stagefright: Resurrect PCM offload

 * Forward-port the open-source code from L which was moved to closed-source
   in M. This is being done out of necessity- the architecture chosen by
   Qualcomm is not optimal and doesn't work well with a singular
   codebase which attempts to service a large number of devices.
 * This patch brings in the code to support PCM offload (AudioFlinger
   bypass). This allows for playback of high resolution clips without
   decimation stages, and enables reduced power consumption for audio
   pipelines which take advantage of the Hexagon DSP (effects).

Change-Id: I0ef15fc3df538ab723f3c12ce0ed71d0e607c99e

1 files changed, 6 insertions, 4 deletions

diff --git a/media/libmediaplayerservice/nuplayer/NuPlayer.h b/media/libmediaplayerservice/nuplayer/NuPlayer.h
index ee0f3e6..c093b0f 100644
--- a/media/libmediaplayerservice/nuplayer/NuPlayer.h
+++ b/media/libmediaplayerservice/nuplayer/NuPlayer.h
@@ -86,11 +86,12 @@ protected:
     virtual ~NuPlayer();
 
     virtual void onMessageReceived(const sp<AMessage> &msg);
-    virtual bool ifDecodedPCMOffload() {return false;}
-    virtual void setDecodedPcmOffload(bool /*decodePcmOffload*/) {}
-    virtual bool canOffloadDecodedPCMStream(const sp<MetaData> /*meta*/,
-            bool /*hasVideo*/, bool /*isStreaming*/, audio_stream_type_t /*streamType*/) {return false;}
+    virtual bool ifDecodedPCMOffload();
+    virtual void setDecodedPcmOffload(bool decodePcmOffload);
+    virtual bool canOffloadDecodedPCMStream(const sp<MetaData> meta,
+            bool hasVideo, bool isStreaming, audio_stream_type_t streamType);
     static bool IsHTTPLiveURL(const char *url);
+
 public:
     struct NuPlayerStreamListener;
     struct Source;
@@ -151,6 +152,7 @@ protected:
     sp<MediaPlayerBase::AudioSink> mAudioSink;
     sp<DecoderBase> mVideoDecoder;
     bool mOffloadAudio;
+    bool mOffloadDecodedPCM;
     sp<DecoderBase> mAudioDecoder;
     sp<CCDecoder> mCCDecoder;
     sp<Renderer> mRenderer;