status)
+  {
 
     DEBUGTRACE_ENTER;
 
     using se = StreamStatus::StreamError;
 
     int rval = 0;
-    auto stopWithError = [&](se e) {
+    auto stopWithError = [&](se e)
+    {
       DEBUGTRACE_PRINT("stopWithError");
       StreamStatus stat = _streamStatus;
       stat.errorType = e;
@@ -322,7 +364,8 @@ public:
       rval = 1;
     };
 
-    switch (status) {
+    switch (status)
+    {
     case RTAUDIO_INPUT_OVERFLOW:
       stopWithError(se::inputXRun);
       return 1;
@@ -338,44 +381,46 @@ public:
     const auto &dtype_descr = dtypeDescr();
     const auto dtype = dataType();
 
-    us neninchannels = this->neninchannels();
-    us nenoutchannels = this->nenoutchannels();
-    us sw = dtype_descr.sw;
-    if (nFrames != nFramesPerBlock) {
+    const us neninchannels = this->neninchannels();
+    const us nenoutchannels = this->nenoutchannels();
+    const us sw = dtype_descr.sw;
+    if (nFrames != nFramesPerBlock)
+    {
       cerr << "RtAudio backend error: nFrames does not match block size!"
            << endl;
       stopWithError(se::logicError);
       return 1;
     }
 
-    if (inputBuffer) {
+    if (inputBuffer)
+    {
       assert(_incallback);
       std::vector<byte_t *> ptrs;
       ptrs.reserve(neninchannels);
 
       const us ch_min = getLowestEnabledInChannel();
       const us ch_max = getHighestEnabledInChannel();
-      us i = 0;
-      for (us ch = ch_min; ch <= ch_max; ch++) {
-        if (inchannel_config.at(ch).enabled) {
+      assert(ch_min < ninchannels);
+      assert(ch_max < ninchannels);
+
+      /// Only pass on the pointers of the channels we want
+      for (us ch = ch_min; ch <= ch_max; ch++)
+      {
+        if (inchannel_config.at(ch).enabled)
+        {
           byte_t *ptr =
-              static_cast<byte_t *>(inputBuffer) + sw * i * nFramesPerBlock;
-          DEBUGTRACE_PRINT((us)ptr);
+              static_cast<byte_t *>(inputBuffer) + sw * ch * nFramesPerBlock;
           ptrs.push_back(ptr);
         }
-        i++;
       }
       DaqData d{nFramesPerBlock, neninchannels, dtype};
       d.copyInFromRaw(ptrs);
 
-      bool ret = _incallback(d);
-      if (!ret) {
-        stopWithError(se::noError);
-        return 1;
-      }
+      _incallback(d);
     }
 
-    if (outputBuffer) {
+    if (outputBuffer)
+    {
       assert(_outcallback);
       std::vector<byte_t *> ptrs;
       ptrs.reserve(nenoutchannels);
@@ -384,24 +429,24 @@ public:
 
       const us ch_min = getLowestEnabledOutChannel();
       const us ch_max = getHighestEnabledOutChannel();
-      us i = 0;
-      for (us ch = ch_min; ch <= ch_max; ch++) {
-        if (outchannel_config.at(ch).enabled) {
-
+      assert(ch_min < noutchannels);
+      assert(ch_max < noutchannels);
+      /// Only pass on the pointers of the channels we want
+      for (us ch = ch_min; ch <= ch_max; ch++)
+      {
+        if (outchannel_config.at(ch).enabled)
+        {
           ptrs.push_back(static_cast<byte_t *>(outputBuffer) +
-                         sw * i * nFramesPerBlock);
+                         sw * ch * nFramesPerBlock);
         }
-        i++;
       }
       DaqData d{nFramesPerBlock, nenoutchannels, dtype};
 
-      bool ret = _outcallback(d);
-      if (!ret) {
-        stopWithError(se::noError);
-        return 1;
-      }
+      _outcallback(d);
+      // Copy over the buffer
       us j = 0;
-      for (auto ptr : ptrs) {
+      for (auto ptr : ptrs)
+      {
         d.copyToRaw(j, ptr);
         j++;
       }
@@ -417,17 +462,16 @@ public:
 };
 
 std::unique_ptr<Daq> createRtAudioDevice(const DeviceInfo &devinfo,
-                                         const DaqConfiguration &config) {
+                                         const DaqConfiguration &config)
+{
   return std::make_unique<RtAudioDaq>(devinfo, config);
 }
 
-void myerrorcallback(RtAudioError::Type, const string &errorText) {
-  cerr << "RtAudio backend stream error: " << errorText << endl;
-}
 int mycallback(
     void *outputBuffer, void *inputBuffer, unsigned int nFrames,
     __attribute__((unused)) double streamTime, // Not used parameter streamTime
-    RtAudioStreamStatus status, void *userData) {
+    RtAudioStreamStatus status, void *userData)
+{
 
   return static_cast<RtAudioDaq *>(userData)->streamCallback(
       outputBuffer, inputBuffer, nFrames, status);

cpp_src/device/lasp_rtaudiodaq.h

@@ -0,0 +1,35 @@
+#pragma once
+#include "lasp_daq.h"
+#include <memory>
+
+/** \addtogroup device
+ * @{
+ * \defgroup rtaudio RtAudio backend
+ * This code is used to interface with the RtAudio cross-platform audio
+ * interface.
+ *
+ * \addtogroup rtaudio
+ * @{
+ */
+
+
+/**
+ * @brief Method called from Daq::createDaq.
+ *
+ * @param devinfo Device info
+ * @param config DAQ Configuration settings
+ *
+ * @return Pointer to Daq instance. Throws Runtime errors on error.
+ */
+std::unique_ptr<Daq> createRtAudioDevice(const DeviceInfo& devinfo,
+        const DaqConfiguration& config);
+
+/**
+ * @brief Append RtAudio backend devices to the list
+ *
+ * @param devinfolist List to append to
+ */
+void fillRtAudioDeviceInfo(DeviceInfoList &devinfolist);
+
+/** @} */
+/** @} */

cpp_src/device/lasp_streammgr.cpp

@@ -1,103 +1,136 @@
-/* #define DEBUGTRACE_ENABLED */
+// #define DEBUGTRACE_ENABLED
 #include "lasp_streammgr.h"
-#include "debugtrace.hpp"
-#include "lasp_biquadbank.h"
-#include "lasp_thread.h"
-#include <algorithm>
+
 #include <assert.h>
+
+#include <algorithm>
 #include <functional>
 #include <iostream>
+#include <memory>
+#include <mutex>
+#include <thread>
+
+#include "debugtrace.hpp"
+#include "lasp_biquadbank.h"
+#include "lasp_indatahandler.h"
+#include "lasp_thread.h"
+
+using namespace std::literals::chrono_literals;
 
 using std::cerr;
 using std::endl;
 using rte = std::runtime_error;
 
-InDataHandler::InDataHandler(StreamMgr &mgr) : _mgr(mgr) { DEBUGTRACE_ENTER; }
-void InDataHandler::start() {
-  DEBUGTRACE_ENTER;
-  _mgr.addInDataHandler(*this);
-}
-void InDataHandler::stop() {
-#if LASP_DEBUG == 1
-  stopCalled = true;
-#endif
-  _mgr.removeInDataHandler(*this);
-}
-InDataHandler::~InDataHandler() {
+/**
+ * @brief The main global handle to a stream, stored in a weak pointer, if it
+ * does not yet exist, via StreamMgr::getInstance, a new stream mgr is created.
+ * It also makes sure that the stream manager is deleted once the latest handle
+ * to it has been destroyed (no global stuff left).
+ */
+std::weak_ptr<StreamMgr> _mgr;
+std::mutex _mgr_mutex;
 
+using Lck = std::scoped_lock<std::recursive_mutex>;
+
+/**
+ * @brief The only way to obtain a stream manager, can only be called from the
+ * thread that does it the first time.
+ *
+ * @return Stream manager handle
+ */
+SmgrHandle StreamMgr::getInstance() {
   DEBUGTRACE_ENTER;
-#if LASP_DEBUG == 1
-  if (!stopCalled) {
-    cerr << "************ BUG: Stop function not called while arriving at "
-            "InDataHandler's destructor. Fix this by calling "
-            "InDataHandler::stop() from the derived class' destructor."
-         << endl;
-    abort();
+
+  std::scoped_lock<std::mutex> lck(_mgr_mutex);
+  auto mgr = _mgr.lock();
+  if (!mgr) {
+    // Double Check Locking Pattern, if two threads would simultaneously
+    // instantiate the singleton instance.
+
+    auto mgr = _mgr.lock();
+    if (mgr) {
+      return mgr;
+    }
+
+    mgr = SmgrHandle(new StreamMgr());
+    if (!mgr) {
+      throw rte("Fatal: could not allocate stream manager!");
+    }
+    // Update global weak pointer
+    _mgr = mgr;
+    return mgr;
   }
+#if LASP_DEBUG == 1
+  // Make sure we never ask for a new SmgrHandle from a different thread.
+  assert(std::this_thread::get_id() == mgr->main_thread_id);
 #endif
-}
 
-StreamMgr &StreamMgr::getInstance() {
-
-  DEBUGTRACE_ENTER;
-  static StreamMgr mgr;
   return mgr;
 }
-StreamMgr::StreamMgr() {
-  DEBUGTRACE_ENTER;
+
+StreamMgr::StreamMgr()
 #if LASP_DEBUG == 1
-  _main_thread_id = std::this_thread::get_id();
+    : main_thread_id(std::this_thread::get_id())
 #endif
+{
+  DEBUGTRACE_ENTER;
   // Trigger a scan for the available devices, in the background.
   rescanDAQDevices(true);
 }
 #if LASP_DEBUG == 1
 void StreamMgr::checkRightThread() const {
-  assert(std::this_thread::get_id() == _main_thread_id);
+  assert(std::this_thread::get_id() == main_thread_id);
 }
 #endif
 
 void StreamMgr::rescanDAQDevices(bool background,
                                  std::function<void()> callback) {
   DEBUGTRACE_ENTER;
-  auto &pool = getPool();
-
-  checkRightThread();
-  if (!_devices_mtx.try_lock()) {
-    throw rte("A background DAQ device scan is probably already running");
+  DEBUGTRACE_PRINT(background);
+  if (_scanningDevices) {
+    throw rte("A background device scan is already busy");
   }
-  _devices_mtx.unlock();
 
+  Lck lck(_mtx);
+  checkRightThread();
   if (_inputStream || _outputStream) {
     throw rte("Rescanning DAQ devices only possible when no stream is running");
   }
+
   _devices.clear();
-  /* auto &pool = getPool(); */
   if (!background) {
+    _scanningDevices = true;
     rescanDAQDevices_impl(callback);
   } else {
-    pool.push_task(&StreamMgr::rescanDAQDevices_impl, this, callback);
+    DEBUGTRACE_PRINT("Rescanning DAQ devices on different thread...");
+    _scanningDevices = true;
+    _pool.push_task(&StreamMgr::rescanDAQDevices_impl, this, callback);
   }
 }
 void StreamMgr::rescanDAQDevices_impl(std::function<void()> callback) {
   DEBUGTRACE_ENTER;
-  std::scoped_lock lck(_devices_mtx);
-  _devices = DeviceInfo::getDeviceInfo();
+  assert(!_inputStream && !_outputStream);
+  Lck lck(_mtx);
+  // Alsa spits out annoying messages that are not useful
+  {
+
+    _devices = DeviceInfo::getDeviceInfo();
+  }
   if (callback) {
     callback();
   }
-}
-bool StreamMgr::inCallback(const DaqData &data) {
 
+  _scanningDevices = false;
+}
+void StreamMgr::inCallback(const DaqData &data) {
   DEBUGTRACE_ENTER;
 
-  std::scoped_lock<std::mutex> lck(_inDataHandler_mtx);
+  Lck lck(_mtx);
 
   assert(_inputFilters.size() == data.nchannels);
 
   if (std::count_if(_inputFilters.cbegin(), _inputFilters.cend(),
                     [](const auto &a) { return bool(a); }) > 0) {
-
     /// Found a filter in vector of input filters. So we have to apply the
     /// filters to each channel.
 
@@ -117,33 +150,24 @@ bool StreamMgr::inCallback(const DaqData &data) {
       }
     }
 
+    DEBUGTRACE_PRINT("Calling incallback for handlers (filtered)...");
     for (auto &handler : _inDataHandlers) {
-      bool res = handler->inCallback(input_filtered);
-      if (!res) {
-        return false;
-      }
+      handler->inCallback(input_filtered);
     }
-
   } else {
     /// No input filters
+    DEBUGTRACE_PRINT("Calling incallback for handlers...");
     for (auto &handler : _inDataHandlers) {
-
-      bool res = handler->inCallback(data);
-      if (!res) {
-        return false;
-      }
+      handler->inCallback(data);
     }
   }
-  return true;
 }
 
 void StreamMgr::setSiggen(std::shared_ptr<Siggen> siggen) {
-
   DEBUGTRACE_ENTER;
   checkRightThread();
 
-  std::scoped_lock<std::mutex> lck(_siggen_mtx);
-
+  Lck lck(_mtx);
   // If not set to nullptr, and a stream is running, we update the signal
   // generator by resetting it.
   if (isStreamRunningOK(StreamType::output) && siggen) {
@@ -166,7 +190,8 @@ void StreamMgr::setSiggen(std::shared_ptr<Siggen> siggen) {
  *
  * @return
  */
-template <typename T> bool fillData(DaqData &data, const vd &signal) {
+template <typename T>
+bool fillData(DaqData &data, const vd &signal) {
   /* DEBUGTRACE_ENTER; */
   assert(data.nframes == signal.size());
 
@@ -198,81 +223,100 @@ template <typename T> bool fillData(DaqData &data, const vd &signal) {
 
   return true;
 }
-bool StreamMgr::outCallback(DaqData &data) {
+void StreamMgr::outCallback(DaqData &data) {
+  DEBUGTRACE_ENTER;
 
-  /* DEBUGTRACE_ENTER; */
-
-  std::scoped_lock<std::mutex> lck(_siggen_mtx);
+  Lck lck(_mtx);
 
   if (_siggen) {
     vd signal = _siggen->genSignal(data.nframes);
     switch (data.dtype) {
-    case (DataTypeDescriptor::DataType::dtype_fl32):
-      fillData<float>(data, signal);
-      break;
-    case (DataTypeDescriptor::DataType::dtype_fl64):
-      fillData<double>(data, signal);
-      break;
-    case (DataTypeDescriptor::DataType::dtype_int8):
-      fillData<int8_t>(data, signal);
-      break;
-    case (DataTypeDescriptor::DataType::dtype_int16):
-      fillData<int16_t>(data, signal);
-      break;
-    case (DataTypeDescriptor::DataType::dtype_int32):
-      fillData<int32_t>(data, signal);
-      break;
+      case (DataTypeDescriptor::DataType::dtype_fl32):
+        fillData<float>(data, signal);
+        break;
+      case (DataTypeDescriptor::DataType::dtype_fl64):
+        fillData<double>(data, signal);
+        break;
+      case (DataTypeDescriptor::DataType::dtype_int8):
+        fillData<int8_t>(data, signal);
+        break;
+      case (DataTypeDescriptor::DataType::dtype_int16):
+        fillData<int16_t>(data, signal);
+        break;
+      case (DataTypeDescriptor::DataType::dtype_int32):
+        fillData<int32_t>(data, signal);
+        break;
     }
   } else {
     // Set all values to 0.
     std::fill(data.raw_ptr(), data.raw_ptr() + data.size_bytes(), 0);
   }
-  return true;
 }
 
 StreamMgr::~StreamMgr() {
   DEBUGTRACE_ENTER;
-  checkRightThread();
-  stopAllStreams();
-  if (!_inDataHandlers.empty()) {
-    cerr << "*** WARNING: InDataHandlers have not been all stopped, while "
-            "StreamMgr destructor is called. This is a misuse BUG"
-         << endl;
-    abort();
+  while (_scanningDevices) {
+    std::this_thread::sleep_for(10us);
   }
+
+#if LASP_DEBUG == 1
+  {  // Careful, this lock needs to be released to make sure the streams can
+    // obtain a lock to the stream manager.
+    Lck lck(_mtx);
+    checkRightThread();
+  }
+#endif
+  // Stream manager now handled by shared pointer. Each indata handler gets a
+  // shared pointer to the stream manager, and stores a weak pointer to it.
+  // Hence, we do not have to do any cleanup here. It also makes sure that the
+  // order in which destructors are called does not matter anymore. As soon as
+  // the stream manager is destructed, the weak pointers loose there ref, and do
+  // not have to removeInDataHandler() anymore.
+
+  // Stop the streams in this phase, otherwise it might happen during the
+  // destruction of the Siggen, in which case we might get calls to pure
+  // virtual methods. This was really a bug.
+  _inputStream.reset();
+  _outputStream.reset();
 }
 void StreamMgr::stopAllStreams() {
   DEBUGTRACE_ENTER;
-  checkRightThread();
+  {
+    Lck lck(_mtx);
+    checkRightThread();
+  }
+  // No lock here!
   _inputStream.reset();
   _outputStream.reset();
 }
 
 void StreamMgr::startStream(const DaqConfiguration &config) {
   DEBUGTRACE_ENTER;
+  if (_scanningDevices) {
+    throw rte("DAQ device scan is busy. Cannot start stream.");
+  }
+  Lck lck(_mtx);
   checkRightThread();
 
   bool isInput = std::count_if(config.inchannel_config.cbegin(),
                                config.inchannel_config.cend(),
-                               [](auto &i) { return i.enabled; });
+                               [](auto &i) { return i.enabled; }) > 0;
 
   bool isOutput = std::count_if(config.outchannel_config.cbegin(),
                                 config.outchannel_config.cend(),
-                                [](auto &i) { return i.enabled; });
+                                [](auto &i) { return i.enabled; }) > 0;
 
   // Find the first device that matches with the configuration
-  std::scoped_lock lck(_devices_mtx);
-
   DeviceInfo *devinfo = nullptr;
-  bool found = false;
 
+  // Match configuration to a device in the list of devices
   for (auto &devinfoi : _devices) {
     if (config.match(*devinfoi)) {
       devinfo = devinfoi.get();
       break;
     }
   }
-  if (!devinfo) {
+  if (devinfo == nullptr) {
     throw rte("Could not find a device with name " + config.device_name +
               " in list of devices.");
   }
@@ -283,34 +327,40 @@ void StreamMgr::startStream(const DaqConfiguration &config) {
   bool isDuplex = isInput && isOutput;
 
   if (!isInput && !isOutput) {
-    throw rte("Neither input, nor output channels enabled for "
-              "stream. Cannot start.");
+    throw rte(
+        "Attempted stream start failed, stream does not have any enabled "
+        "channels. Please first enable channels in the channel configuration.");
   }
 
   if (isInput && _inputStream) {
-    throw rte("Error: an input stream is already running. Please "
-              "first stop existing stream");
+    throw rte(
+        "Error: an input stream is already running. Please "
+        "first stop existing stream");
   } else if (isOutput && _outputStream) {
-    throw rte("Error: output stream is already running. Please "
-              "first stop existing stream");
+    throw rte(
+        "Error: output stream is already running. Please "
+        "first stop existing stream");
   } else if (_inputStream) {
     if (_inputStream->duplexMode() && isOutput) {
-      throw rte("Error: output stream is already running (in duplex mode). "
-                "Please "
-                "first stop existing stream");
+      throw rte(
+          "Error: output stream is already running (in duplex mode). "
+          "Please "
+          "first stop existing stream");
     }
   }
 
   if (_outputStream && isInput && _outputStream->duplexModeForced &&
       config.match(*_outputStream)) {
-    throw rte("This device is already opened for output. If input is also "
-              "required, please enable duplex mode for this device");
+    throw rte(
+        "This device is already opened for output. If input is also "
+        "required, please enable duplex mode for this device");
   }
 
   if (_inputStream && isOutput && _inputStream->duplexModeForced &&
       config.match(*_inputStream)) {
-    throw rte("This device is already opened for input. If output is also "
-              "required, please enable duplex mode for this device");
+    throw rte(
+        "This device is already opened for input. If output is also "
+        "required, please enable duplex mode for this device");
   }
 
   InDaqCallback inCallback;
@@ -333,10 +383,13 @@ void StreamMgr::startStream(const DaqConfiguration &config) {
     d fs = daq->samplerate();
     /// Create input filters
     _inputFilters.clear();
-    /// No input filter for monitor channel.
+
+    /// No input filter for monitor channel, which comes as the first input
+    /// channel In the list
     if (config.monitorOutput && devinfo->hasInternalOutputMonitor) {
       _inputFilters.push_back(nullptr);
     }
+
     for (auto &ch : daq->inchannel_config) {
       if (ch.enabled) {
         if (ch.digitalHighPassCutOn < 0) {
@@ -349,7 +402,7 @@ void StreamMgr::startStream(const DaqConfiguration &config) {
               SeriesBiquad::firstOrderHighPass(fs, ch.digitalHighPassCutOn)));
         }
       }
-    } // End of input filter creation
+    }  // End of input filter creation
   }
 
   if (isOutput) {
@@ -376,61 +429,76 @@ void StreamMgr::startStream(const DaqConfiguration &config) {
   }
 }
 void StreamMgr::stopStream(const StreamType t) {
-
   DEBUGTRACE_ENTER;
   checkRightThread();
+  bool resetHandlers = false;
+  std::unique_ptr<Daq> *streamToStop = nullptr;
 
-  if (t == StreamType::input) {
-    if (!_inputStream) {
-      throw rte("Input stream is not running");
+  {  // Mutex locked in this scope
+    Lck lck(_mtx);
+    if (t == StreamType::input) {
+      if (!_inputStream) {
+        throw rte("Input stream is not running");
+      }
+      streamToStop = std::addressof(_inputStream);
+      resetHandlers = true;
+    } else {
+      /// t == output
+      /// Kill input stream in case that one is a duplex stream
+      if (_inputStream && _inputStream->duplexMode()) {
+        streamToStop = std::addressof(_inputStream);
+      } else {
+        if (!_outputStream) {
+          throw rte("Output stream is not running");
+        }
+        streamToStop = std::addressof(_outputStream);
+      }  // end else
     }
-    /// Kills input stream
-    _inputStream.reset();
-    /// Send reset to all in data handlers
+  }  // End of mutex lock. When stopping stream, mutex should be unlocked.
+
+  // If we arrive here, we should have a stream to stop.
+  assert(streamToStop != nullptr);
+  streamToStop->reset();
+
+  /// Send reset to all in data handlers
+  if (resetHandlers) {
+    Lck lck(_mtx);
     for (auto &handler : _inDataHandlers) {
       handler->reset(nullptr);
     }
-  } else {
-    /// t == output
-
-    /// Kill input stream in case that one is a duplex stream
-    if (_inputStream && _inputStream->duplexMode()) {
-      _inputStream.reset();
-    } else {
-      if (!_outputStream) {
-        throw rte("Output stream is not running");
-      }
-      _outputStream.reset();
-    } // end else
   }
 }
 
-void StreamMgr::addInDataHandler(InDataHandler &handler) {
+void StreamMgr::addInDataHandler(InDataHandler *handler) {
   DEBUGTRACE_ENTER;
+  Lck lck(_mtx);
   checkRightThread();
-  std::scoped_lock<std::mutex> lck(_inDataHandler_mtx);
-  if (_inputStream) {
-    handler.reset(_inputStream.get());
-  } else {
-    handler.reset(nullptr);
-  }
-  if (std::find(_inDataHandlers.cbegin(), _inDataHandlers.cend(), &handler) !=
+  assert(handler);
+  handler->reset(_inputStream.get());
+
+  if (std::find(_inDataHandlers.cbegin(), _inDataHandlers.cend(), handler) !=
       _inDataHandlers.cend()) {
-    throw std::runtime_error("Error: handler already added. Probably start() "
-                             "is called more than once on a handler object");
+    throw std::runtime_error(
+        "Error: handler already added. Probably start() "
+        "is called more than once on a handler object");
   }
-  _inDataHandlers.push_back(&handler);
+  _inDataHandlers.push_back(handler);
+  DEBUGTRACE_PRINT(_inDataHandlers.size());
 }
+
 void StreamMgr::removeInDataHandler(InDataHandler &handler) {
   DEBUGTRACE_ENTER;
-  checkRightThread();
-  std::scoped_lock<std::mutex> lck(_inDataHandler_mtx);
+  Lck lck(_mtx);
+  // checkRightThread();
   _inDataHandlers.remove(&handler);
+
+  DEBUGTRACE_PRINT(_inDataHandlers.size());
 }
 
 Daq::StreamStatus StreamMgr::getStreamStatus(const StreamType type) const {
-  /* DEBUGTRACE_ENTER; */
+  DEBUGTRACE_ENTER;
 
+  Lck lck(_mtx);
   checkRightThread();
   // Default constructor, says stream is not running, but also no errors
 
@@ -443,7 +511,7 @@ Daq::StreamStatus StreamMgr::getStreamStatus(const StreamType type) const {
 }
 
 const Daq *StreamMgr::getDaq(StreamType type) const {
-
+  Lck lck(_mtx);
   checkRightThread();
 
   if (type == StreamType::input) {

cpp_src/device/lasp_streammgr.h

@@ -1,69 +1,18 @@
 #pragma once
-#include "lasp_daq.h"
-#include "lasp_siggen.h"
 #include <list>
 #include <memory>
 #include <mutex>
 #include <thread>
 
+#include "lasp_daq.h"
+#include "lasp_siggen.h"
+#include "lasp_thread.h"
+
 /** \addtogroup device
  * @{
  */
 class StreamMgr;
-
-class InDataHandler {
-
-protected:
-  StreamMgr &_mgr;
-#if LASP_DEBUG == 1
-  std::atomic<bool> stopCalled{false};
-#endif
-
-public:
-  virtual ~InDataHandler();
-
-  /**
-   * @brief When constructed, the handler is added to the stream manager, which
-   * will call the handlers's inCallback() until stop() is called.
-   *
-   * @param mgr Stream manager.
-   */
-  InDataHandler(StreamMgr &mgr);
-
-  /**
-   * @brief This function is called when input data from a DAQ is available.
-   *
-   * @param daqdata Input data from DAQ
-   *
-   * @return true if no error. False to stop the stream from running.
-   */
-  virtual bool inCallback(const DaqData &daqdata) = 0;
-
-  /**
-   * @brief Reset in-data handler.
-   *
-   * @param daq New DAQ configuration of inCallback(). If nullptr is given,
-   * it means that the stream is stopped.
-   */
-  virtual void reset(const Daq *daq = nullptr) = 0;
-
-  /**
-   * @brief This function should be called from the constructor of the
-   * implementation of InDataHandler. It will start the stream's calling of
-   * inCallback().
-   */
-  void start();
-
-  /**
-   * @brief This function should be called from the destructor of derived
-   * classes, to disable the calls to inCallback(), such that proper
-   * destruction of the object is allowed and no other threads call methods
-   * from the object. It removes the inCallback() from the callback list of the
-   * StreamMgr(). **Failing to call this function results in deadlocks, errors
-   * like "pure virtual function called", or other**.
-   */
-  void stop();
-};
+class InDataHandler;
 
 class SeriesBiquad;
 
@@ -76,22 +25,23 @@ class SeriesBiquad;
  * fact is asserted.
  */
 class StreamMgr {
-#if LASP_DEBUG == 1
-  std::thread::id _main_thread_id;
-#endif
+  mutable std::recursive_mutex _mtx;
 
   /**
    * @brief Storage for streams.
    */
   std::unique_ptr<Daq> _inputStream, _outputStream;
 
+  std::atomic<bool> _scanningDevices{false};
+
+  GlobalThreadPool _pool;
+
   /**
    * @brief All indata handlers are called when input data is available. Note
    * that they can be called from different threads and should take care of
    * thread-safety.
    */
   std::list<InDataHandler *> _inDataHandlers;
-  std::mutex _inDataHandler_mtx;
 
   /**
    * @brief Signal generator in use to generate output data. Currently
@@ -104,20 +54,21 @@ class StreamMgr {
    */
   std::vector<std::unique_ptr<SeriesBiquad>> _inputFilters;
 
-  std::mutex _siggen_mtx;
-
-  std::mutex _devices_mtx;
+  /**
+   * @brief Current storage for the device list
+   */
   DeviceInfoList _devices;
 
+  // Singleton, no public constructor. Can only be obtained using
+  // getInstance();
   StreamMgr();
 
   friend class InDataHandler;
   friend class Siggen;
 
-  // Singleton, no public destructor
+ public:
   ~StreamMgr();
 
-  public:
   enum class StreamType : us {
     /**
      * @brief Input stream
@@ -137,7 +88,7 @@ class StreamMgr {
    *
    * @return Reference to stream manager.
    */
-  static StreamMgr &getInstance();
+  static std::shared_ptr<StreamMgr> getInstance();
 
   /**
    * @brief Obtain a list of devices currently available. When the StreamMgr is
@@ -146,9 +97,10 @@ class StreamMgr {
    * @return A copy of the internal stored list of devices
    */
   DeviceInfoList getDeviceInfo() const {
-    std::scoped_lock lck(const_cast<std::mutex &>(_devices_mtx));
+    std::scoped_lock lck(_mtx);
     DeviceInfoList d2;
-    for(const auto& dev: _devices) {
+    for (const auto &dev : _devices) {
+      assert(dev != nullptr);
       d2.push_back(dev->clone());
     }
     return d2;
@@ -157,15 +109,16 @@ class StreamMgr {
   /**
    * @brief Triggers a background scan of the DAQ devices, which updates the
    * internally stored list of devices. Throws a runtime error when a
-   * background thread is already scanning for devices.
+   * background thread is already scanning for devices, or if a stream is
+   * running.
    *
    * @param background Perform searching for DAQ devices in the background. If
    * set to true, the function returns immediately.
    * @param callback Function to call when complete.
    */
-  void
-  rescanDAQDevices(bool background = false,
-                   std::function<void()> callback = std::function<void()>());
+  void rescanDAQDevices(
+      bool background = false,
+      std::function<void()> callback = std::function<void()>());
 
   /**
    * @brief Start a stream based on given configuration.
@@ -186,12 +139,12 @@ class StreamMgr {
   }
   bool isStreamRunning(const StreamType type) const {
     switch (type) {
-    case (StreamType::input):
-      return bool(_inputStream);
-      break;
-    case (StreamType::output):
-      return bool(_outputStream);
-      break;
+      case (StreamType::input):
+        return bool(_inputStream);
+        break;
+      case (StreamType::output):
+        return bool(_outputStream);
+        break;
     }
     return false;
   }
@@ -231,17 +184,16 @@ class StreamMgr {
   /**
    * @brief Set active signal generator for output streams. Only one `Siggen'
    * is active at the same time. Siggen controls its own data race protection
-   * using a mutex.
+   * using a mutex. If no Siggen is there, and an output stream is running, it
+   * will send a default signal of 0.
    *
    * @param s New Siggen pointer
    */
   void setSiggen(std::shared_ptr<Siggen> s);
 
-private:
-  bool inCallback(const DaqData &data);
-  bool outCallback(DaqData &data);
-
-  void removeInDataHandler(InDataHandler &handler);
+ private:
+  void inCallback(const DaqData &data);
+  void outCallback(DaqData &data);
 
   /**
    * @brief Add an input data handler. The handler's inCallback() function is
@@ -251,8 +203,14 @@ private:
    *
    * @param handler The handler to add.
    */
-  void addInDataHandler(InDataHandler &handler);
+  void addInDataHandler(InDataHandler *handler);
 
+  /**
+   * @brief Remove InDataHandler from the list.
+   *
+   * @param handler
+   */
+  void removeInDataHandler(InDataHandler &handler);
   /**
    * @brief Do the actual rescanning.
    *
@@ -261,6 +219,7 @@ private:
   void rescanDAQDevices_impl(std::function<void()> callback);
 
 #if LASP_DEBUG == 1
+  const std::thread::id main_thread_id;
   void checkRightThread() const;
 #else
   void checkRightThread() const {}

cpp_src/device/lasp_uldaq.cpp

@@ -1,18 +1,22 @@
 /* #define DEBUGTRACE_ENABLED */
 #include "debugtrace.hpp"
 #include "lasp_config.h"
+
 #if LASP_HAS_ULDAQ == 1
 #include "lasp_uldaq.h"
 #include "lasp_uldaq_impl.h"
 #include <uldaq.h>
 
-
+/**
+ * @brief The maximum number of devices that can be enumerated when calling
+ * ulGetDaqDeviceInventory()
+ */
+const us MAX_ULDAQ_DEV_COUNT_PER_API = 100;
 
 void fillUlDaqDeviceInfo(DeviceInfoList &devinfolist) {
 
   DEBUGTRACE_ENTER;
 
-
   UlError err;
   unsigned int numdevs = MAX_ULDAQ_DEV_COUNT_PER_API;
 
@@ -20,13 +24,13 @@ void fillUlDaqDeviceInfo(DeviceInfoList &devinfolist) {
   DaqDeviceDescriptor descriptor;
   DaqDeviceInterface interfaceType = ANY_IFC;
 
-  err = ulGetDaqDeviceInventory(interfaceType, devdescriptors,
-                                static_cast<unsigned *>(&numdevs));
+  err = ulGetDaqDeviceInventory(interfaceType, devdescriptors, &numdevs);
 
   if (err != ERR_NO_ERROR) {
     throw rte("UlDaq device inventarization failed");
   }
 
+  DEBUGTRACE_PRINT(string("Number of devices: ") + std::to_string(numdevs));
   for (unsigned i = 0; i < numdevs; i++) {
 
     descriptor = devdescriptors[i];
@@ -35,48 +39,50 @@ void fillUlDaqDeviceInfo(DeviceInfoList &devinfolist) {
     devinfo._uldaqDescriptor = descriptor;
 
     devinfo.api = uldaqapi;
-    string name, interface;
-    string productname = descriptor.productName;
-    if (productname != "DT9837A") {
-      throw rte("Unknown UlDAQ type: " + productname);
+    {
+      string name;
+      string productname = descriptor.productName;
+      if (productname != "DT9837A") {
+        throw rte("Unknown UlDAQ type: " + productname);
+      }
+
+      switch (descriptor.devInterface) {
+      case USB_IFC:
+        name = "USB - ";
+        break;
+      case BLUETOOTH_IFC:
+        /* devinfo. */
+        name = "Bluetooth - ";
+        break;
+
+      case ETHERNET_IFC:
+        /* devinfo. */
+        name = "Ethernet - ";
+        break;
+      default:
+        name = "Uknown interface = ";
+      }
+
+      name += productname + " " + string(descriptor.uniqueId);
+      devinfo.device_name = name;
     }
 
-    switch (descriptor.devInterface) {
-    case USB_IFC:
-      name = "USB - ";
-      break;
-    case BLUETOOTH_IFC:
-      /* devinfo. */
-      name = "Bluetooth - ";
-      break;
-
-    case ETHERNET_IFC:
-      /* devinfo. */
-      name = "Ethernet - ";
-      break;
-    default:
-      name = "Uknown interface = ";
-    }
-
-    name += string(descriptor.productName) + " " + string(descriptor.uniqueId);
-    devinfo.device_name = std::move(name);
-
     devinfo.physicalOutputQty = DaqChannel::Qty::Voltage;
+    devinfo.physicalInputQty = DaqChannel::Qty::Voltage;
 
     devinfo.availableDataTypes.push_back(
         DataTypeDescriptor::DataType::dtype_fl64);
     devinfo.prefDataTypeIndex = 0;
 
-    devinfo.availableSampleRates = {8000,  10000, 11025, 16000, 20000,
-                                    22050, 24000, 32000, 44056, 44100,
-                                    47250, 48000, 50000, 50400, 51000};
-
+    devinfo.availableSampleRates = ULDAQ_SAMPLERATES;
     devinfo.prefSampleRateIndex = 11;
 
     devinfo.availableFramesPerBlock = {512, 1024, 2048, 4096, 8192};
 
     devinfo.availableInputRanges = {1.0, 10.0};
+    devinfo.availableOutputRanges = {10.0};
     devinfo.prefInputRangeIndex = 0;
+    devinfo.prefOutputRangeIndex = 0;
 
     devinfo.ninchannels = 4;
     devinfo.noutchannels = 1;
@@ -87,6 +93,7 @@ void fillUlDaqDeviceInfo(DeviceInfoList &devinfolist) {
 
     devinfo.hasInternalOutputMonitor = true;
 
+    devinfo.hasDuplexMode = true;
     devinfo.duplexModeForced = true;
 
     // Finally, this devinfo is pushed back in list
@@ -96,7 +103,12 @@ void fillUlDaqDeviceInfo(DeviceInfoList &devinfolist) {
 
 std::unique_ptr<Daq> createUlDaqDevice(const DeviceInfo &devinfo,
                                        const DaqConfiguration &config) {
-  return std::make_unique<DT9837A>(devinfo, config);
+  const UlDaqDeviceInfo *_info =
+      dynamic_cast<const UlDaqDeviceInfo *>(&devinfo);
+  if (_info == nullptr) {
+    throw rte("BUG: Could not cast DeviceInfo to UlDaqDeviceInfo");
+  }
+  return std::make_unique<DT9837A>(*_info, config);
 }
 
 #endif // LASP_HAS_ULDAQ

cpp_src/device/lasp_uldaq.h

@@ -1,18 +1,24 @@
 #pragma once
 #include "lasp_daq.h"
 
-/**
- * @brief The maximum number of devices that can be enumerated when calling
- * ulGetDaqDeviceInventory()
+/** \addtogroup device
+ * \defgroup uldaq UlDAQ specific code
+ * This code is used to interface with UlDAQ compatible devices. It is only
+ * tested on Linux.
+ * @{
+ * \addtogroup uldaq
+ * @{
  */
-const us MAX_ULDAQ_DEV_COUNT_PER_API = 100;
 
 std::unique_ptr<Daq> createUlDaqDevice(const DeviceInfo &devinfo,
                                        const DaqConfiguration &config);
 
 /**
- * @brief Fill device info list with UlDaq specific devices, if any.
+ * @brief Append device info list with UlDaq specific devices, if any.
  *
  * @param devinfolist Info list to append to.
  */
 void fillUlDaqDeviceInfo(DeviceInfoList& devinfolist);
+
+/** @} */
+/** @} */

cpp_src/device/portaudio/lasp_portaudiodaq.cpp

@@ -0,0 +1,561 @@
+// #define DEBUGTRACE_ENABLED
+#include "debugtrace.hpp"
+#include "lasp_config.h"
+
+#if LASP_HAS_PORTAUDIO == 1
+#include <gsl-lite/gsl-lite.hpp>
+#include <mutex>
+#include <string>
+
+#include "lasp_portaudiodaq.h"
+#include "portaudio.h"
+
+using rte = std::runtime_error;
+using std::cerr;
+using std::endl;
+using std::string;
+using std::to_string;
+
+#if LASP_HAS_PA_ALSA
+#include <alsa/asoundlib.h>
+void empty_handler(const char *file, int line, const char *function, int err,
+                   const char *fmt, ...) {
+
+                    // cerr << "Test empty error handler...\n";
+                   }
+
+// Temporarily set the ALSA eror handler to something that does nothing, to
+// prevent ALSA from spitting out all kinds of misconfiguration errors.
+class MuteErrHandler {
+ private:
+  snd_lib_error_handler_t _default_handler;
+
+ public:
+  explicit MuteErrHandler() {
+    _default_handler = snd_lib_error;
+    snd_lib_error_set_handler(empty_handler);
+  }
+
+  ~MuteErrHandler() { snd_lib_error_set_handler(_default_handler); }
+};
+#else
+// Does nothin in case of no ALSA
+class MuteErrHandler {};
+#endif
+
+inline void throwIfError(PaError e) {
+  DEBUGTRACE_ENTER;
+  if (e != paNoError) {
+    throw rte(string("PortAudio backend error: ") + Pa_GetErrorText(e));
+  }
+}
+
+/**
+ * @brief Device info, plus PortAudio stuff
+ */
+class OurPaDeviceInfo : public DeviceInfo {
+ public:
+  /**
+   * @brief Store instance to PaDeviceInfo.
+   */
+  PaDeviceInfo _paDevInfo;
+
+  virtual std::unique_ptr<DeviceInfo> clone() const override final {
+    return std::make_unique<OurPaDeviceInfo>(*this);
+  }
+  OurPaDeviceInfo &operator=(const OurPaDeviceInfo &) = delete;
+  OurPaDeviceInfo(const OurPaDeviceInfo &) = default;
+  OurPaDeviceInfo(const PaDeviceInfo &o) : DeviceInfo(), _paDevInfo(o) {}
+};
+
+void fillPortAudioDeviceInfo(DeviceInfoList &devinfolist) {
+  DEBUGTRACE_ENTER;
+  bool shouldPaTerminate = false;
+  MuteErrHandler guard;
+  try {
+    PaError err = Pa_Initialize();
+    /// PortAudio says that Pa_Terminate() should not be called whenever there
+    /// is an error in Pa_Initialize(). This is opposite to what most examples
+    /// of PortAudio show.
+    throwIfError(err);
+    shouldPaTerminate = true;
+
+    auto fin = gsl::finally([&err] {
+      DEBUGTRACE_PRINT("Terminating PortAudio instance");
+      err = Pa_Terminate();
+      if (err != paNoError) {
+        cerr << "Error terminating PortAudio. Do not know what to do." << endl;
+      }
+    });
+
+    const PaHostApiIndex apicount = Pa_GetHostApiCount();
+    if (apicount < 0) {
+      return;
+    }
+    /* const PaDeviceInfo *deviceInfo; */
+    const int numDevices = Pa_GetDeviceCount();
+    if (numDevices < 0) {
+      throw rte("PortAudio could not find any devices");
+    }
+    for (us i = 0; i < (us)numDevices; i++) {
+      /* DEBUGTRACE_PRINT(i); */
+      bool hasDuplexMode = false;
+
+      const PaDeviceInfo *deviceInfo = Pa_GetDeviceInfo(i);
+      if (!deviceInfo) {
+        throw rte("No device info struct returned");
+      }
+      OurPaDeviceInfo d(*deviceInfo);
+      // We store the name in d.device_name
+      d._paDevInfo.name = nullptr;
+      d.device_name = deviceInfo->name;
+
+      const PaHostApiInfo *hostapiinfo = Pa_GetHostApiInfo(deviceInfo->hostApi);
+      if (hostapiinfo == nullptr) {
+        throw std::runtime_error("Hostapi nullptr!");
+      }
+      switch (hostapiinfo->type) {
+        case paALSA:
+        // Duplex mode for alsa
+          hasDuplexMode = true;
+          d.api = portaudioALSAApi;
+          break;
+        case paASIO:
+          hasDuplexMode = true;
+          d.api = portaudioASIOApi;
+          break;
+        case paDirectSound:
+          d.api = portaudioDirectSoundApi;
+          break;
+        case paMME:
+          d.api = portaudioWMMEApi;
+          break;
+        case paWDMKS:
+          d.api = portaudioWDMKS;
+          break;
+        case paWASAPI:
+          d.api = portaudioWASAPIApi;
+          break;
+        case paPulseAudio:
+          d.api = portaudioPulseApi;
+          break;
+        default:
+          throw rte("Unimplemented portaudio API!");
+          break;
+      }
+
+      d.availableDataTypes = {DataTypeDescriptor::DataType::dtype_int16,
+                              DataTypeDescriptor::DataType::dtype_int32,
+                              DataTypeDescriptor::DataType::dtype_fl32};
+
+      d.prefDataTypeIndex = 2;
+
+      d.availableSampleRates = {8000.0,  9600.0,  11025.0, 12000.0, 16000.0,
+                                22050.0, 24000.0, 32000.0, 44100.0, 48000.0,
+                                88200.0, 96000.0, 192000.0};
+      d.prefSampleRateIndex = 9;
+
+      d.availableFramesPerBlock = {512, 1024, 2048, 4096, 8192};
+      d.prefFramesPerBlockIndex = 2;
+
+      d.availableInputRanges = {1.0};
+      // d.prefInputRangeIndex = 0; // Constructor-defined
+      d.availableOutputRanges = {1.0};
+      // d.prefOutputRangeIndex = 0; // Constructor-defined
+
+      d.ninchannels = deviceInfo->maxInputChannels;
+      d.noutchannels = deviceInfo->maxOutputChannels;
+
+      // Duplex mode, only for ALSA devices
+      d.hasDuplexMode = hasDuplexMode;
+
+      devinfolist.push_back(std::make_unique<OurPaDeviceInfo>(d));
+    }
+  }
+
+  catch (rte &e) {
+    if (shouldPaTerminate) {
+      PaError err = Pa_Terminate();
+      if (err != paNoError) {
+        cerr << "Error terminating PortAudio. Do not know what to do." << endl;
+      }
+    }
+    cerr << "PortAudio backend error: " << e.what() << std::endl;
+    return;
+  }
+}
+
+/**
+ * @brief Forward declaration of raw callback. Calls into
+ * PortAudioDaq->memberPaCallback. Undocumented parameters are specified
+ * in memberPaCallback
+ *
+ * @param inputBuffer
+ * @param outputBuffer
+ * @param framesPerBuffer
+ * @param timeInfo
+ * @param statusFlags
+ * @param userData Pointer to PortAudioDaq* instance.
+ *
+ * @return
+ */
+static int rawPaCallback(const void *inputBuffer, void *outputBuffer,
+                         unsigned long framesPerBuffer,
+                         const PaStreamCallbackTimeInfo *timeInfo,
+                         PaStreamCallbackFlags statusFlags, void *userData);
+
+class PortAudioDaq : public Daq {
+  PaStream *_stream = nullptr;
+  std::atomic<StreamStatus::StreamError> _streamError =
+      StreamStatus::StreamError::noError;
+  InDaqCallback _incallback;
+  OutDaqCallback _outcallback;
+
+ public:
+  PortAudioDaq(const OurPaDeviceInfo &devinfo_gen,
+               const DaqConfiguration &config);
+
+  void start(InDaqCallback inCallback,
+             OutDaqCallback outCallback) override final;
+  void stop() override final;
+
+  StreamStatus getStreamStatus() const override final;
+
+  /**
+   * @brief Member va
+   *
+   * @param inputBuffer
+   * @param outputBuffer
+   * @param framesPerBuffer
+   * @param timeInfo
+   * @param statusFlags
+   *
+   * @return
+   */
+  int memberPaCallback(const void *inputBuffer, void *outputBuffer,
+                       unsigned long framesPerBuffer,
+                       const PaStreamCallbackTimeInfo *timeInfo,
+                       PaStreamCallbackFlags statusFlags);
+  ~PortAudioDaq();
+};
+
+std::unique_ptr<Daq> createPortAudioDevice(const DeviceInfo &devinfo,
+                                           const DaqConfiguration &config) {
+  DEBUGTRACE_ENTER;
+  const OurPaDeviceInfo *_info =
+      dynamic_cast<const OurPaDeviceInfo *>(&devinfo);
+  if (_info == nullptr) {
+    throw rte("BUG: Could not cast DeviceInfo to OurPaDeviceInfo");
+  }
+  return std::make_unique<PortAudioDaq>(*_info, config);
+}
+
+static int rawPaCallback(const void *inputBuffer, void *outputBuffer,
+                         unsigned long framesPerBuffer,
+                         const PaStreamCallbackTimeInfo *timeInfo,
+                         PaStreamCallbackFlags statusFlags, void *userData) {
+  return static_cast<PortAudioDaq *>(userData)->memberPaCallback(
+      inputBuffer, outputBuffer, framesPerBuffer, timeInfo, statusFlags);
+}
+
+PortAudioDaq::PortAudioDaq(const OurPaDeviceInfo &devinfo_gen,
+                           const DaqConfiguration &config)
+    : Daq(devinfo_gen, config) {
+  DEBUGTRACE_ENTER;
+  bool shouldPaTerminate = false;
+  try {
+    PaError err = Pa_Initialize();
+    /// PortAudio says that Pa_Terminate() should not be called whenever there
+    /// is an error in Pa_Initialize(). This is opposite to what most examples
+    /// of PortAudio show.
+    throwIfError(err);
+
+    // OK, Pa_Initialize successfully finished, it means we have to clean up
+    // with Pa_Terminate in the destructor.
+    shouldPaTerminate = true;
+
+    // Going to find the device in the list. If its there, we have to retrieve
+    // the index, as this is required in the PaStreamParameters struct
+    int devindex = -1;
+    for (int i = 0; i < Pa_GetDeviceCount(); i++) {
+      // DEBUGTRACE_PRINT(i);
+      bool ok = true;
+      const PaDeviceInfo *info = Pa_GetDeviceInfo(i);
+      if (!info) {
+        throw rte("No device structure returned from PortAudio");
+      }
+      ok &= string(info->name) == devinfo_gen.device_name;
+      ok &= info->hostApi == devinfo_gen._paDevInfo.hostApi;
+      ok &= info->maxInputChannels == devinfo_gen._paDevInfo.maxInputChannels;
+      ok &= info->maxOutputChannels == devinfo_gen._paDevInfo.maxOutputChannels;
+      ok &= info->defaultSampleRate == devinfo_gen._paDevInfo.defaultSampleRate;
+
+      if (ok) {
+        devindex = i;
+      }
+    }
+    if (devindex < 0) {
+      throw rte(string("Device not found: ") + string(devinfo_gen.device_name));
+    }
+
+    using Dtype = DataTypeDescriptor::DataType;
+    const Dtype dtype = dataType();
+    // Sample format is bit flag
+    PaSampleFormat format = paNonInterleaved;
+    switch (dtype) {
+      case Dtype::dtype_fl32:
+        DEBUGTRACE_PRINT("Datatype float32");
+        format |= paFloat32;
+        break;
+      case Dtype::dtype_fl64:
+        DEBUGTRACE_PRINT("Datatype float64");
+        throw rte("Invalid data type specified for DAQ stream.");
+        break;
+      case Dtype::dtype_int8:
+        DEBUGTRACE_PRINT("Datatype int8");
+        format |= paInt8;
+        break;
+      case Dtype::dtype_int16:
+        DEBUGTRACE_PRINT("Datatype int16");
+        format |= paInt16;
+        break;
+      case Dtype::dtype_int32:
+        DEBUGTRACE_PRINT("Datatype int32");
+        format |= paInt32;
+        break;
+      default:
+        throw rte("Invalid data type specified for DAQ stream.");
+        break;
+    }
+
+    std::unique_ptr<PaStreamParameters> instreamParams;
+    std::unique_ptr<PaStreamParameters> outstreamParams;
+
+    if (neninchannels() > 0) {
+      instreamParams = std::make_unique<PaStreamParameters>(PaStreamParameters(
+          {.device = devindex,
+           .channelCount = (int)getHighestEnabledInChannel() + 1,
+           .sampleFormat = format,
+           .suggestedLatency = framesPerBlock() / samplerate(),
+           .hostApiSpecificStreamInfo = nullptr}));
+    }
+    if (nenoutchannels() > 0) {
+      outstreamParams = std::make_unique<PaStreamParameters>(PaStreamParameters(
+          {.device = devindex,
+           .channelCount = (int)getHighestEnabledOutChannel() + 1,
+           .sampleFormat = format,
+           .suggestedLatency = framesPerBlock() / samplerate(),
+           .hostApiSpecificStreamInfo = nullptr}));
+    }
+
+    // Next step: check whether we are OK
+    err = Pa_IsFormatSupported(instreamParams.get(), outstreamParams.get(),
+                               samplerate());
+    throwIfError(err);
+
+    err = Pa_OpenStream(&_stream,               // stream
+                        instreamParams.get(),   // inputParameters
+                        outstreamParams.get(),  // outputParameters
+                        samplerate(),           // yeah,
+                        framesPerBlock(),       // framesPerBuffer
+                        paNoFlag,               // streamFlags
+                        rawPaCallback, this);
+    throwIfError(err);
+    assert(_stream);
+  } catch (rte &e) {
+    if (shouldPaTerminate) {
+      PaError err = Pa_Terminate();
+      if (err != paNoError) {
+        cerr << "Error terminating PortAudio. Do not know what to do." << endl;
+      }
+    }
+    throw;
+  }
+}
+
+void PortAudioDaq::start(InDaqCallback inCallback, OutDaqCallback outCallback) {
+  DEBUGTRACE_ENTER;
+  assert(_stream);
+  MuteErrHandler guard;
+
+  if (Pa_IsStreamActive(_stream)) {
+    throw rte("Stream is already running");
+  }
+
+  if (neninchannels() > 0) {
+    if (!inCallback) {
+      throw rte(
+
+          "Input callback given, but stream does not provide input data");
+    }
+
+    _incallback = inCallback;
+  }
+  if (nenoutchannels() > 0) {
+    if (!outCallback) {
+      throw rte(
+          "Output callback given, but stream does not provide output data");
+    }
+    _outcallback = outCallback;
+  }
+
+  PaError err = Pa_StartStream(_stream);
+  throwIfError(err);
+}
+void PortAudioDaq::stop() {
+  DEBUGTRACE_ENTER;
+  assert(_stream);
+  if (Pa_IsStreamStopped(_stream) > 1) {
+    throw rte("Stream is already stopped");
+  }
+  PaError err = Pa_StopStream(_stream);
+  throwIfError(err);
+}
+Daq::StreamStatus PortAudioDaq::getStreamStatus() const {
+  DEBUGTRACE_ENTER;
+  // Stores an error type and whether the
+  Daq::StreamStatus status;
+  using StreamError = Daq::StreamStatus::StreamError;
+  Daq::StreamStatus::StreamError errortype = _streamError.load();
+
+  PaError err = Pa_IsStreamStopped(_stream);
+  if (err > 1) {
+    // Stream is stopped due to an error in the callback. The exact error type
+    // is filled in in the if-statement above
+    return status;
+  } else if (err == 0) {
+    // Still running
+    status.isRunning = true;
+  } else if (err < 0) {
+    // Stream encountered an error.
+    switch (err) {
+      case paInternalError:
+        errortype = StreamError::driverError;
+        break;
+      case paDeviceUnavailable:
+        errortype = StreamError::driverError;
+        break;
+      case paInputOverflowed:
+        errortype = StreamError::inputXRun;
+        break;
+      case paOutputUnderflowed:
+        errortype = StreamError::outputXRun;
+        break;
+      default:
+        errortype = StreamError::driverError;
+        cerr << "Portaudio backend error:" << Pa_GetErrorText(err) << endl;
+        break;
+    }
+  }
+  status.errorType = errortype;
+  return status;
+}
+
+PortAudioDaq::~PortAudioDaq() {
+  DEBUGTRACE_ENTER;
+  PaError err;
+  assert(_stream);
+  if (Pa_IsStreamActive(_stream)) {
+    // Stop the stream first
+    stop();
+  }
+
+  err = Pa_CloseStream(_stream);
+  _stream = nullptr;
+  if (err != paNoError) {
+    cerr << "Error closing PortAudio stream. Do not know what to do." << endl;
+  }
+
+  err = Pa_Terminate();
+  if (err != paNoError) {
+    cerr << "Error terminating PortAudio. Do not know what to do." << endl;
+  }
+}
+
+int PortAudioDaq::memberPaCallback(const void *inputBuffer, void *outputBuffer,
+                                   unsigned long framesPerBuffer,
+                                   const PaStreamCallbackTimeInfo *timeInfo,
+                                   PaStreamCallbackFlags statusFlags) {
+  DEBUGTRACE_ENTER;
+  typedef Daq::StreamStatus::StreamError se;
+  if (statusFlags & paPrimingOutput) {
+    // Initial output buffers generated. So nothing with input yet
+    return paContinue;
+  }
+  if ((statusFlags & paInputUnderflow) || (statusFlags & paInputOverflow)) {
+    _streamError = se::inputXRun;
+    return paAbort;
+  }
+  if ((statusFlags & paOutputUnderflow) || (statusFlags & paOutputOverflow)) {
+    _streamError = se::outputXRun;
+    return paAbort;
+  }
+  if (framesPerBuffer != framesPerBlock()) {
+    cerr << "Logic error: expected a block size of: " << framesPerBlock()
+         << endl;
+    _streamError = se::logicError;
+    return paAbort;
+  }
+
+  const us neninchannels = this->neninchannels();
+  const us nenoutchannels = this->nenoutchannels();
+  const auto &dtype_descr = dtypeDescr();
+  const auto dtype = dataType();
+  const us sw = dtype_descr.sw;
+  if (inputBuffer) {
+    assert(_incallback);
+    std::vector<byte_t *> ptrs;
+    ptrs.reserve(neninchannels);
+
+    const us ch_min = getLowestEnabledInChannel();
+    const us ch_max = getHighestEnabledInChannel();
+    assert(ch_min < ninchannels);
+    assert(ch_max < ninchannels);
+
+    /// Only pass on the pointers of the channels we want. inputBuffer is
+    /// noninterleaved, as specified in PortAudioDaq constructor.
+    for (us ch = ch_min; ch <= ch_max; ch++) {
+      if (inchannel_config.at(ch).enabled) {
+        byte_t *ch_ptr =
+            reinterpret_cast<byte_t **>(const_cast<void *>(inputBuffer))[ch];
+        ptrs.push_back(ch_ptr);
+      }
+    }
+    DaqData d{framesPerBuffer, neninchannels, dtype};
+    d.copyInFromRaw(ptrs);
+
+    _incallback(d);
+  }
+
+  if (outputBuffer) {
+    assert(_outcallback);
+    std::vector<byte_t *> ptrs;
+    ptrs.reserve(nenoutchannels);
+
+    /* outCallback */
+
+    const us ch_min = getLowestEnabledOutChannel();
+    const us ch_max = getHighestEnabledOutChannel();
+    assert(ch_min < noutchannels);
+    assert(ch_max < noutchannels);
+    /// Only pass on the pointers of the channels we want
+    for (us ch = ch_min; ch <= ch_max; ch++) {
+      if (outchannel_config.at(ch).enabled) {
+        byte_t *ch_ptr = reinterpret_cast<byte_t **>(outputBuffer)[ch];
+        ptrs.push_back(ch_ptr);
+      }
+    }
+    DaqData d{framesPerBuffer, nenoutchannels, dtype};
+
+    _outcallback(d);
+    // Copy over the buffer
+    us j = 0;
+    for (auto ptr : ptrs) {
+      d.copyToRaw(j, ptr);
+      j++;
+    }
+  }
+
+  return paContinue;
+}
+#endif

cpp_src/device/portaudio/lasp_portaudiodaq.h

@@ -0,0 +1,35 @@
+#pragma once
+#include "lasp_daq.h"
+#include <memory>
+
+/** \addtogroup device
+ * @{
+ * \defgroup portaudio PortAudio backend
+ * This code is used to interface with the PortAudio cross-platform audio
+ * interface.
+ *
+ * \addtogroup portaudio
+ * @{
+ */
+
+
+/**
+ * @brief Method called from Daq::createDaq.
+ *
+ * @param devinfo Device info
+ * @param config DAQ Configuration settings
+ *
+ * @return Pointer to Daq instance. Throws Runtime errors on error.
+ */
+std::unique_ptr<Daq> createPortAudioDevice(const DeviceInfo& devinfo,
+        const DaqConfiguration& config);
+
+/**
+ * @brief Append PortAudio backend devices to the list
+ *
+ * @param devinfolist List to append to
+ */
+void fillPortAudioDeviceInfo(DeviceInfoList &devinfolist);
+
+/** @} */
+/** @} */

cpp_src/device/uldaq/lasp_uldaq_bufhandler.cpp

@@ -0,0 +1,245 @@
+/* #define DEBUGTRACE_ENABLED */
+#include "debugtrace.hpp"
+#include "lasp_config.h"
+
+#if LASP_HAS_ULDAQ == 1
+#include "lasp_uldaq_bufhandler.h"
+#include "lasp_daq.h"
+
+InBufHandler::InBufHandler(DT9837A &daq, InDaqCallback cb)
+    : BufHandler(daq, daq.neninchannels()), cb(cb)
+
+{
+  DEBUGTRACE_ENTER;
+  assert(daq.getHandle() != 0);
+
+  monitorOutput = daq.monitorOutput;
+
+  DaqInScanFlag inscanflags = DAQINSCAN_FF_DEFAULT;
+  ScanOption scanoptions = SO_CONTINUOUS;
+  UlError err = ERR_NO_ERROR;
+
+  std::vector<DaqInChanDescriptor> indescs;
+  boolvec eninchannels_without_mon = daq.eninchannels(false);
+
+  // Set ranges for each input. Below asks only channels that are not a
+  // monitor channel (hence the false flag).
+  dvec ranges = daq.inputRangeForEnabledChannels(false);
+
+  us enabled_ch_counter = 0;
+  for (us chin = 0; chin < 4; chin++) {
+    if (eninchannels_without_mon[chin] == true) {
+      DaqInChanDescriptor indesc;
+      indesc.type = DAQI_ANALOG_SE;
+      indesc.channel = chin;
+
+      double rangeval = ranges.at(enabled_ch_counter);
+      Range rangenum;
+      if (fabs(rangeval - 1.0) < 1e-8) {
+        rangenum = BIP1VOLTS;
+      } else if (fabs(rangeval - 10.0) < 1e-8) {
+        rangenum = BIP10VOLTS;
+      } else {
+        throw Daq::StreamException(Daq::StreamStatus::StreamError::logicError);
+        std::cerr << "Fatal: input range value is invalid" << endl;
+        return;
+      }
+      indesc.range = rangenum;
+      indescs.push_back(indesc);
+      enabled_ch_counter++;
+    }
+  }
+
+  // Add possibly last channel as monitor
+  if (monitorOutput) {
+    DaqInChanDescriptor indesc;
+    indesc.type = DAQI_DAC;
+    indesc.channel = 0;
+    /// The output only has a range of 10V, therefore the monitor of the
+    /// output also has to be set to this value.
+    indesc.range = BIP10VOLTS;
+    indescs.push_back(indesc);
+  }
+  assert(indescs.size() == nchannels);
+
+  DEBUGTRACE_MESSAGE("Starting input scan");
+
+  err = ulDaqInScan(daq.getHandle(), indescs.data(), nchannels,
+                    2 * nFramesPerBlock, // Watch the 2 here!
+                    &samplerate, scanoptions, inscanflags, buf.data());
+  throwOnPossibleUlException(err);
+}
+void InBufHandler::start() {
+
+  DEBUGTRACE_ENTER;
+  ScanStatus status;
+  TransferStatus transferStatus;
+  UlError err = ulDaqInScanStatus(daq.getHandle(), &status, &transferStatus);
+  throwOnPossibleUlException(err);
+
+  totalFramesCount = transferStatus.currentTotalCount;
+  topenqueued = true;
+  botenqueued = true;
+}
+
+bool InBufHandler::operator()() {
+
+  /* DEBUGTRACE_ENTER; */
+
+  bool ret = true;
+
+  auto runCallback = ([&](us totalOffset) {
+    /* DEBUGTRACE_ENTER; */
+
+    DaqData data(nFramesPerBlock, nchannels, dtype_descr.dtype);
+
+    us monitorOffset = monitorOutput ? 1 : 0;
+    /* /// Put the output monitor in front */
+    if (monitorOutput) {
+      for (us frame = 0; frame < nFramesPerBlock; frame++) {
+        data.value<double>(frame, 0) =
+            buf[totalOffset  // Offset to lowest part of the buffer, or not
+            + (frame * nchannels) // Data is interleaved, so skip each
+            + (nchannels - 1)] // Monitor comes as last in the channel list,
+                               // but we want it first in the output data.
+            ;
+      }
+    }
+
+    // Now, all normal channels
+    for (us channel = 0; channel < nchannels - monitorOffset; channel++) {
+      /* DEBUGTRACE_PRINT(channel); */
+      for (us frame = 0; frame < nFramesPerBlock; frame++) {
+        data.value<double>(frame, channel + monitorOffset) =
+            buf[totalOffset + (frame * nchannels) + channel];
+      }
+    }
+    return cb(data);
+  });
+
+  ScanStatus status;
+  TransferStatus transferStatus;
+
+  UlError err = ulDaqInScanStatus(daq.getHandle(), &status, &transferStatus);
+  throwOnPossibleUlException(err);
+
+  us increment = transferStatus.currentTotalCount - totalFramesCount;
+  totalFramesCount += increment;
+
+  if (increment > nFramesPerBlock) {
+    throw Daq::StreamException(Daq::StreamStatus::StreamError::inputXRun);
+  }
+  assert(status == SS_RUNNING);
+
+  if (transferStatus.currentIndex < (long long)buffer_mid_idx) {
+    topenqueued = false;
+    if (!botenqueued) {
+      runCallback(nchannels * nFramesPerBlock);
+      botenqueued = true;
+    }
+  } else {
+    botenqueued = false;
+    if (!topenqueued) {
+      runCallback(0);
+      topenqueued = true;
+    }
+  }
+  return ret;
+}
+InBufHandler::~InBufHandler() {
+  // At exit of the function, stop scanning.
+  DEBUGTRACE_ENTER;
+  UlError err = ulDaqInScanStop(daq.getHandle());
+  if (err != ERR_NO_ERROR) {
+    showErr(err);
+  }
+}
+
+OutBufHandler::OutBufHandler(DT9837A &daq, OutDaqCallback cb)
+    : BufHandler(daq, daq.nenoutchannels()), cb(cb) {
+
+  DEBUGTRACE_MESSAGE("Starting output scan");
+  DEBUGTRACE_PRINT(nchannels);
+  AOutScanFlag outscanflags = AOUTSCAN_FF_DEFAULT;
+  ScanOption scanoptions = SO_CONTINUOUS;
+  UlError err = ulAOutScan(daq.getHandle(), 0, 0, BIP10VOLTS,
+                           2 * nFramesPerBlock, // Watch the 2 here!
+                           &samplerate, scanoptions, outscanflags, buf.data());
+
+  throwOnPossibleUlException(err);
+}
+void OutBufHandler::start() {
+
+  ScanStatus status;
+  TransferStatus transferStatus;
+
+  UlError err = ulAOutScanStatus(daq.getHandle(), &status, &transferStatus);
+  if (err != ERR_NO_ERROR) {
+    showErr(err);
+    throw rte("Unable to start output on DAQ");
+  }
+  if (status != SS_RUNNING) {
+    throw rte("Unable to start output on DAQ");
+  }
+  totalFramesCount = transferStatus.currentTotalCount;
+  topenqueued = true;
+  botenqueued = true;
+}
+bool OutBufHandler::operator()() {
+
+  DEBUGTRACE_ENTER;
+  bool res = true;
+  assert(daq.getHandle() != 0);
+
+  UlError err = ERR_NO_ERROR;
+
+  ScanStatus status;
+  TransferStatus transferStatus;
+
+  err = ulAOutScanStatus(daq.getHandle(), &status, &transferStatus);
+  throwOnPossibleUlException(err);
+  if (status != SS_RUNNING) {
+    return false;
+  }
+  us increment = transferStatus.currentTotalCount - totalFramesCount;
+  totalFramesCount += increment;
+
+  if (increment > nFramesPerBlock) {
+    cerr << "totalFramesCount: " << totalFramesCount << ". Detected output underrun" << endl;
+    /* throw Daq::StreamException(Daq::StreamStatus::StreamError::outputXRun); */
+  }
+
+  if (transferStatus.currentIndex < buffer_mid_idx) {
+    topenqueued = false;
+    if (!botenqueued) {
+      DaqData d(nFramesPerBlock, 1,// Only one output channel
+                                  dtype_descr.dtype);
+      // Receive data, run callback
+      cb(d);
+      d.copyToRaw(0, reinterpret_cast<byte_t *>(&(buf[buffer_mid_idx])));
+
+      botenqueued = true;
+    }
+  } else {
+    botenqueued = false;
+    if (!topenqueued) {
+      DaqData d(nFramesPerBlock, 1,// Only one output channel
+                                  dtype_descr.dtype);
+      // Receive
+      cb(d);
+      d.copyToRaw(0, reinterpret_cast<byte_t *>(&(buf[0])));
+
+      topenqueued = true;
+    }
+  }
+  return res;
+}
+
+OutBufHandler::~OutBufHandler() {
+  DEBUGTRACE_ENTER;
+  UlError err = ulAOutScanStop(daq.getHandle());
+  if (err != ERR_NO_ERROR) {
+    showErr(err);
+  }
+}
+#endif

cpp_src/device/uldaq/lasp_uldaq_bufhandler.h

@@ -1,75 +1,20 @@
 #pragma once
-#include "lasp_daq.h"
-#include <algorithm>
-#include <cassert>
-#include <chrono>
-#include <iostream>
-#include <stdexcept>
-#include <thread>
 #include <uldaq.h>
-#include <vector>
+#include "lasp_types.h"
+#include "lasp_uldaq_impl.h"
+#include "lasp_uldaq_common.h"
 
-using std::atomic;
-using std::cerr;
-using std::endl;
-using rte = std::runtime_error;
 
-/**
- * @brief UlDaq-specific device information. Adds a copy of the underlying
- * DaqDeDaqDeviceDescriptor.
+
+/** \addtogroup device
+ * @{
+ * \addtogroup uldaq
  */
-class UlDaqDeviceInfo : public DeviceInfo {
-
-public:
-  DaqDeviceDescriptor _uldaqDescriptor;
-  virtual std::unique_ptr<DeviceInfo> clone() const {
-    return std::make_unique<UlDaqDeviceInfo>(*this);
-  }
-};
-
-class DT9837A : public Daq {
-
-  DaqDeviceHandle _handle = 0;
-  std::mutex _daqmutex;
-
-  std::thread _thread;
-  atomic<bool> _stopThread{false};
-  atomic<StreamStatus> _streamStatus;
-
-  const us _nFramesPerBlock;
-
-  void threadFcn(InDaqCallback inCallback, OutDaqCallback outcallback);
-
-public:
-  DaqDeviceHandle getHandle() const { return _handle; }
-  /**
-   * @brief Create a DT9837A instance.
-   *
-   * @param devinfo DeviceInfo to connect to
-   * @param config DaqConfiguration settings
-   */
-  DT9837A(const DeviceInfo &devinfo, const DaqConfiguration &config);
-
-  virtual ~DT9837A();
-
-  bool isRunning() const;
-
-  void stop() override final;
-
-  friend class InBufHandler;
-  friend class OutBufHandler;
-
-  virtual void start(InDaqCallback inCallback,
-                     OutDaqCallback outCallback) override final;
-
-  virtual StreamStatus getStreamStatus() const override {
-    return _streamStatus;
-  }
-};
-
 /**
  * @brief Helper class for managing input and output samples of the DAQ device.
  */
+
+class DT9837A;
 class BufHandler {
 protected:
   /**
@@ -88,12 +33,19 @@ protected:
    * @brief Sampling frequency in Hz
    */
   double samplerate;
+  /**
+   * @brief Storage capacity for the DAQ I/O.
+   */
   std::vector<double> buf;
   /**
-   * @brief Whether the top / bottom part of the buffer are ready to be
+   * @brief Whether the top part of the buffer is enqueued
+   */
+  bool topenqueued = false;
+  /**
+   * @brief Whether the bottom part of the buffer is enqueued
    * enqueued
    */
-  bool topenqueued, botenqueued;
+  bool botenqueued = false;
 
   /**
    * @brief Counter for the total number of frames acquired / sent since the
@@ -117,6 +69,7 @@ public:
             0),
         buffer_mid_idx(nchannels * nFramesPerBlock) {
     assert(nchannels > 0);
+    assert(nFramesPerBlock > 0);
   }
 };
 /**
@@ -152,3 +105,5 @@ public:
 
   ~OutBufHandler();
 };
+/** @} */
+/** @} */

cpp_src/device/uldaq/lasp_uldaq_common.cpp

@@ -0,0 +1,46 @@
+/* #define DEBUGTRACE_ENABLED */
+#include "debugtrace.hpp"
+#include "lasp_config.h"
+
+#if LASP_HAS_ULDAQ == 1
+#include "lasp_uldaq_common.h"
+#include "lasp_daq.h"
+
+string getErrMsg(UlError err) {
+  string errstr;
+  errstr.reserve(ERR_MSG_LEN);
+  char errmsg[ERR_MSG_LEN];
+  errstr = "UlDaq API Error: ";
+  ulGetErrMsg(err, errmsg);
+  errstr += errmsg;
+  return errstr;
+}
+void showErr(string errstr) {
+  std::cerr << "\b\n**************** UlDAQ backend error **********\n";
+  std::cerr << errstr << std::endl;
+  std::cerr << "***********************************************\n\n";
+}
+void showErr(UlError err) {
+  if (err != ERR_NO_ERROR)
+    showErr(getErrMsg(err));
+}
+
+
+void throwOnPossibleUlException(UlError err) {
+  if (err == ERR_NO_ERROR) {
+    return;
+  }
+  string errstr = getErrMsg(err);
+  showErr(errstr);
+  Daq::StreamStatus::StreamError serr;
+  if ((int)err == 18) {
+    serr = Daq::StreamStatus::StreamError::inputXRun;
+  } else if ((int)err == 19) {
+    serr = Daq::StreamStatus::StreamError::outputXRun;
+  } else {
+    serr = Daq::StreamStatus::StreamError::driverError;
+  }
+
+  throw Daq::StreamException(serr, errstr);
+}
+#endif

cpp_src/device/uldaq/lasp_uldaq_common.h

@@ -0,0 +1,66 @@
+#pragma once
+#include <uldaq.h>
+#include <string>
+#include "lasp_deviceinfo.h"
+
+/** \addtogroup device
+ * @{
+ * \addtogroup uldaq
+ */
+/**
+ * @brief Throws an appropriate stream exception based on the UlError number.
+ * The mapping is based on the error numbers as given in uldaq.h. There are a
+ * log of errors definded here (109 in total). Except for some, we will map
+ * most of them to a driver error.
+ *
+ * @param e The backend error code.
+ */
+void throwOnPossibleUlException(UlError err);
+
+/**
+ * @brief Return a string corresponding to the UlDaq API error
+ *
+ * @param err error code
+ *
+ * @return Error string
+ */
+string getErrMsg(UlError err);
+
+/**
+ * @brief Print error message to stderr
+ *
+ * @param errstr The string to print
+ */
+void showErr(UlError err);
+
+/**
+ * @brief Get a string representation of the error
+ *
+ * @param errstr
+ */
+void showErr(std::string errstr);
+
+/**
+ * @brief UlDaq-specific device information. Adds a copy of the underlying
+ * DaqDeDaqDeviceDescriptor.
+ */
+class UlDaqDeviceInfo : public DeviceInfo {
+
+public:
+  DaqDeviceDescriptor _uldaqDescriptor;
+  virtual std::unique_ptr<DeviceInfo> clone() const override {
+    DEBUGTRACE_ENTER;
+    return std::make_unique<UlDaqDeviceInfo>(*this);
+  }
+};
+
+/**
+ * @brief List of available sampling frequencies for DT9837A
+ */
+const std::vector<d> ULDAQ_SAMPLERATES = {8000,  10000, 11025, 16000, 20000,
+                                    22050, 24000, 32000, 44056, 44100,
+                                    47250, 48000, 50000, 50400, 51000};
+
+
+/** @} */
+/** @} */

cpp_src/device/uldaq/lasp_uldaq_impl.cpp

@@ -0,0 +1,212 @@
+/* #define DEBUGTRACE_ENABLED */
+#include "debugtrace.hpp"
+#include "lasp_config.h"
+
+#if LASP_HAS_ULDAQ == 1
+#include "lasp_daqconfig.h"
+#include "lasp_uldaq.h"
+#include "lasp_uldaq_bufhandler.h"
+#include "lasp_uldaq_impl.h"
+
+using namespace std::literals::chrono_literals;
+
+DT9837A::~DT9837A() {
+  DEBUGTRACE_ENTER;
+  UlError err;
+  if (isRunning()) {
+    DEBUGTRACE_PRINT("Stop UlDAQ from destructor");
+    stop();
+  }
+
+  if (_handle) {
+    DEBUGTRACE_PRINT("Disconnecting and releasing DaqDevice");
+    /* err = ulDisconnectDaqDevice(_handle); */
+    /* showErr(err); */
+    err = ulReleaseDaqDevice(_handle);
+    showErr(err);
+  }
+}
+DT9837A::DT9837A(const UlDaqDeviceInfo &devinfo, const DaqConfiguration &config)
+    : Daq(devinfo, config),
+      _nFramesPerBlock(availableFramesPerBlock.at(framesPerBlockIndex)) {
+
+  const DaqDeviceDescriptor &descriptor = devinfo._uldaqDescriptor;
+  DEBUGTRACE_PRINT(string("Device:     ") + descriptor.productName);
+  DEBUGTRACE_PRINT(string("Product id: ") + to_string(descriptor.productId));
+  DEBUGTRACE_PRINT(string("Dev string: ") + descriptor.devString);
+  DEBUGTRACE_PRINT(string("Unique id:  ") + descriptor.uniqueId);
+
+  // get a handle to the DAQ device associated with the first descriptor
+  _handle = ulCreateDaqDevice(descriptor);
+
+  if (_handle == 0) {
+    throw rte("Unable to create a handle to the specified DAQ "
+              "device. Is the device currently in use? Please make sure to set "
+              "the DAQ configuration in duplex mode if simultaneous input and "
+              "output is required.");
+  }
+
+  UlError err = ulConnectDaqDevice(_handle);
+
+  if (err != ERR_NO_ERROR) {
+    ulReleaseDaqDevice(_handle);
+    _handle = 0;
+    throw rte("Unable to connect to device: " + getErrMsg(err));
+  }
+
+  /// Loop over input channels, set parameters
+  for (us ch = 0; ch < 4; ch++) {
+
+    err = ulAISetConfigDbl(_handle, AI_CFG_CHAN_SENSOR_SENSITIVITY, ch, 1.0);
+    showErr(err);
+    if (err != ERR_NO_ERROR) {
+      throw rte("Fatal: could normalize channel sensitivity");
+    }
+
+    CouplingMode cm = inchannel_config.at(ch).ACCouplingMode ? CM_AC : CM_DC;
+    err = ulAISetConfig(_handle, AI_CFG_CHAN_COUPLING_MODE, ch, cm);
+    if (err != ERR_NO_ERROR) {
+      showErr(err);
+      throw rte("Fatal: could not set AC/DC coupling mode");
+    }
+
+    IepeMode iepe =
+        inchannel_config.at(ch).IEPEEnabled ? IEPE_ENABLED : IEPE_DISABLED;
+    err = ulAISetConfig(_handle, AI_CFG_CHAN_IEPE_MODE, ch, iepe);
+    if (err != ERR_NO_ERROR) {
+      showErr(err);
+      throw rte("Fatal: could not set IEPE mode");
+    }
+  }
+}
+
+bool DT9837A::isRunning() const {
+  DEBUGTRACE_ENTER;
+  /* return _thread.joinable(); */
+  StreamStatus status = _streamStatus;
+  return status.isRunning;
+}
+void DT9837A::stop() {
+  DEBUGTRACE_ENTER;
+  StreamStatus status = _streamStatus;
+  status.isRunning = true;
+  _streamStatus = status;
+  if (!isRunning()) {
+    throw rte("No data acquisition running");
+  }
+
+  // Stop the thread and join it
+  _stopThread = true;
+  assert(_thread.joinable());
+  _thread.join();
+  _stopThread = false;
+
+  // Update stream status
+  status.isRunning = false;
+  _streamStatus = status;
+}
+
+void DT9837A::start(InDaqCallback inCallback, OutDaqCallback outCallback) {
+  DEBUGTRACE_ENTER;
+  if (isRunning()) {
+    throw rte("DAQ is already running");
+  }
+  if (neninchannels() > 0) {
+    if (!inCallback)
+      throw rte("DAQ requires a callback for input data");
+  }
+  if (nenoutchannels() > 0) {
+    if (!outCallback)
+      throw rte("DAQ requires a callback for output data");
+  }
+  assert(neninchannels() + nenoutchannels() > 0);
+  _thread = std::thread(&DT9837A::threadFcn, this, inCallback, outCallback);
+  
+}
+
+void DT9837A::threadFcn(InDaqCallback inCallback, OutDaqCallback outCallback) {
+
+  DEBUGTRACE_ENTER;
+
+  try {
+
+    std::unique_ptr<OutBufHandler> obh;
+    std::unique_ptr<InBufHandler> ibh;
+
+    StreamStatus status = _streamStatus;
+    status.isRunning = true;
+    _streamStatus = status;
+
+    if (nenoutchannels() > 0) {
+      assert(outCallback);
+      obh = std::make_unique<OutBufHandler>(*this, outCallback);
+    }
+    if (neninchannels() > 0) {
+      assert(inCallback);
+      ibh = std::make_unique<InBufHandler>(*this, inCallback);
+    }
+    if (obh)
+      obh->start();
+    if (ibh)
+      ibh->start();
+
+    const double sleeptime_s =
+        static_cast<double>(_nFramesPerBlock) / (16 * samplerate());
+    const us sleeptime_us = static_cast<us>(sleeptime_s * 1e6);
+
+    while (!_stopThread) {
+      if (ibh) {
+        if (!(*ibh)()) {
+          _stopThread = true;
+          break;
+        }
+      }
+      if (obh) {
+        if (!(*obh)()) {
+          _stopThread = true;
+          break;
+        }
+      }
+
+      std::this_thread::sleep_for(std::chrono::microseconds(sleeptime_us));
+    }
+
+    /// Update stream status that we are not running anymore
+    status.isRunning = false;
+    _streamStatus = status;
+    _stopThread = false;
+
+  } catch (StreamException &e) {
+
+    StreamStatus status = _streamStatus;
+    // Copy over error type
+    status.errorType = e.e;
+    _streamStatus = status;
+
+    cerr << "\n******************\n";
+    cerr << "Catched error in UlDAQ thread: " << e.what() << endl;
+    cerr << "\n******************\n";
+  }
+}
+
+void DT9837A::sanityChecks() const {
+  // Some sanity checks
+  if (inchannel_config.size() != 4) {
+    throw rte("Invalid length of enabled inChannels vector");
+  }
+
+  if (outchannel_config.size() != 1) {
+    throw rte("Invalid length of enabled outChannels vector");
+  }
+
+  if (_nFramesPerBlock < 24 || _nFramesPerBlock > 8192) {
+    throw rte("Unsensible number of samples per block chosen");
+  }
+
+  if (samplerate() < ULDAQ_SAMPLERATES.at(0) ||
+      samplerate() > ULDAQ_SAMPLERATES.at(ULDAQ_SAMPLERATES.size() - 1)) {
+    throw rte("Invalid sample rate");
+  }
+}
+
+#endif // LASP_HAS_ULDAQ

cpp_src/device/uldaq/lasp_uldaq_impl.h

@@ -0,0 +1,110 @@
+#pragma once
+#include "debugtrace.hpp"
+#include "lasp_uldaq_common.h"
+#include <algorithm>
+#include <cassert>
+#include <chrono>
+#include <iostream>
+#include <stdexcept>
+#include <thread>
+#include <vector>
+#include "lasp_daq.h"
+
+using std::atomic;
+using std::cerr;
+using std::endl;
+using rte = std::runtime_error;
+
+class InBufHandler;
+class OutBufHandler;
+
+/** \addtogroup device
+ * @{
+ * \addtogroup uldaq
+ */
+
+/**
+ * @brief Data translation DT9837A Daq device.
+ */
+class DT9837A : public Daq {
+
+  DaqDeviceHandle _handle = 0;
+  std::mutex _daqmutex;
+
+  /**
+   * @brief The thread that is doing I/O with UlDaq
+   */
+  std::thread _thread;
+
+
+  /**
+   * @brief Flag indicating the thread to stop processing.
+   */
+  atomic<bool> _stopThread{false};
+  /**
+   * @brief Storage for exchanging information on the stream
+   */
+  atomic<StreamStatus> _streamStatus;
+
+  const us _nFramesPerBlock;
+
+  /**
+   * @brief The function that is running in a thread
+   *
+   * @param inCallback 
+   * @param outcallback
+   */
+  void threadFcn(InDaqCallback inCallback, OutDaqCallback outcallback);
+
+  /**
+   * @brief Obtain a handle to the underlying device
+   *
+   * @return Handle
+   */
+  DaqDeviceHandle getHandle() const { return _handle; }
+  /**
+   * @brief Perform several sanity checks
+   */
+  void sanityChecks() const;
+public:
+
+  /**
+   * @brief Create a DT9837A instance.
+   *
+   * @param devinfo DeviceInfo to connect to
+   * @param config DaqConfiguration settings
+   */
+  DT9837A(const UlDaqDeviceInfo &devinfo, const DaqConfiguration &config);
+
+  virtual ~DT9837A();
+
+  /**
+   * @brief Returns true when the stream is running
+   *
+   * @return as above stated
+   */
+  bool isRunning() const;
+
+  /**
+   * @brief Stop the data-acquisition
+   */
+  void stop() override final;
+
+  friend class InBufHandler;
+  friend class OutBufHandler;
+
+  virtual void start(InDaqCallback inCallback,
+                     OutDaqCallback outCallback) override final;
+
+  /**
+   * @brief Obtain copy of stream status (thread-safe function)
+   *
+   * @return StreamStatus object
+   */
+  virtual StreamStatus getStreamStatus() const override {
+    return _streamStatus;
+  }
+};
+
+/** @} */
+/** @} */

cpp_src/dsp/CMakeLists.txt

@@ -16,6 +16,7 @@ set(lasp_dsp_files
     lasp_threadedindatahandler.cpp
     lasp_ppm.cpp
     lasp_clip.cpp
+    lasp_freqsmooth.cpp
     )
 
 

cpp_src/dsp/lasp_avpowerspectra.cpp

@@ -2,12 +2,9 @@
 #include "lasp_avpowerspectra.h"
 #include "debugtrace.hpp"
 #include "lasp_mathtypes.h"
-#include <cmath>
-#include <optional>
+#include <stdexcept>
 
 using rte = std::runtime_error;
-using std::cerr;
-using std::endl;
 
 PowerSpectra::PowerSpectra(const us nfft, const Window::WindowType w)
     : PowerSpectra(Window::create(w, nfft)) {}

cpp_src/dsp/lasp_avpowerspectra.h

@@ -3,8 +3,6 @@
 #include "lasp_mathtypes.h"
 #include "lasp_timebuffer.h"
 #include "lasp_window.h"
-#include <memory>
-#include <optional>
 
 /** \defgroup dsp Digital Signal Processing utilities
  * These are classes and functions used for processing raw signal data, to

cpp_src/dsp/lasp_biquadbank.cpp

@@ -2,7 +2,6 @@
 #include "lasp_biquadbank.h"
 #include "debugtrace.hpp"
 #include "lasp_thread.h"
-#include <cassert>
 #include <vector>
 
 using std::cerr;
@@ -44,19 +43,21 @@ SeriesBiquad::SeriesBiquad(const vd &filter_coefs) {
 
 SeriesBiquad SeriesBiquad::firstOrderHighPass(const d fs, const d cuton_Hz) {
 
-  if(fs <= 0) {
+  if (fs <= 0) {
     throw rte("Invalid sampling frequency: " + std::to_string(fs) + " [Hz]");
   }
-  if(cuton_Hz <= 0) {
+  if (cuton_Hz <= 0) {
     throw rte("Invalid cuton frequency: " + std::to_string(cuton_Hz) + " [Hz]");
   }
-  if(cuton_Hz >= 0.98*fs/2) {
-    throw rte("Invalid cuton frequency. We limit this to 0.98* fs / 2. Given value" + std::to_string(cuton_Hz) + " [Hz]");
+  if (cuton_Hz >= 0.98 * fs / 2) {
+    throw rte(
+        "Invalid cuton frequency. We limit this to 0.98* fs / 2. Given value" +
+        std::to_string(cuton_Hz) + " [Hz]");
   }
 
-  const d tau = 1/(2*arma::datum::pi*cuton_Hz);
-  const d facnum = 2*fs*tau/(1+2*fs*tau);
-  const d facden = (1-2*fs*tau)/(1+2*fs*tau);
+  const d tau = 1 / (2 * arma::datum::pi * cuton_Hz);
+  const d facnum = 2 * fs * tau / (1 + 2 * fs * tau);
+  const d facden = (1 - 2 * fs * tau) / (1 + 2 * fs * tau);
 
   vd coefs(6);
   // b0
@@ -76,10 +77,8 @@ SeriesBiquad SeriesBiquad::firstOrderHighPass(const d fs, const d cuton_Hz) {
   coefs(5) = 0;
 
   return SeriesBiquad(coefs);
-
 }
 
-
 std::unique_ptr<Filter> SeriesBiquad::clone() const {
   // sos.as_col() concatenates all columns, exactly what we want.
   return std::make_unique<SeriesBiquad>(sos.as_col());
@@ -124,7 +123,6 @@ BiquadBank::BiquadBank(const dmat &filters, const vd *gains) {
    * for use.
    */
   lock lck(_mtx);
-  getPool();
 
   for (us i = 0; i < filters.n_cols; i++) {
     _filters.emplace_back(filters.col(i));
@@ -153,16 +151,15 @@ void BiquadBank::filter(vd &inout) {
   std::vector<std::future<vd>> futs;
 
 #if 1
-  auto &pool = getPool();
   vd inout_cpy = inout;
   for (us i = 0; i < _filters.size(); i++) {
-    futs.emplace_back(pool.submit(
-          [&](vd inout, us i) {
+    futs.emplace_back(_pool.submit(
+        [&](vd inout, us i) {
           _filters[i].filter(inout);
           return inout;
-          }, // Launch a task to filter.
-          inout_cpy, i  // Column i as argument to the lambda function above.
-          ));
+        },           // Launch a task to filter.
+        inout_cpy, i // Column i as argument to the lambda function above.
+        ));
   }
 
   // Zero-out in-out and sum-up the filtered values

cpp_src/dsp/lasp_biquadbank.h

@@ -1,5 +1,6 @@
 #pragma once
 #include "lasp_filter.h"
+#include "lasp_thread.h"
 
 /**
  * \addtogroup dsp
@@ -60,6 +61,7 @@ public:
 class BiquadBank : public Filter {
   std::vector<SeriesBiquad> _filters;
   vd _gains;
+  GlobalThreadPool _pool;
   mutable std::mutex _mtx;
 
 public:

cpp_src/dsp/lasp_clip.cpp

@@ -1,6 +1,8 @@
 /* #define DEBUGTRACE_ENABLED */
 #include "debugtrace.hpp"
 #include "lasp_clip.h"
+#include "lasp_daqdata.h"
+#include "lasp_daq.h"
 #include <mutex>
 
 using std::cerr;
@@ -9,13 +11,14 @@ using std::endl;
 using Lck = std::scoped_lock<std::mutex>;
 using rte = std::runtime_error;
 
-ClipHandler::ClipHandler(StreamMgr &mgr)
+ClipHandler::ClipHandler(SmgrHandle mgr)
   : ThreadedInDataHandler(mgr){
 
     DEBUGTRACE_ENTER;
+    startThread();
   }
 
-bool ClipHandler::inCallback_threaded(const DaqData &d) {
+void ClipHandler::inCallback(const DaqData &d) {
 
   DEBUGTRACE_ENTER;
   Lck lck(_mtx);
@@ -49,7 +52,6 @@ bool ClipHandler::inCallback_threaded(const DaqData &d) {
       _clip_time(i) += _dt;
     }
   }
-  return true;
 }
 
 arma::uvec ClipHandler::getCurrentValue() const {
@@ -89,6 +91,5 @@ void ClipHandler::reset(const Daq *daq) {
 
 ClipHandler::~ClipHandler() {
   DEBUGTRACE_ENTER;
-  Lck lck(_mtx);
-  stop();
+  stopThread();
 }

cpp_src/dsp/lasp_clip.h

@@ -21,7 +21,7 @@
 /**
  * @brief Clipping detector (Clip). Detects when a signal overdrives the input
  * */
-class ClipHandler: public ThreadedInDataHandler {
+class ClipHandler: public ThreadedInDataHandler<ClipHandler> {
 
   /**
    * @brief Assuming full scale of a signal is +/- 1.0. If a value is found 
@@ -58,7 +58,7 @@ class ClipHandler: public ThreadedInDataHandler {
    *
    * @param mgr Stream Mgr to operate on
    */
-  ClipHandler(StreamMgr& mgr);
+  ClipHandler(SmgrHandle mgr);
   ~ClipHandler();
 
   /**
@@ -68,8 +68,8 @@ class ClipHandler: public ThreadedInDataHandler {
    */
   arma::uvec getCurrentValue() const;
 
-  bool inCallback_threaded(const DaqData& ) override final;
-  void reset(const Daq*) override final;
+  void inCallback(const DaqData& );
+  void reset(const Daq*);
 
 };
 

cpp_src/dsp/lasp_freqsmooth.cpp

@@ -0,0 +1,133 @@
+// #define DEBUGTRACE_ENABLED
+#include "lasp_freqsmooth.h"
+
+#include <cassert>
+
+#include "debugtrace.hpp"
+
+using rte = std::runtime_error;
+
+vd freqSmooth(const vd& freq, const vd& X, const unsigned w,
+              bool power_correct) {
+  DEBUGTRACE_ENTER;
+  if (freq.size() < 2) {
+    throw rte("Invalid frequency size. Should be > 2");
+  }
+  if (freq.size() != X.size()) {
+    throw rte("Sizes of freq and X do not match");
+  }
+  if (freq.size() > std::numeric_limits<long>::max() / 2) {
+    throw rte("Frequency size limit for smoothing is 2^30");
+  }
+  if (w == 0) {
+    throw rte("Invalid number of octaves");
+  }
+  const us Nfreq = freq.size();
+
+  // Smoothing width in unit of number of octaves
+  const d Delta = 1 / d(w);
+
+  // Minimum frequency and maximum frequency to smooth on (frequency range that
+  // is interpolated to a log scale)
+  d freq_min;
+  const d freq_max = freq(Nfreq - 1);
+  const bool firstFreqEqZero = (d_abs(freq(0)) < 1e-15);
+
+  // AC-signal power
+  d ac_pwr;
+  if (firstFreqEqZero) {
+    freq_min = freq(1);
+    if (power_correct) {
+      ac_pwr = arma::sum(X.subvec(1, Nfreq - 1));
+    }
+  } else {
+    freq_min = freq(0);
+    if (power_correct) {
+      ac_pwr = arma::sum(X);
+    }
+  }
+  DEBUGTRACE_PRINT(freq_min);
+  DEBUGTRACE_PRINT(freq_max);
+  const vd freq_log =
+      arma::logspace(d_log10(freq_min), d_log10(freq_max), 10 * Nfreq);
+  DEBUGTRACE_PRINT("freq_log = ");
+
+  const long Nfreq_sm = freq_log.size();
+
+  // Interpolate X to logscale
+  vd X_log;
+  DEBUGTRACE_PRINT("X_log = :");
+  arma::interp1(freq, X, freq_log, X_log, "*linear");
+
+  // First and last point are not interpolated well, could be minimally out of
+  // the interpolation range, due to roundoff errors. Armadillo sets these
+  // points to nan, so we have to manually "interpolate" them.
+  X_log(Nfreq_sm - 1) = X(X.size() - 1);
+  if (firstFreqEqZero) {
+    X_log(0) = X(1);
+  } else {
+    X_log(0) = X(0);
+  }
+
+  // Allocate space for smoothed X on log scale
+  vd Xsm_log(freq_log.size());
+  const d beta = d_log10(Nfreq_sm) / d_log10(2) / (Nfreq_sm - 1);
+  // int rounds down
+  const long mu = int(Delta / d(2) / beta);
+  DEBUGTRACE_PRINT(mu);
+
+  // Long is at least 32 bits. So +/- 2M points length
+  for (long k = 0; k < Nfreq_sm; k++) {
+    // const d fcur = freq_log(k);
+    long idx_start = std::max(k - mu, 0l);
+    long idx_stop = std::min(k + mu, Nfreq_sm - 1);
+
+    // Make window smaller at the sides (close to the end of the array)
+    if (idx_start == 0 || idx_stop == Nfreq_sm - 1) {
+      const long mu_edge = std::min(k - idx_start, idx_stop - k);
+      idx_start = k - mu_edge;
+      idx_stop = k + mu_edge;
+    }
+    assert(idx_stop < Nfreq_sm);
+    assert(idx_start < Nfreq_sm);
+
+    DEBUGTRACE_PRINT(idx_start)
+    DEBUGTRACE_PRINT(idx_stop);
+
+    Xsm_log(k) = arma::mean(X_log.subvec(idx_start, idx_stop));
+  }
+  DEBUGTRACE_PRINT("Xsm_log:");
+  //   std::cerr << Xsm_log << std::endl;
+
+  // Back-interpolate to a linear scale, and be wary of nans at the start end
+  // and range. Also interpolates power
+  vd Xsm(Nfreq);
+  if (firstFreqEqZero) {
+    vd Xsm_gt0;
+    arma::interp1(freq_log, Xsm_log, freq.subvec(1, Nfreq - 1), Xsm_gt0,
+                  "*linear");
+    Xsm(0) = X(0);
+    Xsm.subvec(1, Nfreq - 1) = Xsm_gt0;
+    Xsm(1) = Xsm_log(1);
+    Xsm(Nfreq - 1) = Xsm_log(Nfreq_sm - 1);
+
+    // Final step: power-correct smoothed spectrum
+    if (power_correct) {
+      d new_acpwr = arma::sum(Xsm.subvec(1, Nfreq - 1));
+      Xsm.subvec(1, Nfreq - 1) *= ac_pwr / new_acpwr;
+    }
+
+  } else {
+    arma::interp1(freq_log, Xsm_log, freq, Xsm, "*linear");
+    Xsm(0) = X(0);
+    Xsm(Nfreq - 1) = Xsm_log(Nfreq_sm - 1);
+
+    // Final step: power-correct smoothed spectrum
+    if (power_correct) {
+      d new_acpwr = arma::sum(Xsm);
+      Xsm *= ac_pwr / new_acpwr;
+    }
+  }
+
+  return Xsm;
+}

cpp_src/dsp/lasp_freqsmooth.h

@@ -0,0 +1,28 @@
+#pragma once
+#include <memory>
+#include <vector>
+
+#include "lasp_mathtypes.h"
+#include "lasp_types.h"
+
+/**
+ * \addtogroup dsp
+ * @{
+ */
+
+/**
+ * @brief Apply frequency domain smoothing to a Frequency domain (single
+ * sided)signal power spectrum
+ * 
+ * @param freq Frequency range
+ * @param X Signal pwr
+ * @param w Parameter determining the smoothing with. 1 = 1/1 octave, 3 = 1/3th
+ * octave and so on
+ * @param power_correct Apply a correction to the whole spectrum to make the
+ * signal power equal to the unsmoothed signal power.
+ * @return vd Smoothed spectrum
+ */
+vd freqSmooth(const vd& freq, const vd& X, const unsigned w,
+              bool power_correct = false);
+
+/** @} */

cpp_src/dsp/lasp_ppm.cpp

@@ -1,6 +1,8 @@
 /* #define DEBUGTRACE_ENABLED */
 #include "debugtrace.hpp"
 #include "lasp_ppm.h"
+#include "lasp_daqdata.h"
+#include "lasp_daq.h"
 #include <mutex>
 
 using std::cerr;
@@ -9,20 +11,20 @@ using std::endl;
 using Lck = std::scoped_lock<std::mutex>;
 using rte = std::runtime_error;
 
-PPMHandler::PPMHandler(StreamMgr &mgr, const d decay_dBps)
-  : ThreadedInDataHandler(mgr), _decay_dBps(decay_dBps) {
+PPMHandler::PPMHandler(SmgrHandle mgr, const d decay_dBps)
+  : ThreadedInDataHandler<PPMHandler>(mgr), _decay_dBps(decay_dBps) {
 
     DEBUGTRACE_ENTER;
+    startThread();
   }
 
-bool PPMHandler::inCallback_threaded(const DaqData &d) {
+void PPMHandler::inCallback(const DaqData &d) {
 
   DEBUGTRACE_ENTER;
   Lck lck(_mtx);
 
   dmat data = d.toFloat();
 
-
   const us nchannels = d.nchannels;
   assert(data.n_cols == nchannels);
 
@@ -62,12 +64,11 @@ bool PPMHandler::inCallback_threaded(const DaqData &d) {
       _cur_max(i) *= _alpha;
     }
   }
-  return true;
 }
 
 std::tuple<vd, arma::uvec> PPMHandler::getCurrentValue() const {
 
-  DEBUGTRACE_ENTER;
+  /* DEBUGTRACE_ENTER; */
   Lck lck(_mtx);
 
   arma::uvec clips(_clip_time.size(), arma::fill::zeros);
@@ -83,9 +84,11 @@ void PPMHandler::reset(const Daq *daq) {
 
   if (daq) {
 
+    DEBUGTRACE_PRINT("New daq found");
     _cur_max.fill(1e-80);
 
     const us nchannels = daq->neninchannels();
+    DEBUGTRACE_PRINT(nchannels);
     _max_range.resize(nchannels);
 
     dvec ranges = daq->inputRangeForEnabledChannels();
@@ -107,6 +110,5 @@ void PPMHandler::reset(const Daq *daq) {
 
 PPMHandler::~PPMHandler() {
   DEBUGTRACE_ENTER;
-  Lck lck(_mtx);
-  stop();
+  stopThread();
 }

cpp_src/dsp/lasp_ppm.h

@@ -4,7 +4,6 @@
 //
 // Description: Peak Programme Meter
 #pragma once
-#include <memory>
 #include "lasp_filter.h"
 #include "lasp_mathtypes.h"
 #include "lasp_threadedindatahandler.h"
@@ -23,7 +22,7 @@
  * with a certain amount of dB/s. If a new peak is found, it goes up again.
  * Also detects clipping.
  * */
-class PPMHandler: public ThreadedInDataHandler {
+class PPMHandler : public ThreadedInDataHandler<PPMHandler> {
 
   /**
    * @brief Assuming full scale of a signal is +/- 1.0. If a value is found 
@@ -69,11 +68,11 @@ class PPMHandler: public ThreadedInDataHandler {
   /**
    * @brief Constructs Peak Programme Meter
    *
-   * @param mgr Stream Mgr to operate on
+   * @param mgr Stream Mgr to install callbacks for
    * @param decay_dBps The level decay in units dB/s, after a peak has been
    * hit.
    */
-  PPMHandler(StreamMgr& mgr,const d decay_dBps = 20.0);
+  PPMHandler(SmgrHandle mgr,const d decay_dBps = 20.0);
   ~PPMHandler();
 
   /**
@@ -91,8 +90,8 @@ class PPMHandler: public ThreadedInDataHandler {
    *
    * @return true when stream should continue.
    */
-  bool inCallback_threaded(const DaqData& d) override final;
-  void reset(const Daq*) override final;
+  void inCallback(const DaqData& d);
+  void reset(const Daq*);
 
 };
 

cpp_src/dsp/lasp_rtaps.cpp

@@ -1,5 +1,7 @@
 /* #define DEBUGTRACE_ENABLED */
 #include "lasp_rtaps.h"
+#include "lasp_daqdata.h"
+#include "lasp_daq.h"
 #include "debugtrace.hpp"
 #include <mutex>
 
@@ -7,7 +9,7 @@ using std::cerr;
 using std::endl;
 using Lck = std::scoped_lock<std::mutex>;
 
-RtAps::RtAps(StreamMgr &mgr, const Filter *freqWeightingFilter,
+RtAps::RtAps(SmgrHandle mgr, const Filter *freqWeightingFilter,
     const us nfft,
     const Window::WindowType w,
     const d overlap_percentage, const d time_constant)
@@ -18,12 +20,12 @@ RtAps::RtAps(StreamMgr &mgr, const Filter *freqWeightingFilter,
       _filterPrototype = freqWeightingFilter->clone();
     }
 
+    startThread();
   }
 RtAps::~RtAps() {
-  Lck lck(_ps_mtx);
-  stop();
+  stopThread();
 }
-bool RtAps::inCallback_threaded(const DaqData &data) {
+void RtAps::inCallback(const DaqData &data) {
 
   DEBUGTRACE_ENTER;
 
@@ -33,9 +35,9 @@ bool RtAps::inCallback_threaded(const DaqData &data) {
   const us nchannels = fltdata.n_cols;
   if(nchannels != _sens.size()) {
     cerr << "**** Error: sensitivity size does not match! *****" << endl;
-    return false;
+    return;
   }
-  fltdata.each_row() %= _sens.as_row();
+  fltdata.each_row() /= _sens.as_row();
 
   if (_filterPrototype) {
 
@@ -61,7 +63,6 @@ bool RtAps::inCallback_threaded(const DaqData &data) {
 
   _ps.compute(fltdata);
 
-  return true;
 }
 void RtAps::reset(const Daq *daq) {
 

cpp_src/dsp/lasp_rtaps.h

@@ -23,7 +23,7 @@
  * @brief Real time spectral estimator using Welch method of spectral
  * estimation.
  */
-class RtAps : public ThreadedInDataHandler {
+class RtAps : public ThreadedInDataHandler<RtAps> {
 
   std::unique_ptr<Filter> _filterPrototype;
   std::vector<std::unique_ptr<Filter>> _freqWeightingFilters;
@@ -49,7 +49,7 @@ public:
    * 
    * For all other arguments, see constructor of AvPowerSpectra
    */
-  RtAps(StreamMgr &mgr, const Filter *freqWeightingFilter, const us nfft = 2048,
+  RtAps(SmgrHandle mgr, const Filter *freqWeightingFilter, const us nfft = 2048,
         const Window::WindowType w = Window::WindowType::Hann,
         const d overlap_percentage = 50., const d time_constant = -1);
   ~RtAps();
@@ -69,8 +69,8 @@ public:
    *
    * @return true if stream should continue.
    */
-  bool inCallback_threaded(const DaqData & d) override final;
-  void reset(const Daq *) override final;
+  void inCallback(const DaqData & d);
+  void reset(const Daq *);
 };
 
 /** @} */

cpp_src/dsp/lasp_rtsignalviewer.cpp

@@ -1,5 +1,7 @@
 /* #define DEBUGTRACE_ENABLED */
 #include "debugtrace.hpp"
+#include "lasp_daqdata.h"
+#include "lasp_daq.h"
 #include "lasp_rtsignalviewer.h"
 #include <algorithm>
 #include <mutex>
@@ -9,7 +11,7 @@ using std::endl;
 using Lck = std::scoped_lock<std::mutex>;
 using rte = std::runtime_error;
 
-RtSignalViewer::RtSignalViewer(StreamMgr &mgr, const d approx_time_hist,
+RtSignalViewer::RtSignalViewer(SmgrHandle mgr, const d approx_time_hist,
     const us resolution, const us channel)
   : ThreadedInDataHandler(mgr), _approx_time_hist(approx_time_hist),
   _resolution(resolution), _channel(channel) {
@@ -22,9 +24,10 @@ RtSignalViewer::RtSignalViewer(StreamMgr &mgr, const d approx_time_hist,
     if (resolution <= 1) {
       throw rte("Invalid resolution. Should be > 1");
     }
+    startThread();
   }
 
-bool RtSignalViewer::inCallback_threaded(const DaqData &data) {
+void RtSignalViewer::inCallback(const DaqData &data) {
 
   DEBUGTRACE_ENTER;
 
@@ -49,13 +52,10 @@ bool RtSignalViewer::inCallback_threaded(const DaqData &data) {
     _dat(_resolution-1, 1) = newmin;
     _dat(_resolution-1, 2) = newmax;
   }
-
-  return true;
 }
 
 RtSignalViewer::~RtSignalViewer() {
-  Lck lck(_sv_mtx);
-  stop();
+  stopThread();
 }
 void RtSignalViewer::reset(const Daq *daq) {
 

cpp_src/dsp/lasp_rtsignalviewer.h

@@ -4,12 +4,9 @@
 //
 // Description: Real Time Signal Viewer.
 #pragma once
-#include "lasp_avpowerspectra.h"
-#include "lasp_filter.h"
 #include "lasp_mathtypes.h"
 #include "lasp_threadedindatahandler.h"
 #include "lasp_timebuffer.h"
-#include <memory>
 #include <mutex>
 
 /**
@@ -24,7 +21,7 @@
  * @brief Real time signal viewer. Shows envelope of the signal based on amount
  * of history shown.
  */
-class RtSignalViewer : public ThreadedInDataHandler {
+class RtSignalViewer : public ThreadedInDataHandler<RtSignalViewer> {
 
   /**
    * @brief Storage for sensitivity values
@@ -71,7 +68,7 @@ public:
    * @param resolution Number of time points
    * @param channel The channel number
    */
-  RtSignalViewer(StreamMgr &mgr, const d approx_time_hist, const us resolution,
+  RtSignalViewer(SmgrHandle mgr, const d approx_time_hist, const us resolution,
                  const us channel);
 
   ~RtSignalViewer();
@@ -85,8 +82,8 @@ public:
    */
   dmat getCurrentValue() const;
 
-  bool inCallback_threaded(const DaqData &) override final;
-  void reset(const Daq *) override final;
+  void inCallback(const DaqData &);
+  void reset(const Daq *);
 };
 
 /** @} */

cpp_src/dsp/lasp_siggen.cpp

@@ -10,31 +10,62 @@ using rte = std::runtime_error;
 
 inline d level_amp(d level_dB) { return pow(10, level_dB / 20); }
 
-using mutexlock = std::scoped_lock<std::mutex>;
+using slock = std::scoped_lock<std::recursive_mutex>;
 
 vd Siggen::genSignal(const us nframes) {
 
   DEBUGTRACE_ENTER;
-  mutexlock lck(_mtx);
+  slock lck(_mtx);
 
   DEBUGTRACE_PRINT(nframes);
   vd signal(nframes, arma::fill::value(_dc_offset));
 
   if (!_muted) {
     vd signal_dynamic = _level_linear * genSignalUnscaled(nframes);
+
+    // Filter signal
     for (auto f : _filters) {
       assert(f.second);
       f.second->filter(signal_dynamic);
     }
-    signal += signal_dynamic;
-  }
+
+    // Check whether we are running / not for signal interruption.
+    bool activated = false;
+    if (_interrupt_period_s < 0) {
+      activated = true;
+    } else {
+      if (_interruption_frame_count < _interrupt_period_s*_fs) {
+        activated = true;
+      }
+      _interruption_frame_count += nframes;
+
+      if (_interruption_frame_count >=  2 * _interrupt_period_s*_fs) {
+        _interruption_frame_count = 0;
+      }
+    }
+
+    if (activated) {
+      signal += signal_dynamic;
+    }
+  } // end if(!_muted)
 
   return signal;
 }
+void Siggen::setInterruptPeriod(const d newPeriod) {
+  slock lck(_mtx);
+  if (newPeriod == 0) {
+    throw rte("Interruption period cannot be 0");
+  }
+  if (newPeriod < 0) {
+    _interrupt_period_s = -1;
+  } else {
+    _interrupt_period_s = newPeriod;
+  }
+}
 void Siggen::setFilter(const std::string &name,
                        std::shared_ptr<Filter> filter) {
   DEBUGTRACE_ENTER;
-  mutexlock lck(_mtx);
+  slock lck(_mtx);
   if (filter) {
     _filters[name] = filter;
   } else if (_filters.find(name) != _filters.end()) {
@@ -43,21 +74,22 @@ void Siggen::setFilter(const std::string &name,
 }
 void Siggen::setDCOffset(const d offset) {
   DEBUGTRACE_ENTER;
-  mutexlock lck(_mtx);
+  slock lck(_mtx);
   _dc_offset = offset;
 }
 void Siggen::setLevel(const d level, bool dB) {
   DEBUGTRACE_ENTER;
-  mutexlock lck(_mtx);
+  slock lck(_mtx);
   _level_linear = dB ? level_amp(level) : level;
 }
 void Siggen::reset(const d newFs) {
   DEBUGTRACE_ENTER;
-  mutexlock lck(_mtx);
+  slock lck(_mtx);
   _fs = newFs;
   for (auto &f : _filters) {
     assert(f.second);
     f.second->reset();
   }
+  _interruption_frame_count = 0;
   resetImpl();
 }

cpp_src/dsp/lasp_siggen.h

@@ -27,8 +27,15 @@ private:
   bool _muted = false;
 
 protected:
-  std::mutex _mtx;
+  mutable std::recursive_mutex _mtx;
   d _fs = 0;
+  /**
+   * @brief Interuption of period the signal. If set, the signal will be
+   * periodically turned on / off. This is useful for measuring reverberation
+   * times using the "interrupted noise method".
+   */
+  int _interrupt_period_s = -1;
+  int _interruption_frame_count = 0;
 
   virtual void resetImpl() = 0;
   virtual vd genSignalUnscaled(const us nframes) = 0;
@@ -36,6 +43,15 @@ protected:
 public:
   virtual ~Siggen() = default;
 
+  /**
+   * @brief Set the interruption period for interrupted signals. 
+   *
+   * @param newPeriod If < 0, the interruption is disabled. If > 0, an
+   * approximate interruption number of *buffers* is computed, rounded upwards
+   * for which the signal generator is turned off.
+   */
+  void setInterruptPeriod(const d newPeriod);
+
   /**
    * @brief Set a filter on the signal. For example to EQ the signal, or
    * otherwise to shape the spectrum. Filters are stored in a map, and
@@ -59,7 +75,7 @@ public:
    *
    * @param mute if tre
    */
-  void setMute(bool mute = true) { _muted = mute; }
+  void setMute(bool mute = true) { _muted = mute; _interruption_frame_count=0; }
 
   /**
    * @brief Set the level of the signal generator

cpp_src/dsp/lasp_siggen_impl.cpp

@@ -7,11 +7,14 @@
 //////////////////////////////////////////////////////////////////////
 /* #define DEBUGTRACE_ENABLED */
 #include "lasp_siggen_impl.h"
-#include "debugtrace.hpp"
-#include "lasp_mathtypes.h"
+
 #include <cassert>
 
+#include "debugtrace.hpp"
+#include "lasp_mathtypes.h"
+
 using rte = std::runtime_error;
+using slock = std::scoped_lock<std::recursive_mutex>;
 
 DEBUGTRACE_VARIABLES;
 
@@ -30,6 +33,7 @@ Sine::Sine(const d freq) : omg(2 * arma::datum::pi * freq) { DEBUGTRACE_ENTER; }
 
 vd Sine::genSignalUnscaled(const us nframes) {
   /* DEBUGTRACE_ENTER; */
+  slock lck(_mtx);
   const d pi = arma::datum::pi;
   vd phase_vec =
       arma::linspace(phase, phase + omg * (nframes - 1) / _fs, nframes);
@@ -41,8 +45,8 @@ vd Sine::genSignalUnscaled(const us nframes) {
 }
 
 vd Periodic::genSignalUnscaled(const us nframes) {
-
   vd res(nframes);
+  slock lck(_mtx);
   if (_signal.size() == 0) {
     throw rte("No signal defined while calling");
   }
@@ -74,15 +78,15 @@ Sweep::Sweep(const d fl, const d fu, const d Ts, const d Tq, const us flags)
 }
 
 void Sweep::resetImpl() {
-
   DEBUGTRACE_ENTER;
+  slock lck(_mtx);
 
   _cur_pos = 0;
 
   bool forward_sweep = flags & ForwardSweep;
   bool backward_sweep = flags & BackwardSweep;
 
-  const d Dt = 1 / _fs; // Deltat
+  const d Dt = 1 / _fs;  // Deltat
 
   // Estimate N, the number of samples in the sweep part (non-quiescent part):
   const us Ns = (us)(Ts * _fs);
@@ -166,7 +170,6 @@ void Sweep::resetImpl() {
       /* dVARTRACE(15, phase); */
     }
   } else if (flags & LogSweep) {
-
     DEBUGTRACE_PRINT("Log sweep");
     if (forward_sweep || backward_sweep) {
       /* Forward or backward sweep */
@@ -194,7 +197,6 @@ void Sweep::resetImpl() {
         phase += 2 * number_pi * Dt * fn;
       }
     } else {
-
       DEBUGTRACE_PRINT("Continuous sweep");
 
       const us Nf = Ns / 2;
@@ -249,17 +251,15 @@ void Sweep::resetImpl() {
         /* dbgassert(fn >= 0, "BUG"); */
 
         phase += 2 * number_pi * Dt * fn;
-        while (phase > 2 * number_pi)
-          phase -= 2 * number_pi;
+        while (phase > 2 * number_pi) phase -= 2 * number_pi;
         /* dVARTRACE(17, phase); */
       }
       /* This should be a very small number!! */
       DEBUGTRACE_PRINT(phase);
     }
-  } // End of log sweep
+  }  // End of log sweep
   else {
     // Either log or linear sweep had to be given as flags.
     assert(false);
-
   }
 }

cpp_src/dsp/lasp_siggen_impl.h

@@ -18,8 +18,8 @@ class Noise : public Siggen {
   d level_linear;
   virtual vd genSignalUnscaled(const us nframes) override;
   void resetImpl() override;
-  public:
 
+ public:
   /**
    * @brief Constructs a noise generator. If no filter is used, the output will
    * be white noise. By default, the output will be standard deviation = 1
@@ -28,7 +28,6 @@ class Noise : public Siggen {
    */
   Noise();
   ~Noise() = default;
-
 };
 
 /**
@@ -37,13 +36,12 @@ class Noise : public Siggen {
 class Sine : public Siggen {
   d phase = 0;
   d omg;
-  protected:
 
-  void resetImpl() override final { phase=0; }
+ protected:
+  void resetImpl() override final { phase = 0; }
   virtual vd genSignalUnscaled(const us nframes) override final;
 
-  public:
-
+ public:
   /**
    * @brief Create a sine wave generator
    *
@@ -51,7 +49,7 @@ class Sine : public Siggen {
    */
   Sine(const d freq_Hz);
   ~Sine() = default;
-  void setFreq(const d newFreq) { omg = 2*arma::datum::pi*newFreq; } ;
+  void setFreq(const d newFreq) { omg = 2 * arma::datum::pi * newFreq; };
 };
 
 /**
@@ -86,8 +84,7 @@ class Sweep : public Periodic {
 
   void resetImpl() override;
 
-  public:
-
+ public:
   static constexpr int ForwardSweep = 1 << 0;
   static constexpr int BackwardSweep = 1 << 1;
   static constexpr int LinearSweep = 1 << 2;
@@ -103,11 +100,11 @@ class Sweep : public Periodic {
    * avoid temporal aliasing in case of measuring impulse responses.
    * @param[in] sweep_flags: Sweep period [s]
    */
-  Sweep(const d fl, const d fu, const d Ts, const d Tq,
-      const us sweep_flags);
+  Sweep(const d fl, const d fu, const d Ts, const d Tq, const us sweep_flags);
 
   ~Sweep() = default;
 
+
 };
 /** @} */
 /** @} */

cpp_src/dsp/lasp_slm.cpp

@@ -37,9 +37,6 @@ SLM::SLM(const d fs, const d Lref, const us downsampling_fac, const d tau,
   DEBUGTRACE_ENTER;
   DEBUGTRACE_PRINT(_alpha);
 
-  // Make sure thread pool is running
-  getPool();
-
   if (Lref <= 0) {
     throw rte("Invalid reference level");
   }

cpp_src/dsp/lasp_slm.h

@@ -1,6 +1,7 @@
 #pragma once
 #include "lasp_biquadbank.h"
 #include "lasp_filter.h"
+#include "lasp_thread.h"
 #include <memory>
 #include <optional>
 
@@ -14,6 +15,7 @@
  * channel. A channel is the result  of a filtered signal
  */
 class SLM {
+  GlobalThreadPool _pool;
   /**
    * @brief A, C or Z weighting, depending on the pre-filter installed.
    */

cpp_src/dsp/lasp_thread.cpp

@@ -0,0 +1,36 @@
+/* #define DEBUGTRACE_ENABLED */
+#include "lasp_thread.h"
+#include "BS_thread_pool.hpp"
+#include "debugtrace.hpp"
+#include <memory>
+
+/**
+ * @brief Store a global weak_ptr, that is used to create new shared pointers
+ * if any other shared pointers are still alive. If not, we create a new
+ * instance.
+ */
+std::weak_ptr<BS::thread_pool> _global_weak_pool;
+
+/**
+ * @brief Global mutex, used to restrict the pool creation to a single thread
+ * at once.
+ */
+std::mutex _mtx;
+
+using Lck = std::scoped_lock<std::mutex>;
+using rte = std::runtime_error;
+
+GlobalThreadPool::GlobalThreadPool() {
+  DEBUGTRACE_ENTER;
+  Lck lck(_mtx);
+  /// See if we can get it from the global ptr. If not, time to allocate it.
+  _pool = _global_weak_pool.lock();
+  if (!_pool) {
+    _pool = std::make_shared<BS::thread_pool>();
+    if (!_pool) {
+      throw rte("Fatal: could not allocate thread pool!");
+    }
+    // Update global weak pointer
+    _global_weak_pool = _pool;
+  }
+}

cpp_src/dsp/lasp_thread.h

@@ -0,0 +1,41 @@
+#pragma once
+#include "BS_thread_pool.hpp"
+
+/**
+ * @brief Simple wrapper around BS::thread_pool that makes a BS::thread_pool a
+ * singleton, such that a thread pool can be used around in the code, and
+ * safely spawn threads also from other threads. Only wraps a submit() and
+ * push_task for now.
+ */
+class GlobalThreadPool {
+
+  /**
+   * @brief Shared access to the thread pool.
+   */
+  std::shared_ptr<BS::thread_pool> _pool;
+
+public:
+  /**
+   * @brief Instantiate handle to the thread pool.
+   */
+  GlobalThreadPool();
+  GlobalThreadPool(const GlobalThreadPool &) = default;
+  GlobalThreadPool &operator=(const GlobalThreadPool &) = default;
+
+  /**
+   * @brief Wrapper around BS::thread_pool::submit(...)
+   */
+  template <
+      typename F, typename... A,
+      typename R = std::invoke_result_t<std::decay_t<F>, std::decay_t<A>...>>
+  [[nodiscard]] std::future<R> submit(F &&task, A &&...args) {
+
+    return _pool->submit(task, args...);
+  }
+  /**
+   * @brief Wrapper around BS::thread_pool::push_task(...)
+   */
+  template <typename F, typename... A> void push_task(F &&task, A &&...args) {
+    _pool->push_task(task, args...);
+  }
+};

cpp_src/dsp/lasp_threadedindatahandler.cpp

@@ -0,0 +1,142 @@
+// #define DEBUGTRACE_ENABLED
+#include "lasp_threadedindatahandler.h"
+
+#include <future>
+#include <optional>
+#include <queue>
+#include <thread>
+
+#include "debugtrace.hpp"
+#include "lasp_daqdata.h"
+#include "lasp_thread.h"
+
+using namespace std::literals::chrono_literals;
+using lck = std::scoped_lock<std::mutex>;
+using rte = std::runtime_error;
+using std::cerr;
+using std::endl;
+using std::placeholders::_1;
+
+class SafeQueue {
+  std::queue<DaqData> _queue;
+  std::mutex _mtx;
+  std::atomic<uint32_t> _contents{0};
+
+ public:
+  void push(const DaqData &d) {
+    DEBUGTRACE_ENTER;
+    lck lock(_mtx);
+    _queue.push(d);
+    _contents++;
+    assert(_contents == _queue.size());
+  }
+  DaqData pop() {
+    DEBUGTRACE_ENTER;
+    if (empty()) {
+      throw rte("BUG: Pop on empty queue");
+    }
+    lck lock(_mtx);
+
+    /* DaqData d(std::move(_queue.front())); */
+    DaqData d(_queue.front());
+    _queue.pop();
+    _contents--;
+    assert(_contents == _queue.size());
+    return d;
+  }
+  /**
+   * @brief Empty implemented using atomic var, safes some mutex lock/unlock
+   * cycles.
+   *
+   * @return true if queue is empty
+   */
+  bool empty() const { return _contents == 0; }
+};
+
+ThreadedInDataHandlerBase::ThreadedInDataHandlerBase(SmgrHandle mgr,
+                                                     InCallbackType cb,
+                                                     ResetCallbackType reset)
+    : _queue(std::make_unique<SafeQueue>()),
+      inCallback(cb),
+      resetCallback(reset),
+      _smgr(mgr) {
+  DEBUGTRACE_ENTER;
+}
+void ThreadedInDataHandlerBase::startThread() {
+  DEBUGTRACE_ENTER;
+  if (_indatahandler) {
+    throw rte("BUG: ThreadedIndataHandler already started");
+  }
+  SmgrHandle smgr = _smgr.lock();
+  if (!smgr) {
+    cerr << "Stream manager destructed" << endl;
+    return;
+  }
+  _indatahandler = std::make_unique<InDataHandler>(
+      smgr,
+      std::bind(&ThreadedInDataHandlerBase::_inCallbackFromInDataHandler, this,
+                _1),
+      resetCallback);
+
+  _thread_allowed_to_run = true;
+  _indatahandler->start();
+}
+
+void ThreadedInDataHandlerBase::_inCallbackFromInDataHandler(
+    const DaqData &daqdata) {
+  DEBUGTRACE_ENTER;
+
+  // Early return in case object is under DESTRUCTION
+  if (!_thread_allowed_to_run) return;
+
+  _queue->push(daqdata);
+  if (!_thread_running) {
+    DEBUGTRACE_PRINT("Pushing new thread in pool");
+    _thread_running = true;
+    _pool.push_task(&ThreadedInDataHandlerBase::threadFcn, this);
+  }
+}
+
+void ThreadedInDataHandlerBase::stopThread() {
+  DEBUGTRACE_ENTER;
+  if (!_indatahandler) {
+    throw rte("BUG: ThreadedIndataHandler not running");
+  }
+
+  // Stop the existing thread
+  _thread_allowed_to_run = false;
+
+  // Make sure no new data arrives
+  _indatahandler->stop();
+  _indatahandler.reset();
+
+  DEBUGTRACE_PRINT("Indatahandler stopped. Waiting for thread to finish...");
+  // Then wait in steps for the thread to stop running.
+  while (_thread_running) {
+    std::this_thread::sleep_for(10us);
+  }
+  DEBUGTRACE_PRINT("Thread stopped");
+  // Kill the handler
+  DEBUGTRACE_PRINT("Handler resetted");
+}
+
+ThreadedInDataHandlerBase::~ThreadedInDataHandlerBase() {
+  DEBUGTRACE_ENTER;
+  if (_thread_allowed_to_run) {
+    stopThread();
+    cerr << "*** BUG: InDataHandlers have not been all stopped, while "
+            "StreamMgr destructor is called. This is a misuse BUG."
+         << endl;
+    abort();
+  }
+}
+
+void ThreadedInDataHandlerBase::threadFcn() {
+  DEBUGTRACE_ENTER;
+
+  while (!_queue->empty() && _thread_allowed_to_run) {
+    // Call inCallback_threaded
+    inCallback(_queue->pop());
+  }
+  _thread_running = false;
+}

cpp_src/dsp/lasp_threadedindatahandler.h

@@ -0,0 +1,123 @@
+#pragma once
+#include "debugtrace.hpp"
+#include "lasp_indatahandler.h"
+#include "lasp_thread.h"
+#include <atomic>
+#include <memory>
+#include <mutex>
+
+using std::placeholders::_1;
+const us RINGBUFFER_SIZE = 1024;
+
+/**
+ * \addtogroup dsp
+ * @{
+ *
+ * \defgroup rt Real time signal handlers
+ * @{
+ */
+
+class SafeQueue;
+/**
+ * @brief Threaded in data handler base. Buffers inCallback data and calls a
+ * callback with the same signature on a different thread. The main function of
+ * this is to offload the thread that handles the stream, such that expensive
+ * computations do not result in stream buffer xruns.
+ */
+class ThreadedInDataHandlerBase {
+  /**
+   * @brief The queue used to push elements to the handling thread.
+   */
+
+  std::unique_ptr<SafeQueue> _queue;
+
+  /**
+   * @brief Function pointer that is called when new DaqData arrives.
+   */
+  const InCallbackType inCallback;
+
+  /**
+   * @brief Function pointer that is called when reset() is called.
+   */
+  const ResetCallbackType resetCallback;
+
+  std::weak_ptr<StreamMgr> _smgr;
+  
+  std::unique_ptr<InDataHandler> _indatahandler;
+
+  std::atomic<bool> _thread_running{false};
+  std::atomic<bool> _thread_allowed_to_run{false};
+
+  GlobalThreadPool _pool;
+
+  void threadFcn();
+
+
+  /**
+   * @brief Pushes a copy of the daqdata to the thread queue and returns.
+   * Adds a thread to handle the queue, whihc will call inCallback();
+   *
+   * @param daqdata the daq info to push
+   *
+   * @return true, to continue with sampling.
+   */
+  void _inCallbackFromInDataHandler(const DaqData &daqdata);
+
+  public:
+  ThreadedInDataHandlerBase(SmgrHandle mgr, InCallbackType cb, ResetCallbackType reset);
+  ~ThreadedInDataHandlerBase();
+  /**
+   * @brief This method should be called from the derived class' constructor,
+   * to start the thread and data is incoming.
+   */
+  void startThread();
+  /**
+   * @brief This method SHOULD be called from all classes that derive on
+   * ThreadedInDataHandler. It is to make sure the inCallback_threaded()
+   * function is no longer called when the destructor of the derived class is
+   * called. Not calling this function is regarded as a BUG.
+   */
+  void stopThread();
+
+};
+
+/**
+ * @brief A bit of curiously recurring template pattern, to connect the
+ * specific handlers and connect the proper callbacks in a type-agnostic way.
+ * Using this class, each threaded handler should just implement its reset()
+ * and inCallback() method. Ellides the virtual method calls.
+ *
+ * Usage: class XHandler: public ThreadedInDataHandler<XHandler> {
+ * public:
+ * XHandler(streammgr) : ThreadedInDataHandler(streammgr) {}
+ * void inCallback(const DaqData& d) { ... do something with d }
+ * void reset(const Daq* daq) { ... do something with daq }
+ * };
+ *
+ * For examples, see PPMHandler, etc.
+ *
+ * @tparam Derived The
+ */
+template <typename Derived>
+class ThreadedInDataHandler : public ThreadedInDataHandlerBase {
+  public:
+  ThreadedInDataHandler(SmgrHandle mgr):
+    ThreadedInDataHandlerBase(mgr, 
+        std::bind(&ThreadedInDataHandler::_inCallback, this, _1),
+        std::bind(&ThreadedInDataHandler::_reset, this, _1))
+  {
+
+  }
+
+  void _reset(const Daq* daq) {
+    DEBUGTRACE_ENTER;
+    return static_cast<Derived*>(this)->reset(daq);
+  }
+  void _inCallback(const DaqData& data) {
+    DEBUGTRACE_ENTER;
+    return static_cast<Derived*>(this)->inCallback(data);
+  }
+};
+
+/** @} */
+/** @} */

cpp_src/dsp/lasp_window.cpp

@@ -11,7 +11,7 @@ using std::cerr;
 using std::endl;
 
 // Safe some typing. Linspace form 0 up to (and NOT including N).
-#define lin0N arma::linspace(0, N - 1, N)
+#define lin0N arma::linspace<vd>(0, N - 1, N)
 
 vd Window::hann(const us N) {
   return arma::pow(arma::sin((arma::datum::pi/N) * lin0N), 2);
@@ -24,8 +24,8 @@ vd Window::blackman(const us N) {
   d a0 = 7938. / 18608.;
   d a1 = 9240. / 18608.;
   d a2 = 1430. / 18608.;
-  return a0 - a1 * d_cos((2 * number_pi/N) * lin0N) +
-         a2 * d_cos((4 * number_pi / N)* lin0N );
+  return a0 - a1 * arma::cos((2 * number_pi/N) * lin0N) +
+         a2 * arma::cos((4 * number_pi / N)* lin0N );
 }
 
 vd Window::rectangular(const us N) { return arma::ones(N); }

cpp_src/lasp_config.h.in

@@ -9,9 +9,6 @@
 #ifndef LASP_CONFIG_H
 #define LASP_CONFIG_H
 
-const int LASP_VERSION_MAJOR = @CMAKE_PROJECT_VERSION_MAJOR@;
-const int LASP_VERSION_MINOR = @CMAKE_PROJECT_VERSION_MINOR@;
-
 /* Debug flag */
 #cmakedefine01 LASP_DEBUG
 
@@ -31,6 +28,7 @@ const int LASP_VERSION_MINOR = @CMAKE_PROJECT_VERSION_MINOR@;
 
 #cmakedefine LASP_FFT_BACKEND @LASP_FFT_BACKEND@
 #cmakedefine01 LASP_HAS_RTAUDIO
+#cmakedefine01 LASP_HAS_PORTAUDIO
 #cmakedefine01 LASP_HAS_ULDAQ
 #cmakedefine01 LASP_DOUBLE_PRECISION
 #cmakedefine01 LASP_USE_BLAS

cpp_src/lasp_cpp.cpp

@@ -44,6 +44,12 @@ void init_siggen(py::module &m);
 
 PYBIND11_MODULE(lasp_cpp, m) {
 
+#if LASP_DOUBLE_PRECISION == 1
+  m.attr("LASP_DOUBLE_PRECISION") = true;
+#else
+  m.attr("LASP_DOUBLE_PRECISION") = false;
+#endif
+
   init_dsp(m);
   init_deviceinfo(m);
   init_daqconfiguration(m);
@@ -51,13 +57,5 @@ PYBIND11_MODULE(lasp_cpp, m) {
   init_streammgr(m);
   init_datahandler(m);
   init_siggen(m);
-
-  // We store the version number of the code via CMake, and create an
-  // attribute in the C++ code.
-  m.attr("__version__") = std::to_string(LASP_VERSION_MAJOR) + "." +
-                          std::to_string(LASP_VERSION_MINOR);
-
-  m.attr("LASP_VERSION_MAJOR") = LASP_VERSION_MAJOR;
-  m.attr("LASP_VERSION_MINOR") = LASP_VERSION_MINOR;
 }
 /** @} */

cpp_src/pybind11/lasp_deviceinfo.cpp

@@ -1,5 +1,6 @@
 #include <pybind11/stl.h>
 #include <stdint.h>
+#include <iostream>
 #include "lasp_deviceinfo.h"
 
 using std::cerr;
@@ -28,6 +29,9 @@ void init_deviceinfo(py::module& m) {
   devinfo.def_readonly("availableInputRanges",
                        &DeviceInfo::availableInputRanges);
   devinfo.def_readonly("prefInputRangeIndex", &DeviceInfo::prefInputRangeIndex);
+  devinfo.def_readonly("availableOutputRanges",
+                       &DeviceInfo::availableOutputRanges);
+  devinfo.def_readonly("prefOutputRangeIndex", &DeviceInfo::prefOutputRangeIndex);
 
   devinfo.def_readonly("ninchannels", &DeviceInfo::ninchannels);
   devinfo.def_readonly("noutchannels", &DeviceInfo::noutchannels);
@@ -35,7 +39,10 @@ void init_deviceinfo(py::module& m) {
   devinfo.def_readonly("hasInputACCouplingSwitch",
                        &DeviceInfo::hasInputACCouplingSwitch);
 
+  devinfo.def_readonly("hasDuplexMode", &DeviceInfo::hasDuplexMode);
+  devinfo.def_readonly("duplexModeForced", &DeviceInfo::duplexModeForced);
+  devinfo.def_readonly("hasInternalOutputMonitor", &DeviceInfo::hasInternalOutputMonitor);
+  
+  devinfo.def_readonly("physicalInputQty", &DeviceInfo::physicalInputQty);
   devinfo.def_readonly("physicalOutputQty", &DeviceInfo::physicalOutputQty);
-
 }
-

cpp_src/pybind11/lasp_dsp_pybind.cpp

@@ -1,13 +1,16 @@
+#include <pybind11/pybind11.h>
+
+#include <iostream>
+
 #include "arma_npy.h"
 #include "lasp_avpowerspectra.h"
 #include "lasp_biquadbank.h"
 #include "lasp_fft.h"
 #include "lasp_filter.h"
+#include "lasp_freqsmooth.h"
 #include "lasp_slm.h"
 #include "lasp_streammgr.h"
 #include "lasp_window.h"
-#include <iostream>
-#include <pybind11/pybind11.h>
 
 using std::cerr;
 using std::endl;
@@ -27,7 +30,6 @@ using rte = std::runtime_error;
  */
 
 void init_dsp(py::module &m) {
-
   py::class_<Fft> fft(m, "Fft");
   fft.def(py::init<us>());
   fft.def("fft", [](Fft &f, dpyarray dat) {
@@ -114,9 +116,10 @@ void init_dsp(py::module &m) {
 
   aps.def("compute", [](AvPowerSpectra &aps, dpyarray timedata) {
     std::optional<ccube> res;
+    dmat timedata_mat = NpyToMat<d, false>(timedata);
     {
       py::gil_scoped_release release;
-      res = aps.compute(NpyToMat<d, false>(timedata));
+      res = aps.compute(timedata_mat);
     }
 
     return CubeToNpy<c>(res.value_or(ccube(0, 0, 0)));
@@ -151,5 +154,12 @@ void init_dsp(py::module &m) {
   slm.def("Lmax", [](const SLM &slm) { return ColToNpy<d>(slm.Lmax()); });
   slm.def("Lpeak", [](const SLM &slm) { return ColToNpy<d>(slm.Lpeak()); });
   slm.def_static("suggestedDownSamplingFac", &SLM::suggestedDownSamplingFac);
+
+  // Frequency smoother
+  m.def("freqSmooth", [](dpyarray freq, dpyarray X, unsigned w) {
+    vd freqa = NpyToCol<d, false>(freq);
+    vd Xa = NpyToCol<d, false>(X);
+    return ColToNpy(freqSmooth(freqa, Xa, w));
+  });
 }
 /** @} */

cpp_src/pybind11/lasp_pyindatahandler.cpp

@@ -0,0 +1,353 @@
+// #define DEBUGTRACE_ENABLED
+#include <pybind11/pybind11.h>
+#include <pybind11/pytypes.h>
+
+#include <armadillo>
+#include <atomic>
+
+#include "arma_npy.h"
+#include "debugtrace.hpp"
+#include "lasp_clip.h"
+#include "lasp_daq.h"
+#include "lasp_daqdata.h"
+#include "lasp_ppm.h"
+#include "lasp_rtaps.h"
+#include "lasp_rtsignalviewer.h"
+#include "lasp_streammgr.h"
+#include "lasp_threadedindatahandler.h"
+
+using namespace std::literals::chrono_literals;
+using std::cerr;
+using std::endl;
+using rte = std::runtime_error;
+using Lck = std::scoped_lock<std::recursive_mutex>;
+
+namespace py = pybind11;
+
+/**
+ * @brief Generate a Numpy array from daqdata, does *NOT* create a copy of the
+ * data!. Instead, it shares the data from the DaqData container.
+ *
+ * @tparam T The type of the stored sample
+ * @param d The daqdata to convert
+ *
+ * @return Numpy array
+ */
+template <typename T, bool copy = false>
+py::array_t<T> getPyArrayNoCpy(const DaqData &d) {
+  // https://github.com/pybind/pybind11/issues/323
+  //
+  // When a valid object is passed as 'base', it tells pybind not to take
+  // ownership of the data, because 'base' will own it. In fact 'packet' will
+  // own it, but - psss! - , we don't tell it to pybind... Alos note that ANY
+  // valid object is good for this purpose, so I choose "str"...
+
+  py::str dummyDataOwner;
+  /*
+   * Signature:
+   array_t(ShapeContainer shape,
+   StridesContainer strides,
+   const T *ptr = nullptr,
+   handle base = handle());
+   */
+
+  return py::array_t<T>(
+      py::array::ShapeContainer({d.nframes, d.nchannels}),  // Shape
+
+      py::array::StridesContainer(  // Strides
+          {sizeof(T),
+           sizeof(T) * d.nframes}),  // Strides (in bytes) for each index
+
+      reinterpret_cast<T *>(
+          const_cast<DaqData &>(d).raw_ptr()),  // Pointer to buffer
+
+      dummyDataOwner  // As stated above, now Numpy does not take ownership of
+                      // the data pointer.
+  );
+}
+
+template <typename T, bool copy = false>
+py::array_t<d> dmat_to_ndarray(const DaqData &d) {
+  // https://github.com/pybind/pybind11/issues/323
+  //
+  // When a valid object is passed as 'base', it tells pybind not to take
+  // ownership of the data, because 'base' will own it. In fact 'packet' will
+  // own it, but - psss! - , we don't tell it to pybind... Alos note that ANY
+  // valid object is good for this purpose, so I choose "str"...
+
+  py::str dummyDataOwner;
+  /*
+   * Signature:
+   array_t(ShapeContainer shape,
+   StridesContainer strides,
+   const T *ptr = nullptr,
+   handle base = handle());
+   */
+
+  return py::array_t<T>(
+      py::array::ShapeContainer({d.nframes, d.nchannels}),  // Shape
+
+      py::array::StridesContainer(  // Strides
+          {sizeof(T),
+           sizeof(T) * d.nframes}),  // Strides (in bytes) for each index
+
+      reinterpret_cast<T *>(
+          const_cast<DaqData &>(d).raw_ptr()),  // Pointer to buffer
+
+      dummyDataOwner  // As stated above, now Numpy does not take ownership of
+                      // the data pointer.
+  );
+}
+
+/**
+ * @brief Wraps the ThreadedInDataHandler such that it calls a Python callback
+ * with a buffer of sample data. Converts DaqData objects to Numpy arrays and
+ * calls Python given as argument to the constructor
+ */
+class PyIndataHandler : public ThreadedInDataHandler<PyIndataHandler> {
+  /**
+   * @brief The callback functions that is called.
+   */
+  py::object _cb, _reset_callback;
+  std::atomic<bool> _done{false};
+  std::recursive_mutex _mtx;
+
+ public:
+  /**
+   * @brief Initialize PyIndataHandler
+   *
+   * @param mgr StreamMgr handle
+   * @param cb Python callback that is called with Numpy input data from device
+   * @param reset_callback Python callback that is called with a Daq pointer.
+   * Careful: do not store this handle, as it is only valid as long as reset()
+   * is called, when a stream stops, this pointer / handle will dangle.
+   */
+  PyIndataHandler(SmgrHandle mgr, py::function cb, py::function reset_callback)
+      : ThreadedInDataHandler(mgr),
+        _cb(py::weakref(cb)),
+        _reset_callback(py::weakref(reset_callback)) {
+    DEBUGTRACE_ENTER;
+    // cerr << "Thread ID: " << std::this_thread::get_id() << endl;
+    /// Start should be called externally, as at constructor time no virtual
+    /// functions should be called.
+    if (_cb().is_none() || _reset_callback().is_none()) {
+      throw rte("cb or reset_callback is none!");
+    }
+    startThread();
+  }
+  ~PyIndataHandler() {
+    DEBUGTRACE_ENTER;
+    // cerr << "Thread ID: " << std::this_thread::get_id() << endl;
+    /// Callback cannot be called, which results in a deadlock on the GIL
+    /// without this release.
+    py::gil_scoped_release release;
+    DEBUGTRACE_PRINT("Gil released");
+    _done = true;
+    stopThread();
+  }
+  /**
+   * @brief Calls the reset callback in Python.
+   *
+   * @param daq Daq device, or nullptr in case no input stream is running.
+   */
+  void reset(const Daq *daqi) {
+    DEBUGTRACE_ENTER;
+    // cerr << "Thread ID: " << std::this_thread::get_id() << endl;
+    if (_done) return;
+    {
+      try {
+        py::object reset_callback = _reset_callback();
+        if (reset_callback.is_none()) {
+          DEBUGTRACE_PRINT("reset_callback is none, weakref killed");
+          _done = true;
+          return;
+        }
+        if (daqi != nullptr) {
+          assert(reset_callback);
+          reset_callback(daqi);
+        } else {
+          assert(reset_callback);
+          reset_callback(py::none());
+        }
+      } catch (py::error_already_set &e) {
+        cerr << "*************** Error calling reset callback!\n";
+        cerr << e.what() << endl;
+        cerr << "*************** \n";
+        /// Throwing a runtime error here does not work out one way or another.
+        /// Therefore, it is better to dive out and prevent undefined behaviour
+        abort();
+        /* throw std::runtime_error(e.what()); */
+      } catch (std::exception &e) {
+        cerr << "Caught unknown exception in reset callback:" << e.what()
+             << endl;
+        abort();
+      }
+    }  // end of GIL scope
+  }    // end of function reset()
+
+  /**
+   * @brief Calls the Python callback method / function with a Numpy array of
+   * stream data.
+   */
+  void inCallback(const DaqData &d) {
+    DEBUGTRACE_ENTER;
+    // cerr << "=== Enter incallback for thread ID: " << std::this_thread::get_id() << endl;
+
+    using DataType = DataTypeDescriptor::DataType;
+    if (_done) {
+      DEBUGTRACE_PRINT("Early stop, done");
+      return;
+    }
+    {
+      DEBUGTRACE_PRINT("================ TRYING TO OBTAIN GIL in inCallback...");
+      py::gil_scoped_acquire acquire;
+      try {
+        py::object py_bool;
+        py::object cb = _cb();
+        if (cb.is_none()) {
+          DEBUGTRACE_PRINT("cb is none, weakref killed");
+          _done = true;
+          return;
+        }
+        switch (d.dtype) {
+          case (DataType::dtype_int8): {
+            py_bool = cb(getPyArrayNoCpy<int8_t>(d));
+          } break;
+          case (DataType::dtype_int16): {
+            py_bool = cb(getPyArrayNoCpy<int16_t>(d));
+          } break;
+          case (DataType::dtype_int32): {
+            py_bool = cb(getPyArrayNoCpy<int32_t>(d));
+          } break;
+          case (DataType::dtype_fl32): {
+            py_bool = cb(getPyArrayNoCpy<float>(d));
+          } break;
+          case (DataType::dtype_fl64): {
+            py_bool = cb(getPyArrayNoCpy<double>(d));
+          } break;
+          default:
+            throw std::runtime_error("BUG");
+        }  // End of switch
+
+        bool res = py_bool.cast<bool>();
+        if (res == false) {
+          DEBUGTRACE_PRINT("Setting callbacks to None")
+          _done = true;
+
+          // By doing this, we remove the references, but in the mean time this
+          // might also trigger removing Python objects. Including itself, as
+          // there is no reference to it anymore. The consequence is that the
+          // current object might be destroyed from this thread. However, if we
+          // do not remove these references and in lasp_record.py finish() is
+          // not called, we end up with not-garbage collected recordings in
+          // memory. This is also not good. How can we force Python to not yet
+          // destroy this object?
+          // cb.reset();
+          // reset_callback.reset();
+        }
+      } catch (py::error_already_set &e) {
+        cerr << "ERROR (BUG): Python raised exception from callback function: ";
+        cerr << e.what() << endl;
+        abort();
+      } catch (py::cast_error &e) {
+        cerr << e.what() << endl;
+        cerr << "ERROR (BUG): Python callback does not return boolean value."
+             << endl;
+        abort();
+      } catch (std::exception &e) {
+        cerr << "Caught unknown exception in Python callback:" << e.what()
+             << endl;
+        abort();
+      }
+
+    }  // End of scope in which the GIL is acquired
+    // cerr << "=== LEAVE incallback for thread ID: " << std::this_thread::get_id() << endl;
+
+  }    // End of function inCallback()
+};
+
+void init_datahandler(py::module &m) {
+  /// The C++ class is PyIndataHandler, but for Python, it is called
+  /// InDataHandler
+  py::class_<PyIndataHandler> pyidh(m, "InDataHandler");
+  pyidh.def(py::init<SmgrHandle, py::function, py::function>());
+
+  /// Peak Programme Meter
+  py::class_<PPMHandler> ppm(m, "PPMHandler");
+  ppm.def(py::init<SmgrHandle, const d>());
+  ppm.def(py::init<SmgrHandle>());
+
+  ppm.def("getCurrentValue", [](const PPMHandler &ppm) {
+    std::tuple<vd, arma::uvec> tp;
+    {
+      py::gil_scoped_release release;
+      tp = ppm.getCurrentValue();
+    }
+
+    return py::make_tuple(ColToNpy<d>(std::get<0>(tp)),
+                          ColToNpy<arma::uword>(std::get<1>(tp)));
+  });
+
+  /// Clip Detector
+  py::class_<ClipHandler> clip(m, "ClipHandler");
+  clip.def(py::init<SmgrHandle>());
+
+  clip.def("getCurrentValue", [](const ClipHandler &clip) {
+    arma::uvec cval;
+    {
+      py::gil_scoped_release release;
+      cval = clip.getCurrentValue();
+    }
+
+    return ColToNpy<arma::uword>(cval);  // something goes wrong here
+  });
+
+  /// Real time Aps
+  ///
+  py::class_<RtAps> rtaps(m, "RtAps");
+  rtaps.def(py::init<SmgrHandle,                // StreamMgr
+                     Filter *const,             // FreqWeighting filter
+                     const us,                  // Nfft
+                     const Window::WindowType,  // Window
+                     const d,                   // Overlap percentage 0<=o<100
+
+                     const d  // Time constant
+                     >(),
+            py::arg("streammgr"),  // StreamMgr
+            py::arg("preFilter").none(true),
+            /// Below list of arguments *SHOULD* be same as for
+
+            /// AvPowerSpectra constructor!
+            py::arg("nfft") = 2048,                            //
+            py::arg("windowType") = Window::WindowType::Hann,  //
+            py::arg("overlap_percentage") = 50.0,              //
+            py::arg("time_constant") = -1                      //
+  );
+
+  rtaps.def("getCurrentValue", [](RtAps &rt) {
+    ccube val;
+    {
+      py::gil_scoped_release release;
+      val = rt.getCurrentValue();
+    }
+    return CubeToNpy<c>(val);
+  });
+
+  /// Real time Signal Viewer
+  ///
+  py::class_<RtSignalViewer> rtsv(m, "RtSignalViewer");
+  rtsv.def(py::init<SmgrHandle,  // StreamMgr
+                    const d,     // Time history
+                    const us,    // Resolution
+                    const us     // Channel number
+                    >());
+
+  rtsv.def("getCurrentValue", [](RtSignalViewer &rt) {
+    dmat val;
+    {
+      py::gil_scoped_release release;
+      val = rt.getCurrentValue();
+    }
+    return MatToNpy<d>(val);
+  });
+}

cpp_src/pybind11/lasp_siggen.cpp

@@ -30,6 +30,7 @@ void init_siggen(py::module &m) {
   siggen.def("setLevel", &Siggen::setLevel, py::arg("newLevel"),
              py::arg("dB") = true);
   siggen.def("reset", &Siggen::reset);
+  siggen.def("setInterruptPeriod", &Siggen::setInterruptPeriod);
 
   siggen.def("setFilter", &Siggen::setFilter);
 

cpp_src/pybind11/lasp_streammgr.cpp

@@ -1,4 +1,5 @@
 #include "lasp_streammgr.h"
+#include "lasp_indatahandler.h"
 #include <pybind11/numpy.h>
 #include <pybind11/pybind11.h>
 #include <pybind11/stl.h>
@@ -12,7 +13,7 @@ void init_streammgr(py::module &m) {
 
   /// The stream manager is a singleton, and the lifetime is managed elsewhere.
   // It should not be deleted.
-  py::class_<StreamMgr, std::unique_ptr<StreamMgr, py::nodelete>> smgr(
+  py::class_<StreamMgr, std::shared_ptr<StreamMgr>> smgr(
       m, "StreamMgr");
 
   py::enum_<StreamMgr::StreamType>(smgr, "StreamType")
@@ -22,7 +23,7 @@ void init_streammgr(py::module &m) {
   smgr.def("startStream", &StreamMgr::startStream);
   smgr.def("stopStream", &StreamMgr::stopStream);
   smgr.def_static("getInstance", []() {
-    return std::unique_ptr<StreamMgr, py::nodelete>(&StreamMgr::getInstance());
+    return StreamMgr::getInstance();
   });
   smgr.def("stopAllStreams", &StreamMgr::stopAllStreams);
 

examples/example_input.py

@@ -0,0 +1,49 @@
+#!/usr/bin/env python3
+import lasp
+# Get handle to stream manager
+mgr = lasp.StreamMgr.getInstance()
+import time
+time.sleep(1)
+
+ds = mgr.getDeviceInfo()
+# Search for a device
+for i, d in enumerate(ds):
+    print(f'{i}: ' + d.device_name)
+
+d = ds[0] # Create a configuration and enable some input channels
+config = lasp.DaqConfiguration(d)
+config.inchannel_config[0].enabled = True
+config.inchannel_config[1].enabled = True
+# Choose a different number of frames per block
+config.framesPerBlockIndex = 2
+
+# Start a stream with a configuration
+mgr.startStream(config)
+
+def reset_cb(daq):
+    print('Reset called')
+
+def cb(data):
+    # Print something on callback
+    print(data.shape)
+    return True
+
+
+# Attach the indata handler to the stream
+#i = lasp.InDataHandler(mgr, cb, reset_cb)
+
+ppm = lasp.PPMHandler(mgr)
+#del ppm
+del mgr
+
+#del i
+try:
+    while True:
+        val, clip = ppm.getCurrentValue()
+        print(val)
+        time.sleep(0.1)
+
+        #print(f'{val[0]} {val[1]}', end='')
+except KeyboardInterrupt:
+    pass
+# mgr.stopStream(lasp.StreamMgr.StreamType.input)

pyproject.toml

@@ -0,0 +1,61 @@
+[project]
+name = "lasp"
+readme = "README.md"
+requires-python = ">=3.10"
+description = "Library for Acoustic Signal Processing"
+license = { "file" = "LICENSE" }
+authors = [{ "name" = "J.A. de Jong", "email" = "j.a.dejong@ascee.nl" }]
+version = "1.6.8"
+
+keywords = ["DSP", "DAQ", "Signal processing"]
+
+classifiers = [
+    "Development Status :: 3 - Alpha",
+    "Topic :: Software Development :: Libraries :: Python Modules",
+    "License :: OSI Approved :: MIT License",
+    "Natural Language :: English",
+    "Topic :: Scientific/Engineering",
+    "Programming Language :: Python :: 3.10",
+    "Programming Language :: Python :: 3.11",
+    "Operating System :: POSIX :: Linux",
+    "Operating System :: Microsoft :: Windows",
+]
+urls = { "Documentation" = "https://lasp.ascee.nl" }
+
+dependencies = [
+    "scipy>=1.13.1",
+    "matplotlib>=3.7.2",
+    "appdirs",
+    "dataclasses_json",
+    "h5py",
+]
+
+[build-system] # How pip and other frontends should build this project
+requires = ["py-build-cmake~=0.1.8", "pybind11"]
+build-backend = "py_build_cmake.build"
+
+[tool.py-build-cmake.module] # Where to find the Python module to package
+directory = "python_src"
+
+[tool.py-build-cmake.sdist] # What to include in source distributions
+include = [
+    "CMakeLists.txt",
+    "cmake",
+    "cpp_src",
+    "python_src",
+    "img",
+    "scripts",
+    "third_party",
+]
+
+[tool.py-build-cmake.cmake] # How to build the CMake project
+build_type = "Release"
+source_path = "."
+options = { "LASP_HAS_PORTAUDIO" = "ON", "LASP_HAS_RTAUDIO" = "OFF" }
+build_args = ["-j"]
+install_components = ["python_modules"]
+
+[tool.py-build-cmake.editable]
+# This might not work properly on Windows. Comment this out when testing on
+# Windows.
+mode = "symlink"

pytest.ini

@@ -1,2 +1,2 @@
 [pytest]
-addopts = "--ignore=third_party"
+addopts = "--ignore=third_party --ignore=examples"

python_src/lasp/__init__.py

@@ -2,18 +2,20 @@
 LASP: Library for Acoustic Signal Processing
 
 """
-from .lasp_cpp import *
-import lasp.lasp_cpp
+
+
+from .lasp_version import __version__
 from .lasp_common import *
-__version__ = lasp_cpp.__version__
+from .lasp_cpp import *
 
 # from .lasp_imptube import *  # TwoMicImpedanceTube
 from .lasp_measurement import *  # Measurement, scaleBlockSens
-from .lasp_octavefilter import *
+from .lasp_octavefilter import *  # OverallFilterBank, SosOctaveFilterBank, SosThirdOctaveFilterBank
 from .lasp_slm import *  # SLM, Dummy
 from .lasp_record import *  # RecordStatus, Recording
-from .lasp_daqconfigs import *
-from .lasp_measurementset import *
+from .lasp_daqconfigs import *  # DaqConfigurations
+from .lasp_measurementset import *  # MeasurementSet
+
 # from .lasp_siggen import *  # SignalType, NoiseType, SiggenMessage, SiggenData, Siggen
 # from .lasp_weighcal import *  # WeighCal
 # from .tools import *  # SmoothingType, smoothSpectralData, SmoothingWidth

python_src/lasp/filter/biquad.py

@@ -23,11 +23,12 @@ y[n] = 1/ba[3] * (  ba[0] * x[n]   + ba[1] * x[n-1] + ba[2] * x[n-2] +
 
 """
 __all__ = ['peaking', 'biquadTF', 'notch', 'lowpass', 'highpass',
-           'highshelf', 'lowshelf']
+           'highshelf', 'lowshelf', 'LP1compensator', 'LP2compensator',
+           'HP1compensator', 'HP2compensator']
 
 from numpy import array, cos, pi, sin, sqrt
 from scipy.interpolate import interp1d
-from scipy.signal import sosfreqz
+from scipy.signal import sosfreqz, bilinear_zpk, zpk2sos
 
 
 def peaking(fs, f0, Q, gain):
@@ -157,6 +158,129 @@ def lowshelf(fs, f0, Q, gain):
     a2 = (A+1) + (A-1)*cos(w0) - 2*sqrt(A)*alpha
     return array([b0/a0, b1/a0, b2/a0, a0/a0, a1/a0, a2/a0])
 
+def LP1compensator(fs, f0o, f0n):
+    """
+    Shelving type filter that, when multiplied with a first-order low-pass 
+    filter, alters the response of that filter to a different first-order
+    low-pass filter.
+
+    Args:
+        fs: Sampling frequency [Hz]
+        f0o: Cut-off frequency of the original filter [Hz]        
+        f0n: Desired cut-off frequency [Hz]
+    """
+    
+    omg0o = 2*pi*f0o
+    omg0n = 2*pi*f0n
+    
+    z = -omg0o
+    p = -omg0n
+    k = p/z
+    
+    zd, pd, kd = bilinear_zpk(z, p, k, fs)
+
+    sos = zpk2sos(zd,pd,kd)
+    
+    return sos[0]
+
+def LP2compensator(fs, f0o, Qo, f0n, Qn):
+    """
+    Shelving type filter that, when multiplied with a second-order low-pass 
+    filter, alters the response of that filter to a different second-order
+    low-pass filter.
+
+    Args:
+        fs: Sampling frequency [Hz]
+        f0o: Cut-off frequency of the original filter [Hz]
+        Qo: Quality factor of the original filter (~inverse of bandwidth)
+        f0n: Desired cut-off frequency [Hz]
+        Qn: Desired quality factor(~inverse of bandwidth)  
+    """
+    
+    omg0o = 2*pi*f0o
+    omg0n = 2*pi*f0n
+    
+    zRe = omg0o/(2*Qo)
+    zIm = omg0o*sqrt(1-1/(4*Qo**2))
+    z1 = -zRe + zIm*1j
+    z2 = -zRe - zIm*1j
+
+    pRe = omg0n/(2*Qn)
+    pIm = omg0n*sqrt(1-1/(4*Qn**2))
+    p1 = -pRe + pIm*1j
+    p2 = -pRe - pIm*1j
+
+    z= [z1, z2]
+    p = [p1, p2]
+    k = (pRe**2 + pIm**2)/(zRe**2 + zIm**2)
+    
+    zd, pd, kd = bilinear_zpk(z, p, k, fs)
+
+    sos = zpk2sos(zd,pd,kd)
+    
+    return sos[0]
+
+def HP1compensator(fs, f0o, f0n):
+    """
+    Shelving type filter that, when multiplied with a first-order high-pass 
+    filter, alters the response of that filter to a different first-order
+    high-pass filter.
+
+    Args:
+        fs: Sampling frequency [Hz]
+        f0o: Cut-on frequency of the original filter [Hz]        
+        f0n: Desired cut-on frequency [Hz]
+    """
+    
+    omg0o = 2*pi*f0o
+    omg0n = 2*pi*f0n
+    
+    z = -omg0o
+    p = -omg0n
+    k = 1
+    
+    zd, pd, kd = bilinear_zpk(z, p, k, fs)
+
+    sos = zpk2sos(zd,pd,kd)
+    
+    return sos[0]
+
+def HP2compensator(fs, f0o, Qo, f0n, Qn):
+    """
+    Shelving type filter that, when multiplied with a second-order high-pass
+    filter, alters the response of that filter to a different second-order 
+    high-pass filter.
+
+    Args:
+        fs: Sampling frequency [Hz]
+        f0o: Cut-on frequency of the original filter [Hz]
+        Qo: Quality factor of the original filter (~inverse of bandwidth)
+        f0n: Desired cut-on frequency [Hz]
+        Qn: Desired quality factor(~inverse of bandwidth)  
+    """
+    
+    omg0o = 2*pi*f0o
+    omg0n = 2*pi*f0n
+    
+    zRe = omg0o/(2*Qo)
+    zIm = omg0o*sqrt(1-1/(4*Qo**2))
+    z1 = -zRe + zIm*1j
+    z2 = -zRe - zIm*1j
+    
+    pRe = omg0n/(2*Qn)
+    pIm = omg0n*sqrt(1-1/(4*Qn**2))
+    p1 = -pRe + pIm*1j
+    p2 = -pRe - pIm*1j
+
+    z= [z1, z2]
+    p = [p1, p2]
+    k = 1
+    
+    zd, pd, kd = bilinear_zpk(z, p, k, fs)
+
+    sos = zpk2sos(zd,pd,kd)
+    
+    return sos[0]
 
 def biquadTF(fs, freq, sos):
     """

python_src/lasp/filter/filterbank_design.py

@@ -209,6 +209,7 @@ class FilterBankDesigner:
         Returns:
             h: Linear filter transfer function [-]
         """
+        fs = self.fs
         fir = self.createFirFilter(fs, x)
 
         # Decimated sampling frequency [Hz]

python_src/lasp/filter/fir_design.py

@@ -11,7 +11,9 @@ __all__ = ['freqResponse', 'bandpass_fir_design', 'lowpass_fir_design',
            'arbitrary_fir_design']
 
 import numpy as np
-from scipy.signal import freqz, hann, firwin2
+from scipy.signal import freqz, firwin2
+from scipy.signal.windows import hann
+from ..lasp_config import empty
 
 
 def freqResponse(fs, freq, coefs_b, coefs_a=1.):
@@ -44,7 +46,7 @@ def bandpass_fir_design(L, fs, fl, fu, window=hann):
     Omg2 = 2*np.pi*fu/fs
     Omg1 = 2*np.pi*fl/fs
 
-    fir = np.empty(L, dtype=float)
+    fir = empty(L, dtype=float)
 
     # First Create ideal band-pass filter
     fir[L//2] = (Omg2-Omg1)/np.pi
@@ -64,7 +66,7 @@ def lowpass_fir_design(L, fs, fc, window=hann):
                       " than upper cut-off"
 
     Omgc = 2*np.pi*fc/fs
-    fir = np.empty(L, dtype=float)
+    fir = empty(L, dtype=float)
 
     # First Create ideal band-pass filter
     fir[L//2] = Omgc/np.pi

python_src/lasp/lasp_atomic.py

@@ -33,7 +33,7 @@ class Atomic:
 
     def checkType(self, val):
         if not (type(val) == bool or type(val) == int):
-            raise RuntimeError("Invalid type for Atomic")
+            raise ValueError("Invalid type for Atomic")
 
     def __iadd__(self, toadd):
         self.checkType(toadd)

python_src/lasp/lasp_common.py

@@ -58,9 +58,14 @@ class AvType(Enum):
 @dataclass_json
 @dataclass(eq=False)
 class Qty:
+    # Name, i.e.: Acoustic Pressure 
     name: str
+    # I.e.: Pascal
     unit_name: str
+    # I.e.: -, Pa, V
     unit_symb: str
+
+    # I.e.: ('dB SPL') <== tuple of possible level units
     level_unit: object
     # Contains a tuple of possible level names, including its reference value.
     # For now, it is only able to compute for the first one. I.e.e we are not
@@ -88,6 +93,18 @@ class Qty:
         """
         return self.cpp_enum.value
 
+    @property
+    def unit_symb_eq(self):
+        """Unit symbol to be used in equations
+
+        Returns:
+            String: V, Pa, 1,
+        """
+        if self.unit_symb != '-':
+            return self.unit_symb
+        else:
+            return '1'
+
 
 
 @unique
@@ -104,7 +121,7 @@ class SIQtys(Enum):
              unit_name='Pascal',
              unit_symb='Pa',
              level_unit=('dB SPL','dBPa'),
-             level_ref_name=('2 micropascal', '1 pascal',),
+             level_ref_name=('20 micropascal', '1 pascal',),
              level_ref_value=(P_REF, 1),
             cpp_enum = DaqChannel.Qty.AcousticPressure
             )

python_src/lasp/lasp_config.py

@@ -0,0 +1,43 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""!
+Author: J.A. de Jong - ASCEE
+
+Description: LASP configuration
+"""
+import numpy as np
+from .lasp_cpp import LASP_DOUBLE_PRECISION
+
+if LASP_DOUBLE_PRECISION:
+    LASP_NUMPY_FLOAT_TYPE = np.float64
+    LASP_NUMPY_COMPLEX_TYPE = np.complex128
+else:
+    LASP_NUMPY_FLOAT_TYPE = np.float32
+    LASP_NUMPY_COMPLEX_TYPE = np.float64
+
+
+def zeros(shape, dtype=float, order='F'):
+    if dtype == float:
+        return np.zeros(shape, dtype=LASP_NUMPY_FLOAT_TYPE, order=order)
+    elif dtype == complex:
+        return np.zeros(shape, dtype=LASP_NUMPY_COMPLEX_TYPE, order=order)
+    else:
+        raise RuntimeError(f"Unknown dtype: {dtype}")
+
+
+def ones(shape, dtype=float, order='F'):
+    if dtype == float:
+        return np.ones(shape, dtype=LASP_NUMPY_FLOAT_TYPE, order=order)
+    elif dtype == complex:
+        return np.ones(shape, dtype=LASP_NUMPY_COMPLEX_TYPE, order=order)
+    else:
+        raise RuntimeError(f"Unknown dtype: {dtype}")
+
+def empty(shape, dtype=float, order='F'):
+    if dtype == float:
+        return np.empty(shape, dtype=LASP_NUMPY_FLOAT_TYPE, order=order)
+    elif dtype == complex:
+        return np.empty(shape, dtype=LASP_NUMPY_COMPLEX_TYPE, order=order)
+    else:
+        raise RuntimeError(f"Unknown dtype: {dtype}")
+

python_src/lasp/lasp_daqconfigs.py

@@ -1,5 +1,6 @@
 # -*- coding: utf-8 -*-
-from .lasp_cpp import DaqConfiguration, LASP_VERSION_MAJOR
+from .lasp_cpp import DaqConfiguration
+from .lasp_version import LASP_VERSION_MAJOR
 
 """!
 Author: J.A. de Jong - ASCEE