Revert "Revert "mediaplayer: make frame-accurate avsync configurable""

This reverts commit e17afa888040eb5fbd31249305efd88ee03bb5bc.

Change-Id: I7afb6a055d3efb08fdbdff19f0bbad01934614e8

1 files changed, 18 insertions, 0 deletions

diff --git a/media/libmediaplayerservice/nuplayer/NuPlayerRenderer.cpp b/media/libmediaplayerservice/nuplayer/NuPlayerRenderer.cpp
index aa993a9..9d2f134 100644
--- a/media/libmediaplayerservice/nuplayer/NuPlayerRenderer.cpp
+++ b/media/libmediaplayerservice/nuplayer/NuPlayerRenderer.cpp
@@ -83,6 +83,16 @@ const NuPlayer::Renderer::PcmInfo NuPlayer::Renderer::AUDIO_PCMINFO_INITIALIZER
 // static
 const int64_t NuPlayer::Renderer::kMinPositionUpdateDelayUs = 100000ll;
 
+static bool sFrameAccurateAVsync = false;
+
+static void readProperties() {
+    char value[PROPERTY_VALUE_MAX];
+    if (property_get("persist.sys.media.avsync", value, NULL)) {
+        sFrameAccurateAVsync =
+            !strcmp("1", value) || !strcasecmp("true", value);
+    }
+}
+
 NuPlayer::Renderer::Renderer(
         const sp<MediaPlayerBase::AudioSink> &sink,
         const sp<AMessage> &notify,
@@ -124,6 +134,7 @@ NuPlayer::Renderer::Renderer(
     mMediaClock = new MediaClock;
     mPlaybackRate = mPlaybackSettings.mSpeed;
     mMediaClock->setPlaybackRate(mPlaybackRate);
+    readProperties();
 }
 
 NuPlayer::Renderer::~Renderer() {
@@ -1065,6 +1076,11 @@ void NuPlayer::Renderer::postDrainVideoQueue() {
 
     ALOGW_IF(delayUs > 500000, "unusually high delayUs: %" PRId64, delayUs);
     // post 2 display refreshes before rendering is due
+    // FIXME currently this increases power consumption, so unless frame-accurate
+    // AV sync is requested, post closer to required render time (at 0.63 vsyncs)
+    if (!sFrameAccurateAVsync) {
+        twoVsyncsUs >>= 4;
+    }
     msg->post(delayUs > twoVsyncsUs ? delayUs - twoVsyncsUs : 0);
 
     mDrainVideoQueuePending = true;
@@ -1477,6 +1493,8 @@ void NuPlayer::Renderer::onPause() {
 }
 
 void NuPlayer::Renderer::onResume() {
+    readProperties();
+
     if (!mPaused) {
         return;
     }