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Diffstat (limited to 'libAACenc/src/grp_data.cpp')
| -rw-r--r-- | libAACenc/src/grp_data.cpp | 272 |
1 files changed, 0 insertions, 272 deletions
diff --git a/libAACenc/src/grp_data.cpp b/libAACenc/src/grp_data.cpp deleted file mode 100644 index 465865f..0000000 --- a/libAACenc/src/grp_data.cpp +++ /dev/null @@ -1,272 +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 ------------------------------------------------------------------------------------------------------------ */ - -/******************************** MPEG Audio Encoder ************************** - - Initial author: M.Werner - contents/description: Short block grouping - -******************************************************************************/ -#include "psy_const.h" -#include "interface.h" - -/* -* this routine does not work in-place -*/ - -static inline FIXP_DBL nrgAddSaturate(const FIXP_DBL a, const FIXP_DBL b) { - return ( (a>=(FIXP_DBL)MAXVAL_DBL-b) ? (FIXP_DBL)MAXVAL_DBL : (a + b) ); -} - -void -FDKaacEnc_groupShortData(FIXP_DBL *mdctSpectrum, /* in-out */ - SFB_THRESHOLD *sfbThreshold, /* in-out */ - SFB_ENERGY *sfbEnergy, /* in-out */ - SFB_ENERGY *sfbEnergyMS, /* in-out */ - SFB_ENERGY *sfbSpreadEnergy, - const INT sfbCnt, - const INT sfbActive, - const INT *sfbOffset, - const FIXP_DBL *sfbMinSnrLdData, - INT *groupedSfbOffset, /* out */ - INT *maxSfbPerGroup, /* out */ - FIXP_DBL *groupedSfbMinSnrLdData, - const INT noOfGroups, - const INT *groupLen, - const INT granuleLength) -{ - INT i,j; - INT line; /* counts through lines */ - INT sfb; /* counts through scalefactor bands */ - INT grp; /* counts through groups */ - INT wnd; /* counts through windows in a group */ - INT offset; /* needed in sfbOffset grouping */ - INT highestSfb; - - INT granuleLength_short = granuleLength/TRANS_FAC; - - /* for short blocks: regroup spectrum and */ - /* group energies and thresholds according to grouping */ - C_ALLOC_SCRATCH_START(tmpSpectrum, FIXP_DBL, (1024)); - - /* calculate maxSfbPerGroup */ - highestSfb = 0; - for (wnd = 0; wnd < TRANS_FAC; wnd++) - { - for (sfb = sfbActive-1; sfb >= highestSfb; sfb--) - { - for (line = sfbOffset[sfb+1]-1; line >= sfbOffset[sfb]; line--) - { - if ( mdctSpectrum[wnd*granuleLength_short+line] != FL2FXCONST_SPC(0.0) ) break; /* this band is not completely zero */ - } - if (line >= sfbOffset[sfb]) break; /* this band was not completely zero */ - } - highestSfb = fixMax(highestSfb, sfb); - } - highestSfb = highestSfb > 0 ? highestSfb : 0; - *maxSfbPerGroup = highestSfb+1; - - /* calculate groupedSfbOffset */ - i = 0; - offset = 0; - for (grp = 0; grp < noOfGroups; grp++) - { - for (sfb = 0; sfb < sfbActive+1; sfb++) - { - groupedSfbOffset[i++] = offset + sfbOffset[sfb] * groupLen[grp]; - } - i += sfbCnt-sfb; - offset += groupLen[grp] * granuleLength_short; - } - groupedSfbOffset[i++] = granuleLength; - - /* calculate groupedSfbMinSnr */ - i = 0; - for (grp = 0; grp < noOfGroups; grp++) - { - for (sfb = 0; sfb < sfbActive; sfb++) - { - groupedSfbMinSnrLdData[i++] = sfbMinSnrLdData[sfb]; - } - i += sfbCnt-sfb; - } - - /* sum up sfbThresholds */ - wnd = 0; - i = 0; - for (grp = 0; grp < noOfGroups; grp++) - { - for (sfb = 0; sfb < sfbActive; sfb++) - { - FIXP_DBL thresh = sfbThreshold->Short[wnd][sfb]; - for (j=1; j<groupLen[grp]; j++) - { - thresh = nrgAddSaturate(thresh, sfbThreshold->Short[wnd+j][sfb]); - } - sfbThreshold->Long[i++] = thresh; - } - i += sfbCnt-sfb; - wnd += groupLen[grp]; - } - - /* sum up sfbEnergies left/right */ - wnd = 0; - i = 0; - for (grp = 0; grp < noOfGroups; grp++) - { - for (sfb = 0; sfb < sfbActive; sfb++) - { - FIXP_DBL energy = sfbEnergy->Short[wnd][sfb]; - for (j=1; j<groupLen[grp]; j++) - { - energy = nrgAddSaturate(energy, sfbEnergy->Short[wnd+j][sfb]); - } - sfbEnergy->Long[i++] = energy; - } - i += sfbCnt-sfb; - wnd += groupLen[grp]; - } - - /* sum up sfbEnergies mid/side */ - wnd = 0; - i = 0; - for (grp = 0; grp < noOfGroups; grp++) - { - for (sfb = 0; sfb < sfbActive; sfb++) - { - FIXP_DBL energy = sfbEnergyMS->Short[wnd][sfb]; - for (j=1; j<groupLen[grp]; j++) - { - energy = nrgAddSaturate(energy, sfbEnergyMS->Short[wnd+j][sfb]); - } - sfbEnergyMS->Long[i++] = energy; - } - i += sfbCnt-sfb; - wnd += groupLen[grp]; - } - - /* sum up sfbSpreadEnergies */ - wnd = 0; - i = 0; - for (grp = 0; grp < noOfGroups; grp++) - { - for (sfb = 0; sfb < sfbActive; sfb++) - { - FIXP_DBL energy = sfbSpreadEnergy->Short[wnd][sfb]; - for (j=1; j<groupLen[grp]; j++) - { - energy = nrgAddSaturate(energy, sfbSpreadEnergy->Short[wnd+j][sfb]); - } - sfbSpreadEnergy->Long[i++] = energy; - } - i += sfbCnt-sfb; - wnd += groupLen[grp]; - } - - /* re-group spectrum */ - wnd = 0; - i = 0; - for (grp = 0; grp < noOfGroups; grp++) - { - for (sfb = 0; sfb < sfbActive; sfb++) - { - int width = sfbOffset[sfb+1]-sfbOffset[sfb]; - FIXP_DBL *pMdctSpectrum = &mdctSpectrum[sfbOffset[sfb]] + wnd*granuleLength_short; - for (j = 0; j < groupLen[grp]; j++) - { - FIXP_DBL *pTmp = pMdctSpectrum; - for (line = width; line > 0; line--) - { - tmpSpectrum[i++] = *pTmp++; - } - pMdctSpectrum += granuleLength_short; - } - } - i += (groupLen[grp]*(sfbOffset[sfbCnt]-sfbOffset[sfb])); - wnd += groupLen[grp]; - } - - FDKmemcpy(mdctSpectrum, tmpSpectrum, granuleLength*sizeof(FIXP_DBL)); - - C_ALLOC_SCRATCH_END(tmpSpectrum, FIXP_DBL, (1024)) -} |