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Diffstat (limited to 'fdk-aac/libAACenc/src/pnsparam.cpp')
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diff --git a/fdk-aac/libAACenc/src/pnsparam.cpp b/fdk-aac/libAACenc/src/pnsparam.cpp new file mode 100644 index 0000000..a6aab06 --- /dev/null +++ b/fdk-aac/libAACenc/src/pnsparam.cpp @@ -0,0 +1,574 @@ +/* ----------------------------------------------------------------------------- +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): M.Lohwasser + + Description: PNS parameters depending on bitrate and bandwidth + +*******************************************************************************/ + +#include "pnsparam.h" + +#include "psy_configuration.h" + +typedef struct { + SHORT startFreq; + /* Parameters for detection */ + FIXP_SGL refPower; + FIXP_SGL refTonality; + SHORT tnsGainThreshold; /* scaled by TNS_PREDGAIN_SCALE (=1000) */ + SHORT tnsPNSGainThreshold; /* scaled by TNS_PREDGAIN_SCALE (=1000) */ + FIXP_SGL gapFillThr; + SHORT minSfbWidth; + USHORT detectionAlgorithmFlags; +} PNS_INFO_TAB; + +typedef struct { + ULONG brFrom; + ULONG brTo; + UCHAR S16000; + UCHAR S22050; + UCHAR S24000; + UCHAR S32000; + UCHAR S44100; + UCHAR S48000; +} AUTO_PNS_TAB; + +static const AUTO_PNS_TAB levelTable_mono[] = { + { + 0, + 11999, + 0, + 1, + 1, + 1, + 1, + 1, + }, + { + 12000, + 19999, + 0, + 1, + 1, + 1, + 1, + 1, + }, + { + 20000, + 28999, + 0, + 2, + 1, + 1, + 1, + 1, + }, + { + 29000, + 40999, + 0, + 4, + 4, + 4, + 2, + 2, + }, + { + 41000, + 55999, + 0, + 9, + 9, + 7, + 7, + 7, + }, + { + 56000, + 61999, + 0, + 0, + 0, + 0, + 9, + 9, + }, + { + 62000, + 75999, + 0, + 0, + 0, + 0, + 0, + 0, + }, + { + 76000, + 92999, + 0, + 0, + 0, + 0, + 0, + 0, + }, + { + 93000, + 999999, + 0, + 0, + 0, + 0, + 0, + 0, + }, +}; + +static const AUTO_PNS_TAB levelTable_stereo[] = { + { + 0, + 11999, + 0, + 1, + 1, + 1, + 1, + 1, + }, + { + 12000, + 19999, + 0, + 3, + 1, + 1, + 1, + 1, + }, + { + 20000, + 28999, + 0, + 3, + 3, + 3, + 2, + 2, + }, + { + 29000, + 40999, + 0, + 7, + 6, + 6, + 5, + 5, + }, + { + 41000, + 55999, + 0, + 9, + 9, + 7, + 7, + 7, + }, + { + 56000, + 79999, + 0, + 0, + 0, + 0, + 0, + 0, + }, + { + 80000, + 99999, + 0, + 0, + 0, + 0, + 0, + 0, + }, + { + 100000, + 999999, + 0, + 0, + 0, + 0, + 0, + 0, + }, +}; + +static const PNS_INFO_TAB pnsInfoTab[] = { + /*0 pns off */ + /*1*/ {4000, FL2FXCONST_SGL(0.04), FL2FXCONST_SGL(0.06), 1150, 1200, + FL2FXCONST_SGL(0.02), 8, + USE_POWER_DISTRIBUTION | USE_PSYCH_TONALITY | USE_TNS_GAIN_THR | + USE_TNS_PNS /*| JUST_LONG_WINDOW*/}, + /*2*/ + {4000, FL2FXCONST_SGL(0.04), FL2FXCONST_SGL(0.07), 1130, 1300, + FL2FXCONST_SGL(0.05), 8, + USE_POWER_DISTRIBUTION | USE_PSYCH_TONALITY | USE_TNS_GAIN_THR | + USE_TNS_PNS /*| JUST_LONG_WINDOW*/}, + /*3*/ + {4100, FL2FXCONST_SGL(0.04), FL2FXCONST_SGL(0.07), 1100, 1400, + FL2FXCONST_SGL(0.10), 8, + USE_POWER_DISTRIBUTION | USE_PSYCH_TONALITY | USE_TNS_GAIN_THR | + USE_TNS_PNS /*| JUST_LONG_WINDOW*/}, + /*4*/ + {4100, FL2FXCONST_SGL(0.03), FL2FXCONST_SGL(0.10), 1100, 1400, + FL2FXCONST_SGL(0.15), 8, + USE_POWER_DISTRIBUTION | USE_PSYCH_TONALITY | USE_TNS_GAIN_THR | + USE_TNS_PNS /*| JUST_LONG_WINDOW*/}, + /*5*/ + {4300, FL2FXCONST_SGL(0.03), FL2FXCONST_SGL(0.10), 1100, 1400, + FL2FXCONST_SGL(0.15), 8, + USE_POWER_DISTRIBUTION | USE_PSYCH_TONALITY | USE_TNS_GAIN_THR | + USE_TNS_PNS | JUST_LONG_WINDOW}, + /*6*/ + {5000, FL2FXCONST_SGL(0.03), FL2FXCONST_SGL(0.10), 1100, 1400, + FL2FXCONST_SGL(0.25), 8, + USE_POWER_DISTRIBUTION | USE_PSYCH_TONALITY | USE_TNS_GAIN_THR | + USE_TNS_PNS | JUST_LONG_WINDOW}, + /*7*/ + {5500, FL2FXCONST_SGL(0.03), FL2FXCONST_SGL(0.12), 1100, 1400, + FL2FXCONST_SGL(0.35), 8, + USE_POWER_DISTRIBUTION | USE_PSYCH_TONALITY | USE_TNS_GAIN_THR | + USE_TNS_PNS | JUST_LONG_WINDOW}, + /*8*/ + {6000, FL2FXCONST_SGL(0.03), FL2FXCONST_SGL(0.12), 1080, 1400, + FL2FXCONST_SGL(0.40), 8, + USE_POWER_DISTRIBUTION | USE_PSYCH_TONALITY | USE_TNS_GAIN_THR | + USE_TNS_PNS | JUST_LONG_WINDOW}, + /*9*/ + {6000, FL2FXCONST_SGL(0.03), FL2FXCONST_SGL(0.14), 1070, 1400, + FL2FXCONST_SGL(0.45), 8, + USE_POWER_DISTRIBUTION | USE_PSYCH_TONALITY | USE_TNS_GAIN_THR | + USE_TNS_PNS | JUST_LONG_WINDOW}, +}; + +static const AUTO_PNS_TAB levelTable_lowComplexity[] = { + { + 0, + 27999, + 0, + 0, + 0, + 0, + 0, + 0, + }, + { + 28000, + 31999, + 0, + 2, + 2, + 2, + 2, + 2, + }, + { + 32000, + 47999, + 0, + 3, + 3, + 3, + 3, + 3, + }, + { + 48000, + 48000, + 0, + 4, + 4, + 4, + 4, + 4, + }, + { + 48001, + 999999, + 0, + 0, + 0, + 0, + 0, + 0, + }, +}; +/* conversion of old LC tuning tables to new (LD enc) structure (only entries + * which are actually used were converted) */ +static const PNS_INFO_TAB pnsInfoTab_lowComplexity[] = { + /*0 pns off */ + /* DEFAULT parameter set */ + /*1*/ {4100, FL2FXCONST_SGL(0.03), FL2FXCONST_SGL(0.16), 1100, 1400, + FL2FXCONST_SGL(0.5), 16, + USE_POWER_DISTRIBUTION | USE_PSYCH_TONALITY | USE_TNS_GAIN_THR | + USE_TNS_PNS | JUST_LONG_WINDOW}, + /*2*/ + {4100, FL2FXCONST_SGL(0.05), FL2FXCONST_SGL(0.10), 1410, 1400, + FL2FXCONST_SGL(0.5), 16, + USE_POWER_DISTRIBUTION | USE_PSYCH_TONALITY | USE_TNS_GAIN_THR | + USE_TNS_PNS | JUST_LONG_WINDOW}, + /*3*/ + {4100, FL2FXCONST_SGL(0.05), FL2FXCONST_SGL(0.10), 1100, 1400, + FL2FXCONST_SGL(0.5), 16, + USE_POWER_DISTRIBUTION | USE_PSYCH_TONALITY | USE_TNS_GAIN_THR | + USE_TNS_PNS | JUST_LONG_WINDOW}, + /* LOWSUBST -> PNS is used less often than with DEFAULT parameter set (for + br: 48000 - 79999) */ + /*4*/ + {4100, FL2FXCONST_SGL(0.20), FL2FXCONST_SGL(0.10), 1410, 1400, + FL2FXCONST_SGL(0.5), 16, + USE_POWER_DISTRIBUTION | USE_PSYCH_TONALITY | USE_TNS_GAIN_THR | + USE_TNS_PNS | JUST_LONG_WINDOW}, +}; + +/**************************************************************************** + function to look up used pns level +****************************************************************************/ +int FDKaacEnc_lookUpPnsUse(int bitRate, int sampleRate, int numChan, + const int isLC) { + int hUsePns = 0, size, i; + const AUTO_PNS_TAB *levelTable; + + if (isLC) { + levelTable = &levelTable_lowComplexity[0]; + size = sizeof(levelTable_lowComplexity); + } else { /* (E)LD */ + levelTable = (numChan > 1) ? &levelTable_stereo[0] : &levelTable_mono[0]; + size = (numChan > 1) ? sizeof(levelTable_stereo) : sizeof(levelTable_mono); + } + + for (i = 0; i < (int)(size / sizeof(AUTO_PNS_TAB)); i++) { + if (((ULONG)bitRate >= levelTable[i].brFrom) && + ((ULONG)bitRate <= levelTable[i].brTo)) + break; + } + + /* sanity check */ + if ((int)(sizeof(pnsInfoTab) / sizeof(PNS_INFO_TAB)) < i) { + return (PNS_TABLE_ERROR); + } + + switch (sampleRate) { + case 16000: + hUsePns = levelTable[i].S16000; + break; + case 22050: + hUsePns = levelTable[i].S22050; + break; + case 24000: + hUsePns = levelTable[i].S24000; + break; + case 32000: + hUsePns = levelTable[i].S32000; + break; + case 44100: + hUsePns = levelTable[i].S44100; + break; + case 48000: + hUsePns = levelTable[i].S48000; + break; + default: + if (isLC) { + hUsePns = levelTable[i].S48000; + } + break; + } + + return (hUsePns); +} + +/***************************************************************************** + + functionname: FDKaacEnc_GetPnsParam + description: Gets PNS parameters depending on bitrate and bandwidth or + bitsPerLine + returns: error status + input: Noiseparams struct, bitrate, sampling rate, + number of sfb's, pointer to sfb offset + output: PNS parameters + +*****************************************************************************/ +AAC_ENCODER_ERROR FDKaacEnc_GetPnsParam(NOISEPARAMS *np, INT bitRate, + INT sampleRate, INT sfbCnt, + const INT *sfbOffset, INT *usePns, + INT numChan, const INT isLC) { + int i, hUsePns; + const PNS_INFO_TAB *pnsInfo; + + if (*usePns <= 0) return AAC_ENC_OK; + + if (isLC) { + np->detectionAlgorithmFlags = IS_LOW_COMPLEXITY; + + pnsInfo = pnsInfoTab_lowComplexity; + + /* new pns params */ + hUsePns = FDKaacEnc_lookUpPnsUse(bitRate, sampleRate, numChan, isLC); + if (hUsePns == 0) { + *usePns = 0; + return AAC_ENC_OK; + } + + if (hUsePns == PNS_TABLE_ERROR) { + return AAC_ENC_PNS_TABLE_ERROR; + } + + /* select correct row of tuning table */ + pnsInfo += hUsePns - 1; + + } else { + np->detectionAlgorithmFlags = 0; + pnsInfo = pnsInfoTab; + + /* new pns params */ + hUsePns = FDKaacEnc_lookUpPnsUse(bitRate, sampleRate, numChan, isLC); + if (hUsePns == 0) { + *usePns = 0; + return AAC_ENC_OK; + } + if (hUsePns == PNS_TABLE_ERROR) return AAC_ENC_PNS_TABLE_ERROR; + + /* select correct row of tuning table */ + pnsInfo += hUsePns - 1; + } + + np->startSfb = FDKaacEnc_FreqToBandWidthRounding( + pnsInfo->startFreq, sampleRate, sfbCnt, sfbOffset); + + np->detectionAlgorithmFlags |= pnsInfo->detectionAlgorithmFlags; + + np->refPower = FX_SGL2FX_DBL(pnsInfo->refPower); + np->refTonality = FX_SGL2FX_DBL(pnsInfo->refTonality); + np->tnsGainThreshold = pnsInfo->tnsGainThreshold; + np->tnsPNSGainThreshold = pnsInfo->tnsPNSGainThreshold; + np->minSfbWidth = pnsInfo->minSfbWidth; + + np->gapFillThr = + pnsInfo->gapFillThr; /* for LC it is always FL2FXCONST_SGL(0.5) */ + + /* assuming a constant dB/Hz slope in the signal's PSD curve, + the detection threshold needs to be corrected for the width of the band */ + + for (i = 0; i < (sfbCnt - 1); i++) { + INT qtmp, sfbWidth; + FIXP_DBL tmp; + + sfbWidth = sfbOffset[i + 1] - sfbOffset[i]; + + tmp = fPow(np->refPower, 0, sfbWidth, DFRACT_BITS - 1 - 5, &qtmp); + np->powDistPSDcurve[i] = (FIXP_SGL)((LONG)(scaleValue(tmp, qtmp) >> 16)); + } + np->powDistPSDcurve[sfbCnt] = np->powDistPSDcurve[sfbCnt - 1]; + + return AAC_ENC_OK; +} |