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Commit 7752dcec authored by Daneswara Tatakuntla's avatar Daneswara Tatakuntla Committed by Arne Coucheron
Browse files

libstagefright: Enhance software AAC encoder to support stereo recording. 

Take channel count into consideration while encoding and reading PCM samples from AudioSource.

Change-Id: I3e92ade2958bd55cf5c9540edf2316c5e5f5d5ee
parent 5eede5f9

include/media/stagefright/AudioSource.h

+1 −1
Original line number Diff line number Diff line
@@ -50,7 +50,7 @@ protected: 


private:

    enum {

        kMaxBufferSize = 2048,

        kMaxBufferSize = 4096,



        // After the initial mute, we raise the volume linearly

        // over kAutoRampDurationUs.

media/libstagefright/AudioSource.cpp

+1 −1
Original line number Diff line number Diff line
@@ -48,7 +48,7 @@ AudioSource::AudioSource( 
    mRecord = new AudioRecord(

                inputSource, sampleRate, AudioSystem::PCM_16_BIT,

                channels > 1? AudioSystem::CHANNEL_IN_STEREO: AudioSystem::CHANNEL_IN_MONO,

                4 * kMaxBufferSize / sizeof(int16_t), /* Enable ping-pong buffers */

                4 * kMaxBufferSize / (sizeof(int16_t) * channels), /* Enable ping-pong buffers */

                flags);



    mInitCheck = mRecord->initCheck();

media/libstagefright/codecs/aacenc/AACEncoder.cpp

+5 −5
Original line number Diff line number Diff line
@@ -138,7 +138,7 @@ status_t AACEncoder::start(MetaData *params) { 
    }



    mBufferGroup = new MediaBufferGroup;

    mBufferGroup->add_buffer(new MediaBuffer(2048));

    mBufferGroup->add_buffer(new MediaBuffer(4096));



    CHECK_EQ(OK, initCheck());
@@ -236,7 +236,7 @@ status_t AACEncoder::read( 
                break;

            }



            size_t align = mInputBuffer->range_length() % sizeof(int16_t);

            size_t align = mInputBuffer->range_length() % (sizeof(int16_t) * mChannels);

            CHECK_EQ(align, 0);



            int64_t timeUs;
@@ -251,7 +251,7 @@ status_t AACEncoder::read( 
            readFromSource = false;

        }

        size_t copy =

            (kNumSamplesPerFrame - mNumInputSamples) * sizeof(int16_t);

            (kNumSamplesPerFrame - mNumInputSamples) * sizeof(int16_t) * mChannels;



        if (copy > mInputBuffer->range_length()) {

            copy = mInputBuffer->range_length();
@@ -270,7 +270,7 @@ status_t AACEncoder::read( 
            mInputBuffer->release();

            mInputBuffer = NULL;

        }

        mNumInputSamples += copy / sizeof(int16_t);

        mNumInputSamples += copy / (sizeof(int16_t) * mChannels);

        if (mNumInputSamples >= kNumSamplesPerFrame) {

            mNumInputSamples %= kNumSamplesPerFrame;

            break;
@@ -280,7 +280,7 @@ status_t AACEncoder::read( 
    VO_CODECBUFFER inputData;

    memset(&inputData, 0, sizeof(inputData));

    inputData.Buffer = (unsigned char*) mInputFrame;

    inputData.Length = kNumSamplesPerFrame * sizeof(int16_t);

    inputData.Length = kNumSamplesPerFrame * sizeof(int16_t) * mChannels;

    CHECK(VO_ERR_NONE == mApiHandle->SetInputData(mEncoderHandle,&inputData));



    VO_CODECBUFFER outputData;

media/libstagefright/include/AACEncoder.h

+1 −1
Original line number Diff line number Diff line
@@ -60,7 +60,7 @@ class AACEncoder: public MediaSource { 
            kNumSamplesPerFrame = 1024,

        };



        int16_t           mInputFrame[kNumSamplesPerFrame];

        int16_t           mInputFrame[kNumSamplesPerFrame * 2];



        uint8_t           mAudioSpecificConfigData[2]; // auido specific data

        void             *mEncoderHandle;