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c++ - Output in PortAudio - Stack Overflow
https://stackoverflow.com/questions/65806332/output-in-portaudio#:~:text=PortAudio%20passes%20data%20from%20the%20input%20stream%20%28microphone%29,this%20case%20it%20is%20an%20instance%20of%20paTestData.
c++ - Output in PortAudio - Stack Overflow
https://stackoverflow.com/questions/65806332/output-in-portaudio
This is the callback function registered with PortAudio. PortAudio passes data from the input stream (microphone) to inputBuffer for processing by the user. The user passes data to outputBuffer that is sent to the sound card's output stream (speakers). userData is some value or struct passed when the callback is registered.
PortAudio: pa_process.h File Reference
http://www.portaudio.com/docs/v19-doxydocs-dev/pa__process_8h.html
The buffer adation algorithm used by the buffer processor was originally implemented by Stephan Letz for the ASIO version of PortAudio, and is described in his Callback_adaption_.pdf which is included in the distribution. The buffer processor performs sample conversion using the functions provided by pa_converters.c.
PortAudio: portaudio.h File Reference
http://files.portaudio.com/docs/v19-doxydocs/portaudio_8h.html
Definition at line 691 of file portaudio.h. #define paPrimeOutputBuffersUsingStreamCallback ( ( PaStreamFlags) 0x00000008) Call the stream callback to fill initial output buffers, rather than the default behavior of priming the buffers with zeros (silence). This flag has no effect for input-only and blocking read/write streams. See Also
PortAudio and Media Synchronisation - It's All in the …
http://www.portaudio.com/docs/portaudio_sync_acmc2003.pdf
PortAudio is built on top of host audio APIs, and as such does not have the option of dictating a buffering model. Instead it hides the host's model of buffer organisation and simply provides a callback requesting the application to fill a buffer.
https://portaudio.music.columbia.narkive.com/yt9bbMHR/choosing-framesperbuffer-values
PortAudio provides host-API specific query functions to discover these sizes in some cases (e.g. for ASIO in pa_asio.h). Post by Stefan Hajnoczi Perhaps the device buffers are power-of-2 sized or maybe influenced by USB message framing. Yes possibly. Some ASIO devices also have a user selected buffer size at the driver level.
c - PortAudio real-time audio processing for continuous ...
https://stackoverflow.com/questions/44645466/portaudio-real-time-audio-processing-for-continuous-input-stream
I am using PortAudio to implement a real-time audio processing. My primary task is to acquire data from mic continuously and provide 100 samples for processing (each FRAME = 100 samples at a time) to some other processing thread. Here is my callback collecting 100 samples each time on a continuous basis -. Sending each Frame of 100 samples to ...
PortAudio: Blocking Read/Write Functions
http://portaudio.com/docs/v19-doxydocs/blocking_read_write.html
PortAudio: Blocking Read/Write Functions. PortAudio. PortAudio V19 adds a huge advance over previous versions with a feature called Blocking I/O. Although it may have lower performance that the callback method described earlier in this tutorial, blocking I/O is easier to understand and is, in some cases, more compatible with third party systems ...
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