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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
+----------------------------------------------------------------------------- */
+
+/**************************** AAC encoder library ******************************
+
+ Author(s): A. Groeschel
+
+ Description: channel mapping functionality
+
+*******************************************************************************/
+
+#include "channel_map.h"
+#include "bitenc.h"
+#include "psy_const.h"
+#include "qc_data.h"
+#include "aacEnc_ram.h"
+#include "FDK_tools_rom.h"
+
+/* channel_assignment treats the relationship of Input file channels
+ to the encoder channels.
+ This is necessary because the usual order in RIFF files (.wav)
+ is different from the elements order in the coder given
+ by Table 8.1 (implicit speaker mapping) of the AAC standard.
+
+ In mono and stereo case, this is trivial.
+ In mc case, it looks like this:
+
+ Channel Input file coder chan
+5ch:
+ front center 2 0 (SCE channel)
+ left center 0 1 (1st of 1st CPE)
+ right center 1 2 (2nd of 1st CPE)
+ left surround 3 3 (1st of 2nd CPE)
+ right surround 4 4 (2nd of 2nd CPE)
+
+5.1ch:
+ front center 2 0 (SCE channel)
+ left center 0 1 (1st of 1st CPE)
+ right center 1 2 (2nd of 1st CPE)
+ left surround 4 3 (1st of 2nd CPE)
+ right surround 5 4 (2nd of 2nd CPE)
+ LFE 3 5 (LFE)
+*/
+
+/* Channel mode configuration tab provides,
+ corresponding number of channels and elements
+*/
+static const CHANNEL_MODE_CONFIG_TAB channelModeConfig[] = {
+ {MODE_1, 1, 1, 1}, /* chCfg 1, SCE */
+ {MODE_2, 2, 2, 1}, /* chCfg 2, CPE */
+ {MODE_1_2, 3, 3, 2}, /* chCfg 3, SCE,CPE */
+ {MODE_1_2_1, 4, 4, 3}, /* chCfg 4, SCE,CPE,SCE */
+ {MODE_1_2_2, 5, 5, 3}, /* chCfg 5, SCE,CPE,CPE */
+ {MODE_1_2_2_1, 6, 5, 4}, /* chCfg 6, SCE,CPE,CPE,LFE */
+ {MODE_1_2_2_2_1, 8, 7, 5}, /* chCfg 7, SCE,CPE,CPE,CPE,LFE */
+ {MODE_6_1, 7, 6, 5}, /* chCfg 11, SCE,CPE,CPE,SCE,LFE */
+ {MODE_7_1_BACK, 8, 7, 5}, /* chCfg 12, SCE,CPE,CPE,CPE,LFE */
+ {MODE_7_1_TOP_FRONT, 8, 7, 5}, /* chCfg 14, SCE,CPE,CPE,LFE,CPE */
+ {MODE_7_1_REAR_SURROUND, 8, 7,
+ 5}, /* same as MODE_7_1_BACK, SCE,CPE,CPE,CPE,LFE */
+ {MODE_7_1_FRONT_CENTER, 8, 7,
+ 5}, /* same as MODE_1_2_2_2_1, SCE,CPE,CPE,CPE,LFE */
+
+};
+
+AAC_ENCODER_ERROR FDKaacEnc_DetermineEncoderMode(CHANNEL_MODE* mode,
+ INT nChannels) {
+ INT i;
+ CHANNEL_MODE encMode = MODE_INVALID;
+
+ if (*mode == MODE_UNKNOWN) {
+ for (i = 0; i < (INT)sizeof(channelModeConfig) /
+ (INT)sizeof(CHANNEL_MODE_CONFIG_TAB);
+ i++) {
+ if (channelModeConfig[i].nChannels == nChannels) {
+ encMode = channelModeConfig[i].encMode;
+ break;
+ }
+ }
+ *mode = encMode;
+ } else {
+ /* check if valid channel configuration */
+ if (FDKaacEnc_GetChannelModeConfiguration(*mode)->nChannels == nChannels) {
+ encMode = *mode;
+ }
+ }
+
+ if (encMode == MODE_INVALID) {
+ return AAC_ENC_UNSUPPORTED_CHANNELCONFIG;
+ }
+
+ return AAC_ENC_OK;
+}
+
+static INT FDKaacEnc_initElement(ELEMENT_INFO* elInfo, MP4_ELEMENT_ID elType,
+ INT* cnt, FDK_channelMapDescr* mapDescr,
+ UINT mapIdx, INT* it_cnt,
+ const FIXP_DBL relBits) {
+ INT error = 0;
+ INT counter = *cnt;
+
+ elInfo->elType = elType;
+ elInfo->relativeBits = relBits;
+
+ switch (elInfo->elType) {
+ case ID_SCE:
+ case ID_LFE:
+ case ID_CCE:
+ elInfo->nChannelsInEl = 1;
+ elInfo->ChannelIndex[0] =
+ FDK_chMapDescr_getMapValue(mapDescr, counter++, mapIdx);
+ elInfo->instanceTag = it_cnt[elType]++;
+ break;
+ case ID_CPE:
+ elInfo->nChannelsInEl = 2;
+ elInfo->ChannelIndex[0] =
+ FDK_chMapDescr_getMapValue(mapDescr, counter++, mapIdx);
+ elInfo->ChannelIndex[1] =
+ FDK_chMapDescr_getMapValue(mapDescr, counter++, mapIdx);
+ elInfo->instanceTag = it_cnt[elType]++;
+ break;
+ case ID_DSE:
+ elInfo->nChannelsInEl = 0;
+ elInfo->ChannelIndex[0] = 0;
+ elInfo->ChannelIndex[1] = 0;
+ elInfo->instanceTag = it_cnt[elType]++;
+ break;
+ default:
+ error = 1;
+ };
+ *cnt = counter;
+ return error;
+}
+
+AAC_ENCODER_ERROR FDKaacEnc_InitChannelMapping(CHANNEL_MODE mode,
+ CHANNEL_ORDER co,
+ CHANNEL_MAPPING* cm) {
+ INT count = 0; /* count through coder channels */
+ INT it_cnt[ID_END + 1];
+ INT i;
+ UINT mapIdx;
+ FDK_channelMapDescr mapDescr;
+
+ for (i = 0; i < ID_END; i++) it_cnt[i] = 0;
+
+ FDKmemclear(cm, sizeof(CHANNEL_MAPPING));
+
+ /* init channel mapping*/
+ for (i = 0; i < (INT)sizeof(channelModeConfig) /
+ (INT)sizeof(CHANNEL_MODE_CONFIG_TAB);
+ i++) {
+ if (channelModeConfig[i].encMode == mode) {
+ cm->encMode = channelModeConfig[i].encMode;
+ cm->nChannels = channelModeConfig[i].nChannels;
+ cm->nChannelsEff = channelModeConfig[i].nChannelsEff;
+ cm->nElements = channelModeConfig[i].nElements;
+
+ break;
+ }
+ }
+
+ /* init map descriptor */
+ FDK_chMapDescr_init(&mapDescr, NULL, 0, (co == CH_ORDER_MPEG) ? 1 : 0);
+ switch (mode) {
+ case MODE_7_1_REAR_SURROUND: /* MODE_7_1_REAR_SURROUND is equivalent to
+ MODE_7_1_BACK */
+ mapIdx = (INT)MODE_7_1_BACK;
+ break;
+ case MODE_7_1_FRONT_CENTER: /* MODE_7_1_FRONT_CENTER is equivalent to
+ MODE_1_2_2_2_1 */
+ mapIdx = (INT)MODE_1_2_2_2_1;
+ break;
+ default:
+ mapIdx =
+ (INT)mode > 14
+ ? 0
+ : (INT)
+ mode; /* if channel config > 14 MPEG mapping will be used */
+ }
+
+ /* init element info struct */
+ switch (mode) {
+ case MODE_1:
+ /* (mono) sce */
+ FDKaacEnc_initElement(&cm->elInfo[0], ID_SCE, &count, &mapDescr, mapIdx,
+ it_cnt, (FIXP_DBL)MAXVAL_DBL);
+ break;
+ case MODE_2:
+ /* (stereo) cpe */
+ FDKaacEnc_initElement(&cm->elInfo[0], ID_CPE, &count, &mapDescr, mapIdx,
+ it_cnt, (FIXP_DBL)MAXVAL_DBL);
+ break;
+
+ case MODE_1_2:
+ /* sce + cpe */
+ FDKaacEnc_initElement(&cm->elInfo[0], ID_SCE, &count, &mapDescr, mapIdx,
+ it_cnt, FL2FXCONST_DBL(0.4f));
+ FDKaacEnc_initElement(&cm->elInfo[1], ID_CPE, &count, &mapDescr, mapIdx,
+ it_cnt, FL2FXCONST_DBL(0.6f));
+ break;
+
+ case MODE_1_2_1:
+ /* sce + cpe + sce */
+ FDKaacEnc_initElement(&cm->elInfo[0], ID_SCE, &count, &mapDescr, mapIdx,
+ it_cnt, FL2FXCONST_DBL(0.3f));
+ FDKaacEnc_initElement(&cm->elInfo[1], ID_CPE, &count, &mapDescr, mapIdx,
+ it_cnt, FL2FXCONST_DBL(0.4f));
+ FDKaacEnc_initElement(&cm->elInfo[2], ID_SCE, &count, &mapDescr, mapIdx,
+ it_cnt, FL2FXCONST_DBL(0.3f));
+ break;
+
+ case MODE_1_2_2:
+ /* sce + cpe + cpe */
+ FDKaacEnc_initElement(&cm->elInfo[0], ID_SCE, &count, &mapDescr, mapIdx,
+ it_cnt, FL2FXCONST_DBL(0.26f));
+ FDKaacEnc_initElement(&cm->elInfo[1], ID_CPE, &count, &mapDescr, mapIdx,
+ it_cnt, FL2FXCONST_DBL(0.37f));
+ FDKaacEnc_initElement(&cm->elInfo[2], ID_CPE, &count, &mapDescr, mapIdx,
+ it_cnt, FL2FXCONST_DBL(0.37f));
+ break;
+
+ case MODE_1_2_2_1:
+ /* (5.1) sce + cpe + cpe + lfe */
+ FDKaacEnc_initElement(&cm->elInfo[0], ID_SCE, &count, &mapDescr, mapIdx,
+ it_cnt, FL2FXCONST_DBL(0.24f));
+ FDKaacEnc_initElement(&cm->elInfo[1], ID_CPE, &count, &mapDescr, mapIdx,
+ it_cnt, FL2FXCONST_DBL(0.35f));
+ FDKaacEnc_initElement(&cm->elInfo[2], ID_CPE, &count, &mapDescr, mapIdx,
+ it_cnt, FL2FXCONST_DBL(0.35f));
+ FDKaacEnc_initElement(&cm->elInfo[3], ID_LFE, &count, &mapDescr, mapIdx,
+ it_cnt, FL2FXCONST_DBL(0.06f));
+ break;
+
+ case MODE_6_1:
+ /* (6.1) sce + cpe + cpe + sce + lfe */
+ FDKaacEnc_initElement(&cm->elInfo[0], ID_SCE, &count, &mapDescr, mapIdx,
+ it_cnt, FL2FXCONST_DBL(0.2f));
+ FDKaacEnc_initElement(&cm->elInfo[1], ID_CPE, &count, &mapDescr, mapIdx,
+ it_cnt, FL2FXCONST_DBL(0.275f));
+ FDKaacEnc_initElement(&cm->elInfo[2], ID_CPE, &count, &mapDescr, mapIdx,
+ it_cnt, FL2FXCONST_DBL(0.275f));
+ FDKaacEnc_initElement(&cm->elInfo[3], ID_SCE, &count, &mapDescr, mapIdx,
+ it_cnt, FL2FXCONST_DBL(0.2f));
+ FDKaacEnc_initElement(&cm->elInfo[4], ID_LFE, &count, &mapDescr, mapIdx,
+ it_cnt, FL2FXCONST_DBL(0.05f));
+ break;
+
+ case MODE_1_2_2_2_1:
+ case MODE_7_1_BACK:
+ case MODE_7_1_TOP_FRONT:
+ case MODE_7_1_REAR_SURROUND:
+ case MODE_7_1_FRONT_CENTER: {
+ /* (7.1) sce + cpe + cpe + cpe + lfe */
+ /* (7.1 top) sce + cpe + cpe + lfe + cpe */
+
+ FDKaacEnc_initElement(&cm->elInfo[0], ID_SCE, &count, &mapDescr, mapIdx,
+ it_cnt, FL2FXCONST_DBL(0.18f));
+ FDKaacEnc_initElement(&cm->elInfo[1], ID_CPE, &count, &mapDescr, mapIdx,
+ it_cnt, FL2FXCONST_DBL(0.26f));
+ FDKaacEnc_initElement(&cm->elInfo[2], ID_CPE, &count, &mapDescr, mapIdx,
+ it_cnt, FL2FXCONST_DBL(0.26f));
+ if (mode != MODE_7_1_TOP_FRONT) {
+ FDKaacEnc_initElement(&cm->elInfo[3], ID_CPE, &count, &mapDescr, mapIdx,
+ it_cnt, FL2FXCONST_DBL(0.26f));
+ FDKaacEnc_initElement(&cm->elInfo[4], ID_LFE, &count, &mapDescr, mapIdx,
+ it_cnt, FL2FXCONST_DBL(0.04f));
+ } else {
+ FDKaacEnc_initElement(&cm->elInfo[3], ID_LFE, &count, &mapDescr, mapIdx,
+ it_cnt, FL2FXCONST_DBL(0.04f));
+ FDKaacEnc_initElement(&cm->elInfo[4], ID_CPE, &count, &mapDescr, mapIdx,
+ it_cnt, FL2FXCONST_DBL(0.26f));
+ }
+ break;
+ }
+
+ default:
+ //*chMap=0;
+ return AAC_ENC_UNSUPPORTED_CHANNELCONFIG;
+ };
+
+ FDK_ASSERT(cm->nElements <= ((8)));
+
+ return AAC_ENC_OK;
+}
+
+AAC_ENCODER_ERROR FDKaacEnc_InitElementBits(QC_STATE* hQC, CHANNEL_MAPPING* cm,
+ INT bitrateTot, INT averageBitsTot,
+ INT maxChannelBits) {
+ int sc_brTot = CountLeadingBits(bitrateTot);
+
+ switch (cm->encMode) {
+ case MODE_1:
+ hQC->elementBits[0]->chBitrateEl = bitrateTot;
+
+ hQC->elementBits[0]->maxBitsEl = maxChannelBits;
+
+ hQC->elementBits[0]->relativeBitsEl = cm->elInfo[0].relativeBits;
+ break;
+
+ case MODE_2:
+ hQC->elementBits[0]->chBitrateEl = bitrateTot >> 1;
+
+ hQC->elementBits[0]->maxBitsEl = 2 * maxChannelBits;
+
+ hQC->elementBits[0]->relativeBitsEl = cm->elInfo[0].relativeBits;
+ break;
+ case MODE_1_2: {
+ hQC->elementBits[0]->relativeBitsEl = cm->elInfo[0].relativeBits;
+ hQC->elementBits[1]->relativeBitsEl = cm->elInfo[1].relativeBits;
+ FIXP_DBL sceRate = cm->elInfo[0].relativeBits;
+ FIXP_DBL cpeRate = cm->elInfo[1].relativeBits;
+
+ hQC->elementBits[0]->chBitrateEl =
+ fMult(sceRate, (FIXP_DBL)(bitrateTot << sc_brTot)) >> sc_brTot;
+ hQC->elementBits[1]->chBitrateEl =
+ fMult(cpeRate, (FIXP_DBL)(bitrateTot << sc_brTot)) >> (sc_brTot + 1);
+
+ hQC->elementBits[0]->maxBitsEl = maxChannelBits;
+ hQC->elementBits[1]->maxBitsEl = 2 * maxChannelBits;
+ break;
+ }
+ case MODE_1_2_1: {
+ /* sce + cpe + sce */
+ hQC->elementBits[0]->relativeBitsEl = cm->elInfo[0].relativeBits;
+ hQC->elementBits[1]->relativeBitsEl = cm->elInfo[1].relativeBits;
+ hQC->elementBits[2]->relativeBitsEl = cm->elInfo[2].relativeBits;
+ FIXP_DBL sce1Rate = cm->elInfo[0].relativeBits;
+ FIXP_DBL cpeRate = cm->elInfo[1].relativeBits;
+ FIXP_DBL sce2Rate = cm->elInfo[2].relativeBits;
+
+ hQC->elementBits[0]->chBitrateEl =
+ fMult(sce1Rate, (FIXP_DBL)(bitrateTot << sc_brTot)) >> sc_brTot;
+ hQC->elementBits[1]->chBitrateEl =
+ fMult(cpeRate, (FIXP_DBL)(bitrateTot << sc_brTot)) >> (sc_brTot + 1);
+ hQC->elementBits[2]->chBitrateEl =
+ fMult(sce2Rate, (FIXP_DBL)(bitrateTot << sc_brTot)) >> sc_brTot;
+
+ hQC->elementBits[0]->maxBitsEl = maxChannelBits;
+ hQC->elementBits[1]->maxBitsEl = 2 * maxChannelBits;
+ hQC->elementBits[2]->maxBitsEl = maxChannelBits;
+ break;
+ }
+ case MODE_1_2_2: {
+ /* sce + cpe + cpe */
+ hQC->elementBits[0]->relativeBitsEl = cm->elInfo[0].relativeBits;
+ hQC->elementBits[1]->relativeBitsEl = cm->elInfo[1].relativeBits;
+ hQC->elementBits[2]->relativeBitsEl = cm->elInfo[2].relativeBits;
+ FIXP_DBL sceRate = cm->elInfo[0].relativeBits;
+ FIXP_DBL cpe1Rate = cm->elInfo[1].relativeBits;
+ FIXP_DBL cpe2Rate = cm->elInfo[2].relativeBits;
+
+ hQC->elementBits[0]->chBitrateEl =
+ fMult(sceRate, (FIXP_DBL)(bitrateTot << sc_brTot)) >> sc_brTot;
+ hQC->elementBits[1]->chBitrateEl =
+ fMult(cpe1Rate, (FIXP_DBL)(bitrateTot << sc_brTot)) >> (sc_brTot + 1);
+ hQC->elementBits[2]->chBitrateEl =
+ fMult(cpe2Rate, (FIXP_DBL)(bitrateTot << sc_brTot)) >> (sc_brTot + 1);
+
+ hQC->elementBits[0]->maxBitsEl = maxChannelBits;
+ hQC->elementBits[1]->maxBitsEl = 2 * maxChannelBits;
+ hQC->elementBits[2]->maxBitsEl = 2 * maxChannelBits;
+ break;
+ }
+ case MODE_1_2_2_1: {
+ /* (5.1) sce + cpe + cpe + lfe */
+ hQC->elementBits[0]->relativeBitsEl = cm->elInfo[0].relativeBits;
+ hQC->elementBits[1]->relativeBitsEl = cm->elInfo[1].relativeBits;
+ hQC->elementBits[2]->relativeBitsEl = cm->elInfo[2].relativeBits;
+ hQC->elementBits[3]->relativeBitsEl = cm->elInfo[3].relativeBits;
+ FIXP_DBL sceRate = cm->elInfo[0].relativeBits;
+ FIXP_DBL cpe1Rate = cm->elInfo[1].relativeBits;
+ FIXP_DBL cpe2Rate = cm->elInfo[2].relativeBits;
+ FIXP_DBL lfeRate = cm->elInfo[3].relativeBits;
+
+ int maxBitsTot =
+ maxChannelBits * 5; /* LFE does not add to bit reservoir */
+ int sc = CountLeadingBits(fixMax(maxChannelBits, averageBitsTot));
+ int maxLfeBits = (int)fMax(
+ (INT)((fMult(lfeRate, (FIXP_DBL)(maxChannelBits << sc)) >> sc) << 1),
+ (INT)((fMult(FL2FXCONST_DBL(1.1f / 2.f),
+ fMult(lfeRate, (FIXP_DBL)(averageBitsTot << sc)))
+ << 1) >>
+ sc));
+
+ maxChannelBits = (maxBitsTot - maxLfeBits);
+ sc = CountLeadingBits(maxChannelBits);
+
+ maxChannelBits =
+ fMult((FIXP_DBL)maxChannelBits << sc, GetInvInt(5)) >> sc;
+
+ hQC->elementBits[0]->chBitrateEl =
+ fMult(sceRate, (FIXP_DBL)(bitrateTot << sc_brTot)) >> sc_brTot;
+ hQC->elementBits[1]->chBitrateEl =
+ fMult(cpe1Rate, (FIXP_DBL)(bitrateTot << sc_brTot)) >> (sc_brTot + 1);
+ hQC->elementBits[2]->chBitrateEl =
+ fMult(cpe2Rate, (FIXP_DBL)(bitrateTot << sc_brTot)) >> (sc_brTot + 1);
+ hQC->elementBits[3]->chBitrateEl =
+ fMult(lfeRate, (FIXP_DBL)(bitrateTot << sc_brTot)) >> sc_brTot;
+
+ hQC->elementBits[0]->maxBitsEl = maxChannelBits;
+ hQC->elementBits[1]->maxBitsEl = 2 * maxChannelBits;
+ hQC->elementBits[2]->maxBitsEl = 2 * maxChannelBits;
+ hQC->elementBits[3]->maxBitsEl = maxLfeBits;
+
+ break;
+ }
+ case MODE_6_1: {
+ /* (6.1) sce + cpe + cpe + sce + lfe */
+ FIXP_DBL sceRate = hQC->elementBits[0]->relativeBitsEl =
+ cm->elInfo[0].relativeBits;
+ FIXP_DBL cpe1Rate = hQC->elementBits[1]->relativeBitsEl =
+ cm->elInfo[1].relativeBits;
+ FIXP_DBL cpe2Rate = hQC->elementBits[2]->relativeBitsEl =
+ cm->elInfo[2].relativeBits;
+ FIXP_DBL sce2Rate = hQC->elementBits[3]->relativeBitsEl =
+ cm->elInfo[3].relativeBits;
+ FIXP_DBL lfeRate = hQC->elementBits[4]->relativeBitsEl =
+ cm->elInfo[4].relativeBits;
+
+ int maxBitsTot =
+ maxChannelBits * 6; /* LFE does not add to bit reservoir */
+ int sc = CountLeadingBits(fixMax(maxChannelBits, averageBitsTot));
+ int maxLfeBits = (int)fMax(
+ (INT)((fMult(lfeRate, (FIXP_DBL)(maxChannelBits << sc)) >> sc) << 1),
+ (INT)((fMult(FL2FXCONST_DBL(1.1f / 2.f),
+ fMult(lfeRate, (FIXP_DBL)(averageBitsTot << sc)))
+ << 1) >>
+ sc));
+
+ maxChannelBits = (maxBitsTot - maxLfeBits) / 6;
+
+ hQC->elementBits[0]->chBitrateEl =
+ fMult(sceRate, (FIXP_DBL)(bitrateTot << sc_brTot)) >> sc_brTot;
+ hQC->elementBits[1]->chBitrateEl =
+ fMult(cpe1Rate, (FIXP_DBL)(bitrateTot << sc_brTot)) >> (sc_brTot + 1);
+ hQC->elementBits[2]->chBitrateEl =
+ fMult(cpe2Rate, (FIXP_DBL)(bitrateTot << sc_brTot)) >> (sc_brTot + 1);
+ hQC->elementBits[3]->chBitrateEl =
+ fMult(sce2Rate, (FIXP_DBL)(bitrateTot << sc_brTot)) >> (sc_brTot + 1);
+ hQC->elementBits[4]->chBitrateEl =
+ fMult(lfeRate, (FIXP_DBL)(bitrateTot << sc_brTot)) >> sc_brTot;
+
+ hQC->elementBits[0]->maxBitsEl = maxChannelBits;
+ hQC->elementBits[1]->maxBitsEl = 2 * maxChannelBits;
+ hQC->elementBits[2]->maxBitsEl = 2 * maxChannelBits;
+ hQC->elementBits[3]->maxBitsEl = maxChannelBits;
+ hQC->elementBits[4]->maxBitsEl = maxLfeBits;
+ break;
+ }
+ case MODE_7_1_TOP_FRONT:
+ case MODE_7_1_BACK:
+ case MODE_7_1_REAR_SURROUND:
+ case MODE_7_1_FRONT_CENTER:
+ case MODE_1_2_2_2_1: {
+ int cpe3Idx = (cm->encMode != MODE_7_1_TOP_FRONT) ? 3 : 4;
+ int lfeIdx = (cm->encMode != MODE_7_1_TOP_FRONT) ? 4 : 3;
+
+ /* (7.1) sce + cpe + cpe + cpe + lfe */
+ FIXP_DBL sceRate = hQC->elementBits[0]->relativeBitsEl =
+ cm->elInfo[0].relativeBits;
+ FIXP_DBL cpe1Rate = hQC->elementBits[1]->relativeBitsEl =
+ cm->elInfo[1].relativeBits;
+ FIXP_DBL cpe2Rate = hQC->elementBits[2]->relativeBitsEl =
+ cm->elInfo[2].relativeBits;
+ FIXP_DBL cpe3Rate = hQC->elementBits[cpe3Idx]->relativeBitsEl =
+ cm->elInfo[cpe3Idx].relativeBits;
+ FIXP_DBL lfeRate = hQC->elementBits[lfeIdx]->relativeBitsEl =
+ cm->elInfo[lfeIdx].relativeBits;
+
+ int maxBitsTot =
+ maxChannelBits * 7; /* LFE does not add to bit reservoir */
+ int sc = CountLeadingBits(fixMax(maxChannelBits, averageBitsTot));
+ int maxLfeBits = (int)fMax(
+ (INT)((fMult(lfeRate, (FIXP_DBL)(maxChannelBits << sc)) >> sc) << 1),
+ (INT)((fMult(FL2FXCONST_DBL(1.1f / 2.f),
+ fMult(lfeRate, (FIXP_DBL)(averageBitsTot << sc)))
+ << 1) >>
+ sc));
+
+ maxChannelBits = (maxBitsTot - maxLfeBits) / 7;
+
+ hQC->elementBits[0]->chBitrateEl =
+ fMult(sceRate, (FIXP_DBL)(bitrateTot << sc_brTot)) >> sc_brTot;
+ hQC->elementBits[1]->chBitrateEl =
+ fMult(cpe1Rate, (FIXP_DBL)(bitrateTot << sc_brTot)) >> (sc_brTot + 1);
+ hQC->elementBits[2]->chBitrateEl =
+ fMult(cpe2Rate, (FIXP_DBL)(bitrateTot << sc_brTot)) >> (sc_brTot + 1);
+ hQC->elementBits[cpe3Idx]->chBitrateEl =
+ fMult(cpe3Rate, (FIXP_DBL)(bitrateTot << sc_brTot)) >> (sc_brTot + 1);
+ hQC->elementBits[lfeIdx]->chBitrateEl =
+ fMult(lfeRate, (FIXP_DBL)(bitrateTot << sc_brTot)) >> sc_brTot;
+
+ hQC->elementBits[0]->maxBitsEl = maxChannelBits;
+ hQC->elementBits[1]->maxBitsEl = 2 * maxChannelBits;
+ hQC->elementBits[2]->maxBitsEl = 2 * maxChannelBits;
+ hQC->elementBits[cpe3Idx]->maxBitsEl = 2 * maxChannelBits;
+ hQC->elementBits[lfeIdx]->maxBitsEl = maxLfeBits;
+ break;
+ }
+
+ default:
+ return AAC_ENC_UNSUPPORTED_CHANNELCONFIG;
+ }
+
+ return AAC_ENC_OK;
+}
+
+/********************************************************************************/
+/* */
+/* function: GetMonoStereoMODE(const CHANNEL_MODE mode) */
+/* */
+/* description: Determines encoder setting from channel mode. */
+/* Multichannel modes are mapped to mono or stereo modes */
+/* returns MODE_MONO in case of mono, */
+/* MODE_STEREO in case of stereo */
+/* MODE_INVALID in case of error */
+/* */
+/* input: CHANNEL_MODE mode: Encoder mode (see qc_data.h). */
+/* output: return: CM_STEREO_MODE monoStereoSetting */
+/* (MODE_INVALID: error, */
+/* MODE_MONO: mono */
+/* MODE_STEREO: stereo). */
+/* */
+/* misc: No memory is allocated. */
+/* */
+/********************************************************************************/
+
+ELEMENT_MODE FDKaacEnc_GetMonoStereoMode(const CHANNEL_MODE mode) {
+ ELEMENT_MODE monoStereoSetting = EL_MODE_INVALID;
+
+ switch (mode) {
+ case MODE_1: /* mono setups */
+ monoStereoSetting = EL_MODE_MONO;
+ break;
+
+ case MODE_2: /* stereo setups */
+ case MODE_1_2:
+ case MODE_1_2_1:
+ case MODE_1_2_2:
+ case MODE_1_2_2_1:
+ case MODE_6_1:
+ case MODE_1_2_2_2_1:
+ case MODE_7_1_REAR_SURROUND:
+ case MODE_7_1_FRONT_CENTER:
+ case MODE_7_1_BACK:
+ case MODE_7_1_TOP_FRONT:
+ monoStereoSetting = EL_MODE_STEREO;
+ break;
+
+ default: /* error */
+ monoStereoSetting = EL_MODE_INVALID;
+ break;
+ }
+
+ return monoStereoSetting;
+}
+
+const CHANNEL_MODE_CONFIG_TAB* FDKaacEnc_GetChannelModeConfiguration(
+ const CHANNEL_MODE mode) {
+ INT i;
+ const CHANNEL_MODE_CONFIG_TAB* cm_config = NULL;
+
+ /* get channel mode config */
+ for (i = 0; i < (INT)sizeof(channelModeConfig) /
+ (INT)sizeof(CHANNEL_MODE_CONFIG_TAB);
+ i++) {
+ if (channelModeConfig[i].encMode == mode) {
+ cm_config = &channelModeConfig[i];
+ break;
+ }
+ }
+ return cm_config;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-09-21 09:52:02 +0000