Fix issue 2285561: New AudioFlinger and audio driver API needed for A/V sync
Added getRenderPosition() API to IAudioFlinger to retreive number of audio frames
written by AudioFlinger to audio HAL and by DSP to DAC.
Added getRenderPosition() API to AudioHardwareInterface to retreive number of audio frames
written by DSP to DAC.
Exposed AudioTrack::getPosition() to AudioSink() to make it available to media player.
Removed excessive log in AudioHardwareGeneric.
diff --git a/include/media/AudioSystem.h b/include/media/AudioSystem.h
index b42bf54..42bb4df 100644
--- a/include/media/AudioSystem.h
+++ b/include/media/AudioSystem.h
@@ -222,6 +222,17 @@
static status_t setVoiceVolume(float volume);
+ // return the number of audio frames written by AudioFlinger to audio HAL and
+ // audio dsp to DAC since the output on which the specificed stream is playing
+ // has exited standby.
+ // returned status (from utils/Errors.h) can be:
+ // - NO_ERROR: successful operation, halFrames and dspFrames point to valid data
+ // - INVALID_OPERATION: Not supported on current hardware platform
+ // - BAD_VALUE: invalid parameter
+ // NOTE: this feature is not supported on all hardware platforms and it is
+ // necessary to check returned status before using the returned values.
+ static status_t getRenderPosition(uint32_t *halFrames, uint32_t *dspFrames, int stream = DEFAULT);
+
//
// AudioPolicyService interface
//