libmedia : audio: handle set playback rate when direct pcm used

- In direct PCM usecase if setplayback rate is called then
  invalidate the common block and send empty offload structure
  below to use default path.

CRs-Fixed: 916660
Change-Id: I6df7c10b7115c77a19564e2f9fabc511d76a2410

1 files changed, 23 insertions, 5 deletions

diff --git a/media/libmedia/AudioTrack.cpp b/media/libmedia/AudioTrack.cpp
index 2d9fcf7..ff0f35a 100644
--- a/media/libmedia/AudioTrack.cpp
+++ b/media/libmedia/AudioTrack.cpp
@@ -31,6 +31,7 @@
 #include <media/AudioPolicyHelper.h>
 #include <media/AudioResamplerPublic.h>
 #include "media/AVMediaExtensions.h"
+#include <cutils/properties.h>
 
 #define WAIT_PERIOD_MS                  10
 #define WAIT_STREAM_END_TIMEOUT_SEC     120
@@ -168,7 +169,8 @@ AudioTrack::AudioTrack()
       mPreviousPriority(ANDROID_PRIORITY_NORMAL),
       mPreviousSchedulingGroup(SP_DEFAULT),
       mPausedPosition(0),
-      mSelectedDeviceId(AUDIO_PORT_HANDLE_NONE)
+      mSelectedDeviceId(AUDIO_PORT_HANDLE_NONE),
+      mPlaybackRateSet(false)
 {
     mAttributes.content_type = AUDIO_CONTENT_TYPE_UNKNOWN;
     mAttributes.usage = AUDIO_USAGE_UNKNOWN;
@@ -198,7 +200,8 @@ AudioTrack::AudioTrack(
       mPreviousPriority(ANDROID_PRIORITY_NORMAL),
       mPreviousSchedulingGroup(SP_DEFAULT),
       mPausedPosition(0),
-      mSelectedDeviceId(AUDIO_PORT_HANDLE_NONE)
+      mSelectedDeviceId(AUDIO_PORT_HANDLE_NONE),
+      mPlaybackRateSet(false)
 {
     mStatus = set(streamType, sampleRate, format, channelMask,
             frameCount, flags, cbf, user, notificationFrames,
@@ -228,7 +231,8 @@ AudioTrack::AudioTrack(
       mPreviousPriority(ANDROID_PRIORITY_NORMAL),
       mPreviousSchedulingGroup(SP_DEFAULT),
       mPausedPosition(0),
-      mSelectedDeviceId(AUDIO_PORT_HANDLE_NONE)
+      mSelectedDeviceId(AUDIO_PORT_HANDLE_NONE),
+      mPlaybackRateSet(false)
 {
     mStatus = set(streamType, sampleRate, format, channelMask,
             0 /*frameCount*/, flags, cbf, user, notificationFrames,
@@ -844,6 +848,15 @@ status_t AudioTrack::setPlaybackRate(const AudioPlaybackRate &playbackRate)
     //set effective rates
     mProxy->setPlaybackRate(playbackRateTemp);
     mProxy->setSampleRate(effectiveRate); // FIXME: not quite "atomic" with setPlaybackRate
+
+    // fallback out of Direct PCM if setPlaybackRate is called on PCM track
+    if (property_get_bool("audio.offload.track.enable", false) &&
+        (mFormat == AUDIO_FORMAT_PCM_16_BIT) && (mOffloadInfo == NULL) &&
+        (mFlags == AUDIO_OUTPUT_FLAG_NONE)) {
+        mPlaybackRateSet = true;
+        android_atomic_or(CBLK_INVALID, &mCblk->mFlags);
+    }
+
     return NO_ERROR;
 }
 
@@ -1135,11 +1148,16 @@ status_t AudioTrack::createTrack_l()
     audio_stream_type_t streamType = mStreamType;
     audio_attributes_t *attr = (mStreamType == AUDIO_STREAM_DEFAULT) ? &mAttributes : NULL;
 
-    status_t status;
-    status = AudioSystem::getOutputForAttr(attr, &output,
+    audio_offload_info_t tOffloadInfo = AUDIO_INFO_INITIALIZER;
+    if (mPlaybackRateSet == true && mOffloadInfo == NULL && mFormat == AUDIO_FORMAT_PCM_16_BIT) {
+        mOffloadInfo = &tOffloadInfo;
+    }
+    status_t status = AudioSystem::getOutputForAttr(attr, &output,
                                            (audio_session_t)mSessionId, &streamType, mClientUid,
                                            mSampleRate, mFormat, mChannelMask,
                                            mFlags, mSelectedDeviceId, mOffloadInfo);
+    //reset offload info if forced
+    mOffloadInfo = (mOffloadInfo == &tOffloadInfo) ? NULL : mOffloadInfo;
 
     if (status != NO_ERROR || output == AUDIO_IO_HANDLE_NONE) {
         ALOGE("Could not get audio output for session %d, stream type %d, usage %d, sample rate %u, format %#x,"