xref: /aosp_15_r20/external/libxaac/decoder/ixheaacd_aacdecoder.c (revision 15dc779a375ca8b5125643b829a8aa4b70d7f451)

/******************************************************************************
 *                                                                            *
 * 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 <stdio.h>
#include <string.h>
#include "ixheaacd_sbr_common.h"
#include "ixheaac_type_def.h"

#include "ixheaac_constants.h"
#include "ixheaac_basic_ops32.h"
#include "ixheaac_basic_ops16.h"
#include "ixheaac_basic_ops40.h"
#include "ixheaac_basic_ops.h"
#include "ixheaacd_bitbuffer.h"

#include "ixheaacd_defines.h"

#include "ixheaacd_aac_rom.h"

#include "ixheaacd_error_codes.h"

#include "ixheaacd_pulsedata.h"

#include "ixheaacd_pns.h"
#include "ixheaacd_drc_data_struct.h"

#include "ixheaacd_interface.h"
#include "ixheaacd_info.h"
#include "ixheaacd_cnst.h"
#include "ixheaacd_sbrdecsettings.h"
#include "ixheaacd_sbr_scale.h"
#include "ixheaacd_common_rom.h"
#include "ixheaacd_env_extr_part.h"
#include "ixheaacd_sbr_rom.h"
#include "ixheaacd_hybrid.h"
#include "ixheaacd_ps_dec.h"
#include "ixheaacd_qmf_dec.h"
#include "ixheaacd_mps_polyphase.h"
#include "ixheaacd_config.h"
#include "ixheaacd_mps_struct_def.h"
#include "ixheaacd_mps_res_rom.h"
#include "ixheaacd_mps_aac_struct.h"
#include "ixheaacd_mps_dec.h"
#include "ixheaac_error_standards.h"
#include "ixheaacd_sbrdecoder.h"
#include "ixheaacd_acelp_info.h"
#include "ixheaacd_tns_usac.h"
#include "ixheaacd_ec_defines.h"
#include "ixheaacd_ec_rom.h"
#include "ixheaacd_ec_struct_def.h"
#include "ixheaacd_main.h"
#include "ixheaacd_channelinfo.h"
#include "ixheaacd_ec.h"
#include "ixheaacd_drc_dec.h"

#include "ixheaacd_block.h"
#include "ixheaacd_channel.h"
#include "ixheaacd_sbr_payload.h"
#include "ixheaacd_stereo.h"
#include "ixheaacd_adts.h"
#include "ixheaacd_audioobjtypes.h"
#include "ixheaacd_memory_standards.h"
#include "ixheaacd_latmdemux.h"
#include "ixheaacd_aacdec.h"

#include "ixheaacd_struct_def.h"
#include "ixheaacd_headerdecode.h"
#include "ixheaacd_multichannel.h"
#include "ixheaacd_adts_crc_check.h"
#include "ixheaacd_ld_mps_dec.h"

#include "ixheaacd_hcr.h"
#include "ixheaacd_struct.h"

#define SIZEOF_INT(x) ((sizeof(x) + sizeof(WORD32) - 1) / sizeof(WORD32))

#define EXT_FILL_DATA 1
#define EXT_FIL 0
#define EXT_DATA_LENGTH 3
#define EXT_LDSAC_DATA 9

extern const ia_usac_samp_rate_info ixheaacd_samp_rate_info[];

WORD32 ixheaacd_aacdec_decodeframe(
    ia_exhaacplus_dec_api_struct *p_obj_exhaacplus_dec,
    ia_aac_dec_scratch_struct *aac_scratch_ptrs, VOID *time_data_tmp,
    FLAG frame_status, WORD *type, WORD *ch_idx, WORD init_flag, WORD channel,
    WORD *element_index_order, WORD skip_full_decode, WORD ch_fac,
    WORD slot_element, WORD max_channels, WORD32 total_channels,
    WORD32 frame_length, WORD32 frame_size, ia_drc_dec_struct *pstr_drc_dec,
    WORD32 object_type, WORD32 ch_config,
    ia_eld_specific_config_struct eld_specific_config, WORD16 adtsheader,
    ia_drc_dec_struct *drc_dummy, WORD32 ldmps_present, UWORD8 *slot_pos, UWORD8 *mps_buffer,
    WORD32 *mps_header, WORD32 *mps_bytes, WORD32 is_init, WORD32 first_frame) {
  WORD ch, ele_type;
  ia_aac_dec_state_struct *p_state_enhaacplus_dec;
  ia_aac_decoder_struct *aac_dec_handle;
  ia_bit_buf_struct *it_bit_buff;
  ixheaacd_latm_struct *latm_element;

  WORD error_code = (WORD)frame_status;
  WORD previous_element;
  WORD prev_data_ele_present = 0;
  WORD new_element;
  WORD32 num_ch = 0;

  WORD32 crc_reg = 0;
  ia_adts_crc_info_struct *ptr_adts_crc_info;

  WORD32 cnt_bits = 0;

  WORD32 eld_sbr_flag = eld_specific_config.ld_sbr_flag_present;
  WORD32 ld_sbr_crc_flag = eld_specific_config.ld_sbr_crc_flag;
  WORD32 aac_spect_data_resil_flag =
      eld_specific_config.aac_spect_data_resil_flag;

  WORD32 ele_ch = 0;

  ia_aac_sfb_code_book_struct *ptr_aac_sfb_code_book_data[CHANNELS];
  ia_pns_stereo_data_struct *ptr_pns_stereo_data;

  WORD32 *work_buffer_core = aac_scratch_ptrs->base_scr_8k;
  WORD32 *work_buffer_1 = aac_scratch_ptrs->extra_scr_4k[0];
  WORD32 *work_buffer_2 = aac_scratch_ptrs->extra_scr_4k[2];
  p_state_enhaacplus_dec = p_obj_exhaacplus_dec->p_state_aac;

  WORD32 *time_data = (WORD32 *)time_data_tmp;

  aac_dec_handle = p_state_enhaacplus_dec->pstr_aac_dec_info[*ch_idx];
  it_bit_buff = p_state_enhaacplus_dec->ptr_bit_stream;

  ptr_adts_crc_info = it_bit_buff->pstr_adts_crc_info;

  latm_element = &p_state_enhaacplus_dec->latm_struct_element;

  ptr_pns_stereo_data =
      (ia_pns_stereo_data_struct
           *)&work_buffer_1[2 * SIZEOF_INT(ia_aac_dec_channel_info_struct) +
                            2 * SIZEOF_INT(ia_aac_sfb_code_book_struct)];

  aac_dec_handle->frame_status = 1;

  for (ch = 0; ch < channel; ch++) {
    const ia_aac_dec_imdct_tables_struct *pstr_imdct_tables;
    aac_dec_handle->pstr_aac_dec_ch_info[ch] =
        (ia_aac_dec_channel_info_struct
             *)&work_buffer_1[ch * SIZEOF_INT(ia_aac_dec_channel_info_struct)];
    ptr_aac_sfb_code_book_data[ch] =
        (ia_aac_sfb_code_book_struct
             *)&work_buffer_1[2 * SIZEOF_INT(ia_aac_dec_channel_info_struct) +
                              (ch * SIZEOF_INT(ia_aac_sfb_code_book_struct))];

    aac_dec_handle->pstr_aac_dec_ch_info[ch]->ptr_scale_factor =
        ptr_aac_sfb_code_book_data[ch]->scale_factor;
    aac_dec_handle->pstr_aac_dec_ch_info[ch]->ptr_code_book =
        ptr_aac_sfb_code_book_data[ch]->code_book;

    aac_dec_handle->pstr_aac_dec_ch_info[ch]->ptr_spec_coeff =
        &work_buffer_core[ch * MAX_BINS_LONG];

    if (object_type == AOT_ER_AAC_ELD) {
      aac_dec_handle->pstr_aac_dec_ch_info[ch]->ptr_spec_coeff =
          &work_buffer_core[2 * ch * MAX_BINS_LONG];
    }

    aac_dec_handle->pstr_aac_dec_ch_info[ch]->pstr_stereo_info =
        &ptr_pns_stereo_data->str_stereo_info;
    aac_dec_handle->pstr_aac_dec_ch_info[ch]->pstr_pns_corr_info =
        &ptr_pns_stereo_data->str_pns_corr_info;
    aac_dec_handle->pstr_aac_dec_ch_info[ch]->pstr_pns_rand_vec_data =
        aac_dec_handle->pstr_pns_rand_vec_data;

    pstr_imdct_tables = aac_dec_handle->pstr_aac_tables->pstr_imdct_tables;

    if (960 != frame_length) {
      aac_dec_handle->pstr_aac_dec_overlap_info[ch]->ptr_long_window[0] =
          pstr_imdct_tables->only_long_window_sine;
      aac_dec_handle->pstr_aac_dec_overlap_info[ch]->ptr_short_window[0] =
          pstr_imdct_tables->only_short_window_sine;
      aac_dec_handle->pstr_aac_dec_overlap_info[ch]->ptr_long_window[1] =
          pstr_imdct_tables->only_long_window_kbd;
      aac_dec_handle->pstr_aac_dec_overlap_info[ch]->ptr_short_window[1] =
          pstr_imdct_tables->only_short_window_kbd;

      aac_dec_handle->ptr_aac_dec_static_channel_info[ch]->ptr_long_window[0] =
          pstr_imdct_tables->only_long_window_sine;
      aac_dec_handle->ptr_aac_dec_static_channel_info[ch]->ptr_short_window[0] =
          pstr_imdct_tables->only_short_window_sine;
      aac_dec_handle->ptr_aac_dec_static_channel_info[ch]->ptr_long_window[1] =
          pstr_imdct_tables->only_long_window_kbd;
      aac_dec_handle->ptr_aac_dec_static_channel_info[ch]->ptr_short_window[1] =
          pstr_imdct_tables->only_short_window_kbd;
    } else {
      aac_dec_handle->pstr_aac_dec_overlap_info[ch]->ptr_long_window[0] =
          pstr_imdct_tables->only_long_window_sine_960;
      aac_dec_handle->pstr_aac_dec_overlap_info[ch]->ptr_short_window[0] =
          pstr_imdct_tables->only_short_window_sine_120;
      aac_dec_handle->pstr_aac_dec_overlap_info[ch]->ptr_long_window[1] =
          pstr_imdct_tables->only_long_window_kbd_960;
      aac_dec_handle->pstr_aac_dec_overlap_info[ch]->ptr_short_window[1] =
          pstr_imdct_tables->only_short_window_kbd_120;

      aac_dec_handle->ptr_aac_dec_static_channel_info[ch]->ptr_long_window[0] =
          pstr_imdct_tables->only_long_window_sine_960;
      aac_dec_handle->ptr_aac_dec_static_channel_info[ch]->ptr_short_window[0] =
          pstr_imdct_tables->only_short_window_sine_120;
      aac_dec_handle->ptr_aac_dec_static_channel_info[ch]->ptr_long_window[1] =
          pstr_imdct_tables->only_long_window_kbd_960;
      aac_dec_handle->ptr_aac_dec_static_channel_info[ch]->ptr_short_window[1] =
          pstr_imdct_tables->only_short_window_kbd_120;
    }

    if (p_obj_exhaacplus_dec->aac_config.ui_err_conceal && frame_status == 0)
    {
      memset(&aac_dec_handle->pstr_aac_dec_ch_info[ch]->str_ics_info, 0,
             sizeof(ia_ics_info_struct));
    }
    aac_dec_handle->pstr_aac_dec_ch_info[ch]->str_ics_info.frame_length = frame_length;
    if (object_type == AOT_ER_AAC_ELD || object_type == AOT_ER_AAC_LD ||
        object_type == AOT_AAC_LTP) {
      if (512 == aac_dec_handle->samples_per_frame) {
        if (object_type != AOT_ER_AAC_ELD) {
          aac_dec_handle->pstr_aac_dec_overlap_info[ch]->ptr_long_window[1] =
              (WORD16 *)pstr_imdct_tables->low_overlap_win;
          aac_dec_handle->pstr_aac_dec_overlap_info[ch]->ptr_long_window[0] =
              (WORD16 *)pstr_imdct_tables->window_sine_512;

          aac_dec_handle->ptr_aac_dec_static_channel_info[ch]
              ->ptr_long_window[1] =
              (WORD16 *)pstr_imdct_tables->low_overlap_win;
          aac_dec_handle->ptr_aac_dec_static_channel_info[ch]
              ->ptr_long_window[0] =
              (WORD16 *)pstr_imdct_tables->window_sine_512;
        } else {
          aac_dec_handle->pstr_aac_dec_overlap_info[ch]->ptr_long_window[1] =
              (WORD16 *)pstr_imdct_tables->window_sine_512_eld;
          aac_dec_handle->pstr_aac_dec_overlap_info[ch]->ptr_long_window[0] =
              (WORD16 *)pstr_imdct_tables->window_sine_512_eld;
        }
      } else if (480 == aac_dec_handle->samples_per_frame) {
        if (object_type != AOT_ER_AAC_ELD) {
          aac_dec_handle->pstr_aac_dec_overlap_info[ch]->ptr_long_window[1] =
              (WORD16 *)pstr_imdct_tables->low_overlap_win_480;
          aac_dec_handle->pstr_aac_dec_overlap_info[ch]->ptr_long_window[0] =
              (WORD16 *)pstr_imdct_tables->window_sine_480;

          aac_dec_handle->ptr_aac_dec_static_channel_info[ch]
              ->ptr_long_window[1] =
              (WORD16 *)pstr_imdct_tables->low_overlap_win_480;
          aac_dec_handle->ptr_aac_dec_static_channel_info[ch]
              ->ptr_long_window[0] =
              (WORD16 *)pstr_imdct_tables->window_sine_480;

        } else {
          aac_dec_handle->pstr_aac_dec_overlap_info[ch]->ptr_long_window[1] =
              (WORD16 *)pstr_imdct_tables->window_sine_480_eld;
          aac_dec_handle->pstr_aac_dec_overlap_info[ch]->ptr_long_window[0] =
              (WORD16 *)pstr_imdct_tables->window_sine_480_eld;
        }
      }
    }
    if ((object_type == AOT_ER_AAC_LD) || (object_type == AOT_AAC_LTP)) {
      if (aac_dec_handle->samples_per_frame <= 512) {
        aac_dec_handle->pstr_aac_dec_ch_info[ch]->str_ics_info.ltp2.lag =
            aac_dec_handle->ptr_aac_dec_static_channel_info[ch]->ltp_lag_1;
        aac_dec_handle->pstr_aac_dec_ch_info[ch]->str_ics_info.ltp.lag =
            aac_dec_handle->ptr_aac_dec_static_channel_info[ch]->ltp_lag_2;
      }
      aac_dec_handle->pstr_aac_dec_ch_info[ch]->ltp_buf =
          aac_dec_handle->ptr_aac_dec_static_channel_info[ch]->ltp_buf;
      aac_dec_handle->pstr_aac_dec_ch_info[ch]->ltp_lag =
          aac_dec_handle->ptr_aac_dec_static_channel_info[ch]->ltp_lag_1;
    }

    aac_dec_handle->pstr_aac_dec_ch_info[ch]->scratch_buf_ptr = work_buffer_2;
    if (object_type == AOT_ER_AAC_ELD) {
      aac_dec_handle->pstr_aac_dec_ch_info[ch]->pulse_scratch =
          aac_scratch_ptrs->extra_scr_4k[3];
    }
  }

  if (channel == 2) {
    if (aac_dec_handle->pstr_aac_dec_ch_info[1]->ptr_spec_coeff ==
        aac_scratch_ptrs->extra_scr_4k[0]) {
      aac_dec_handle->pstr_aac_dec_ch_info[1]->ptr_spec_coeff =
          aac_dec_handle->pstr_aac_dec_ch_info[0]->ptr_spec_coeff;
    }
  }

  for (ch = 0; ch < channel; ch++) {
    ia_pns_info_struct *ptr_pns_info =
        &aac_dec_handle->pstr_aac_dec_ch_info[ch]->str_pns_info;
    memset(ptr_pns_info, 0, sizeof(ia_pns_info_struct));
  }

  if (channel > 0) {
    ia_pns_correlation_info_struct *ptr_corr_info =
        aac_dec_handle->pstr_aac_dec_ch_info[0]->pstr_pns_corr_info;
    memset(ptr_corr_info->correlated, 0, sizeof(UWORD8) * PNS_BAND_FLAGS_SIZE);
  }

  for (ch = 0; ch < channel; ch++) {
    memset(&aac_dec_handle->pstr_aac_dec_ch_info[ch]->str_hcr_info, 0,
           sizeof(ia_hcr_info_struct));
    ixheaacd_huff_code_reorder_tbl_init(
        &aac_dec_handle->pstr_aac_dec_ch_info[ch]->str_hcr_info);
  }

  for (ch = 0; ch < channel; ch++) {
    aac_dec_handle->pstr_aac_dec_ch_info[ch]->str_ics_info.ltp.data_present = 0;
    aac_dec_handle->pstr_aac_dec_ch_info[ch]->str_ics_info.ltp2.data_present =
        0;
  }

  for (ch = 0; ch < channel; ch++) {
    if (object_type == AOT_ER_AAC_ELD || object_type == AOT_ER_AAC_LD)
      aac_dec_handle->pstr_aac_dec_ch_info[ch]->granule_len =
          aac_dec_handle->samples_per_frame;
    if (object_type == AOT_ER_AAC_LC)
      aac_dec_handle->pstr_aac_dec_ch_info[ch]->granule_len =
          aac_dec_handle->samples_per_frame / 8;
  }
  previous_element = ID_END;

  aac_dec_handle->pstr_sbr_bitstream->no_elements = 0;
  new_element = 0;
  ele_type = *type;

  cnt_bits = it_bit_buff->cnt_bits;

  WORD32 err = 0;
  jmp_buf local;

  if (p_obj_exhaacplus_dec->aac_config.ui_err_conceal) {
    err = setjmp(local);
  }

  if (!err && frame_status) {
    if (p_obj_exhaacplus_dec->aac_config.ui_err_conceal) {
      it_bit_buff->xaac_jmp_buf = &local;
    }

    if (((object_type != AOT_ER_AAC_ELD) && (object_type != AOT_ER_AAC_LD) &&
         (object_type != AOT_ER_AAC_LC)) ||
        (object_type < ER_OBJECT_START)) {
      while (ele_type != ID_END && aac_dec_handle->frame_status) {
        ele_type = (WORD)ixheaacd_read_bits_buf(it_bit_buff, 3);
        ixheaacd_read_bidirection(it_bit_buff, -3);

        if (it_bit_buff->cnt_bits < 3) {
          it_bit_buff->cnt_bits = -1;
          error_code = (WORD16)((WORD32)IA_XHEAAC_DEC_EXE_NONFATAL_INSUFFICIENT_INPUT_BYTES);
          break;
        }

        if ((ele_type == ID_FIL) || (ele_type == ID_DSE) || (new_element == 0)) {
          ele_type = (WORD)ixheaacd_read_bits_buf(it_bit_buff, 3);
          new_element = 1;
        } else if ((ele_type != ID_END)) {
          ele_type = -1;
          break;
        } else {
          ele_type = (WORD)ixheaacd_read_bits_buf(it_bit_buff, 3);
        }

        if (it_bit_buff->cnt_bits < 0) {
          aac_dec_handle->frame_status = 0;
        }

        switch (ele_type) {
          case ID_SCE:
          case ID_CPE:
          case ID_LFE:

            if (aac_dec_handle->frame_status) {
              ia_aac_dec_channel_info_struct *pstr_aac_dec_ch_info =
                  aac_dec_handle->pstr_aac_dec_ch_info[LEFT];
              ia_ics_info_struct *ptr_ics_info = &pstr_aac_dec_ch_info->str_ics_info;
              ele_ch = 1;
              if (ele_type == ID_CPE) {
                ele_ch = 2;
              } else {
                ele_ch = 1;
              }

              prev_data_ele_present = 1;

              if (ptr_adts_crc_info->crc_active == 1 && ptr_adts_crc_info->no_reg < 7) {
                crc_reg = ixheaacd_adts_crc_start_reg(ptr_adts_crc_info, it_bit_buff,
                                                      CRC_ADTS_RAW_DATA_BLK_LEN);
              }

              pstr_aac_dec_ch_info->element_instance_tag =
                  (WORD16)ixheaacd_read_bits_buf(it_bit_buff, 4);

              element_index_order[*ch_idx] = pstr_aac_dec_ch_info->element_instance_tag;
              pstr_aac_dec_ch_info->common_window = 0;

              ptr_ics_info->num_swb_window = 0;
              ptr_ics_info->sampling_rate_index = aac_dec_handle->sampling_rate_index;
              if ((object_type == AOT_ER_AAC_LD) || (object_type == AOT_AAC_LTP)) {
                ptr_ics_info->ltp.data_present = 0;
                ptr_ics_info->ltp2.data_present = 0;
                ptr_ics_info->predictor_data_present = 0;
              }

              if (ele_ch > 1) {
                aac_dec_handle->pstr_aac_dec_ch_info[RIGHT]->str_ics_info.num_swb_window = 0;
                aac_dec_handle->pstr_aac_dec_ch_info[RIGHT]->str_ics_info.sampling_rate_index =
                    aac_dec_handle->sampling_rate_index;

                pstr_aac_dec_ch_info->common_window =
                    (WORD16)ixheaacd_read_bits_buf(it_bit_buff, 1);

                if (pstr_aac_dec_ch_info->common_window) {
                  error_code = ixheaacd_ics_read(
                      it_bit_buff, ptr_ics_info, aac_dec_handle->num_swb_window, object_type,
                      pstr_aac_dec_ch_info->common_window, aac_dec_handle->samples_per_frame);
                  if (error_code) {
                    aac_dec_handle->pstr_aac_dec_ch_info[RIGHT]->str_ics_info =
                        aac_dec_handle->pstr_aac_dec_ch_info[LEFT]->str_ics_info;
                    if (it_bit_buff->cnt_bits < 0) {
                      error_code =
                          (WORD16)((WORD32)IA_XHEAAC_DEC_EXE_NONFATAL_INSUFFICIENT_INPUT_BYTES);
                    }

                    goto _ia_handle_error;
                  }

                  aac_dec_handle->pstr_aac_dec_ch_info[RIGHT]->str_ics_info =
                      pstr_aac_dec_ch_info->str_ics_info;

                  ixheaacd_read_ms_data(it_bit_buff, pstr_aac_dec_ch_info);
                }
              }

              error_code = ixheaacd_individual_ch_stream(
                  it_bit_buff, aac_dec_handle, ele_ch, frame_length, total_channels, object_type,
                  eld_specific_config, ele_type);

              if (error_code) {
                if (p_obj_exhaacplus_dec->aac_config.ui_err_conceal && !is_init) {
                  aac_dec_handle->frame_status = 0;
                } else {
                  return error_code;
                }
              }

              if (ptr_adts_crc_info->crc_active == 1) {
                ixheaacd_adts_crc_end_reg(ptr_adts_crc_info, it_bit_buff, crc_reg);
              }

              if (it_bit_buff->cnt_bits < 0) {
                error_code =
                    (WORD16)((WORD32)IA_XHEAAC_DEC_EXE_NONFATAL_INSUFFICIENT_INPUT_BYTES);
              }

              if (error_code) {
                goto _ia_handle_error;
              }

            _ia_handle_error:
              if (error_code) {
                aac_dec_handle->frame_status = 0;
                if ((ele_type >= ID_SCE) && (ele_type <= ID_LFE)) num_ch = num_ch + ele_ch;
                break;
              } else {
                error_code = ixheaacd_channel_pair_process(
                    aac_dec_handle->pstr_aac_dec_ch_info, ele_ch, aac_dec_handle->pstr_aac_tables,
                    total_channels, object_type, aac_spect_data_resil_flag,
                    eld_specific_config.aac_sf_data_resil_flag, aac_scratch_ptrs->in_data,
                    aac_scratch_ptrs->out_data, (VOID *)aac_dec_handle);
                if (error_code) {
                  if (p_obj_exhaacplus_dec->aac_config.ui_err_conceal && !is_init) {
                    aac_dec_handle->frame_status = 0;
                  } else {
                    return error_code;
                  }
                }
                num_ch = num_ch + ele_ch;
              }
            }

            break;
          case ID_CCE:
            if (max_channels > 2) {
              prev_data_ele_present = 1;
              error_code = ixheaacd_dec_coupling_channel_element(
                  it_bit_buff, aac_dec_handle, aac_dec_handle->sampling_rate_index,
                  aac_dec_handle->pstr_aac_tables, aac_dec_handle->pstr_common_tables,
                  &element_index_order[*ch_idx],
                  (ia_enhaacplus_dec_ind_cc *)aac_dec_handle->p_ind_channel_info, total_channels,
                  frame_length, object_type, eld_specific_config, ele_type);

              num_ch = num_ch + 1;

              if (error_code) {
                aac_dec_handle->frame_status = 0;
                if (p_obj_exhaacplus_dec->aac_config.ui_err_conceal && !is_init) {
                  aac_dec_handle->frame_status = 0;
                } else {
                  return error_code;
                }
              } else {
                error_code = ixheaacd_channel_pair_process(
                    aac_dec_handle->pstr_aac_dec_ch_info, 1, aac_dec_handle->pstr_aac_tables,
                    total_channels, object_type, aac_spect_data_resil_flag,
                    eld_specific_config.aac_sf_data_resil_flag, aac_scratch_ptrs->in_data,
                    aac_scratch_ptrs->out_data, (VOID *)aac_dec_handle);
                if (error_code) {
                  if (p_obj_exhaacplus_dec->aac_config.ui_err_conceal && !is_init) {
                    aac_dec_handle->frame_status = 0;
                  } else {
                    return error_code;
                  }
                }
              }
            } else {
              error_code = (WORD32)((WORD32)IA_XHEAAC_DEC_EXE_FATAL_UNIMPLEMENTED_CCE);
            }
            if (it_bit_buff->cnt_bits < 0) {
              error_code = (WORD16)((WORD32)IA_XHEAAC_DEC_EXE_NONFATAL_INSUFFICIENT_INPUT_BYTES);
              goto _ia_handle_error;
            }
            break;

          case ID_DSE:
          case ID_PCE:
          case ID_FIL:

          {
            WORD32 flag = 1;

            if ((ele_type != ID_FIL) && (ptr_adts_crc_info->crc_active == 1) &&
                (ptr_adts_crc_info->no_reg < 7)) {
              crc_reg = ixheaacd_adts_crc_start_reg(ptr_adts_crc_info, it_bit_buff, 0);
            }
            if (ele_type == ID_DSE) {
              ixheaacd_read_data_stream_element(it_bit_buff, &aac_dec_handle->byte_align_bits,
                                                p_obj_exhaacplus_dec->p_state_aac->pstr_drc_dec);
            }

            else if (ele_type == ID_PCE) {
              error_code = ixheaacd_decode_pce(
                  it_bit_buff, &p_obj_exhaacplus_dec->aac_config.ui_pce_found_in_hdr,
                  &p_obj_exhaacplus_dec->aac_config.str_prog_config);
              if (error_code != 0) {
                if (it_bit_buff->cnt_bits < 0) {
                  error_code =
                      (WORD16)((WORD32)IA_XHEAAC_DEC_EXE_NONFATAL_INSUFFICIENT_INPUT_BYTES);
                  goto _ia_handle_error;
                }
                aac_dec_handle->frame_status = 0;
                if (error_code > 0) {
                  if (p_obj_exhaacplus_dec->aac_config.ui_err_conceal && !is_init) {
                    aac_dec_handle->frame_status = 0;
                  } else {
                    return IA_XHEAAC_DEC_EXE_NONFATAL_DECODE_FRAME_ERROR;
                  }
                } else {
                  if (p_obj_exhaacplus_dec->aac_config.ui_err_conceal && !is_init) {
                    aac_dec_handle->frame_status = 0;
                  } else {
                    return error_code;
                  }
                }
              }
            }

            else if (ele_type == ID_FIL) {
              WORD32 bits_decoded = 0;
              if (object_type == AOT_ER_AAC_ELD) {
                bits_decoded = (it_bit_buff->size - it_bit_buff->cnt_bits);
                cnt_bits = (frame_size * 8 - bits_decoded);
                if (adtsheader == 1) {
                  if (cnt_bits > it_bit_buff->cnt_bits) {
                    if (p_obj_exhaacplus_dec->aac_config.ui_err_conceal && !is_init) {
                      aac_dec_handle->frame_status = 0;
                    } else {
                      return IA_XHEAAC_DEC_EXE_NONFATAL_INSUFFICIENT_INPUT_BYTES;
                    }
                  }
                }
              }

              if (ixheaacd_check_for_sbr_payload(
                      it_bit_buff, aac_dec_handle->pstr_sbr_bitstream, (WORD16)previous_element,
                      pstr_drc_dec, object_type, adtsheader, cnt_bits, ld_sbr_crc_flag, drc_dummy,
                      mps_buffer, mps_header, mps_bytes, is_init, &aac_dec_handle->is_first,
                      p_obj_exhaacplus_dec->aac_config.ui_err_conceal)) {
                flag = 0;
              }
            }

            if (it_bit_buff->cnt_bits < 0) {
              error_code = (WORD16)((WORD32)IA_XHEAAC_DEC_EXE_NONFATAL_INSUFFICIENT_INPUT_BYTES);
              goto _ia_handle_error;
            }

            if (flag) {
              if (prev_data_ele_present == 0) {
                new_element = 0;
              }
            }
            if ((ele_type != ID_FIL) && (ptr_adts_crc_info->crc_active == 1)) {
              ixheaacd_adts_crc_end_reg(ptr_adts_crc_info, it_bit_buff, crc_reg);
            }

            if (ele_type == ID_PCE) {
              if (ptr_adts_crc_info->str_crc_reg_data[crc_reg].bit_buf_cnt) {
                ptr_adts_crc_info->str_crc_reg_data[crc_reg].max_bits =
                    ptr_adts_crc_info->str_crc_reg_data[crc_reg].bit_buf_cnt;
              }
            }
          }

          break;

          case ID_END:
            error_code = 0;
            break;
        }

        previous_element = ele_type;

        if (init_flag) {
          if ((ele_type >= ID_SCE) && (ele_type <= ID_LFE)) {
            p_obj_exhaacplus_dec->aac_config.element_type[*ch_idx] = ele_type;
          }
        }
      }
    } else {
      {
        switch (ch_config) {
          default:
            if (aac_dec_handle->frame_status) {
              ia_aac_dec_channel_info_struct *pstr_aac_dec_ch_info =
                  aac_dec_handle->pstr_aac_dec_ch_info[LEFT];
              ia_ics_info_struct *ptr_ics_info = &pstr_aac_dec_ch_info->str_ics_info;

              if (ch_config == 2)
                ele_ch = 2, ele_type = 1;
              else
                ele_ch = 1, ele_type = 0;

              prev_data_ele_present = 1;

              if ((ptr_adts_crc_info->crc_active == 1) && (ptr_adts_crc_info->no_reg < 7)) {
                crc_reg = ixheaacd_adts_crc_start_reg(ptr_adts_crc_info, it_bit_buff,
                                                      CRC_ADTS_RAW_DATA_BLK_LEN);
              }

              if (object_type != AOT_ER_AAC_ELD)
                pstr_aac_dec_ch_info->element_instance_tag =
                    (WORD16)ixheaacd_read_bits_buf(it_bit_buff, 4);

              element_index_order[*ch_idx] = pstr_aac_dec_ch_info->element_instance_tag;
              pstr_aac_dec_ch_info->common_window = 0;

              ptr_ics_info->num_swb_window = 0;
              ptr_ics_info->sampling_rate_index = aac_dec_handle->sampling_rate_index;

              if (object_type == AOT_ER_AAC_LD) {
                ptr_ics_info->ltp.data_present = 0;
                ptr_ics_info->ltp2.data_present = 0;
                ptr_ics_info->predictor_data_present = 0;
              }
              if (ele_ch > 1) {
                aac_dec_handle->pstr_aac_dec_ch_info[RIGHT]->str_ics_info.num_swb_window = 0;
                aac_dec_handle->pstr_aac_dec_ch_info[RIGHT]->str_ics_info.sampling_rate_index =
                    aac_dec_handle->sampling_rate_index;

                if (object_type != 39)
                  pstr_aac_dec_ch_info->common_window =
                      (WORD16)ixheaacd_read_bits_buf(it_bit_buff, 1);
                else
                  pstr_aac_dec_ch_info->common_window = 1;

                if (pstr_aac_dec_ch_info->common_window) {
                  error_code = ixheaacd_ics_read(
                      it_bit_buff, ptr_ics_info, aac_dec_handle->num_swb_window, object_type,
                      pstr_aac_dec_ch_info->common_window, aac_dec_handle->samples_per_frame);
                  if (error_code) {
                    aac_dec_handle->pstr_aac_dec_ch_info[RIGHT]->str_ics_info =
                        aac_dec_handle->pstr_aac_dec_ch_info[LEFT]->str_ics_info;
                    if (it_bit_buff->cnt_bits < 0) {
                      error_code =
                          (WORD16)((WORD32)IA_XHEAAC_DEC_EXE_NONFATAL_INSUFFICIENT_INPUT_BYTES);
                    }

                    goto _ia_handle_error1;
                  }

                  aac_dec_handle->pstr_aac_dec_ch_info[RIGHT]->str_ics_info =
                      pstr_aac_dec_ch_info->str_ics_info;

                  ixheaacd_read_ms_data(it_bit_buff, pstr_aac_dec_ch_info);

                  {
                    if (object_type == AOT_ER_AAC_LD) {
                      IA_ERRORCODE temp =
                          ixheaacd_ltp_decode(it_bit_buff, ptr_ics_info, object_type,
                                              aac_dec_handle->samples_per_frame, LEFT);

                      if (temp != 0) {
                        if (p_obj_exhaacplus_dec->aac_config.ui_err_conceal && !is_init) {
                          p_obj_exhaacplus_dec->aac_config.frame_status = 0;
                        } else {
                          return temp;
                        }
                      }
                    }
                  }
                }
              }

              error_code = ixheaacd_individual_ch_stream(
                  it_bit_buff, aac_dec_handle, ele_ch, frame_length, total_channels, object_type,
                  eld_specific_config, ele_type);
              if (error_code) {
                if (p_obj_exhaacplus_dec->aac_config.ui_err_conceal && !is_init) {
                  aac_dec_handle->frame_status = 0;
                } else {
                  return error_code;
                }
              }

              if (ptr_adts_crc_info->crc_active == 1) {
                ixheaacd_adts_crc_end_reg(ptr_adts_crc_info, it_bit_buff, crc_reg);
              }

              if (it_bit_buff->cnt_bits < 0) {
                error_code =
                    (WORD16)((WORD32)IA_XHEAAC_DEC_EXE_NONFATAL_INSUFFICIENT_INPUT_BYTES);
              }

              if (error_code) {
                goto _ia_handle_error1;
              }

            _ia_handle_error1:
              if (error_code) {
                aac_dec_handle->frame_status = 0;
                if ((ele_type >= ID_SCE) && (ele_type <= ID_LFE)) num_ch = num_ch + ele_ch;
                break;
              } else {
                error_code = ixheaacd_channel_pair_process(
                    aac_dec_handle->pstr_aac_dec_ch_info, ele_ch, aac_dec_handle->pstr_aac_tables,
                    total_channels, object_type, aac_spect_data_resil_flag,
                    eld_specific_config.aac_sf_data_resil_flag, aac_scratch_ptrs->in_data,
                    aac_scratch_ptrs->out_data, (VOID *)aac_dec_handle);
                if (error_code) {
                  if (p_obj_exhaacplus_dec->aac_config.ui_err_conceal && !is_init) {
                    aac_dec_handle->frame_status = 0;
                  } else {
                    return error_code;
                  }
                }
                num_ch = num_ch + ele_ch;
              }
            }

            p_obj_exhaacplus_dec->aac_config.element_type[*ch_idx] = ele_ch - 1;
            break;
        }

        if ((object_type == AOT_ER_AAC_LC) || (!eld_sbr_flag)) {
          WORD32 cnt_bits;
          cnt_bits = it_bit_buff->cnt_bits;
          p_obj_exhaacplus_dec->p_state_aac->mps_dec_handle.ldmps_config.no_ldsbr_present = 1;

          if (cnt_bits >= 8) {
            error_code = ixheaacd_extension_payload(
                it_bit_buff, &cnt_bits, &p_obj_exhaacplus_dec->p_state_aac->mps_dec_handle);
            if (error_code) {
              if (p_obj_exhaacplus_dec->aac_config.ui_err_conceal && !is_init) {
                aac_dec_handle->frame_status = 0;
              } else {
                return error_code;
              }
            }
          }

          if (it_bit_buff->cnt_bits) {
            WORD32 alignment = it_bit_buff->bit_pos & 0x07;
            it_bit_buff->cnt_bits = (it_bit_buff->cnt_bits + alignment) & 7;
            it_bit_buff->bit_pos = 7;
            it_bit_buff->ptr_read_next++;
          }
        }

        else if ((object_type != AOT_ER_AAC_ELD) || (!eld_sbr_flag)) {
          WORD32 bits_decoded, cnt_bits;
          bits_decoded = (it_bit_buff->size - it_bit_buff->cnt_bits);

          cnt_bits = (frame_size * 8 - bits_decoded);

          if (object_type == AOT_ER_AAC_LC) cnt_bits = it_bit_buff->cnt_bits;

          p_obj_exhaacplus_dec->p_state_aac->mps_dec_handle.ldmps_config.no_ldsbr_present = 1;

          if (cnt_bits >= 8) {
            error_code = ixheaacd_extension_payload(
                it_bit_buff, &cnt_bits, &p_obj_exhaacplus_dec->p_state_aac->mps_dec_handle);
            if (error_code) {
              if (p_obj_exhaacplus_dec->aac_config.ui_err_conceal && !is_init) {
                aac_dec_handle->frame_status = 0;
              } else {
                return error_code;
              }
            }
          }

          if (((object_type == AOT_ER_AAC_ELD) || (object_type == AOT_ER_AAC_LD)) &&
              (p_obj_exhaacplus_dec->aac_config.ld_decoder != 1)) {
            if (it_bit_buff->cnt_bits) {
              WORD32 alignment = it_bit_buff->bit_pos & 0x07;
              it_bit_buff->cnt_bits = (it_bit_buff->cnt_bits + alignment) & 7;
              it_bit_buff->bit_pos = 7;
              it_bit_buff->ptr_read_next++;
            }
          } else {
            if (it_bit_buff->bit_pos != 7) {
              WORD32 alignment = it_bit_buff->bit_pos & 0x07;
              it_bit_buff->cnt_bits -= alignment + 1;
              it_bit_buff->bit_pos += 7 - alignment;
              it_bit_buff->ptr_read_next++;
            }
          }
        } else {
          WORD32 bits_decoded, cnt_bits;
          bits_decoded = (it_bit_buff->size - it_bit_buff->cnt_bits);
          cnt_bits = (frame_size * 8 - bits_decoded);
          if (adtsheader == 1) {
            if (cnt_bits > it_bit_buff->cnt_bits) {
              if (p_obj_exhaacplus_dec->aac_config.ui_err_conceal && !is_init) {
                aac_dec_handle->frame_status = 0;
              } else {
                return IA_XHEAAC_DEC_EXE_NONFATAL_INSUFFICIENT_INPUT_BYTES;
              }
            }
          }
          ixheaacd_check_for_sbr_payload(
              it_bit_buff, aac_dec_handle->pstr_sbr_bitstream, (WORD16)(ch_config - 1),
              pstr_drc_dec, object_type, adtsheader, cnt_bits, ld_sbr_crc_flag, drc_dummy,
              mps_buffer, mps_header, mps_bytes, is_init, &aac_dec_handle->is_first,
              p_obj_exhaacplus_dec->aac_config.ui_err_conceal);
        }
      }
    }
  }
  if ((err || (aac_dec_handle->frame_status == 0) || (frame_status == 0)) && (!is_init)) {
    if (p_obj_exhaacplus_dec->aac_config.ui_err_conceal) {
      aac_dec_handle->frame_status = 0;
      error_code = 0;
      num_ch = channel;
      ele_type = ID_END;
      p_obj_exhaacplus_dec->aac_config.frame_status = 0;
      it_bit_buff->cnt_bits = 0;
      aac_dec_handle->byte_align_bits = 0;
    } else {
      return err;
    }
  }
  if (p_obj_exhaacplus_dec->aac_config.ui_err_conceal && aac_dec_handle->conceal_count == 0) {
    for (ch = 0; ch < channel; ch++) {
      ixheaacd_aac_ec_init(&aac_dec_handle->ptr_aac_dec_static_channel_info[ch]->str_ec_state);
    }
  }

  if (ele_type == ID_END && p_state_enhaacplus_dec->bs_format == LOAS_BSFORMAT) {
    WORD32 tmp;
    tmp = ((WORD32)latm_element->layer_info[0][0].frame_len_bits) -
          (it_bit_buff->initial_cnt_bits - it_bit_buff->cnt_bits);

    if (tmp > 0) ixheaacd_read_bidirection(it_bit_buff, tmp);

    if (latm_element->other_data_present) {
      WORD32 count_bits = (WORD32)latm_element->other_data_length;
      ixheaacd_read_bidirection(it_bit_buff, count_bits);
    }
  }

  if (object_type == AOT_ER_AAC_LD) {
    for (ch = 0; ch < channel; ch++) {
      aac_dec_handle->ptr_aac_dec_static_channel_info[ch]->ltp_lag_1 =
          aac_dec_handle->pstr_aac_dec_ch_info[ch]->str_ics_info.ltp2.lag;
      aac_dec_handle->ptr_aac_dec_static_channel_info[ch]->ltp_lag_2 =
          aac_dec_handle->pstr_aac_dec_ch_info[ch]->str_ics_info.ltp.lag;
    }
  }
  aac_dec_handle->frame_status = aac_dec_handle->frame_status && frame_status;

  aac_dec_handle->channels = num_ch;

  if (error_code == 0)
    if ((skip_full_decode == 0) || ((skip_full_decode == 1) && error_code)) {
      ia_ics_info_struct str_ics_info[2];
      WORD32 *spec_coef[2];
      WORD32 *scratch[2];

      for (ch = 0; ch < channel; ch++) {
        str_ics_info[ch] = aac_dec_handle->pstr_aac_dec_ch_info[ch]->str_ics_info;
        spec_coef[ch] = aac_dec_handle->pstr_aac_dec_ch_info[ch]->ptr_spec_coeff;
      }

      scratch[0] = (WORD32 *)aac_scratch_ptrs->extra_scr_4k[2];
      scratch[1] = (WORD32 *)aac_scratch_ptrs->extra_scr_4k[1];

      error_code = ixheaacd_drc_map_channels(
          pstr_drc_dec, aac_dec_handle->channels,
          aac_dec_handle->pstr_aac_dec_ch_info[0]->str_ics_info.frame_length);
      if (error_code) {
        if (p_obj_exhaacplus_dec->aac_config.ui_err_conceal && !is_init) {
          error_code = 0;
          aac_dec_handle->frame_status = 0;
        } else {
          return error_code;
        }
      }

      for (ch = 0; ch < aac_dec_handle->channels; ch++) {
        WORD32 *overlap1 =
            aac_dec_handle->ptr_aac_dec_static_channel_info[ch]->overlap_add_data.ptr_overlap_buf;
        const WORD16 *ptr_long_window_next =
            aac_dec_handle->ptr_aac_dec_static_channel_info[ch]
                ->ptr_long_window[(int)str_ics_info[ch].window_shape];
        const WORD16 *ptr_short_window_next =
            aac_dec_handle->ptr_aac_dec_static_channel_info[ch]
                ->ptr_short_window[(int)str_ics_info[ch].window_shape];
        if (p_obj_exhaacplus_dec->aac_config.ui_err_conceal) {
          ia_aac_dec_channel_info_struct *pstr_aac_dec_channel_info =
              aac_dec_handle->pstr_aac_dec_ch_info[ch];
          ia_aac_dec_channel_info *pstr_aac_dec_static_channel_info =
              aac_dec_handle->ptr_aac_dec_static_channel_info[ch];

          ia_aac_dec_channel_info_struct **ppstr_aac_dec_channel_info =
              &pstr_aac_dec_channel_info;
          ia_aac_dec_channel_info **ppstr_aac_dec_static_channel_info =
              &pstr_aac_dec_static_channel_info;
          ia_audio_specific_config_struct *pstr_audio_specific_config;
          pstr_audio_specific_config = p_state_enhaacplus_dec->ia_audio_specific_config;

          if (str_ics_info[ch].max_sfb > str_ics_info[ch].num_swb_window) {
            aac_dec_handle->frame_status = 0;
          }

          ixheaacd_aac_apply_ec(
              &(*ppstr_aac_dec_static_channel_info)->str_ec_state, *ppstr_aac_dec_channel_info,
              &ixheaacd_samp_rate_info[pstr_audio_specific_config->samp_frequency_index],
              aac_dec_handle->samples_per_frame, &str_ics_info[ch], aac_dec_handle->frame_status);

          aac_dec_handle->conceal_count = aac_dec_handle->conceal_count + 1;
          if (aac_dec_handle->frame_status) {
            aac_dec_handle->sbr_num_elements = aac_dec_handle->pstr_sbr_bitstream->no_elements;
          } else {
            aac_dec_handle->pstr_sbr_bitstream->no_elements = aac_dec_handle->sbr_num_elements;
          }
          if (first_frame == 1)
            skip_full_decode = 1;
          else
            skip_full_decode = 0;
        }
        if (pstr_drc_dec->drc_on) {
          ixheaacd_drc_apply(pstr_drc_dec, spec_coef[ch],
                             str_ics_info[ch].window_sequence, ch,
                             str_ics_info[ch].frame_length,
                             p_obj_exhaacplus_dec->aac_config.ui_enh_sbr, object_type);
        }
        if (skip_full_decode == 0) {
          ixheaacd_imdct_process(aac_dec_handle->pstr_aac_dec_overlap_info[ch],
                                 spec_coef[ch], &str_ics_info[ch],
                                 time_data + slot_element, ch_fac, scratch[ch],
                                 aac_dec_handle->pstr_aac_tables, object_type,
                                 ldmps_present, slot_element);

          if (slot_pos != NULL) *slot_pos = slot_element;
          if (p_obj_exhaacplus_dec->p_state_aac->qshift_cnt > 15) {
            return IA_FATAL_ERROR;
          }

          p_obj_exhaacplus_dec->p_state_aac
              ->qshift_adj[p_obj_exhaacplus_dec->p_state_aac->qshift_cnt++] =
              str_ics_info[ch].qshift_adj;

          aac_dec_handle->ptr_aac_dec_static_channel_info[ch]
              ->overlap_add_data.win_shape = str_ics_info[ch].window_shape;
          aac_dec_handle->ptr_aac_dec_static_channel_info[ch]
              ->overlap_add_data.win_seq = str_ics_info[ch].window_sequence;
          if ((object_type == AOT_ER_AAC_LD) || (object_type == AOT_AAC_LTP)) {
            {
              if ((str_ics_info[ch].window_sequence == ONLY_LONG_SEQUENCE) ||
                  (str_ics_info[ch].window_sequence == LONG_STOP_SEQUENCE)) {
                ixheaacd_lt_update_state(
                    aac_dec_handle->ptr_aac_dec_static_channel_info[ch]
                        ->ltp_buf,
                    time_data + slot_element, overlap1,
                    aac_dec_handle->samples_per_frame, object_type,
                    (WORD16)ch_fac, str_ics_info[ch].window_sequence,
                    (WORD16 *)ptr_long_window_next, slot_element);
              } else {
                ixheaacd_lt_update_state(
                    aac_dec_handle->ptr_aac_dec_static_channel_info[ch]
                        ->ltp_buf,
                    time_data + slot_element, overlap1,
                    aac_dec_handle->samples_per_frame, object_type,
                    (WORD16)ch_fac, str_ics_info[ch].window_sequence,
                    (WORD16 *)ptr_short_window_next, slot_element);
              }
            }
          }
          if (p_obj_exhaacplus_dec->aac_config.ui_err_conceal) {
            ia_aac_dec_channel_info *pstr_aac_dec_static_channel_info =
                aac_dec_handle->ptr_aac_dec_static_channel_info[ch];
            ia_ec_state_str *pstr_ec_state = &pstr_aac_dec_static_channel_info->str_ec_state;
            WORD32 k;

            if (pstr_ec_state->fade_idx < MAX_FADE_FRAMES) {
              WORD32 fade_fac = ia_ec_fade_factors_fix[pstr_ec_state->fade_idx];
              for (k = 0; k < str_ics_info[ch].frame_length; k++) {
                time_data[k] = ixheaac_mul32_sh(time_data[k], fade_fac, 30);
              }
            } else {
              memset(time_data, 0, str_ics_info[ch].frame_length * sizeof(time_data[0]));
            }
          }
          slot_element++;
        }
      }
    }

  if (ele_type == ID_END) {
    if (p_obj_exhaacplus_dec->aac_config.ui_err_conceal) {
      if (err && !is_init) {
        aac_dec_handle->frame_status = 0;
      } else {
        ixheaacd_byte_align(it_bit_buff, &aac_dec_handle->byte_align_bits);
        if (p_state_enhaacplus_dec->bs_format == LOAS_BSFORMAT) {
          ixheaacd_byte_align(it_bit_buff, &it_bit_buff->audio_mux_align);
        }
      }
    } else {
      ixheaacd_byte_align(it_bit_buff, &aac_dec_handle->byte_align_bits);
      if (p_state_enhaacplus_dec->bs_format == LOAS_BSFORMAT) {
        ixheaacd_byte_align(it_bit_buff, &it_bit_buff->audio_mux_align);
      }
    }
  }
  *type = ele_type;

  aac_dec_handle->block_number =
      ixheaac_add32(aac_dec_handle->block_number, 1);
  if (p_obj_exhaacplus_dec->aac_config.ui_err_conceal && !is_init) {
    p_obj_exhaacplus_dec->aac_config.frame_status = aac_dec_handle->frame_status;
    return IA_NO_ERROR;
  } else {
    return error_code;
  }
}

WORD32 ixheaacd_extension_payload(ia_bit_buf_struct *it_bit_buff, WORD32 *cnt,
                                  ia_mps_dec_state_struct *self) {
  WORD16 extension_type;
  WORD32 len, add_len;
  WORD32 i;
  WORD32 fill_nibble;

  WORD32 err = 0;
  extension_type = (WORD16)ixheaacd_read_bits_buf(it_bit_buff, 4);
  switch (extension_type) {
    case EXT_FILL_DATA:

      fill_nibble = ixheaacd_read_bits_buf(it_bit_buff, 4);

      if (fill_nibble == 0) {
        for (i = 0; i < (*cnt >> 3) - 1; i++) {
          if (it_bit_buff->cnt_bits >= 8)
            ixheaacd_read_bits_buf(it_bit_buff, 8);
          else
            ixheaacd_read_bits_buf(it_bit_buff, it_bit_buff->cnt_bits);
        }

      } else
          err = -1;
      *cnt = it_bit_buff->cnt_bits;
      break;

    case EXT_DATA_LENGTH:

      len = ixheaacd_read_bits_buf(it_bit_buff, 4);

      if (len == 15) {
        add_len = ixheaacd_read_bits_buf(it_bit_buff, 8);
        len += add_len;

        if (add_len == 255) {
          len += ixheaacd_read_bits_buf(it_bit_buff, 16);
        }
      }
      len <<= 3;

      ixheaacd_extension_payload(it_bit_buff, cnt, self);
      break;

    case EXT_LDSAC_DATA:

      self->parse_nxt_frame = 1;
      ixheaacd_read_bits_buf(it_bit_buff, 2);/*anc_type*/
      ixheaacd_read_bits_buf(it_bit_buff, 2);/*anc_start_stop*/

      if (self->ldmps_config.ldmps_present_flag == 1) {
        err = ixheaacd_ld_mps_frame_parsing(self, it_bit_buff);
        if (err) return err;
      }

      *cnt = it_bit_buff->cnt_bits;
      break;
    case EXT_FIL:
    default:

      for (i = 0; i < (*cnt) - 4; i++) {
         ixheaacd_skip_bits_buf(it_bit_buff, 1);/*discard*/
      }

      *cnt = it_bit_buff->cnt_bits;
      break;
  }

  return err;
}