Portaudio Callback Return

Proposed Changes to PortAudio

http://portaudio.com/docs/proposals/019-NotifyClientWhenAllBuffersHavePlayed.html#:~:text=PortAudio%20allows%20clients%20to%20terminate%20a%20stream%20by,stream%20has%20actually%20completed%20playing%20all%20audio%20data.

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c++ - Portaudio Callback Function Example - Stack Overflow

https://stackoverflow.com/questions/26172522/portaudio-callback-function-example

PortAudio: Writing a Callback Function

http://www.portaudio.com/docs/v19-doxydocs/writing_a_callback.html

PortAudio: portaudio.h File Reference

http://files.portaudio.com/docs/v19-doxydocs/portaudio_8h.html

PortAudio - an Open-Source Cross-Platform Audio API

http://portaudio.com/

Proposed Changes to PortAudio

http://portaudio.com/docs/proposals/019-NotifyClientWhenAllBuffersHavePlayed.html

PortAudio Tutorial - Columbia University

https://www.ee.columbia.edu/~mim/meap/paMat/portaudio_v18_1/docs/pa_tut_callback.html

Your callback function must return an int and accept the exact parameters specified in this typedef: typedef int (PortAudioCallback)( void *inputBuffer, void *outputBuffer, unsigned long framesPerBuffer, PaTimestamp outTime, void *userData );

PyAudio Documentation — PyAudio 0.2.11 documentation

https://people.csail.mit.edu/hubert/pyaudio/docs/

PyAudio # define callback (2) def callback (in_data, frame_count, time_info, status): data = wf. readframes (frame_count) return (data, pyaudio. paContinue) # open stream using callback (3) stream = p. open (format = p. get_format_from_width (wf. getsampwidth ()), channels = wf. getnchannels (), rate = wf. getframerate (), output = True, stream_callback = callback) # start …

Streams using NumPy Arrays — python-sounddevice, version 0.4.4

https://python-sounddevice.readthedocs.io/en/0.4.4/api/streams.html

In order for a stream to maintain glitch-free operation the callback must consume and return audio data faster than it is recorded and/or played. PortAudio anticipates that each callback invocation may execute for a duration approaching the duration of frames audio frames at the stream’s sampling frequency. It is reasonable to expect to be able to utilise 70% or more of the …

Python - pyaudio - DevTut

https://devtut.github.io/python/pyaudio.html

In callback mode, PyAudio will call a specified callback function (2) whenever it needs new audio data (to play) and/or when there is new (recorded) audio data available. Note that PyAudio calls the callback function in a separate thread. The function has the following signature callback (<input_data>, <frame_count>, <time_info>, <status_flag>) and must return a tuple containing …