diff options
Diffstat (limited to 'libDRCdec/src/drcDec_gainDecoder.h')
| -rw-r--r-- | libDRCdec/src/drcDec_gainDecoder.h | 264 |
1 files changed, 264 insertions, 0 deletions
diff --git a/libDRCdec/src/drcDec_gainDecoder.h b/libDRCdec/src/drcDec_gainDecoder.h new file mode 100644 index 0000000..2f4df4c --- /dev/null +++ b/libDRCdec/src/drcDec_gainDecoder.h @@ -0,0 +1,264 @@ +/* ----------------------------------------------------------------------------- +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: + +*******************************************************************************/ + +#ifndef DRCDEC_GAINDECODER_H +#define DRCDEC_GAINDECODER_H + +#include "drcDecoder.h" + +/* Definitions common to gainDecoder submodule */ + +#define NUM_LNB_FRAMES \ + 5 /* previous frame + this frame + one frame for DM_REGULAR_DELAY + (maximum \ + delaySamples)/frameSize */ + +/* QMF64 */ +#define SUBBAND_NUM_BANDS_QMF64 64 +#define SUBBAND_DOWNSAMPLING_FACTOR_QMF64 64 +#define SUBBAND_ANALYSIS_DELAY_QMF64 320 + +/* QMF71 (according to ISO/IEC 23003-1:2007) */ +#define SUBBAND_NUM_BANDS_QMF71 71 +#define SUBBAND_DOWNSAMPLING_FACTOR_QMF71 64 +#define SUBBAND_ANALYSIS_DELAY_QMF71 320 + 384 + +/* STFT256 (according to ISO/IEC 23008-3:2015/AMD3) */ +#define SUBBAND_NUM_BANDS_STFT256 256 +#define SUBBAND_DOWNSAMPLING_FACTOR_STFT256 256 +#define SUBBAND_ANALYSIS_DELAY_STFT256 256 + +typedef enum { + GAIN_DEC_DRC1, + GAIN_DEC_DRC1_DRC2, + GAIN_DEC_DRC2, + GAIN_DEC_DRC3, + GAIN_DEC_DRC2_DRC3 +} GAIN_DEC_LOCATION; + +typedef struct { + FIXP_DBL gainLin; /* e = 7 */ + SHORT time; +} NODE_LIN; + +typedef struct { + GAIN_INTERPOLATION_TYPE gainInterpolationType; + int nNodes[NUM_LNB_FRAMES]; /* number of nodes, saturated to 16 */ + NODE_LIN linearNode[NUM_LNB_FRAMES][16]; +} LINEAR_NODE_BUFFER; + +typedef struct { + int lnbPointer; + LINEAR_NODE_BUFFER linearNodeBuffer[12]; + LINEAR_NODE_BUFFER dummyLnb; + FIXP_DBL channelGain[8][NUM_LNB_FRAMES]; /* e = 8 */ +} DRC_GAIN_BUFFERS; + +typedef struct { + int activeDrcOffset; + DRC_INSTRUCTIONS_UNI_DRC* pInst; + DRC_COEFFICIENTS_UNI_DRC* pCoef; + + DUCKING_MODIFICATION duckingModificationForChannelGroup[8]; + SCHAR channelGroupForChannel[8]; + + UCHAR bandCountForChannelGroup[8]; + UCHAR gainElementForGroup[8]; + UCHAR channelGroupIsParametricDrc[8]; + UCHAR gainElementCount; /* number of different DRC gains inluding all DRC + bands */ + int lnbIndexForChannel[8][NUM_LNB_FRAMES]; + int subbandGainsReady; +} ACTIVE_DRC; + +typedef struct { + int deltaTminDefault; + INT frameSize; + FIXP_DBL loudnessNormalisationGainDb; + DELAY_MODE delayMode; + + int nActiveDrcs; + ACTIVE_DRC activeDrc[MAX_ACTIVE_DRCS]; + int multiBandActiveDrcIndex; + int channelGainActiveDrcIndex; + FIXP_DBL channelGain[8]; /* e = 8 */ + + DRC_GAIN_BUFFERS drcGainBuffers; + FIXP_DBL subbandGains[12][4 * 1024 / 256]; + FIXP_DBL dummySubbandGains[4 * 1024 / 256]; + + int status; + int timeDomainSupported; + SUBBAND_DOMAIN_MODE subbandDomainSupported; +} DRC_GAIN_DECODER, *HANDLE_DRC_GAIN_DECODER; + +/* init functions */ +DRC_ERROR +drcDec_GainDecoder_Open(HANDLE_DRC_GAIN_DECODER* phGainDec); + +DRC_ERROR +drcDec_GainDecoder_Init(HANDLE_DRC_GAIN_DECODER hGainDec, const int frameSize, + const int sampleRate); + +DRC_ERROR +drcDec_GainDecoder_SetCodecDependentParameters( + HANDLE_DRC_GAIN_DECODER hGainDec, const DELAY_MODE delayMode, + const int timeDomainSupported, + const SUBBAND_DOMAIN_MODE subbandDomainSupported); + +DRC_ERROR +drcDec_GainDecoder_Config(HANDLE_DRC_GAIN_DECODER hGainDec, + HANDLE_UNI_DRC_CONFIG hUniDrcConfig, + const UCHAR numSelectedDrcSets, + const SCHAR* selectedDrcSetIds, + const UCHAR* selectedDownmixIds); + +/* close functions */ +DRC_ERROR +drcDec_GainDecoder_Close(HANDLE_DRC_GAIN_DECODER* phGainDec); + +/* process functions */ + +/* call drcDec_GainDecoder_Preprocess first */ +DRC_ERROR +drcDec_GainDecoder_Preprocess(HANDLE_DRC_GAIN_DECODER hGainDec, + HANDLE_UNI_DRC_GAIN hUniDrcGain, + const FIXP_DBL loudnessNormalizationGainDb, + const FIXP_SGL boost, const FIXP_SGL compress); + +/* Then call one of drcDec_GainDecoder_ProcessTimeDomain or + * drcDec_GainDecoder_ProcessSubbandDomain */ +DRC_ERROR +drcDec_GainDecoder_ProcessTimeDomain( + HANDLE_DRC_GAIN_DECODER hGainDec, const int delaySamples, + const GAIN_DEC_LOCATION drcLocation, const int channelOffset, + const int drcChannelOffset, const int numChannelsProcessed, + const int timeDataChannelOffset, FIXP_DBL* audioIOBuffer); + +DRC_ERROR +drcDec_GainDecoder_ProcessSubbandDomain( + HANDLE_DRC_GAIN_DECODER hGainDec, const int delaySamples, + GAIN_DEC_LOCATION drcLocation, const int channelOffset, + const int drcChannelOffset, const int numChannelsProcessed, + const int processSingleTimeslot, FIXP_DBL* audioIOBufferReal[], + FIXP_DBL* audioIOBufferImag[]); + +DRC_ERROR +drcDec_GainDecoder_Conceal(HANDLE_DRC_GAIN_DECODER hGainDec, + HANDLE_UNI_DRC_CONFIG hUniDrcConfig, + HANDLE_UNI_DRC_GAIN hUniDrcGain); + +DRC_ERROR +drcDec_GainDecoder_SetLoudnessNormalizationGainDb( + HANDLE_DRC_GAIN_DECODER hGainDec, FIXP_DBL loudnessNormalizationGainDb); + +int drcDec_GainDecoder_GetFrameSize(HANDLE_DRC_GAIN_DECODER hGainDec); + +int drcDec_GainDecoder_GetDeltaTminDefault(HANDLE_DRC_GAIN_DECODER hGainDec); + +void drcDec_GainDecoder_SetChannelGains(HANDLE_DRC_GAIN_DECODER hGainDec, + const int numChannels, + const int frameSize, + const FIXP_DBL* channelGainDb, + const int audioBufferChannelOffset, + FIXP_DBL* audioBuffer); + +#endif |