Merge "Remove aliasing" (2a67e1a6) · Commits · e / os / android_frameworks_base

services/audioflinger/AudioResamplerSinc.cpp

+11 −12

Original line number	Diff line number	Diff line
		@@ -199,33 +199,32 @@ void AudioResamplerSinc::resample(int32_t* out, size_t outFrameCount,
		size_t outputSampleCount = outFrameCount * 2;
		size_t inFrameCount = (outFrameCount*mInSampleRate)/mSampleRate;

		AudioBufferProvider::Buffer& buffer(mBuffer);
		while (outputIndex < outputSampleCount) {
		// buffer is empty, fetch a new one
		while (buffer.frameCount == 0) {
		buffer.frameCount = inFrameCount;
		provider->getNextBuffer(&buffer);
		if (buffer.raw == NULL) {
		while (mBuffer.frameCount == 0) {
		mBuffer.frameCount = inFrameCount;
		provider->getNextBuffer(&mBuffer);
		if (mBuffer.raw == NULL) {
		goto resample_exit;
		}
		const uint32_t phaseIndex = phaseFraction >> kNumPhaseBits;
		if (phaseIndex == 1) {
		// read one frame
		read<CHANNELS>(impulse, phaseFraction, buffer.i16, inputIndex);
		read<CHANNELS>(impulse, phaseFraction, mBuffer.i16, inputIndex);
		} else if (phaseIndex == 2) {
		// read 2 frames
		read<CHANNELS>(impulse, phaseFraction, buffer.i16, inputIndex);
		read<CHANNELS>(impulse, phaseFraction, mBuffer.i16, inputIndex);
		inputIndex++;
		if (inputIndex >= mBuffer.frameCount) {
		inputIndex -= mBuffer.frameCount;
		provider->releaseBuffer(&buffer);
		provider->releaseBuffer(&mBuffer);
		} else {
		read<CHANNELS>(impulse, phaseFraction, buffer.i16, inputIndex);
		read<CHANNELS>(impulse, phaseFraction, mBuffer.i16, inputIndex);
		}
		}
		}
		int16_t *in = buffer.i16;
		const size_t frameCount = buffer.frameCount;
		int16_t *in = mBuffer.i16;
		const size_t frameCount = mBuffer.frameCount;

		// Always read-in the first samples from the input buffer
		int16_t* head = impulse + halfNumCoefs*CHANNELS;
		@@ -264,7 +263,7 @@ void AudioResamplerSinc::resample(int32_t* out, size_t outFrameCount,
		// if done with buffer, save samples
		if (inputIndex >= frameCount) {
		inputIndex -= frameCount;
		provider->releaseBuffer(&buffer);
		provider->releaseBuffer(&mBuffer);
		}
		}