Revert "libstagefright: Convert mono to stereo for LPA clips"

Change-Id: Ib6cc3401c889a8ec52dc83e3bea367f94a582a40

1 files changed, 16 insertions, 52 deletions

diff --git a/media/libstagefright/LPAPlayerALSA.cpp b/media/libstagefright/LPAPlayerALSA.cpp
index 18aae8f..38d6bac 100644
--- a/media/libstagefright/LPAPlayerALSA.cpp
+++ b/media/libstagefright/LPAPlayerALSA.cpp
@@ -87,8 +87,7 @@ mAudioSink(audioSink),
 mObserver(observer) {
     ALOGV("LPAPlayer::LPAPlayer() ctor");
     objectsAlive++;
-    mNumOutputChannels =0;
-    mNumInputChannels = 0;
+    numChannels =0;
     mPaused = false;
     mIsA2DPEnabled = false;
     mAudioFlinger = NULL;
@@ -257,24 +256,20 @@ status_t LPAPlayer::start(bool sourceAlreadyStarted) {
     success = format->findInt32(kKeySampleRate, &mSampleRate);
     CHECK(success);
 
-    success = format->findInt32(kKeyChannelCount, &mNumInputChannels);
+    success = format->findInt32(kKeyChannelCount, &numChannels);
     CHECK(success);
 
-    // Always produce stereo output
-    mNumOutputChannels = 2;
-
     if(!format->findInt32(kKeyChannelMask, &mChannelMask)) {
         // log only when there's a risk of ambiguity of channel mask selection
-        ALOGI_IF(mNumInputChannels > 2,
-                "source format didn't specify channel mask, using (%d) channel order", mNumInputChannels);
+        ALOGI_IF(numChannels > 2,
+                "source format didn't specify channel mask, using (%d) channel order", numChannels);
         mChannelMask = CHANNEL_MASK_USE_CHANNEL_ORDER;
     }
     audio_output_flags_t flags = (audio_output_flags_t) (AUDIO_OUTPUT_FLAG_LPA |
                                                          AUDIO_OUTPUT_FLAG_DIRECT);
-    ALOGV("mAudiosink->open() mSampleRate %d, numOutputChannels %d, mChannelMask %d, flags %d",mSampleRate,
-          mNumOutputChannels, mChannelMask, flags);
+    ALOGV("mAudiosink->open() mSampleRate %d, numChannels %d, mChannelMask %d, flags %d",mSampleRate, numChannels, mChannelMask, flags);
     err = mAudioSink->open(
-        mSampleRate, mNumOutputChannels, mChannelMask, AUDIO_FORMAT_PCM_16_BIT,
+        mSampleRate, numChannels, mChannelMask, AUDIO_FORMAT_PCM_16_BIT,
         DEFAULT_AUDIOSINK_BUFFERCOUNT,
         &LPAPlayer::AudioSinkCallback,
         this,
@@ -377,7 +372,7 @@ void LPAPlayer::resume() {
             audio_output_flags_t flags = (audio_output_flags_t) (AUDIO_OUTPUT_FLAG_LPA |
                                                                 AUDIO_OUTPUT_FLAG_DIRECT);
             status_t err = mAudioSink->open(
-                mSampleRate, mNumOutputChannels, mChannelMask, AUDIO_FORMAT_PCM_16_BIT,
+                mSampleRate, numChannels, mChannelMask, AUDIO_FORMAT_PCM_16_BIT,
                 DEFAULT_AUDIOSINK_BUFFERCOUNT,
                 &LPAPlayer::AudioSinkCallback,
                 this,
@@ -496,12 +491,6 @@ void LPAPlayer::decoderThreadEntry() {
     }
     void* local_buf = malloc(MEM_BUFFER_SIZE);
     int bytesWritten = 0;
-
-    if (!local_buf) {
-      ALOGE("Failed to allocate temporary buffer for decoderThread");
-      return;
-    }
-
     while (!killDecoderThread) {
 
         if (mReachedEOS || mPaused || !mIsAudioRouted) {
@@ -511,27 +500,16 @@ void LPAPlayer::decoderThreadEntry() {
             continue;
         }
 
-        if (mIsA2DPEnabled) {
-          //nothing to do
-          continue;
-        }
-
-        ALOGV("FillBuffer: MemBuffer size %d", MEM_BUFFER_SIZE);
-        ALOGV("Fillbuffer started");
-        if (mNumInputChannels == 1) {
-            bytesWritten = fillBuffer(local_buf, MEM_BUFFER_SIZE/2);
-            CHECK(bytesWritten <= MEM_BUFFER_SIZE/2);
-
-            convertMonoToStereo((int16_t*)local_buf, bytesWritten);
-            bytesWritten *= 2;
-        } else {
+        if (!mIsA2DPEnabled) {
+            ALOGV("FillBuffer: MemBuffer size %d", MEM_BUFFER_SIZE);
+            ALOGV("Fillbuffer started");
+            //TODO: Add memset
             bytesWritten = fillBuffer(local_buf, MEM_BUFFER_SIZE);
-            CHECK(bytesWritten <= MEM_BUFFER_SIZE);
-        }
+            ALOGV("FillBuffer completed bytesToWrite %d", bytesWritten);
 
-        ALOGV("FillBuffer completed bytesToWrite %d", bytesWritten);
-        if(!killDecoderThread) {
-          mAudioSink->write(local_buf, bytesWritten);
+            if(!killDecoderThread) {
+                mAudioSink->write(local_buf, bytesWritten);
+            }
         }
     }
 
@@ -684,7 +662,7 @@ size_t LPAPlayer::fillBuffer(void *data, size_t size) {
         size_t copy = size_remaining;
         if (copy > mInputBuffer->range_length()) {
             copy = mInputBuffer->range_length();
-        } //is size_remaining < range_length impossible?
+        }
 
         memcpy((char *)data + size_done,
                (const char *)mInputBuffer->data() + mInputBuffer->range_offset(),
@@ -812,18 +790,4 @@ void LPAPlayer::onPauseTimeOut() {
 
 }
 
-//dup each mono frame
-void LPAPlayer::convertMonoToStereo(int16_t *data, size_t size)
-{
-    int i =0;
-    int16_t *start_pointer = data;
-    int monoFrameCount = (size) / (sizeof(int16_t));
-
-    for (i = monoFrameCount; i > 0 ; i--) {
-      int16_t temp_sample = *(start_pointer + i - 1);
-      *(start_pointer + (i*2) - 1) = temp_sample;
-      *(start_pointer + (i*2) - 2) = temp_sample;
-    }
-}
-
 } //namespace android