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Diffstat (limited to 'libfaad2/syntax.c')
| -rw-r--r-- | libfaad2/syntax.c | 2516 |
1 files changed, 0 insertions, 2516 deletions
diff --git a/libfaad2/syntax.c b/libfaad2/syntax.c deleted file mode 100644 index eeaa12c8bb..0000000000 --- a/libfaad2/syntax.c +++ /dev/null @@ -1,2516 +0,0 @@ -/* -** FAAD2 - Freeware Advanced Audio (AAC) Decoder including SBR decoding -** Copyright (C) 2003-2004 M. Bakker, Ahead Software AG, http://www.nero.com -** -** This program is free software; you can redistribute it and/or modify -** it under the terms of the GNU General Public License as published by -** the Free Software Foundation; either version 2 of the License, or -** (at your option) any later version. -** -** This program is distributed in the hope that it will be useful, -** but WITHOUT ANY WARRANTY; without even the implied warranty of -** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -** GNU General Public License for more details. -** -** You should have received a copy of the GNU General Public License -** along with this program; if not, write to the Free Software -** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. -** -** Any non-GPL usage of this software or parts of this software is strictly -** forbidden. -** -** Commercial non-GPL licensing of this software is possible. -** For more info contact Ahead Software through Mpeg4AAClicense@nero.com. -** -** $Id: syntax.c,v 1.82 2004/09/04 14:56:29 menno Exp $ -**/ - -/* - Reads the AAC bitstream as defined in 14496-3 (MPEG-4 Audio) -*/ - -#include "common.h" -#include "structs.h" - -#include <stdlib.h> -#include <string.h> - -#include "decoder.h" -#include "syntax.h" -#include "specrec.h" -#include "huffman.h" -#include "bits.h" -#include "pulse.h" -#include "analysis.h" -#include "drc.h" -#ifdef ERROR_RESILIENCE -#include "rvlc.h" -#endif -#ifdef SBR_DEC -#include "sbr_syntax.h" -#endif -#include "mp4.h" - - -/* static function declarations */ -static void decode_sce_lfe(NeAACDecHandle hDecoder, NeAACDecFrameInfo *hInfo, bitfile *ld, - uint8_t id_syn_ele); -static void decode_cpe(NeAACDecHandle hDecoder, NeAACDecFrameInfo *hInfo, bitfile *ld, - uint8_t id_syn_ele); -static uint8_t single_lfe_channel_element(NeAACDecHandle hDecoder, bitfile *ld, - uint8_t channel, uint8_t *tag); -static uint8_t channel_pair_element(NeAACDecHandle hDecoder, bitfile *ld, - uint8_t channel, uint8_t *tag); -#ifdef COUPLING_DEC -static uint8_t coupling_channel_element(NeAACDecHandle hDecoder, bitfile *ld); -#endif -static uint16_t data_stream_element(NeAACDecHandle hDecoder, bitfile *ld); -static uint8_t program_config_element(program_config *pce, bitfile *ld); -static uint8_t fill_element(NeAACDecHandle hDecoder, bitfile *ld, drc_info *drc -#ifdef SBR_DEC - ,uint8_t sbr_ele -#endif - ); -static uint8_t individual_channel_stream(NeAACDecHandle hDecoder, element *ele, - bitfile *ld, ic_stream *ics, uint8_t scal_flag, - int16_t *spec_data); -static uint8_t ics_info(NeAACDecHandle hDecoder, ic_stream *ics, bitfile *ld, - uint8_t common_window); -static uint8_t section_data(NeAACDecHandle hDecoder, ic_stream *ics, bitfile *ld); -static uint8_t scale_factor_data(NeAACDecHandle hDecoder, ic_stream *ics, bitfile *ld); -#ifdef SSR_DEC -static void gain_control_data(bitfile *ld, ic_stream *ics); -#endif -static uint8_t spectral_data(NeAACDecHandle hDecoder, ic_stream *ics, bitfile *ld, - int16_t *spectral_data); -static uint16_t extension_payload(bitfile *ld, drc_info *drc, uint16_t count); -static uint8_t pulse_data(ic_stream *ics, pulse_info *pul, bitfile *ld); -static void tns_data(ic_stream *ics, tns_info *tns, bitfile *ld); -#ifdef LTP_DEC -static uint8_t ltp_data(NeAACDecHandle hDecoder, ic_stream *ics, ltp_info *ltp, bitfile *ld); -#endif -static uint8_t adts_fixed_header(adts_header *adts, bitfile *ld); -static void adts_variable_header(adts_header *adts, bitfile *ld); -static void adts_error_check(adts_header *adts, bitfile *ld); -static uint8_t dynamic_range_info(bitfile *ld, drc_info *drc); -static uint8_t excluded_channels(bitfile *ld, drc_info *drc); -#ifdef SCALABLE_DEC -static int8_t aac_scalable_main_header(NeAACDecHandle hDecoder, ic_stream *ics1, ic_stream *ics2, - bitfile *ld, uint8_t this_layer_stereo); -#endif - - -/* Table 4.4.1 */ -int8_t GASpecificConfig(bitfile *ld, mp4AudioSpecificConfig *mp4ASC, - program_config *pce_out) -{ - program_config pce; - - /* 1024 or 960 */ - mp4ASC->frameLengthFlag = faad_get1bit(ld - DEBUGVAR(1,138,"GASpecificConfig(): FrameLengthFlag")); -#ifndef ALLOW_SMALL_FRAMELENGTH - if (mp4ASC->frameLengthFlag == 1) - return -3; -#endif - - mp4ASC->dependsOnCoreCoder = faad_get1bit(ld - DEBUGVAR(1,139,"GASpecificConfig(): DependsOnCoreCoder")); - if (mp4ASC->dependsOnCoreCoder == 1) - { - mp4ASC->coreCoderDelay = (uint16_t)faad_getbits(ld, 14 - DEBUGVAR(1,140,"GASpecificConfig(): CoreCoderDelay")); - } - - mp4ASC->extensionFlag = faad_get1bit(ld DEBUGVAR(1,141,"GASpecificConfig(): ExtensionFlag")); - if (mp4ASC->channelsConfiguration == 0) - { - if (program_config_element(&pce, ld)) - return -3; - //mp4ASC->channelsConfiguration = pce.channels; - - if (pce_out != NULL) - memcpy(pce_out, &pce, sizeof(program_config)); - - /* - if (pce.num_valid_cc_elements) - return -3; - */ - } - -#ifdef ERROR_RESILIENCE - if (mp4ASC->extensionFlag == 1) - { - /* Error resilience not supported yet */ - if (mp4ASC->objectTypeIndex >= ER_OBJECT_START) - { - mp4ASC->aacSectionDataResilienceFlag = faad_get1bit(ld - DEBUGVAR(1,144,"GASpecificConfig(): aacSectionDataResilienceFlag")); - mp4ASC->aacScalefactorDataResilienceFlag = faad_get1bit(ld - DEBUGVAR(1,145,"GASpecificConfig(): aacScalefactorDataResilienceFlag")); - mp4ASC->aacSpectralDataResilienceFlag = faad_get1bit(ld - DEBUGVAR(1,146,"GASpecificConfig(): aacSpectralDataResilienceFlag")); - } - /* 1 bit: extensionFlag3 */ - faad_getbits(ld, 1); - } -#endif - - return 0; -} - -/* Table 4.4.2 */ -/* An MPEG-4 Audio decoder is only required to follow the Program - Configuration Element in GASpecificConfig(). The decoder shall ignore - any Program Configuration Elements that may occur in raw data blocks. - PCEs transmitted in raw data blocks cannot be used to convey decoder - configuration information. -*/ -static uint8_t program_config_element(program_config *pce, bitfile *ld) -{ - uint8_t i; - - memset(pce, 0, sizeof(program_config)); - - pce->channels = 0; - - pce->element_instance_tag = (uint8_t)faad_getbits(ld, 4 - DEBUGVAR(1,10,"program_config_element(): element_instance_tag")); - - pce->object_type = (uint8_t)faad_getbits(ld, 2 - DEBUGVAR(1,11,"program_config_element(): object_type")); - pce->sf_index = (uint8_t)faad_getbits(ld, 4 - DEBUGVAR(1,12,"program_config_element(): sf_index")); - pce->num_front_channel_elements = (uint8_t)faad_getbits(ld, 4 - DEBUGVAR(1,13,"program_config_element(): num_front_channel_elements")); - pce->num_side_channel_elements = (uint8_t)faad_getbits(ld, 4 - DEBUGVAR(1,14,"program_config_element(): num_side_channel_elements")); - pce->num_back_channel_elements = (uint8_t)faad_getbits(ld, 4 - DEBUGVAR(1,15,"program_config_element(): num_back_channel_elements")); - pce->num_lfe_channel_elements = (uint8_t)faad_getbits(ld, 2 - DEBUGVAR(1,16,"program_config_element(): num_lfe_channel_elements")); - pce->num_assoc_data_elements = (uint8_t)faad_getbits(ld, 3 - DEBUGVAR(1,17,"program_config_element(): num_assoc_data_elements")); - pce->num_valid_cc_elements = (uint8_t)faad_getbits(ld, 4 - DEBUGVAR(1,18,"program_config_element(): num_valid_cc_elements")); - - pce->mono_mixdown_present = faad_get1bit(ld - DEBUGVAR(1,19,"program_config_element(): mono_mixdown_present")); - if (pce->mono_mixdown_present == 1) - { - pce->mono_mixdown_element_number = (uint8_t)faad_getbits(ld, 4 - DEBUGVAR(1,20,"program_config_element(): mono_mixdown_element_number")); - } - - pce->stereo_mixdown_present = faad_get1bit(ld - DEBUGVAR(1,21,"program_config_element(): stereo_mixdown_present")); - if (pce->stereo_mixdown_present == 1) - { - pce->stereo_mixdown_element_number = (uint8_t)faad_getbits(ld, 4 - DEBUGVAR(1,22,"program_config_element(): stereo_mixdown_element_number")); - } - - pce->matrix_mixdown_idx_present = faad_get1bit(ld - DEBUGVAR(1,23,"program_config_element(): matrix_mixdown_idx_present")); - if (pce->matrix_mixdown_idx_present == 1) - { - pce->matrix_mixdown_idx = (uint8_t)faad_getbits(ld, 2 - DEBUGVAR(1,24,"program_config_element(): matrix_mixdown_idx")); - pce->pseudo_surround_enable = faad_get1bit(ld - DEBUGVAR(1,25,"program_config_element(): pseudo_surround_enable")); - } - - for (i = 0; i < pce->num_front_channel_elements; i++) - { - pce->front_element_is_cpe[i] = faad_get1bit(ld - DEBUGVAR(1,26,"program_config_element(): front_element_is_cpe")); - pce->front_element_tag_select[i] = (uint8_t)faad_getbits(ld, 4 - DEBUGVAR(1,27,"program_config_element(): front_element_tag_select")); - - if (pce->front_element_is_cpe[i] & 1) - { - pce->cpe_channel[pce->front_element_tag_select[i]] = pce->channels; - pce->num_front_channels += 2; - pce->channels += 2; - } else { - pce->sce_channel[pce->front_element_tag_select[i]] = pce->channels; - pce->num_front_channels++; - pce->channels++; - } - } - - for (i = 0; i < pce->num_side_channel_elements; i++) - { - pce->side_element_is_cpe[i] = faad_get1bit(ld - DEBUGVAR(1,28,"program_config_element(): side_element_is_cpe")); - pce->side_element_tag_select[i] = (uint8_t)faad_getbits(ld, 4 - DEBUGVAR(1,29,"program_config_element(): side_element_tag_select")); - - if (pce->side_element_is_cpe[i] & 1) - { - pce->cpe_channel[pce->side_element_tag_select[i]] = pce->channels; - pce->num_side_channels += 2; - pce->channels += 2; - } else { - pce->sce_channel[pce->side_element_tag_select[i]] = pce->channels; - pce->num_side_channels++; - pce->channels++; - } - } - - for (i = 0; i < pce->num_back_channel_elements; i++) - { - pce->back_element_is_cpe[i] = faad_get1bit(ld - DEBUGVAR(1,30,"program_config_element(): back_element_is_cpe")); - pce->back_element_tag_select[i] = (uint8_t)faad_getbits(ld, 4 - DEBUGVAR(1,31,"program_config_element(): back_element_tag_select")); - - if (pce->back_element_is_cpe[i] & 1) - { - pce->cpe_channel[pce->back_element_tag_select[i]] = pce->channels; - pce->channels += 2; - pce->num_back_channels += 2; - } else { - pce->sce_channel[pce->back_element_tag_select[i]] = pce->channels; - pce->num_back_channels++; - pce->channels++; - } - } - - for (i = 0; i < pce->num_lfe_channel_elements; i++) - { - pce->lfe_element_tag_select[i] = (uint8_t)faad_getbits(ld, 4 - DEBUGVAR(1,32,"program_config_element(): lfe_element_tag_select")); - - pce->sce_channel[pce->lfe_element_tag_select[i]] = pce->channels; - pce->num_lfe_channels++; - pce->channels++; - } - - for (i = 0; i < pce->num_assoc_data_elements; i++) - pce->assoc_data_element_tag_select[i] = (uint8_t)faad_getbits(ld, 4 - DEBUGVAR(1,33,"program_config_element(): assoc_data_element_tag_select")); - - for (i = 0; i < pce->num_valid_cc_elements; i++) - { - pce->cc_element_is_ind_sw[i] = faad_get1bit(ld - DEBUGVAR(1,34,"program_config_element(): cc_element_is_ind_sw")); - pce->valid_cc_element_tag_select[i] = (uint8_t)faad_getbits(ld, 4 - DEBUGVAR(1,35,"program_config_element(): valid_cc_element_tag_select")); - } - - faad_byte_align(ld); - - pce->comment_field_bytes = (uint8_t)faad_getbits(ld, 8 - DEBUGVAR(1,36,"program_config_element(): comment_field_bytes")); - - for (i = 0; i < pce->comment_field_bytes; i++) - { - pce->comment_field_data[i] = (uint8_t)faad_getbits(ld, 8 - DEBUGVAR(1,37,"program_config_element(): comment_field_data")); - } - pce->comment_field_data[i] = 0; - - if (pce->channels > MAX_CHANNELS) - return 22; - - return 0; -} - -static void decode_sce_lfe(NeAACDecHandle hDecoder, - NeAACDecFrameInfo *hInfo, bitfile *ld, - uint8_t id_syn_ele) -{ - uint8_t channels = hDecoder->fr_channels; - uint8_t tag = 0; - - if (channels+1 > MAX_CHANNELS) - { - hInfo->error = 12; - return; - } - if (hDecoder->fr_ch_ele+1 > MAX_SYNTAX_ELEMENTS) - { - hInfo->error = 13; - return; - } - - /* for SCE hDecoder->element_output_channels[] is not set here because this - can become 2 when some form of Parametric Stereo coding is used - */ - - /* save the syntax element id */ - hDecoder->element_id[hDecoder->fr_ch_ele] = id_syn_ele; - - /* decode the element */ - hInfo->error = single_lfe_channel_element(hDecoder, ld, channels, &tag); - - /* map output channels position to internal data channels */ - if (hDecoder->element_output_channels[hDecoder->fr_ch_ele] == 2) - { - /* this might be faulty when pce_set is true */ - hDecoder->internal_channel[channels] = channels; - hDecoder->internal_channel[channels+1] = channels+1; - } else { - if (hDecoder->pce_set) - hDecoder->internal_channel[hDecoder->pce.sce_channel[tag]] = channels; - else - hDecoder->internal_channel[channels] = channels; - } - - hDecoder->fr_channels += hDecoder->element_output_channels[hDecoder->fr_ch_ele]; - hDecoder->fr_ch_ele++; -} - -static void decode_cpe(NeAACDecHandle hDecoder, NeAACDecFrameInfo *hInfo, bitfile *ld, - uint8_t id_syn_ele) -{ - uint8_t channels = hDecoder->fr_channels; - uint8_t tag = 0; - - if (channels+2 > MAX_CHANNELS) - { - hInfo->error = 12; - return; - } - if (hDecoder->fr_ch_ele+1 > MAX_SYNTAX_ELEMENTS) - { - hInfo->error = 13; - return; - } - - /* for CPE the number of output channels is always 2 */ - if (hDecoder->element_output_channels[hDecoder->fr_ch_ele] == 0) - { - /* element_output_channels not set yet */ - hDecoder->element_output_channels[hDecoder->fr_ch_ele] = 2; - } else if (hDecoder->element_output_channels[hDecoder->fr_ch_ele] != 2) { - /* element inconsistency */ - hInfo->error = 21; - return; - } - - /* save the syntax element id */ - hDecoder->element_id[hDecoder->fr_ch_ele] = id_syn_ele; - - /* decode the element */ - hInfo->error = channel_pair_element(hDecoder, ld, channels, &tag); - - /* map output channel position to internal data channels */ - if (hDecoder->pce_set) - { - hDecoder->internal_channel[hDecoder->pce.cpe_channel[tag]] = channels; - hDecoder->internal_channel[hDecoder->pce.cpe_channel[tag]+1] = channels+1; - } else { - hDecoder->internal_channel[channels] = channels; - hDecoder->internal_channel[channels+1] = channels+1; - } - - hDecoder->fr_channels += 2; - hDecoder->fr_ch_ele++; -} - -void raw_data_block(NeAACDecHandle hDecoder, NeAACDecFrameInfo *hInfo, - bitfile *ld, program_config *pce, drc_info *drc) -{ - uint8_t id_syn_ele; - - hDecoder->fr_channels = 0; - hDecoder->fr_ch_ele = 0; - hDecoder->first_syn_ele = 25; - hDecoder->has_lfe = 0; - -#ifdef ERROR_RESILIENCE - if (hDecoder->object_type < ER_OBJECT_START) - { -#endif - /* Table 4.4.3: raw_data_block() */ - while ((id_syn_ele = (uint8_t)faad_getbits(ld, LEN_SE_ID - DEBUGVAR(1,4,"NeAACDecDecode(): id_syn_ele"))) != ID_END) - { - switch (id_syn_ele) { - case ID_SCE: - if (hDecoder->first_syn_ele == 25) hDecoder->first_syn_ele = id_syn_ele; - decode_sce_lfe(hDecoder, hInfo, ld, id_syn_ele); - if (hInfo->error > 0) - return; - break; - case ID_CPE: - if (hDecoder->first_syn_ele == 25) hDecoder->first_syn_ele = id_syn_ele; - decode_cpe(hDecoder, hInfo, ld, id_syn_ele); - if (hInfo->error > 0) - return; - break; - case ID_LFE: - hDecoder->has_lfe++; - decode_sce_lfe(hDecoder, hInfo, ld, id_syn_ele); - if (hInfo->error > 0) - return; - break; - case ID_CCE: /* not implemented yet, but skip the bits */ -#ifdef COUPLING_DEC - hInfo->error = coupling_channel_element(hDecoder, ld); -#else - hInfo->error = 6; -#endif - if (hInfo->error > 0) - return; - break; - case ID_DSE: - data_stream_element(hDecoder, ld); - break; - case ID_PCE: - /* 14496-4: 5.6.4.1.2.1.3: */ - /* program_configuration_element()'s in access units shall be ignored */ - program_config_element(pce, ld); - //if ((hInfo->error = program_config_element(pce, ld)) > 0) - // return; - //hDecoder->pce_set = 1; - break; - case ID_FIL: - /* one sbr_info describes a channel_element not a channel! */ - /* if we encounter SBR data here: error */ - /* SBR data will be read directly in the SCE/LFE/CPE element */ - if ((hInfo->error = fill_element(hDecoder, ld, drc -#ifdef SBR_DEC - , INVALID_SBR_ELEMENT -#endif - )) > 0) - return; - break; - } - } -#ifdef ERROR_RESILIENCE - } else { - /* Table 262: er_raw_data_block() */ - switch (hDecoder->channelConfiguration) - { - case 1: - decode_sce_lfe(hDecoder, hInfo, ld, ID_SCE); - if (hInfo->error > 0) - return; - break; - case 2: - decode_cpe(hDecoder, hInfo, ld, ID_CPE); - if (hInfo->error > 0) - return; - break; - case 3: - decode_sce_lfe(hDecoder, hInfo, ld, ID_SCE); - decode_cpe(hDecoder, hInfo, ld, ID_CPE); - if (hInfo->error > 0) - return; - break; - case 4: - decode_sce_lfe(hDecoder, hInfo, ld, ID_SCE); - decode_cpe(hDecoder, hInfo, ld, ID_CPE); - decode_sce_lfe(hDecoder, hInfo, ld, ID_SCE); - if (hInfo->error > 0) - return; - break; - case 5: - decode_sce_lfe(hDecoder, hInfo, ld, ID_SCE); - decode_cpe(hDecoder, hInfo, ld, ID_CPE); - decode_cpe(hDecoder, hInfo, ld, ID_CPE); - if (hInfo->error > 0) - return; - break; - case 6: - decode_sce_lfe(hDecoder, hInfo, ld, ID_SCE); - decode_cpe(hDecoder, hInfo, ld, ID_CPE); - decode_cpe(hDecoder, hInfo, ld, ID_CPE); - decode_sce_lfe(hDecoder, hInfo, ld, ID_LFE); - if (hInfo->error > 0) - return; - break; - case 7: /* 8 channels */ - decode_sce_lfe(hDecoder, hInfo, ld, ID_SCE); - decode_cpe(hDecoder, hInfo, ld, ID_CPE); - decode_cpe(hDecoder, hInfo, ld, ID_CPE); - decode_cpe(hDecoder, hInfo, ld, ID_CPE); - decode_sce_lfe(hDecoder, hInfo, ld, ID_LFE); - if (hInfo->error > 0) - return; - break; - default: - hInfo->error = 7; - return; - } -#if 0 - cnt = bits_to_decode() / 8; - while (cnt >= 1) - { - cnt -= extension_payload(cnt); - } -#endif - } -#endif - - /* new in corrigendum 14496-3:2002 */ -#ifdef DRM - if (hDecoder->object_type != DRM_ER_LC && !hDecoder->latm_header_present) -#endif - { - faad_byte_align(ld); - } - - return; -} - -/* Table 4.4.4 and */ -/* Table 4.4.9 */ -static uint8_t single_lfe_channel_element(NeAACDecHandle hDecoder, bitfile *ld, - uint8_t channel, uint8_t *tag) -{ - uint8_t retval = 0; - element sce = {0}; - ic_stream *ics = &(sce.ics1); - ALIGN int16_t spec_data[1024] = {0}; - - sce.element_instance_tag = (uint8_t)faad_getbits(ld, LEN_TAG - DEBUGVAR(1,38,"single_lfe_channel_element(): element_instance_tag")); - - *tag = sce.element_instance_tag; - sce.channel = channel; - sce.paired_channel = -1; - - retval = individual_channel_stream(hDecoder, &sce, ld, ics, 0, spec_data); - if (retval > 0) - return retval; - -#ifdef SBR_DEC - /* check if next bitstream element is a fill element */ - /* if so, read it now so SBR decoding can be done in case of a file with SBR */ - if (faad_showbits(ld, LEN_SE_ID) == ID_FIL) - { - faad_flushbits(ld, LEN_SE_ID); - - /* one sbr_info describes a channel_element not a channel! */ - if ((retval = fill_element(hDecoder, ld, hDecoder->drc, hDecoder->fr_ch_ele)) > 0) - { - return retval; - } - } -#endif - - /* noiseless coding is done, spectral reconstruction is done now */ - retval = reconstruct_single_channel(hDecoder, ics, &sce, spec_data); - if (retval > 0) - return retval; - - return 0; -} - -/* Table 4.4.5 */ -static uint8_t channel_pair_element(NeAACDecHandle hDecoder, bitfile *ld, - uint8_t channels, uint8_t *tag) -{ - ALIGN int16_t spec_data1[1024] = {0}; - ALIGN int16_t spec_data2[1024] = {0}; - element cpe = {0}; - ic_stream *ics1 = &(cpe.ics1); - ic_stream *ics2 = &(cpe.ics2); - uint8_t result; - - cpe.channel = channels; - cpe.paired_channel = channels+1; - - cpe.element_instance_tag = (uint8_t)faad_getbits(ld, LEN_TAG - DEBUGVAR(1,39,"channel_pair_element(): element_instance_tag")); - *tag = cpe.element_instance_tag; - - if ((cpe.common_window = faad_get1bit(ld - DEBUGVAR(1,40,"channel_pair_element(): common_window"))) & 1) - { - /* both channels have common ics information */ - if ((result = ics_info(hDecoder, ics1, ld, cpe.common_window)) > 0) - return result; - - ics1->ms_mask_present = (uint8_t)faad_getbits(ld, 2 - DEBUGVAR(1,41,"channel_pair_element(): ms_mask_present")); - if (ics1->ms_mask_present == 1) - { - uint8_t g, sfb; - for (g = 0; g < ics1->num_window_groups; g++) - { - for (sfb = 0; sfb < ics1->max_sfb; sfb++) - { - ics1->ms_used[g][sfb] = faad_get1bit(ld - DEBUGVAR(1,42,"channel_pair_element(): faad_get1bit")); - } - } - } - -#ifdef ERROR_RESILIENCE - if ((hDecoder->object_type >= ER_OBJECT_START) && (ics1->predictor_data_present)) - { - if (( -#ifdef LTP_DEC - ics1->ltp.data_present = -#endif - faad_get1bit(ld DEBUGVAR(1,50,"channel_pair_element(): ltp.data_present"))) & 1) - { -#ifdef LTP_DEC - if ((result = ltp_data(hDecoder, ics1, &(ics1->ltp), ld)) > 0) - { - return result; - } -#else - return 26; -#endif - } - } -#endif - - memcpy(ics2, ics1, sizeof(ic_stream)); - } else { - ics1->ms_mask_present = 0; - } - - if ((result = individual_channel_stream(hDecoder, &cpe, ld, ics1, - 0, spec_data1)) > 0) - { - return result; - } - -#ifdef ERROR_RESILIENCE - if (cpe.common_window && (hDecoder->object_type >= ER_OBJECT_START) && - (ics1->predictor_data_present)) - { - if (( -#ifdef LTP_DEC - ics1->ltp2.data_present = -#endif - faad_get1bit(ld DEBUGVAR(1,50,"channel_pair_element(): ltp.data_present"))) & 1) - { -#ifdef LTP_DEC - if ((result = ltp_data(hDecoder, ics1, &(ics1->ltp2), ld)) > 0) - { - return result; - } -#else - return 26; -#endif - } - } -#endif - - if ((result = individual_channel_stream(hDecoder, &cpe, ld, ics2, - 0, spec_data2)) > 0) - { - return result; - } - -#ifdef SBR_DEC - /* check if next bitstream element is a fill element */ - /* if so, read it now so SBR decoding can be done in case of a file with SBR */ - if (faad_showbits(ld, LEN_SE_ID) == ID_FIL) - { - faad_flushbits(ld, LEN_SE_ID); - - /* one sbr_info describes a channel_element not a channel! */ - if ((result = fill_element(hDecoder, ld, hDecoder->drc, hDecoder->fr_ch_ele)) > 0) - { - return result; - } - } -#endif - - /* noiseless coding is done, spectral reconstruction is done now */ - if ((result = reconstruct_channel_pair(hDecoder, ics1, ics2, &cpe, - spec_data1, spec_data2)) > 0) - { - return result; - } - - return 0; -} - -/* Table 4.4.6 */ -static uint8_t ics_info(NeAACDecHandle hDecoder, ic_stream *ics, bitfile *ld, - uint8_t common_window) -{ - uint8_t retval = 0; - - /* ics->ics_reserved_bit = */ faad_get1bit(ld - DEBUGVAR(1,43,"ics_info(): ics_reserved_bit")); - ics->window_sequence = (uint8_t)faad_getbits(ld, 2 - DEBUGVAR(1,44,"ics_info(): window_sequence")); - ics->window_shape = faad_get1bit(ld - DEBUGVAR(1,45,"ics_info(): window_shape")); - - if (ics->window_sequence == EIGHT_SHORT_SEQUENCE) - { - ics->max_sfb = (uint8_t)faad_getbits(ld, 4 - DEBUGVAR(1,46,"ics_info(): max_sfb (short)")); - ics->scale_factor_grouping = (uint8_t)faad_getbits(ld, 7 - DEBUGVAR(1,47,"ics_info(): scale_factor_grouping")); - } else { - ics->max_sfb = (uint8_t)faad_getbits(ld, 6 - DEBUGVAR(1,48,"ics_info(): max_sfb (long)")); - } - - /* get the grouping information */ - if ((retval = window_grouping_info(hDecoder, ics)) > 0) - return retval; - - /* should be an error */ - /* check the range of max_sfb */ - if (ics->max_sfb > ics->num_swb) - return 16; - - if (ics->window_sequence != EIGHT_SHORT_SEQUENCE) - { - if ((ics->predictor_data_present = faad_get1bit(ld - DEBUGVAR(1,49,"ics_info(): predictor_data_present"))) & 1) - { - if (hDecoder->object_type == MAIN) /* MPEG2 style AAC predictor */ - { - uint8_t sfb; - - uint8_t limit = min(ics->max_sfb, max_pred_sfb(hDecoder->sf_index)); -#ifdef MAIN_DEC - ics->pred.limit = limit; -#endif - - if (( -#ifdef MAIN_DEC - ics->pred.predictor_reset = -#endif - faad_get1bit(ld DEBUGVAR(1,53,"ics_info(): pred.predictor_reset"))) & 1) - { -#ifdef MAIN_DEC - ics->pred.predictor_reset_group_number = -#endif - (uint8_t)faad_getbits(ld, 5 DEBUGVAR(1,54,"ics_info(): pred.predictor_reset_group_number")); - } - - for (sfb = 0; sfb < limit; sfb++) - { -#ifdef MAIN_DEC - ics->pred.prediction_used[sfb] = -#endif - faad_get1bit(ld DEBUGVAR(1,55,"ics_info(): pred.prediction_used")); - } - } -#ifdef LTP_DEC - else { /* Long Term Prediction */ - if (hDecoder->object_type < ER_OBJECT_START) - { - if ((ics->ltp.data_present = faad_get1bit(ld - DEBUGVAR(1,50,"ics_info(): ltp.data_present"))) & 1) - { - if ((retval = ltp_data(hDecoder, ics, &(ics->ltp), ld)) > 0) - { - return retval; - } - } - if (common_window) - { - if ((ics->ltp2.data_present = faad_get1bit(ld - DEBUGVAR(1,51,"ics_info(): ltp2.data_present"))) & 1) - { - if ((retval = ltp_data(hDecoder, ics, &(ics->ltp2), ld)) > 0) - { - return retval; - } - } - } - } -#ifdef ERROR_RESILIENCE - if (!common_window && (hDecoder->object_type >= ER_OBJECT_START)) - { - if ((ics->ltp.data_present = faad_get1bit(ld - DEBUGVAR(1,50,"ics_info(): ltp.data_present"))) & 1) - { - ltp_data(hDecoder, ics, &(ics->ltp), ld); - } - } -#endif - } -#endif - } - } - - return retval; -} - -/* Table 4.4.7 */ -static uint8_t pulse_data(ic_stream *ics, pulse_info *pul, bitfile *ld) -{ - uint8_t i; - - pul->number_pulse = (uint8_t)faad_getbits(ld, 2 - DEBUGVAR(1,56,"pulse_data(): number_pulse")); - pul->pulse_start_sfb = (uint8_t)faad_getbits(ld, 6 - DEBUGVAR(1,57,"pulse_data(): pulse_start_sfb")); - - /* check the range of pulse_start_sfb */ - if (pul->pulse_start_sfb > ics->num_swb) - return 16; - - for (i = 0; i < pul->number_pulse+1; i++) - { - pul->pulse_offset[i] = (uint8_t)faad_getbits(ld, 5 - DEBUGVAR(1,58,"pulse_data(): pulse_offset")); -#if 0 - printf("%d\n", pul->pulse_offset[i]); -#endif - pul->pulse_amp[i] = (uint8_t)faad_getbits(ld, 4 - DEBUGVAR(1,59,"pulse_data(): pulse_amp")); -#if 0 - printf("%d\n", pul->pulse_amp[i]); -#endif - } - - return 0; -} - -#ifdef COUPLING_DEC -/* Table 4.4.8: Currently just for skipping the bits... */ -static uint8_t coupling_channel_element(NeAACDecHandle hDecoder, bitfile *ld) -{ - uint8_t c, result = 0; - uint8_t ind_sw_cce_flag = 0; - uint8_t num_gain_element_lists = 0; - uint8_t num_coupled_elements = 0; - - element el_empty = {0}; - ic_stream ics_empty = {0}; - int16_t sh_data[1024]; - - c = faad_getbits(ld, LEN_TAG - DEBUGVAR(1,900,"coupling_channel_element(): element_instance_tag")); - - ind_sw_cce_flag = faad_get1bit(ld - DEBUGVAR(1,901,"coupling_channel_element(): ind_sw_cce_flag")); - num_coupled_elements = faad_getbits(ld, 3 - DEBUGVAR(1,902,"coupling_channel_element(): num_coupled_elements")); - - for (c = 0; c < num_coupled_elements + 1; c++) - { - uint8_t cc_target_is_cpe, cc_target_tag_select; - - num_gain_element_lists++; - - cc_target_is_cpe = faad_get1bit(ld - DEBUGVAR(1,903,"coupling_channel_element(): cc_target_is_cpe")); - cc_target_tag_select = faad_getbits(ld, 4 - DEBUGVAR(1,904,"coupling_channel_element(): cc_target_tag_select")); - - if (cc_target_is_cpe) - { - uint8_t cc_l = faad_get1bit(ld - DEBUGVAR(1,905,"coupling_channel_element(): cc_l")); - uint8_t cc_r = faad_get1bit(ld - DEBUGVAR(1,906,"coupling_channel_element(): cc_r")); - - if (cc_l && cc_r) - num_gain_element_lists++; - } - } - - faad_get1bit(ld - DEBUGVAR(1,907,"coupling_channel_element(): cc_domain")); - faad_get1bit(ld - DEBUGVAR(1,908,"coupling_channel_element(): gain_element_sign")); - faad_getbits(ld, 2 - DEBUGVAR(1,909,"coupling_channel_element(): gain_element_scale")); - - if ((result = individual_channel_stream(hDecoder, &el_empty, ld, &ics_empty, - 0, sh_data)) > 0) - { - return result; - } - - for (c = 1; c < num_gain_element_lists; c++) - { - uint8_t cge; - - if (ind_sw_cce_flag) - { - cge = 1; - } else { - cge = faad_get1bit(ld - DEBUGVAR(1,910,"coupling_channel_element(): common_gain_element_present")); - } - - if (cge) - { - huffman_scale_factor(ld); - } else { - uint8_t g, sfb; - - for (g = 0; g < ics_empty.num_window_groups; g++) - { - for (sfb = 0; sfb < ics_empty.max_sfb; sfb++) - { - if (ics_empty.sfb_cb[g][sfb] != ZERO_HCB) - huffman_scale_factor(ld); - } - } - } - } - - return 0; -} -#endif - -/* Table 4.4.10 */ -static uint16_t data_stream_element(NeAACDecHandle hDecoder, bitfile *ld) -{ - uint8_t byte_aligned; - uint16_t i, count; - - /* element_instance_tag = */ faad_getbits(ld, LEN_TAG - DEBUGVAR(1,60,"data_stream_element(): element_instance_tag")); - byte_aligned = faad_get1bit(ld - DEBUGVAR(1,61,"data_stream_element(): byte_aligned")); - count = (uint16_t)faad_getbits(ld, 8 - DEBUGVAR(1,62,"data_stream_element(): count")); - if (count == 255) - { - count += (uint16_t)faad_getbits(ld, 8 - DEBUGVAR(1,63,"data_stream_element(): extra count")); - } - if (byte_aligned) - faad_byte_align(ld); - - for (i = 0; i < count; i++) - { - faad_getbits(ld, LEN_BYTE - DEBUGVAR(1,64,"data_stream_element(): data_stream_byte")); - } - - return count; -} - -/* Table 4.4.11 */ -static uint8_t fill_element(NeAACDecHandle hDecoder, bitfile *ld, drc_info *drc -#ifdef SBR_DEC - ,uint8_t sbr_ele -#endif - ) -{ - uint16_t count; -#ifdef SBR_DEC - uint8_t bs_extension_type; -#endif - - count = (uint16_t)faad_getbits(ld, 4 - DEBUGVAR(1,65,"fill_element(): count")); - if (count == 15) - { - count += (uint16_t)faad_getbits(ld, 8 - DEBUGVAR(1,66,"fill_element(): extra count")) - 1; - } - - if (count > 0) - { -#ifdef SBR_DEC - bs_extension_type = (uint8_t)faad_showbits(ld, 4); - - if ((bs_extension_type == EXT_SBR_DATA) || - |