First work on CPAL api. Input default seems to work. This is not yet production code!

.gitignore

@@ -3,3 +3,4 @@
 __pycache__
 python/lasprs/_lasprs*
 .venv
+.vscode/launch.json

Cargo.toml

@@ -17,24 +17,57 @@ name = "lasprs"
 crate-type = ["cdylib", "rlib"]
 
 [dependencies]
+# Error handling
 anyhow = "1.0.75"
 
+# Numerics
 # Optional future feature for ndarray: blas
 ndarray = { version = "0.15.3", features = ["rayon"] }
 num = "0.4.1"
-rayon = "1.8.0"
-numpy = { version = "0.20" }
-strum_macros = "0.25.3"
-pyo3 = { version = "0.20", features=["anyhow", "extension-module"]}
-rand = "0.8.5"
-rand_distr = "0.4.3"
 # blas-src = { version = "0.8", features = ["openblas"] }
 # openblas-src = { version = "0.10", features = ["cblas", "system"] }
 
+# Parallel iterators
+rayon = "1.8.0"
+
+# Python bindings
+pyo3 = { version = "0.20", features=["anyhow", "extension-module"], optional=true }
+numpy = { version = "0.20" }
+
+# White noise etc
+rand = "0.8.5"
+rand_distr = "0.4.3"
+
+# Cross-platform audio lib
+cpal = { version = "0.15.2", optional=true }
+
+# Nice enumerations
+strum = "0.25.0"
+strum_macros = "0.25.3"
+
+# Conditional compilation enhancements
+cfg-if = "1.0.0"
+
+# Reinterpret buffers. This is a workaround for the #[feature(specialize)] not
+# being available in stable rust.
+reinterpret = "0.2.1"
+
+# Faster channels for multithreaded communication
+crossbeam = "0.8.2"
+
+# Serialization
+serde = { version = "1.0.193", features = ["derive"] }
+toml = "0.8.8"
+
+# Initialize array for non-copy type
+array-init = "2.1.0"
+
 [features]
-default = ["f64"]
+default = ["f64", "cpal_api"]
 # Use this for debugging extension
 # default = ["f64", "extension-module", "pyo3/extension-module"]
+cpal_api = ["dep:cpal"]
+# default = ["f64", "cpal_api"]
 f64 = []
 f32 = []
-extension-module = ["pyo3/extension-module"]
+extension-module = ["dep:pyo3", "pyo3/extension-module"]

src/bin/test_input.rs

@@ -0,0 +1,14 @@
+use lasprs::daq::StreamMgr;
+use anyhow::Result;
+use std::io;
+
+fn main() -> Result<()> {
+
+    let mut smgr = StreamMgr::new();
+
+    smgr.startDefaultInputStream()?;
+
+    let _ = io::stdin().read_line(&mut (String::new()));
+
+    Ok(())
+}

src/config.rs

@@ -9,7 +9,11 @@ pub type Flt = f64;
 #[cfg(feature = "f64")]
 pub const pi: Flt = std::f64::consts::PI;
 
+/// The maximum number of input channels allowed. Compile time constant to make some structs Copy.
+pub const MAX_INPUT_CHANNELS: usize = 128;
+
 use num::complex::*;
+/// Complex number floating point
 pub type Cflt = Complex<Flt>;
 
 use numpy::ndarray::{Array1, Array2};

src/daq/api/api_cpal.rs

@@ -0,0 +1,109 @@
+use super::Stream;
+use crate::daq::deviceinfo::DeviceInfo;
+use crate::daq::streammsg::*;
+use anyhow::{bail, Result};
+use cpal::traits::{DeviceTrait, HostTrait, StreamTrait};
+use cpal::{Device, Host, Sample, SampleFormat};
+use crossbeam::channel::Sender;
+use std::sync::Arc;
+
+/// Cpal api
+pub struct CpalApi {
+    host: cpal::Host,
+}
+impl Stream for cpal::Stream {}
+
+impl CpalApi {
+    pub fn new() -> CpalApi {
+        CpalApi {
+            host: cpal::default_host(),
+        }
+    }
+    pub fn getDeviceInfo(&self) -> Result<Vec<DeviceInfo>> {
+        let devs = vec![];
+        for dev in self.host.devices()? {
+
+        }
+        Ok(devs)
+    }
+
+    fn build_input_stream(
+        sf: cpal::SampleFormat,
+        config: cpal::StreamConfig,
+        device: &cpal::Device,
+        sender: Sender<RawStreamData>,
+    ) -> Result<cpal::Stream> {
+
+        let sender_errcallback = sender.clone();
+
+        let errfn = move |err: cpal::StreamError| match err {
+            cpal::StreamError::DeviceNotAvailable => sender_errcallback
+                .send(RawStreamData::StreamError(StreamError::DeviceNotAvailable))
+                .unwrap(),
+            cpal::StreamError::BackendSpecific { err: _ } => sender_errcallback
+                .send(RawStreamData::StreamError(StreamError::DriverError))
+                .unwrap(),
+        };
+
+        macro_rules! build_stream{
+            ($($cpaltype:pat, $rtype:ty);*) => {
+                match sf {
+                    $(
+                        $cpaltype => device.build_input_stream(
+                            &config,
+                            move |data, _: &_| InStreamCallback::<$rtype>(data, &sender),
+                            errfn,
+                            None)?
+                        ),*,
+                        _ => bail!("Unsupported sample format '{}'", sf)
+                }
+            }
+        }
+        let stream: cpal::Stream = build_stream!(
+        SampleFormat::I8, i8;
+        SampleFormat::I16, i16;
+        SampleFormat::I32, i32;
+        SampleFormat::F32, f32
+        );
+        Ok(stream)
+    }
+    /// Start a default input stream
+    ///
+    ///
+    pub fn startDefaultInputStream(
+        &mut self,
+        sender: Sender<RawStreamData>,
+    ) -> Result<Box<dyn Stream>> {
+        if let Some(device) = self.host.default_input_device() {
+            if let Ok(config) = device.default_input_config() {
+                let final_config = cpal::StreamConfig {
+                    channels: config.channels(),
+                    sample_rate: config.sample_rate(),
+                    buffer_size: cpal::BufferSize::Fixed(4096),
+                };
+
+                let sf = config.sample_format();
+                let stream = CpalApi::build_input_stream(sf, final_config, &device, sender)?;
+                stream.play()?;
+                println!("Stream started with sample format {:?}", sf);
+
+                Ok(Box::new(stream))
+            } else {
+                bail!("Could not obtain default input configuration")
+            }
+        } else {
+            bail!("Could not open default input device")
+        }
+    }
+    // pub fn getDeviceInfo(&self) -> Result<Vec<DeviceInfo>> {
+
+    // }
+}
+
+fn InStreamCallback<T>(input: &[T], sender: &Sender<RawStreamData>)
+where
+    T: Copy + num::ToPrimitive + 'static,
+{
+    let msg = RawStreamData::from(input);
+    sender.send(msg).unwrap()
+}

src/daq/api/mod.rs

@@ -0,0 +1,24 @@
+/// Daq apis that are optionally compiled in. Examples:
+///
+/// - CPAL (Cross-Platform Audio Library)
+/// - ...
+use strum::EnumMessage;
+use strum_macros;
+use serde::{Serialize, Deserialize};
+
+cfg_if::cfg_if! {
+    if #[cfg(feature="cpal_api")] {
+        pub mod api_cpal;
+    } else { }
+}
+
+/// A currently running stream
+pub trait Stream { }
+
+#[derive(strum_macros::EnumMessage, Debug, Clone, PartialEq, Serialize, Deserialize)]
+#[allow(dead_code)]
+pub enum StreamApiDescr {
+    /// CPAL api
+    #[strum(message = "Cpal", detailed_message = "Cross-Platform Audio Library")]
+    Cpal = 0,
+}

src/daq/deviceinfo.rs

@@ -0,0 +1,67 @@
+//! Data acquisition model. Provides abstract layers around DAQ devices.
+#![allow(non_snake_case)]
+
+use super::datatype::DataType;
+use super::qty::Qty;
+use super::api::StreamApiDescr;
+
+/// Device info structure. Gives all information regarding a device, i.e. the number of input and
+/// output channels, its name and available sample rates and types.
+#[derive(Clone, Debug)]
+#[allow(dead_code)]
+pub struct DeviceInfo {
+
+    /// The api in use for this device
+    pub api: StreamApiDescr,
+
+    /// Name for the device.
+    pub name: String,
+
+    /// Available data types for the sample
+    pub avDataTypes: Vec<DataType>,
+    /// Preferred data type for device
+    pub prefDataType: DataType,
+
+    /// Available frames per block
+    pub avFramesPerBlock: Vec<u16>,
+    /// Preferred frames per block for device
+    pub prefFramesPerBlock: u16,
+
+    /// Available sample rates
+    pub avSampleRates: Vec<u16>,
+    /// Preferred sample rate for device
+    pub prefSampleRate: u16,
+
+    /// Number of input channels available for this device
+    pub iChannelCount: u8,
+    /// Number of output channels available for this device
+    pub oChannelCount: u8,
+
+    /// Whether the device is capable to provide IEPE constant current power supply.
+    pub hasInputIEPE: bool,
+
+    /// Whether the device is capable of enabling a hardware AC-coupling
+    pub hasInputACCouplingSwitch: bool,
+
+    ///Whether the device is able to trigger on input
+    pub hasInputTrigger: bool,
+
+    /// Whether the device has an internal monitor of the output signal. If
+    /// true, the device is able to monitor output signals internally and able to
+    /// present output signals as virtual input signals. This only works together
+    /// Daq's that are able to run in full duplex mode.
+    pub hasInternalOutputMonitor: bool,
+
+    /// This flag is used to be able to indicate that the device cannot run
+    /// input and output streams independently, without opening the device in
+    /// duplex mode. This is for example true for the UlDaq: only one handle to
+    /// the device can be given at the same time.
+    pub duplexModeForced: bool,
+
+    /// The physical quantity of the output signal. For 'normal' audio
+    /// devices, this is typically a 'number' between +/- full scale. For some
+    /// devices however, the output quantity corresponds to a physical signal,
+    /// such a Volts.
+    pub physicalIOQty: Qty,
+}
+

src/daq/mod.rs

@@ -0,0 +1,227 @@
+//! Data acquisition model. Provides abstract layers around DAQ devices.
+
+mod api;
+mod daqconfig;
+mod datatype;
+mod deviceinfo;
+mod qty;
+mod streammsg;
+
+pub use datatype::*;
+pub use deviceinfo::*;
+pub use qty::*;
+pub use streammsg::*;
+
+#[cfg(feature = "cpal_api")]
+use api::api_cpal::CpalApi;
+
+use crate::config::*;
+use anyhow::{bail, Error, Result};
+use api::Stream;
+use core::time;
+use crossbeam::{
+    channel::{unbounded, Receiver, Sender},
+    thread,
+};
+use deviceinfo::DeviceInfo;
+use std::sync::{atomic::AtomicBool, Arc, Mutex};
+use std::thread::{JoinHandle, Thread};
+use streammsg::*;
+
+/// Keep track of whether the stream has been created. To ensure singleton behaviour.
+static smgr_created: AtomicBool = AtomicBool::new(false);
+
+struct InputStream {
+    streamtype: StreamType,
+    stream: Box<dyn Stream>,
+    threadhandle: JoinHandle<InQueues>,
+    comm: Sender<StreamCommand>,
+}
+
+/// Configure and manage input / output streams.
+///
+pub struct StreamMgr {
+    // Input stream can be both input and duplex
+    input_stream: Option<InputStream>,
+
+    // Output only stream
+    output_stream: Option<Box<dyn Stream>>,
+
+    // Signal generator
+    siggen: Option<crate::siggen::Siggen>,
+
+    #[cfg(feature = "cpal_api")]
+    cpal_api: CpalApi,
+
+    /// The storage of queues. When no streams are running, they
+    /// are here. When stream is running, they will become available
+    /// in the JoinHandle of the thread.
+    instreamqueues: Option<InQueues>,
+}
+
+impl StreamMgr {
+    /// Create new stream manager. A stream manager is supposed to be a singleton.
+    ///
+    /// # Panics
+    ///
+    /// When a StreamMgr object is already alive.
+    pub fn new() -> StreamMgr {
+        if smgr_created.load(std::sync::atomic::Ordering::Relaxed) {
+            panic!("BUG: Only one stream manager is supposed to be a singleton");
+        }
+        smgr_created.store(true, std::sync::atomic::Ordering::Relaxed);
+
+        StreamMgr {
+            input_stream: None,
+            output_stream: None,
+            siggen: None,
+
+            #[cfg(feature = "cpal_api")]
+            cpal_api: CpalApi::new(),
+
+            instreamqueues: Some(vec![]),
+        }
+    }
+    /// Obtain a list of devices that are available for each available API
+    fn getDeviceInfo(&mut self) -> Vec<DeviceInfo> {
+        let mut devinfo = vec![];
+        #[cfg(feature="cpal_api")]
+        devinfo.extend(self.cpal_api.getDeviceInfo());
+        devinfo
+    }
+
+    /// Start a default input stream, using default settings on everything. This is only possible
+    /// when
+    pub fn startDefaultInputStream(&mut self) -> Result<()> {
+        #![allow(unreachable_code)]
+        if !self.input_stream.is_none() {
+            bail!("Input stream is already running. Please first stop existing input stream.")
+        }
+
+        let (tx, rx): (Sender<RawStreamData>, Receiver<RawStreamData>) = unbounded();
+
+        cfg_if::cfg_if! {
+            if #[cfg(feature="cpal_api")] {
+                let stream = self.cpal_api.startDefaultInputStream(tx)?;
+            }
+            else {
+                bail!("Unable to start default input stream: no CPAL api available")
+            }
+        }
+
+        // Unwrap here, as the queues should be free to grab
+        let mut iqueues = self.instreamqueues.take().unwrap();
+
+        let (commtx, commrx) = unbounded();
+
+        // let metadata = StreamMetaData::new(
+        //     nchannels:
+        // ).unwrap();
+        let threadhandle = std::thread::spawn(move || {
+            let mut ctr: usize = 0;
+            'infy: loop {
+                if let Ok(comm_msg) = commrx.try_recv() {
+                    match comm_msg {
+                        // New queue added
+                        StreamCommand::AddInQueue(queue) => {
+                            iqueues.push(queue);
+                            // queue.send(streammsg::StreamMetaData(md))
+                        }
+
+                        // Remove queue from list
+                        StreamCommand::RemoveInQueue(queue) => {
+                            iqueues.retain(|q| !Arc::ptr_eq(q, &queue))
+                        }
+
+                        // Stop this thread. Returns the queue
+                        StreamCommand::StopThread => {
+                            for q in iqueues.iter() {
+                                q.send(InStreamMsg::StreamStopped).unwrap();
+                            }
+                            break 'infy;
+                        }
+                    }
+                }
+                if let Ok(msg) = rx.recv_timeout(time::Duration::from_millis(10)) {
+                    // println!("Obtained raw stream data!");
+                    let msg = Arc::new(msg);
+                    for q in iqueues.iter() {
+                        q.send(InStreamMsg::RawStreamData(ctr, msg.clone()))
+                            .unwrap();
+                    }
+                }
+                ctr += 1;
+            }
+            iqueues
+        });
+
+        cfg_if::cfg_if! {
+            if #[cfg(feature="cpal_api")] {
+                self.input_stream = Some(InputStream {
+                    streamtype: StreamType::Input,
+                    stream,
+                    threadhandle,
+                    comm: commtx,
+                });
+            } else {}
+        }
+
+        Ok(())
+    }
+
+    /// Stop existing input stream.
+    pub fn stopInputStream(&mut self) -> Result<()> {
+        if let Some(InputStream {
+            streamtype: _, // Ignored here
+            stream: _,
+            threadhandle,
+            comm,
+        }) = self.input_stream.take()
+        {
+            // println!("Stopping existing stream..");
+            // Send thread to stop
+            comm.send(StreamCommand::StopThread).unwrap();
+
+            // Store stream queues back into StreamMgr
+            self.instreamqueues = Some(threadhandle.join().expect("Stream thread panicked!"));
+        } else {
+            bail!("Stream is not running.")
+        }
+        Ok(())
+    }
+    /// Stop existing running stream.
+    ///
+    /// Args
+    ///
+    /// * st: The stream type.
+    pub fn stopStream(&mut self, st: StreamType) -> Result<()> {
+        match st {
+            StreamType::Input | StreamType::Duplex => self.stopInputStream(),
+            _ => bail!("Not implemented output stream"),
+        }
+    }
+
+} // impl StreamMgr
+impl Drop for StreamMgr {
+    fn drop(&mut self) {
+        // Kill input stream if there is one
+        if self.input_stream.is_some() {
+            self.stopStream(StreamType::Input).unwrap();
+        }
+        if self.output_stream.is_some() {
+            self.stopStream(StreamType::Output).unwrap();
+        }
+
+        // Decref the singleton
+        smgr_created.store(false, std::sync::atomic::Ordering::Relaxed);
+    }
+}
+
+/// Daq devices
+trait Daq {}
+
+#[cfg(test)]
+mod tests {
+
+    // #[test]
+}

src/daq/streammsg.rs

@@ -0,0 +1,183 @@
+//! Provides stream messages that come from a running stream
+use crate::config::*;
+use crate::daq::DataType;
+use crate::daq::Qty;
+use anyhow::{bail, Result};
+use crossbeam::channel::Sender;
+use reinterpret::reinterpret_slice;
+use std::any::TypeId;
+use std::sync::Arc;
+use std::u128::MAX;
+
+use super::daqconfig::DaqChannel;
+
+/// Raw stream data coming from a stream.
+#[derive(Clone)]
+pub enum RawStreamData {
+    /// 8-bits integer
+    Datai8(Arc<Vec<i8>>),
+    /// 16-bits integer
+    Datai16(Arc<Vec<i16>>),
+    /// 32-bits integer
+    Datai32(Arc<Vec<i32>>),
+    /// 32-bits float
+    Dataf32(Arc<Vec<f32>>),
+    /// 64-bits float
+    Dataf64(Arc<Vec<f64>>),
+
+    /// Unknown data type. We cannot do anything with it, we could instead also create an error, although this is easier to pass downstream.
+    UnknownDataType,
+
+    /// A stream error occured
+    StreamError(StreamError),
+}
+
+// Create InStreamData object from
+impl<T> From<&[T]> for RawStreamData
+where
+    T: num::ToPrimitive + Clone + 'static,
+{
+    fn from(input: &[T]) -> RawStreamData {
+        // Apparently, this code does not work with a match. I have searched around and have not found the
+        // reason for this. So this is a bit of stupid boilerplate.
+        let i8type: TypeId = TypeId::of::<i8>();
+        let i16type: TypeId = TypeId::of::<i16>();
+        let i32type: TypeId = TypeId::of::<i32>();
+        let f32type: TypeId = TypeId::of::<f32>();
+        let f64type: TypeId = TypeId::of::<f64>();
+        let thetype: TypeId = TypeId::of::<T>();
+        if i8type == thetype {
+            let v: Vec<i8> = unsafe { reinterpret_slice(input).to_vec() };
+            RawStreamData::Datai8(Arc::new(v))
+        } else if i16type == thetype {
+            let v: Vec<i16> = unsafe { reinterpret_slice(input).to_vec() };
+            RawStreamData::Datai16(Arc::new(v))
+        } else if i16type == thetype {
+            let v: Vec<i16> = unsafe { reinterpret_slice(input).to_vec() };
+            RawStreamData::Datai16(Arc::new(v))
+        } else if i32type == thetype {
+            let v: Vec<i32> = unsafe { reinterpret_slice(input).to_vec() };
+            RawStreamData::Datai32(Arc::new(v))
+        } else if f32type == thetype {
+            let v: Vec<f32> = unsafe { reinterpret_slice(input).to_vec() };
+            RawStreamData::Dataf32(Arc::new(v))
+        } else if f64type == thetype {
+            let v: Vec<f64> = unsafe { reinterpret_slice(input).to_vec() };
+            RawStreamData::Dataf64(Arc::new(v))
+        } else {
+            panic!("Not implemented sample type!")
+        }
+    }
+}
+
+/// Stream metadata. All information required for
+pub struct StreamMetaData {
+    /// The number of channels. Should be <= MAX_INPUT_CHANNELS
+    pub nchannels: usize,
+
+    /// Information for each channel in the stream
+    pub channelInfo: [DaqChannel; MAX_INPUT_CHANNELS],
+
+    /// The data type of the device [Number / voltage]
+    pub rawDatatype: DataType,
+
+    /// Sample rate in [Hz]
+    pub samplerate: Flt,
+}
+impl StreamMetaData {
+    /// Create new metadata object. Throws an error if the number of channels for the sensitivity and quantities does
+    /// not match.
+    ///
+    /// # Args
+    ///
+    /// * nchannels: The number of channels that are send
+    /// * sens: Sensitivity values for each channel
+    /// * rawdtype: The data type of the raw stream data. For sound cards this is Number, for DAQ's, this might be a voltage.
+    /// * qtys_: The physical quantities for each channel
+    /// * sr: The sample rate in \[Hz\]
+    ///
+    /// # Panics
+    ///
+    /// If the number of channels > MAX_INPUT_CHANNELS
+    pub fn new(channel_data: &[DaqChannel], rawdtype: DataType, sr: Flt) -> Result<StreamMetaData> {
+        if channel_data.len() > MAX_INPUT_CHANNELS {
+            bail!("Too many channels provided.")
+        }
+        let nchannels = channel_data.len();
+        let channelInfo: [DaqChannel; MAX_INPUT_CHANNELS] =
+            array_init::array_init(|_i: usize| DaqChannel::default());
+
+        Ok(StreamMetaData {
+            nchannels,
+            channelInfo,
+            rawDatatype: rawdtype,
+            samplerate: sr,
+        })
+    }
+}
+/// Input stream messages, to be send to handlers.
+#[derive(Clone)]
+pub enum InStreamMsg {
+    /// Raw stream data that is coming from a device. This is interleaved data. The number of channels is correct and
+    /// specified in the stream metadata.
+    RawStreamData(usize, Arc<RawStreamData>),
+
+    /// An error has occured in the stream
+    StreamError(StreamError),
+
+    /// Stream data converted to floating point with sample width as
+    /// compiled in.
+    ConvertedStreamData(usize, Arc<crate::config::Dmat>),
+
+    /// new Stream metadata enters the scene. Probably a new stream started.
+    StreamStarted(Arc<StreamMetaData>),
+
+    /// An existing stream stopped.
+    StreamStopped,
+}
+
+/// Store a queue in a shared pointer, to share sending
+/// and receiving part of the queue.
+pub type SharedInQueue = Arc<Sender<InStreamMsg>>;
+/// Vector of queues for stream messages
+pub type InQueues = Vec<SharedInQueue>;
+
+/// Commands that can be sent to a running stream
+pub enum StreamCommand {
+    /// Add a new queue to a running stream
+    AddInQueue(SharedInQueue),
+    /// Remove a queue to a running stream
+    RemoveInQueue(SharedInQueue),
+
+    /// Stop the thread, do not listen for data anymore.
+    StopThread,
+}
+
+/// Stream types that can be started
+/// 
+pub enum StreamType {
+    /// Input-only stream
+    Input,
+    /// Output-only stream
+    Output,
+    /// Input and output at the same time
+    Duplex,
+}
+
+/// Errors that happen in a stream
+#[derive(strum_macros::EnumMessage, Debug, Clone)]
+pub enum StreamError {
+    /// Input overrun
+    #[strum(message = "InputXRunError", detailed_message = "Input buffer overrun")]
+    InputXRunError,
+    /// Output underrun
+    #[strum(message = "OutputXRunError", detailed_message = "Output buffer overrun")]
+    OutputXRunError,
+    /// Driver specific error
+    #[strum(message = "DriverError", detailed_message = "Driver error")]
+    DriverError,
+
+    /// Device
+    #[strum(detailed_message = "Device not available")]
+    DeviceNotAvailable
+}

src/filter.rs

@@ -5,12 +5,17 @@
 #![allow(non_snake_case)]
 use super::config::*;
 use anyhow::{bail, Result};
+use cfg_if::cfg_if;
 use numpy::ndarray::{ArrayD, ArrayViewD, ArrayViewMutD};
 use numpy::{IntoPyArray, PyArray1, PyArrayDyn, PyArrayLike1, PyReadonlyArrayDyn};
+use rayon::prelude::*;
+
+cfg_if! {
+if #[cfg(feature = "extension-module")] {
 use pyo3::exceptions::PyValueError;
 use pyo3::prelude::*;
 use pyo3::{pymodule, types::PyModule, PyResult};
-use rayon::prelude::*;
+} else {} }
 
 pub trait Filter: Send {
     //! The filter trait is implemented by Biquad, SeriesBiquad, and BiquadBank
@@ -170,7 +175,7 @@ impl Filter for Biquad {
 ///
 /// # Examples
 ///
-/// See [tests]
+/// See (tests)
 /// ```
 #[derive(Clone, Debug)]
 #[cfg_attr(feature = "extension-module", pyclass)]
@@ -359,7 +364,6 @@ impl BiquadBank {
         }
         self.set_gains_dB(gains_dB.as_slice()?);
         Ok(())
-
     }
     #[pyo3(name = "len")]
     /// See: [BiquadBank::len()]

src/lib.rs

@@ -5,16 +5,18 @@
 
 #![warn(missing_docs)]
 #![allow(non_snake_case)]
+
 #![allow(non_upper_case_globals)]
 #![allow(unused_imports)]
 
 mod config;
 pub mod filter;
+
 // pub mod window;
 // pub mod ps;
+pub mod daq;
 pub mod siggen;
 
- extern crate pyo3;
 #[cfg(feature = "extension-module")]
 use pyo3::prelude::*;
 

src/siggen.rs

@@ -5,6 +5,7 @@
 //! ## Create some white noise and print it.
 //!
 //! ```
+//! use lasprs::siggen::Siggen;
 //! let mut wn = Siggen::newWhiteNoise();
 //! wn.setGain(0.1);
 //! wn.setMute(false);
@@ -15,12 +16,14 @@
 //! ```
 use super::config::*;
 use super::filter::Filter;
+#[cfg(feature="extension-module")]
 use pyo3::prelude::*;
 use rand::prelude::*;
 use rand::rngs::ThreadRng;
 use rand_distr::StandardNormal;
 
-trait Source: Send {
+/// Source for the signal generator. Implementations are sine waves, sweeps, noise.
+pub trait Source: Send {
     /// Generate the 'pure' source signal. Output is placed inside the `sig` argument.
     fn genSignal_unscaled(&mut self, sig: &mut [Flt]);
     /// Reset the source state, i.e. set phase to 0, etc
@@ -104,10 +107,14 @@ impl Source for Sine {
     }
 }
 
-/// Sweep signal
 
 #[derive(Clone)]
-/// Signal generator. Able to create acoustic output signals
+/// Signal generator. Able to create acoustic output signals. See above example on how to use.
+/// Typical signal that can be created are:
+///
+/// * (Siggen::newWhiteNoise)
+/// * (Siggen::newSine)
+///
 pub struct Siggen {
     // The source dynamic signal. Noise, a sine wave, sweep, etc
     source: Box<dyn Source>,
@@ -138,7 +145,7 @@ impl Siggen {
     }
     /// Create a sine wave signal generator
     ///
-    /// * freq: Frequency of the sine wave in [Hz]
+    /// * freq: Frequency of the sine wave in \[Hz\]
     pub fn newSineWave(freq: Flt) -> Siggen {
         Siggen::new(Box::new(Sine::new(freq)))
     }
@@ -191,7 +198,7 @@ impl Siggen {
     ///
     /// Args
     ///
-    /// * fs: (New) Sampling frequency [Hz]
+    /// * fs: (New) Sampling frequency \[Hz\]
     ///
     pub fn reset(&mut self, fs: Flt) {
         self.source.reset(fs);
@@ -199,6 +206,11 @@ impl Siggen {
             f.reset();
         }
     }
+
+    /// Set mut on signal generator. If true, only DC signal offset is outputed from (Sigen::genSignal).
+    pub fn setMute(&mut self, mute: bool) {
+        self.muted = mute
+    }
 }
 
 #[cfg(test)]
@@ -207,8 +219,19 @@ mod test {
 
     #[test]
     fn test_whitenoise() {
-        let mut t = &[0.; 10];
-        Siggen::newWiteNoise().genSignal(&mut t);
+        // This code is just to check syntax. We should really be listening to these outputs.
+        let mut t = [0.; 10];
+        Siggen::newWhiteNoise().genSignal(&mut t);
         println!("{:?}", &t);
     }
+
+    #[test]
+    fn test_sine() {
+        // This code is just to check syntax. We should really be listening to these outputs.
+        let mut s = [0.; 9];
+        let mut siggen = Siggen::newSineWave(1.);
+        siggen.reset(1.);
+        siggen.genSignal(&mut s);
+        println!("{:?}", &s);
+    }
 }