From 93c3d41bdb15e39dac0faea9c5b60f1637cd477c Mon Sep 17 00:00:00 2001 From: Eric Laurent Date: Fri, 1 Aug 2014 14:48:35 -0700 Subject: AudioSystem: add API to query audio HW sync source Add a method to query from the audio HAL the HW sync source used for a given audio session. Modify audio policy to select a direct output with HW sync when requested. Bug: 16132368. Change-Id: I03038f9188f2d389f8a5fd76a671854013a4513e --- services/audioflinger/AudioFlinger.cpp | 19 +++++++++++++++++++ services/audioflinger/AudioFlinger.h | 3 +++ 2 files changed, 22 insertions(+) (limited to 'services/audioflinger') diff --git a/services/audioflinger/AudioFlinger.cpp b/services/audioflinger/AudioFlinger.cpp index b8cc33a..1f77b2f 100644 --- a/services/audioflinger/AudioFlinger.cpp +++ b/services/audioflinger/AudioFlinger.cpp @@ -1579,6 +1579,25 @@ status_t AudioFlinger::setLowRamDevice(bool isLowRamDevice) return NO_ERROR; } +audio_hw_sync_t AudioFlinger::getAudioHwSyncForSession(audio_session_t sessionId) +{ + Mutex::Autolock _l(mLock); + for (size_t i = 0; i < mPlaybackThreads.size(); i++) { + sp thread = mPlaybackThreads.valueAt(i); + if ((thread->hasAudioSession(sessionId) & ThreadBase::TRACK_SESSION) != 0) { + // A session can only be on one thread, so exit after first match + String8 reply = thread->getParameters(String8(AUDIO_PARAMETER_STREAM_HW_AV_SYNC)); + AudioParameter param = AudioParameter(reply); + int value; + if (param.getInt(String8(AUDIO_PARAMETER_STREAM_HW_AV_SYNC), value) == NO_ERROR) { + return value; + } + break; + } + } + return AUDIO_HW_SYNC_INVALID; +} + // ---------------------------------------------------------------------------- diff --git a/services/audioflinger/AudioFlinger.h b/services/audioflinger/AudioFlinger.h index 31c5a1a..4e9d49b 100644 --- a/services/audioflinger/AudioFlinger.h +++ b/services/audioflinger/AudioFlinger.h @@ -248,6 +248,9 @@ public: /* Set audio port configuration */ virtual status_t setAudioPortConfig(const struct audio_port_config *config); + /* Get the HW synchronization source used for an audio session */ + virtual audio_hw_sync_t getAudioHwSyncForSession(audio_session_t sessionId); + virtual status_t onTransact( uint32_t code, const Parcel& data, -- cgit v1.1