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authorThe Android Open Source Project <initial-contribution@android.com>2012-07-11 10:15:24 -0700
committerThe Android Open Source Project <initial-contribution@android.com>2012-07-11 10:15:24 -0700
commit2228e360595641dd906bf1773307f43d304f5b2e (patch)
tree57f3d390ebb0782cc0de0fb984c8ea7e45b4f386 /libSBRenc/src/bit_sbr.cpp
downloadODR-AudioEnc-2228e360595641dd906bf1773307f43d304f5b2e.tar.gz
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Snapshot 2bda038c163298531d47394bc2c09e1409c5d0db
Change-Id: If584e579464f28b97d50e51fc76ba654a5536c54
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+
+/* -----------------------------------------------------------------------------------------------------------
+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;
+}
+
+
+
+
+