diff options
Diffstat (limited to 'media/libstagefright/codecs/aacdec/get_audio_specific_config.cpp')
| -rw-r--r-- | media/libstagefright/codecs/aacdec/get_audio_specific_config.cpp | 691 |
1 files changed, 0 insertions, 691 deletions
diff --git a/media/libstagefright/codecs/aacdec/get_audio_specific_config.cpp b/media/libstagefright/codecs/aacdec/get_audio_specific_config.cpp deleted file mode 100644 index 092f397..0000000 --- a/media/libstagefright/codecs/aacdec/get_audio_specific_config.cpp +++ /dev/null @@ -1,691 +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: ./src/get_audio_specific_config.c - ------------------------------------------------------------------------------- - REVISION HISTORY - - Description: Modified per review comments - - Description: Modified per second review comments - (1) change audioObjectType to Int - (2) do not set pVars->prog_config.profile - (3) clean up status flag, default to SUCCESS - (4) fix multiple lines comments - - Description: Change getbits.h to ibstream.h - - Description: Modified per review comments - (1) updated revision history - (2) declare audioObjectType as enum type - - Description: Replace some instances of getbits to get9_n_lessbits - when the number of bits read is 9 or less. - - Description: Added support for backward and non-backward (explicit) - mode for Parametric Stereo (PS) used in enhanced AAC+ - - Who: Date: - Description: - ------------------------------------------------------------------------------- - INPUT AND OUTPUT DEFINITIONS - - Inputs: - pVars = pointer to the structure that holds all information for - this instance of the library. pVars->prog_config is directly - used, and pVars->mc_info, pVars->prog_config, - pVars->pWinSeqInfo, pVars->SFBWidth128 are needed indirectly - for calling set_mc_info. Data type pointer to tDec_Int_File - - Local Stores/Buffers/Pointers Needed: - None - - Global Stores/Buffers/Pointers Needed: - None - - Outputs: - status = 0 if successfully decoded AudioSpecificConfig - 1 if un-supported config is used for this release - - Pointers and Buffers Modified: - pVars->prog_config contents are updated with the information read in. - pVars->mc_info contents are updated with channel information. - pVars->pWinSeqInfo contents are updated with window information. - pVars->SFBWidth128 contents are updated with scale factor band width data. - - Local Stores Modified: - None - - Global Stores Modified: - None - ------------------------------------------------------------------------------- - FUNCTION DESCRIPTION - - This function reads the bitstream for the structure "AudioSpecificConfig", - and sets the decoder configuration that is needed by the decoder to be able - to decode the media properly. - ------------------------------------------------------------------------------- - REQUIREMENTS - - This function shall not use global variables - ------------------------------------------------------------------------------- - REFERENCES - - (1) ISO/IEC 14496-3: 1999(E) - Part 3 - Subpart 1 p18 1.6 Interface to MPEG-4 Systems - Subpart 4 p13 4.4.1 GA Specific Configuration - Amendment p10 6.2.1 AudioSpecificInfo - Amendment p78 8.2 Decoder configuration (GASpecificConfig) - - (2) AAC DecoderSpecificInfo Information - PacketVideo descriptions - San Diego - ------------------------------------------------------------------------------- - PSEUDO-CODE - - status = SUCCESS; - - pInputStream = &(pVars->inputStream); - - temp = CALL getbits( - neededBits = LEN_OBJ_TYPE + LEN_SAMP_RATE_IDX, - pInputStream = pInputStream) - MODIFYING (pInputStream) - RETURNING (temp) - - audioObjectType = (temp & 0x1f0) >> 4; - - pVars->prog_config.profile = audioObjectType; - - pVars->prog_config.sampling_rate_idx = temp & 0xf; - - IF (pVars->prog_config.sampling_rate_idx == 0xf) - THEN - sampling_rate = CALL getbits( - neededBits = LEN_SAMP_RATE, - pInputStream = pInputStream); - MODIFYING (pInputStream) - RETURNING (sampling_rate) - ENDIF - - channel_config = CALL getbits( - neededBits = LEN_CHAN_CONFIG, - pInputStream = pInputStream); - MODIFYING (pInputStream) - RETURNING (channel_config) - - IF (channel_config > 2) - THEN - status = 1; - ENDIF - - IF (((audioObjectType == MP4AUDIO_AAC_MAIN) OR - (audioObjectType == MP4AUDIO_AAC_LC) OR - (audioObjectType == MP4AUDIO_AAC_SSR) OR - (audioObjectType == MP4AUDIO_LTP) OR - (audioObjectType == MP4AUDIO_AAC_SCALABLE) OR - (audioObjectType == MP4AUDIO_TWINVQ)) AND (status == -1)) - THEN - status = CALL get_GA_specific_config( - pVars = pVars, - channel_config = channel_config, - audioObjectType = audioObjectType, - pInputStream = pInputStream); - MODIFYING (pVars->mc_info,channel_config,pInputStream) - RETURNING (status) - - ENDIF - - IF (audioObjectType == MP4AUDIO_CELP) - THEN - status = 1; - ENDIF - - IF (audioObjectType == MP4AUDIO_HVXC) - THEN - status = 1; - ENDIF - - IF (audioObjectType == MP4AUDIO_TTSI) - THEN - status = 1; - ENDIF - - IF ((audioObjectType == 13) OR (audioObjectType == 14) OR - (audioObjectType == 15) OR (audioObjectType == 16)) - THEN - status = 1; - ENDIF - - IF (((audioObjectType == MP4AUDIO_ER_AAC_LC) OR - (audioObjectType == MP4AUDIO_ER_AAC_LTP) OR - (audioObjectType == MP4AUDIO_ER_AAC_SCALABLE) OR - (audioObjectType == MP4AUDIO_ER_TWINVQ) OR - (audioObjectType == MP4AUDIO_ER_BSAC) OR - (audioObjectType == MP4AUDIO_ER_AAC_LD)) AND (status == -1)) - THEN - status = 1; - ENDIF - - IF (audioObjectType == MP4AUDIO_ER_CELP) - THEN - status = 1; - ENDIF - - IF (audioObjectType == MP4AUDIO_ER_HVXC) - THEN - status = 1; - ENDIF - - IF ((audioObjectType == MP4AUDIO_ER_HILN) OR - (audioObjectType == MP4AUDIO_PARAMETRIC)) - THEN - status = 1; - ENDIF - - IF ((audioObjectType == MP4AUDIO_ER_AAC_LC) OR - (audioObjectType == MP4AUDIO_ER_AAC_LTP) OR - (audioObjectType == MP4AUDIO_ER_AAC_SCALABLE) OR - (audioObjectType == MP4AUDIO_ER_TWINVQ) OR - (audioObjectType == MP4AUDIO_ER_BSAC) OR - (audioObjectType == MP4AUDIO_ER_AAC_LD) OR - (audioObjectType == MP4AUDIO_ER_CELP) OR - (audioObjectType == MP4AUDIO_ER_HVXC) OR - (audioObjectType == MP4AUDIO_ER_HILN) OR - (audioObjectType == MP4AUDIO_PARAMETRIC)) - THEN - epConfig = CALL getbits( - neededBits = LEN_EP_CONFIG, - pInputStream = pInputStream); - MODIFYING (pInputStream) - RETURNING (epConfig) - - IF (epConfig == 2) - THEN - status = 1; - ENDIF - - ENDIF - - 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_mp4ff_const.h" -#include "e_tmp4audioobjecttype.h" -#include "get_audio_specific_config.h" -#include "get_ga_specific_config.h" -#include "ibstream.h" -#include "sfb.h" /* Where samp_rate_info[] is declared */ - -/*---------------------------------------------------------------------------- -; 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 -----------------------------------------------------------------------------*/ - -/*---------------------------------------------------------------------------- -; FUNCTION CODE -----------------------------------------------------------------------------*/ -Int get_audio_specific_config(tDec_Int_File * const pVars) -{ - - UInt temp; - tMP4AudioObjectType audioObjectType; - //UInt32 sampling_rate; - UInt channel_config; - UInt syncExtensionType; - UInt extensionAudioObjectType = 0; - UInt extensionSamplingFrequencyIndex = 0; - BITS *pInputStream; - Int status; - - status = SUCCESS; - - pInputStream = &(pVars->inputStream); - - pVars->mc_info.upsamplingFactor = 1; /* default to regular AAC */ - - temp = get9_n_lessbits(LEN_OBJ_TYPE + LEN_SAMP_RATE_IDX, - pInputStream); - - /* - * The following code can directly set the values of elements in - * MC_Info, rather than first setting the values in pVars->prog_config - * and then copy these values to MC_Info by calling set_mc_info. - * In order to keep consistent with get_prog_config (ADIF) and - * get_adts_header (ADTS), the code here is still copying - * the info, and set the pVars->current_program = 0 - */ - - /* AudioObjectType */ - audioObjectType = (tMP4AudioObjectType)((temp & 0x1f0) >> 4); - - pVars->mc_info.ExtendedAudioObjectType = audioObjectType; /* default */ - /* saving an audioObjectType into a profile field */ - /* pVars->prog_config.profile = audioObjectType; */ - - /* sampling rate index */ - pVars->prog_config.sampling_rate_idx = temp & 0xf; - - if (pVars->prog_config.sampling_rate_idx > 0xb) - { - /* - * Only support 12 sampling frequencies from array samp_rate_info ( see sfb.cpp) - * 7350 Hz (index 0xc) is not supported, the other indexes are reserved or escape - */ - if (pVars->prog_config.sampling_rate_idx == 0xf) /* escape sequence */ - { - /* - * sampling rate not listed in Table 1.6.2, - * this release does not support this - */ - /*sampling_rate = getbits( LEN_SAMP_RATE, - pInputStream);*/ - getbits(LEN_SAMP_RATE, pInputStream); /* future use */ - } - - status = 1; - } - - channel_config = get9_n_lessbits(LEN_CHAN_CONFIG, - pInputStream); - - if ((channel_config > 2) && (!pVars->aacConfigUtilityEnabled)) - { - /* - * AAC lib does not support more than two channels - * signal error when in decoder mode - * do not test when in utility mode - */ - status = 1; - - } - - if (audioObjectType == MP4AUDIO_SBR || audioObjectType == MP4AUDIO_PS) - { - /* to disable explicit backward compatiblity check */ - pVars->mc_info.ExtendedAudioObjectType = MP4AUDIO_SBR; - pVars->mc_info.sbrPresentFlag = 1; - - if (audioObjectType == MP4AUDIO_PS) - { - pVars->mc_info.psPresentFlag = 1; - pVars->mc_info.ExtendedAudioObjectType = MP4AUDIO_PS; - } - - extensionSamplingFrequencyIndex = /* extensionSamplingFrequencyIndex */ - get9_n_lessbits(LEN_SAMP_RATE_IDX, - pInputStream); - if (extensionSamplingFrequencyIndex == 0x0f) - { - /* - * sampling rate not listed in Table 1.6.2, - * this release does not support this - */ - /*sampling_rate = getbits( LEN_SAMP_RATE, - pInputStream);*/ - getbits(LEN_SAMP_RATE, pInputStream); - } - - audioObjectType = (tMP4AudioObjectType) get9_n_lessbits(LEN_OBJ_TYPE , - pInputStream); - } - - - if ((/*(audioObjectType == MP4AUDIO_AAC_MAIN) ||*/ - (audioObjectType == MP4AUDIO_AAC_LC) || - /*(audioObjectType == MP4AUDIO_AAC_SSR) ||*/ - (audioObjectType == MP4AUDIO_LTP) /*||*/ - /*(audioObjectType == MP4AUDIO_AAC_SCALABLE) ||*/ - /*(audioObjectType == MP4AUDIO_TWINVQ)*/) && (status == SUCCESS)) - { - status = get_GA_specific_config(pVars, - pInputStream, - channel_config, - audioObjectType); - - /* - * verify that Program config returned a supported audio object type - */ - - if ((pVars->mc_info.audioObjectType != MP4AUDIO_AAC_LC) && - (pVars->mc_info.audioObjectType != MP4AUDIO_LTP)) - { - return 1; /* status != SUCCESS invalid aot */ - } - } - else - { - return 1; /* status != SUCCESS invalid aot or invalid parameter */ - } - - /* - * SBR tool explicit signaling ( backward compatible ) - */ - if (extensionAudioObjectType != MP4AUDIO_SBR) - { - syncExtensionType = (UInt)get17_n_lessbits(LEN_SYNC_EXTENSION_TYPE, - pInputStream); - - if (syncExtensionType == 0x2b7) - { - extensionAudioObjectType = get9_n_lessbits( /* extensionAudioObjectType */ - LEN_OBJ_TYPE, - pInputStream); - - if (extensionAudioObjectType == MP4AUDIO_SBR) - { - pVars->mc_info.sbrPresentFlag = get1bits(pInputStream); /* sbrPresentFlag */ - if (pVars->mc_info.sbrPresentFlag == 1) - { - extensionSamplingFrequencyIndex = - get9_n_lessbits( /* extensionSamplingFrequencyIndex */ - LEN_SAMP_RATE_IDX, - pInputStream); - if (pVars->aacPlusEnabled == true) - { -#ifdef AAC_PLUS - pVars->mc_info.upsamplingFactor = (samp_rate_info[extensionSamplingFrequencyIndex].samp_rate >> 1) == - samp_rate_info[pVars->prog_config.sampling_rate_idx].samp_rate ? 2 : 1; - - if ((Int)extensionSamplingFrequencyIndex == pVars->prog_config.sampling_rate_idx) - { - /* - * Disable SBR decoding for any sbr-downsampled file whose SF is >= 24 KHz - */ - if (pVars->prog_config.sampling_rate_idx < 6) - { - pVars->aacPlusEnabled = false; - } - - pVars->mc_info.bDownSampledSbr = true; - } - pVars->prog_config.sampling_rate_idx = extensionSamplingFrequencyIndex; - -#endif - } - - if (extensionSamplingFrequencyIndex == 0x0f) - { - /* - * sampling rate not listed in Table 1.6.2, - * this release does not support this - */ - /*sampling_rate = getbits( LEN_SAMP_RATE, - pInputStream);*/ - getbits(LEN_SAMP_RATE, pInputStream); - } - /* syncExtensionType */ - syncExtensionType = (UInt)get17_n_lessbits(LEN_SYNC_EXTENSION_TYPE, - pInputStream); - if (syncExtensionType == 0x548) - { - pVars->mc_info.psPresentFlag = get1bits(pInputStream); /* psPresentFlag */ - if (pVars->mc_info.psPresentFlag) - { - extensionAudioObjectType = MP4AUDIO_PS; - } - } - else - { - /* - * Rewind bitstream pointer so that the syncExtensionType reading has no - * effect when decoding raw bitstream - */ - pVars->inputStream.usedBits -= LEN_SYNC_EXTENSION_TYPE; - } - - pVars->mc_info.ExtendedAudioObjectType = (eMP4AudioObjectType)extensionAudioObjectType; - } - } - } - else if (!status) - { - /* - * Rewind bitstream pointer so that the syncExtensionType reading has no - * effect when decoding raw bitstream - */ - pVars->inputStream.usedBits -= LEN_SYNC_EXTENSION_TYPE; - -#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) && - 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 = SBR_NOT_INITIALIZED; - pVars->sbrDecoderData.SbrChannel[1].syncState = SBR_NOT_INITIALIZED; - - } -#endif - - } - } - else /* MP4AUDIO_SBR was detected */ - { - /* - * Set the real output frequency use by the SBR tool, define tentative upsample ratio - */ - if (pVars->aacPlusEnabled == true) - { -#ifdef AAC_PLUS - pVars->mc_info.upsamplingFactor = (samp_rate_info[extensionSamplingFrequencyIndex].samp_rate >> 1) == - samp_rate_info[pVars->prog_config.sampling_rate_idx].samp_rate ? 2 : 1; - - if ((Int)extensionSamplingFrequencyIndex == pVars->prog_config.sampling_rate_idx) - { - /* - * Disable SBR decoding for any sbr-downsampled file whose SF is >= 24 KHz - */ - if (pVars->prog_config.sampling_rate_idx < 6) - { - pVars->aacPlusEnabled = false; - } - pVars->mc_info.bDownSampledSbr = true; - } - pVars->prog_config.sampling_rate_idx = extensionSamplingFrequencyIndex; - - - -#endif - - - - - } - - } /* if ( extensionAudioObjectType != MP4AUDIO_SBR ) */ - - /* - * The following object types are not supported in this release, - * however, keep these interfaces for future implementation - */ - - /* - *if (audioObjectType == MP4AUDIO_CELP) - *{ - * status = 1; - *} - */ - - /* - *if (audioObjectType == MP4AUDIO_HVXC) - *{ - * status = 1; - *} - */ - - /* - *if (audioObjectType == MP4AUDIO_TTSI) - *{ - * status = 1; - *} - */ - - /* - *if ((audioObjectType == 13) || (audioObjectType == 14) || - * (audioObjectType == 15) || (audioObjectType == 16)) - *{ - * status = 1; - *} - */ - - /* The following objects are Amendment 1 objects */ - /* - *if (((audioObjectType == MP4AUDIO_ER_AAC_LC) || - * (audioObjectType == MP4AUDIO_ER_AAC_LTP) || - * (audioObjectType == MP4AUDIO_ER_AAC_SCALABLE) || - * (audioObjectType == MP4AUDIO_ER_TWINVQ) || - * (audioObjectType == MP4AUDIO_ER_BSAC) || - * (audioObjectType == MP4AUDIO_ER_AAC_LD)) && (status == -1)) - *{ - */ - /* - * should call get_GA_specific_config - * for this release, do not support Error Resilience - * temporary solution is set status flag and exit decoding - */ - /* status = 1; - *} - */ - - /* - *if (audioObjectType == MP4AUDIO_ER_CELP) - * { - * status = 1; - *} - */ - - /* - *if (audioObjectType == MP4AUDIO_ER_HVXC) - *{ - * status = 1; - *} - */ - - /* - *if ((audioObjectType == MP4AUDIO_ER_HILN) || - * (audioObjectType == MP4AUDIO_PARAMETRIC)) - *{ - * status = 1; - *} - */ - - /* - *if ((audioObjectType == MP4AUDIO_ER_AAC_LC) || - * (audioObjectType == MP4AUDIO_ER_AAC_LTP) || - * (audioObjectType == MP4AUDIO_ER_AAC_SCALABLE) || - * (audioObjectType == MP4AUDIO_ER_TWINVQ) || - * (audioObjectType == MP4AUDIO_ER_BSAC) || - * (audioObjectType == MP4AUDIO_ER_AAC_LD) || - * (audioObjectType == MP4AUDIO_ER_CELP) || - * (audioObjectType == MP4AUDIO_ER_HVXC) || - * (audioObjectType == MP4AUDIO_ER_HILN) || - * (audioObjectType == MP4AUDIO_PARAMETRIC)) - *{ - */ - /* error protection config */ - /* - * epConfig = - * getbits( - * LEN_EP_CONFIG, - * pInputStream); - * - * if (epConfig == 2) - * { - */ - /* should call ErrorProtectionSpecificConfig() */ - /* - * status = 1; - * } - * - *} - */ - - return status; - -} |