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Diffstat (limited to 'fdk-aac/libDRCdec/src/drcGainDec_init.cpp')
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1 files changed, 344 insertions, 0 deletions
diff --git a/fdk-aac/libDRCdec/src/drcGainDec_init.cpp b/fdk-aac/libDRCdec/src/drcGainDec_init.cpp new file mode 100644 index 0000000..38f3243 --- /dev/null +++ b/fdk-aac/libDRCdec/src/drcGainDec_init.cpp @@ -0,0 +1,344 @@ +/* ----------------------------------------------------------------------------- +Software License for The Fraunhofer FDK AAC Codec Library for Android + +© Copyright 1995 - 2018 Fraunhofer-Gesellschaft zur Förderung der angewandten +Forschung e.V. All rights reserved. + + 1. INTRODUCTION +The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software +that implements the MPEG Advanced Audio Coding ("AAC") encoding and decoding +scheme for digital audio. This FDK AAC Codec software is intended to be used on +a wide variety of Android devices. + +AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient +general perceptual audio codecs. AAC-ELD is considered the best-performing +full-bandwidth communications codec by independent studies and is widely +deployed. AAC has been standardized by ISO and IEC as part of the MPEG +specifications. + +Patent licenses for necessary patent claims for the FDK AAC Codec (including +those of Fraunhofer) may be obtained through Via Licensing +(www.vialicensing.com) or through the respective patent owners individually for +the purpose of encoding or decoding bit streams in products that are compliant +with the ISO/IEC MPEG audio standards. Please note that most manufacturers of +Android devices already license these patent claims through Via Licensing or +directly from the patent owners, and therefore FDK AAC Codec software may +already be covered under those patent licenses when it is used for those +licensed purposes only. + +Commercially-licensed AAC software libraries, including floating-point versions +with enhanced sound quality, are also available from Fraunhofer. Users are +encouraged to check the Fraunhofer website for additional applications +information and documentation. + +2. COPYRIGHT LICENSE + +Redistribution and use in source and binary forms, with or without modification, +are permitted without payment of copyright license fees provided that you +satisfy the following conditions: + +You must retain the complete text of this software license in redistributions of +the FDK AAC Codec or your modifications thereto in source code form. + +You must retain the complete text of this software license in the documentation +and/or other materials provided with redistributions of the FDK AAC Codec or +your modifications thereto in binary form. You must make available free of +charge copies of the complete source code of the FDK AAC Codec and your +modifications thereto to recipients of copies in binary form. + +The name of Fraunhofer may not be used to endorse or promote products derived +from this library without prior written permission. + +You may not charge copyright license fees for anyone to use, copy or distribute +the FDK AAC Codec software or your modifications thereto. + +Your modified versions of the FDK AAC Codec must carry prominent notices stating +that you changed the software and the date of any change. For modified versions +of the FDK AAC Codec, the term "Fraunhofer FDK AAC Codec Library for Android" +must be replaced by the term "Third-Party Modified Version of the Fraunhofer FDK +AAC Codec Library for Android." + +3. NO PATENT LICENSE + +NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without +limitation the patents of Fraunhofer, ARE GRANTED BY THIS SOFTWARE LICENSE. +Fraunhofer provides no warranty of patent non-infringement with respect to this +software. + +You may use this FDK AAC Codec software or modifications thereto only for +purposes that are authorized by appropriate patent licenses. + +4. DISCLAIMER + +This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright +holders and contributors "AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, +including but not limited to the implied warranties of merchantability and +fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR +CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary, +or consequential damages, including but not limited to procurement of substitute +goods or services; loss of use, data, or profits, or business interruption, +however caused and on any theory of liability, whether in contract, strict +liability, or tort (including negligence), arising in any way out of the use of +this software, even if advised of the possibility of such damage. + +5. CONTACT INFORMATION + +Fraunhofer Institute for Integrated Circuits IIS +Attention: Audio and Multimedia Departments - FDK AAC LL +Am Wolfsmantel 33 +91058 Erlangen, Germany + +www.iis.fraunhofer.de/amm +amm-info@iis.fraunhofer.de +----------------------------------------------------------------------------- */ + +/************************* MPEG-D DRC decoder library ************************** + + Author(s): + + Description: + +*******************************************************************************/ + +#include "drcDec_types.h" +#include "drcDec_tools.h" +#include "drcDec_gainDecoder.h" +#include "drcGainDec_init.h" + +static DRC_ERROR _generateDrcInstructionsDerivedData( + HANDLE_DRC_GAIN_DECODER hGainDec, HANDLE_UNI_DRC_CONFIG hUniDrcConfig, + DRC_INSTRUCTIONS_UNI_DRC* pInst, DRC_COEFFICIENTS_UNI_DRC* pCoef, + ACTIVE_DRC* pActiveDrc) { + DRC_ERROR err = DE_OK; + int g; + int gainElementCount = 0; + UCHAR nDrcChannelGroups = 0; + SCHAR gainSetIndexForChannelGroup[8]; + + err = deriveDrcChannelGroups( + pInst->drcSetEffect, pInst->drcChannelCount, pInst->gainSetIndex, + pInst->drcSetEffect & (EB_DUCK_OTHER | EB_DUCK_SELF) + ? pInst->duckingModificationForChannel + : NULL, + &nDrcChannelGroups, gainSetIndexForChannelGroup, + pActiveDrc->channelGroupForChannel, + pInst->drcSetEffect & (EB_DUCK_OTHER | EB_DUCK_SELF) + ? pActiveDrc->duckingModificationForChannelGroup + : NULL); + if (err) return (err); + + /* sanity check */ + if (nDrcChannelGroups != pInst->nDrcChannelGroups) return DE_NOT_OK; + for (g = 0; g < pInst->nDrcChannelGroups; g++) { + if (gainSetIndexForChannelGroup[g] != pInst->gainSetIndexForChannelGroup[g]) + return DE_NOT_OK; + } + + for (g = 0; g < pInst->nDrcChannelGroups; g++) { + int seq = pInst->gainSetIndexForChannelGroup[g]; + if (seq != -1 && (hUniDrcConfig->drcCoefficientsUniDrcCount == 0 || + seq >= pCoef->gainSetCount)) { + pActiveDrc->channelGroupIsParametricDrc[g] = 1; + } else { + pActiveDrc->channelGroupIsParametricDrc[g] = 0; + if (seq >= pCoef->gainSetCount) { + return DE_NOT_OK; + } + } + } + + /* gainElementCount */ + if (pInst->drcSetEffect & (EB_DUCK_OTHER | EB_DUCK_SELF)) { + for (g = 0; g < pInst->nDrcChannelGroups; g++) { + pActiveDrc->bandCountForChannelGroup[g] = 1; + } + pActiveDrc->gainElementCount = + pInst->nDrcChannelGroups; /* one gain element per channel group */ + } else { + for (g = 0; g < pInst->nDrcChannelGroups; g++) { + if (pActiveDrc->channelGroupIsParametricDrc[g]) { + gainElementCount++; + pActiveDrc->bandCountForChannelGroup[g] = 1; + } else { + int seq, bandCount; + seq = pInst->gainSetIndexForChannelGroup[g]; + bandCount = pCoef->gainSet[seq].bandCount; + pActiveDrc->bandCountForChannelGroup[g] = bandCount; + gainElementCount += bandCount; + } + } + pActiveDrc->gainElementCount = gainElementCount; + } + + /* prepare gainElementForGroup (cumulated sum of bandCountForChannelGroup) */ + pActiveDrc->gainElementForGroup[0] = 0; + for (g = 1; g < pInst->nDrcChannelGroups; g++) { + pActiveDrc->gainElementForGroup[g] = + pActiveDrc->gainElementForGroup[g - 1] + + pActiveDrc->bandCountForChannelGroup[g - 1]; /* index of first gain + sequence in channel + group */ + } + + return DE_OK; +} + +DRC_ERROR +initGainDec(HANDLE_DRC_GAIN_DECODER hGainDec, const int frameSize, + const int sampleRate) { + int i, j, k; + + if (frameSize < 1) { + return DE_NOT_OK; + } + + hGainDec->frameSize = frameSize; + + if (hGainDec->frameSize * 1000 < sampleRate) { + return DE_NOT_OK; + } + + hGainDec->deltaTminDefault = getDeltaTmin(sampleRate); + if (hGainDec->deltaTminDefault > hGainDec->frameSize) { + return DE_NOT_OK; + } + + for (i = 0; i < MAX_ACTIVE_DRCS; i++) { + for (j = 0; j < 8; j++) { + /* use startup node at the beginning */ + hGainDec->activeDrc[i].lnbIndexForChannel[j][0] = 0; + for (k = 1; k < NUM_LNB_FRAMES; k++) { + hGainDec->activeDrc[i].lnbIndexForChannel[j][k] = -1; + } + } + } + + for (j = 0; j < 8; j++) { + hGainDec->channelGain[j] = FL2FXCONST_DBL(1.0f / (float)(1 << 8)); + } + + for (i = 0; i < 4 * 1024 / 256; i++) { + hGainDec->dummySubbandGains[i] = FL2FXCONST_DBL(1.0f / (float)(1 << 7)); + } + + hGainDec->status = 0; /* startup */ + + return DE_OK; +} + +void initDrcGainBuffers(const int frameSize, DRC_GAIN_BUFFERS* drcGainBuffers) { + int i, c, j; + /* prepare 12 instances of node buffers */ + for (i = 0; i < 12; i++) { + for (j = 0; j < NUM_LNB_FRAMES; j++) { + drcGainBuffers->linearNodeBuffer[i].nNodes[j] = 1; + drcGainBuffers->linearNodeBuffer[i].linearNode[j][0].gainLin = + FL2FXCONST_DBL(1.0f / (float)(1 << 7)); + if (j == 0) { + drcGainBuffers->linearNodeBuffer[i].linearNode[j][0].time = + 0; /* initialize last node with startup node */ + } else { + drcGainBuffers->linearNodeBuffer[i].linearNode[j][0].time = + frameSize - 1; + } + } + } + + /* prepare dummyLnb, a linearNodeBuffer containing a constant gain of 0 dB, + * for the "no DRC processing" case */ + drcGainBuffers->dummyLnb.gainInterpolationType = GIT_LINEAR; + for (i = 0; i < NUM_LNB_FRAMES; i++) { + drcGainBuffers->dummyLnb.nNodes[i] = 1; + drcGainBuffers->dummyLnb.linearNode[i][0].gainLin = + FL2FXCONST_DBL(1.0f / (float)(1 << 7)); + drcGainBuffers->dummyLnb.linearNode[i][0].time = frameSize - 1; + } + + /* prepare channelGain delay line */ + for (c = 0; c < 8; c++) { + for (i = 0; i < NUM_LNB_FRAMES; i++) { + drcGainBuffers->channelGain[c][i] = + FL2FXCONST_DBL(1.0f / (float)(1 << 8)); + } + } + + drcGainBuffers->lnbPointer = 0; +} + +DRC_ERROR +initActiveDrc(HANDLE_DRC_GAIN_DECODER hGainDec, + HANDLE_UNI_DRC_CONFIG hUniDrcConfig, const int drcSetIdSelected, + const int downmixIdSelected) { + int g, isMultiband = 0; + DRC_ERROR err = DE_OK; + DRC_INSTRUCTIONS_UNI_DRC* pInst = NULL; + DRC_COEFFICIENTS_UNI_DRC* pCoef = NULL; + + pInst = selectDrcInstructions(hUniDrcConfig, drcSetIdSelected); + if (pInst == NULL) { + return DE_NOT_OK; + } + + if (pInst->drcSetId >= 0) { + pCoef = selectDrcCoefficients(hUniDrcConfig, pInst->drcLocation); + if (pCoef == NULL) { + return DE_NOT_OK; + } + + if (pCoef->drcFrameSizePresent) { + if (pCoef->drcFrameSize != hGainDec->frameSize) { + return DE_NOT_OK; + } + } + + err = _generateDrcInstructionsDerivedData( + hGainDec, hUniDrcConfig, pInst, pCoef, + &(hGainDec->activeDrc[hGainDec->nActiveDrcs])); + if (err) return err; + } + + hGainDec->activeDrc[hGainDec->nActiveDrcs].pInst = pInst; + hGainDec->activeDrc[hGainDec->nActiveDrcs].pCoef = pCoef; + + for (g = 0; g < pInst->nDrcChannelGroups; g++) { + if (hGainDec->activeDrc[hGainDec->nActiveDrcs].bandCountForChannelGroup[g] > + 1) { + if (hGainDec->multiBandActiveDrcIndex != -1) { + return DE_NOT_OK; + } + isMultiband = 1; + } + } + + if (isMultiband) { + /* Keep activeDrc index of multiband DRC set */ + hGainDec->multiBandActiveDrcIndex = hGainDec->nActiveDrcs; + } + + if ((hGainDec->channelGainActiveDrcIndex == -1) && + (downmixIdSelected == DOWNMIX_ID_BASE_LAYOUT) && + (hUniDrcConfig->drcInstructionsUniDrcCount > + 0)) { /* use this activeDrc to apply channelGains */ + hGainDec->channelGainActiveDrcIndex = hGainDec->nActiveDrcs; + } + + hGainDec->nActiveDrcs++; + if (hGainDec->nActiveDrcs > MAX_ACTIVE_DRCS) return DE_NOT_OK; + + return DE_OK; +} + +DRC_ERROR +initActiveDrcOffset(HANDLE_DRC_GAIN_DECODER hGainDec) { + int a, accGainElementCount; + + accGainElementCount = 0; + for (a = 0; a < hGainDec->nActiveDrcs; a++) { + hGainDec->activeDrc[a].activeDrcOffset = accGainElementCount; + accGainElementCount += hGainDec->activeDrc[a].gainElementCount; + } + + if (accGainElementCount > 12) return DE_NOT_OK; + + return DE_OK; +} |