diff options
Diffstat (limited to 'media/libstagefright/codecs/aacdec/get_adif_header.cpp')
| -rw-r--r-- | media/libstagefright/codecs/aacdec/get_adif_header.cpp | 443 |
1 files changed, 0 insertions, 443 deletions
diff --git a/media/libstagefright/codecs/aacdec/get_adif_header.cpp b/media/libstagefright/codecs/aacdec/get_adif_header.cpp deleted file mode 100644 index 8a1e74b..0000000 --- a/media/libstagefright/codecs/aacdec/get_adif_header.cpp +++ /dev/null @@ -1,443 +0,0 @@ -/* ------------------------------------------------------------------ - * 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. - * ------------------------------------------------------------------- - */ -/* - - Pathname: get_adif_header.c - ------------------------------------------------------------------------------- - REVISION HISTORY - - Description: Modified from original shareware code - - Description: Modified to pass variables by reference to eliminate use - of global variables. - - Description: Change to PV template, remove default config parameter, - move some functionality into get_prog_config(). - - Description: Update per code review - 1) Add parameter pScratchPCE - 2) Change way ADIF_ID is read in. - 3) Fix comments - 4) ADD a test for status != SUCCESS in loop. - - Description: The ADIF_Header has now been delegated to the "scratch memory" - union. This change inside s_tDec_Int_File.h had to be reflected here also. - - Description: Updated the SW template to include the full pathname to the - source file and a slightly modified copyright header. - - Who: Date: - Description: - ------------------------------------------------------------------------------- - INPUT AND OUTPUT DEFINITIONS - - Inputs: - pVars = pointer to the structure that contains the current state - of this instance of the library, of data type pointer to - tDec_Int_File - - pScratchPCE = pointer to a ProgConfig structure used as scratch in the - the function get_prog_config. of data type pointer to - ProgConfig - - Local Stores/Buffers/Pointers Needed: None - - Global Stores/Buffers/Pointers Needed: None - - Outputs: - The function returns 0 if no error occurred, non-zero otherwise. - - Pointers and Buffers Modified: - pVars->adif_header contents are updated with the some of the ADIF header - contents - pVars->tempProgConfig contents are overwritten with last PCE found, - which is most likely the first one found. - pVars->prog_config contents are updated with the first PCE found. - pVars->inputStream contents are modify in such a way that the - stream is moved further along in the buffer. - pVars->SFBWidth128 contents may be updated. - pVars->winSeqInfo contents may be updated. - pScratchPCE contents may be updated. - - Local Stores Modified: None - - Global Stores Modified: None - ------------------------------------------------------------------------------- - FUNCTION DESCRIPTION - - This function reads in the ADIF Header found at the front of ADIF streams. - If the header is not found an error is returned. An ADIF header can contain - from zero to sixteen program configuration elements (PCE). This function, and - the rest of the library, saves and uses the first PCE found. ------------------------------------------------------------------------------- - REQUIREMENTS - - Function shall not use static or global variables. - ------------------------------------------------------------------------------- - REFERENCES - - (1) ISO/IEC 13818-7:1997 Titled "Information technology - Generic coding - of moving pictures and associated audio information - Part 7: Advanced - Audio Coding (AAC)", Table 6.21 - Syntax of program_config_element(), - page 16, and section 8.5 "Program Config Element (PCE)", page 30. - - (2) MPEG-2 NBC Audio Decoder - "This software module was originally developed by AT&T, Dolby - Laboratories, Fraunhofer Gesellschaft IIS in the course of development - of the MPEG-2 NBC/MPEG-4 Audio standard ISO/IEC 13818-7, 14496-1,2 and - 3. This software module is an implementation of a part of one or more - MPEG-2 NBC/MPEG-4 Audio tools as specified by the MPEG-2 NBC/MPEG-4 - Audio standard. ISO/IEC gives users of the MPEG-2 NBC/MPEG-4 Audio - standards free license to this software module or modifications thereof - for use in hardware or software products claiming conformance to the - MPEG-2 NBC/MPEG-4 Audio standards. Those intending to use this software - module in hardware or software products are advised that this use may - infringe existing patents. The original developer of this software - module and his/her company, the subsequent editors and their companies, - and ISO/IEC have no liability for use of this software module or - modifications thereof in an implementation. Copyright is not released - for non MPEG-2 NBC/MPEG-4 Audio conforming products.The original - developer retains full right to use the code for his/her own purpose, - assign or donate the code to a third party and to inhibit third party - from using the code for non MPEG-2 NBC/MPEG-4 Audio conforming products. - This copyright notice must be included in all copies or derivative - works." - Copyright(c)1996. - ------------------------------------------------------------------------------- - PSEUDO-CODE - - CALL getbits( - neededBits = 2 * LEN_BYTE, - pInputStream = pInputStream) - MODIFYING( pInputStream ) - RETURNING( theIDFromFile ) - - CALL getbits( - neededBits = 2 * LEN_BYTE, - pInputStream = pInputStream) - MODIFYING( pInputStream ) - RETURNING( temp ) - - theIDFromFile = (theIDFromFile << (2*LEN_BYTE)) | temp; - - IF (theIDFromFile != ADIF_ID) - THEN - - pInputStream->usedBits -= (4 * LEN_BYTE); - - status = -1; - ELSE - CALL getbits( - neededBits = LEN_COPYRT_PRES, - pInputStream = pInputStream) - MODIFYING( pInputStream ) - RETURNING( temp ) - - IF (temp != FALSE) THEN - FOR (i = LEN_COPYRT_ID; i > 0; i--) - CALL getbits( - neededBits = LEN_BYTE, - pInputStream = pInputStream) - MODIFYING( pInputStream ) - - END FOR - END IF - - CALL getbits( - neededBits = LEN_ORIG + LEN_HOME, - pInputStream = pInputStream) - MODIFYING( pInputStream ) - - CALL getbits( - neededBits = LEN_BS_TYPE, - pInputStream = pInputStream) - MODIFYING( pInputStream ) - RETURNING( bitStreamType ) - - CALL getbits( - neededBits = LEN_BIT_RATE, - pInputStream = pInputStream) - MODIFYING( pInputStream ) - RETURNING( pHeader->bitrate ) - - CALL getbits( - neededBits = LEN_NUM_PCE, - pInputStream = pInputStream) - MODIFYING( pInputStream ) - RETURNING( numConfigElementsMinus1 ) - - FOR ( i = numConfigElementsMinus1; - (i >= 0) && (status == SUCCESS); - i--) - - IF (bitStreamType == CONSTANT_RATE_BITSTREAM) THEN - CALL getbits( - neededBits = LEN_ADIF_BF, - pInputStream = pInputStream) - MODIFYING( pInputStream ) - END IF - - CALL get_prog_config( - pVars = pVars) - MODIFYING( pVars->prog_config ) - RETURNING( status ) - - END FOR - END IF - - RETURN (status) - ------------------------------------------------------------------------------- - RESOURCES USED - When the code is written for a specific target processor the - the resources used should be documented below. - - STACK USAGE: [stack count for this module] + [variable to represent - stack usage for each subroutine called] - - where: [stack usage variable] = stack usage for [subroutine - name] (see [filename].ext) - - DATA MEMORY USED: x words - - PROGRAM MEMORY USED: x words - - CLOCK CYCLES: [cycle count equation for this module] + [variable - used to represent cycle count for each subroutine - called] - - where: [cycle count variable] = cycle count for [subroutine - name] (see [filename].ext) - ------------------------------------------------------------------------------- -*/ - -/*---------------------------------------------------------------------------- -; INCLUDES -----------------------------------------------------------------------------*/ -#include "pv_audio_type_defs.h" -#include "e_adif_const.h" - -#include "s_progconfig.h" -#include "s_adif_header.h" -#include "s_bits.h" -#include "s_mc_info.h" -#include "s_frameinfo.h" -#include "s_tdec_int_file.h" - -#include "get_prog_config.h" -#include "ibstream.h" - -#include "get_adif_header.h" - -/*---------------------------------------------------------------------------- -; MACROS -; Define module specific macros here -----------------------------------------------------------------------------*/ - -/*---------------------------------------------------------------------------- -; DEFINES -; Include all pre-processor statements here. Include conditional -; compile variables also. -----------------------------------------------------------------------------*/ - -/* - * This constant is simply the characters 'A' 'D' 'I' 'F' compressed into - * a UInt32. Any possible endian problems that exist must be solved by - * the function that fills the buffer and getbits(), or this constant and - * the rest of the bit stream will not work. - */ -#define ADIF_ID (0x41444946) - -/*---------------------------------------------------------------------------- -; LOCAL FUNCTION DEFINITIONS -; Function Prototype declaration -----------------------------------------------------------------------------*/ - -/*---------------------------------------------------------------------------- -; LOCAL VARIABLE DEFINITIONS -; Variable declaration - defined here and used outside this module -----------------------------------------------------------------------------*/ - -/*---------------------------------------------------------------------------- -; EXTERNAL FUNCTION REFERENCES -; Declare functions defined elsewhere and referenced in this module -----------------------------------------------------------------------------*/ - -/*---------------------------------------------------------------------------- -; EXTERNAL VARIABLES REFERENCES -; Declare variables used in this module but defined elsewhere -----------------------------------------------------------------------------*/ - -Int get_adif_header( - tDec_Int_File *pVars, - ProgConfig *pScratchPCE) -{ - Int i; - UInt32 temp; - Int numConfigElementsMinus1; - Int bitStreamType; - UInt32 theIDFromFile; - - BITS *pInputStream = &pVars->inputStream; - ADIF_Header *pHeader = &pVars->scratch.adif_header; - Int status = SUCCESS; - - /* - * The ADIF_ID field is 32 bits long, one more than what getbits() can - * do, so read the field in two parts. There is no point in saving the - * string - it either matches or it does not. If it matches, it must - * have been 'ADIF' - */ - - theIDFromFile = get17_n_lessbits((2 * LEN_BYTE), pInputStream); - - temp = get17_n_lessbits((2 * LEN_BYTE), pInputStream); - - theIDFromFile = (theIDFromFile << (2 * LEN_BYTE)) | temp; - - - if (theIDFromFile != ADIF_ID) - { - /* - * Rewind the bit stream pointer so a search for ADTS header - * can start at the beginning. - */ - - pInputStream->usedBits -= (4 * LEN_BYTE); - - /* - * The constant in the next line needs to be updated when - * error handling method is determined. - */ - status = -1; - } - else - { - /* - * To save space, the unused fields are read in, but not saved. - */ - - /* copyright string */ - temp = - get1bits(/* LEN_COPYRT_PRES,*/ - pInputStream); - - if (temp != FALSE) - { - /* - * Read in and ignore the copyright string. If restoring - * watch out for count down loop. - */ - - for (i = LEN_COPYRT_ID; i > 0; i--) - { - get9_n_lessbits(LEN_BYTE, - pInputStream); - } /* end for */ - - /* - * Make sure to terminate the string with '\0' if restoring - * the the copyright string. - */ - - } /* end if */ - - /* Combine the original/copy and fields into one call */ - get9_n_lessbits( - LEN_ORIG + LEN_HOME, - pInputStream); - - bitStreamType = - get1bits(/* LEN_BS_TYPE,*/ - pInputStream); - - pHeader->bitrate = - getbits( - LEN_BIT_RATE, - pInputStream); - - /* - * Read in all the Program Configuration Elements. - * For this library, only one of the up to 16 possible PCE's will be - * saved. Since each PCE must be read, a temporary PCE structure is - * used, and if that PCE is the one to use, it is copied into the - * single PCE. This is done inside of get_prog_config() - */ - - numConfigElementsMinus1 = get9_n_lessbits(LEN_NUM_PCE, - pInputStream); - - for (i = numConfigElementsMinus1; - (i >= 0) && (status == SUCCESS); - i--) - { - /* - * For ADIF contant bit rate streams, the _encoder_ buffer - * fullness is transmitted. This version of an AAC decoder has - * no use for this variable; yet it must be read in to move - * the bitstream pointers. - */ - - if (bitStreamType == CONSTANT_RATE_BITSTREAM) - { - getbits( - LEN_ADIF_BF, - pInputStream); - } /* end if */ - - pVars->adif_test = 1; - /* Get one program configuration element */ - status = - get_prog_config( - pVars, - pScratchPCE); - -#ifdef AAC_PLUS - - /* - * For implicit signalling, no hint that sbr or ps is used, so we need to - * check the sampling frequency of the aac content, if lesser or equal to - * 24 KHz, by defualt upsample, otherwise, do nothing - */ - if ((pVars->prog_config.sampling_rate_idx >= 6) && (pVars->aacPlusEnabled == true) && - pVars->mc_info.audioObjectType == MP4AUDIO_AAC_LC) - { - pVars->mc_info.upsamplingFactor = 2; - pVars->prog_config.sampling_rate_idx -= 3; - pVars->mc_info.sbrPresentFlag = 1; - pVars->sbrDecoderData.SbrChannel[0].syncState = UPSAMPLING; - pVars->sbrDecoderData.SbrChannel[1].syncState = UPSAMPLING; - } -#endif - - - - } /* end for */ - - - } /* end 'else' of --> if (theIDFromFile != ADIF_ID) */ - - return status; - -} /* end get_adif_header */ |