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Diffstat (limited to 'media/libstagefright/codecs/aacdec/ps_read_data.cpp')
| -rw-r--r-- | media/libstagefright/codecs/aacdec/ps_read_data.cpp | 388 |
1 files changed, 388 insertions, 0 deletions
diff --git a/media/libstagefright/codecs/aacdec/ps_read_data.cpp b/media/libstagefright/codecs/aacdec/ps_read_data.cpp new file mode 100644 index 0000000..c49eb3d --- /dev/null +++ b/media/libstagefright/codecs/aacdec/ps_read_data.cpp @@ -0,0 +1,388 @@ +/* ------------------------------------------------------------------ + * Copyright (C) 1998-2009 PacketVideo + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either + * express or implied. + * See the License for the specific language governing permissions + * and limitations under the License. + * ------------------------------------------------------------------- + */ +/* + + Filename: ps_read_data.c + + +------------------------------------------------------------------------------ + REVISION HISTORY + + + Who: Date: MM/DD/YYYY + Description: + +------------------------------------------------------------------------------ + INPUT AND OUTPUT DEFINITIONS + + + +------------------------------------------------------------------------------ + FUNCTION DESCRIPTION + + Decodes parametric stereo + +------------------------------------------------------------------------------ + REQUIREMENTS + + +------------------------------------------------------------------------------ + REFERENCES + +SC 29 Software Copyright Licencing Disclaimer: + +This software module was originally developed by + Coding Technologies + +and edited by + - + +in the course of development of the ISO/IEC 13818-7 and ISO/IEC 14496-3 +standards for reference purposes and its performance may not have been +optimized. This software module is an implementation of one or more tools as +specified by the ISO/IEC 13818-7 and ISO/IEC 14496-3 standards. +ISO/IEC gives users free license to this software module or modifications +thereof for use in products claiming conformance to audiovisual and +image-coding related ITU Recommendations and/or ISO/IEC International +Standards. ISO/IEC gives users the same free license to this software module or +modifications thereof for research purposes and further ISO/IEC standardisation. +Those intending to use this software module in products are advised that its +use may infringe existing patents. ISO/IEC have no liability for use of this +software module or modifications thereof. Copyright is not released for +products that do not conform to audiovisual and image-coding related ITU +Recommendations and/or ISO/IEC International Standards. +The original developer retains full right to modify and use the code for its +own purpose, assign or donate the code to a third party and to inhibit third +parties from using the code for products that do not conform to audiovisual and +image-coding related ITU Recommendations and/or ISO/IEC International Standards. +This copyright notice must be included in all copies or derivative works. +Copyright (c) ISO/IEC 2003. + +------------------------------------------------------------------------------ + PSEUDO-CODE + +------------------------------------------------------------------------------ +*/ + + +/*---------------------------------------------------------------------------- +; INCLUDES +----------------------------------------------------------------------------*/ + +#ifdef AAC_PLUS + +#ifdef PARAMETRICSTEREO + +#include "pv_audio_type_defs.h" +#include "buf_getbits.h" +#include "s_bit_buffer.h" +#include "s_huffman.h" +#include "aac_mem_funcs.h" +#include "s_ps_dec.h" +#include "sbr_decode_huff_cw.h" +#include "ps_decode_bs_utils.h" +#include "ps_bstr_decoding.h" +#include "ps_read_data.h" +/*---------------------------------------------------------------------------- +; MACROS +; Define module specific macros here +----------------------------------------------------------------------------*/ + + +/*---------------------------------------------------------------------------- +; DEFINES +; Include all pre-processor statements here. Include conditional +; compile variables also. +----------------------------------------------------------------------------*/ + +/*---------------------------------------------------------------------------- +; LOCAL FUNCTION DEFINITIONS +; Function Prototype declaration +----------------------------------------------------------------------------*/ + +/*---------------------------------------------------------------------------- +; LOCAL STORE/BUFFER/POINTER DEFINITIONS +; Variable declaration - defined here and used outside this module +----------------------------------------------------------------------------*/ + + +/*---------------------------------------------------------------------------- +; EXTERNAL FUNCTION REFERENCES +; Declare functions defined elsewhere and referenced in this module +----------------------------------------------------------------------------*/ + + +/*---------------------------------------------------------------------------- +; EXTERNAL GLOBAL STORE/BUFFER/POINTER REFERENCES +; Declare variables used in this module but defined elsewhere +----------------------------------------------------------------------------*/ + +/* IID & ICC Huffman codebooks */ +const Char aBookPsIidTimeDecode[28][2] = +{ + { -64, 1 }, { -65, 2 }, { -63, 3 }, { -66, 4 }, + { -62, 5 }, { -67, 6 }, { -61, 7 }, { -68, 8 }, + { -60, 9 }, { -69, 10 }, { -59, 11 }, { -70, 12 }, + { -58, 13 }, { -57, 14 }, { -71, 15 }, { 16, 17 }, + { -56, -72 }, { 18, 21 }, { 19, 20 }, { -55, -78 }, + { -77, -76 }, { 22, 25 }, { 23, 24 }, { -75, -74 }, + { -73, -54 }, { 26, 27 }, { -53, -52 }, { -51, -50 } +}; + +const Char aBookPsIidFreqDecode[28][2] = +{ + { -64, 1 }, { 2, 3 }, { -63, -65 }, { 4, 5 }, + { -62, -66 }, { 6, 7 }, { -61, -67 }, { 8, 9 }, + { -68, -60 }, { -59, 10 }, { -69, 11 }, { -58, 12 }, + { -70, 13 }, { -71, 14 }, { -57, 15 }, { 16, 17 }, + { -56, -72 }, { 18, 19 }, { -55, -54 }, { 20, 21 }, + { -73, -53 }, { 22, 24 }, { -74, 23 }, { -75, -78 }, + { 25, 26 }, { -77, -76 }, { -52, 27 }, { -51, -50 } +}; + +const Char aBookPsIccTimeDecode[14][2] = +{ + { -64, 1 }, { -63, 2 }, { -65, 3 }, { -62, 4 }, + { -66, 5 }, { -61, 6 }, { -67, 7 }, { -60, 8 }, + { -68, 9 }, { -59, 10 }, { -69, 11 }, { -58, 12 }, + { -70, 13 }, { -71, -57 } +}; + +const Char aBookPsIccFreqDecode[14][2] = +{ + { -64, 1 }, { -63, 2 }, { -65, 3 }, { -62, 4 }, + { -66, 5 }, { -61, 6 }, { -67, 7 }, { -60, 8 }, + { -59, 9 }, { -68, 10 }, { -58, 11 }, { -69, 12 }, + { -57, 13 }, { -70, -71 } +}; + +const Char aBookPsIidFineTimeDecode[60][2] = +{ + { 1, -64 }, { -63, 2 }, { 3, -65 }, { 4, 59 }, + { 5, 7 }, { 6, -67 }, { -68, -60 }, { -61, 8 }, + { 9, 11 }, { -59, 10 }, { -70, -58 }, { 12, 41 }, + { 13, 20 }, { 14, -71 }, { -55, 15 }, { -53, 16 }, + { 17, -77 }, { 18, 19 }, { -85, -84 }, { -46, -45 }, + { -57, 21 }, { 22, 40 }, { 23, 29 }, { -51, 24 }, + { 25, 26 }, { -83, -82 }, { 27, 28 }, { -90, -38 }, + { -92, -91 }, { 30, 37 }, { 31, 34 }, { 32, 33 }, + { -35, -34 }, { -37, -36 }, { 35, 36 }, { -94, -93 }, + { -89, -39 }, { 38, -79 }, { 39, -81 }, { -88, -40 }, + { -74, -54 }, { 42, -69 }, { 43, 44 }, { -72, -56 }, + { 45, 52 }, { 46, 50 }, { 47, -76 }, { -49, 48 }, + { -47, 49 }, { -87, -41 }, { -52, 51 }, { -78, -50 }, + { 53, -73 }, { 54, -75 }, { 55, 57 }, { 56, -80 }, + { -86, -42 }, { -48, 58 }, { -44, -43 }, { -66, -62 } +}; + +const Char aBookPsIidFineFreqDecode[60][2] = +{ + { 1, -64 }, { 2, 4 }, { 3, -65 }, { -66, -62 }, + { -63, 5 }, { 6, 7 }, { -67, -61 }, { 8, 9 }, + { -68, -60 }, { 10, 11 }, { -69, -59 }, { 12, 13 }, + { -70, -58 }, { 14, 18 }, { -57, 15 }, { 16, -72 }, + { -54, 17 }, { -75, -53 }, { 19, 37 }, { -56, 20 }, + { 21, -73 }, { 22, 29 }, { 23, -76 }, { 24, -78 }, + { 25, 28 }, { 26, 27 }, { -85, -43 }, { -83, -45 }, + { -81, -47 }, { -52, 30 }, { -50, 31 }, { 32, -79 }, + { 33, 34 }, { -82, -46 }, { 35, 36 }, { -90, -89 }, + { -92, -91 }, { 38, -71 }, { -55, 39 }, { 40, -74 }, + { 41, 50 }, { 42, -77 }, { -49, 43 }, { 44, 47 }, + { 45, 46 }, { -86, -42 }, { -88, -87 }, { 48, 49 }, + { -39, -38 }, { -41, -40 }, { -51, 51 }, { 52, 59 }, + { 53, 56 }, { 54, 55 }, { -35, -34 }, { -37, -36 }, + { 57, 58 }, { -94, -93 }, { -84, -44 }, { -80, -48 } +}; + + + + + + +/*---------------------------------------------------------------------------- +; FUNCTION CODE +----------------------------------------------------------------------------*/ + +Int32 ps_read_data(STRUCT_PS_DEC *ps_dec, + BIT_BUFFER * hBitBuf, + Int32 nBitsLeft) + +{ + Int gr; + UInt32 env; + UInt32 dtFlag; + Int32 startbits; + SbrHuffman CurrentTable; + + if (!ps_dec) + { + return 0; + } + + startbits = GetNrBitsAvailable(hBitBuf); + + if (buf_get_1bit(hBitBuf)) /* Enable Header */ + { + ps_dec->bEnableIid = buf_get_1bit(hBitBuf); + + if (ps_dec->bEnableIid) + { + ps_dec->freqResIid = buf_getbits(hBitBuf, 3); + + if (ps_dec->freqResIid > 2) + { + ps_dec->bFineIidQ = 1; + ps_dec->freqResIid -= 3; + } + else + { + ps_dec->bFineIidQ = 0; + } + } + + ps_dec->bEnableIcc = buf_get_1bit(hBitBuf); + if (ps_dec->bEnableIcc) + { + ps_dec->freqResIcc = buf_getbits(hBitBuf, 3); + + if (ps_dec->freqResIcc > 2) + { + ps_dec->freqResIcc -= 3; + } + } + ps_dec->bEnableExt = buf_get_1bit(hBitBuf); + } + + ps_dec->bFrameClass = buf_get_1bit(hBitBuf); + if (ps_dec->bFrameClass == 0) + { + ps_dec->noEnv = aFixNoEnvDecode[ buf_getbits(hBitBuf, 2)]; + } + else + { + ps_dec->noEnv = 1 + buf_getbits(hBitBuf, 2); + for (env = 1; env < ps_dec->noEnv + 1; env++) + { + ps_dec->aEnvStartStop[env] = (buf_getbits(hBitBuf, 5)) + 1; + } + } + + if ((ps_dec->freqResIid > 2) || (ps_dec->freqResIcc > 2)) + { + + ps_dec->bPsDataAvail = 0; + + nBitsLeft -= startbits - GetNrBitsAvailable(hBitBuf); + while (nBitsLeft) + { + int i = nBitsLeft; + if (i > 8) + { + i = 8; + } + buf_getbits(hBitBuf, i); + nBitsLeft -= i; + } + return (startbits - GetNrBitsAvailable(hBitBuf)); + } + + if (ps_dec->bEnableIid) + { + for (env = 0; env < ps_dec->noEnv; env++) + { + dtFlag = buf_get_1bit(hBitBuf); + + if (!dtFlag) + { + if (ps_dec->bFineIidQ) + { + CurrentTable = aBookPsIidFineFreqDecode; + } + else + { + CurrentTable = aBookPsIidFreqDecode; + } + } + else + { + if (ps_dec->bFineIidQ) + { + CurrentTable = aBookPsIidFineTimeDecode; + } + else + { + CurrentTable = aBookPsIidTimeDecode; + } + } + + for (gr = 0; gr < aNoIidBins[ps_dec->freqResIid]; gr++) + { + ps_dec->aaIidIndex[env][gr] = sbr_decode_huff_cw(CurrentTable, hBitBuf); + } + + ps_dec->abIidDtFlag[env] = dtFlag; + } + } + + if (ps_dec->bEnableIcc) + { + for (env = 0; env < ps_dec->noEnv; env++) + { + dtFlag = buf_get_1bit(hBitBuf); + if (!dtFlag) + { + CurrentTable = aBookPsIccFreqDecode; + } + else + { + CurrentTable = aBookPsIccTimeDecode; + } + for (gr = 0; gr < aNoIccBins[ps_dec->freqResIcc]; gr++) + { + ps_dec->aaIccIndex[env][gr] = sbr_decode_huff_cw(CurrentTable, hBitBuf); + } + + ps_dec->abIccDtFlag[env] = dtFlag; + } + } + + if (ps_dec->bEnableExt) + { + + int cnt; + + cnt = (int)buf_getbits(hBitBuf, 4); + + if (cnt == 15) + { + cnt += (int)buf_getbits(hBitBuf, 8); + } + + hBitBuf->nrBitsRead += (cnt << 3); + } + + ps_dec->bPsDataAvail = 1; + + return (startbits - GetNrBitsAvailable(hBitBuf)); +} + +#endif + + +#endif + |