Bump 0.6.6

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "lasprs"
-version = "0.6.5"
+version = "0.6.6"
 edition = "2021"
 authors = ["J.A. de Jong <j.a.dejong@ascee.nl>"]
 description = "Library for Acoustic Signal Processing (Rust edition, with optional Python bindings via pyo3)"

src/bin/lasp_record.rs

@@ -60,25 +60,27 @@ fn main() -> Result<()> {
 
     let mut r = Recording::new(settings, &mut smgr)?;
 
-    println!("Starting to record... Enter 'c' to cancel.");
+    // println!("Starting to record... Enter 'c' to cancel.");
     'infy: loop {
         match r.status() {
-            RecordStatus::Idle => println!("\nIdle"),
-            RecordStatus::Error(e) => {
-                println!("\nRecord error: {}", e);
-                break 'infy;
-            }
-            RecordStatus::Waiting => {
+            RecordStatus::Idle {} => println!("\nIdle"),
+            RecordStatus::Waiting {} => {
                 println!("Waiting in start delay...");
             }
-            RecordStatus::Finished => {
+            RecordStatus::Finished { clipped, error } => {
                 println!("\nRecording finished.");
+                if clipped {
+                    println!("Recording clipped!");
+                }
+                if let Some(msg) = error {
+                    println!("Recording failed with an error: {msg}");
+                }
                 break 'infy;
             }
-            RecordStatus::Recording(duration) => {
-                println!("Recording...   {} ms", duration.as_millis());
+            RecordStatus::Recording { recorded, .. } => {
+                println!("Recording...   {:.0} ms", recorded * 1000.);
             }
-            RecordStatus::NoUpdate => {}
+            RecordStatus::NoUpdate {} => {}
         };
 
         match stdin_channel.try_recv() {

src/daq/mod.rs

@@ -75,6 +75,9 @@ pub fn add_py_classses(m: &Bound<'_, PyModule>) -> PyResult<()> {
     m.add_class::<StreamError>()?;
     m.add_class::<DaqChannel>()?;
     m.add_class::<DaqConfig>()?;
+    m.add_class::<RecordSettings>()?;
+    m.add_class::<RecordStatus>()?;
+    m.add_class::<Recording>()?;
 
     Ok(())
 }

src/daq/record.rs

@@ -1,6 +1,7 @@
 use super::*;
 use crate::config::Flt;
-use anyhow::{bail, Error, Result};
+use crate::rt::SimpleClipDetector;
+use anyhow::{anyhow, bail, Error, Result};
 use clap::builder::OsStr;
 use crossbeam::atomic::AtomicCell;
 use hdf5::types::{VarLenArray, VarLenUnicode};
@@ -8,7 +9,7 @@ use hdf5::{dataset, datatype, Dataset, File, H5Type};
 use parking_lot::Mutex;
 use std::path::{Path, PathBuf};
 use std::str::FromStr;
-use std::sync::atomic::{AtomicBool, Ordering::SeqCst};
+use std::sync::atomic::{AtomicBool, Ordering::Relaxed};
 use std::sync::Arc;
 use std::thread::{spawn, JoinHandle};
 use std::time::Duration;
@@ -17,30 +18,44 @@ use streammgr::*;
 use streammsg::InStreamMsg;
 use strum::EnumMessage;
 
-#[derive(Clone, Debug)]
 /// Status of a recording
+#[cfg_attr(feature = "python-bindings", pyclass(get_all, eq))]
+#[derive(Clone, Debug, PartialEq)]
 pub enum RecordStatus {
     /// Nothing to update
-    NoUpdate,
+    NoUpdate {},
 
     /// Not yet started, waiting for first msg
-    Idle,
+    Idle {},
 
     /// Waiting for start delay to be processed.
-    Waiting,
+    Waiting {},
 
     /// Recording in progress
-    Recording(Duration),
+    Recording {
+        /// Whether a clip has already happened during recording
+        clipped: bool,
+        /// The amount of time that is currently recorded
+        recorded: Flt,
+        /// The percentage done [0 to 100%]. Stays at 0% for infinite duration
+        /// recordings
+        pct_done: Flt,
+    },
 
     /// Recording finished
-    Finished,
-
-    /// An error occurred, in any case when an error occurs, it is tried to remove the file.
-    Error(String),
+    Finished {
+        /// Whether there occured a signal clip during the recording. Can only
+        /// be detected when the flag 'record_clip`
+        clipped: bool,
+        /// Possibly, the recording finished, but an error happened, due to
+        /// which the data is invalid.
+        error: Option<String>,
+    },
 }
 
 /// Settings used to start a recording.
 #[derive(Clone)]
+#[cfg_attr(feature = "python-bindings", pyclass(get_all))]
 pub struct RecordSettings {
     /// File name to record to.
     pub filename: PathBuf,
@@ -74,6 +89,29 @@ impl RecordSettings {
     }
 }
 
+#[cfg(feature = "python-bindings")]
+#[cfg_attr(feature = "python-bindings", pymethods)]
+impl RecordSettings {
+    #[new]
+    #[pyo3(signature=(filename, duration=None, startDelay=None))]
+    fn new_py(filename: String, duration: Option<Flt>, startDelay: Option<Flt>) -> PyResult<Self> {
+        let startDelay = if let Some(delay) = startDelay {
+            let delay = Duration::try_from_secs_f64(delay)
+                .map_err(|e| anyhow! {"Invalid start delay specified: {e}"})?;
+            Some(delay)
+        } else {
+            None
+        };
+        let duration = if let Some(duration) = duration {
+            Duration::try_from_secs_f64(duration)
+                .map_err(|e| anyhow! {"Invalid duration specified: {e}"})?
+        } else {
+            Duration::ZERO
+        };
+        Ok(RecordSettings::new(filename, duration, startDelay))
+    }
+}
+
 /// This struct lets a recording run on a stream, waits till the first data arrives and records for a given period of time. Usage:
 ///
 /// ```
@@ -94,14 +132,17 @@ impl RecordSettings {
 /// Ok(())
 /// }
 /// ```
+#[cfg_attr(feature = "python-bindings", pyclass)]
 pub struct Recording {
+    // Recording settings
     settings: RecordSettings,
-    handle: Option<JoinHandle<Result<()>>>,
 
     // Stop the recording. This stops the thread
     stopThread: Arc<AtomicBool>,
+
     // Obtain status from thread.
     status_from_thread: Arc<AtomicCell<RecordStatus>>,
+
     // Stores latest status from thread, if no update comes from status_from_thread
     last_status: RecordStatus,
 }
@@ -166,7 +207,8 @@ impl Recording {
             // or interleaved. This happens to be the default for ndarray as
             // well.
             RawStreamData::Datai8(dat) => {
-                let arr = ndarray15p6::ArrayView2::<i8>::from_shape((framesPerBlock, nchannels), dat)?;
+                let arr =
+                    ndarray15p6::ArrayView2::<i8>::from_shape((framesPerBlock, nchannels), dat)?;
                 ds.write_slice(arr, (ctr, .., ..))?;
             }
             RawStreamData::Datai16(dat) => {
@@ -210,6 +252,9 @@ impl Recording {
             }
         };
 
+        // Detector for signal clipping
+        let clipdetector = SimpleClipDetector::new(mgr);
+
         let stopThread = Arc::new(AtomicBool::new(false));
         let stopThread_clone = stopThread.clone();
 
@@ -222,171 +267,200 @@ impl Recording {
         }
         let settings_clone = settings.clone();
 
-        let status = Arc::new(AtomicCell::new(RecordStatus::Idle));
+        let status = Arc::new(AtomicCell::new(RecordStatus::Idle {}));
         let status_clone = status.clone();
 
         let (tx, rx) = crossbeam::channel::unbounded();
         mgr.addInQueue(tx.clone());
 
         // The thread doing the actual work
-        let handle = spawn(move || {
-            let file = File::create(settings.filename)?;
+        rayon::spawn(move || {
+            let recording_closure = || {
+                let file = File::create(settings.filename)?;
 
-            let firstmsg = match rx.recv() {
-                Ok(msg) => msg,
-                Err(_) => bail!("Queue handle error"),
-            };
+                let firstmsg = match rx.recv() {
+                    Ok(msg) => msg,
+                    Err(_) => bail!("Queue handle error"),
+                };
 
-            let meta = match firstmsg {
-                InStreamMsg::StreamStarted(meta) => meta,
-                _ => bail!("Recording failed. Missed stream metadata message."),
-            };
+                let meta = match firstmsg {
+                    InStreamMsg::StreamStarted(meta) => meta,
+                    _ => bail!("Recording failed. Missed stream metadata message."),
+                };
 
-            // Samplerate, block size, number of channels
-            Recording::write_hdf5_attr_scalar(&file, "samplerate", meta.samplerate)?;
-            Recording::write_hdf5_attr_scalar(&file, "nchannels", meta.nchannels())?;
-            Recording::write_hdf5_attr_scalar(&file, "blocksize", meta.framesPerBlock)?;
+                // Samplerate, block size, number of channels
+                Recording::write_hdf5_attr_scalar(&file, "samplerate", meta.samplerate)?;
+                Recording::write_hdf5_attr_scalar(&file, "nchannels", meta.nchannels())?;
+                Recording::write_hdf5_attr_scalar(&file, "blocksize", meta.framesPerBlock)?;
 
-            // Store sensitivity
-            let sens: Vec<Flt> = meta.channelInfo.iter().map(|ch| ch.sensitivity).collect();
-            Recording::write_hdf5_attr_list(&file, "sensitivity", &sens)?;
+                // Store sensitivity
+                let sens: Vec<Flt> = meta.channelInfo.iter().map(|ch| ch.sensitivity).collect();
+                Recording::write_hdf5_attr_list(&file, "sensitivity", &sens)?;
 
-            // Timestamp
-            use chrono::DateTime;
-            let now_utc = chrono::Utc::now();
-            let timestamp = now_utc.timestamp();
-            Recording::write_hdf5_attr_scalar(&file, "time", timestamp)?;
+                // Timestamp
+                use chrono::DateTime;
+                let now_utc = chrono::Utc::now();
+                let timestamp = now_utc.timestamp();
+                Recording::write_hdf5_attr_scalar(&file, "time", timestamp)?;
 
-            // Create UUID for measurement
-            use hdf5::types::VarLenUnicode;
-            let uuid = uuid::Uuid::new_v4();
-            let uuid_unicode: VarLenUnicode = VarLenUnicode::from_str(&uuid.to_string()).unwrap();
-            Recording::write_hdf5_attr_scalar(&file, "UUID", uuid_unicode)?;
+                // Create UUID for measurement
+                use hdf5::types::VarLenUnicode;
+                let uuid = uuid::Uuid::new_v4();
+                let uuid_unicode: VarLenUnicode =
+                    VarLenUnicode::from_str(&uuid.to_string()).unwrap();
+                Recording::write_hdf5_attr_scalar(&file, "UUID", uuid_unicode)?;
 
-            // Channel names
-            let chnames: Vec<VarLenUnicode> = meta
-                .channelInfo
-                .iter()
-                .map(|ch| VarLenUnicode::from_str(&ch.name).unwrap())
-                .collect();
-            let chname_attr = file
-                .new_attr::<VarLenUnicode>()
-                .shape([chnames.len()])
-                .create("channelNames")?;
-            chname_attr.write(&chnames)?;
+                // Channel names
+                let chnames: Vec<VarLenUnicode> = meta
+                    .channelInfo
+                    .iter()
+                    .map(|ch| VarLenUnicode::from_str(&ch.name).unwrap())
+                    .collect();
+                let chname_attr = file
+                    .new_attr::<VarLenUnicode>()
+                    .shape([chnames.len()])
+                    .create("channelNames")?;
+                chname_attr.write(&chnames)?;
 
-            // Create the dataset
-            let ds = Recording::create_dataset(&file, &meta)?;
+                // Create the dataset
+                let ds = Recording::create_dataset(&file, &meta)?;
 
-            let framesPerBlock = meta.framesPerBlock as usize;
-            let mut wait_block_ctr = 0;
-            // Indicate we are ready to rec!
-            if settings.startDelay > Duration::ZERO {
-                status.store(RecordStatus::Waiting);
-                let startdelay_s = settings.startDelay.as_micros() as Flt / 1e6;
-                wait_block_ctr =
-                    (meta.samplerate as Flt * startdelay_s / framesPerBlock as Flt) as u32;
-            } else {
-                status.store(RecordStatus::Recording(Duration::ZERO));
-            }
-
-            // Counter of stored blocks
-            let mut stored_ctr = 0;
-
-            // Offset in stream
-            let mut ctr_offset = 0;
-
-            // Flag indicating that the first RawStreamData package still has to
-            // be arrived
-            let mut first = true;
-
-            // Indicating the file is still empty (does not contain recorded data)
-            let mut empty_file = true;
-
-            let nchannels = meta.nchannels() as usize;
-            'recloop: loop {
-                if stopThread.load(SeqCst) {
-                    break 'recloop;
+                let framesPerBlock = meta.framesPerBlock as usize;
+                let mut wait_block_ctr = 0;
+                // Indicate we are ready to rec!
+                if settings.startDelay > Duration::ZERO {
+                    status.store(RecordStatus::Waiting {});
+                    let startdelay_s = settings.startDelay.as_micros() as Flt / 1e6;
+                    wait_block_ctr =
+                        (meta.samplerate as Flt * startdelay_s / framesPerBlock as Flt) as u32;
+                } else {
+                    status.store(RecordStatus::Recording {
+                        clipped: clipdetector.hasClipped(),
+                        recorded: 0.,
+                        pct_done: 0.,
+                    });
                 }
-                match rx.recv().unwrap() {
-                    InStreamMsg::StreamError(e) => {
-                        bail!("Recording failed due to stream error: {}.", e)
-                    }
-                    InStreamMsg::StreamStarted(_) => {
-                        bail!("Stream started again?")
-                    }
-                    InStreamMsg::StreamStopped => {
-                        // Early stop. User stopped it.
+
+                // Counter of stored blocks
+                let mut recorded_ctr = 0;
+
+                // Offset in stream
+                let mut incoming_ctr = 0;
+
+                // Flag indicating that the first RawStreamData package still has 
+                // arrived
+                let mut firstblockhasarrived = false;
+
+                // Indicating the file is still empty (does not contain recorded data)
+                let mut empty_file = true;
+
+                let nchannels = meta.nchannels() as usize;
+                'recloop: loop {
+                    if stopThread.load(Relaxed) {
                         break 'recloop;
                     }
-                    InStreamMsg::InStreamData(instreamdata) => {
-                        if first {
-                            first = false;
-                            // Initialize counter offset
-                            ctr_offset = instreamdata.ctr;
-                        } else if instreamdata.ctr != stored_ctr + ctr_offset {
-                            println!("********** PACKAGES MISSED ***********");
-                            bail!("Packages missed. Recording is invalid.")
+                    match rx.recv().unwrap() {
+                        InStreamMsg::StreamError(e) => {
+                            bail!("Recording failed due to stream error: {}.", e)
                         }
-
-                        if wait_block_ctr > 0 {
-                            // We are still waiting
-                            wait_block_ctr -= 1;
-                            if wait_block_ctr == 0 {
-                                status.store(RecordStatus::Recording(Duration::ZERO));
+                        InStreamMsg::StreamStarted(_) => {
+                            bail!("Stream started again?")
+                        }
+                        InStreamMsg::StreamStopped => {
+                            // Early stop. User stopped it.
+                            break 'recloop;
+                        }
+                        InStreamMsg::InStreamData(instreamdata) => {
+                            if ! firstblockhasarrived {
+                                // Toggle flag.
+                                firstblockhasarrived = true;
+                                // Initialize counter offset
+                                incoming_ctr = instreamdata.ctr;
+                            } else {
+                                incoming_ctr += 1;
                             }
-                            // TODO: Is it a good idea to increase the counter
-                            // here, as well as below?
-                            stored_ctr += 1;
-                            continue 'recloop;
-                        }
-
-                        ds.resize((stored_ctr + 1, framesPerBlock, nchannels))?;
-                        Recording::append_to_dset(
-                            &ds,
-                            stored_ctr,
-                            &instreamdata,
-                            framesPerBlock,
-                            nchannels,
-                        )?;
-                        // Once we have added to the file, this flag is swapped
-                        // and a file should be deleted in case of an error.
-                        empty_file = false;
-
-                        // Recorded time rounded of to milliseconds.
-                        let recorded_time = Duration::from_millis(
-                            ((1000 * (stored_ctr + 1) * framesPerBlock) as Flt / meta.samplerate)
-                                as u64,
-                        );
-
-                        if !settings.duration.is_zero() {
-                            // Duration not equal to zero, meaning we record up to a
-                            // certain duration.
-                            if recorded_time >= settings.duration {
-                                break 'recloop;
+                            if instreamdata.ctr != incoming_ctr {
+                                eprintln!("********** PACKAGES MISSED ***********");
+                                bail!("Stream data blocks missed. Recording is invalid.")
                             }
+
+                            if wait_block_ctr > 0 {
+                                // We are still waiting
+                                wait_block_ctr -= 1;
+                                if wait_block_ctr == 0 {
+                                    status.store(RecordStatus::Recording {
+                                        clipped: clipdetector.hasClipped(),
+                                        recorded: 0.,
+                                        pct_done: 0.,
+                                    });
+                                }
+                                continue 'recloop;
+                            }
+
+                            ds.resize((recorded_ctr + 1, framesPerBlock, nchannels))?;
+                            Recording::append_to_dset(
+                                &ds,
+                                recorded_ctr,
+                                &instreamdata,
+                                framesPerBlock,
+                                nchannels,
+                            )?;
+                            // Once we have added to the file, this flag is swapped
+                            // and a file should only be deleted in case of an error.
+                            empty_file = false;
+
+                            // Recorded time rounded of to milliseconds.
+                            let recorded_time = Duration::from_millis(
+                                ((1000 * (recorded_ctr + 1) * framesPerBlock) as Flt
+                                    / meta.samplerate) as u64,
+                            );
+
+                            if !settings.duration.is_zero() {
+                                // Duration not equal to zero, meaning we record up to a
+                                // certain duration.
+                                if recorded_time >= settings.duration {
+                                    break 'recloop;
+                                }
+                            }
+                            // println!("\n... {} {} {}", recorded_time.as_millis(), meta.samplerate, framesPerBlock);
+                            recorded_ctr += 1;
+                            status.store(RecordStatus::Recording {
+                                clipped: clipdetector.hasClipped(),
+                                recorded: recorded_time.as_secs_f64(),
+                                pct_done: if settings.duration > Duration::ZERO {
+                                    100. * recorded_time.as_millis() as Flt
+                                        / settings.duration.as_millis() as Flt
+                                } else {
+                                    0.
+                                },
+                            });
                         }
-                        // println!("\n... {} {} {}", recorded_time.as_millis(), meta.samplerate, framesPerBlock);
-                        stored_ctr += 1;
-                        status.store(RecordStatus::Recording(recorded_time));
                     }
+                } // end of 'recloop
+
+                if empty_file {
+                    bail!("Recording stopped before any data is stored.");
                 }
-            } // end of 'recloop
-
-            if empty_file {
-                bail!("Recording stopped before any data is stored.");
+                Ok(())
+            };
+            if let Err(e) = recording_closure() {
+                status.store(RecordStatus::Finished {
+                    clipped: clipdetector.hasClipped(),
+                    error: Some(format!("{e}")),
+                });
+            } else {
+                status.store(RecordStatus::Finished {
+                    clipped: clipdetector.hasClipped(),
+                    error: None,
+                });
+                // End of thread
             }
-
-            status.store(RecordStatus::Finished);
-            Ok(())
-            // End of thread
         });
 
         Ok(Recording {
             settings: settings_clone,
             stopThread: stopThread_clone,
-            handle: Some(handle),
-            last_status: RecordStatus::NoUpdate,
+            last_status: RecordStatus::NoUpdate {},
             status_from_thread: status_clone,
         })
     }
@@ -395,76 +469,75 @@ impl Recording {
     // occured), or when cancel() is called, or when recording object is dropped
     // while thread is still running.
     fn deleteFile(&self) {
-        if let Some(_) = self.handle {
-            panic!("Misuse bug: cannot delete file while thread is still running");
-        }
         // File should not be un use anymore, as thread is joined.
         // In case of error, we try to delete the file
         if let Err(e) = std::fs::remove_file(&self.settings.filename) {
             eprintln!("Recording failed, but file removal failed as well: {}", e);
         }
     }
-
-    // Join the thread, store the last status. Please make sure it is joinable,
-    // otherwise this method will hang forever.
-    fn cleanupThread(&mut self) {
-        if let Some(h) = self.handle.take() {
-            let res = h.join().unwrap();
-            if let Err(e) = res {
-                self.last_status = RecordStatus::Error(format!("{}", e));
-            }
-        }
+}
+#[cfg_attr(feature = "python-bindings", pymethods)]
+impl Recording {
+    #[cfg(feature = "python-bindings")]
+    #[new]
+    fn new_py(settings: RecordSettings, mgr: &mut StreamMgr) -> PyResult<Recording> {
+        Ok(Recording::new(settings, mgr)?)
     }
+
     /// Get current record status
     pub fn status(&mut self) -> RecordStatus {
         // Update status due to normal messaging
-        let status_from_thread = self.status_from_thread.swap(RecordStatus::NoUpdate);
+        let status_from_thread = self.status_from_thread.swap(RecordStatus::NoUpdate {});
         match status_from_thread {
-            RecordStatus::NoUpdate => {}
+            RecordStatus::NoUpdate {} => {}
             _ => {
                 self.last_status = status_from_thread;
             }
         }
 
-        if let Some(h) = &self.handle {
-            // Update the status by taking any error messages
-            if h.is_finished() {
-                self.cleanupThread();
-            }
-        }
         // Return latest status
         self.last_status.clone()
     }
 
     /// Stop existing recording early. At the current time, or st
     pub fn stop(&mut self) {
-        // Stop thread , join, update status
-        self.stopThread.store(true, SeqCst);
-        self.cleanupThread();
+        // Stop thread and wait for message of finished
+        self.stopThread.store(true, Relaxed);
+        self.waitForThread();
         match self.status() {
-            RecordStatus::Finished => { // Do nothing
+            RecordStatus::Finished { error, .. } => {
+                if error.is_some() {
+                    // Delete file if there was an error
+                    self.deleteFile();
+                }
             }
             _ => {
-                //  an error occured, we try to delete the backing file
-                self.deleteFile()
+                panic!("RecordStatus should be finished!");
             }
         }
     }
 
     /// Cancel recording. Deletes the recording file
     pub fn cancel(&mut self) {
-        self.stopThread.store(true, SeqCst);
-        self.cleanupThread();
+        self.stopThread.store(true, Relaxed);
+        self.waitForThread();
         self.deleteFile();
     }
+    fn waitForThread(&mut self) {
+        while !matches!(self.status(), RecordStatus::Finished { .. }) {
+            std::thread::sleep(Duration::from_millis(10));
+        }
+    }
 }
 
 impl Drop for Recording {
     fn drop(&mut self) {
-        if self.handle.is_some() {
-            // If we enter here, stop() or cancel() has not been called. In that
-            // case, we cleanup here by cancelling the recording
-            self.cancel();
+        // If we enter here, stop() or cancel() has not been called. In that
+        // case, we cleanup here by cancelling the recording and deleting the file.
+        if !matches!(self.status(), RecordStatus::Finished { .. }) {
+            self.stopThread.store(true, Relaxed);
+            self.waitForThread();
+            self.deleteFile();
         }
     }
 }

src/rt/mod.rs

@@ -4,6 +4,8 @@
 mod ppm;
 mod rtaps;
 mod rtview;
+mod simpleclip;
 pub use ppm::{PPM, ClipState};
 pub use rtaps::{RtAps, RtApsResult};
 pub use rtview::RtViewer;
+pub use simpleclip::SimpleClipDetector;

src/rt/simpleclip.rs

@@ -0,0 +1,78 @@
+use crate::daq::InStreamMsg;
+use crate::daq::StreamMgr;
+use crate::math::maxabs;
+use crate::Flt;
+use crossbeam::channel::bounded;
+use parking_lot::Mutex;
+use std::sync::atomic::Ordering::Relaxed;
+use std::{
+    sync::{atomic::AtomicBool, Arc},
+    time::Duration,
+};
+
+/// If signal is above this value, we indicate that the signal has clipped.
+const CLIP_STRONG_LIMIT: Flt = 0.999;
+
+/// Very simple clip detector. Used to detect cliping in a recording. Stores one
+/// clip value if just something happened between time of new and moment of drop().
+///
+pub struct SimpleClipDetector {
+    clipped: Arc<AtomicBool>,
+    stopThread: Arc<AtomicBool>,
+}
+
+impl SimpleClipDetector {
+    /// Create new clip detector
+    ///
+    /// # Args
+    ///
+    /// - `smgr` - see [StreamMgr]
+    pub fn new(smgr: &mut StreamMgr) -> Self {
+        let (tx, rx) = bounded(0);
+
+        let clipstate = Arc::new(AtomicBool::new(false));
+        let stopThread = Arc::new(AtomicBool::new(false));
+
+        let clipstate2 = clipstate.clone();
+        let stopThread2 = stopThread.clone();
+
+        smgr.addInQueue(tx);
+        rayon::spawn(move || loop {
+            if let Ok(msg) = rx.recv_timeout(Duration::from_millis(1500)) {
+                match msg {
+                    InStreamMsg::InStreamData(dat) => {
+                        let flt = dat.getFloatData();
+                        let maxabs = maxabs(flt.view());
+                        if maxabs >= CLIP_STRONG_LIMIT {
+                            clipstate.store(true, Relaxed);
+                            // We do not have to do anything anymore. The signal
+                            // has clipped so we do not have to check any new
+                            // blocks anymore.
+                            return;
+                        }
+                    }
+                    _ => {}
+                }
+            };
+            if stopThread.load(Relaxed) {
+                return;
+            }
+        });
+
+        Self {
+            clipped: clipstate2,
+            stopThread: stopThread2,
+        }
+    }
+
+    /// Check whether a clip has happened
+    pub fn hasClipped(&self) -> bool {
+        return self.clipped.load(Relaxed);
+    }
+}
+
+impl Drop for SimpleClipDetector {
+    fn drop(&mut self) {
+        self.stopThread.store(true, Relaxed);
+    }
+}

src/siggen/noise.rs

@@ -14,21 +14,72 @@ const PINKNOISE_ANALOG_ORDER: usize = 10;
 pub struct WhiteNoise {
     // SmallRng is a cheap random number generator
     rng: SmallRng,
+    // Interruption state (whether to output, number of samples, number of samples after which a switch need to be performed)
+    interrupt_state: Option<InterruptState>,
 }
 impl WhiteNoise {
-    pub fn new() -> Self {
+    pub fn new(fs: Flt, interrupt_period: Option<Flt>) -> Self {
+        let interrupt_state = if let Some(period) = interrupt_period {
+            if period > 0. {
+                Some(InterruptState {
+                    period,
+                    cur_idx: 0,
+                    max_idx: (period * fs) as usize,
+                    silence: false,
+                })
+            } else {
+                None
+            }
+        } else {
+            None
+        };
         WhiteNoise {
             rng: SmallRng::from_entropy(),
+            interrupt_state,
         }
     }
 }
 impl SourceImpl for WhiteNoise {
     fn genSignal_unscaled(&mut self, sig: &mut dyn ExactSizeIterator<Item = &mut Flt>) {
-        sig.for_each(|s| {
-            *s = self.rng.sample(StandardNormal);
-        });
+        let mut output = true;
+
+        // Look at whether we should do interruption of the played noise.
+        if let Some(InterruptState {
+            cur_idx,
+            max_idx,
+            silence,
+            ..
+        }) = &mut self.interrupt_state
+        {
+            if cur_idx > max_idx {
+                // Swap flag
+                *cur_idx = 0;
+                *silence = !*silence;
+            }
+            output = !*silence;
+            *cur_idx += sig.len();
+        }
+        // If output is true, send new random noise. Otherwise, just silence
+        if output {
+            sig.for_each(|s| {
+                *s = self.rng.sample(StandardNormal);
+            });
+        } else {
+            sig.for_each(|s| {
+                *s = 0.;
+            });
+        }
+    }
+
+    fn reset(&mut self, fs: Flt) {
+        if let Some(state) = &mut self.interrupt_state {
+            // Restore to first start with output
+            state.silence = false;
+            state.cur_idx = 0;
+            state.max_idx = (state.period * fs) as usize;
+            // state.period = untouched
+        }
     }
-    fn reset(&mut self, _fs: Flt) {}
     fn clone_dyn(&self) -> Box<dyn SourceImpl> {
         Box::new(self.clone())
     }
@@ -38,14 +89,18 @@ impl SourceImpl for WhiteNoise {
 pub struct ColoredNoise {
     // White noise generator
     wn: WhiteNoise,
+    // Temporary storage for the generated signal. Needs to be able to slice,
+    // which is not guaranteed by the input iterator.
     tmp: Vec<Flt>,
+    // Analog filter used to generate the digital filter below
     analogue_blueprint: ZPKModel,
+    // The digital filter that colors the white noise
     filter: SeriesBiquad,
 }
 impl ColoredNoise {
     /// Generate a colored noise signal source that outputs pink noise (-3 dB /
     /// octave ) from 20 Hz to 20 kHz.
-    pub fn newPinkNoise() -> Self {
+    pub fn newPinkNoise(fs: Flt, interrupt_period: Option<Flt>) -> Self {
         let twopi = 2. * pi;
         let fl = 10.;
         let fu = 20e3;
@@ -72,7 +127,7 @@ impl ColoredNoise {
         let analogue_blueprint = ZPKModel::new(zeros, poles, gain);
         let filter = analogue_blueprint.bilinear(480000.);
         Self {
-            wn: WhiteNoise::new(),
+            wn: WhiteNoise::new(fs, interrupt_period),
             tmp: vec![],
             analogue_blueprint,
             filter,
@@ -128,3 +183,11 @@ impl SourceImpl for ColoredNoise {
         Box::new(self.clone())
     }
 }
+
+#[derive(Clone, Copy, Debug)]
+struct InterruptState {
+    period: Flt,
+    cur_idx: usize,
+    max_idx: usize,
+    silence: bool,
+}

src/siggen/siggen.rs

@@ -11,6 +11,10 @@ use std::fmt::Debug;
 use std::iter::ExactSizeIterator;
 use std::slice::IterMut;
 
+/// Dummy sampling frequency to be filled in when the sampling frequency is
+/// still unknown at the point in time.
+pub const DUMMY_SAMPLING_FREQ: Flt = 48000.;
+
 /// Multiple channel signal generator. Able to create (acoustic) output signals. See above example on how to use.
 /// Typical signal that can be created are:
 ///
@@ -39,30 +43,9 @@ pub struct Siggen {
 #[cfg(feature = "python-bindings")]
 #[cfg_attr(feature = "python-bindings", pymethods)]
 impl Siggen {
-    #[pyo3(name = "newWhiteNoise")]
-    #[staticmethod]
-    fn newWhiteNoise_py(fs: Flt) -> Siggen {
-        Siggen::newWhiteNoise(fs, 0)
-    }
-    #[pyo3(name = "newSine")]
-    #[staticmethod]
-    fn newSine_py(fs: Flt, freq: Flt, nchannels: usize) -> PyResult<Siggen> {
-        Ok(Siggen::newSine(fs, nchannels, freq)?)
-    }
-    #[pyo3(name = "newSweep")]
-    #[staticmethod]
-    fn newSweep_py(
-        fs: Flt,
-        nchannels: usize,
-        fl: Flt,
-        fu: Flt,
-        sweep_time: Flt,
-        quiet_time: Flt,
-        sweep_type: SweepType,
-    ) -> Result<Self> {
-        Ok(Siggen::newSweep(
-            fs, nchannels, fl, fu, sweep_time, quiet_time, sweep_type,
-        )?)
+    #[new]
+    fn new_py() -> Self {
+        Siggen::new(1, Source::newSilence())
     }
 }
 
@@ -71,7 +54,7 @@ impl Siggen {
     /// # Args
     ///
     /// - `nchannels` - The number of channels to output
-    /// - `source` - Source function
+    /// - `source` - Source that generates the signal
     pub fn new(nchannels: usize, source: Source) -> Siggen {
         Siggen {
             fs: None,
@@ -131,8 +114,8 @@ impl Siggen {
     ///
     /// - `fs` - Sampling frequency \[Hz\]
     /// - `nchannels` - The number of channels to output
-    pub fn newWhiteNoise(_fs: Flt, nchannels: usize) -> Siggen {
-        Siggen::new(nchannels, Source::newWhiteNoise())
+    pub fn newWhiteNoise(fs: Flt, nchannels: usize, interrupt_period: Option<Flt>) -> Siggen {
+        Siggen::new(nchannels, Source::newWhiteNoise(fs, interrupt_period))
     }
 
     /// Returns the number of channels this signal generator is generating for.
@@ -278,7 +261,7 @@ mod test {
     fn test_whitenoise() {
         // This code is just to check syntax. We should really be listening to these outputs.
         let mut t = [0.0; 10];
-        Siggen::newWhiteNoise(1., 1).genSignal(&mut t);
+        Siggen::newWhiteNoise(1., 1, None).genSignal(&mut t);
         // println!("{:?}", &t);
     }
 
@@ -289,7 +272,7 @@ mod test {
         const N: usize = 10000;
         let mut s1 = [0.0; N];
         let mut s2 = [0.0; N];
-        let mut siggen = Siggen::newSine(1., 1, 1.0).unwrap();
+        let mut siggen = Siggen::newSine(10., 1, 1.0).unwrap();
 
         siggen.reset(10.0);
         siggen.setAllMute(false);

src/siggen/source.rs

@@ -1,6 +1,7 @@
 //! All sources for a signal generator. Sine waves, sweeps, noise, etc.
-use super::sweep::{SweepParams, SweepType};
 use super::noise::{ColoredNoise, WhiteNoise};
+use super::siggen::DUMMY_SAMPLING_FREQ;
+use super::sweep::{SweepParams, SweepType};
 use crate::config::*;
 use std::fmt::Debug;
 use std::ops::{Deref, DerefMut};
@@ -23,7 +24,10 @@ impl Source {
     ///
     /// # Args
     ///
-    /// - `fs` - Sampling frequency \[Hz\]
+    /// - `fs`: Sampling frequency \[Hz\]. When not known at the point in time,
+    ///   just fill in something sensible. If the [Siggen] runs in a
+    ///   [StreamMgr], the [StreamMgr] cals [Siggen::reset] to set the right
+    ///   sampling frequency.
     /// * `freq` - Frequency of the sine wave in \[Hz\]
     pub fn newSine(fs: Flt, freq: Flt) -> Result<Source> {
         Ok(Source {
@@ -39,15 +43,32 @@ impl Source {
     }
 
     /// Create a white noise signal source
-    pub fn newWhiteNoise() -> Source {
+    ///
+    /// # Args
+    ///
+    /// - `fs`: Sampling frequency \[Hz\]. When not known at the point in time,
+    ///   just fill in something sensible. If the [Siggen] runs in a
+    ///   [StreamMgr], the [StreamMgr] cals [Siggen::reset] to set the right
+    ///   sampling frequency.
+    /// - `interrupt_period` - when given AND > 0, this turns on and off the
+    ///   noise source with periods given by the value, in \[s\].
+    pub fn newWhiteNoise(fs: Flt, interrupt_period: Option<Flt>) -> Source {
         Source {
-            src: Box::new(WhiteNoise::new()),
+            src: Box::new(WhiteNoise::new(fs, interrupt_period)),
         }
     }
     /// Create a pink noise signal source
-    pub fn newPinkNoise() -> Source {
+    /// # Args
+    ///
+    /// - `fs`: Sampling frequency \[Hz\]. When not known at the point in time,
+    ///   just fill in something sensible. If the [Siggen] runs in a
+    ///   [StreamMgr], the [StreamMgr] cals [Siggen::reset] to set the right
+    ///   sampling frequency.
+    /// - `interrupt_period` - when given AND > 0, this turns on and off the
+    ///   noise source with periods given by the value, in \[s\].
+    pub fn newPinkNoise(fs: Flt, interrupt_period: Option<Flt>) -> Source {
         Source {
-            src: Box::new(ColoredNoise::newPinkNoise()),
+            src: Box::new(ColoredNoise::newPinkNoise(fs, interrupt_period)),
         }
     }
 
@@ -55,7 +76,10 @@ impl Source {
     ///
     /// # Args
     ///
-    /// - `fs` - Sample rate \[Hz\]
+    /// - `fs`: Sampling frequency \[Hz\]. When not known at the point in time,
+    ///   just fill in something sensible. If the [Siggen] runs in a
+    ///   [StreamMgr], the [StreamMgr] cals [Siggen::reset] to set the right
+    ///   sampling frequency.
     /// - `fl` - Lower frequency \[Hz\]
     /// - `fu` - Upper frequency \[Hz\]
     /// - `sweep_time` - The duration of a single sweep \[s\]
@@ -89,14 +113,14 @@ impl Source {
         Self::newSilence()
     }
     #[staticmethod]
-    #[pyo3(name = "newWhiteNoise")]
-    fn newWhiteNoise_py() -> Source {
-        Self::newWhiteNoise()
+    #[pyo3(name = "newWhiteNoise", signature=(interrupt_period=None))]
+    fn newWhiteNoise_py(interrupt_period: Option<Flt>) -> Source {
+        Self::newWhiteNoise(DUMMY_SAMPLING_FREQ, interrupt_period)
     }
     #[staticmethod]
-    #[pyo3(name = "newPinkNoise")]
-    fn newPinkNoise_py() -> Source {
-        Self::newPinkNoise()
+    #[pyo3(name = "newPinkNoise", signature=(interrupt_period=None))]
+    fn newPinkNoise_py(interrupt_period: Option<Flt>) -> Source {
+        Self::newPinkNoise(DUMMY_SAMPLING_FREQ, interrupt_period)
     }
     #[staticmethod]
     #[pyo3(name = "newSweep")]