diff options
Diffstat (limited to 'libSACdec/src/sac_dec_conceal.h')
| -rw-r--r-- | libSACdec/src/sac_dec_conceal.h | 187 |
1 files changed, 187 insertions, 0 deletions
diff --git a/libSACdec/src/sac_dec_conceal.h b/libSACdec/src/sac_dec_conceal.h new file mode 100644 index 0000000..27f5249 --- /dev/null +++ b/libSACdec/src/sac_dec_conceal.h @@ -0,0 +1,187 @@ +/* ----------------------------------------------------------------------------- +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 surround decoder library ************************* + + Author(s): Christian Ertel, Christian Griebel + + Description: SAC Dec error concealment + +*******************************************************************************/ + +#ifndef SAC_DEC_CONCEAL_H +#define SAC_DEC_CONCEAL_H + +#include "sac_dec_interface.h" + +/* Modules dynamic parameters: */ +typedef enum { + SAC_DEC_CONCEAL_METHOD = 0, + SAC_DEC_CONCEAL_NUM_KEEP_FRAMES, + SAC_DEC_CONCEAL_FADE_OUT_SLOPE_LENGTH, + SAC_DEC_CONCEAL_FADE_IN_SLOPE_LENGTH, + SAC_DEC_CONCEAL_NUM_RELEASE_FRAMES + +} SAC_DEC_CONCEAL_PARAM; + +/* - - - - - - - - - - - - - - - - - - - - - - - - - - */ +/* sac_dec_interface.h */ +/* - - - - - - - - - - - - - - - - - - - - - - - - - - */ +typedef enum { + SAC_DEC_CONCEAL_WITH_ZERO_VALUED_OUTPUT = 0, + SAC_DEC_CONCEAL_BY_FADING_PARAMETERS = 1 + +} SpatialDecConcealmentMethod; +/* - - - - - - - - - - - - - - - - - - - - - - - - - - */ + +/* Default dynamic parameter values: */ +#define MPEGS_CONCEAL_DEFAULT_METHOD SAC_DEC_CONCEAL_BY_FADING_PARAMETERS +#define MPEGS_CONCEAL_DEFAULT_NUM_KEEP_FRAMES (10) +#define MPEGS_CONCEAL_DEFAULT_FADE_OUT_SLOPE_LENGTH (5) +#define MPEGS_CONCEAL_DEFAULT_FADE_IN_SLOPE_LENGTH (5) +#define MPEGS_CONCEAL_DEFAULT_NUM_RELEASE_FRAMES (3) + +typedef enum { + SpatialDecConcealState_Init = 0, + SpatialDecConcealState_Ok, + SpatialDecConcealState_Keep, + SpatialDecConcealState_FadeToDefault, + SpatialDecConcealState_Default, + SpatialDecConcealState_FadeFromDefault + +} SpatialDecConcealmentState; + +typedef struct { + SpatialDecConcealmentMethod method; + + UINT numKeepFrames; + UINT numFadeOutFrames; + UINT numFadeInFrames; + UINT numReleaseFrames; + +} SpatialDecConcealmentParams; + +typedef struct { + SpatialDecConcealmentParams concealParams; /* User set params */ + SpatialDecConcealmentState + concealState; /* State of internal state machine (fade-in/out etc) */ + + UINT cntStateFrames; /* Counter for fade-in/out handling */ + UINT cntValidFrames; /* Counter for the number of consecutive good frames*/ + +} SpatialDecConcealmentInfo; + +/* Module reset flags */ +#define MPEGS_CONCEAL_RESET_STATE (0x01) +#define MPEGS_CONCEAL_RESET_PARAMETER (0x02) +#define MPEGS_CONCEAL_RESET_ALL (0xFF) + +void SpatialDecConcealment_Init(SpatialDecConcealmentInfo *info, + const UINT resetFlags); + +int SpatialDecConcealment_Apply(SpatialDecConcealmentInfo *info, + const SCHAR (*cmpIdxData)[MAX_PARAMETER_BANDS], + SCHAR **diffIdxData, SCHAR *idxPrev, + SCHAR *bsXXXDataMode, const int startBand, + const int stopBand, const SCHAR defaultValue, + const int paramType, const int numParamSets); + +void SpatialDecConcealment_UpdateState(SpatialDecConcealmentInfo *info, + const int frameOk); + +SACDEC_ERROR SpatialDecConcealment_SetParam(SpatialDecConcealmentInfo *info, + const SAC_DEC_CONCEAL_PARAM param, + const INT value); + +#endif /* SAC_DEC_CONCEAL_H */ |