[WFD] Connect WiFi display, plug in wired headphones, sound should go to headset side

[WFD] Connect WiFi display, plug in wired headphones, sound should go to headset side[DESCRIPTION]

Connect WiFi display, plug in Wired headphones, play music or multimedia, sound on the TV side.

[Solution]

This is the Android default design, if you want to change, modify the policy section,
AudioPolicyManager.cpp's Getdeviceforstrategy function,
Case Strategy_media,
Will enter the IF (!mchangepriorsubmix) selection to Device2 = Availableoutputdevicetypes &
Audio_device_out_remote_submix;
This audio_device_out_remote_submix is 0x8000.
If you want to switch out from the headset, modify the following:
Case Strategy_media: {
uint32_t device2 = Audio_device_none;
#ifdef Mtk_audio
if (!mchangepriorsubmix) {
#endif
if (strategy! = strategy_sonification) {
No sonification on remote submix (e.g. WFD)
if (Availableoutputdevicetypes&audio_device_out_wired_headphone)
{
Device2 = availableoutputdevicetypes & Audio_device_out_wired_headphone;
}else if (availableoutputdevicetypes&audio_device_out_wired_headset)
{
Device2 = availableoutputdevicetypes & Audio_device_out_wired_headset;
}else{
Device2 = availableoutputdevicetypes & Audio_device_out_remote_submix;
}
}