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c - PortAudio callbacks, and changing a variable elsewhere ...
https://stackoverflow.com/questions/38341423/portaudio-callbacks-and-changing-a-variable-elsewhere#:~:text=The%20PortAudio%20callback%20documentation%20states%3A%20Before%20we%20begin%2C,the%20same%20as%20the%20rest%20of%20your%20code.
PortAudio: Writing a Callback Function
http://www.portaudio.com/docs/v19-doxydocs/writing_a_callback.html
The "callback" is a function that is called by the PortAudio engine whenever it has captured audio data, or when it needs more audio data for output. Before we begin, it's important to realize that the callback is a delicate place. This is because some systems perform the callback in a special thread, or interrupt handler, and it is rarely ...
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] Allow tweaking PA callback thread scheduler ...
https://portaudio.music.columbia.narkive.com/LdhaG1PP/allow-tweaking-pa-callback-thread-scheduler-and-priority
PortAudio stream was getting interrupted with overflows and underflows now and then, because PA callback thread was getting pre-empted by other threads. The default PortAudio real-time scheduling was being set to SCHED_FIFO at a priority of 1. To work around the issue, I changed the PortAudio callback thread to use
PortAudio creating unnecessary threads for blocking read ...
https://github.com/PortAudio/portaudio/issues/471
Hello. PortAudio creates a new independent thread when calling Pa_OpenStream, even if no Callback method is used (parameter StreamCallback and Userdata = NUL).. In doc there is: I/O Methods: callback and read/write. PortAudio offers two methods for communicating audio data between an open Stream and your Application: (1) an asynchronous callback interface, where …
PortAudio - an Open-Source Cross-Platform Audio API
http://www.portaudio.com/faq.html
We do not recommend doing file I/O in the PortAudio callback because the callback is run at a very high priority. We recommend reading the data in a normal priority thread then writing it to a FIFO which is read by the PortAudio callback. V19 has …
PortAudio: Blocking Read/Write Functions
http://portaudio.com/docs/v19-doxydocs/blocking_read_write.html
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 than the callback method.
[Portaudio] Lock free queue for callback thread
https://portaudio.music.columbia.narkive.com/R7oogR0M/lock-free-queue-for-callback-thread
[Portaudio] Lock free queue for callback thread ChordWizard Software 2012-04-10 20:59:43 UTC. Permalink. Hi Ross, Thanks for all your advice last week, with that and a lot of study on the weekend, I'm feeling much better oriented with PortAudio now.
PortAudio - an Open-Source Cross-Platform Audio API
PortAudio provides a very simple API for recording and/or playing sound using a simple callback function or a blocking read/write interface. Example programs are included that play sine waves, process audio input (guitar fuzz), record and playback audio, list available audio devices, etc.
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