| /****************************************************************************** |
| * * |
| * 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 <string.h> |
| #include "ixheaacd_sbr_common.h" |
| #include <ixheaacd_type_def.h> |
| |
| #include "ixheaacd_constants.h" |
| #include <ixheaacd_basic_ops32.h> |
| #include <ixheaacd_basic_ops16.h> |
| #include <ixheaacd_basic_ops40.h> |
| #include "ixheaacd_basic_ops.h" |
| |
| #include "ixheaacd_bitbuffer.h" |
| #include "ixheaacd_error_codes.h" |
| #include "ixheaacd_defines.h" |
| #include <ixheaacd_aac_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_cnst.h" |
| #include "ixheaacd_drc_dec.h" |
| #include "ixheaacd_sbrdecoder.h" |
| |
| #include "ixheaacd_block.h" |
| #include "ixheaacd_channel.h" |
| |
| #include "ixheaacd_common_rom.h" |
| #include "ixheaacd_basic_funcs.h" |
| #include <ixheaacd_basic_op.h> |
| #include "ixheaacd_intrinsics.h" |
| #include "ixheaacd_stereo.h" |
| |
| #include "ixheaacd_tns.h" |
| |
| #include "ixheaacd_audioobjtypes.h" |
| #include "ixheaacd_latmdemux.h" |
| |
| #include "ixheaacd_aacdec.h" |
| #include "ixheaacd_definitions.h" |
| |
| #include "ixheaacd_error_codes.h" |
| |
| #include "ixheaacd_pulsedata.h" |
| |
| #include "ixheaacd_sbrdecsettings.h" |
| #include "ixheaacd_sbr_scale.h" |
| #include "ixheaacd_env_extr_part.h" |
| #include <ixheaacd_sbr_rom.h> |
| #include "ixheaacd_audioobjtypes.h" |
| #include "ixheaacd_sbrdecoder.h" |
| #include "ixheaacd_memory_standards.h" |
| #include "ixheaacd_mps_polyphase.h" |
| #include "ixheaacd_config.h" |
| #include "ixheaacd_mps_dec.h" |
| #include "ixheaacd_struct_def.h" |
| #include "ixheaacd_adts_crc_check.h" |
| #include "ixheaacd_rvlc.h" |
| #include "ixheaacd_hcr.h" |
| #include "ixheaacd_function_selector.h" |
| |
| #define SPEC(ptr, w, gl) ((ptr) + ((w) * (gl))) |
| |
| #define _SWAP(a, b) \ |
| (b = (((WORD32)a[0] << 24) | ((WORD32)a[1] << 16) | ((WORD32)a[2] << 8) | \ |
| ((WORD32)a[3]))) |
| |
| UWORD32 ixheaacd_aac_showbits_32(UWORD8 *ptr_read_next) { |
| UWORD8 *v = ptr_read_next; |
| UWORD32 b = 0; |
| |
| _SWAP(v, b); |
| return b; |
| } |
| |
| WORD16 *ixheaacd_getscalefactorbandoffsets( |
| ia_ics_info_struct *ptr_ics_info, |
| ia_aac_dec_tables_struct *ptr_aac_tables) { |
| if (ptr_ics_info->window_sequence != EIGHT_SHORT_SEQUENCE) { |
| return ptr_aac_tables->sfb_long_table; |
| } else { |
| return ptr_aac_tables->sfb_short_table; |
| } |
| } |
| |
| WORD8 *ixheaacd_getscalefactorbandwidth( |
| ia_ics_info_struct *ptr_ics_info, |
| ia_aac_dec_tables_struct *ptr_aac_tables) { |
| if (ptr_ics_info->frame_length == 512) { |
| return ( |
| WORD8 *)(&ptr_aac_tables |
| ->scale_fac_bands_512[ptr_ics_info->sampling_rate_index] |
| [0]); |
| } else { |
| return ( |
| WORD8 *)(&ptr_aac_tables |
| ->scale_fac_bands_480[ptr_ics_info->sampling_rate_index] |
| [0]); |
| } |
| } |
| |
| WORD32 ixheaacd_cblock_inv_quant_spect_data( |
| ia_aac_dec_channel_info_struct *ptr_aac_dec_channel_info, |
| ia_aac_dec_tables_struct *ptr_aac_tables); |
| |
| void ixheaacd_cblock_scale_spect_data( |
| ia_aac_dec_channel_info_struct *ptr_aac_dec_channel_info, |
| ia_aac_dec_tables_struct *ptr_aac_tables, WORD32 total_channels, |
| WORD32 object_type, WORD32 aac_sf_data_resil_flag) { |
| int grp_win, group = 0; |
| WORD32 *ptr_spect_coeff = ptr_aac_dec_channel_info->ptr_spec_coeff; |
| WORD8 *ptr_sfb_width = (WORD8 *)(ixheaacd_getscalefactorbandwidth( |
| &(ptr_aac_dec_channel_info->str_ics_info), ptr_aac_tables)); |
| int max_band; |
| WORD16 *ptr_scale_fac = ptr_aac_dec_channel_info->ptr_scale_factor; |
| WORD tot_bands = ptr_aac_dec_channel_info->str_ics_info.max_sfb; |
| WORD tot_groups = ptr_aac_dec_channel_info->str_ics_info.num_window_groups; |
| WORD32 *scale_table_ptr = ptr_aac_tables->pstr_block_tables->scale_table; |
| |
| max_band = ptr_aac_dec_channel_info->str_ics_info.max_sfb; |
| |
| do { |
| grp_win = |
| ptr_aac_dec_channel_info->str_ics_info.window_group_length[group++]; |
| do { |
| (*ixheaacd_scale_factor_process)(&ptr_spect_coeff[0], &ptr_scale_fac[0], |
| tot_bands, (WORD8 *)ptr_sfb_width, |
| scale_table_ptr, total_channels, |
| object_type, aac_sf_data_resil_flag); |
| ptr_spect_coeff += 128; |
| grp_win--; |
| } while (grp_win != 0); |
| |
| ptr_scale_fac += 16; |
| tot_groups--; |
| } while (tot_groups != 0); |
| } |
| |
| WORD32 ixheaacd_read_pulse_data(ia_bit_buf_struct *it_bit_buff, |
| ia_pulse_info_struct *ptr_pulse_info, |
| ia_aac_dec_tables_struct *ptr_aac_tables) { |
| WORD32 i, total_offset; |
| WORD32 error_code = 0; |
| |
| WORD32 value = ixheaacd_read_bits_buf(it_bit_buff, 8); |
| ptr_pulse_info->number_pulse = value >> 6; |
| ptr_pulse_info->pulse_start_band = value & 0x3F; |
| |
| if (ptr_pulse_info->pulse_start_band >= 52) { |
| return (WORD32)IA_ENHAACPLUS_DEC_EXE_NONFATAL_PULSEDATA_ERROR; |
| } |
| |
| total_offset = ptr_aac_tables->str_aac_sfb_info[0] |
| .sfb_index[ptr_pulse_info->pulse_start_band]; |
| |
| for (i = 0; i < ptr_pulse_info->number_pulse + 1; i++) { |
| WORD32 value = ixheaacd_read_bits_buf(it_bit_buff, 9); |
| ptr_pulse_info->pulse_offset[i] = value >> 4; |
| ptr_pulse_info->pulse_amp[i] = value & 0xF; |
| total_offset += ptr_pulse_info->pulse_offset[i]; |
| |
| if (total_offset >= 1024) { |
| error_code = (WORD32)IA_ENHAACPLUS_DEC_EXE_NONFATAL_PULSEDATA_ERROR; |
| } |
| } |
| |
| return error_code; |
| } |
| |
| static WORD16 ixheaacd_read_block_data( |
| ia_bit_buf_struct *it_bit_buff, |
| ia_aac_dec_channel_info_struct *ptr_aac_dec_channel_info, |
| ia_aac_dec_tables_struct *ptr_aac_tables, WORD32 total_channels, |
| WORD32 frame_size, WORD32 object_type, WORD32 aac_spect_data_resil_flag, |
| WORD32 aac_sect_data_resil_flag, WORD32 aac_sf_data_resil_flag, |
| WORD32 ele_type, ia_aac_dec_overlap_info *ptr_aac_dec_static_channel_info) |
| |
| { |
| FLAG gain_control_data_present; |
| WORD16 error_code = AAC_DEC_OK; |
| |
| if (ptr_aac_dec_channel_info->str_ics_info.window_sequence == |
| EIGHT_SHORT_SEQUENCE) { |
| memset(ptr_aac_dec_channel_info->ptr_scale_factor, 0, |
| MAX_WINDOWS * MAX_SCALE_FACTOR_BANDS_SHORT * 3); |
| } |
| |
| error_code = ixheaacd_read_section_data( |
| it_bit_buff, ptr_aac_dec_channel_info, aac_spect_data_resil_flag, |
| aac_sect_data_resil_flag, ptr_aac_tables); |
| |
| if (error_code) { |
| return error_code; |
| } |
| if (aac_sf_data_resil_flag && |
| ((object_type == AOT_ER_AAC_ELD) || (object_type == AOT_ER_AAC_LD))) |
| ixheaacd_rvlc_read(it_bit_buff, ptr_aac_dec_channel_info); |
| else |
| ixheaacd_read_scale_factor_data(it_bit_buff, ptr_aac_dec_channel_info, |
| ptr_aac_tables, object_type); |
| |
| error_code = 0; |
| if (object_type != AOT_ER_AAC_ELD) { |
| ptr_aac_dec_channel_info->str_pulse_info.pulse_data_present = |
| ixheaacd_read_bits_buf(it_bit_buff, 1); |
| if (ptr_aac_dec_channel_info->str_pulse_info.pulse_data_present) { |
| error_code = ixheaacd_read_pulse_data( |
| it_bit_buff, &ptr_aac_dec_channel_info->str_pulse_info, |
| ptr_aac_tables); |
| } |
| |
| if (error_code) { |
| return error_code; |
| } |
| } |
| |
| ptr_aac_dec_channel_info->str_tns_info.tns_data_present = |
| (FLAG)ixheaacd_read_bits_buf(it_bit_buff, 1); |
| |
| if (object_type < ER_OBJECT_START) { |
| error_code = 0; |
| if (ptr_aac_dec_channel_info->str_tns_info.tns_data_present) { |
| error_code = |
| ixheaacd_read_tns_data(it_bit_buff, ptr_aac_dec_channel_info); |
| } |
| |
| if (error_code) { |
| return error_code; |
| } |
| } |
| |
| if (object_type != AOT_ER_AAC_ELD) { |
| gain_control_data_present = ixheaacd_read_bits_buf(it_bit_buff, 1); |
| |
| if (gain_control_data_present) { |
| return (WORD16)( |
| (WORD32)IA_ENHAACPLUS_DEC_EXE_NONFATAL_GAIN_CONTROL_DATA_PRESENT); |
| } |
| } |
| |
| if (object_type == AOT_ER_AAC_ELD) { |
| if (ptr_aac_dec_channel_info->str_tns_info.tns_data_present) |
| error_code = |
| ixheaacd_read_tns_data(it_bit_buff, ptr_aac_dec_channel_info); |
| } |
| |
| if (aac_spect_data_resil_flag && |
| ((object_type == AOT_ER_AAC_ELD) || (object_type == AOT_ER_AAC_LD))) |
| ixheaacd_hcr_read(it_bit_buff, ptr_aac_dec_channel_info, ele_type); |
| |
| if (aac_sf_data_resil_flag && |
| ((object_type == AOT_ER_AAC_ELD) || (object_type == AOT_ER_AAC_LD))) { |
| ixheaacd_rvlc_dec(ptr_aac_dec_channel_info, ptr_aac_dec_static_channel_info, |
| it_bit_buff); |
| |
| it_bit_buff->bit_pos = 7 - it_bit_buff->bit_pos; |
| } |
| |
| if (object_type == AOT_ER_AAC_LD) { |
| if (ptr_aac_dec_channel_info->str_tns_info.tns_data_present) |
| error_code = |
| ixheaacd_read_tns_data(it_bit_buff, ptr_aac_dec_channel_info); |
| } |
| |
| { it_bit_buff->bit_pos = 7 - it_bit_buff->bit_pos; } |
| |
| error_code |= ixheaacd_read_spectral_data( |
| it_bit_buff, ptr_aac_dec_channel_info, ptr_aac_tables, total_channels, |
| frame_size, object_type, aac_spect_data_resil_flag, |
| aac_sf_data_resil_flag); |
| |
| it_bit_buff->bit_pos = (7 - it_bit_buff->bit_pos); |
| |
| return error_code; |
| } |
| |
| WORD16 ixheaacd_ltp_decode(ia_bit_buf_struct *it_bit_buff, |
| ia_ics_info_struct *ptr_ics_info, WORD32 object_type, |
| WORD32 frame_size, WORD32 ch) { |
| WORD32 retval = AAC_DEC_OK; |
| |
| if (ptr_ics_info->predictor_data_present) { |
| if (ch == 0) { |
| ixheaacd_init_ltp_object(&(ptr_ics_info->ltp)); |
| ptr_ics_info->ltp.data_present = ixheaacd_read_bits_buf(it_bit_buff, 1); |
| if (ptr_ics_info->ltp.data_present) { |
| if ((retval = ixheaacd_ltp_data(object_type, ptr_ics_info, |
| &(ptr_ics_info->ltp), it_bit_buff, |
| frame_size)) > 0) { |
| return retval; |
| } |
| } |
| } else { |
| ixheaacd_init_ltp_object(&(ptr_ics_info->ltp2)); |
| ptr_ics_info->ltp2.data_present = ixheaacd_read_bits_buf(it_bit_buff, 1); |
| if (ptr_ics_info->ltp2.data_present) { |
| if ((retval = ixheaacd_ltp_data(object_type, ptr_ics_info, |
| &(ptr_ics_info->ltp2), it_bit_buff, |
| frame_size)) > 0) { |
| return retval; |
| } |
| } |
| } |
| } |
| return retval; |
| } |
| WORD16 ixheaacd_ics_read(ia_bit_buf_struct *it_bit_buff, |
| ia_ics_info_struct *ptr_ics_info, |
| WORD8 num_swb_window[2], WORD32 object_type, |
| WORD32 common_window, WORD32 frame_size) { |
| WORD i; |
| WORD mask; |
| WORD value = 0; |
| |
| if (object_type == AOT_ER_AAC_ELD) { |
| ptr_ics_info->window_sequence = 0; |
| ptr_ics_info->window_shape = 1; |
| } else { |
| if (object_type != AOT_ER_AAC_LD) { |
| ptr_ics_info->frame_length = 1024; |
| } |
| value = ixheaacd_read_bits_buf(it_bit_buff, 4); |
| ptr_ics_info->window_sequence = (WORD16)((value & 0x6) >> 1); |
| ptr_ics_info->window_shape = (WORD16)((value & 0x1)); |
| } |
| |
| if (ptr_ics_info->window_sequence != EIGHT_SHORT_SEQUENCE) { |
| ptr_ics_info->num_swb_window = num_swb_window[0]; |
| |
| ptr_ics_info->num_window_groups = 1; |
| ptr_ics_info->window_group_length[0] = 1; |
| |
| if (object_type == AOT_ER_AAC_ELD) { |
| ptr_ics_info->max_sfb = ixheaacd_read_bits_buf(it_bit_buff, 6); |
| if (ptr_ics_info->max_sfb == 0) ptr_ics_info->num_swb_window = 0; |
| } else { |
| value = ixheaacd_read_bits_buf(it_bit_buff, 7); |
| ptr_ics_info->max_sfb = (value & 0x7E) >> 1; |
| } |
| |
| if ((object_type != AOT_ER_AAC_LD) && (object_type != AOT_AAC_LTP)) { |
| if (value & 1) { |
| return (WORD16)( |
| (WORD32)IA_ENHAACPLUS_DEC_EXE_NONFATAL_PREDICTION_DATA_PRESENT); |
| } |
| |
| } else { |
| ptr_ics_info->predictor_data_present = value & 1; |
| |
| if (ptr_ics_info->predictor_data_present) { |
| WORD32 retval = AAC_DEC_OK; |
| |
| ixheaacd_init_ltp_object(&(ptr_ics_info->ltp)); |
| if (object_type < ER_OBJECT_START) { |
| if ((ptr_ics_info->ltp.data_present = |
| ixheaacd_read_bits_buf(it_bit_buff, 1)) & |
| 1) { |
| if ((retval = ixheaacd_ltp_data(object_type, ptr_ics_info, |
| &(ptr_ics_info->ltp), it_bit_buff, |
| frame_size)) > 0) { |
| return retval; |
| } |
| } |
| if (common_window) { |
| ixheaacd_init_ltp_object(&(ptr_ics_info->ltp2)); |
| if ((ptr_ics_info->ltp2.data_present = |
| ixheaacd_read_bits_buf(it_bit_buff, 1)) & |
| 1) { |
| if ((retval = ixheaacd_ltp_data(object_type, ptr_ics_info, |
| &(ptr_ics_info->ltp2), |
| it_bit_buff, frame_size)) > 0) { |
| return retval; |
| } |
| } |
| } |
| } |
| if ((object_type == AOT_ER_AAC_ELD) || (object_type == AOT_ER_AAC_LD)) { |
| if (!common_window && (object_type >= ER_OBJECT_START)) { |
| if ((ptr_ics_info->ltp.data_present = |
| ixheaacd_read_bits_buf(it_bit_buff, 1)) & |
| 1) { |
| if ((retval = ixheaacd_ltp_data(object_type, ptr_ics_info, |
| &(ptr_ics_info->ltp), it_bit_buff, |
| frame_size)) < 0) { |
| return retval; |
| } |
| } |
| } |
| } |
| } |
| } |
| |
| } else { |
| WORD32 num_groups = 0, scale_factor_grouping; |
| ptr_ics_info->num_swb_window = num_swb_window[1]; |
| |
| value = ixheaacd_read_bits_buf(it_bit_buff, 11); |
| ptr_ics_info->max_sfb = (value & 0x780) >> 7; |
| |
| scale_factor_grouping = (value & 0x7F); |
| |
| mask = 0x40; |
| for (i = 0; i < 7; i++) { |
| ptr_ics_info->window_group_length[i] = 1; |
| |
| if (scale_factor_grouping & mask) { |
| ptr_ics_info->window_group_length[num_groups] = |
| ptr_ics_info->window_group_length[num_groups] + 1; |
| |
| } else { |
| num_groups = num_groups + 1; |
| } |
| |
| mask = mask >> 1; |
| } |
| |
| ptr_ics_info->window_group_length[7] = 1; |
| ptr_ics_info->num_window_groups = num_groups + 1; |
| } |
| |
| if (ptr_ics_info->max_sfb > ptr_ics_info->num_swb_window) { |
| return (WORD16)IA_ENHAACPLUS_DEC_EXE_NONFATAL_EXCEEDS_SFB_TRANSMITTED; |
| } |
| |
| return AAC_DEC_OK; |
| } |
| |
| WORD16 ixheaacd_individual_ch_stream( |
| ia_bit_buf_struct *it_bit_buff, ia_aac_decoder_struct *aac_dec_handle, |
| WORD32 num_ch, WORD32 frame_size, WORD32 total_channels, WORD32 object_type, |
| ia_eld_specific_config_struct eld_specific_config, WORD32 ele_type) { |
| WORD16 error_code = AAC_DEC_OK; |
| WORD32 ch; |
| WORD32 crc_reg = 0; |
| |
| for (ch = 0; ch < num_ch; ch++) { |
| ia_aac_dec_channel_info_struct *ptr_aac_dec_ch_info = |
| aac_dec_handle->pstr_aac_dec_ch_info[ch]; |
| ia_ics_info_struct *ptr_ics_info = &ptr_aac_dec_ch_info->str_ics_info; |
| |
| if (ch == 1) { |
| if (it_bit_buff->pstr_adts_crc_info->crc_active == 1) { |
| crc_reg = |
| ixheaacd_adts_crc_start_reg(it_bit_buff->pstr_adts_crc_info, |
| it_bit_buff, CRC_ADTS_RAW_IIND_ICS); |
| } |
| } |
| ptr_aac_dec_ch_info->global_gain = |
| (WORD16)ixheaacd_read_bits_buf(it_bit_buff, 8); |
| |
| if (!(aac_dec_handle->pstr_aac_dec_ch_info[LEFT]->common_window)) { |
| error_code = ixheaacd_ics_read( |
| it_bit_buff, ptr_ics_info, aac_dec_handle->num_swb_window, |
| object_type, |
| aac_dec_handle->pstr_aac_dec_ch_info[LEFT]->common_window, |
| aac_dec_handle->samples_per_frame); |
| if (ch == 1) |
| aac_dec_handle->pstr_aac_dec_ch_info[ch - 1]->str_ics_info.ltp2.lag = |
| ptr_ics_info->ltp.lag; |
| |
| if (error_code) { |
| if (it_bit_buff->cnt_bits < 0) { |
| error_code = (WORD16)( |
| (WORD32)IA_ENHAACPLUS_DEC_EXE_NONFATAL_INSUFFICIENT_INPUT_BYTES); |
| } |
| return error_code; |
| } |
| } |
| |
| error_code = ixheaacd_read_block_data( |
| it_bit_buff, ptr_aac_dec_ch_info, aac_dec_handle->pstr_aac_tables, |
| total_channels, frame_size, object_type, |
| eld_specific_config.aac_spect_data_resil_flag, |
| eld_specific_config.aac_sect_data_resil_flag, |
| eld_specific_config.aac_sf_data_resil_flag, ele_type, |
| aac_dec_handle->pstr_aac_dec_overlap_info[ch]); |
| if (error_code) { |
| if (it_bit_buff->cnt_bits < 0) { |
| error_code = (WORD16)( |
| (WORD32)IA_ENHAACPLUS_DEC_EXE_NONFATAL_INSUFFICIENT_INPUT_BYTES); |
| } |
| |
| return error_code; |
| } |
| |
| if (ch == 0) { |
| if ((object_type == AOT_ER_AAC_LD) && |
| (aac_dec_handle->pstr_aac_dec_ch_info[LEFT]->common_window) && |
| (ele_type == ID_CPE)) { |
| WORD16 temp = |
| ixheaacd_ltp_decode(it_bit_buff, ptr_ics_info, object_type, |
| aac_dec_handle->samples_per_frame, 1); |
| |
| if (temp != 0) { |
| return temp; |
| } |
| aac_dec_handle->pstr_aac_dec_ch_info[ch + 1]->str_ics_info.ltp.lag = |
| ptr_ics_info->ltp2.lag; |
| } |
| } |
| if (ch == 1) { |
| if (it_bit_buff->pstr_adts_crc_info->crc_active == 1) { |
| ixheaacd_adts_crc_end_reg(it_bit_buff->pstr_adts_crc_info, it_bit_buff, |
| crc_reg); |
| } |
| } |
| } |
| |
| return error_code; |
| } |
| |
| VOID ixheaacd_read_ms_data( |
| ia_bit_buf_struct *it_bit_buff, |
| ia_aac_dec_channel_info_struct *ptr_aac_dec_ch_info) { |
| WORD32 num_win_group, sfb; |
| WORD32 ms_mask_present; |
| UWORD8 *ptr_ms_used = &ptr_aac_dec_ch_info->pstr_stereo_info->ms_used[0][0]; |
| WORD32 num_window_groups = |
| ptr_aac_dec_ch_info->str_ics_info.num_window_groups; |
| WORD16 max_sfb = ptr_aac_dec_ch_info->str_ics_info.max_sfb; |
| |
| ms_mask_present = ixheaacd_read_bits_buf(it_bit_buff, 2); |
| |
| if (ms_mask_present < 1) { |
| memset(ptr_ms_used, 0, |
| sizeof(UWORD8) * JOINT_STEREO_MAX_BANDS * JOINT_STEREO_MAX_GROUPS); |
| } |
| |
| else if (ms_mask_present == 1) { |
| for (num_win_group = 0; num_win_group < num_window_groups; |
| num_win_group++) { |
| for (sfb = 0; sfb < max_sfb; sfb++) { |
| ptr_aac_dec_ch_info->pstr_stereo_info->ms_used[num_win_group][sfb] = |
| (UWORD8)ixheaacd_read_bits_buf(it_bit_buff, 1); |
| } |
| } |
| |
| } else { |
| for (num_win_group = 0; num_win_group < num_window_groups; |
| num_win_group++) { |
| ptr_ms_used = |
| &ptr_aac_dec_ch_info->pstr_stereo_info->ms_used[num_win_group][0]; |
| memset(ptr_ms_used, 1, (max_sfb) * sizeof(UWORD8)); |
| } |
| } |
| } |
| |
| VOID ixheaacd_channel_pair_process( |
| ia_aac_dec_channel_info_struct *ptr_aac_dec_channel_info[], WORD32 num_ch, |
| ia_aac_dec_tables_struct *ptr_aac_tables, WORD32 total_channels, |
| WORD32 object_type, WORD32 aac_spect_data_resil_flag, |
| WORD32 aac_sf_data_resil_flag, WORD32 *in_data, WORD32 *out_data, |
| void *self_ptr) { |
| WORD32 channel; |
| ia_aac_decoder_struct *self = self_ptr; |
| if (aac_spect_data_resil_flag) { |
| for (channel = 0; channel < num_ch; channel++) { |
| ixheaacd_cblock_inv_quant_spect_data(ptr_aac_dec_channel_info[channel], |
| ptr_aac_tables); |
| ixheaacd_cblock_scale_spect_data(ptr_aac_dec_channel_info[channel], |
| ptr_aac_tables, num_ch, object_type, |
| aac_sf_data_resil_flag); |
| } |
| } |
| |
| if (num_ch > 1) { |
| if (ptr_aac_dec_channel_info[LEFT]->common_window) { |
| if (ptr_aac_dec_channel_info[LEFT]->str_pns_info.pns_active || |
| ptr_aac_dec_channel_info[RIGHT]->str_pns_info.pns_active) { |
| ixheaacd_map_ms_mask_pns(ptr_aac_dec_channel_info); |
| } |
| |
| ixheaacd_ms_stereo_process(ptr_aac_dec_channel_info, ptr_aac_tables); |
| } |
| |
| ixheaacd_intensity_stereo_process(ptr_aac_dec_channel_info, ptr_aac_tables, |
| object_type, aac_sf_data_resil_flag); |
| } |
| |
| for (channel = 0; channel < num_ch; channel++) { |
| WORD32 *p_spectrum = ptr_aac_dec_channel_info[channel]->ptr_spec_coeff; |
| |
| if (total_channels > 2) { |
| if (ptr_aac_dec_channel_info[channel]->str_ics_info.window_sequence != |
| EIGHT_SHORT_SEQUENCE) { |
| WORD16 *band_offsets = ptr_aac_tables->sfb_long_table; |
| WORD32 no_spec_coeff = band_offsets[ptr_aac_dec_channel_info[channel] |
| ->str_ics_info.max_sfb]; |
| ixheaacd_right_shift_block(p_spectrum, no_spec_coeff, 3); |
| } else { |
| ixheaacd_right_shift_block(p_spectrum, 1024, 3); |
| } |
| } |
| |
| ixheaacd_pns_process(ptr_aac_dec_channel_info, channel, ptr_aac_tables); |
| |
| if ((object_type == AOT_ER_AAC_LD) || (object_type == AOT_AAC_LTP)) { |
| { |
| if (channel == 0) { |
| ltp_info *ltp1 = |
| &(ptr_aac_dec_channel_info[channel]->str_ics_info.ltp); |
| ixheaacd_lt_prediction(ptr_aac_dec_channel_info[channel], ltp1, |
| p_spectrum, ptr_aac_tables, |
| self->ptr_aac_dec_static_channel_info[LEFT] |
| ->overlap_add_data.win_shape, |
| self->sampling_rate_index, object_type, |
| self->samples_per_frame, in_data, out_data); |
| |
| } else { |
| ltp_info *ltp2 = |
| (self->pstr_aac_dec_ch_info[0]->common_window) |
| ? &(ptr_aac_dec_channel_info[0]->str_ics_info.ltp2) |
| : |
| |
| &(ptr_aac_dec_channel_info[1]->str_ics_info.ltp); |
| ixheaacd_lt_prediction(ptr_aac_dec_channel_info[channel], ltp2, |
| p_spectrum, ptr_aac_tables, |
| self->ptr_aac_dec_static_channel_info[RIGHT] |
| ->overlap_add_data.win_shape, |
| self->sampling_rate_index, object_type, |
| self->samples_per_frame, in_data, out_data); |
| } |
| } |
| } |
| |
| if (ptr_aac_dec_channel_info[channel]->str_tns_info.tns_data_present) { |
| ixheaacd_aac_tns_process(ptr_aac_dec_channel_info[channel], |
| total_channels, ptr_aac_tables, object_type, 1, |
| NULL); |
| } |
| } |
| } |
| |
| VOID ixheaacd_set_corr_info( |
| ia_aac_dec_channel_info_struct *ptr_aac_dec_channel_info, WORD16 pns_band) { |
| ia_pns_correlation_info_struct *ptr_corr_info = |
| ptr_aac_dec_channel_info->pstr_pns_corr_info; |
| ptr_corr_info->correlated[(pns_band >> PNS_BAND_FLAGS_SHIFT)] |= |
| (1 << (pns_band & PNS_BAND_FLAGS_MASK)); |
| } |
| |
| VOID ixheaacd_map_ms_mask_pns( |
| ia_aac_dec_channel_info_struct *ptr_aac_dec_channel_info[CHANNELS]) { |
| WORD32 num_win_group, sfb; |
| |
| for (num_win_group = 0; |
| num_win_group < |
| ptr_aac_dec_channel_info[LEFT]->str_ics_info.num_window_groups; |
| num_win_group++) { |
| for (sfb = 0; sfb < ptr_aac_dec_channel_info[LEFT]->str_ics_info.max_sfb; |
| sfb++) { |
| if (ptr_aac_dec_channel_info[LEFT] |
| ->pstr_stereo_info->ms_used[num_win_group][sfb]) { |
| WORD16 pns_band = (num_win_group << 4) + sfb; |
| ixheaacd_set_corr_info(ptr_aac_dec_channel_info[LEFT], pns_band); |
| |
| if (ptr_aac_dec_channel_info[LEFT]->str_pns_info.pns_used[pns_band] && |
| ptr_aac_dec_channel_info[RIGHT]->str_pns_info.pns_used[pns_band]) { |
| ptr_aac_dec_channel_info[LEFT] |
| ->pstr_stereo_info->ms_used[num_win_group][sfb] ^= 1; |
| } |
| } |
| } |
| } |
| } |
| |
| VOID ixheaacd_pulse_data_apply(ia_pulse_info_struct *ptr_pulse_info, |
| WORD8 *pulse_scratch, |
| const WORD16 *ptr_swb_offset, WORD object_type) { |
| WORD i; |
| WORD32 k; |
| |
| memset(pulse_scratch, 0, sizeof(WORD32) * 256); |
| |
| if (object_type != AOT_ER_AAC_ELD) { |
| if (ptr_pulse_info->pulse_data_present) { |
| k = ptr_swb_offset[ptr_pulse_info->pulse_start_band]; |
| |
| for (i = 0; i <= ptr_pulse_info->number_pulse; i++) { |
| k = k + ptr_pulse_info->pulse_offset[i]; |
| pulse_scratch[k] = ptr_pulse_info->pulse_amp[i]; |
| } |
| } |
| } else { |
| ptr_pulse_info->pulse_data_present = 0; |
| } |
| } |
| |
| WORD16 ixheaacd_read_spectral_data( |
| ia_bit_buf_struct *it_bit_buff, |
| ia_aac_dec_channel_info_struct *ptr_aac_dec_channel_info, |
| ia_aac_dec_tables_struct *ptr_aac_tables, WORD32 total_channels, |
| WORD32 frame_size, WORD32 object_type, WORD32 aac_spect_data_resil_flag, |
| WORD32 aac_sf_data_resil_flag) { |
| WORD sfb, max_sfb; |
| WORD num_win_grp, group_len, grp_offset; |
| |
| WORD index; |
| WORD8 *ptr_code_book, *ptr_code_book_no; |
| WORD16 *ptr_scale_factor; |
| WORD32 *ptr_spec_coef; |
| ia_ics_info_struct *ptr_ics_info = &ptr_aac_dec_channel_info->str_ics_info; |
| WORD16 *swb_offset; |
| |
| WORD32 *ptr_spec_coef_out; |
| |
| ptr_code_book = ptr_aac_dec_channel_info->ptr_code_book; |
| ptr_scale_factor = ptr_aac_dec_channel_info->ptr_scale_factor; |
| ptr_spec_coef = ptr_aac_dec_channel_info->ptr_spec_coeff; |
| max_sfb = ptr_ics_info->max_sfb; |
| |
| swb_offset = |
| ptr_aac_tables->str_aac_sfb_info[ptr_ics_info->window_sequence].sfb_index; |
| |
| if (!aac_spect_data_resil_flag) { |
| if (ptr_aac_dec_channel_info->str_ics_info.window_sequence != |
| EIGHT_SHORT_SEQUENCE) { |
| WORD8 *ptr_scratch; |
| |
| if (object_type == AOT_ER_AAC_ELD) |
| ptr_scratch = (WORD8 *)ptr_aac_dec_channel_info->pulse_scratch; |
| else |
| ptr_scratch = (WORD8 *)ptr_aac_dec_channel_info->scratch_buf_ptr; |
| |
| memset(ptr_spec_coef, 0, sizeof(WORD32) * 1024); |
| |
| ixheaacd_pulse_data_apply(&ptr_aac_dec_channel_info->str_pulse_info, |
| ptr_scratch, swb_offset, object_type); |
| |
| ptr_spec_coef_out = &ptr_spec_coef[0]; |
| for (sfb = 0; sfb < max_sfb;) { |
| WORD ret_val; |
| WORD32 sfb_width; |
| WORD32 sect_cb = ptr_code_book[sfb]; |
| WORD start = sfb; |
| if ((object_type == AOT_ER_AAC_ELD) || (object_type == AOT_ER_AAC_LD)) { |
| if ((sect_cb >= 16) && (sect_cb <= 31)) { |
| ptr_code_book[sfb] = sect_cb = 11; |
| } |
| } |
| for (; sfb < max_sfb && (ptr_code_book[sfb] == sect_cb); sfb++) |
| ; |
| |
| sfb_width = swb_offset[sfb] - swb_offset[start]; |
| |
| if (sect_cb > ZERO_HCB && (sect_cb < NOISE_HCB)) { |
| ret_val = ixheaacd_huffman_dec_word2(it_bit_buff, sect_cb, sfb_width, |
| ptr_aac_tables, |
| ptr_spec_coef_out, ptr_scratch); |
| |
| if (ret_val != 0) { |
| return (WORD16)( |
| (WORD32)IA_ENHAACPLUS_DEC_EXE_NONFATAL_EXCEEDS_MAX_HUFFDEC_VAL); |
| } |
| } |
| |
| else { |
| if (ptr_aac_dec_channel_info->str_pulse_info.pulse_data_present) { |
| ixheaacd_inverse_quantize( |
| ptr_spec_coef_out, sfb_width, |
| (WORD32 *) |
| ptr_aac_tables->pstr_block_tables->ixheaacd_pow_table_Q13, |
| ptr_scratch); |
| } |
| |
| else { |
| memset(ptr_spec_coef_out, 0, sizeof(WORD32) * sfb_width); |
| } |
| } |
| ptr_scratch += sfb_width; |
| ptr_spec_coef_out += sfb_width; |
| } |
| |
| if ((object_type != AOT_ER_AAC_ELD) && (object_type != AOT_ER_AAC_LD)) |
| index = 1024 - swb_offset[max_sfb]; |
| else |
| index = frame_size - swb_offset[max_sfb]; |
| |
| memset(ptr_spec_coef_out, 0, sizeof(WORD32) * index); |
| |
| } else { |
| memset(ptr_spec_coef, 0, sizeof(WORD32) * 1024); |
| |
| grp_offset = 0; |
| |
| for (num_win_grp = 0; num_win_grp < ptr_ics_info->num_window_groups; |
| num_win_grp++) { |
| WORD grp_len = ptr_ics_info->window_group_length[num_win_grp]; |
| ptr_code_book_no = |
| &ptr_code_book[num_win_grp * MAX_SCALE_FACTOR_BANDS_SHORT]; |
| ptr_spec_coef_out = &ptr_spec_coef[grp_offset * MAX_BINS_SHORT]; |
| |
| for (sfb = 0; sfb < max_sfb;) { |
| WORD sect_cb = *ptr_code_book_no; |
| WORD start = sfb; |
| WORD ret_val; |
| |
| for (; sfb < max_sfb && (*ptr_code_book_no == sect_cb); |
| sfb++, ptr_code_book_no++) |
| ; |
| |
| if (sect_cb > ZERO_HCB && (sect_cb < NOISE_HCB)) { |
| ret_val = ixheaacd_decode_huffman( |
| it_bit_buff, sect_cb, ptr_spec_coef_out, (WORD16 *)swb_offset, |
| start, sfb, grp_len, ptr_aac_tables); |
| |
| if (ret_val != 0) { |
| return (WORD16)( |
| (WORD32) |
| IA_ENHAACPLUS_DEC_EXE_NONFATAL_EXCEEDS_MAX_HUFFDEC_VAL); |
| } |
| } |
| } |
| grp_offset = (grp_offset + grp_len); |
| } |
| } |
| { |
| WORD32 *ptr_scale_table = ptr_aac_tables->pstr_block_tables->scale_table; |
| WORD8 *ptr_sfb_width = |
| ptr_aac_tables->str_aac_sfb_info[ptr_ics_info->window_sequence] |
| .sfb_width; |
| |
| for (num_win_grp = 0; num_win_grp < ptr_ics_info->num_window_groups; |
| num_win_grp++) { |
| for (group_len = 0; |
| group_len < ptr_ics_info->window_group_length[num_win_grp]; |
| group_len++) { |
| (*ixheaacd_scale_factor_process)( |
| &ptr_spec_coef[0], &ptr_scale_factor[0], max_sfb, |
| (WORD8 *)ptr_sfb_width, ptr_scale_table, total_channels, |
| object_type, aac_sf_data_resil_flag); |
| |
| ptr_spec_coef += MAX_BINS_SHORT; |
| } |
| |
| ptr_scale_factor += MAX_SCALE_FACTOR_BANDS_SHORT; |
| } |
| } |
| } else { |
| ia_hcr_info_struct *pstr_hcr_info = &ptr_aac_dec_channel_info->str_hcr_info; |
| WORD32 error = 0; |
| |
| memset(ptr_spec_coef, 0, sizeof(WORD32) * 1024); |
| |
| if (ptr_aac_dec_channel_info->reorder_spect_data_len != 0) { |
| error = ixheaacd_huff_code_reorder_init( |
| pstr_hcr_info, ptr_aac_dec_channel_info, ptr_aac_tables, it_bit_buff); |
| |
| if (error != 0) { |
| return IA_ENHAACPLUS_DEC_EXE_NONFATAL_DECODE_FRAME_ERROR; |
| } |
| error = ixheaacd_hcr_decoder(pstr_hcr_info, ptr_aac_dec_channel_info, |
| ptr_aac_tables, it_bit_buff); |
| |
| if (error != 0) { |
| ixheaacd_huff_mute_erroneous_lines(pstr_hcr_info); |
| } |
| |
| it_bit_buff->cnt_bits += |
| -ptr_aac_dec_channel_info->reorder_spect_data_len; |
| it_bit_buff->ptr_read_next = |
| it_bit_buff->ptr_bit_buf_base + |
| ((it_bit_buff->size - it_bit_buff->cnt_bits) >> 3); |
| it_bit_buff->bit_pos = (it_bit_buff->size - it_bit_buff->cnt_bits) & 7; |
| |
| } else { |
| it_bit_buff->ptr_read_next = |
| it_bit_buff->ptr_bit_buf_base + |
| ((it_bit_buff->size - it_bit_buff->cnt_bits) >> 3); |
| it_bit_buff->bit_pos = (it_bit_buff->size - it_bit_buff->cnt_bits) & 7; |
| } |
| } |
| |
| return AAC_DEC_OK; |
| } |
| |
| WORD16 ixheaacd_read_tns_data( |
| ia_bit_buf_struct *it_bit_buff, |
| ia_aac_dec_channel_info_struct *ptr_aac_dec_channel_info) { |
| WORD win_size, window_per_frame; |
| WORD n_filt_bits, start_band_bits, order_bits; |
| WORD32 bottom; |
| |
| ia_ics_info_struct *ptr_ics_info = &ptr_aac_dec_channel_info->str_ics_info; |
| ia_tns_info_aac_struct *ptr_tns_info = |
| &ptr_aac_dec_channel_info->str_tns_info; |
| |
| if (ptr_ics_info->window_sequence != EIGHT_SHORT_SEQUENCE) { |
| n_filt_bits = 2; |
| start_band_bits = 6; |
| order_bits = 5; |
| window_per_frame = 1; |
| |
| } else { |
| n_filt_bits = 1; |
| start_band_bits = 4; |
| order_bits = 3; |
| window_per_frame = 8; |
| } |
| |
| bottom = ptr_ics_info->num_swb_window; |
| |
| for (win_size = 0; win_size < window_per_frame; win_size++) { |
| WORD n_filt; |
| WORD start_band, coef_res; |
| ptr_tns_info->n_filt[win_size] = n_filt = |
| (WORD16)ixheaacd_read_bits_buf(it_bit_buff, n_filt_bits); |
| |
| if (n_filt) { |
| WORD filt; |
| WORD top; |
| |
| coef_res = ixheaacd_read_bits_buf(it_bit_buff, 1); |
| |
| top = bottom; |
| for (filt = 0; filt < n_filt; filt++) { |
| WORD order; |
| ia_filter_info_struct *filter = |
| &ptr_tns_info->str_filter[win_size][filt]; |
| |
| start_band = ixheaacd_read_bits_buf(it_bit_buff, start_band_bits); |
| |
| if (top < start_band) { |
| top = start_band; |
| } |
| filter->start_band = top - start_band; |
| filter->stop_band = top; |
| |
| top = filter->start_band; |
| |
| if (filter->start_band < 0) { |
| filter->order = -1; |
| return (WORD16)((WORD32)IA_ENHAACPLUS_DEC_EXE_FATAL_TNS_RANGE_ERROR); |
| } |
| |
| filter->order = order = ixheaacd_read_bits_buf(it_bit_buff, order_bits); |
| |
| if ((order - MAX_ORDER_LONG) > 0) { |
| return (WORD16)( |
| (WORD32)IA_ENHAACPLUS_DEC_EXE_NONFATAL_TNS_ORDER_ERROR); |
| } |
| |
| if (order) { |
| WORD i; |
| WORD32 coef, coef_compress; |
| WORD resolution, shift; |
| |
| filter->direction = |
| (WORD8)(ixheaacd_read_bits_buf(it_bit_buff, 1) ? -1 : 1); |
| |
| coef_compress = ixheaacd_read_bits_buf(it_bit_buff, 1); |
| |
| filter->resolution = coef_res; |
| |
| resolution = coef_res + 3 - coef_compress; |
| |
| shift = 32 - resolution; |
| |
| for (i = 0; i < order; i++) { |
| coef = ixheaacd_read_bits_buf(it_bit_buff, resolution); |
| coef = coef << shift; |
| filter->coef[i] = (WORD8)(coef >> shift); |
| } |
| } |
| } |
| } |
| } |
| return AAC_DEC_OK; |
| } |
| |
| WORD32 ixheaacd_inv_quant(WORD32 *px_quant, WORD32 *ixheaacd_pow_table_Q13) |
| |
| { |
| WORD32 q1; |
| WORD32 temp; |
| WORD32 q_abs; |
| WORD16 interp; |
| WORD32 shift; |
| |
| q_abs = *px_quant; |
| |
| if (q_abs > (8191 + 32)) |
| return IA_ENHAACPLUS_DEC_EXE_NONFATAL_EXCEEDS_MAX_HUFFDEC_VAL; |
| |
| if (q_abs < 1024) { |
| shift = 3; |
| } else { |
| shift = 6; |
| } |
| |
| q1 = (q_abs) >> shift; |
| |
| interp = q_abs - (q1 << shift); |
| |
| temp = ixheaacd_pow_table_Q13[q1 + 1] - ixheaacd_pow_table_Q13[q1]; |
| |
| temp = (WORD32)(temp * (WORD32)interp); |
| |
| temp = temp + (ixheaacd_pow_table_Q13[q1] << shift); |
| |
| if (shift == 3) |
| temp = temp << 1; |
| else |
| temp = temp << 2; |
| |
| *px_quant = temp; |
| |
| return 0; |
| } |
| |
| void ixheaacd_scale_value_in_place(WORD32 *value, WORD32 scalefactor) { |
| WORD32 newscale; |
| |
| if ((newscale = (scalefactor)) >= 0) { |
| *(value) <<= newscale; |
| } else { |
| *(value) >>= -newscale; |
| } |
| } |
| |
| WORD32 ixheaacd_cblock_inv_quant_spect_data( |
| ia_aac_dec_channel_info_struct *ptr_aac_dec_channel_info, |
| ia_aac_dec_tables_struct *ptr_aac_tables) { |
| int window, group, grp_win, band; |
| int sf_bands_transmitted = ptr_aac_dec_channel_info->str_ics_info.max_sfb; |
| WORD8 *ptr_code_book = ptr_aac_dec_channel_info->ptr_code_book; |
| const WORD16 *band_offsets = (WORD16 *)ixheaacd_getscalefactorbandoffsets( |
| &(ptr_aac_dec_channel_info->str_ics_info), ptr_aac_tables); |
| WORD32 *ptr_pow_table_Q13 = |
| (WORD32 *)ptr_aac_tables->pstr_block_tables->ixheaacd_pow_table_Q13; |
| |
| for (window = 0, group = 0; |
| group < ptr_aac_dec_channel_info->str_ics_info.num_window_groups; |
| group++) { |
| for (grp_win = 0; |
| grp_win < |
| ptr_aac_dec_channel_info->str_ics_info.window_group_length[group]; |
| grp_win++, window++) { |
| for (band = 0; band < sf_bands_transmitted; band++) { |
| WORD32 *ptr_spec_coef = |
| SPEC(ptr_aac_dec_channel_info->ptr_spec_coeff, window, |
| ptr_aac_dec_channel_info->granule_len) + |
| band_offsets[band]; |
| int num_lines = band_offsets[band + 1] - band_offsets[band]; |
| int bnds = group * 16 + band; |
| int i; |
| |
| if ((ptr_code_book[bnds] == ZERO_HCB) || |
| (ptr_code_book[bnds] == INTENSITY_HCB) || |
| (ptr_code_book[bnds] == INTENSITY_HCB2)) |
| continue; |
| |
| if (ptr_code_book[bnds] == NOISE_HCB) { |
| continue; |
| } |
| |
| for (i = 0; i < num_lines; i++) { |
| WORD8 temp = 0; |
| WORD32 out1 = ptr_spec_coef[i]; |
| if (out1 <= 0) { |
| out1 = sub_d(temp, out1); |
| if (out1 > 127) { |
| ixheaacd_inv_quant(&out1, ptr_pow_table_Q13); |
| } else |
| out1 = ptr_pow_table_Q13[out1]; |
| ptr_spec_coef[i] = -out1; |
| |
| } else { |
| if (out1 > 127) { |
| ixheaacd_inv_quant(&out1, ptr_pow_table_Q13); |
| } else |
| out1 = ptr_pow_table_Q13[out1]; |
| |
| ptr_spec_coef[i] = out1; |
| } |
| } |
| } |
| } |
| } |
| |
| return AAC_DEC_OK; |
| } |
| |
| void ixheaacd_init_ltp_object(ltp_info *ltp) { |
| ltp->data_present = 0; |
| ltp->last_band = 0; |
| |
| ltp->lag_update = 0; |
| ltp->coef = 0; |
| } |
| |
| WORD32 ixheaacd_ltp_data(WORD32 object_type, ia_ics_info_struct *ics, |
| ltp_info *ltp, ia_handle_bit_buf_struct bs, |
| WORD32 frame_len) { |
| UWORD8 sfb, w; |
| |
| if (object_type == AOT_ER_AAC_LD) { |
| ltp->lag_update = ixheaacd_read_bits_buf(bs, 1); |
| |
| if (ltp->lag_update) { |
| ltp->lag = (UWORD16)ixheaacd_read_bits_buf(bs, 10); |
| } |
| } else { |
| ltp->lag = (UWORD16)ixheaacd_read_bits_buf(bs, 11); |
| } |
| |
| if (ltp->lag > (frame_len << 1)) return -1; |
| |
| ltp->coef = (UWORD8)ixheaacd_read_bits_buf(bs, 3); |
| |
| if (ics->window_sequence == EIGHT_SHORT_SEQUENCE) { |
| for (w = 0; w < 8; w++) { |
| if ((ltp->short_used[w] = ixheaacd_read_bits_buf(bs, 1)) & 1) { |
| ltp->short_lag_present[w] = ixheaacd_read_bits_buf(bs, 1); |
| if (ltp->short_lag_present[w]) { |
| ltp->short_lag[w] = (UWORD8)ixheaacd_read_bits_buf(bs, 4); |
| } |
| } |
| } |
| } else { |
| ltp->last_band = (ics->max_sfb < MAX_LTP_SFB ? ics->max_sfb : MAX_LTP_SFB); |
| |
| for (sfb = 0; sfb < ltp->last_band; sfb++) { |
| ltp->long_used[sfb] = ixheaacd_read_bits_buf(bs, 1); |
| } |
| } |
| |
| return 0; |
| } |
