/****************************************************************************** * * * Copyright (C) 2018 The Android Open Source Project * * 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. * ***************************************************************************** * Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore */ #include #include "ixheaacd_type_def.h" #include "ixheaacd_error_standards.h" #include "ixheaacd_constants.h" #include "ixheaacd_basic_ops32.h" #include "ixheaacd_basic_ops16.h" #include "ixheaacd_basic_ops40.h" #include "ixheaacd_sbr_common.h" #include "ixheaacd_bitbuffer.h" #include "ixheaacd_defines.h" #include "ixheaacd_aac_rom.h" #include "ixheaacd_sbrdecsettings.h" #include "ixheaacd_sbr_scale.h" #include "ixheaacd_env_extr_part.h" #include "ixheaacd_sbr_rom.h" #include "ixheaacd_lpp_tran.h" #include "ixheaacd_hybrid.h" #include "ixheaacd_ps_dec.h" #include "ixheaacd_env_extr.h" #include "ixheaacd_common_rom.h" #include "ixheaacd_pulsedata.h" #include "ixheaacd_pns.h" #include "ixheaacd_drc_data_struct.h" #include "ixheaacd_lt_predict.h" #include "ixheaacd_channelinfo.h" #include "ixheaacd_drc_dec.h" #include "ixheaacd_sbrdecoder.h" #include "ixheaacd_block.h" #include "ixheaacd_channel.h" #include "ixheaacd_adts.h" #include "ixheaacd_audioobjtypes.h" #include "ixheaacd_sbrdecoder.h" #include "ixheaacd_memory_standards.h" #include "ixheaacd_latmdemux.h" #include "ixheaacd_aacdec.h" #include "ixheaacd_mps_polyphase.h" #include "ixheaacd_config.h" #include "ixheaacd_mps_dec.h" #include "ixheaacd_struct_def.h" #include "ixheaacd_error_codes.h" #include "ixheaacd_definitions.h" #include "ixheaacd_adts_crc_check.h" #include "ixheaacd_headerdecode.h" #include "ixheaacd_interface.h" #include "ixheaacd_info.h" #include "ixheaacd_config.h" #include "ixheaacd_struct.h" #include "ixheaacd_function_selector.h" #include "ixheaacd_error_standards.h" #undef ALLOW_SMALL_FRAMELENGTH #define ALLOW_SMALL_FRAMELENGTH #ifdef ALLOW_SMALL_FRAMELENGTH #undef FRAME_SIZE_SMALL #define FRAME_SIZE_SMALL 960 #endif extern const WORD32 ixheaacd_sampl_freq_idx_table[17]; #define AAC_LC_PROFILE (2) #define ADTS_HEADER_LENGTH 7 #undef ALLOW_SMALL_FRAMELENGTH #define ALLOW_SMALL_FRAMELENGTH static PLATFORM_INLINE VOID ixheaacd_aac_bytealign(struct ia_bit_buf_struct *it_bit_buff) { WORD16 num_bit; num_bit = (it_bit_buff->bit_pos + 1); if (num_bit != 8) { it_bit_buff->bit_pos = 7; it_bit_buff->cnt_bits -= num_bit; it_bit_buff->ptr_read_next += 1; } } WORD32 ixheaacd_read_pce_channel_info(WORD32 ch, WORD8 *ptr_is_cpe, WORD8 *ptr_tag_select, struct ia_bit_buf_struct *it_bit_buff) { WORD32 num_ch = 0, i, tmp; for (i = 0; i < ch; i++) { tmp = ixheaacd_read_bits_buf(it_bit_buff, 5); ptr_is_cpe[i] = (tmp & 0x10) >> 4; if (ptr_is_cpe[i]) { num_ch += 2; } else { num_ch++; } ptr_tag_select[i] = (tmp & 0xF); } return num_ch; } VOID ixheaacd_read_pce_mixdown_data(struct ia_bit_buf_struct *it_bit_buff, WORD32 mix_down_present, WORD32 mix_down_element_no) { WORD32 mix_down_flag = ixheaacd_read_bits_buf(it_bit_buff, mix_down_present); if (mix_down_flag == 1) { ixheaacd_read_bits_buf(it_bit_buff, mix_down_element_no); } } VOID ixheaacd_skip_bits(struct ia_bit_buf_struct *it_bit_buff, WORD32 bits, WORD32 num_element) { WORD32 i; for (i = 0; i < num_element; i++) { ixheaacd_read_bits_buf(it_bit_buff, bits); } } WORD32 ixheaacd_read_prog_config_element( ia_program_config_struct *ptr_config_element, struct ia_bit_buf_struct *it_bit_buff) { WORD32 i, tmp; WORD count = 0, num_ch = 0; tmp = ixheaacd_read_bits_buf(it_bit_buff, 6); ptr_config_element->element_instance_tag = (tmp >> 2); ptr_config_element->object_type = tmp & 0x3; if ((ptr_config_element->object_type + 1) != 2 && (ptr_config_element->object_type + 1) != 4 ) { return IA_ENHAACPLUS_DEC_INIT_FATAL_DEC_INIT_FAIL; } ptr_config_element->samp_freq_index = ixheaacd_read_bits_buf(it_bit_buff, 4); if (ptr_config_element->samp_freq_index > 11) { return IA_ENHAACPLUS_DEC_EXE_NONFATAL_DECODE_FRAME_ERROR; } tmp = ixheaacd_read_bits_buf(it_bit_buff, 21); count += ptr_config_element->num_front_channel_elements = (tmp >> 17); count += ptr_config_element->num_side_channel_elements = (tmp & 0x1E000) >> 13; count += ptr_config_element->num_back_channel_elements = (tmp & 0x1E00) >> 9; count += ptr_config_element->num_lfe_channel_elements = (tmp & 0x180) >> 7; ptr_config_element->num_assoc_data_elements = (tmp & 0x70) >> 4; count += ptr_config_element->num_valid_cc_elements = tmp & 0xF; if (count > MAX_BS_ELEMENT) { return IA_ENHAACPLUS_DEC_INIT_FATAL_STREAM_CHAN_GT_MAX; } ixheaacd_read_pce_mixdown_data(it_bit_buff, 1, 4); ixheaacd_read_pce_mixdown_data(it_bit_buff, 1, 4); ixheaacd_read_pce_mixdown_data(it_bit_buff, 1, 3); num_ch += ixheaacd_read_pce_channel_info( ptr_config_element->num_front_channel_elements, ptr_config_element->front_element_is_cpe, ptr_config_element->front_element_tag_select, it_bit_buff); num_ch += ixheaacd_read_pce_channel_info( ptr_config_element->num_side_channel_elements, ptr_config_element->side_element_is_cpe, ptr_config_element->side_element_tag_select, it_bit_buff); num_ch += ixheaacd_read_pce_channel_info( ptr_config_element->num_back_channel_elements, ptr_config_element->back_element_is_cpe, ptr_config_element->back_element_tag_select, it_bit_buff); num_ch += ptr_config_element->num_lfe_channel_elements; for (i = 0; i < (ptr_config_element->num_lfe_channel_elements); i++) { ptr_config_element->lfe_element_tag_select[i] = ixheaacd_read_bits_buf(it_bit_buff, 4); } ptr_config_element->channels = num_ch; for (i = 0; i < (ptr_config_element->num_assoc_data_elements); i++) { ixheaacd_read_bits_buf(it_bit_buff, 4); } ixheaacd_skip_bits(it_bit_buff, 5, ptr_config_element->num_valid_cc_elements); { WORD32 bits_to_read = ptr_config_element->alignment_bits; if (bits_to_read <= it_bit_buff->bit_pos) { bits_to_read = it_bit_buff->bit_pos - bits_to_read; } else { bits_to_read = 8 - (bits_to_read) + it_bit_buff->bit_pos; } tmp = ixheaacd_read_bits_buf(it_bit_buff, bits_to_read); } tmp = ixheaacd_read_bits_buf(it_bit_buff, 8); ixheaacd_skip_bits(it_bit_buff, 8, tmp); return 0; } WORD ixheaacd_decode_pce(struct ia_bit_buf_struct *it_bit_buff, UWORD32 *ui_pce_found_in_hdr, ia_program_config_struct *ptr_prog_config) { WORD32 error_code = 0; if (*ui_pce_found_in_hdr == 1 || *ui_pce_found_in_hdr == 3) { ia_program_config_struct ptr_config_element = {0}; ptr_config_element.alignment_bits = ptr_prog_config->alignment_bits; error_code = ixheaacd_read_prog_config_element(&ptr_config_element, it_bit_buff); *ui_pce_found_in_hdr = 3; } else { error_code = ixheaacd_read_prog_config_element(ptr_prog_config, it_bit_buff); *ui_pce_found_in_hdr = 2; } return error_code; } static PLATFORM_INLINE WORD32 ixheaacd_get_adif_header( ia_adif_header_struct *adif, struct ia_bit_buf_struct *it_bit_buff) { WORD32 i; WORD32 ret_val = 0, tmp; ixheaacd_read_bits_buf(it_bit_buff, 16); tmp = ixheaacd_read_bits_buf(it_bit_buff, 17); if (tmp & 0x1) { ixheaacd_skip_bits(it_bit_buff, 8, 9); } tmp = ixheaacd_read_bits_buf(it_bit_buff, 3); adif->bit_stream_type = (tmp & 0x1); ixheaacd_read_bits_buf(it_bit_buff, 23); tmp = ixheaacd_read_bits_buf(it_bit_buff, 4); for (i = 0; i <= tmp; i++) { if (adif->bit_stream_type == 0) { ixheaacd_read_bits_buf(it_bit_buff, 20); } adif->prog_config_present = 1; adif->str_prog_config.alignment_bits = 7; ret_val = ixheaacd_read_prog_config_element(&adif->str_prog_config, it_bit_buff); if (ret_val) { return ret_val; } } return 0; } WORD32 ixheaacd_find_syncword(ia_adts_header_struct *adts, struct ia_bit_buf_struct *it_bit_buff) { adts->sync_word = (WORD16)ixheaacd_read_bits_buf(it_bit_buff, 12); if (adts->sync_word == 0xFFF) { return 0; } while (1) { ixheaacd_read_bidirection(it_bit_buff, -4); if (it_bit_buff->cnt_bits < 12) { return IA_ENHAACPLUS_DEC_INIT_FATAL_DEC_INIT_FAIL; } adts->sync_word = (WORD16)ixheaacd_read_bits_buf(it_bit_buff, 12); if (adts->sync_word == 0xFFF) { ixheaacd_read_bidirection(it_bit_buff, -12); return IA_ENHAACPLUS_DEC_INIT_FATAL_DEC_INIT_FAIL; } } } WORD32 ixheaacd_adtsframe(ia_adts_header_struct *adts, struct ia_bit_buf_struct *it_bit_buff) { WORD32 tmp; IA_ERRORCODE err = IA_NO_ERROR; WORD32 crc_reg; ia_adts_crc_info_struct *ptr_adts_crc_info = it_bit_buff->pstr_adts_crc_info; ptr_adts_crc_info->crc_active = 1; ptr_adts_crc_info->no_reg = 0; ixheaacd_read_bidirection(it_bit_buff, -12); crc_reg = ixheaacd_adts_crc_start_reg(ptr_adts_crc_info, it_bit_buff, CRC_ADTS_HEADER_LEN); err = ixheaacd_find_syncword(adts, it_bit_buff); if (err) return err; tmp = ixheaacd_read_bits_buf(it_bit_buff, 10); adts->id = (tmp & 0x200) >> 9; adts->layer = (tmp & 0x180) >> 7; adts->protection_absent = (tmp & 0x40) >> 6; adts->profile = (tmp & 0x30) >> 4; { adts->profile++; } adts->samp_freq_index = (tmp & 0xF); if (((adts->profile != AAC_LC_PROFILE)) || (adts->samp_freq_index > 11)) { return IA_ENHAACPLUS_DEC_INIT_FATAL_DEC_INIT_FAIL; } tmp = ixheaacd_read_bits_buf(it_bit_buff, 21); adts->channel_configuration = (WORD32)(tmp & 0xE0000) >> 17; adts->aac_frame_length = (tmp & 0x1FFF); tmp = ixheaacd_read_bits_buf(it_bit_buff, 13); adts->no_raw_data_blocks = (tmp & 0x3); ixheaacd_adts_crc_end_reg(ptr_adts_crc_info, it_bit_buff, crc_reg); if (adts->protection_absent == 0) { ixheaacd_skip_bits(it_bit_buff, 16, adts->no_raw_data_blocks); adts->crc_check = ixheaacd_read_bits_buf(it_bit_buff, 16); ptr_adts_crc_info->crc_active = 1; ptr_adts_crc_info->file_value = adts->crc_check; } else ptr_adts_crc_info->crc_active = 0; ixheaacd_aac_bytealign(it_bit_buff); return 0; } WORD32 ixheaacd_get_samp_rate( struct ia_bit_buf_struct *it_bit_buff, ia_sampling_rate_info_struct *pstr_samp_rate_info, ia_audio_specific_config_struct *pstr_audio_specific_config) { WORD32 index; WORD32 sampling_rate; index = ixheaacd_read_bits_buf(it_bit_buff, 4); pstr_audio_specific_config->samp_frequency_index = index; if (index == 0x0F) { sampling_rate = ixheaacd_read_bits_buf(it_bit_buff, 24); if (pstr_audio_specific_config->audio_object_type != AOT_USAC) { if (sampling_rate < 9391) sampling_rate = 8000; else if ((sampling_rate >= 9391) && (sampling_rate < 11502)) sampling_rate = 11025; else if ((sampling_rate >= 11502) && (sampling_rate < 13856)) sampling_rate = 12000; else if ((sampling_rate >= 13856) && (sampling_rate < 18783)) sampling_rate = 16000; else if ((sampling_rate >= 18783) && (sampling_rate < 23004)) sampling_rate = 22050; else if ((sampling_rate >= 23004) && (sampling_rate < 27713)) sampling_rate = 24000; else if ((sampling_rate >= 27713) && (sampling_rate < 37566)) sampling_rate = 32000; else if ((sampling_rate >= 37566) && (sampling_rate < 46009)) sampling_rate = 44100; else if ((sampling_rate >= 46009) && (sampling_rate < 55426)) sampling_rate = 48000; else if ((sampling_rate >= 55426) && (sampling_rate < 75132)) sampling_rate = 64000; else if ((sampling_rate >= 75132) && (sampling_rate < 92017)) sampling_rate = 88200; else if (sampling_rate >= 92017) sampling_rate = 96000; } return sampling_rate; } else if ((index > 12) && (index < 15)) { return -1; } else { return ((pstr_samp_rate_info[index].sampling_frequency)); } } static int ixheaacd_get_ld_sbr_header( ia_bit_buf_struct *it_bit_buff, ia_sbr_header_data_struct *sbr_header_data) { WORD32 header_extra_1, header_extra_2; UWORD32 tmp, bit_cnt = 0; tmp = ixheaacd_read_bits_buf(it_bit_buff, 16); bit_cnt += 16; sbr_header_data->amp_res = (tmp & 0x8000) >> 15; sbr_header_data->start_freq = (tmp & 0x7800) >> 11; sbr_header_data->stop_freq = (tmp & 0x780) >> 7; sbr_header_data->xover_band = (tmp & 0x70) >> 4; header_extra_1 = (tmp & 0x0002) >> 1; header_extra_2 = (tmp & 0x0001); if (header_extra_1) { sbr_header_data->freq_scale = ixheaacd_read_bits_buf(it_bit_buff, 2); sbr_header_data->alter_scale = ixheaacd_read_bits_buf(it_bit_buff, 1); sbr_header_data->noise_bands = ixheaacd_read_bits_buf(it_bit_buff, 2); } else { sbr_header_data->freq_scale = 2; sbr_header_data->alter_scale = 1; sbr_header_data->noise_bands = 2; } if (header_extra_2) { sbr_header_data->limiter_bands = ixheaacd_read_bits_buf(it_bit_buff, 2); sbr_header_data->limiter_gains = ixheaacd_read_bits_buf(it_bit_buff, 2); sbr_header_data->interpol_freq = ixheaacd_read_bits_buf(it_bit_buff, 1); sbr_header_data->smoothing_mode = ixheaacd_read_bits_buf(it_bit_buff, 1); } else { sbr_header_data->limiter_bands = 2; sbr_header_data->limiter_gains = 2; sbr_header_data->interpol_freq = 1; sbr_header_data->smoothing_mode = 1; } return (bit_cnt); } WORD32 ixheaacd_eld_sbr_header(ia_bit_buf_struct *it_bit_buff, WORD32 channels, ia_sbr_header_data_struct *pstr_sbr_config) { int num_sbr_header, el, bit_cnt = 0; switch (channels) { default: num_sbr_header = 0; break; case 1: case 2: num_sbr_header = 1; break; case 3: num_sbr_header = 2; break; case 4: case 5: case 6: num_sbr_header = 3; break; case 7: num_sbr_header = 4; break; } for (el = 0; el < num_sbr_header; el++) { bit_cnt = ixheaacd_get_ld_sbr_header(it_bit_buff, pstr_sbr_config); } return (bit_cnt); } WORD32 ixheaacd_ga_hdr_dec(ia_aac_dec_state_struct *aac_state_struct, WORD32 header_len, WORD32 *bytes_consumed, ia_sampling_rate_info_struct *pstr_samp_rate_info, struct ia_bit_buf_struct *it_bit_buff) { WORD32 tmp; WORD32 cnt_bits = it_bit_buff->cnt_bits; WORD32 dummy = 0; UWORD32 aot_init; ia_audio_specific_config_struct *pstr_audio_specific_config; memset(aac_state_struct->ia_audio_specific_config, 0, sizeof(ia_audio_specific_config_struct)); memset(&(aac_state_struct->eld_specific_config), 0, sizeof(ia_eld_specific_config_struct)); pstr_audio_specific_config = aac_state_struct->ia_audio_specific_config; aac_state_struct->p_config->str_prog_config.alignment_bits = it_bit_buff->bit_pos; aot_init = aac_state_struct->audio_object_type; aac_state_struct->audio_object_type = ixheaacd_read_bits_buf(it_bit_buff, 5); if (aac_state_struct->audio_object_type == 31) { tmp = ixheaacd_read_bits_buf(it_bit_buff, 6); aac_state_struct->audio_object_type = 32 + tmp; } pstr_audio_specific_config->audio_object_type = aac_state_struct->audio_object_type; tmp = ixheaacd_get_samp_rate(it_bit_buff, pstr_samp_rate_info, pstr_audio_specific_config); pstr_audio_specific_config->sampling_frequency = tmp; if (tmp == -1) { *bytes_consumed = 1; return IA_ENHAACPLUS_DEC_INIT_FATAL_DEC_INIT_FAIL; } else aac_state_struct->sampling_rate = tmp; aac_state_struct->p_config->ui_samp_freq = tmp; aac_state_struct->ch_config = ixheaacd_read_bits_buf(it_bit_buff, 4); pstr_audio_specific_config->channel_configuration = aac_state_struct->ch_config; if (aac_state_struct->audio_object_type == AOT_SBR || aac_state_struct->audio_object_type == AOT_PS) { tmp = ixheaacd_get_samp_rate(it_bit_buff, pstr_samp_rate_info, pstr_audio_specific_config); aac_state_struct->sbr_present_flag = 1; if (tmp == -1) { *bytes_consumed = 1; return IA_ENHAACPLUS_DEC_INIT_FATAL_DEC_INIT_FAIL; } else aac_state_struct->extension_samp_rate = tmp; aac_state_struct->audio_object_type = ixheaacd_read_bits_buf(it_bit_buff, 5); } if (aac_state_struct->header_dec_done || aac_state_struct->ui_init_done) { if (aac_state_struct->audio_object_type != aot_init) return IA_FATAL_ERROR; } if (((aac_state_struct->audio_object_type >= AOT_AAC_MAIN && aac_state_struct->audio_object_type <= AOT_AAC_LTP) || aac_state_struct->audio_object_type == AOT_AAC_SCAL || aac_state_struct->audio_object_type == AOT_TWIN_VQ || aac_state_struct->audio_object_type == AOT_ER_AAC_LD || aac_state_struct->audio_object_type == AOT_ER_AAC_ELD || aac_state_struct->audio_object_type == AOT_ER_AAC_LC) && aac_state_struct->audio_object_type != AOT_USAC) { aac_state_struct->usac_flag = 0; aac_state_struct->frame_len_flag = ixheaacd_read_bits_buf(it_bit_buff, 1); if (aac_state_struct->audio_object_type != AOT_ER_AAC_ELD) { aac_state_struct->depends_on_core_coder = ixheaacd_read_bits_buf(it_bit_buff, 1); aac_state_struct->extension_flag = ixheaacd_read_bits_buf(it_bit_buff, 1); if (aac_state_struct->ch_config == 0) { WORD32 error_code; error_code = ixheaacd_read_prog_config_element( &aac_state_struct->p_config->str_prog_config, it_bit_buff); if (error_code != 0) { *bytes_consumed = 1; return error_code; } aac_state_struct->p_config->ui_pce_found_in_hdr = 1; } } if (aac_state_struct->audio_object_type == AOT_ER_AAC_ELD || aac_state_struct->audio_object_type == AOT_ER_AAC_LD) { aac_state_struct->eld_specific_config.aac_sect_data_resil_flag = 0; aac_state_struct->eld_specific_config.aac_sf_data_resil_flag = 0; aac_state_struct->eld_specific_config.aac_spect_data_resil_flag = 0; aac_state_struct->eld_specific_config.ep_config = 0; if ((aac_state_struct->extension_flag == 1) || aac_state_struct->audio_object_type == AOT_ER_AAC_ELD) { if (aac_state_struct->audio_object_type >= ER_OBJECT_START) { aac_state_struct->eld_specific_config.aac_sect_data_resil_flag = ixheaacd_read_bits_buf(it_bit_buff, 1); aac_state_struct->eld_specific_config.aac_sf_data_resil_flag = ixheaacd_read_bits_buf(it_bit_buff, 1); aac_state_struct->eld_specific_config.aac_spect_data_resil_flag = ixheaacd_read_bits_buf(it_bit_buff, 1); if (aac_state_struct->audio_object_type != AOT_ER_AAC_ELD) aac_state_struct->eld_specific_config.ep_config = ixheaacd_read_bits_buf(it_bit_buff, 2); else aac_state_struct->eld_specific_config.ld_sbr_flag_present = ixheaacd_read_bits_buf(it_bit_buff, 1); } } } } if (pstr_audio_specific_config->audio_object_type == AOT_USAC) { { pstr_audio_specific_config->sbr_present_flag = 0; pstr_audio_specific_config->ext_audio_object_type = 0; } {{size_t tmp = 0xf; UWORD32 i; WORD32 err = 0; aac_state_struct->usac_flag = 1; ixheaacd_conf_default(&(pstr_audio_specific_config->str_usac_config)); err = ixheaacd_config(it_bit_buff, &(pstr_audio_specific_config->str_usac_config), &(pstr_audio_specific_config->channel_configuration)); if (err != 0) return err; pstr_audio_specific_config->sampling_frequency = pstr_audio_specific_config->str_usac_config.usac_sampling_frequency; if (pstr_audio_specific_config->audio_object_type == AOT_USAC) { pstr_audio_specific_config->sbr_present_flag = 1; pstr_audio_specific_config->ext_audio_object_type = AOT_SBR; pstr_audio_specific_config->ext_sampling_frequency = pstr_audio_specific_config->sampling_frequency; pstr_audio_specific_config->ext_samp_frequency_index = pstr_audio_specific_config->samp_frequency_index; for (i = 0; i < sizeof(ixheaacd_sampl_freq_idx_table) / sizeof(ixheaacd_sampl_freq_idx_table[0]); i++) { if (ixheaacd_sampl_freq_idx_table[i] == (int)(pstr_audio_specific_config->sampling_frequency)) { tmp = i; break; } } pstr_audio_specific_config->samp_frequency_index = (UINT32)tmp; } else { pstr_audio_specific_config->sbr_present_flag = 0; } } } { dummy = ixheaacd_skip_bits_buf(it_bit_buff, it_bit_buff->cnt_bits); if ((SIZE_T)it_bit_buff->ptr_read_next == (SIZE_T)it_bit_buff->ptr_bit_buf_base) { *bytes_consumed = ((WORD32)it_bit_buff->size) >> 3; } else { *bytes_consumed = (((((SIZE_T)it_bit_buff->ptr_read_next - (SIZE_T)it_bit_buff->ptr_bit_buf_base)) << 3) + 7 - it_bit_buff->bit_pos + 7) >> 3; } } return 0; } aac_state_struct->frame_length = FRAME_SIZE; if (aac_state_struct->frame_len_flag) #ifdef ALLOW_SMALL_FRAMELENGTH aac_state_struct->frame_length = FRAME_SIZE_SMALL; #else return -1; #endif if (aac_state_struct->extension_flag) aac_state_struct->extension_flag_3 = ixheaacd_read_bits_buf(it_bit_buff, 1); if (aac_state_struct->audio_object_type == AOT_ER_AAC_LD) aac_state_struct->frame_length >>= 1; if (aac_state_struct->audio_object_type == AOT_ER_AAC_ELD) { aac_state_struct->frame_length >>= 1; if (aac_state_struct->eld_specific_config.ld_sbr_flag_present) { aac_state_struct->eld_specific_config.ld_sbr_samp_rate = ixheaacd_read_bits_buf(it_bit_buff, 1); aac_state_struct->eld_specific_config.ld_sbr_crc_flag = ixheaacd_read_bits_buf(it_bit_buff, 1); ixheaacd_eld_sbr_header(it_bit_buff, aac_state_struct->ch_config, &aac_state_struct->str_sbr_config); aac_state_struct->dwnsmp_signal = !aac_state_struct->eld_specific_config.ld_sbr_samp_rate; } ixheaacd_read_bits_buf(it_bit_buff, 1); } if (aac_state_struct->audio_object_type == AOT_ER_AAC_ELD) { int ep_config = ixheaacd_read_bits_buf(it_bit_buff, 2); if (ep_config == 2 || ep_config == 3) { } if (ep_config == 3) { int direct_map = ixheaacd_read_bits_buf(it_bit_buff, 1); if (!direct_map) { } } } tmp = (header_len * 8) - it_bit_buff->cnt_bits; if (aac_state_struct->audio_object_type != AOT_SBR && (it_bit_buff->cnt_bits >= 16)) { tmp = ixheaacd_read_bits_buf(it_bit_buff, 11); if (tmp == 0x2b7) { tmp = ixheaacd_read_bits_buf(it_bit_buff, 5); if (tmp == AOT_SBR) { WORD32 sbr_present_flag = ixheaacd_read_bits_buf(it_bit_buff, 1); if (sbr_present_flag) { tmp = ixheaacd_get_samp_rate(it_bit_buff, pstr_samp_rate_info, pstr_audio_specific_config); if (tmp == -1) { *bytes_consumed = 1; return IA_ENHAACPLUS_DEC_INIT_FATAL_DEC_INIT_FAIL; } else aac_state_struct->extension_samp_rate = tmp; if (it_bit_buff->cnt_bits >= 12) { tmp = ixheaacd_read_bits_buf(it_bit_buff, 11); if (tmp == 0x548) { tmp = ixheaacd_read_bits_buf(it_bit_buff, 1); } } } } } else if (aac_state_struct->bs_format == LOAS_BSFORMAT) { ixheaacd_read_bidirection(it_bit_buff, -11); } } if (aac_state_struct->audio_object_type != AOT_AAC_LC && aac_state_struct->audio_object_type != AOT_SBR && aac_state_struct->audio_object_type != AOT_PS && aac_state_struct->audio_object_type != AOT_ER_AAC_LC && aac_state_struct->audio_object_type != AOT_ER_AAC_LD && aac_state_struct->audio_object_type != AOT_ER_AAC_ELD && aac_state_struct->audio_object_type != AOT_AAC_LTP) { *bytes_consumed = 1; return IA_ENHAACPLUS_DEC_INIT_FATAL_AUDIOOBJECTTYPE_NOT_SUPPORTED; } else { if (aac_state_struct->bs_format == LOAS_BSFORMAT) { *bytes_consumed = (cnt_bits - it_bit_buff->cnt_bits) >> 3; if (it_bit_buff->bit_pos < 7) *bytes_consumed += 1; } else *bytes_consumed = header_len; return 0; } } WORD32 ixheaacd_check_if_adts(ia_adts_header_struct *adts, struct ia_bit_buf_struct *it_bit_buff, WORD32 usr_max_ch) { WORD32 max_frm_len_per_ch, result = 0; result = ixheaacd_adtsframe(adts, it_bit_buff); max_frm_len_per_ch = ixheaacd_mult32(768, (adts->no_raw_data_blocks + 1)); if (adts->channel_configuration != 0) max_frm_len_per_ch = ixheaacd_mult32(max_frm_len_per_ch, adts->channel_configuration); else max_frm_len_per_ch = max_frm_len_per_ch * usr_max_ch; return ((result != 0) || (adts->aac_frame_length < 8) || (adts->layer != 0) || (adts->profile != AAC_LC_PROFILE)); } IA_ERRORCODE ixheaacd_latm_header_decode( ia_aac_dec_state_struct *aac_state_struct, struct ia_bit_buf_struct *it_bit_buff, WORD32 *bytes_consumed, ia_sampling_rate_info_struct *pstr_samp_rate_info) { WORD32 sync; IA_ERRORCODE result; WORD32 next_sync, audio_mux_len_bytes_last; WORD32 audio_mux_len_bits_last; WORD32 sync_status = aac_state_struct->sync_status; WORD32 bit_count = aac_state_struct->bit_count; WORD32 cnt_bits = it_bit_buff->cnt_bits; *bytes_consumed = 0; aac_state_struct->bs_format = LOAS_BSFORMAT; if (sync_status == 0) { do { sync = ixheaacd_read_bits_buf(it_bit_buff, 11); bit_count += 11; while (sync != 0x2B7) { sync = ((sync & 0x3ff) << 1) | ixheaacd_read_bits_buf(it_bit_buff, 1); bit_count += 1; if (it_bit_buff->cnt_bits < 13) { ixheaacd_read_bidirection(it_bit_buff, -11); *bytes_consumed = (cnt_bits - it_bit_buff->cnt_bits) / 8; return (IA_ENHAACPLUS_DEC_INIT_NONFATAL_HEADER_NOT_AT_START); } } audio_mux_len_bytes_last = ixheaacd_read_bits_buf(it_bit_buff, 13); bit_count += 13; audio_mux_len_bits_last = audio_mux_len_bytes_last << 3; if (it_bit_buff->cnt_bits >= (audio_mux_len_bits_last + 11)) { ixheaacd_read_bidirection(it_bit_buff, audio_mux_len_bits_last); bit_count += audio_mux_len_bits_last; next_sync = ixheaacd_read_bits_buf(it_bit_buff, 11); bit_count += 11; if (next_sync == 0x2B7) { ixheaacd_read_bidirection(it_bit_buff, -(11 + audio_mux_len_bits_last + 13 + 11)); bit_count -= 11 + audio_mux_len_bits_last + 13 + 11; break; } else { ixheaacd_read_bidirection(it_bit_buff, -(audio_mux_len_bits_last + 24 + 11 - 1)); bit_count -= audio_mux_len_bits_last + 24 + 11 - 1; } } else { ixheaacd_read_bidirection(it_bit_buff, -(13 + 11)); bit_count -= (13 + 11); *bytes_consumed = (cnt_bits - it_bit_buff->cnt_bits) / 8; return IA_ENHAACPLUS_DEC_EXE_NONFATAL_INSUFFICIENT_INPUT_BYTES; } } while (1); do { WORD32 audio_mux_len_bytes_last; WORD32 use_same_stream_mux; sync = ixheaacd_read_bits_buf(it_bit_buff, 11); bit_count += 11; if (sync != 0x2b7) { ixheaacd_read_bidirection(it_bit_buff, -25); bit_count -= 11; *bytes_consumed = (cnt_bits - it_bit_buff->cnt_bits) / 8; return IA_ENHAACPLUS_DEC_INIT_NONFATAL_HEADER_NOT_AT_START; } audio_mux_len_bytes_last = ixheaacd_read_bits_buf(it_bit_buff, 13); bit_count += 13; use_same_stream_mux = ixheaacd_read_bits_buf(it_bit_buff, 1); bit_count += 1; if (it_bit_buff->cnt_bits - (audio_mux_len_bytes_last * 8 - 1 + 11) < 0) { ixheaacd_read_bidirection(it_bit_buff, -25); bit_count -= 25; aac_state_struct->bit_count = bit_count; *bytes_consumed = (cnt_bits - it_bit_buff->cnt_bits) / 8; return IA_ENHAACPLUS_DEC_INIT_NONFATAL_HEADER_NOT_AT_START; } if (!use_same_stream_mux) { ixheaacd_read_bidirection(it_bit_buff, -25); bit_count -= 25; sync_status = 1; aac_state_struct->sync_status = sync_status; break; } ixheaacd_read_bidirection(it_bit_buff, audio_mux_len_bytes_last * 8 - 1); bit_count += audio_mux_len_bytes_last * 8 - 1; } while (sync_status == 0); *bytes_consumed = (cnt_bits - it_bit_buff->cnt_bits) / 8; { ixheaacd_latm_struct latm_struct_element; WORD32 sync; memset(&latm_struct_element, 0, sizeof(ixheaacd_latm_struct)); sync = ixheaacd_read_bits_buf(it_bit_buff, 11); if (sync == 0x2b7) { result = ixheaacd_latm_audio_mux_element( it_bit_buff, &latm_struct_element, aac_state_struct, pstr_samp_rate_info); if (result != 0) { sync_status = 0; aac_state_struct->sync_status = sync_status; *bytes_consumed += 1; return result; } } } } return IA_NO_ERROR; } WORD32 ixheaacd_aac_headerdecode( ia_exhaacplus_dec_api_struct *p_obj_exhaacplus_dec, UWORD8 *buffer, WORD32 *bytes_consumed, const ia_aac_dec_huffman_tables_struct *pstr_huffmann_tables) { struct ia_bit_buf_struct it_bit_buff = {0}, *handle_bit_buff; ia_adif_header_struct adif = {0}; ia_adts_header_struct adts = {0}; WORD32 result; WORD32 header_len; WORD32 sync = 0; WORD32 disable_sync = p_obj_exhaacplus_dec->aac_config.ui_disable_sync; WORD32 is_ga_header = p_obj_exhaacplus_dec->aac_config.ui_mp4_flag; WORD32 loas_present = p_obj_exhaacplus_dec->aac_config.loas_present; ia_aac_dec_state_struct *aac_state_struct = p_obj_exhaacplus_dec->pp_mem_aac[IA_ENHAACPLUS_DEC_PERSIST_IDX]; WORD32 usr_max_ch = aac_state_struct->p_config->ui_max_channels; ia_sampling_rate_info_struct *pstr_samp_rate_info = (ia_sampling_rate_info_struct *)&pstr_huffmann_tables ->str_sample_rate_info[0]; if (buffer == 0) { return IA_ENHAACPLUS_DEC_INIT_FATAL_DEC_INIT_FAIL; } header_len = aac_state_struct->ui_in_bytes; handle_bit_buff = ixheaacd_create_bit_buf(&it_bit_buff, (UWORD8 *)buffer, (WORD16)header_len); handle_bit_buff->cnt_bits += (header_len << 3); handle_bit_buff->xaac_jmp_buf = &aac_state_struct->xaac_jmp_buf; if (is_ga_header == 1) { return ixheaacd_ga_hdr_dec(aac_state_struct, header_len, bytes_consumed, pstr_samp_rate_info, handle_bit_buff); } else if (loas_present) { return ixheaacd_latm_header_decode(aac_state_struct, &it_bit_buff, bytes_consumed, pstr_samp_rate_info); } else { WORD32 header_found = 0; WORD32 bytes_taken = -1; WORD32 prev_offset = 0; WORD32 run_once = 1; if (disable_sync == 0) run_once = 0; do { bytes_taken++; buffer += (bytes_taken - prev_offset); prev_offset = bytes_taken; handle_bit_buff = ixheaacd_create_bit_buf( &it_bit_buff, (UWORD8 *)buffer, (WORD16)(header_len - bytes_taken)); handle_bit_buff->cnt_bits += (8 * (header_len - bytes_taken)); handle_bit_buff->pstr_adts_crc_info = &handle_bit_buff->str_adts_crc_info; ixheaacd_adts_crc_open(handle_bit_buff->pstr_adts_crc_info); if ((buffer[0] == 'A') && (buffer[1] == 'D') && (buffer[2] == 'I') && (buffer[3] == 'F')) { adif.prog_config_present = 0; result = ixheaacd_get_adif_header(&adif, handle_bit_buff); if (result == 0) { if (adif.prog_config_present == 1) { aac_state_struct->p_config->ui_pce_found_in_hdr = 1; aac_state_struct->p_config->str_prog_config = adif.str_prog_config; } aac_state_struct->s_adif_hdr_present = 1; aac_state_struct->audio_object_type = adif.str_prog_config.object_type; aac_state_struct->sampling_rate = pstr_samp_rate_info[adif.str_prog_config.samp_freq_index] .sampling_frequency; aac_state_struct->ch_config = adif.str_prog_config.channels; bytes_taken += ((handle_bit_buff->size - handle_bit_buff->cnt_bits) >> 3); header_found = 1; aac_state_struct->frame_length = FRAME_SIZE; if (aac_state_struct->audio_object_type == AOT_ER_AAC_LD) aac_state_struct->frame_length >>= 1; } } else if ((sync = ixheaacd_read_bits_buf(&it_bit_buff, 12)) == 0xfff) { result = ixheaacd_check_if_adts(&adts, handle_bit_buff, usr_max_ch); if (result != 0) { continue; } if ((adts.aac_frame_length + ADTS_HEADER_LENGTH) < (header_len - bytes_taken)) { ia_adts_header_struct adts_loc = {0}; ixheaacd_create_init_bit_buf( &it_bit_buff, (UWORD8 *)(buffer + adts.aac_frame_length), (WORD16)(header_len - bytes_taken - adts.aac_frame_length)); handle_bit_buff = &it_bit_buff; adts_loc.sync_word = (WORD16)ixheaacd_read_bits_buf(handle_bit_buff, 12); if (adts_loc.sync_word != 0xFFF) { continue; } result = ixheaacd_check_if_adts(&adts_loc, handle_bit_buff, usr_max_ch); if ((result != 0) || (adts.samp_freq_index != adts_loc.samp_freq_index) || (adts.channel_configuration != adts_loc.channel_configuration)) { continue; } } { WORD32 obj_type; obj_type = adts.profile; aac_state_struct->audio_object_type = obj_type; aac_state_struct->sampling_rate = ((pstr_samp_rate_info[adts.samp_freq_index].sampling_frequency)); aac_state_struct->ch_config = adts.channel_configuration; aac_state_struct->s_adts_hdr_present = 1; header_found = 1; aac_state_struct->bs_format = ADTS_BSFORMAT; aac_state_struct->frame_length = FRAME_SIZE; if (aac_state_struct->audio_object_type == AOT_ER_AAC_LD) aac_state_struct->frame_length >>= 1; } } else if (0x2b7 == (sync >> 1)) { ixheaacd_read_bidirection(&it_bit_buff, -12); result = ixheaacd_latm_header_decode(aac_state_struct, &it_bit_buff, bytes_consumed, pstr_samp_rate_info); if (result != 0) { if ((result == (WORD32) IA_ENHAACPLUS_DEC_EXE_NONFATAL_INSUFFICIENT_INPUT_BYTES) || (result == (WORD32)IA_ENHAACPLUS_DEC_INIT_FATAL_STREAM_CHAN_GT_MAX)) { bytes_taken += *bytes_consumed; *bytes_consumed = bytes_taken; return result; } else if (result == -1) return -1; else if (result == (WORD32)IA_FATAL_ERROR) return IA_FATAL_ERROR; else bytes_taken += *bytes_consumed - 1; continue; } header_found = 1; aac_state_struct->bs_format = LOAS_BSFORMAT; bytes_taken += *bytes_consumed; } } while ((header_found == 0 && ((bytes_taken + 1) < (header_len - 68))) && run_once != 1); if (header_found == 0 && disable_sync == 1) { WORD32 err_code; ixheaacd_read_bidirection(&it_bit_buff, -12); err_code = ixheaacd_ga_hdr_dec(aac_state_struct, header_len, bytes_consumed, pstr_samp_rate_info, handle_bit_buff); if (err_code == 0) p_obj_exhaacplus_dec->aac_config.ui_mp4_flag = 1; return err_code; } switch (aac_state_struct->audio_object_type) { case AOT_AAC_MAIN: case AOT_AAC_LC: case AOT_AAC_SSR: case AOT_AAC_LTP: case AOT_AAC_SCAL: case AOT_TWIN_VQ: case AOT_ER_AAC_LD: case AOT_ER_AAC_ELD: case AOT_ER_AAC_LC: case AOT_USAC: break; default: return IA_ENHAACPLUS_DEC_INIT_FATAL_AUDIOOBJECTTYPE_NOT_SUPPORTED; } if (aac_state_struct->audio_object_type != AOT_USAC) aac_state_struct->usac_flag = 0; *bytes_consumed = bytes_taken; if ((handle_bit_buff->cnt_bits < 0) && (handle_bit_buff->size < (usr_max_ch * (IA_ENHAACPLUS_DEC_INP_BUF_SIZE << 3)))) { return (WORD16)( (WORD32)IA_ENHAACPLUS_DEC_EXE_NONFATAL_INSUFFICIENT_INPUT_BYTES); } if (header_found == 0) { *bytes_consumed = bytes_taken + 1; return IA_ENHAACPLUS_DEC_INIT_NONFATAL_HEADER_NOT_AT_START; } else { return 0; } } }