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Diffstat (limited to 'libAACenc/src/bandwidth.cpp')
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diff --git a/libAACenc/src/bandwidth.cpp b/libAACenc/src/bandwidth.cpp deleted file mode 100644 index 703658b..0000000 --- a/libAACenc/src/bandwidth.cpp +++ /dev/null @@ -1,381 +0,0 @@ - -/* ----------------------------------------------------------------------------------------------------------- -Software License for The Fraunhofer FDK AAC Codec Library for Android - -© Copyright 1995 - 2013 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 ------------------------------------------------------------------------------------------------------------ */ - -/************************* Fast MPEG AAC Audio Encoder ********************** - - Initial author: M. Schug / A. Groeschel - contents/description: bandwidth expert - -******************************************************************************/ - -#include "channel_map.h" -#include "bandwidth.h" -#include "aacEnc_ram.h" - -typedef struct{ - INT chanBitRate; - INT bandWidthMono; - INT bandWidth2AndMoreChan; - -} BANDWIDTH_TAB; - -static const BANDWIDTH_TAB bandWidthTable[] = { - {0, 3700, 5000}, - {12000, 5000, 6400}, - {20000, 6900, 9640}, - {28000, 9600, 13050}, - {40000, 12060, 14260}, - {56000, 13950, 15500}, - {72000, 14200, 16120}, - {96000, 17000, 17000}, - {576001,17000, 17000} -}; - - -static const BANDWIDTH_TAB bandWidthTable_LD_22050[] = { - { 8000, 2000, 2400}, - {12000, 2500, 2700}, - {16000, 3300, 3100}, - {24000, 6250, 7200}, - {32000, 9200, 10500}, - {40000, 16000, 16000}, - {48000, 16000, 16000}, - {360001, 16000, 16000} -}; - -static const BANDWIDTH_TAB bandWidthTable_LD_24000[] = { - { 8000, 2000, 2000}, - {12000, 2000, 2300}, - {16000, 2200, 2500}, - {24000, 5650, 6400}, - {32000, 11600, 12000}, - {40000, 12000, 16000}, - {48000, 16000, 16000}, - {64000, 16000, 16000}, - {360001, 16000, 16000} -}; - -static const BANDWIDTH_TAB bandWidthTable_LD_32000[] = { - { 8000, 2000, 2000}, - {12000, 2000, 2000}, - {24000, 4250, 5200}, - {32000, 8400, 9000}, - {40000, 9400, 11300}, - {48000, 11900, 13700}, - {64000, 14800, 16000}, - {76000, 16000, 16000}, - {360001, 16000, 16000} -}; - -static const BANDWIDTH_TAB bandWidthTable_LD_44100[] = { - { 8000, 2000, 2000}, - {24000, 2000, 2000}, - {32000, 4400, 5700}, - {40000, 7400, 8800}, - {48000, 9000, 10700}, - {56000, 11000, 12900}, - {64000, 14400, 15500}, - {80000, 16000, 16200}, - {96000, 16500, 16000}, - {128000, 16000, 16000}, - {360001, 16000, 16000} -}; - -static const BANDWIDTH_TAB bandWidthTable_LD_48000[] = { - { 8000, 2000, 2000}, - {24000, 2000, 2000}, - {32000, 4400, 5700}, - {40000, 7400, 8800}, - {48000, 9000, 10700}, - {56000, 11000, 12800}, - {64000, 14300, 15400}, - {80000, 16000, 16200}, - {96000, 16500, 16000}, - {128000, 16000, 16000}, - {360001, 16000, 16000} -}; - -typedef struct{ - AACENC_BITRATE_MODE bitrateMode; - int bandWidthMono; - int bandWidth2AndMoreChan; -} BANDWIDTH_TAB_VBR; - -static const BANDWIDTH_TAB_VBR bandWidthTableVBR[]= { - {AACENC_BR_MODE_CBR, 0, 0}, - {AACENC_BR_MODE_VBR_1, 13050, 13050}, - {AACENC_BR_MODE_VBR_2, 13050, 13050}, - {AACENC_BR_MODE_VBR_3, 14260, 14260}, - {AACENC_BR_MODE_VBR_4, 15500, 15500}, - {AACENC_BR_MODE_VBR_5, 48000, 48000}, - {AACENC_BR_MODE_SFR, 0, 0}, - {AACENC_BR_MODE_FF, 0, 0} - -}; - -static INT GetBandwidthEntry( - const INT frameLength, - const INT sampleRate, - const INT chanBitRate, - const INT entryNo) -{ - INT bandwidth = -1; - const BANDWIDTH_TAB *pBwTab = NULL; - INT bwTabSize = 0; - - switch (frameLength) { - case 960: - case 1024: - pBwTab = bandWidthTable; - bwTabSize = sizeof(bandWidthTable)/sizeof(BANDWIDTH_TAB); - break; - case 480: - case 512: - switch (sampleRate) { - case 8000: - case 11025: - case 12000: - case 16000: - case 22050: - pBwTab = bandWidthTable_LD_22050; - bwTabSize = sizeof(bandWidthTable_LD_22050)/sizeof(BANDWIDTH_TAB); - break; - case 24000: - pBwTab = bandWidthTable_LD_24000; - bwTabSize = sizeof(bandWidthTable_LD_24000)/sizeof(BANDWIDTH_TAB); - break; - case 32000: - pBwTab = bandWidthTable_LD_32000; - bwTabSize = sizeof(bandWidthTable_LD_32000)/sizeof(BANDWIDTH_TAB); - break; - case (44100): - pBwTab = bandWidthTable_LD_44100; - bwTabSize = sizeof(bandWidthTable_LD_44100)/sizeof(BANDWIDTH_TAB); - break; - case 48000: - case 64000: - case 88200: - case 96000: - pBwTab = bandWidthTable_LD_48000; - bwTabSize = sizeof(bandWidthTable_LD_48000)/sizeof(BANDWIDTH_TAB); - break; - } - break; - default: - pBwTab = NULL; - bwTabSize = 0; - } - - if (pBwTab!=NULL) { - int i; - for (i=0; i<bwTabSize-1; i++) { - if (chanBitRate >= pBwTab[i].chanBitRate && - chanBitRate < pBwTab[i+1].chanBitRate) - { - switch (frameLength) { - case 960: - case 1024: - bandwidth = (entryNo==0) - ? pBwTab[i].bandWidthMono - : pBwTab[i].bandWidth2AndMoreChan; - break; - case 480: - case 512: - { - INT q_res = 0; - INT startBw = (entryNo==0) ? pBwTab[i ].bandWidthMono : pBwTab[i ].bandWidth2AndMoreChan; - INT endBw = (entryNo==0) ? pBwTab[i+1].bandWidthMono : pBwTab[i+1].bandWidth2AndMoreChan; - INT startBr = pBwTab[i].chanBitRate; - INT endBr = pBwTab[i+1].chanBitRate; - - FIXP_DBL bwFac_fix = fDivNorm(chanBitRate-startBr, endBr-startBr, &q_res); - bandwidth = (INT)scaleValue(fMult(bwFac_fix, (FIXP_DBL)(endBw-startBw)),q_res) + startBw; - } - break; - default: - bandwidth = -1; - } - break; - } /* within bitrate range */ - } - } /* pBwTab!=NULL */ - - return bandwidth; -} - - -AAC_ENCODER_ERROR FDKaacEnc_DetermineBandWidth(INT* bandWidth, - INT proposedBandWidth, - INT bitrate, - AACENC_BITRATE_MODE bitrateMode, - INT sampleRate, - INT frameLength, - CHANNEL_MAPPING* cm, - CHANNEL_MODE encoderMode) -{ - AAC_ENCODER_ERROR ErrorStatus = AAC_ENC_OK; - INT chanBitRate = bitrate/cm->nChannels; - - /* vbr */ - switch(bitrateMode){ - case AACENC_BR_MODE_VBR_1: - case AACENC_BR_MODE_VBR_2: - case AACENC_BR_MODE_VBR_3: - case AACENC_BR_MODE_VBR_4: - case AACENC_BR_MODE_VBR_5: - if (proposedBandWidth != 0){ - /* use given bw */ - *bandWidth = proposedBandWidth; - } else { - /* take bw from table */ - switch(encoderMode){ - case MODE_1: - *bandWidth = bandWidthTableVBR[bitrateMode].bandWidthMono; - break; - case MODE_2: - case MODE_1_2: - case MODE_1_2_1: - case MODE_1_2_2: - case MODE_1_2_2_1: - case MODE_1_2_2_2_1: - case MODE_7_1_REAR_SURROUND: - case MODE_7_1_FRONT_CENTER: - *bandWidth = bandWidthTableVBR[bitrateMode].bandWidth2AndMoreChan; - break; - default: - return AAC_ENC_UNSUPPORTED_CHANNELCONFIG; - } - } - break; - case AACENC_BR_MODE_CBR: - case AACENC_BR_MODE_SFR: - case AACENC_BR_MODE_FF: - - /* bandwidth limiting */ - if (proposedBandWidth != 0) { - *bandWidth = FDKmin(proposedBandWidth, FDKmin(20000, sampleRate>>1)); - } - else { /* search reasonable bandwidth */ - - int entryNo = 0; - - switch(encoderMode){ - case MODE_1: /* mono */ - entryNo = 0; /* use mono bandwith settings */ - break; - - case MODE_2: /* stereo */ - case MODE_1_2: /* sce + cpe */ - case MODE_1_2_1: /* sce + cpe + sce */ - case MODE_1_2_2: /* sce + cpe + cpe */ - case MODE_1_2_2_1: /* (5.1) sce + cpe + cpe + lfe */ - case MODE_1_2_2_2_1: /* (7.1) sce + cpe + cpe + cpe + lfe */ - case MODE_7_1_REAR_SURROUND: - case MODE_7_1_FRONT_CENTER: - entryNo = 1; /* use stereo bandwith settings */ - break; - - default: - return AAC_ENC_UNSUPPORTED_CHANNELCONFIG; - } - - *bandWidth = GetBandwidthEntry( - frameLength, - sampleRate, - chanBitRate, - entryNo); - - if (*bandWidth==-1) { - ErrorStatus = AAC_ENC_INVALID_CHANNEL_BITRATE; - } - } - break; - default: - *bandWidth = 0; - return AAC_ENC_UNSUPPORTED_BITRATE_MODE; - } - - *bandWidth = FDKmin(*bandWidth, sampleRate/2); - - return ErrorStatus;; -} |