diff options
Diffstat (limited to 'libSBRenc/src/bit_sbr.cpp')
| -rw-r--r-- | libSBRenc/src/bit_sbr.cpp | 1059 |
1 files changed, 1059 insertions, 0 deletions
diff --git a/libSBRenc/src/bit_sbr.cpp b/libSBRenc/src/bit_sbr.cpp new file mode 100644 index 0000000..734a8aa --- /dev/null +++ b/libSBRenc/src/bit_sbr.cpp @@ -0,0 +1,1059 @@ + +/* ----------------------------------------------------------------------------------------------------------- +Software License for The Fraunhofer FDK AAC Codec Library for Android + +© Copyright 1995 - 2012 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 +----------------------------------------------------------------------------------------------------------- */ + +/*! + \file + \brief SBR bit writing routines +*/ + + +#include "bit_sbr.h" + +#include "code_env.h" +#include "cmondata.h" +#include "sbr.h" + +#include "ps_main.h" + +typedef enum { + SBR_ID_SCE = 1, + SBR_ID_CPE +} SBR_ELEMENT_TYPE; + + +static INT encodeSbrData (HANDLE_SBR_ENV_DATA sbrEnvDataLeft, + HANDLE_SBR_ENV_DATA sbrEnvDataRight, + HANDLE_PARAMETRIC_STEREO hParametricStereo, + HANDLE_COMMON_DATA cmonData, + SBR_ELEMENT_TYPE sbrElem, + INT coupling, + UINT sbrSyntaxFlags); + +static INT encodeSbrHeader (HANDLE_SBR_HEADER_DATA sbrHeaderData, + HANDLE_SBR_BITSTREAM_DATA sbrBitstreamData, + HANDLE_COMMON_DATA cmonData); + + +static INT encodeSbrHeaderData (HANDLE_SBR_HEADER_DATA sbrHeaderData, + HANDLE_FDK_BITSTREAM hBitStream); + +static INT encodeSbrSingleChannelElement (HANDLE_SBR_ENV_DATA sbrEnvData, + HANDLE_FDK_BITSTREAM hBitStream + ,HANDLE_PARAMETRIC_STEREO hParametricStereo + ,UINT sbrSyntaxFlags + ); + + + +static INT encodeSbrChannelPairElement (HANDLE_SBR_ENV_DATA sbrEnvDataLeft, + HANDLE_SBR_ENV_DATA sbrEnvDataRight, + HANDLE_PARAMETRIC_STEREO hParametricStereo, + HANDLE_FDK_BITSTREAM hBitStream, + INT coupling); + + +static INT encodeSbrGrid (HANDLE_SBR_ENV_DATA sbrEnvData, + HANDLE_FDK_BITSTREAM hBitStream); + +static int encodeLowDelaySbrGrid ( HANDLE_SBR_ENV_DATA sbrEnvData, + HANDLE_FDK_BITSTREAM hBitStream, + int transmitFreqs); + +static INT encodeSbrDtdf (HANDLE_SBR_ENV_DATA sbrEnvData, + HANDLE_FDK_BITSTREAM hBitStream); + +static INT writeNoiseLevelData (HANDLE_SBR_ENV_DATA sbrEnvData, + HANDLE_FDK_BITSTREAM hBitStream, + INT coupling); + +static INT writeEnvelopeData (HANDLE_SBR_ENV_DATA sbrEnvData, + HANDLE_FDK_BITSTREAM hBitStream, + INT coupling); + +static INT writeSyntheticCodingData (HANDLE_SBR_ENV_DATA sbrEnvData, + HANDLE_FDK_BITSTREAM hBitStream); + + +static INT encodeExtendedData (HANDLE_PARAMETRIC_STEREO hParametricStereo, + HANDLE_FDK_BITSTREAM hBitStream); + + + +static INT getSbrExtendedDataSize (HANDLE_PARAMETRIC_STEREO hParametricStereo); + +/***************************************************************************** + + functionname: FDKsbrEnc_WriteEnvSingleChannelElement + description: writes pure SBR single channel data element + returns: number of bits written + input: + output: + +*****************************************************************************/ +INT +FDKsbrEnc_WriteEnvSingleChannelElement( + HANDLE_SBR_HEADER_DATA sbrHeaderData, + HANDLE_PARAMETRIC_STEREO hParametricStereo, + HANDLE_SBR_BITSTREAM_DATA sbrBitstreamData, + HANDLE_SBR_ENV_DATA sbrEnvData, + HANDLE_COMMON_DATA cmonData, + UINT sbrSyntaxFlags + ) + +{ + INT payloadBits = 0; + + cmonData->sbrHdrBits = 0; + cmonData->sbrDataBits = 0; + + /* write pure sbr data */ + if (sbrEnvData != NULL) { + + /* write header */ + payloadBits += encodeSbrHeader (sbrHeaderData, + sbrBitstreamData, + cmonData); + + + /* write data */ + payloadBits += encodeSbrData (sbrEnvData, + NULL, + hParametricStereo, + cmonData, + SBR_ID_SCE, + 0, + sbrSyntaxFlags); + + } + return payloadBits; +} + +/***************************************************************************** + + functionname: FDKsbrEnc_WriteEnvChannelPairElement + description: writes pure SBR channel pair data element + returns: number of bits written + input: + output: + +*****************************************************************************/ +INT +FDKsbrEnc_WriteEnvChannelPairElement (HANDLE_SBR_HEADER_DATA sbrHeaderData, + HANDLE_PARAMETRIC_STEREO hParametricStereo, + HANDLE_SBR_BITSTREAM_DATA sbrBitstreamData, + HANDLE_SBR_ENV_DATA sbrEnvDataLeft, + HANDLE_SBR_ENV_DATA sbrEnvDataRight, + HANDLE_COMMON_DATA cmonData, + UINT sbrSyntaxFlags) + +{ + INT payloadBits = 0; + cmonData->sbrHdrBits = 0; + cmonData->sbrDataBits = 0; + + /* write pure sbr data */ + if ((sbrEnvDataLeft != NULL) && (sbrEnvDataRight != NULL)) { + + /* write header */ + payloadBits += encodeSbrHeader (sbrHeaderData, + sbrBitstreamData, + cmonData); + + /* write data */ + payloadBits += encodeSbrData (sbrEnvDataLeft, + sbrEnvDataRight, + hParametricStereo, + cmonData, + SBR_ID_CPE, + sbrHeaderData->coupling, + sbrSyntaxFlags); + + } + return payloadBits; +} + +INT +FDKsbrEnc_CountSbrChannelPairElement (HANDLE_SBR_HEADER_DATA sbrHeaderData, + HANDLE_PARAMETRIC_STEREO hParametricStereo, + HANDLE_SBR_BITSTREAM_DATA sbrBitstreamData, + HANDLE_SBR_ENV_DATA sbrEnvDataLeft, + HANDLE_SBR_ENV_DATA sbrEnvDataRight, + HANDLE_COMMON_DATA cmonData, + UINT sbrSyntaxFlags) +{ + INT payloadBits; + INT bitPos = FDKgetValidBits(&cmonData->sbrBitbuf); + + payloadBits = FDKsbrEnc_WriteEnvChannelPairElement(sbrHeaderData, + hParametricStereo, + sbrBitstreamData, + sbrEnvDataLeft, + sbrEnvDataRight, + cmonData, + sbrSyntaxFlags); + + FDKpushBack(&cmonData->sbrBitbuf, (FDKgetValidBits(&cmonData->sbrBitbuf) - bitPos) ); + + return payloadBits; +} + + +void sbrEncoder_GetHeader(SBR_ENCODER *sbrEncoder, + HANDLE_FDK_BITSTREAM hBs, + INT element_index, + int fSendHeaders) +{ + int bits; + + bits = encodeSbrHeaderData (&sbrEncoder->sbrElement[element_index]->sbrHeaderData, hBs); + + if (fSendHeaders == 0) { + /* Prevent header being embedded into the SBR payload. */ + sbrEncoder->sbrElement[element_index]->sbrBitstreamData.NrSendHeaderData = -1; + sbrEncoder->sbrElement[element_index]->sbrBitstreamData.HeaderActive = 0; + sbrEncoder->sbrElement[element_index]->sbrBitstreamData.CountSendHeaderData = -1; + } +} + + +/***************************************************************************** + + functionname: encodeSbrHeader + description: encodes SBR Header information + returns: number of bits written + input: + output: + +*****************************************************************************/ +static INT +encodeSbrHeader (HANDLE_SBR_HEADER_DATA sbrHeaderData, + HANDLE_SBR_BITSTREAM_DATA sbrBitstreamData, + HANDLE_COMMON_DATA cmonData) +{ + INT payloadBits = 0; + + if (sbrBitstreamData->HeaderActive) { + payloadBits += FDKwriteBits (&cmonData->sbrBitbuf, 1, 1); + payloadBits += encodeSbrHeaderData (sbrHeaderData, + &cmonData->sbrBitbuf); + } + else { + payloadBits += FDKwriteBits (&cmonData->sbrBitbuf, 0, 1); + } + + cmonData->sbrHdrBits = payloadBits; + + return payloadBits; +} + + + +/***************************************************************************** + + functionname: encodeSbrHeaderData + description: writes sbr_header() + bs_protocol_version through bs_header_extra_2 + returns: number of bits written + input: + output: + +*****************************************************************************/ +static INT +encodeSbrHeaderData (HANDLE_SBR_HEADER_DATA sbrHeaderData, + HANDLE_FDK_BITSTREAM hBitStream) + +{ + INT payloadBits = 0; + if (sbrHeaderData != NULL) { + payloadBits += FDKwriteBits (hBitStream, sbrHeaderData->sbr_amp_res, + SI_SBR_AMP_RES_BITS); + payloadBits += FDKwriteBits (hBitStream, sbrHeaderData->sbr_start_frequency, + SI_SBR_START_FREQ_BITS); + payloadBits += FDKwriteBits (hBitStream, sbrHeaderData->sbr_stop_frequency, + SI_SBR_STOP_FREQ_BITS); + payloadBits += FDKwriteBits (hBitStream, sbrHeaderData->sbr_xover_band, + SI_SBR_XOVER_BAND_BITS); + + payloadBits += FDKwriteBits (hBitStream, 0, + SI_SBR_RESERVED_BITS); + + payloadBits += FDKwriteBits (hBitStream, sbrHeaderData->header_extra_1, + SI_SBR_HEADER_EXTRA_1_BITS); + payloadBits += FDKwriteBits (hBitStream, sbrHeaderData->header_extra_2, + SI_SBR_HEADER_EXTRA_2_BITS); + + + if (sbrHeaderData->header_extra_1) { + payloadBits += FDKwriteBits (hBitStream, sbrHeaderData->freqScale, + SI_SBR_FREQ_SCALE_BITS); + payloadBits += FDKwriteBits (hBitStream, sbrHeaderData->alterScale, + SI_SBR_ALTER_SCALE_BITS); + payloadBits += FDKwriteBits (hBitStream, sbrHeaderData->sbr_noise_bands, + SI_SBR_NOISE_BANDS_BITS); + } /* sbrHeaderData->header_extra_1 */ + + if (sbrHeaderData->header_extra_2) { + payloadBits += FDKwriteBits (hBitStream, sbrHeaderData->sbr_limiter_bands, + SI_SBR_LIMITER_BANDS_BITS); + payloadBits += FDKwriteBits (hBitStream, sbrHeaderData->sbr_limiter_gains, + SI_SBR_LIMITER_GAINS_BITS); + payloadBits += FDKwriteBits (hBitStream, sbrHeaderData->sbr_interpol_freq, + SI_SBR_INTERPOL_FREQ_BITS); + payloadBits += FDKwriteBits (hBitStream, sbrHeaderData->sbr_smoothing_length, + SI_SBR_SMOOTHING_LENGTH_BITS); + + } /* sbrHeaderData->header_extra_2 */ + } /* sbrHeaderData != NULL */ + + return payloadBits; +} + + +/***************************************************************************** + + functionname: encodeSbrData + description: encodes sbr Data information + returns: number of bits written + input: + output: + +*****************************************************************************/ +static INT +encodeSbrData (HANDLE_SBR_ENV_DATA sbrEnvDataLeft, + HANDLE_SBR_ENV_DATA sbrEnvDataRight, + HANDLE_PARAMETRIC_STEREO hParametricStereo, + HANDLE_COMMON_DATA cmonData, + SBR_ELEMENT_TYPE sbrElem, + INT coupling, + UINT sbrSyntaxFlags) +{ + INT payloadBits = 0; + + switch (sbrElem) { + case SBR_ID_SCE: + payloadBits += encodeSbrSingleChannelElement (sbrEnvDataLeft, &cmonData->sbrBitbuf, hParametricStereo, sbrSyntaxFlags); + break; + case SBR_ID_CPE: + payloadBits += encodeSbrChannelPairElement (sbrEnvDataLeft, sbrEnvDataRight, hParametricStereo, &cmonData->sbrBitbuf, coupling); + break; + default: + /* we never should apply SBR to any other element type */ + FDK_ASSERT (0); + } + + cmonData->sbrDataBits = payloadBits; + + return payloadBits; +} + +#define MODE_FREQ_TANS 1 +#define MODE_NO_FREQ_TRAN 0 +#define LD_TRANSMISSION MODE_FREQ_TANS +static int encodeFreqs (int mode) { + return ((mode & MODE_FREQ_TANS) ? 1 : 0); +} + + +/***************************************************************************** + + functionname: encodeSbrSingleChannelElement + description: encodes sbr SCE information + returns: number of bits written + input: + output: + +*****************************************************************************/ +static INT +encodeSbrSingleChannelElement (HANDLE_SBR_ENV_DATA sbrEnvData, + HANDLE_FDK_BITSTREAM hBitStream + ,HANDLE_PARAMETRIC_STEREO hParametricStereo + ,UINT sbrSyntaxFlags + ) +{ + INT i, payloadBits = 0; + + payloadBits += FDKwriteBits (hBitStream, 0, SI_SBR_DATA_EXTRA_BITS); /* no reserved bits */ + + if (sbrEnvData->ldGrid) { + if ( sbrEnvData->hSbrBSGrid->frameClass != FIXFIXonly ) { + /* encode normal SbrGrid */ + payloadBits += encodeSbrGrid (sbrEnvData, hBitStream); + } else { + /* use FIXFIXonly frame Grid */ + payloadBits += encodeLowDelaySbrGrid ( sbrEnvData, hBitStream, encodeFreqs(LD_TRANSMISSION)); + } + } + else + { + if (sbrSyntaxFlags & SBR_SYNTAX_SCALABLE) { + payloadBits += FDKwriteBits (hBitStream, 1, SI_SBR_COUPLING_BITS); + } + payloadBits += encodeSbrGrid (sbrEnvData, hBitStream); + } + + payloadBits += encodeSbrDtdf (sbrEnvData, hBitStream); + + for (i = 0; i < sbrEnvData->noOfnoisebands; i++) { + payloadBits += FDKwriteBits (hBitStream, sbrEnvData->sbr_invf_mode_vec[i], SI_SBR_INVF_MODE_BITS); + } + + payloadBits += writeEnvelopeData (sbrEnvData, hBitStream, 0); + payloadBits += writeNoiseLevelData (sbrEnvData, hBitStream, 0); + + payloadBits += writeSyntheticCodingData (sbrEnvData,hBitStream); + + payloadBits += encodeExtendedData(hParametricStereo, hBitStream); + + return payloadBits; +} + + +/***************************************************************************** + + functionname: encodeSbrChannelPairElement + description: encodes sbr CPE information + returns: + input: + output: + +*****************************************************************************/ +static INT +encodeSbrChannelPairElement (HANDLE_SBR_ENV_DATA sbrEnvDataLeft, + HANDLE_SBR_ENV_DATA sbrEnvDataRight, + HANDLE_PARAMETRIC_STEREO hParametricStereo, + HANDLE_FDK_BITSTREAM hBitStream, + INT coupling) +{ + INT payloadBits = 0; + INT i = 0; + + payloadBits += FDKwriteBits (hBitStream, 0, SI_SBR_DATA_EXTRA_BITS); /* no reserved bits */ + + payloadBits += FDKwriteBits (hBitStream, coupling, SI_SBR_COUPLING_BITS); + + if (coupling) { + if (sbrEnvDataLeft->ldGrid) { + if ( sbrEnvDataLeft->hSbrBSGrid->frameClass != FIXFIXonly ) { + /* normal SbrGrid */ + payloadBits += encodeSbrGrid (sbrEnvDataLeft, hBitStream); + + } else { + /* FIXFIXonly frame Grid */ + payloadBits += encodeLowDelaySbrGrid ( sbrEnvDataLeft, hBitStream, encodeFreqs(LD_TRANSMISSION)); + } + } else + payloadBits += encodeSbrGrid (sbrEnvDataLeft, hBitStream); + + payloadBits += encodeSbrDtdf (sbrEnvDataLeft, hBitStream); + payloadBits += encodeSbrDtdf (sbrEnvDataRight, hBitStream); + + for (i = 0; i < sbrEnvDataLeft->noOfnoisebands; i++) { + payloadBits += FDKwriteBits (hBitStream, sbrEnvDataLeft->sbr_invf_mode_vec[i], SI_SBR_INVF_MODE_BITS); + } + + payloadBits += writeEnvelopeData (sbrEnvDataLeft, hBitStream,1); + payloadBits += writeNoiseLevelData (sbrEnvDataLeft, hBitStream,1); + payloadBits += writeEnvelopeData (sbrEnvDataRight, hBitStream,1); + payloadBits += writeNoiseLevelData (sbrEnvDataRight, hBitStream,1); + + payloadBits += writeSyntheticCodingData (sbrEnvDataLeft,hBitStream); + payloadBits += writeSyntheticCodingData (sbrEnvDataRight,hBitStream); + + } else { /* no coupling */ + FDK_ASSERT(sbrEnvDataLeft->ldGrid == sbrEnvDataRight->ldGrid); + + if (sbrEnvDataLeft->ldGrid || sbrEnvDataRight->ldGrid) { + /* sbrEnvDataLeft (left channel) */ + if ( sbrEnvDataLeft->hSbrBSGrid->frameClass != FIXFIXonly) { + /* no FIXFIXonly Frame so we dont need encodeLowDelaySbrGrid */ + /* normal SbrGrid */ + payloadBits += encodeSbrGrid (sbrEnvDataLeft, hBitStream); + + } else { + /* FIXFIXonly frame Grid */ + payloadBits += encodeLowDelaySbrGrid ( sbrEnvDataLeft, hBitStream, encodeFreqs(LD_TRANSMISSION)); + } + + /* sbrEnvDataRight (right channel) */ + if ( sbrEnvDataRight->hSbrBSGrid->frameClass != FIXFIXonly) { + /* no FIXFIXonly Frame so we dont need encodeLowDelaySbrGrid */ + /* normal SbrGrid */ + payloadBits += encodeSbrGrid (sbrEnvDataRight, hBitStream); + + } else { + /* FIXFIXonly frame Grid */ + payloadBits += encodeLowDelaySbrGrid ( sbrEnvDataRight, hBitStream, encodeFreqs(LD_TRANSMISSION)); + } + } else + { + payloadBits += encodeSbrGrid (sbrEnvDataLeft, hBitStream); + payloadBits += encodeSbrGrid (sbrEnvDataRight, hBitStream); + } + payloadBits += encodeSbrDtdf (sbrEnvDataLeft, hBitStream); + payloadBits += encodeSbrDtdf (sbrEnvDataRight, hBitStream); + + for (i = 0; i < sbrEnvDataLeft->noOfnoisebands; i++) { + payloadBits += FDKwriteBits (hBitStream, sbrEnvDataLeft->sbr_invf_mode_vec[i], + SI_SBR_INVF_MODE_BITS); + } + for (i = 0; i < sbrEnvDataRight->noOfnoisebands; i++) { + payloadBits += FDKwriteBits (hBitStream, sbrEnvDataRight->sbr_invf_mode_vec[i], + SI_SBR_INVF_MODE_BITS); + } + + payloadBits += writeEnvelopeData (sbrEnvDataLeft, hBitStream,0); + payloadBits += writeEnvelopeData (sbrEnvDataRight, hBitStream,0); + payloadBits += writeNoiseLevelData (sbrEnvDataLeft, hBitStream,0); + payloadBits += writeNoiseLevelData (sbrEnvDataRight, hBitStream,0); + + payloadBits += writeSyntheticCodingData (sbrEnvDataLeft,hBitStream); + payloadBits += writeSyntheticCodingData (sbrEnvDataRight,hBitStream); + + } /* coupling */ + + payloadBits += encodeExtendedData(hParametricStereo, hBitStream); + + return payloadBits; +} + +static INT ceil_ln2(INT x) +{ + INT tmp=-1; + while((1<<++tmp) < x); + return(tmp); +} + + +/***************************************************************************** + + functionname: encodeSbrGrid + description: if hBitStream != NULL writes bits that describes the + time/frequency grouping of a frame; else counts them only + returns: number of bits written or counted + input: + output: + +*****************************************************************************/ +static INT +encodeSbrGrid (HANDLE_SBR_ENV_DATA sbrEnvData, HANDLE_FDK_BITSTREAM hBitStream) +{ + INT payloadBits = 0; + INT i, temp; + INT bufferFrameStart = sbrEnvData->hSbrBSGrid->bufferFrameStart; + INT numberTimeSlots = sbrEnvData->hSbrBSGrid->numberTimeSlots; + + if (sbrEnvData->ldGrid) + payloadBits += FDKwriteBits (hBitStream, + sbrEnvData->hSbrBSGrid->frameClass, + SBR_CLA_BITS_LD); + else + payloadBits += FDKwriteBits (hBitStream, + sbrEnvData->hSbrBSGrid->frameClass, + SBR_CLA_BITS); + + switch (sbrEnvData->hSbrBSGrid->frameClass) { + case FIXFIXonly: + FDK_ASSERT(0 /* Fatal error in encodeSbrGrid! */); + break; + case FIXFIX: + temp = ceil_ln2(sbrEnvData->hSbrBSGrid->bs_num_env); + payloadBits += FDKwriteBits (hBitStream, temp, SBR_ENV_BITS); + if ((sbrEnvData->ldGrid) && (sbrEnvData->hSbrBSGrid->bs_num_env==1)) + payloadBits += FDKwriteBits(hBitStream, sbrEnvData->currentAmpResFF, SI_SBR_AMP_RES_BITS); + payloadBits += FDKwriteBits (hBitStream, sbrEnvData->hSbrBSGrid->v_f[0], SBR_RES_BITS); + + break; + + case FIXVAR: + case VARFIX: + if (sbrEnvData->hSbrBSGrid->frameClass == FIXVAR) + temp = sbrEnvData->hSbrBSGrid->bs_abs_bord - (bufferFrameStart + numberTimeSlots); + else + temp = sbrEnvData->hSbrBSGrid->bs_abs_bord - bufferFrameStart; + + payloadBits += FDKwriteBits (hBitStream, temp, SBR_ABS_BITS); + payloadBits += FDKwriteBits (hBitStream, sbrEnvData->hSbrBSGrid->n, SBR_NUM_BITS); + + for (i = 0; i < sbrEnvData->hSbrBSGrid->n; i++) { + temp = (sbrEnvData->hSbrBSGrid->bs_rel_bord[i] - 2) >> 1; + payloadBits += FDKwriteBits (hBitStream, temp, SBR_REL_BITS); + } + + temp = ceil_ln2(sbrEnvData->hSbrBSGrid->n + 2); + payloadBits += FDKwriteBits (hBitStream, sbrEnvData->hSbrBSGrid->p, temp); + + for (i = 0; i < sbrEnvData->hSbrBSGrid->n + 1; i++) { + payloadBits += FDKwriteBits (hBitStream, sbrEnvData->hSbrBSGrid->v_f[i], + SBR_RES_BITS); + } + break; + + case VARVAR: + temp = sbrEnvData->hSbrBSGrid->bs_abs_bord_0 - bufferFrameStart; + payloadBits += FDKwriteBits (hBitStream, temp, SBR_ABS_BITS); + temp = sbrEnvData->hSbrBSGrid->bs_abs_bord_1 - (bufferFrameStart + numberTimeSlots); + payloadBits += FDKwriteBits (hBitStream, temp, SBR_ABS_BITS); + + payloadBits += FDKwriteBits (hBitStream, sbrEnvData->hSbrBSGrid->bs_num_rel_0, SBR_NUM_BITS); + payloadBits += FDKwriteBits (hBitStream, sbrEnvData->hSbrBSGrid->bs_num_rel_1, SBR_NUM_BITS); + + for (i = 0; i < sbrEnvData->hSbrBSGrid->bs_num_rel_0; i++) { + temp = (sbrEnvData->hSbrBSGrid->bs_rel_bord_0[i] - 2) >> 1; + payloadBits += FDKwriteBits (hBitStream, temp, SBR_REL_BITS); + } + + for (i = 0; i < sbrEnvData->hSbrBSGrid->bs_num_rel_1; i++) { + temp = (sbrEnvData->hSbrBSGrid->bs_rel_bord_1[i] - 2) >> 1; + payloadBits += FDKwriteBits (hBitStream, temp, SBR_REL_BITS); + } + + temp = ceil_ln2(sbrEnvData->hSbrBSGrid->bs_num_rel_0 + + sbrEnvData->hSbrBSGrid->bs_num_rel_1 + 2); + payloadBits += FDKwriteBits (hBitStream, sbrEnvData->hSbrBSGrid->p, temp); + + temp = sbrEnvData->hSbrBSGrid->bs_num_rel_0 + + sbrEnvData->hSbrBSGrid->bs_num_rel_1 + 1; + + for (i = 0; i < temp; i++) { + payloadBits += FDKwriteBits (hBitStream, sbrEnvData->hSbrBSGrid->v_fLR[i], + SBR_RES_BITS); + } + break; + } + + return payloadBits; +} + +#define SBR_CLA_BITS_LD 1 +/***************************************************************************** + + functionname: encodeLowDelaySbrGrid + description: if hBitStream != NULL writes bits that describes the + time/frequency grouping of a frame; + else counts them only + (this function only write the FIXFIXonly Bitstream data) + returns: number of bits written or counted + input: + output: + +*****************************************************************************/ +static int +encodeLowDelaySbrGrid ( HANDLE_SBR_ENV_DATA sbrEnvData, + HANDLE_FDK_BITSTREAM hBitStream, + int transmitFreqs + ) +{ + int payloadBits = 0; + int i; + + /* write FIXFIXonly Grid */ + /* write frameClass [1 bit] for FIXFIXonly Grid */ + payloadBits += FDKwriteBits(hBitStream, 1, SBR_CLA_BITS_LD); + + /* absolute Borders are fix: 0,X,X,X,nTimeSlots; so we dont have to transmit them */ + /* only transmit the transient position! */ + /* with this info (b1) we can reconstruct the Frame on Decoder side : */ + /* border[0] = 0; border[1] = b1; border[2]=b1+2; border[3] = nrTimeSlots */ + + /* use 3 or 4bits for transient border (border) */ + if (sbrEnvData->hSbrBSGrid->numberTimeSlots == 8) + payloadBits += FDKwriteBits ( hBitStream, sbrEnvData->hSbrBSGrid->bs_abs_bord, 3); + else + payloadBits += FDKwriteBits ( hBitStream, sbrEnvData->hSbrBSGrid->bs_abs_bord, 4); + + if (transmitFreqs) { + /* write FreqRes grid */ + for (i = 0; i < sbrEnvData->hSbrBSGrid->bs_num_env; i++) { + payloadBits += FDKwriteBits (hBitStream, sbrEnvData->hSbrBSGrid->v_f[i], SBR_RES_BITS); + } + } + + return payloadBits; +} + +/***************************************************************************** + + functionname: encodeSbrDtdf + description: writes bits that describes the direction of the envelopes of a frame + returns: number of bits written + input: + output: + +*****************************************************************************/ +static INT +encodeSbrDtdf (HANDLE_SBR_ENV_DATA sbrEnvData, HANDLE_FDK_BITSTREAM hBitStream) +{ + INT i, payloadBits = 0, noOfNoiseEnvelopes; + + noOfNoiseEnvelopes = sbrEnvData->noOfEnvelopes > 1 ? 2 : 1; + + for (i = 0; i < sbrEnvData->noOfEnvelopes; ++i) { + payloadBits += FDKwriteBits (hBitStream, sbrEnvData->domain_vec[i], SBR_DIR_BITS); + } + for (i = 0; i < noOfNoiseEnvelopes; ++i) { + payloadBits += FDKwriteBits (hBitStream, sbrEnvData->domain_vec_noise[i], SBR_DIR_BITS); + } + + return payloadBits; +} + + +/***************************************************************************** + + functionname: writeNoiseLevelData + description: writes bits corresponding to the noise-floor-level + returns: number of bits written + input: + output: + +*****************************************************************************/ +static INT +writeNoiseLevelData (HANDLE_SBR_ENV_DATA sbrEnvData, HANDLE_FDK_BITSTREAM hBitStream, INT coupling) +{ + INT j, i, payloadBits = 0; + INT nNoiseEnvelopes = sbrEnvData->noOfEnvelopes > 1 ? 2 : 1; + + for (i = 0; i < nNoiseEnvelopes; i++) { + switch (sbrEnvData->domain_vec_noise[i]) { + case FREQ: + if (coupling && sbrEnvData->balance) { + payloadBits += FDKwriteBits (hBitStream, + sbrEnvData->sbr_noise_levels[i * sbrEnvData->noOfnoisebands], + sbrEnvData->si_sbr_start_noise_bits_balance); + } else { + payloadBits += FDKwriteBits (hBitStream, + sbrEnvData->sbr_noise_levels[i * sbrEnvData->noOfnoisebands], + sbrEnvData->si_sbr_start_noise_bits); + } + + for (j = 1 + i * sbrEnvData->noOfnoisebands; j < (sbrEnvData->noOfnoisebands * (1 + i)); j++) { + if (coupling) { + if (sbrEnvData->balance) { + /* coupling && balance */ + payloadBits += FDKwriteBits (hBitStream, + sbrEnvData->hufftableNoiseBalanceFreqC[sbrEnvData->sbr_noise_levels[j] + + CODE_BOOK_SCF_LAV_BALANCE11], + sbrEnvData->hufftableNoiseBalanceFreqL[sbrEnvData->sbr_noise_levels[j] + + CODE_BOOK_SCF_LAV_BALANCE11]); + } else { + /* coupling && !balance */ + payloadBits += FDKwriteBits (hBitStream, + sbrEnvData->hufftableNoiseLevelFreqC[sbrEnvData->sbr_noise_levels[j] + + CODE_BOOK_SCF_LAV11], + sbrEnvData->hufftableNoiseLevelFreqL[sbrEnvData->sbr_noise_levels[j] + + CODE_BOOK_SCF_LAV11]); + } + } else { + /* !coupling */ + payloadBits += FDKwriteBits (hBitStream, + sbrEnvData->hufftableNoiseFreqC[sbrEnvData->sbr_noise_levels[j] + + CODE_BOOK_SCF_LAV11], + sbrEnvData->hufftableNoiseFreqL[sbrEnvData->sbr_noise_levels[j] + + CODE_BOOK_SCF_LAV11]); + } + } + break; + + case TIME: + for (j = i * sbrEnvData->noOfnoisebands; j < (sbrEnvData->noOfnoisebands * (1 + i)); j++) { + if (coupling) { + if (sbrEnvData->balance) { + /* coupling && balance */ + payloadBits += FDKwriteBits (hBitStream, + sbrEnvData->hufftableNoiseBalanceTimeC[sbrEnvData->sbr_noise_levels[j] + + CODE_BOOK_SCF_LAV_BALANCE11], + sbrEnvData->hufftableNoiseBalanceTimeL[sbrEnvData->sbr_noise_levels[j] + + CODE_BOOK_SCF_LAV_BALANCE11]); + } else { + /* coupling && !balance */ + payloadBits += FDKwriteBits (hBitStream, + sbrEnvData->hufftableNoiseLevelTimeC[sbrEnvData->sbr_noise_levels[j] + + CODE_BOOK_SCF_LAV11], + sbrEnvData->hufftableNoiseLevelTimeL[sbrEnvData->sbr_noise_levels[j] + + CODE_BOOK_SCF_LAV11]); + } + } else { + /* !coupling */ + payloadBits += FDKwriteBits (hBitStream, + sbrEnvData->hufftableNoiseLevelTimeC[sbrEnvData->sbr_noise_levels[j] + + CODE_BOOK_SCF_LAV11], + sbrEnvData->hufftableNoiseLevelTimeL[sbrEnvData->sbr_noise_levels[j] + + CODE_BOOK_SCF_LAV11]); + } + } + break; + } + } + return payloadBits; +} + + +/***************************************************************************** + + functionname: writeEnvelopeData + description: writes bits corresponding to the envelope + returns: number of bits written + input: + output: + +*****************************************************************************/ +static INT +writeEnvelopeData (HANDLE_SBR_ENV_DATA sbrEnvData, HANDLE_FDK_BITSTREAM hBitStream, INT coupling) +{ + INT payloadBits = 0, j, i, delta; + + for (j = 0; j < sbrEnvData->noOfEnvelopes; j++) { /* loop over all envelopes */ + if (sbrEnvData->domain_vec[j] == FREQ) { + if (coupling && sbrEnvData->balance) { + payloadBits += FDKwriteBits (hBitStream, sbrEnvData->ienvelope[j][0], sbrEnvData->si_sbr_start_env_bits_balance); + } else { + payloadBits += FDKwriteBits (hBitStream, sbrEnvData->ienvelope[j][0], sbrEnvData->si_sbr_start_env_bits); + } + } + + for (i = 1 - sbrEnvData->domain_vec[j]; i < sbrEnvData->noScfBands[j]; i++) { + delta = sbrEnvData->ienvelope[j][i]; + if (coupling && sbrEnvData->balance) { + FDK_ASSERT (fixp_abs (delta) <= sbrEnvData->codeBookScfLavBalance); + } else { + FDK_ASSERT (fixp_abs (delta) <= sbrEnvData->codeBookScfLav); + } + if (coupling) { + if (sbrEnvData->balance) { + if (sbrEnvData->domain_vec[j]) { + /* coupling && balance && TIME */ + payloadBits += FDKwriteBits (hBitStream, + sbrEnvData->hufftableBalanceTimeC[delta + sbrEnvData->codeBookScfLavBalance], + sbrEnvData->hufftableBalanceTimeL[delta + sbrEnvData->codeBookScfLavBalance]); + } else { + /* coupling && balance && FREQ */ + payloadBits += FDKwriteBits (hBitStream, + sbrEnvData->hufftableBalanceFreqC[delta + sbrEnvData->codeBookScfLavBalance], + sbrEnvData->hufftableBalanceFreqL[delta + sbrEnvData->codeBookScfLavBalance]); + } + } else { + if (sbrEnvData->domain_vec[j]) { + /* coupling && !balance && TIME */ + payloadBits += FDKwriteBits (hBitStream, + sbrEnvData->hufftableLevelTimeC[delta + sbrEnvData->codeBookScfLav], + sbrEnvData->hufftableLevelTimeL[delta + sbrEnvData->codeBookScfLav]); + } else { + /* coupling && !balance && FREQ */ + payloadBits += FDKwriteBits (hBitStream, + sbrEnvData->hufftableLevelFreqC[delta + sbrEnvData->codeBookScfLav], + sbrEnvData->hufftableLevelFreqL[delta + sbrEnvData->codeBookScfLav]); + } + } + } else { + if (sbrEnvData->domain_vec[j]) { + /* !coupling && TIME */ + payloadBits += FDKwriteBits (hBitStream, + sbrEnvData->hufftableTimeC[delta + sbrEnvData->codeBookScfLav], + sbrEnvData->hufftableTimeL[delta + sbrEnvData->codeBookScfLav]); + } else { + /* !coupling && FREQ */ + payloadBits += FDKwriteBits (hBitStream, + sbrEnvData->hufftableFreqC[delta + sbrEnvData->codeBookScfLav], + sbrEnvData->hufftableFreqL[delta + sbrEnvData->codeBookScfLav]); + } + } + } + } + return payloadBits; +} + + +/***************************************************************************** + + functionname: encodeExtendedData + description: writes bits corresponding to the extended data + returns: number of bits written + input: + output: + +*****************************************************************************/ +static INT encodeExtendedData (HANDLE_PARAMETRIC_STEREO hParametricStereo, + HANDLE_FDK_BITSTREAM hBitStream) +{ + INT extDataSize; + INT payloadBits = 0; + + extDataSize = getSbrExtendedDataSize(hParametricStereo); + + + if (extDataSize != 0) { + INT maxExtSize = (1<<SI_SBR_EXTENSION_SIZE_BITS) - 1; + INT writtenNoBits = 0; /* needed to byte align the extended data */ + + payloadBits += FDKwriteBits (hBitStream, 1, SI_SBR_EXTENDED_DATA_BITS); + FDK_ASSERT(extDataSize <= SBR_EXTENDED_DATA_MAX_CNT); + + if (extDataSize < maxExtSize) { + payloadBits += FDKwriteBits (hBitStream, extDataSize, SI_SBR_EXTENSION_SIZE_BITS); + } else { + payloadBits += FDKwriteBits (hBitStream, maxExtSize, SI_SBR_EXTENSION_SIZE_BITS); + payloadBits += FDKwriteBits (hBitStream, extDataSize - maxExtSize, SI_SBR_EXTENSION_ESC_COUNT_BITS); + } + + /* parametric coding signalled here? */ + if(hParametricStereo){ + writtenNoBits += FDKwriteBits (hBitStream, EXTENSION_ID_PS_CODING, SI_SBR_EXTENSION_ID_BITS); + writtenNoBits += FDKsbrEnc_PSEnc_WritePSData(hParametricStereo, hBitStream); + } + + payloadBits += writtenNoBits; + + /* byte alignment */ + writtenNoBits = writtenNoBits%8; + if(writtenNoBits) + payloadBits += FDKwriteBits(hBitStream, 0, (8 - writtenNoBits)); + } else { + payloadBits += FDKwriteBits (hBitStream, 0, SI_SBR_EXTENDED_DATA_BITS); + } + + return payloadBits; +} + + +/***************************************************************************** + + functionname: writeSyntheticCodingData + description: writes bits corresponding to the "synthetic-coding"-extension + returns: number of bits written + input: + output: + +*****************************************************************************/ +static INT writeSyntheticCodingData (HANDLE_SBR_ENV_DATA sbrEnvData, + HANDLE_FDK_BITSTREAM hBitStream) + +{ + INT i; + INT payloadBits = 0; + + payloadBits += FDKwriteBits (hBitStream, sbrEnvData->addHarmonicFlag, 1); + + if (sbrEnvData->addHarmonicFlag) { + for (i = 0; i < sbrEnvData->noHarmonics; i++) { + payloadBits += FDKwriteBits (hBitStream, sbrEnvData->addHarmonic[i], 1); + } + } + + return payloadBits; +} + +/***************************************************************************** + + functionname: getSbrExtendedDataSize + description: counts the number of bits needed for encoding the + extended data (including extension id) + + returns: number of bits needed for the extended data + input: + output: + +*****************************************************************************/ +static INT +getSbrExtendedDataSize (HANDLE_PARAMETRIC_STEREO hParametricStereo) +{ + INT extDataBits = 0; + + /* add your new extended data counting methods here */ + + /* + no extended data + */ + + if(hParametricStereo){ + /* PS extended data */ + extDataBits += SI_SBR_EXTENSION_ID_BITS; + extDataBits += FDKsbrEnc_PSEnc_WritePSData(hParametricStereo, NULL); + } + + return (extDataBits+7) >> 3; +} + + + + + |