diff options
Diffstat (limited to 'media/libstagefright/codecs/aacdec/DrcPresModeWrap.cpp')
| -rw-r--r-- | media/libstagefright/codecs/aacdec/DrcPresModeWrap.cpp | 372 |
1 files changed, 372 insertions, 0 deletions
diff --git a/media/libstagefright/codecs/aacdec/DrcPresModeWrap.cpp b/media/libstagefright/codecs/aacdec/DrcPresModeWrap.cpp new file mode 100644 index 0000000..129ad65 --- /dev/null +++ b/media/libstagefright/codecs/aacdec/DrcPresModeWrap.cpp @@ -0,0 +1,372 @@ +/* + * Copyright (C) 2014 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 "DrcPresModeWrap.h" + +#include <assert.h> + +#define LOG_TAG "SoftAAC2_DrcWrapper" +//#define LOG_NDEBUG 0 +#include <utils/Log.h> + +//#define DRC_PRES_MODE_WRAP_DEBUG + +#define GPM_ENCODER_TARGET_LEVEL 64 +#define MAX_TARGET_LEVEL 64 + +CDrcPresModeWrapper::CDrcPresModeWrapper() +{ + mDataUpdate = true; + + /* Data from streamInfo. */ + /* Initialized to the same values as in the aac decoder */ + mStreamPRL = -1; + mStreamDRCPresMode = -1; + mStreamNrAACChan = 0; + mStreamNrOutChan = 0; + + /* Desired values (set by user). */ + /* Initialized to the same values as in the aac decoder */ + mDesTarget = -1; + mDesAttFactor = 0; + mDesBoostFactor = 0; + mDesHeavy = 0; + + mEncoderTarget = -1; + + /* Values from last time. */ + /* Initialized to the same values as the desired values */ + mLastTarget = -1; + mLastAttFactor = 0; + mLastBoostFactor = 0; + mLastHeavy = 0; +} + +CDrcPresModeWrapper::~CDrcPresModeWrapper() +{ +} + +void +CDrcPresModeWrapper::setDecoderHandle(const HANDLE_AACDECODER handle) +{ + mHandleDecoder = handle; +} + +void +CDrcPresModeWrapper::submitStreamData(CStreamInfo* pStreamInfo) +{ + assert(pStreamInfo); + + if (mStreamPRL != pStreamInfo->drcProgRefLev) { + mStreamPRL = pStreamInfo->drcProgRefLev; + mDataUpdate = true; +#ifdef DRC_PRES_MODE_WRAP_DEBUG + ALOGV("DRC presentation mode wrapper: drcProgRefLev is %d\n", mStreamPRL); +#endif + } + + if (mStreamDRCPresMode != pStreamInfo->drcPresMode) { + mStreamDRCPresMode = pStreamInfo->drcPresMode; + mDataUpdate = true; +#ifdef DRC_PRES_MODE_WRAP_DEBUG + ALOGV("DRC presentation mode wrapper: drcPresMode is %d\n", mStreamDRCPresMode); +#endif + } + + if (mStreamNrAACChan != pStreamInfo->aacNumChannels) { + mStreamNrAACChan = pStreamInfo->aacNumChannels; + mDataUpdate = true; +#ifdef DRC_PRES_MODE_WRAP_DEBUG + ALOGV("DRC presentation mode wrapper: aacNumChannels is %d\n", mStreamNrAACChan); +#endif + } + + if (mStreamNrOutChan != pStreamInfo->numChannels) { + mStreamNrOutChan = pStreamInfo->numChannels; + mDataUpdate = true; +#ifdef DRC_PRES_MODE_WRAP_DEBUG + ALOGV("DRC presentation mode wrapper: numChannels is %d\n", mStreamNrOutChan); +#endif + } + + + + if (mStreamNrOutChan<mStreamNrAACChan) { + mIsDownmix = true; + } else { + mIsDownmix = false; + } + + if (mIsDownmix && (mStreamNrOutChan == 1)) { + mIsMonoDownmix = true; + } else { + mIsMonoDownmix = false; + } + + if (mIsDownmix && mStreamNrOutChan == 2){ + mIsStereoDownmix = true; + } else { + mIsStereoDownmix = false; + } + +} + +void +CDrcPresModeWrapper::setParam(const DRC_PRES_MODE_WRAP_PARAM param, const int value) +{ + switch (param) { + case DRC_PRES_MODE_WRAP_DESIRED_TARGET: + mDesTarget = value; + break; + case DRC_PRES_MODE_WRAP_DESIRED_ATT_FACTOR: + mDesAttFactor = value; + break; + case DRC_PRES_MODE_WRAP_DESIRED_BOOST_FACTOR: + mDesBoostFactor = value; + break; + case DRC_PRES_MODE_WRAP_DESIRED_HEAVY: + mDesHeavy = value; + break; + case DRC_PRES_MODE_WRAP_ENCODER_TARGET: + mEncoderTarget = value; + break; + default: + break; + } + mDataUpdate = true; +} + +void +CDrcPresModeWrapper::update() +{ + // Get Data from Decoder + int progRefLevel = mStreamPRL; + int drcPresMode = mStreamDRCPresMode; + + // by default, do as desired + int newTarget = mDesTarget; + int newAttFactor = mDesAttFactor; + int newBoostFactor = mDesBoostFactor; + int newHeavy = mDesHeavy; + + if (mDataUpdate) { + // sanity check + if (mDesTarget < MAX_TARGET_LEVEL){ + mDesTarget = MAX_TARGET_LEVEL; // limit target level to -16 dB or below + newTarget = MAX_TARGET_LEVEL; + } + + if (mEncoderTarget != -1) { + if (mDesTarget<124) { // if target level > -31 dB + if ((mIsStereoDownmix == false) && (mIsMonoDownmix == false)) { + // no stereo or mono downmixing, calculated scaling of light DRC + /* use as little compression as possible */ + newAttFactor = 0; + newBoostFactor = 0; + if (mDesTarget<progRefLevel) { // if target level > PRL + if (mEncoderTarget < mDesTarget) { // if mEncoderTarget > target level + // mEncoderTarget > target level > PRL + int calcFactor; + float calcFactor_norm; + // 0.0f < calcFactor_norm < 1.0f + calcFactor_norm = (float)(mDesTarget - progRefLevel) / + (float)(mEncoderTarget - progRefLevel); + calcFactor = (int)(calcFactor_norm*127.0f); // 0 <= calcFactor < 127 + // calcFactor is the lower limit + newAttFactor = (calcFactor>newAttFactor) ? calcFactor : newAttFactor; + // new AttFactor will be always = calcFactor, as it is set to 0 before. + newBoostFactor = newAttFactor; + } else { + /* target level > mEncoderTarget > PRL */ + // newTDLimiterEnable = 1; + // the time domain limiter must always be active in this case. + // It is assumed that the framework activates it by default + newAttFactor = 127; + newBoostFactor = 127; + } + } else { // target level <= PRL + // no restrictions required + // newAttFactor = newAttFactor; + } + } else { // downmixing + // if target level > -23 dB or mono downmix + if ( (mDesTarget<92) || mIsMonoDownmix ) { + newHeavy = 1; + } else { + // we perform a downmix, so, we need at least full light DRC + newAttFactor = 127; + } + } + } else { // target level <= -31 dB + // playback -31 dB: light DRC only needed if we perform downmixing + if (mIsDownmix) { // we do downmixing + newAttFactor = 127; + } + } + } + else { // handle other used encoder target levels + + // Sanity check: DRC presentation mode is only specified for max. 5.1 channels + if (mStreamNrAACChan > 6) { + drcPresMode = 0; + } + + switch (drcPresMode) { + case 0: + default: // presentation mode not indicated + { + + if (mDesTarget<124) { // if target level > -31 dB + // no stereo or mono downmixing + if ((mIsStereoDownmix == false) && (mIsMonoDownmix == false)) { + if (mDesTarget<progRefLevel) { // if target level > PRL + // newTDLimiterEnable = 1; + // the time domain limiter must always be active in this case. + // It is assumed that the framework activates it by default + newAttFactor = 127; // at least, use light compression + } else { // target level <= PRL + // no restrictions required + // newAttFactor = newAttFactor; + } + } else { // downmixing + // newTDLimiterEnable = 1; + // the time domain limiter must always be active in this case. + // It is assumed that the framework activates it by default + + // if target level > -23 dB or mono downmix + if ( (mDesTarget < 92) || mIsMonoDownmix ) { + newHeavy = 1; + } else{ + // we perform a downmix, so, we need at least full light DRC + newAttFactor = 127; + } + } + } else { // target level <= -31 dB + if (mIsDownmix) { // we do downmixing. + // newTDLimiterEnable = 1; + // the time domain limiter must always be active in this case. + // It is assumed that the framework activates it by default + newAttFactor = 127; + } + } + } + break; + + // Presentation mode 1 and 2 according to ETSI TS 101 154: + // Digital Video Broadcasting (DVB); Specification for the use of Video and Audio Coding + // in Broadcasting Applications based on the MPEG-2 Transport Stream, + // section C.5.4., "Decoding", and Table C.33 + // ISO DRC -> newHeavy = 0 (Use light compression, MPEG-style) + // Compression_value -> newHeavy = 1 (Use heavy compression, DVB-style) + // scaling restricted -> newAttFactor = 127 + + case 1: // presentation mode 1, Light:-31/Heavy:-23 + { + if (mDesTarget < 124) { // if target level > -31 dB + // playback up to -23 dB + newHeavy = 1; + } else { // target level <= -31 dB + // playback -31 dB + if (mIsDownmix) { // we do downmixing. + newAttFactor = 127; + } + } + } + break; + + case 2: // presentation mode 2, Light:-23/Heavy:-23 + { + if (mDesTarget < 124) { // if target level > -31 dB + // playback up to -23 dB + if (mIsMonoDownmix) { // if mono downmix + newHeavy = 1; + } else { + newHeavy = 0; + newAttFactor = 127; + } + } else { // target level <= -31 dB + // playback -31 dB + newHeavy = 0; + if (mIsDownmix) { // we do downmixing. + newAttFactor = 127; + } + } + } + break; + + } // switch() + } // if (mEncoderTarget == GPM_ENCODER_TARGET_LEVEL) + + // sanity again + if (newHeavy == 1) { + newBoostFactor=127; // not really needed as the same would be done by the decoder anyway + newAttFactor = 127; + } + + // update the decoder + if (newTarget != mLastTarget) { + aacDecoder_SetParam(mHandleDecoder, AAC_DRC_REFERENCE_LEVEL, newTarget); + mLastTarget = newTarget; +#ifdef DRC_PRES_MODE_WRAP_DEBUG + if (newTarget != mDesTarget) + ALOGV("DRC presentation mode wrapper: forced target level to %d (from %d)\n", newTarget, mDesTarget); + else + ALOGV("DRC presentation mode wrapper: set target level to %d\n", newTarget); +#endif + } + + if (newAttFactor != mLastAttFactor) { + aacDecoder_SetParam(mHandleDecoder, AAC_DRC_ATTENUATION_FACTOR, newAttFactor); + mLastAttFactor = newAttFactor; +#ifdef DRC_PRES_MODE_WRAP_DEBUG + if (newAttFactor != mDesAttFactor) + ALOGV("DRC presentation mode wrapper: forced attenuation factor to %d (from %d)\n", newAttFactor, mDesAttFactor); + else + ALOGV("DRC presentation mode wrapper: set attenuation factor to %d\n", newAttFactor); +#endif + } + + if (newBoostFactor != mLastBoostFactor) { + aacDecoder_SetParam(mHandleDecoder, AAC_DRC_BOOST_FACTOR, newBoostFactor); + mLastBoostFactor = newBoostFactor; +#ifdef DRC_PRES_MODE_WRAP_DEBUG + if (newBoostFactor != mDesBoostFactor) + ALOGV("DRC presentation mode wrapper: forced boost factor to %d (from %d)\n", + newBoostFactor, mDesBoostFactor); + else + ALOGV("DRC presentation mode wrapper: set boost factor to %d\n", newBoostFactor); +#endif + } + + if (newHeavy != mLastHeavy) { + aacDecoder_SetParam(mHandleDecoder, AAC_DRC_HEAVY_COMPRESSION, newHeavy); + mLastHeavy = newHeavy; +#ifdef DRC_PRES_MODE_WRAP_DEBUG + if (newHeavy != mDesHeavy) + ALOGV("DRC presentation mode wrapper: forced heavy compression to %d (from %d)\n", + newHeavy, mDesHeavy); + else + ALOGV("DRC presentation mode wrapper: set heavy compression to %d\n", newHeavy); +#endif + } + +#ifdef DRC_PRES_MODE_WRAP_DEBUG + ALOGV("DRC config: tgt_lev: %3d, cut: %3d, boost: %3d, heavy: %d\n", newTarget, + newAttFactor, newBoostFactor, newHeavy); +#endif + mDataUpdate = false; + + } // if (mDataUpdate) +} |