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+/* -----------------------------------------------------------------------------
+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
+----------------------------------------------------------------------------- */
+
+/**************************** SBR encoder library ******************************
+
+ Author(s):
+
+ Description:
+
+*******************************************************************************/
+
+/*!
+ \file
+ \brief SBR bit writing routines $Revision: 93300 $
+*/
+
+#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, const UINT sbrSyntaxFlags);
+
+static INT encodeSbrChannelPairElement(
+ HANDLE_SBR_ENV_DATA sbrEnvDataLeft, HANDLE_SBR_ENV_DATA sbrEnvDataRight,
+ HANDLE_PARAMETRIC_STEREO hParametricStereo, HANDLE_FDK_BITSTREAM hBitStream,
+ const INT coupling, const UINT sbrSyntaxFlags);
+
+static INT encodeSbrGrid(HANDLE_SBR_ENV_DATA sbrEnvData,
+ HANDLE_FDK_BITSTREAM hBitStream);
+
+static int encodeLowDelaySbrGrid(HANDLE_SBR_ENV_DATA sbrEnvData,
+ HANDLE_FDK_BITSTREAM hBitStream,
+ const int transmitFreqs,
+ const UINT sbrSyntaxFlags);
+
+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) {
+ 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, sbrSyntaxFlags);
+ 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, const 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), sbrSyntaxFlags);
+ }
+ } 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,
+ const INT coupling, const UINT sbrSyntaxFlags) {
+ 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), sbrSyntaxFlags);
+ }
+ } 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), sbrSyntaxFlags);
+ }
+
+ /* 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), sbrSyntaxFlags);
+ }
+ } 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,
+ const int transmitFreqs,
+ const UINT sbrSyntaxFlags) {
+ 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;
+}