Audio support

I have some research to be able playing audio on DS4. Audio data send by opcode 0x14, 0x15, 0x17, 0x19. And code by SBC audio codec. I used this python script to wrap the audio data play.py This script takes the SBC audio data and send it to DS4 You can use gstreamer to prepare audio data. gst-launch-1.0 -q audiotestsrc ! sbcenc ! 'audio/x-sbc,channels=2,rate=32000,channel-mode=dual,blocks=16,subbands=8,bitpool=25' ! queue ! fdsink | ./play.py But there is a small problem, periodically occur stuttering. But it may be caused by improper operation with HID device. I hope this helps to add audio support.

[poconbhui]

Sure, it generates the SBC header, but it doesn’t generate the payload header. Each SBC frame with the current settings is 112 bytes long, so each report sent to the ds4 contains 4 SBC frames, each with an SBC frame header generated by gstreamer, but those 4 have their own header, the payload header, where \x02 is, which should be 00100100, following section 6.1 of the sbc doc I linked. Gstreamer can’t generate this header because it doesn’t know how many SBC frames are going to be put in a payload.

The only two things that seem to make a difference is setting the L bit to 0 causes the right channel to be very quiet and not setting the #frames to something > 1 causes the sound to jitter, or just not work.

[poconbhui]

Ok, I have a working gstreamer version at https://gist.github.com/poconbhui/ab3ea6c5b827c969bd0cc8d76575a0a2 .