Add support for deep audio buffers

Allow AudioSink to use deep audio buffering when the
source is audio only and its duration is more than
a certain threshold.
This helps improve battery life but implies higher
audio latency.

Change-Id: Ie79915b61c370292f05aabda9779356570e03cbb

1 files changed, 12 insertions, 1 deletions

diff --git a/media/libstagefright/AwesomePlayer.cpp b/media/libstagefright/AwesomePlayer.cpp
index b67476b..b15cb67 100644
--- a/media/libstagefright/AwesomePlayer.cpp
+++ b/media/libstagefright/AwesomePlayer.cpp
@@ -870,7 +870,18 @@ status_t AwesomePlayer::play_l() {
     if (mAudioSource != NULL) {
         if (mAudioPlayer == NULL) {
             if (mAudioSink != NULL) {
-                mAudioPlayer = new AudioPlayer(mAudioSink, this);
+                bool allowDeepBuffering;
+                int64_t cachedDurationUs;
+                bool eos;
+                if (mVideoSource == NULL && (mDurationUs > AUDIO_SINK_MIN_DEEP_BUFFER_DURATION_US ||
+                        getCachedDuration_l(&cachedDurationUs, &eos) &&
+                        cachedDurationUs > AUDIO_SINK_MIN_DEEP_BUFFER_DURATION_US)) {
+                    allowDeepBuffering = true;
+                } else {
+                    allowDeepBuffering = false;
+                }
+
+                mAudioPlayer = new AudioPlayer(mAudioSink, allowDeepBuffering, this);
                 mAudioPlayer->setSource(mAudioSource);
 
                 mTimeSource = mAudioPlayer;