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Commit c4ae375b authored by Steve Kondik's avatar Steve Kondik Committed by Gerrit Code Review
Browse files

Merge "Compression accuracy improvement" into gingerbread

parents edbfe9b9 64ad1a46

media/libeffects/cyanogen-dsp/EffectCompression.cpp

+9 −9
Original line number Diff line number Diff line
@@ -35,7 +35,7 @@ static int32_t max(int32_t a, int32_t b) 
EffectCompression::EffectCompression()

    : mCompressionRatio(2.0)

{

    for (int i = 0; i < 2; i ++) {

    for (int32_t i = 0; i < 2; i ++) {

	mCurrentLevel[i] = 0;

	mUserVolumes[i] = 1 << 24;

    }
@@ -51,7 +51,8 @@ int32_t EffectCompression::command(uint32_t cmdCode, uint32_t cmdSize, void* pCm 
	    return 0;

	}



	mWeighter.setBandPass(1700, mSamplingRate, sqrtf(2)/2);

	mWeighter[0].setBandPass(1700, mSamplingRate, sqrtf(2)/2);

	mWeighter[1].setBandPass(1700, mSamplingRate, sqrtf(2)/2);



	*replyData = 0;

	return 0;
@@ -79,20 +80,20 @@ int32_t EffectCompression::command(uint32_t cmdCode, uint32_t cmdSize, void* pCm 
	LOGI("Setting volumes");



	if (pReplyData != NULL) {

	    int32_t *userVols = (int *) pCmdData;

	    int32_t *userVols = (int32_t *) pCmdData;

	    for (uint32_t i = 0; i < cmdSize / 4; i ++) {

                LOGI("user volume on channel %d: %d", i, userVols[i]);

		mUserVolumes[i] = userVols[i];

	    }



	    int32_t *myVols = (int *) pReplyData;

	    int32_t *myVols = (int32_t *) pReplyData;

	    for (uint32_t i = 0; i < *replySize / 4; i ++) {

                LOGI("Returning unity for our pre-requested volume on channel %d", i);

		myVols[i] = 1 << 24; /* Unity gain */

	    }

        } else {

	    /* We don't control volume. */

	    for (int i = 0; i < 2; i ++) {

	    for (int32_t i = 0; i < 2; i ++) {

		mUserVolumes[i] = 1 << 24;

	    }

	}
@@ -104,14 +105,13 @@ int32_t EffectCompression::command(uint32_t cmdCode, uint32_t cmdSize, void* pCm 
}



/* Return fixed point 16.48 */

uint64_t EffectCompression::estimateOneChannelLevel(audio_buffer_t *in, int32_t interleave, int32_t offset)

uint64_t EffectCompression::estimateOneChannelLevel(audio_buffer_t *in, int32_t interleave, int32_t offset, Biquad& weighter)

{

    mWeighter.reset();

    uint64_t power = 0;

    for (uint32_t i = 0; i < in->frameCount; i ++) {

	int32_t tmp = read(in, offset);

	offset += interleave;

        int64_t out = mWeighter.process(tmp);

        int64_t out = weighter.process(tmp);

	/* 2^24 * 2^24 = 48 */

        power += out * out;

    }
@@ -124,7 +124,7 @@ int32_t EffectCompression::process_effect(audio_buffer_t *in, audio_buffer_t *ou 
    /* Analyze both channels separately, pick the maximum power measured. */

    uint64_t maximumPowerSquared = 0;

    for (uint32_t i = 0; i < mChannels; i ++) {

        uint64_t candidatePowerSquared = estimateOneChannelLevel(in, mChannels, i);

        uint64_t candidatePowerSquared = estimateOneChannelLevel(in, mChannels, i, mWeighter[i]);

        if (candidatePowerSquared > maximumPowerSquared) {

            maximumPowerSquared = candidatePowerSquared;

        }

media/libeffects/cyanogen-dsp/EffectCompression.h

+2 −2
Original line number Diff line number Diff line
@@ -9,9 +9,9 @@ class EffectCompression : public Effect { 
    float mCompressionRatio;

    

    int32_t mCurrentLevel[2];

    Biquad mWeighter;

    Biquad mWeighter[2];



    uint64_t estimateOneChannelLevel(audio_buffer_t *in, int interleave, int offset);

    uint64_t estimateOneChannelLevel(audio_buffer_t *in, int32_t interleave, int32_t offset, Biquad& weighter);



    public:

    EffectCompression();