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Diffstat (limited to 'fdk-aac/libSBRdec/src/psbitdec.cpp')
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diff --git a/fdk-aac/libSBRdec/src/psbitdec.cpp b/fdk-aac/libSBRdec/src/psbitdec.cpp new file mode 100644 index 0000000..82bb65b --- /dev/null +++ b/fdk-aac/libSBRdec/src/psbitdec.cpp @@ -0,0 +1,594 @@ +/* ----------------------------------------------------------------------------- +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 +----------------------------------------------------------------------------- */ + +/**************************** SBR decoder library ****************************** + + Author(s): + + Description: + +*******************************************************************************/ + +#include "psbitdec.h" + +#include "sbr_rom.h" +#include "huff_dec.h" + +/* PS dec privat functions */ +SBR_ERROR ResetPsDec(HANDLE_PS_DEC h_ps_d); + +/***************************************************************************/ +/*! + \brief huffman decoding by codebook table + + \return index of huffman codebook table + +****************************************************************************/ +static SCHAR decode_huff_cw( + Huffman h, /*!< pointer to huffman codebook table */ + HANDLE_FDK_BITSTREAM hBitBuf, /*!< Handle to Bitbuffer */ + int *length) /*!< length of huffman codeword (or NULL) */ +{ + UCHAR bit = 0; + SCHAR index = 0; + UCHAR bitCount = 0; + + while (index >= 0) { + bit = FDKreadBits(hBitBuf, 1); + bitCount++; + index = h[index][bit]; + } + if (length) { + *length = bitCount; + } + return (index + 64); /* Add offset */ +} + +/***************************************************************************/ +/*! + \brief helper function - limiting of value to min/max values + + \return limited value + +****************************************************************************/ + +static SCHAR limitMinMax(SCHAR i, SCHAR min, SCHAR max) { + if (i < min) + return min; + else if (i > max) + return max; + else + return i; +} + +/***************************************************************************/ +/*! + \brief Decodes delta values in-place and updates + data buffers according to quantization classes. + + When delta coded in frequency the first element is deltacode from zero. + aIndex buffer is decoded from delta values to actual values. + + \return none + +****************************************************************************/ +static void deltaDecodeArray( + SCHAR enable, SCHAR *aIndex, /*!< ICC/IID parameters */ + SCHAR *aPrevFrameIndex, /*!< ICC/IID parameters of previous frame */ + SCHAR DtDf, UCHAR nrElements, /*!< as conveyed in bitstream */ + /*!< output array size: nrElements*stride */ + UCHAR stride, /*!< 1=dflt, 2=half freq. resolution */ + SCHAR minIdx, SCHAR maxIdx) { + int i; + + /* Delta decode */ + if (enable == 1) { + if (DtDf == 0) { /* Delta coded in freq */ + aIndex[0] = 0 + aIndex[0]; + aIndex[0] = limitMinMax(aIndex[0], minIdx, maxIdx); + for (i = 1; i < nrElements; i++) { + aIndex[i] = aIndex[i - 1] + aIndex[i]; + aIndex[i] = limitMinMax(aIndex[i], minIdx, maxIdx); + } + } else { /* Delta time */ + for (i = 0; i < nrElements; i++) { + aIndex[i] = aPrevFrameIndex[i * stride] + aIndex[i]; + aIndex[i] = limitMinMax(aIndex[i], minIdx, maxIdx); + } + } + } else { /* No data is sent, set index to zero */ + for (i = 0; i < nrElements; i++) { + aIndex[i] = 0; + } + } + if (stride == 2) { + for (i = nrElements * stride - 1; i > 0; i--) { + aIndex[i] = aIndex[i >> 1]; + } + } +} + +/***************************************************************************/ +/*! + \brief Mapping of ICC/IID parameters to 20 stereo bands + + \return none + +****************************************************************************/ +static void map34IndexTo20(SCHAR *aIndex, /*!< decoded ICC/IID parameters */ + UCHAR noBins) /*!< number of stereo bands */ +{ + aIndex[0] = (2 * aIndex[0] + aIndex[1]) / 3; + aIndex[1] = (aIndex[1] + 2 * aIndex[2]) / 3; + aIndex[2] = (2 * aIndex[3] + aIndex[4]) / 3; + aIndex[3] = (aIndex[4] + 2 * aIndex[5]) / 3; + aIndex[4] = (aIndex[6] + aIndex[7]) / 2; + aIndex[5] = (aIndex[8] + aIndex[9]) / 2; + aIndex[6] = aIndex[10]; + aIndex[7] = aIndex[11]; + aIndex[8] = (aIndex[12] + aIndex[13]) / 2; + aIndex[9] = (aIndex[14] + aIndex[15]) / 2; + aIndex[10] = aIndex[16]; + /* For IPD/OPD it stops here */ + + if (noBins == NO_HI_RES_BINS) { + aIndex[11] = aIndex[17]; + aIndex[12] = aIndex[18]; + aIndex[13] = aIndex[19]; + aIndex[14] = (aIndex[20] + aIndex[21]) / 2; + aIndex[15] = (aIndex[22] + aIndex[23]) / 2; + aIndex[16] = (aIndex[24] + aIndex[25]) / 2; + aIndex[17] = (aIndex[26] + aIndex[27]) / 2; + aIndex[18] = (aIndex[28] + aIndex[29] + aIndex[30] + aIndex[31]) / 4; + aIndex[19] = (aIndex[32] + aIndex[33]) / 2; + } +} + +/***************************************************************************/ +/*! + \brief Decodes delta coded IID, ICC, IPD and OPD indices + + \return PS processing flag. If set to 1 + +****************************************************************************/ +int DecodePs(struct PS_DEC *h_ps_d, /*!< PS handle */ + const UCHAR frameError, /*!< Flag telling that frame had errors */ + PS_DEC_COEFFICIENTS *pScratch) { + MPEG_PS_BS_DATA *pBsData; + UCHAR gr, env; + int bPsHeaderValid, bPsDataAvail; + + /* Assign Scratch */ + h_ps_d->specificTo.mpeg.pCoef = pScratch; + + /* Shortcuts to avoid deferencing and keep the code readable */ + pBsData = &h_ps_d->bsData[h_ps_d->processSlot].mpeg; + bPsHeaderValid = pBsData->bPsHeaderValid; + bPsDataAvail = + (h_ps_d->bPsDataAvail[h_ps_d->processSlot] == ppt_mpeg) ? 1 : 0; + + /*************************************************************************************** + * Decide whether to process or to conceal PS data or not. */ + + if ((h_ps_d->psDecodedPrv && !frameError && !bPsDataAvail) || + (!h_ps_d->psDecodedPrv && + (frameError || !bPsDataAvail || !bPsHeaderValid))) { + /* Don't apply PS processing. + * Declare current PS header and bitstream data invalid. */ + pBsData->bPsHeaderValid = 0; + h_ps_d->bPsDataAvail[h_ps_d->processSlot] = ppt_none; + return (0); + } + + if (frameError || + !bPsHeaderValid) { /* no new PS data available (e.g. frame loss) */ + /* => keep latest data constant (i.e. FIX with noEnv=0) */ + pBsData->noEnv = 0; + } + + /*************************************************************************************** + * Decode bitstream payload or prepare parameter for concealment: + */ + for (env = 0; env < pBsData->noEnv; env++) { + SCHAR *aPrevIidIndex; + SCHAR *aPrevIccIndex; + + UCHAR noIidSteps = pBsData->bFineIidQ ? NO_IID_STEPS_FINE : NO_IID_STEPS; + + if (env == 0) { + aPrevIidIndex = h_ps_d->specificTo.mpeg.aIidPrevFrameIndex; + aPrevIccIndex = h_ps_d->specificTo.mpeg.aIccPrevFrameIndex; + } else { + aPrevIidIndex = pBsData->aaIidIndex[env - 1]; + aPrevIccIndex = pBsData->aaIccIndex[env - 1]; + } + + deltaDecodeArray(pBsData->bEnableIid, pBsData->aaIidIndex[env], + aPrevIidIndex, pBsData->abIidDtFlag[env], + FDK_sbrDecoder_aNoIidBins[pBsData->freqResIid], + (pBsData->freqResIid) ? 1 : 2, -noIidSteps, noIidSteps); + + deltaDecodeArray(pBsData->bEnableIcc, pBsData->aaIccIndex[env], + aPrevIccIndex, pBsData->abIccDtFlag[env], + FDK_sbrDecoder_aNoIccBins[pBsData->freqResIcc], + (pBsData->freqResIcc) ? 1 : 2, 0, NO_ICC_STEPS - 1); + } /* for (env=0; env<pBsData->noEnv; env++) */ + + /* handling of FIX noEnv=0 */ + if (pBsData->noEnv == 0) { + /* set noEnv=1, keep last parameters or force 0 if not enabled */ + pBsData->noEnv = 1; + + if (pBsData->bEnableIid) { + pBsData->bFineIidQ = h_ps_d->specificTo.mpeg.bPrevFrameFineIidQ; + pBsData->freqResIid = h_ps_d->specificTo.mpeg.prevFreqResIid; + for (gr = 0; gr < NO_HI_RES_IID_BINS; gr++) { + pBsData->aaIidIndex[pBsData->noEnv - 1][gr] = + h_ps_d->specificTo.mpeg.aIidPrevFrameIndex[gr]; + } + } else { + for (gr = 0; gr < NO_HI_RES_IID_BINS; gr++) { + pBsData->aaIidIndex[pBsData->noEnv - 1][gr] = 0; + } + } + + if (pBsData->bEnableIcc) { + pBsData->freqResIcc = h_ps_d->specificTo.mpeg.prevFreqResIcc; + for (gr = 0; gr < NO_HI_RES_ICC_BINS; gr++) { + pBsData->aaIccIndex[pBsData->noEnv - 1][gr] = + h_ps_d->specificTo.mpeg.aIccPrevFrameIndex[gr]; + } + } else { + for (gr = 0; gr < NO_HI_RES_ICC_BINS; gr++) { + pBsData->aaIccIndex[pBsData->noEnv - 1][gr] = 0; + } + } + } + + /* Update previous frame Iid quantization */ + h_ps_d->specificTo.mpeg.bPrevFrameFineIidQ = pBsData->bFineIidQ; + + /* Update previous frequency resolution for IID */ + h_ps_d->specificTo.mpeg.prevFreqResIid = pBsData->freqResIid; + + /* Update previous frequency resolution for ICC */ + h_ps_d->specificTo.mpeg.prevFreqResIcc = pBsData->freqResIcc; + + /* Update previous frame index buffers */ + for (gr = 0; gr < NO_HI_RES_IID_BINS; gr++) { + h_ps_d->specificTo.mpeg.aIidPrevFrameIndex[gr] = + pBsData->aaIidIndex[pBsData->noEnv - 1][gr]; + } + for (gr = 0; gr < NO_HI_RES_ICC_BINS; gr++) { + h_ps_d->specificTo.mpeg.aIccPrevFrameIndex[gr] = + pBsData->aaIccIndex[pBsData->noEnv - 1][gr]; + } + + /* PS data from bitstream (if avail) was decoded now */ + h_ps_d->bPsDataAvail[h_ps_d->processSlot] = ppt_none; + + /* handling of env borders for FIX & VAR */ + if (pBsData->bFrameClass == 0) { + /* FIX_BORDERS NoEnv=0,1,2,4 */ + pBsData->aEnvStartStop[0] = 0; + for (env = 1; env < pBsData->noEnv; env++) { + pBsData->aEnvStartStop[env] = + (env * h_ps_d->noSubSamples) / pBsData->noEnv; + } + pBsData->aEnvStartStop[pBsData->noEnv] = h_ps_d->noSubSamples; + /* 1024 (32 slots) env borders: 0, 8, 16, 24, 32 */ + /* 960 (30 slots) env borders: 0, 7, 15, 22, 30 */ + } else { /* if (h_ps_d->bFrameClass == 0) */ + /* VAR_BORDERS NoEnv=1,2,3,4 */ + pBsData->aEnvStartStop[0] = 0; + + /* handle case aEnvStartStop[noEnv]<noSubSample for VAR_BORDERS by + duplicating last PS parameters and incrementing noEnv */ + if (pBsData->aEnvStartStop[pBsData->noEnv] < h_ps_d->noSubSamples) { + for (gr = 0; gr < NO_HI_RES_IID_BINS; gr++) { + pBsData->aaIidIndex[pBsData->noEnv][gr] = + pBsData->aaIidIndex[pBsData->noEnv - 1][gr]; + } + for (gr = 0; gr < NO_HI_RES_ICC_BINS; gr++) { + pBsData->aaIccIndex[pBsData->noEnv][gr] = + pBsData->aaIccIndex[pBsData->noEnv - 1][gr]; + } + pBsData->noEnv++; + pBsData->aEnvStartStop[pBsData->noEnv] = h_ps_d->noSubSamples; + } + + /* enforce strictly monotonic increasing borders */ + for (env = 1; env < pBsData->noEnv; env++) { + UCHAR thr; + thr = (UCHAR)h_ps_d->noSubSamples - (pBsData->noEnv - env); + if (pBsData->aEnvStartStop[env] > thr) { + pBsData->aEnvStartStop[env] = thr; + } else { + thr = pBsData->aEnvStartStop[env - 1] + 1; + if (pBsData->aEnvStartStop[env] < thr) { + pBsData->aEnvStartStop[env] = thr; + } + } + } + } /* if (h_ps_d->bFrameClass == 0) ... else */ + + /* copy data prior to possible 20<->34 in-place mapping */ + for (env = 0; env < pBsData->noEnv; env++) { + UCHAR i; + for (i = 0; i < NO_HI_RES_IID_BINS; i++) { + h_ps_d->specificTo.mpeg.pCoef->aaIidIndexMapped[env][i] = + pBsData->aaIidIndex[env][i]; + } + for (i = 0; i < NO_HI_RES_ICC_BINS; i++) { + h_ps_d->specificTo.mpeg.pCoef->aaIccIndexMapped[env][i] = + pBsData->aaIccIndex[env][i]; + } + } + + /* MPEG baseline PS */ + /* Baseline version of PS always uses the hybrid filter structure with 20 + * stereo bands. */ + /* If ICC/IID parameters for 34 stereo bands are decoded they have to be + * mapped to 20 */ + /* stereo bands. */ + /* Additionaly the IPD/OPD parameters won't be used. */ + + for (env = 0; env < pBsData->noEnv; env++) { + if (pBsData->freqResIid == 2) + map34IndexTo20(h_ps_d->specificTo.mpeg.pCoef->aaIidIndexMapped[env], + NO_HI_RES_IID_BINS); + if (pBsData->freqResIcc == 2) + map34IndexTo20(h_ps_d->specificTo.mpeg.pCoef->aaIccIndexMapped[env], + NO_HI_RES_ICC_BINS); + + /* IPD/OPD is disabled in baseline version and thus was removed here */ + } + + return (1); +} + +/***************************************************************************/ +/*! + + \brief Reads parametric stereo data from bitstream + + \return + +****************************************************************************/ +unsigned int ReadPsData( + HANDLE_PS_DEC h_ps_d, /*!< handle to struct PS_DEC */ + HANDLE_FDK_BITSTREAM hBitBuf, /*!< handle to struct BIT_BUF */ + int nBitsLeft /*!< max number of bits available */ +) { + MPEG_PS_BS_DATA *pBsData; + + UCHAR gr, env; + SCHAR dtFlag; + INT startbits; + Huffman CurrentTable; + SCHAR bEnableHeader; + + if (!h_ps_d) return 0; + + pBsData = &h_ps_d->bsData[h_ps_d->bsReadSlot].mpeg; + + if (h_ps_d->bsReadSlot != h_ps_d->bsLastSlot) { + /* Copy last header data */ + FDKmemcpy(pBsData, &h_ps_d->bsData[h_ps_d->bsLastSlot].mpeg, + sizeof(MPEG_PS_BS_DATA)); + } + + startbits = (INT)FDKgetValidBits(hBitBuf); + + bEnableHeader = (SCHAR)FDKreadBits(hBitBuf, 1); + + /* Read header */ + if (bEnableHeader) { + pBsData->bPsHeaderValid = 1; + pBsData->bEnableIid = (UCHAR)FDKreadBits(hBitBuf, 1); + if (pBsData->bEnableIid) { + pBsData->modeIid = (UCHAR)FDKreadBits(hBitBuf, 3); + } + + pBsData->bEnableIcc = (UCHAR)FDKreadBits(hBitBuf, 1); + if (pBsData->bEnableIcc) { + pBsData->modeIcc = (UCHAR)FDKreadBits(hBitBuf, 3); + } + + pBsData->bEnableExt = (UCHAR)FDKreadBits(hBitBuf, 1); + } + + pBsData->bFrameClass = (UCHAR)FDKreadBits(hBitBuf, 1); + if (pBsData->bFrameClass == 0) { + /* FIX_BORDERS NoEnv=0,1,2,4 */ + pBsData->noEnv = + FDK_sbrDecoder_aFixNoEnvDecode[(UCHAR)FDKreadBits(hBitBuf, 2)]; + /* all additional handling of env borders is now in DecodePs() */ + } else { + /* VAR_BORDERS NoEnv=1,2,3,4 */ + pBsData->noEnv = 1 + (UCHAR)FDKreadBits(hBitBuf, 2); + for (env = 1; env < pBsData->noEnv + 1; env++) + pBsData->aEnvStartStop[env] = ((UCHAR)FDKreadBits(hBitBuf, 5)) + 1; + /* all additional handling of env borders is now in DecodePs() */ + } + + /* verify that IID & ICC modes (quant grid, freq res) are supported */ + if ((pBsData->modeIid > 5) || (pBsData->modeIcc > 5)) { + /* no useful PS data could be read from bitstream */ + h_ps_d->bPsDataAvail[h_ps_d->bsReadSlot] = ppt_none; + /* discard all remaining bits */ + nBitsLeft -= startbits - (INT)FDKgetValidBits(hBitBuf); + while (nBitsLeft > 0) { + int i = nBitsLeft; + if (i > 8) { + i = 8; + } + FDKreadBits(hBitBuf, i); + nBitsLeft -= i; + } + return (UINT)(startbits - (INT)FDKgetValidBits(hBitBuf)); + } + + if (pBsData->modeIid > 2) { + pBsData->freqResIid = pBsData->modeIid - 3; + pBsData->bFineIidQ = 1; + } else { + pBsData->freqResIid = pBsData->modeIid; + pBsData->bFineIidQ = 0; + } + + if (pBsData->modeIcc > 2) { + pBsData->freqResIcc = pBsData->modeIcc - 3; + } else { + pBsData->freqResIcc = pBsData->modeIcc; + } + + /* Extract IID data */ + if (pBsData->bEnableIid) { + for (env = 0; env < pBsData->noEnv; env++) { + dtFlag = (SCHAR)FDKreadBits(hBitBuf, 1); + if (!dtFlag) { + if (pBsData->bFineIidQ) + CurrentTable = (Huffman)&aBookPsIidFineFreqDecode; + else + CurrentTable = (Huffman)&aBookPsIidFreqDecode; + } else { + if (pBsData->bFineIidQ) + CurrentTable = (Huffman)&aBookPsIidFineTimeDecode; + else + CurrentTable = (Huffman)&aBookPsIidTimeDecode; + } + + for (gr = 0; gr < FDK_sbrDecoder_aNoIidBins[pBsData->freqResIid]; gr++) + pBsData->aaIidIndex[env][gr] = + decode_huff_cw(CurrentTable, hBitBuf, NULL); + pBsData->abIidDtFlag[env] = dtFlag; + } + } + + /* Extract ICC data */ + if (pBsData->bEnableIcc) { + for (env = 0; env < pBsData->noEnv; env++) { + dtFlag = (SCHAR)FDKreadBits(hBitBuf, 1); + if (!dtFlag) + CurrentTable = (Huffman)&aBookPsIccFreqDecode; + else + CurrentTable = (Huffman)&aBookPsIccTimeDecode; + + for (gr = 0; gr < FDK_sbrDecoder_aNoIccBins[pBsData->freqResIcc]; gr++) + pBsData->aaIccIndex[env][gr] = + decode_huff_cw(CurrentTable, hBitBuf, NULL); + pBsData->abIccDtFlag[env] = dtFlag; + } + } + + if (pBsData->bEnableExt) { + /*! + Decoders that support only the baseline version of the PS tool are allowed + to ignore the IPD/OPD data, but according header data has to be parsed. + ISO/IEC 14496-3 Subpart 8 Annex 4 + */ + + int cnt = FDKreadBits(hBitBuf, PS_EXTENSION_SIZE_BITS); + if (cnt == (1 << PS_EXTENSION_SIZE_BITS) - 1) { + cnt += FDKreadBits(hBitBuf, PS_EXTENSION_ESC_COUNT_BITS); + } + while (cnt--) FDKreadBits(hBitBuf, 8); + } + + /* new PS data was read from bitstream */ + h_ps_d->bPsDataAvail[h_ps_d->bsReadSlot] = ppt_mpeg; + + return (startbits - (INT)FDKgetValidBits(hBitBuf)); +} |