commit 7070b36549d511d6627538c73dfbab23fbae5b43
author Eric Laurent <elaurent@google.com> Fri Jul 16 07:43:46 2010 -0700
committer Eric Laurent <elaurent@google.com> Wed Jul 21 06:28:01 2010 -0700
tree 4a489b863b322e28f7047d7873b17a77056f3b41
parent d7514ec6eb17d262d6f9605a2c2f245b7ad7c0b9

Added support for auxiliary audio effects to AudioTrack and MediaPlayer.

Added methods to AudioTrack and MediaPlayer java classes to enable use of
auxiliary audio effects. The effect can be attached and detached by specifying its
ID and the send level controlled.

Change-Id: Ie74ff54a453096a742688476f612ce355543b6f3

media/libmediaplayerservice/MediaPlayerService.cpp

diff --git a/media/libmediaplayerservice/MediaPlayerService.cpp b/media/libmediaplayerservice/MediaPlayerService.cpp
index 5401ec0..b5972e7 100644
--- a/media/libmediaplayerservice/MediaPlayerService.cpp
+++ b/media/libmediaplayerservice/MediaPlayerService.cpp
@@ -329,6 +329,10 @@
     snprintf(buffer, 255, "  msec per frame(%f), latency (%d)\n",
             mMsecsPerFrame, mLatency);
     result.append(buffer);
+    snprintf(buffer, 255, "  aux effect id(%d), send level (%f)\n",
+            mAuxEffectId, mSendLevel);
+    result.append(buffer);
+
     ::write(fd, result.string(), result.size());
     if (mTrack != 0) {
         mTrack->dump(fd, args);
@@ -1093,6 +1097,21 @@
     return NO_ERROR;
 }
 
+status_t MediaPlayerService::Client::setAuxEffectSendLevel(float level)
+{
+    LOGV("[%d] setAuxEffectSendLevel(%f)", mConnId, level);
+    Mutex::Autolock l(mLock);
+    if (mAudioOutput != 0) return mAudioOutput->setAuxEffectSendLevel(level);
+    return NO_ERROR;
+}
+
+status_t MediaPlayerService::Client::attachAuxEffect(int effectId)
+{
+    LOGV("[%d] attachAuxEffect(%d)", mConnId, effectId);
+    Mutex::Autolock l(mLock);
+    if (mAudioOutput != 0) return mAudioOutput->attachAuxEffect(effectId);
+    return NO_ERROR;
+}
 
 void MediaPlayerService::Client::notify(void* cookie, int msg, int ext1, int ext2)
 {
@@ -1285,6 +1304,8 @@
     mRightVolume = 1.0;
     mLatency = 0;
     mMsecsPerFrame = 0;
+    mAuxEffectId = 0;
+    mSendLevel = 0.0;
     setMinBufferCount();
 }
 
@@ -1417,10 +1438,13 @@
 
     LOGV("setVolume");
     t->setVolume(mLeftVolume, mRightVolume);
+
     mMsecsPerFrame = 1.e3 / (float) sampleRate;
     mLatency = t->latency();
     mTrack = t;
-    return NO_ERROR;
+
+    t->setAuxEffectSendLevel(mSendLevel);
+    return t->attachAuxEffect(mAuxEffectId);;
 }
 
 void MediaPlayerService::AudioOutput::start()
@@ -1428,6 +1452,7 @@
     LOGV("start");
     if (mTrack) {
         mTrack->setVolume(mLeftVolume, mRightVolume);
+        mTrack->setAuxEffectSendLevel(mSendLevel);
         mTrack->start();
     }
 }
@@ -1481,6 +1506,26 @@
     }
 }
 
+status_t MediaPlayerService::AudioOutput::setAuxEffectSendLevel(float level)
+{
+    LOGV("setAuxEffectSendLevel(%f)", level);
+    mSendLevel = level;
+    if (mTrack) {
+        return mTrack->setAuxEffectSendLevel(level);
+    }
+    return NO_ERROR;
+}
+
+status_t MediaPlayerService::AudioOutput::attachAuxEffect(int effectId)
+{
+    LOGV("attachAuxEffect(%d)", effectId);
+    mAuxEffectId = effectId;
+    if (mTrack) {
+        return mTrack->attachAuxEffect(effectId);
+    }
+    return NO_ERROR;
+}
+
 // static
 void MediaPlayerService::AudioOutput::CallbackWrapper(
         int event, void *cookie, void *info) {