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io-audio - QNX
https://www.qnx.com/developers/docs/6.5.0SP1.update/com.qnx.doc.neutrino_utilities/i/io-audio.html
All audio drivers support the following card options: unit=number The card number to mount the driver as. dindex=number The device number that additional following options apply to. play_name=name The symbolic name to assign to the PCM playback device. cap_name=name The symbolic name to assign to the PCM capture device.
Organization of a Driver - qnx.com
https://www.qnx.com/developers/docs/6.5.0SP1/ddk_en/audio/architecture.html
How the driver fits into the QNX audio system. Everything to the right of the Process memory boundary is the audio driver. To complete the audio driver for your audio card, you have to build only the Audio HW DLL. Audio application Produces PCM data and then makes a series of QNX Audio API calls to send this data to the Audio card.
io-audio - qnx.com
https://www.qnx.com/developers/docs/7.0.0/com.qnx.doc.neutrino.utilities/topic/i/io-audio.html
All audio drivers support the following card options: cap_name= name The symbolic name to assign to the PCM capture device. ... See “ Understanding audio ducking” in the “Audio Concurrency Management” chapter in the QNX Neutrino Audio Developer's Guide. ms_frag_period: sw_mixer_ms (when the local playback device is a PCM Software Mixer ...
About This Guide - QNX
https://www.qnx.com/developers/docs/6.6.0.update/com.qnx.doc.neutrino.audio/topic/about.html
The key components of the QNX Audio driver architecture include: io-audio Audio system manager. deva-ctrl-*.so Audio drivers. For example, the audio driver for the Ensoniq Audio PCI cards is deva-ctrl-audiopci.so. deva-*audio drivers in the Utilities Reference. deva-acs-*.so Acoustic Control Server. deva-afm-*.so
Board Support Packages - qnx.com
https://www.qnx.com/developers/docs/7.1/com.qnx.doc.qnxsdp.migration/topic/bsps.html
Audio drivers. Updates to io-audio require audio drivers (deva-*) to make some minor modifications to work in QNX SDP 7.1.. QSA trigger callbacks To allow a deva -* driver to respond to a stop based on its cause, the ADO_PCM_TRIGGER_STOP command in the pcm_trigger enumeration is now replaced by two commands:
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