We have collected the most relevant information on Portaudio Callback Not Called. Open the URLs, which are collected below, and you will find all the info you are interested in.
Streams using NumPy Arrays — python-sounddevice, version 0.4.4
https://python-sounddevice.readthedocs.io/en/0.4.4/api/streams.html#:~:text=When%20a%20stream%20is%20running%2C%20PortAudio%20calls%20the,stream%20will%20be%20opened%20in%20%E2%80%9Cblocking%20read%2Fwrite%E2%80%9D%20mode.
c++ - Portaudio Callback Function Example - Stack Overflow
https://stackoverflow.com/questions/26172522/portaudio-callback-function-example
Many apps may want to use paFramesPerBufferUnspecified, which tells PortAudio to pick the best, possibly changing, buffer size.*/ patestCallback, /* this is your callback function */ &paData ); /*This is a pointer that will be passed to your callback*/. An example of a good callback function would be very useful, but of course any help is ...
PortAudio: Writing a Callback Function
http://www.portaudio.com/docs/v19-doxydocs/writing_a_callback.html
In addition, it is not safe to call any PortAudio API functions in the callback except as explicitly permitted in the documentation. Your callback function must return an int and accept the exact parameters specified in this typedef:
Callback function never called - arm · Issue #128 ...
https://github.com/RustAudio/rust-portaudio/issues/128
Using speaker-test produces sound without issue, but like @bburdette, the callback's not getting called. Interestingly, running the test example from portaudio-rs works fine, so looking at the differences between that and your library might help …
PortAudio Tutorial
https://www.ee.columbia.edu/~mim/meap/paMat/portaudio_v18_1/docs/pa_tut_callback.html
What is safe or not safe will vary from platform to platform. On the Macintosh, for example, you can only call "interrupt safe" routines. Also do not call any PortAudio functions in the callback except for Pa_StreamTime() and Pa_GetCPULoad(). Your callback function must return an int and accept the exact parameters specified in this typedef:
PortAudio: Starting, Stopping and Aborting a Stream
http://files.portaudio.com/docs/v19-doxydocs/start_stop_abort.html
PortAudio will not start playing back audio until you start the stream. After calling Pa_StartStream (), PortAudio will start calling your callback function to perform the audio processing. err = Pa_StartStream ( stream ); if ( err != paNoError ) goto error;
PortAudio: portaudio.h File Reference
http://files.portaudio.com/docs/v19-doxydocs/portaudio_8h.html
To ensure that the callback continues to be called, it should return paContinue (0). Either paComplete or paAbort can be returned to finish stream processing, after either of these values is returned the callback will not be called again. If paAbort is …
PortAudio Tutorial
https://www.ee.columbia.edu/~mim/meap/paMat/portaudio_v18_1/docs/pa_tut_over.html
Here are the steps to writing a PortAudio application: Write a callback function that will be called by PortAudio when audio processing is needed. Initialize the PA library and open a stream for audio I/O. Start the stream. Your callback function will …
python - PyAudio callback being called only once - Stack ...
https://stackoverflow.com/questions/52415883/pyaudio-callback-being-called-only-once
The thing is frames_per_buffer does not represent bytes but acrual frames. So since you specify the format as being pyaudio.paInt24 that means that one frames is represented by 3 bytes (24 / 8). So in your callback you should be returning 3072 bytes or the callback will not be called again for some reason. If you were using blocking mode and ...
PortAudio: pa_process.h File Reference
http://www.portaudio.com/docs/v19-doxydocs-dev/pa__process_8h.html
If paComplete is passed, the stream callback will not be called but any audio that was generated by previous stream callbacks will be copied to the output buffer(s). You can check whether the buffer processor's internal buffer is empty by calling PaUtil_IsBufferProcessorOutputEmpty.
Streams using NumPy Arrays — python-sounddevice, version 0.4.4
https://python-sounddevice.readthedocs.io/en/0.4.4/api/streams.html
callback (callable, optional) – User-supplied function to consume, process or generate audio data in response to requests from an active stream. When a stream is running, PortAudio calls the stream callback periodically. The callback function is responsible for processing and filling input and output buffers, respectively.
Now you know Portaudio Callback Not Called
Now that you know Portaudio Callback Not Called, we suggest that you familiarize yourself with information on similar questions.
