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Diffstat (limited to 'media/libstagefright/codecs/aacdec/huffdecode.cpp')
| -rw-r--r-- | media/libstagefright/codecs/aacdec/huffdecode.cpp | 528 |
1 files changed, 0 insertions, 528 deletions
diff --git a/media/libstagefright/codecs/aacdec/huffdecode.cpp b/media/libstagefright/codecs/aacdec/huffdecode.cpp deleted file mode 100644 index 890a6fb..0000000 --- a/media/libstagefright/codecs/aacdec/huffdecode.cpp +++ /dev/null @@ -1,528 +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: huffdecode.c - ------------------------------------------------------------------------------- - REVISION HISTORY - - Description: Modified from original shareware code - - Description: Modified to pass variables by reference to eliminate use - of global variables. - - Description: Change variable types. - - Description: (1) Modified to bring in-line with PV standards. - (2) Eliminated global_gain on stack, - getics() has to define this parameter on its stack. - (3) Eliminated multiple returns - (4) Altered return logic of getics() - (5) Convert Real coef -> Int32 coef - (6) Move BITS *pInputStream to 2nd parameter of huffdecode.c - and getics.c - (7) Pass pFrameInfo per channel, because two channels can have - different windows - - Description: (1) Eliminated function call to chn_config - (2) Eliminate widx calculation - (3) copy channel info from left to right when common_window - is enabled - (4) add error checking of getmask return value - - Description: Change default_position to current_program - - Description: Remove prstflag - - Description: Modify call to get_ics_info - - Description: Modified so getmask is NOT called if the status returned - from get_ics_info indicates an error. - - Description: - (1) Added include of "e_ElementId.h" - Previously, this function was relying on another include file - to include e_ElementId.h - - (2) Updated the copyright header. - - Description: Modified to include usage of the new "shared memory" structures - defined in s_tDec_Int_File.h and s_tDec_Int_Chan.h - - Description: - (1) Updated to reflect the fact that the temporary FrameInfo used by getics.c - was moved into the region of memory shared with fxpCoef. - - Description: - (1) Removed first parameter to getics. The temporary FrameInfo was - unnecessary. - - Description: Replace some instances of getbits to get9_n_lessbits - when the number of bits read is 9 or less and get1bits - when only 1 bit is read. - - Description: Relaxed tag verification. Some encoder do not match the tag - to the channel ID (as the standard request to differentiate - different channel), in our wireless work, with only mono - or stereo channel, this become restrictive to some encoders - - - Description: - ------------------------------------------------------------------------------- - INPUT AND OUTPUT DEFINITIONS - - Inputs: - - id_syn_ele = identification flag for channel syntactic element, Int - - pInputStream= pointer to input bitstream, BITS. - - pVars = pointer to structure that holds information for decoding, - tDec_Int_File - - pChVars[] = pointer to structure that holds channel information, - tDec_Int_Chan - - - Local Stores/Buffers/Pointers Needed: - None - - Global Stores/Buffers/Pointers Needed: - None - - Outputs: - status = 0 if success - non-zero otherwise - - Pointers and Buffers Modified: - pChVars->sect contents updated by newly decoded section information - of current frame - - pChVars->factors contents updated by newly decoded scalefactors - - pChVars->ch_coef contents updated by newly decoded spectral coefficients - - PChVars->tns contents updated by newly decoded TNS information - - pVars->hasmask contents updated by newly decoded Mid/Side mask - information - - pVars->pulseInfo contents updated by newly decoded pulse data information - - Local Stores Modified: - None - - Global Stores Modified: - None - ------------------------------------------------------------------------------- - FUNCTION DESCRIPTION - - This function offers a framework for decoding the data of the next 1024 - samples. It maps the channel configuration according to the id_syn_ele flag, - configures the channel information, and calls getics to do huffman decoding - The function returns 1 if there was an error - ------------------------------------------------------------------------------- - REQUIREMENTS - - This function should set up the channel configuration for huffman decoding - ------------------------------------------------------------------------------- - REFERENCES - - (1) 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. - - (2) ISO/IEC 14496-3: 1999(E) - Subpart 4 p15 (single_channel_element, channel_pair_element) - p15 (Table 4.4.5 getmask) - p16 (Table 4.4.6 get_ics_info) - p24 (Table 4.4.24 getics) - ------------------------------------------------------------------------------- - PSEUDO-CODE - - tag = CALL getbits(LEN_TAG,pInputStream) - MODIFYING(pInputStream) - RETURNING(tag) - - common_window = 0; - - IF (id_syn_ele == ID_CPE) - THEN - common_window = CALL getbits(LEN_COM_WIN,pInputStream); - MODIFYING(pInputStream) - RETURNING(common_window) - ENDIF - - pMcInfo = &pVars->mc_info; - - IF ( (pMcInfo->ch_info[0].cpe != id_syn_ele) OR - (pMcInfo->ch_info[0].tag != tag) ) - THEN - status = 1; - ENDIF - - - IF (status == SUCCESS) - THEN - IF (id_syn_ele == ID_SCE) - THEN - - leftCh = 0; - RIGHT = 0; - pChVars[leftCh]->hasmask = 0; - ELSEIF (id_syn_ele == ID_CPE) - - leftCh = 0; - rightCh = 1; - - IF (common_window != FALSE) - THEN - - CALL get_ics_info( - audioObjectType = pVars->mc_info.audioObjectType, - pInputStream = pInputStream, - common_window = common_window, - pWindowSequence = &pChVars[leftCh]->wnd, - &pChVars[leftCh]->wnd_shape_this_bk, - pChVars[leftCh]->group, - &pChVars[leftCh]->max_sfb, - pVars->winmap, - &pChVars[leftCh]->lt_status, - &pChVars[rightCh]->lt_status); - MODIFYING(pInputStream, wnd, wnd_shape_this_bk,group, - max_sfb, lt_status) - RETURNING(status) - - IF (status == SUCCESS) - THEN - - pChVars[rightCh]->wnd = pChVars[leftCh]->wnd; - pChVars[rightCh]->wnd_shape_this_bk = - pChVars[leftCh]->wnd_shape_this_bk; - pChVars[rightCh]->max_sfb = pChVars[leftCh]->max_sfb; - pv_memcpy( - pChVars[rightCh]->group, - pChVars[leftCh]->group, - NSHORT*sizeof(pChVars[leftCh]->group[0])); - - hasmask = CALL getmask( - pVars->winmap[pChVars[leftCh]->wnd], - pInputStream, - pChVars[leftCh]->group, - pChVars[leftCh]->max_sfb, - pChVars[leftCh]->mask); - MODIFYING(pInputStream, mask) - RETURNING(hasmask) - - IF (hasmask == MASK_ERROR) - THEN - status = 1; - ENDIF - pChVars[leftCh]->hasmask = hasmask; - pChVars[rightCh]->hasmask = hasmask; - - ENDIF - - ELSE - - pChVars[leftCh]->hasmask = 0; - pChVars[rightCh]->hasmask = 0; - ENDIF(common_window) - - ENDIF(id_syn_ele) - - ENDIF (status) - - ch = leftCh; - - WHILE((ch <= rightCh) AND (status == SUCCESS)) - - status = CALL getics( - pInputStream, - common_window, - pVars, - pChVars[ch], - pChVars[ch]->group, - &pChVars[ch]->max_sfb, - pChVars[ch]->cb_map, - &pChVars[ch]->tns, - pVars->winmap, - &pVars->pulseInfo, - pChVars[ch]->sect); - MODIFYING(pInputStream,pVarsp,ChVars[ch],group, - max_sfb,tns,pulseInfo,sect) - RETURNING(status) - - ch++; - - ENDWHILE - - 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 "aac_mem_funcs.h" -#include "huffman.h" -#include "e_maskstatus.h" -#include "e_elementid.h" -#include "get_ics_info.h" - -/*---------------------------------------------------------------------------- -; MACROS -; Define module specific macros here -----------------------------------------------------------------------------*/ - -/*---------------------------------------------------------------------------- -; DEFINES -; Include all pre-processor statements here. Include conditional -; compile variables also. -----------------------------------------------------------------------------*/ -#define LEFT (0) -#define RIGHT (1) -/*---------------------------------------------------------------------------- -; 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 huffdecode( - Int id_syn_ele, - BITS *pInputStream, - tDec_Int_File *pVars, - tDec_Int_Chan *pChVars[]) - -{ - /*---------------------------------------------------------------------------- - ; Define all local variables - ----------------------------------------------------------------------------*/ - Int ch; - Int common_window; - Int hasmask; - Int status = SUCCESS; - Int num_channels = 0; - MC_Info *pMcInfo; - - per_chan_share_w_fxpCoef *pChLeftShare; /* Helper pointer */ - per_chan_share_w_fxpCoef *pChRightShare; /* Helper pointer */ - /*---------------------------------------------------------------------------- - ; Function body here - ----------------------------------------------------------------------------*/ - - get9_n_lessbits( - LEN_TAG, - pInputStream); - - /* suppose an un-supported id_syn_ele will never be passed */ - - common_window = 0; - - if (id_syn_ele == ID_CPE) - { - common_window = - get1bits(pInputStream); - } - - pMcInfo = &pVars->mc_info; - - /* - * check if provided info (num of channels) on audio config, - * matches read bitstream data, if not, allow update only once. - * In almost all cases it should match. - */ - if ((pMcInfo->ch_info[0].cpe != id_syn_ele)) - { - if (pVars->mc_info.implicit_channeling) /* check done only once */ - { - pMcInfo->ch_info[0].cpe = id_syn_ele & 1; /* collect info from bitstream - * implicit_channeling flag is locked - * after 1st frame, to avoid toggling - * parameter in the middle of the clip - */ - pMcInfo->nch = (id_syn_ele & 1) + 1; /* update number of channels */ - } - else - { - status = 1; /* ERROR break if syntax error persist */ - } - } - - if (status == SUCCESS) - { - if (id_syn_ele == ID_SCE) - { - - num_channels = 1; - pVars->hasmask = 0; - } - else if (id_syn_ele == ID_CPE) - { - pChLeftShare = pChVars[LEFT]->pShareWfxpCoef; - pChRightShare = pChVars[RIGHT]->pShareWfxpCoef; - num_channels = 2; - - if (common_window != FALSE) - { - - status = get_ics_info( - (tMP4AudioObjectType) pVars->mc_info.audioObjectType, - pInputStream, - (Bool)common_window, - (WINDOW_SEQUENCE *) & pChVars[LEFT]->wnd, - (WINDOW_SHAPE *) & pChVars[LEFT]->wnd_shape_this_bk, - pChLeftShare->group, - (Int *) & pChLeftShare->max_sfb, - pVars->winmap, - (LT_PRED_STATUS *) & pChLeftShare->lt_status, - (LT_PRED_STATUS *) & pChRightShare->lt_status); - - if (status == SUCCESS) - { - /* copy left channel info to right channel */ - pChVars[RIGHT]->wnd = pChVars[LEFT]->wnd; - pChVars[RIGHT]->wnd_shape_this_bk = - pChVars[LEFT]->wnd_shape_this_bk; - pChRightShare->max_sfb = pChLeftShare->max_sfb; - pv_memcpy( - pChRightShare->group, - pChLeftShare->group, - NSHORT*sizeof(pChLeftShare->group[0])); - - hasmask = getmask( - pVars->winmap[pChVars[LEFT]->wnd], - pInputStream, - pChLeftShare->group, - pChLeftShare->max_sfb, - pVars->mask); - - if (hasmask == MASK_ERROR) - { - status = 1; /* ERROR code */ - } - pVars->hasmask = hasmask; - - } /* if (status == 0) */ - } - else - { - pVars->hasmask = 0; - } /* if (common_window) */ - - } /* if (id_syn_ele) */ - - } /* if (status) */ - - ch = 0; - while ((ch < num_channels) && (status == SUCCESS)) - { - pChLeftShare = pChVars[ch]->pShareWfxpCoef; - - status = getics( - pInputStream, - common_window, - pVars, - pChVars[ch], - pChLeftShare->group, - &pChLeftShare->max_sfb, - pChLeftShare->cb_map, - &pChLeftShare->tns, - pVars->winmap, - &pVars->share.a.pulseInfo, - pVars->share.a.sect); - - ch++; - - } /* while (ch) */ - - /*---------------------------------------------------------------------------- - ; Return status - ----------------------------------------------------------------------------*/ - - return status; - -} /* huffdecode */ - |