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author | Eric Laurent <elaurent@google.com> | 2014-08-01 14:48:35 -0700 |
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committer | Eric Laurent <elaurent@google.com> | 2014-08-06 00:38:23 +0000 |
commit | 93c3d41bdb15e39dac0faea9c5b60f1637cd477c (patch) | |
tree | a0d739ad732f10bc9d4548923c78c590841b14da /services/audioflinger/AudioFlinger.cpp | |
parent | 92ce4715315bddd158c7d4028556632f0547e3b9 (diff) | |
download | frameworks_av-93c3d41bdb15e39dac0faea9c5b60f1637cd477c.zip frameworks_av-93c3d41bdb15e39dac0faea9c5b60f1637cd477c.tar.gz frameworks_av-93c3d41bdb15e39dac0faea9c5b60f1637cd477c.tar.bz2 |
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
Diffstat (limited to 'services/audioflinger/AudioFlinger.cpp')
-rw-r--r-- | services/audioflinger/AudioFlinger.cpp | 19 |
1 files changed, 19 insertions, 0 deletions
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<PlaybackThread> 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; +} + // ---------------------------------------------------------------------------- |