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Diffstat (limited to 'services/audioflinger/AudioResamplerQTI.cpp')
-rw-r--r-- | services/audioflinger/AudioResamplerQTI.cpp | 173 |
1 files changed, 173 insertions, 0 deletions
diff --git a/services/audioflinger/AudioResamplerQTI.cpp b/services/audioflinger/AudioResamplerQTI.cpp new file mode 100644 index 0000000..0d57e09 --- /dev/null +++ b/services/audioflinger/AudioResamplerQTI.cpp @@ -0,0 +1,173 @@ +/* + * Copyright (C) 2014, The Linux Foundation. All rights reserved. + * Not a Contribution. + * Copyright (C) 2007 The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#include "AudioResamplerQTI.h" +#include "QCT_Resampler.h" +#include <sys/time.h> +#include <audio_utils/primitives.h> + +namespace android { +AudioResamplerQTI::AudioResamplerQTI(int format, + int inChannelCount, int32_t sampleRate) + :AudioResampler(inChannelCount, sampleRate, QTI_QUALITY), + mOutFrameCount(0), mTmpBuf(0), mResamplerOutBuf(0), mFrameIndex(0) +{ + stateSize = QCT_Resampler::MemAlloc(format, inChannelCount, sampleRate, sampleRate); + mState = new int16_t[stateSize]; + mVolume[0] = mVolume[1] = 0; + mBuffer.frameCount = 0; +} + +AudioResamplerQTI::~AudioResamplerQTI() +{ + if (mState) { + delete [] mState; + } + if (mTmpBuf) { + delete [] mTmpBuf; + } + if(mResamplerOutBuf) { + delete [] mResamplerOutBuf; + } +} + +size_t AudioResamplerQTI::resample(int32_t* out, size_t outFrameCount, + AudioBufferProvider* provider) +{ + int16_t vl = mVolume[0]; + int16_t vr = mVolume[1]; + int32_t *pBuf; + + int64_t tempL, tempR; + size_t inFrameRequest; + size_t inFrameCount = getNumInSample(outFrameCount); + size_t index = 0; + size_t frameIndex = mFrameIndex; + size_t out_count = outFrameCount * 2; + float *fout = reinterpret_cast<float *>(out); + + if (mChannelCount == 1) { + inFrameRequest = inFrameCount; + } else { + inFrameRequest = inFrameCount * 2; + } + + if (mOutFrameCount < outFrameCount) { + mOutFrameCount = outFrameCount; + if (mTmpBuf) { + delete [] mTmpBuf; + } + if(mResamplerOutBuf) { + delete [] mResamplerOutBuf; + } + mTmpBuf = new int32_t[inFrameRequest + 16]; + mResamplerOutBuf = new int32_t[out_count]; + } + + if (mChannelCount == 1) { + // buffer is empty, fetch a new one + while (index < inFrameCount) { + if (!mBuffer.frameCount) { + mBuffer.frameCount = inFrameCount; + provider->getNextBuffer(&mBuffer); + frameIndex = 0; + } + + if (mBuffer.raw == NULL) { + while (index < inFrameCount) { + mTmpBuf[index++] = 0; + } + QCT_Resampler::Resample90dB(mState, mTmpBuf, mResamplerOutBuf, inFrameCount, outFrameCount); + goto resample_exit; + } + + mTmpBuf[index++] = clampq4_27_from_float(*((float *)mBuffer.raw + frameIndex++)); + + if (frameIndex >= mBuffer.frameCount) { + provider->releaseBuffer(&mBuffer); + } + } + + QCT_Resampler::Resample90dB(mState, mTmpBuf, mResamplerOutBuf, inFrameCount, outFrameCount); + } else { + pBuf = &mTmpBuf[inFrameCount]; + // buffer is empty, fetch a new one + while (index < inFrameCount) { + if (!mBuffer.frameCount) { + mBuffer.frameCount = inFrameCount; + provider->getNextBuffer(&mBuffer); + frameIndex = 0; + } + if (mBuffer.raw == NULL) { + while (index < inFrameCount) { + mTmpBuf[index] = 0; + pBuf[index++] = 0; + } + QCT_Resampler::Resample90dB(mState, mTmpBuf, mResamplerOutBuf, inFrameCount, outFrameCount); + goto resample_exit; + } + + mTmpBuf[index] = clampq4_27_from_float(*((float *)mBuffer.raw + frameIndex++)); + pBuf[index++] = clampq4_27_from_float(*((float *)mBuffer.raw + frameIndex++)); + if (frameIndex >= mBuffer.frameCount * 2) { + provider->releaseBuffer(&mBuffer); + } + } + + QCT_Resampler::Resample90dB(mState, mTmpBuf, mResamplerOutBuf, inFrameCount, outFrameCount); + } + +resample_exit: + for (int i = 0; i < out_count; i += 2) { + // Multiplying q4.27 data with u4.12 gain could result in 39 fractional bit data(27+12) + // To get back the 27 fractional bit format output data, do right shift by 12 + tempL = (int64_t)mResamplerOutBuf[i] * vl; + tempR = (int64_t)mResamplerOutBuf[i+1] * vr; + fout[i] += float_from_q4_27((int32_t)(tempL>>12)); + fout[i+1] += float_from_q4_27((int32_t)(tempR>>12)); + } + + mFrameIndex = frameIndex; + return index; +} + +void AudioResamplerQTI::setSampleRate(int32_t inSampleRate) +{ + if (mInSampleRate != inSampleRate) { + mInSampleRate = inSampleRate; + init(); + } +} + +void AudioResamplerQTI::init() +{ + QCT_Resampler::Init(mState, mChannelCount, mInSampleRate, mSampleRate, 1/*32bit in*/); +} + +size_t AudioResamplerQTI::getNumInSample(size_t outFrameCount) +{ + size_t size = (size_t)QCT_Resampler::GetNumInSamp(mState, outFrameCount); + return size; +} + +void AudioResamplerQTI::reset() +{ + AudioResampler::reset(); +} + +}; // namespace android |