commit 9816016afb2a13c6a866cd047d57020566a8b9a9
author Wei Jia <wjia@google.com> Wed Feb 04 17:01:11 2015 -0800
committer Wei Jia <wjia@google.com> Tue Feb 24 16:34:11 2015 -0800
tree 176a616a7d5da21447e880158cef57516efee9c3
parent 658fc18d8e632441cd5d83a4f74b53620cbac1fe

mediaplayer: support dynamic playback rate

Bug: 19196501

Change-Id: I856b1507d5fa2cedfb645706d2435683a7d3e050

media/libmedia/mediaplayer.cpp

diff --git a/media/libmedia/mediaplayer.cpp b/media/libmedia/mediaplayer.cpp
index 432ecda..d1d51cc 100644
--- a/media/libmedia/mediaplayer.cpp
+++ b/media/libmedia/mediaplayer.cpp
@@ -59,6 +59,7 @@
     mLoop = false;
     mLeftVolume = mRightVolume = 1.0;
     mVideoWidth = mVideoHeight = 0;
+    mPlaybackRate = 1.0;
     mLockThreadId = 0;
     mAudioSessionId = AudioSystem::newAudioUniqueId();
     AudioSystem::acquireAudioSessionId(mAudioSessionId, -1);
@@ -378,6 +379,24 @@
     return false;
 }
 
+status_t MediaPlayer::setPlaybackRate(float rate)
+{
+    ALOGV("setPlaybackRate: %f", rate);
+    if (rate <= 0.0) {
+        return BAD_VALUE;
+    }
+    Mutex::Autolock _l(mLock);
+    if (mPlayer != 0) {
+        if (mPlaybackRate == rate) {
+            return NO_ERROR;
+        }
+        mPlaybackRate = rate;
+        return mPlayer->setPlaybackRate(rate);
+    }
+    ALOGV("setPlaybackRate: no active player");
+    return INVALID_OPERATION;
+}
+
 status_t MediaPlayer::getVideoWidth(int *w)
 {
     ALOGV("getVideoWidth");