/src/libxaac/decoder/ixheaacd_acelp_bitparse.c

Source
/******************************************************************************
 *                                                                            *
 * 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 "ixheaac_type_def.h"

#include "ixheaacd_acelp_com.h"
#include "ixheaacd_bitbuffer.h"

#include "ixheaacd_interface.h"
#include "ixheaacd_cnst.h"
#include "ixheaacd_info.h"
#include "ixheaacd_sbr_common.h"
#include "ixheaacd_drc_data_struct.h"
#include "ixheaacd_defines.h"
#include "ixheaacd_aac_rom.h"
#include "ixheaacd_pulsedata.h"
#include "ixheaacd_pns.h"
#include "ixheaac_constants.h"
#include "ixheaacd_sbrdecsettings.h"
#include "ixheaacd_sbrdecoder.h"
#include "ixheaacd_acelp_info.h"
#include "ixheaacd_tns_usac.h"
#include "ixheaacd_ec_defines.h"
#include "ixheaacd_ec_struct_def.h"
#include "ixheaacd_main.h"
#include "ixheaacd_channelinfo.h"
#include "ixheaacd_ec.h"
#include "ixheaacd_arith_dec.h"
#include "ixheaacd_func_def.h"
#include "ixheaac_basic_ops32.h"
#include "ixheaac_error_standards.h"
#include "ixheaacd_error_codes.h"

extern const ia_usac_samp_rate_info ixheaacd_samp_rate_info[];

WORD32 ixheaacd_get_mode_lpc(WORD32 lpc_set, ia_bit_buf_struct *it_bit_buff, WORD32 *nk_mode) {
  WORD32 mode_lpc = 0;
  switch (lpc_set) {
    case 4:
      mode_lpc = 0;
      break;
    case 0:
    case 2:
      mode_lpc = ixheaacd_read_bits_buf(it_bit_buff, 1);
      if (mode_lpc == 1) *nk_mode = 3;
      break;
    case 1:
      if (ixheaacd_read_bits_buf(it_bit_buff, 1) == 0)
        mode_lpc = *nk_mode = 2;
      else {
        if (ixheaacd_read_bits_buf(it_bit_buff, 1) == 0)
          mode_lpc = *nk_mode = 0;
        else
          mode_lpc = *nk_mode = 1;
      }
      break;
    case 3:
      if (ixheaacd_read_bits_buf(it_bit_buff, 1) == 0)
        mode_lpc = *nk_mode = 1;
      else {
        if (ixheaacd_read_bits_buf(it_bit_buff, 1) == 0)
          mode_lpc = *nk_mode = 0;
        else {
          if (ixheaacd_read_bits_buf(it_bit_buff, 1) == 0)
            mode_lpc = 2;
          else
            mode_lpc = 3;
          *nk_mode = 2;
        }
      }
      break;
  }
  return mode_lpc;
}

VOID ixheaacd_qn_data(WORD32 nk_mode, WORD32 *qn, ia_bit_buf_struct *it_bit_buff) {
  WORD32 k;
  switch (nk_mode) {
    case 1:
      for (k = 0; k < 2; k++) {
        while (ixheaacd_read_bits_buf(it_bit_buff, 1) == 1) {
          qn[k] += 1;
        }
        if (qn[k] > 0) qn[k] += 1;
      }
      break;
    case 0:
    case 2:
    case 3:
      for (k = 0; k < 2; k++) qn[k] = 2 + ixheaacd_read_bits_buf(it_bit_buff, 2);

      if (nk_mode == 2) {
        for (k = 0; k < 2; k++) {
          if (qn[k] > 4) {
            qn[k] = 0;

            while (ixheaacd_read_bits_buf(it_bit_buff, 1) == 1) qn[k] += 1;

            if (qn[k] > 0) qn[k] += 4;
          }
        }
      } else {
        for (k = 0; k < 2; k++) {
          if (qn[k] > 4) {
            WORD32 qn_ext = 0;
            while (ixheaacd_read_bits_buf(it_bit_buff, 1) == 1) qn_ext += 1;

            switch (qn_ext) {
              case 0:
                qn[k] = 5;
                break;
              case 1:
                qn[k] = 6;
                break;
              case 2:
                qn[k] = 0;
                break;
              default:
                qn[k] = qn_ext + 4;
                break;
            }
          }
        }
      }
      break;
  }
  return;
}

VOID ixheaacd_code_book_indices(ia_td_frame_data_struct *pstr_td_frame_data, WORD32 nk_mode,
                                WORD32 *pos, ia_bit_buf_struct *it_bit_buff) {
  WORD32 k, qn[2] = {0, 0}, nk, n, i;

  ixheaacd_qn_data(nk_mode, &qn[0], it_bit_buff);

  pstr_td_frame_data->lpc_first_approx_idx[(*pos)++] = qn[0];
  pstr_td_frame_data->lpc_first_approx_idx[(*pos)++] = qn[1];

  for (k = 0; k < 2; k++) {
    if (qn[k] > 0) {
      if (qn[k] > 4) {
        nk = (qn[k] - 3) / 2;
        n = qn[k] - nk * 2;
      } else {
        nk = 0;
        n = qn[k];
      }
      pstr_td_frame_data->lpc_first_approx_idx[(*pos)++] =
          ixheaacd_read_bits_buf(it_bit_buff, 4 * n);

      for (i = 0; i < 8; i++)
        pstr_td_frame_data->lpc_first_approx_idx[(*pos)++] =
            ixheaacd_read_bits_buf(it_bit_buff, nk);
    }
  }
  return;
}

VOID ixheaacd_lpc_data(WORD32 first_lpd_flag, WORD32 mod[],
                       ia_td_frame_data_struct *pstr_td_frame_data,
                       ia_bit_buf_struct *it_bit_buff) {
  WORD32 mode_lpc, nk_mode = 0, j = 0;

  mode_lpc = ixheaacd_get_mode_lpc(4, it_bit_buff, &nk_mode);

  pstr_td_frame_data->lpc_first_approx_idx[j++] = ixheaacd_read_bits_buf(it_bit_buff, 8);

  ixheaacd_code_book_indices(pstr_td_frame_data, nk_mode, &j, it_bit_buff);
  if (first_lpd_flag) {
    mode_lpc = ixheaacd_get_mode_lpc(0, it_bit_buff, &nk_mode);
    pstr_td_frame_data->lpc_first_approx_idx[j++] = mode_lpc;

    if (mode_lpc == 0)
      pstr_td_frame_data->lpc_first_approx_idx[j++] = ixheaacd_read_bits_buf(it_bit_buff, 8);

    ixheaacd_code_book_indices(pstr_td_frame_data, nk_mode, &j, it_bit_buff);
  }
  if (mod[0] < 3) {
    mode_lpc = ixheaacd_get_mode_lpc(2, it_bit_buff, &nk_mode);
    pstr_td_frame_data->lpc_first_approx_idx[j++] = mode_lpc;

    if (mode_lpc == 0)
      pstr_td_frame_data->lpc_first_approx_idx[j++] = ixheaacd_read_bits_buf(it_bit_buff, 8);

    ixheaacd_code_book_indices(pstr_td_frame_data, nk_mode, &j, it_bit_buff);
  }
  if (mod[0] < 2) {
    mode_lpc = ixheaacd_get_mode_lpc(1, it_bit_buff, &nk_mode);
    pstr_td_frame_data->lpc_first_approx_idx[j++] = mode_lpc;

    if (mode_lpc == 0)
      pstr_td_frame_data->lpc_first_approx_idx[j++] = ixheaacd_read_bits_buf(it_bit_buff, 8);

    if (mode_lpc != 1) ixheaacd_code_book_indices(pstr_td_frame_data, nk_mode, &j, it_bit_buff);
  }
  if (mod[2] < 2) {
    mode_lpc = ixheaacd_get_mode_lpc(3, it_bit_buff, &nk_mode);
    pstr_td_frame_data->lpc_first_approx_idx[j++] = mode_lpc;

    if (mode_lpc == 0)
      pstr_td_frame_data->lpc_first_approx_idx[j++] = ixheaacd_read_bits_buf(it_bit_buff, 8);

    ixheaacd_code_book_indices(pstr_td_frame_data, nk_mode, &j, it_bit_buff);
  }
  return;
}

VOID ixheaacd_fac_decoding(WORD32 fac_length, WORD32 k, WORD32 *fac_prm,
                           ia_bit_buf_struct *it_bit_buff) {
  WORD32 i, j, n, qn, nk, kv[8];
  long code_book_index;

  for (i = 0; i < fac_length; i += 8) {
    qn = 0;
    while (ixheaacd_read_bits_buf(it_bit_buff, 1) == 1) {
      qn += 1;
    }
    if (qn != 0) qn += 1;

    nk = 0;
    n = qn;
    if (qn > 4) {
      nk = (qn - 3) >> 1;
      n = qn - nk * 2;
    }

    code_book_index = ixheaacd_read_bits_buf(it_bit_buff, 4 * n);

    for (j = 0; j < 8; j++) {
      kv[j] = ixheaacd_read_bits_buf(it_bit_buff, nk);
    }

    ixheaacd_rotated_gosset_mtx_dec(qn, code_book_index, kv, &fac_prm[k * FAC_LENGTH + i]);
  }
}

const UWORD8 ixheaacd_num_bites_celp_coding[8][4] = {
    {5, 5, 5, 5},     {9, 9, 5, 5},     {9, 9, 9, 9}, {13, 13, 9, 9},
    {13, 13, 13, 13}, {16, 16, 16, 16}, {1, 5, 1, 5}, {1, 5, 5, 5}};

VOID ixheaacd_acelp_decoding(WORD32 k, ia_usac_data_struct *usac_data,
                             ia_td_frame_data_struct *pstr_td_frame_data,
                             ia_bit_buf_struct *it_bit_buff, WORD32 chan) {
  WORD32 sfr, kk;
  WORD32 nb_subfr = usac_data->num_subfrm;
  const UWORD8 *ptr_num_bits =
      &ixheaacd_num_bites_celp_coding[pstr_td_frame_data->acelp_core_mode][0];

  chan = 0;
  pstr_td_frame_data->mean_energy[k] = ixheaacd_read_bits_buf(it_bit_buff, 2);

  for (sfr = 0; sfr < nb_subfr; sfr++) {
    kk = k * 4 + sfr;

    if ((sfr == 0) || ((nb_subfr == 4) && (sfr == 2)))
      pstr_td_frame_data->acb_index[kk] = ixheaacd_read_bits_buf(it_bit_buff, 9);

    else
      pstr_td_frame_data->acb_index[kk] = ixheaacd_read_bits_buf(it_bit_buff, 6);

    pstr_td_frame_data->ltp_filtering_flag[kk] = ixheaacd_read_bits_buf(it_bit_buff, 1);

    if (pstr_td_frame_data->acelp_core_mode == 5) {
      pstr_td_frame_data->icb_index[kk][0] =
          ixheaacd_read_bits_buf(it_bit_buff, 2);
      pstr_td_frame_data->icb_index[kk][1] =
          ixheaacd_read_bits_buf(it_bit_buff, 2);
      pstr_td_frame_data->icb_index[kk][2] =
          ixheaacd_read_bits_buf(it_bit_buff, 2);
      pstr_td_frame_data->icb_index[kk][3] =
          ixheaacd_read_bits_buf(it_bit_buff, 2);
      pstr_td_frame_data->icb_index[kk][4] =
          ixheaacd_read_bits_buf(it_bit_buff, 14);
      pstr_td_frame_data->icb_index[kk][5] =
          ixheaacd_read_bits_buf(it_bit_buff, 14);
      pstr_td_frame_data->icb_index[kk][6] =
          ixheaacd_read_bits_buf(it_bit_buff, 14);
      pstr_td_frame_data->icb_index[kk][7] =
          ixheaacd_read_bits_buf(it_bit_buff, 14);
    } else {
      pstr_td_frame_data->icb_index[kk][0] =
          ixheaacd_read_bits_buf(it_bit_buff, ptr_num_bits[0]);
      pstr_td_frame_data->icb_index[kk][1] =
          ixheaacd_read_bits_buf(it_bit_buff, ptr_num_bits[1]);
      pstr_td_frame_data->icb_index[kk][2] =
          ixheaacd_read_bits_buf(it_bit_buff, ptr_num_bits[2]);
      pstr_td_frame_data->icb_index[kk][3] =
          ixheaacd_read_bits_buf(it_bit_buff, ptr_num_bits[3]);
    }

    pstr_td_frame_data->gains[kk] = ixheaacd_read_bits_buf(it_bit_buff, 7);
  }
}

VOID ixheaacd_tcx_coding(ia_usac_data_struct *usac_data, pWORD32 quant, WORD32 k,
                         WORD32 first_tcx_flag, ia_td_frame_data_struct *pstr_td_frame_data,
                         ia_bit_buf_struct *it_bit_buff) {
  pstr_td_frame_data->noise_factor[k] = ixheaacd_read_bits_buf(it_bit_buff, 3);

  pstr_td_frame_data->global_gain[k] = ixheaacd_read_bits_buf(it_bit_buff, 7);

  switch (pstr_td_frame_data->mod[k]) {
    case 1:
      pstr_td_frame_data->tcx_lg[k] = usac_data->len_subfrm;
      break;
    case 2:
      pstr_td_frame_data->tcx_lg[k] = 2 * (usac_data->len_subfrm);
      break;
    case 3:
      pstr_td_frame_data->tcx_lg[k] = 4 * (usac_data->len_subfrm);
      break;
  }

  if (first_tcx_flag) {
    if (usac_data->usac_independency_flg) {
      pstr_td_frame_data->arith_reset_flag = 1;
    } else {
      pstr_td_frame_data->arith_reset_flag = ixheaacd_read_bits_buf(it_bit_buff, 1);
    }
  }

  ixheaacd_arith_data(pstr_td_frame_data, quant, usac_data, it_bit_buff, (first_tcx_flag), k);

  return;
}

WORD32 ixheaacd_lpd_channel_stream(ia_usac_data_struct *usac_data,
                                   ia_td_frame_data_struct *pstr_td_frame_data,
                                   ia_bit_buf_struct *it_bit_buff, FLOAT32 *synth) {
  WORD32 lpd_mode, k, cnt, ii;
  WORD32 first_tcx_flag;
  WORD32 *quant;
  WORD32 core_mode_last = 0, fac_data_present;
  WORD32 *fac_data;
  WORD32 first_lpd_flag = 0;
  WORD32 short_fac_flag;
  WORD32 bpf_control_info = 0;
  WORD32 chan = usac_data->present_chan;
  WORD32 last_lpd_mode = usac_data->str_tddec[chan]->mode_prev;
  WORD32 err = 0;
  short_fac_flag = 0;

  jmp_buf local;

  if (usac_data->ec_flag) {
    err = setjmp(local);
  }

  if (usac_data->sampling_rate_idx <= 5 && usac_data->ec_flag) {
    usac_data->frame_ok = 0;
  }

  if (err == 0 && usac_data->frame_ok == 1) {
    if (usac_data->ec_flag) {
      it_bit_buff->xaac_jmp_buf = &local;
    }
    pstr_td_frame_data->acelp_core_mode = ixheaacd_read_bits_buf(it_bit_buff, 3);

    lpd_mode = ixheaacd_read_bits_buf(it_bit_buff, 5);

    if ((lpd_mode > 25 || lpd_mode < 0)) {
      if (usac_data->ec_flag) {
        longjmp(*(it_bit_buff->xaac_jmp_buf),
                IA_XHEAAC_DEC_EXE_NONFATAL_INSUFFICIENT_INPUT_BYTES);
      } else {
        return IA_FATAL_ERROR;
      }
    }

    if (lpd_mode == 25) {
      pstr_td_frame_data->mod[0] = pstr_td_frame_data->mod[1] = pstr_td_frame_data->mod[2] =
          pstr_td_frame_data->mod[3] = 3;
    } else if (lpd_mode == 24) {
      pstr_td_frame_data->mod[0] = pstr_td_frame_data->mod[1] = pstr_td_frame_data->mod[2] =
          pstr_td_frame_data->mod[3] = 2;
    } else {
      if (lpd_mode >= 20) {
        pstr_td_frame_data->mod[0] = lpd_mode & 1;
        pstr_td_frame_data->mod[1] = (lpd_mode >> 1) & 1;
        pstr_td_frame_data->mod[2] = pstr_td_frame_data->mod[3] = 2;
      } else if (lpd_mode >= 16) {
        pstr_td_frame_data->mod[0] = pstr_td_frame_data->mod[1] = 2;
        pstr_td_frame_data->mod[2] = lpd_mode & 1;
        pstr_td_frame_data->mod[3] = (lpd_mode >> 1) & 1;
      } else {
        pstr_td_frame_data->mod[0] = lpd_mode & 1;
        pstr_td_frame_data->mod[1] = (lpd_mode >> 1) & 1;
        pstr_td_frame_data->mod[2] = (lpd_mode >> 2) & 1;
        pstr_td_frame_data->mod[3] = (lpd_mode >> 3) & 1;
      }
    }

    bpf_control_info = ixheaacd_read_bits_buf(it_bit_buff, 1);

    core_mode_last = ixheaacd_read_bits_buf(it_bit_buff, 1);

    fac_data_present = ixheaacd_read_bits_buf(it_bit_buff, 1);

    first_lpd_flag = (core_mode_last == 0) ? 1 : 0;

    quant = pstr_td_frame_data->x_tcx_invquant;
    first_tcx_flag = 1;
    k = 0;
    while (k < 4) {
      if (k == 0) {
        if ((core_mode_last == 1) && (fac_data_present == 1))
          ixheaacd_fac_decoding((usac_data->len_subfrm) / 2, k, pstr_td_frame_data->fac,
                                it_bit_buff);
      } else {
        if (((last_lpd_mode == 0) && (pstr_td_frame_data->mod[k] > 0)) ||
            ((last_lpd_mode > 0) && (pstr_td_frame_data->mod[k] == 0)))
          ixheaacd_fac_decoding((usac_data->len_subfrm) / 2, k, pstr_td_frame_data->fac,
                                it_bit_buff);
      }

      if (pstr_td_frame_data->mod[k] == 0) {
        ixheaacd_acelp_decoding(k, usac_data, pstr_td_frame_data, it_bit_buff, chan);
        last_lpd_mode = 0;
        pstr_td_frame_data->tcx_lg[k] = 0;
        k += 1;
      } else {
        ixheaacd_tcx_coding(usac_data, quant, k, first_tcx_flag, pstr_td_frame_data, it_bit_buff);
        last_lpd_mode = pstr_td_frame_data->mod[k];
        quant += pstr_td_frame_data->tcx_lg[k];

        cnt = 1 << (pstr_td_frame_data->mod[k] - 1);

        for (ii = 0; ii < cnt - 1; ii++) pstr_td_frame_data->tcx_lg[k + 1 + ii] = 0;

        k += cnt;
        first_tcx_flag = 0;
      }
    }

    ixheaacd_lpc_data(first_lpd_flag, pstr_td_frame_data->mod, pstr_td_frame_data, it_bit_buff);

    if ((core_mode_last == 0) && (fac_data_present == 1)) {
      WORD32 fac_length;
      short_fac_flag = ixheaacd_read_bits_buf(it_bit_buff, 1);

      fac_length = (short_fac_flag) ? ((usac_data->ccfl) / 16) : ((usac_data->ccfl) / 8);

      fac_data = pstr_td_frame_data->fac_data;
      fac_data[0] = ixheaacd_read_bits_buf(it_bit_buff, 7);
      if ((pstr_td_frame_data->fac_data[0] < 0) || (pstr_td_frame_data->fac_data[0] > 128)) {
        if (usac_data->ec_flag) {
          longjmp(*(it_bit_buff->xaac_jmp_buf),
                  IA_XHEAAC_DEC_EXE_NONFATAL_INSUFFICIENT_INPUT_BYTES);
        } else {
          return IA_FATAL_ERROR;
        }
      }
      ixheaacd_fac_decoding(fac_length, 0, &fac_data[1], it_bit_buff);
    }
    if (fac_data_present == 0) {
      memset(&pstr_td_frame_data->fac_data[0], 0, sizeof(pstr_td_frame_data->fac_data));
    }
    if (usac_data->ec_flag && usac_data->frame_ok) {
      usac_data->bpf_control_info = bpf_control_info;
      usac_data->core_mode_last = core_mode_last;
      usac_data->first_lpd_flag = first_lpd_flag;
    }
  } else {
    usac_data->frame_ok = 0;
  }

  if (usac_data->ec_flag) {
    usac_data->str_error_concealment[chan].pstr_ec_scratch =
        (ia_ec_scratch_str *)&usac_data->str_error_concealment[chan].str_ec_scratch;

    ixheaacd_usac_apply_ec(usac_data, &ixheaacd_samp_rate_info[0], chan);

    if (usac_data->frame_ok == 0) {
      bpf_control_info = usac_data->bpf_control_info;
      core_mode_last = usac_data->core_mode_last;
      first_lpd_flag = usac_data->first_lpd_flag;
    }
  }
  if (usac_data->frame_ok) {
    err = ixheaacd_lpd_dec(usac_data, usac_data->str_tddec[chan], pstr_td_frame_data, synth,
                           first_lpd_flag, short_fac_flag, bpf_control_info);
  } else {
    if (usac_data->ec_flag) {
      usac_data->fac_data_present[chan] = 0;
      err = ixheaacd_lpd_dec(usac_data, usac_data->str_tddec[chan],
                             &usac_data->td_frame_data_prev[chan], synth, first_lpd_flag,
                             short_fac_flag, bpf_control_info);
    }
  }

  return (err);
}

WORD32 ixheaacd_tw_buff_update(ia_usac_data_struct *usac_data, WORD32 i,
                               ia_usac_lpd_decoder_handle st) {
  WORD32 *p_ioverlap = usac_data->overlap_data_ptr[i];
  WORD32 td_frame_prev = usac_data->td_frame_prev[i];
  WORD32 window_sequence_last = usac_data->window_sequence_last[i];
  WORD32 tw_mdct = usac_data->tw_mdct[0];

  if (!td_frame_prev) {
    if (tw_mdct) {
      if (usac_data->ec_flag == 0) {
        return -1;
      } else {
        tw_mdct = 0;
      }
    } else {
      ixheaacd_reset_acelp_data_fix(usac_data, st, p_ioverlap,
                                    (window_sequence_last == EIGHT_SHORT_SEQUENCE), 0);
    }
  }
  return 0;
}

VOID ixheaacd_td_frm_dec(ia_usac_data_struct *usac_data, WORD32 k, WORD32 mod0) {
  WORD32 i;
  WORD32 lfac = 0;

  WORD32 *p_out_idata = usac_data->output_data_ptr[k];
  WORD32 *p_ioverlap = usac_data->overlap_data_ptr[k];
  WORD32 nlong = usac_data->ccfl;
  WORD32 window_sequence_last = usac_data->window_sequence_last[k];
  WORD32 td_frame_prev = usac_data->td_frame_prev[k];
  WORD32 tw_mdct = usac_data->tw_mdct[0];
  WORD32 nshort = nlong / 8;
  WORD32 *p_in_idata = p_out_idata;

  if (!td_frame_prev) {
    if (window_sequence_last == EIGHT_SHORT_SEQUENCE) {
      lfac = nshort / 2;
    } else {
      lfac = nshort;
    }
  }

  if (!td_frame_prev && (mod0 == 0)) {
    for (i = 0; i < (nlong / 2) - lfac - (LEN_SUBFR); i++) {
      p_in_idata[i] = 0;
    }
  } else if (!td_frame_prev && (mod0 > 0)) {
    for (i = 0; i < (nlong / 2) - lfac; i++) {
      p_in_idata[i] = 0;
    }
  }

  if (tw_mdct) {
    if (!td_frame_prev && (mod0 == 0)) {
      for (i = (nlong / 2) - lfac - (LEN_SUBFR); i < nlong / 2; i++) {
        p_ioverlap[i + (nlong / 2)] = 0;
      }
    }
    for (i = 0; i < nlong / 2; i++) {
      p_out_idata[i] = p_ioverlap[i] << 1;
      p_out_idata[i + nlong / 2] =
          ixheaac_add32_sat(p_ioverlap[i + nlong / 2] << 1, p_in_idata[i]);
      p_ioverlap[i] = ixheaac_add32_sat(p_in_idata[i + (nlong / 2)] >> 1, p_ioverlap[i + nlong]);
      p_ioverlap[i + (nlong / 2)] = 0;
      p_ioverlap[i + nlong] = 0;
      p_ioverlap[i + nlong + (nlong / 2)] = 0;
    }
  } else {
    if (!td_frame_prev && (mod0 == 0)) {
      for (i = (nlong / 2) - lfac - (LEN_SUBFR); i < nlong / 2; i++) {
        p_ioverlap[i] = 0;
      }
    } else if (!td_frame_prev) {
      for (i = (nlong / 2) - lfac; i < nlong; i++) {
        p_ioverlap[i] = 0;
      }
    }
    for (i = 0; i < nlong; i++) {
      p_out_idata[i] = ixheaac_add32_sat(p_ioverlap[i] << 1, p_in_idata[i]);
      p_ioverlap[i] = 0;
    }
  }
}

Coverage Report

Created: 2026-08-13 06:34

Line	Count	Source
1		/******************************************************************************
2		* *
3		* Copyright (C) 2018 The Android Open Source Project
4		*
5		* Licensed under the Apache License, Version 2.0 (the "License");
6		* you may not use this file except in compliance with the License.
7		* You may obtain a copy of the License at:
8		*
9		* http://www.apache.org/licenses/LICENSE-2.0
10		*
11		* Unless required by applicable law or agreed to in writing, software
12		* distributed under the License is distributed on an "AS IS" BASIS,
13		* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14		* See the License for the specific language governing permissions and
15		* limitations under the License.
16		*
17		*****************************************************************************
18		* Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore
19		*/
20		#include <string.h>
21		#include "ixheaac_type_def.h"
22
23		#include "ixheaacd_acelp_com.h"
24		#include "ixheaacd_bitbuffer.h"
25
26		#include "ixheaacd_interface.h"
27		#include "ixheaacd_cnst.h"
28		#include "ixheaacd_info.h"
29		#include "ixheaacd_sbr_common.h"
30		#include "ixheaacd_drc_data_struct.h"
31		#include "ixheaacd_defines.h"
32		#include "ixheaacd_aac_rom.h"
33		#include "ixheaacd_pulsedata.h"
34		#include "ixheaacd_pns.h"
35		#include "ixheaac_constants.h"
36		#include "ixheaacd_sbrdecsettings.h"
37		#include "ixheaacd_sbrdecoder.h"
38		#include "ixheaacd_acelp_info.h"
39		#include "ixheaacd_tns_usac.h"
40		#include "ixheaacd_ec_defines.h"
41		#include "ixheaacd_ec_struct_def.h"
42		#include "ixheaacd_main.h"
43		#include "ixheaacd_channelinfo.h"
44		#include "ixheaacd_ec.h"
45		#include "ixheaacd_arith_dec.h"
46		#include "ixheaacd_func_def.h"
47		#include "ixheaac_basic_ops32.h"
48		#include "ixheaac_error_standards.h"
49		#include "ixheaacd_error_codes.h"
50
51		extern const ia_usac_samp_rate_info ixheaacd_samp_rate_info[];
52
53	362k	WORD32 ixheaacd_get_mode_lpc(WORD32 lpc_set, ia_bit_buf_struct it_bit_buff, WORD32 nk_mode) {
54	362k	WORD32 mode_lpc = 0;
55	362k	switch (lpc_set) {
56	85.4k	case 4:
57	85.4k	mode_lpc = 0;
58	85.4k	break;
59	54.0k	case 0:
60	138k	case 2:
61	138k	mode_lpc = ixheaacd_read_bits_buf(it_bit_buff, 1);
62	138k	if (mode_lpc == 1) *nk_mode = 3;
63	138k	break;
64	58.9k	case 1:
65	58.9k	if (ixheaacd_read_bits_buf(it_bit_buff, 1) == 0)
66	38.7k	mode_lpc = *nk_mode = 2;
67	20.2k	else {
68	20.2k	if (ixheaacd_read_bits_buf(it_bit_buff, 1) == 0)
69	16.2k	mode_lpc = *nk_mode = 0;
70	3.98k	else
71	3.98k	mode_lpc = *nk_mode = 1;
72	20.2k	}
73	58.9k	break;
74	78.8k	case 3:
75	78.8k	if (ixheaacd_read_bits_buf(it_bit_buff, 1) == 0)
76	50.7k	mode_lpc = *nk_mode = 1;
77	28.1k	else {
78	28.1k	if (ixheaacd_read_bits_buf(it_bit_buff, 1) == 0)
79	19.0k	mode_lpc = *nk_mode = 0;
80	9.05k	else {
81	9.05k	if (ixheaacd_read_bits_buf(it_bit_buff, 1) == 0)
82	2.49k	mode_lpc = 2;
83	6.56k	else
84	6.56k	mode_lpc = 3;
85	9.05k	*nk_mode = 2;
86	9.05k	}
87	28.1k	}
88	78.8k	break;
89	362k	}
90	362k	return mode_lpc;
91	362k	}
92
93	358k	VOID ixheaacd_qn_data(WORD32 nk_mode, WORD32 qn, ia_bit_buf_struct it_bit_buff) {
94	358k	WORD32 k;
95	358k	switch (nk_mode) {
96	50.7k	case 1:
97	152k	for (k = 0; k < 2; k++) {
98	143k	while (ixheaacd_read_bits_buf(it_bit_buff, 1) == 1) {
99	41.9k	qn[k] += 1;
100	41.9k	}
101	101k	if (qn[k] > 0) qn[k] += 1;
102	101k	}
103	50.7k	break;
104	201k	case 0:
105	249k	case 2:
106	307k	case 3:
107	922k	for (k = 0; k < 2; k++) qn[k] = 2 + ixheaacd_read_bits_buf(it_bit_buff, 2);
108
109	307k	if (nk_mode == 2) {
110	143k	for (k = 0; k < 2; k++) {
111	95.5k	if (qn[k] > 4) {
112	15.1k	qn[k] = 0;
113
114	41.3k	while (ixheaacd_read_bits_buf(it_bit_buff, 1) == 1) qn[k] += 1;
115
116	15.1k	if (qn[k] > 0) qn[k] += 4;
117	15.1k	}
118	95.5k	}
119	259k	} else {
120	778k	for (k = 0; k < 2; k++) {
121	519k	if (qn[k] > 4) {
122	82.8k	WORD32 qn_ext = 0;
123	237k	while (ixheaacd_read_bits_buf(it_bit_buff, 1) == 1) qn_ext += 1;
124
125	82.8k	switch (qn_ext) {
126	44.9k	case 0:
127	44.9k	qn[k] = 5;
128	44.9k	break;
129	18.5k	case 1:
130	18.5k	qn[k] = 6;
131	18.5k	break;
132	5.55k	case 2:
133	5.55k	qn[k] = 0;
134	5.55k	break;
135	13.7k	default:
136	13.7k	qn[k] = qn_ext + 4;
137	13.7k	break;
138	82.8k	}
139	82.8k	}
140	519k	}
141	259k	}
142	307k	break;
143	358k	}
144	358k	return;
145	358k	}
146
147		VOID ixheaacd_code_book_indices(ia_td_frame_data_struct *pstr_td_frame_data, WORD32 nk_mode,
148	358k	WORD32 pos, ia_bit_buf_struct it_bit_buff) {
149	358k	WORD32 k, qn[2] = {0, 0}, nk, n, i;
150
151	358k	ixheaacd_qn_data(nk_mode, &qn[0], it_bit_buff);
152
153	358k	pstr_td_frame_data->lpc_first_approx_idx[(*pos)++] = qn[0];
154	358k	pstr_td_frame_data->lpc_first_approx_idx[(*pos)++] = qn[1];
155
156	1.07M	for (k = 0; k < 2; k++) {
157	716k	if (qn[k] > 0) {
158	627k	if (qn[k] > 4) {
159	84.4k	nk = (qn[k] - 3) / 2;
160	84.4k	n = qn[k] - nk * 2;
161	543k	} else {
162	543k	nk = 0;
163	543k	n = qn[k];
164	543k	}
165	627k	pstr_td_frame_data->lpc_first_approx_idx[(*pos)++] =
166	627k	ixheaacd_read_bits_buf(it_bit_buff, 4 * n);
167
168	5.64M	for (i = 0; i < 8; i++)
169	5.02M	pstr_td_frame_data->lpc_first_approx_idx[(*pos)++] =
170	5.02M	ixheaacd_read_bits_buf(it_bit_buff, nk);
171	627k	}
172	716k	}
173	358k	return;
174	358k	}
175
176		VOID ixheaacd_lpc_data(WORD32 first_lpd_flag, WORD32 mod[],
177		ia_td_frame_data_struct *pstr_td_frame_data,
178	85.4k	ia_bit_buf_struct *it_bit_buff) {
179	85.4k	WORD32 mode_lpc, nk_mode = 0, j = 0;
180
181	85.4k	mode_lpc = ixheaacd_get_mode_lpc(4, it_bit_buff, &nk_mode);
182
183	85.4k	pstr_td_frame_data->lpc_first_approx_idx[j++] = ixheaacd_read_bits_buf(it_bit_buff, 8);
184
185	85.4k	ixheaacd_code_book_indices(pstr_td_frame_data, nk_mode, &j, it_bit_buff);
186	85.4k	if (first_lpd_flag) {
187	54.0k	mode_lpc = ixheaacd_get_mode_lpc(0, it_bit_buff, &nk_mode);
188	54.0k	pstr_td_frame_data->lpc_first_approx_idx[j++] = mode_lpc;
189
190	54.0k	if (mode_lpc == 0)
191	35.6k	pstr_td_frame_data->lpc_first_approx_idx[j++] = ixheaacd_read_bits_buf(it_bit_buff, 8);
192
193	54.0k	ixheaacd_code_book_indices(pstr_td_frame_data, nk_mode, &j, it_bit_buff);
194	54.0k	}
195	85.4k	if (mod[0] < 3) {
196	84.8k	mode_lpc = ixheaacd_get_mode_lpc(2, it_bit_buff, &nk_mode);
197	84.8k	pstr_td_frame_data->lpc_first_approx_idx[j++] = mode_lpc;
198
199	84.8k	if (mode_lpc == 0)
200	58.9k	pstr_td_frame_data->lpc_first_approx_idx[j++] = ixheaacd_read_bits_buf(it_bit_buff, 8);
201
202	84.8k	ixheaacd_code_book_indices(pstr_td_frame_data, nk_mode, &j, it_bit_buff);
203	84.8k	}
204	85.4k	if (mod[0] < 2) {
205	58.9k	mode_lpc = ixheaacd_get_mode_lpc(1, it_bit_buff, &nk_mode);
206	58.9k	pstr_td_frame_data->lpc_first_approx_idx[j++] = mode_lpc;
207
208	58.9k	if (mode_lpc == 0)
209	16.2k	pstr_td_frame_data->lpc_first_approx_idx[j++] = ixheaacd_read_bits_buf(it_bit_buff, 8);
210
211	58.9k	if (mode_lpc != 1) ixheaacd_code_book_indices(pstr_td_frame_data, nk_mode, &j, it_bit_buff);
212	58.9k	}
213	85.4k	if (mod[2] < 2) {
214	78.8k	mode_lpc = ixheaacd_get_mode_lpc(3, it_bit_buff, &nk_mode);
215	78.8k	pstr_td_frame_data->lpc_first_approx_idx[j++] = mode_lpc;
216
217	78.8k	if (mode_lpc == 0)
218	19.0k	pstr_td_frame_data->lpc_first_approx_idx[j++] = ixheaacd_read_bits_buf(it_bit_buff, 8);
219
220	78.8k	ixheaacd_code_book_indices(pstr_td_frame_data, nk_mode, &j, it_bit_buff);
221	78.8k	}
222	85.4k	return;
223	85.4k	}
224
225		VOID ixheaacd_fac_decoding(WORD32 fac_length, WORD32 k, WORD32 *fac_prm,
226	219k	ia_bit_buf_struct *it_bit_buff) {
227	219k	WORD32 i, j, n, qn, nk, kv[8];
228	219k	long code_book_index;
229
230	3.31M	for (i = 0; i < fac_length; i += 8) {
231	3.09M	qn = 0;
232	5.29M	while (ixheaacd_read_bits_buf(it_bit_buff, 1) == 1) {
233	2.20M	qn += 1;
234	2.20M	}
235	3.09M	if (qn != 0) qn += 1;
236
237	3.09M	nk = 0;
238	3.09M	n = qn;
239	3.09M	if (qn > 4) {
240	52.6k	nk = (qn - 3) >> 1;
241	52.6k	n = qn - nk * 2;
242	52.6k	}
243
244	3.09M	code_book_index = ixheaacd_read_bits_buf(it_bit_buff, 4 * n);
245
246	27.8M	for (j = 0; j < 8; j++) {
247	24.7M	kv[j] = ixheaacd_read_bits_buf(it_bit_buff, nk);
248	24.7M	}
249
250	3.09M	ixheaacd_rotated_gosset_mtx_dec(qn, code_book_index, kv, &fac_prm[k * FAC_LENGTH + i]);
251	3.09M	}
252	219k	}
253
254		const UWORD8 ixheaacd_num_bites_celp_coding[8][4] = {
255		{5, 5, 5, 5}, {9, 9, 5, 5}, {9, 9, 9, 9}, {13, 13, 9, 9},
256		{13, 13, 13, 13}, {16, 16, 16, 16}, {1, 5, 1, 5}, {1, 5, 5, 5}};
257
258		VOID ixheaacd_acelp_decoding(WORD32 k, ia_usac_data_struct *usac_data,
259		ia_td_frame_data_struct *pstr_td_frame_data,
260	185k	ia_bit_buf_struct *it_bit_buff, WORD32 chan) {
261	185k	WORD32 sfr, kk;
262	185k	WORD32 nb_subfr = usac_data->num_subfrm;
263	185k	const UWORD8 *ptr_num_bits =
264	185k	&ixheaacd_num_bites_celp_coding[pstr_td_frame_data->acelp_core_mode][0];
265
266	185k	chan = 0;
267	185k	pstr_td_frame_data->mean_energy[k] = ixheaacd_read_bits_buf(it_bit_buff, 2);
268
269	873k	for (sfr = 0; sfr < nb_subfr; sfr++) {
270	687k	kk = k * 4 + sfr;
271
272	687k	if ((sfr == 0) \|\| ((nb_subfr == 4) && (sfr == 2)))
273	315k	pstr_td_frame_data->acb_index[kk] = ixheaacd_read_bits_buf(it_bit_buff, 9);
274
275	371k	else
276	371k	pstr_td_frame_data->acb_index[kk] = ixheaacd_read_bits_buf(it_bit_buff, 6);
277
278	687k	pstr_td_frame_data->ltp_filtering_flag[kk] = ixheaacd_read_bits_buf(it_bit_buff, 1);
279
280	687k	if (pstr_td_frame_data->acelp_core_mode == 5) {
281	67.1k	pstr_td_frame_data->icb_index[kk][0] =
282	67.1k	ixheaacd_read_bits_buf(it_bit_buff, 2);
283	67.1k	pstr_td_frame_data->icb_index[kk][1] =
284	67.1k	ixheaacd_read_bits_buf(it_bit_buff, 2);
285	67.1k	pstr_td_frame_data->icb_index[kk][2] =
286	67.1k	ixheaacd_read_bits_buf(it_bit_buff, 2);
287	67.1k	pstr_td_frame_data->icb_index[kk][3] =
288	67.1k	ixheaacd_read_bits_buf(it_bit_buff, 2);
289	67.1k	pstr_td_frame_data->icb_index[kk][4] =
290	67.1k	ixheaacd_read_bits_buf(it_bit_buff, 14);
291	67.1k	pstr_td_frame_data->icb_index[kk][5] =
292	67.1k	ixheaacd_read_bits_buf(it_bit_buff, 14);
293	67.1k	pstr_td_frame_data->icb_index[kk][6] =
294	67.1k	ixheaacd_read_bits_buf(it_bit_buff, 14);
295	67.1k	pstr_td_frame_data->icb_index[kk][7] =
296	67.1k	ixheaacd_read_bits_buf(it_bit_buff, 14);
297	620k	} else {
298	620k	pstr_td_frame_data->icb_index[kk][0] =
299	620k	ixheaacd_read_bits_buf(it_bit_buff, ptr_num_bits[0]);
300	620k	pstr_td_frame_data->icb_index[kk][1] =
301	620k	ixheaacd_read_bits_buf(it_bit_buff, ptr_num_bits[1]);
302	620k	pstr_td_frame_data->icb_index[kk][2] =
303	620k	ixheaacd_read_bits_buf(it_bit_buff, ptr_num_bits[2]);
304	620k	pstr_td_frame_data->icb_index[kk][3] =
305	620k	ixheaacd_read_bits_buf(it_bit_buff, ptr_num_bits[3]);
306	620k	}
307
308	687k	pstr_td_frame_data->gains[kk] = ixheaacd_read_bits_buf(it_bit_buff, 7);
309	687k	}
310	185k	}
311
312		VOID ixheaacd_tcx_coding(ia_usac_data_struct *usac_data, pWORD32 quant, WORD32 k,
313		WORD32 first_tcx_flag, ia_td_frame_data_struct *pstr_td_frame_data,
314	123k	ia_bit_buf_struct *it_bit_buff) {
315	123k	pstr_td_frame_data->noise_factor[k] = ixheaacd_read_bits_buf(it_bit_buff, 3);
316
317	123k	pstr_td_frame_data->global_gain[k] = ixheaacd_read_bits_buf(it_bit_buff, 7);
318
319	123k	switch (pstr_td_frame_data->mod[k]) {
320	91.3k	case 1:
321	91.3k	pstr_td_frame_data->tcx_lg[k] = usac_data->len_subfrm;
322	91.3k	break;
323	31.9k	case 2:
324	31.9k	pstr_td_frame_data->tcx_lg[k] = 2 * (usac_data->len_subfrm);
325	31.9k	break;
326	613	case 3:
327	613	pstr_td_frame_data->tcx_lg[k] = 4 * (usac_data->len_subfrm);
328	613	break;
329	123k	}
330
331	123k	if (first_tcx_flag) {
332	76.8k	if (usac_data->usac_independency_flg) {
333	29.8k	pstr_td_frame_data->arith_reset_flag = 1;
334	46.9k	} else {
335	46.9k	pstr_td_frame_data->arith_reset_flag = ixheaacd_read_bits_buf(it_bit_buff, 1);
336	46.9k	}
337	76.8k	}
338
339	123k	ixheaacd_arith_data(pstr_td_frame_data, quant, usac_data, it_bit_buff, (first_tcx_flag), k);
340
341	123k	return;
342	123k	}
343
344		WORD32 ixheaacd_lpd_channel_stream(ia_usac_data_struct *usac_data,
345		ia_td_frame_data_struct *pstr_td_frame_data,
346	93.8k	ia_bit_buf_struct it_bit_buff, FLOAT32 synth) {
347	93.8k	WORD32 lpd_mode, k, cnt, ii;
348	93.8k	WORD32 first_tcx_flag;
349	93.8k	WORD32 *quant;
350	93.8k	WORD32 core_mode_last = 0, fac_data_present;
351	93.8k	WORD32 *fac_data;
352	93.8k	WORD32 first_lpd_flag = 0;
353	93.8k	WORD32 short_fac_flag;
354	93.8k	WORD32 bpf_control_info = 0;
355	93.8k	WORD32 chan = usac_data->present_chan;
356	93.8k	WORD32 last_lpd_mode = usac_data->str_tddec[chan]->mode_prev;
357	93.8k	WORD32 err = 0;
358	93.8k	short_fac_flag = 0;
359
360	93.8k	jmp_buf local;
361
362	93.8k	if (usac_data->ec_flag) {
363	0	err = setjmp(local);
364	0	}
365
366	93.8k	if (usac_data->sampling_rate_idx <= 5 && usac_data->ec_flag) {
367	0	usac_data->frame_ok = 0;
368	0	}
369
370	93.8k	if (err == 0 && usac_data->frame_ok == 1) {
371	93.8k	if (usac_data->ec_flag) {
372	0	it_bit_buff->xaac_jmp_buf = &local;
373	0	}
374	93.8k	pstr_td_frame_data->acelp_core_mode = ixheaacd_read_bits_buf(it_bit_buff, 3);
375
376	93.8k	lpd_mode = ixheaacd_read_bits_buf(it_bit_buff, 5);
377
378	93.8k	if ((lpd_mode > 25 \|\| lpd_mode < 0)) {
379	7.78k	if (usac_data->ec_flag) {
380	0	longjmp(*(it_bit_buff->xaac_jmp_buf),
381	0	IA_XHEAAC_DEC_EXE_NONFATAL_INSUFFICIENT_INPUT_BYTES);
382	7.78k	} else {
383	7.78k	return IA_FATAL_ERROR;
384	7.78k	}
385	7.78k	}
386
387	86.0k	if (lpd_mode == 25) {
388	613	pstr_td_frame_data->mod[0] = pstr_td_frame_data->mod[1] = pstr_td_frame_data->mod[2] =
389	613	pstr_td_frame_data->mod[3] = 3;
390	85.4k	} else if (lpd_mode == 24) {
391	815	pstr_td_frame_data->mod[0] = pstr_td_frame_data->mod[1] = pstr_td_frame_data->mod[2] =
392	815	pstr_td_frame_data->mod[3] = 2;
393	84.6k	} else {
394	84.6k	if (lpd_mode >= 20) {
395	5.19k	pstr_td_frame_data->mod[0] = lpd_mode & 1;
396	5.19k	pstr_td_frame_data->mod[1] = (lpd_mode >> 1) & 1;
397	5.19k	pstr_td_frame_data->mod[2] = pstr_td_frame_data->mod[3] = 2;
398	79.4k	} else if (lpd_mode >= 16) {
399	25.1k	pstr_td_frame_data->mod[0] = pstr_td_frame_data->mod[1] = 2;
400	25.1k	pstr_td_frame_data->mod[2] = lpd_mode & 1;
401	25.1k	pstr_td_frame_data->mod[3] = (lpd_mode >> 1) & 1;
402	54.3k	} else {
403	54.3k	pstr_td_frame_data->mod[0] = lpd_mode & 1;
404	54.3k	pstr_td_frame_data->mod[1] = (lpd_mode >> 1) & 1;
405	54.3k	pstr_td_frame_data->mod[2] = (lpd_mode >> 2) & 1;
406	54.3k	pstr_td_frame_data->mod[3] = (lpd_mode >> 3) & 1;
407	54.3k	}
408	84.6k	}
409
410	86.0k	bpf_control_info = ixheaacd_read_bits_buf(it_bit_buff, 1);
411
412	86.0k	core_mode_last = ixheaacd_read_bits_buf(it_bit_buff, 1);
413
414	86.0k	fac_data_present = ixheaacd_read_bits_buf(it_bit_buff, 1);
415
416	86.0k	first_lpd_flag = (core_mode_last == 0) ? 1 : 0;
417
418	86.0k	quant = pstr_td_frame_data->x_tcx_invquant;
419	86.0k	first_tcx_flag = 1;
420	86.0k	k = 0;
421	395k	while (k < 4) {
422	309k	if (k == 0) {
423	86.0k	if ((core_mode_last == 1) && (fac_data_present == 1))
424	12.3k	ixheaacd_fac_decoding((usac_data->len_subfrm) / 2, k, pstr_td_frame_data->fac,
425	12.3k	it_bit_buff);
426	223k	} else {
427	223k	if (((last_lpd_mode == 0) && (pstr_td_frame_data->mod[k] > 0)) \|\|
428	193k	((last_lpd_mode > 0) && (pstr_td_frame_data->mod[k] == 0)))
429	95.6k	ixheaacd_fac_decoding((usac_data->len_subfrm) / 2, k, pstr_td_frame_data->fac,
430	95.6k	it_bit_buff);
431	223k	}
432
433	309k	if (pstr_td_frame_data->mod[k] == 0) {
434	185k	ixheaacd_acelp_decoding(k, usac_data, pstr_td_frame_data, it_bit_buff, chan);
435	185k	last_lpd_mode = 0;
436	185k	pstr_td_frame_data->tcx_lg[k] = 0;
437	185k	k += 1;
438	185k	} else {
439	123k	ixheaacd_tcx_coding(usac_data, quant, k, first_tcx_flag, pstr_td_frame_data, it_bit_buff);
440	123k	last_lpd_mode = pstr_td_frame_data->mod[k];
441	123k	quant += pstr_td_frame_data->tcx_lg[k];
442
443	123k	cnt = 1 << (pstr_td_frame_data->mod[k] - 1);
444
445	157k	for (ii = 0; ii < cnt - 1; ii++) pstr_td_frame_data->tcx_lg[k + 1 + ii] = 0;
446
447	123k	k += cnt;
448	123k	first_tcx_flag = 0;
449	123k	}
450	309k	}
451
452	86.0k	ixheaacd_lpc_data(first_lpd_flag, pstr_td_frame_data->mod, pstr_td_frame_data, it_bit_buff);
453
454	86.0k	if ((core_mode_last == 0) && (fac_data_present == 1)) {
455	11.5k	WORD32 fac_length;
456	11.5k	short_fac_flag = ixheaacd_read_bits_buf(it_bit_buff, 1);
457
458	11.5k	fac_length = (short_fac_flag) ? ((usac_data->ccfl) / 16) : ((usac_data->ccfl) / 8);
459
460	11.5k	fac_data = pstr_td_frame_data->fac_data;
461	11.5k	fac_data[0] = ixheaacd_read_bits_buf(it_bit_buff, 7);
462	11.5k	if ((pstr_td_frame_data->fac_data[0] < 0) \|\| (pstr_td_frame_data->fac_data[0] > 128)) {
463	0	if (usac_data->ec_flag) {
464	0	longjmp(*(it_bit_buff->xaac_jmp_buf),
465	0	IA_XHEAAC_DEC_EXE_NONFATAL_INSUFFICIENT_INPUT_BYTES);
466	0	} else {
467	0	return IA_FATAL_ERROR;
468	0	}
469	0	}
470	11.5k	ixheaacd_fac_decoding(fac_length, 0, &fac_data[1], it_bit_buff);
471	11.5k	}
472	86.0k	if (fac_data_present == 0) {
473	61.5k	memset(&pstr_td_frame_data->fac_data[0], 0, sizeof(pstr_td_frame_data->fac_data));
474	61.5k	}
475	86.0k	if (usac_data->ec_flag && usac_data->frame_ok) {
476	0	usac_data->bpf_control_info = bpf_control_info;
477	0	usac_data->core_mode_last = core_mode_last;
478	0	usac_data->first_lpd_flag = first_lpd_flag;
479	0	}
480	86.0k	} else {
481	0	usac_data->frame_ok = 0;
482	0	}
483
484	86.0k	if (usac_data->ec_flag) {
485	0	usac_data->str_error_concealment[chan].pstr_ec_scratch =
486	0	(ia_ec_scratch_str *)&usac_data->str_error_concealment[chan].str_ec_scratch;
487
488	0	ixheaacd_usac_apply_ec(usac_data, &ixheaacd_samp_rate_info[0], chan);
489
490	0	if (usac_data->frame_ok == 0) {
491	0	bpf_control_info = usac_data->bpf_control_info;
492	0	core_mode_last = usac_data->core_mode_last;
493	0	first_lpd_flag = usac_data->first_lpd_flag;
494	0	}
495	0	}
496	86.0k	if (usac_data->frame_ok) {
497	85.3k	err = ixheaacd_lpd_dec(usac_data, usac_data->str_tddec[chan], pstr_td_frame_data, synth,
498	85.3k	first_lpd_flag, short_fac_flag, bpf_control_info);
499	85.3k	} else {
500	774	if (usac_data->ec_flag) {
501	0	usac_data->fac_data_present[chan] = 0;
502	0	err = ixheaacd_lpd_dec(usac_data, usac_data->str_tddec[chan],
503	0	&usac_data->td_frame_data_prev[chan], synth, first_lpd_flag,
504	0	short_fac_flag, bpf_control_info);
505	0	}
506	774	}
507
508	86.0k	return (err);
509	93.8k	}
510
511		WORD32 ixheaacd_tw_buff_update(ia_usac_data_struct *usac_data, WORD32 i,
512	93.8k	ia_usac_lpd_decoder_handle st) {
513	93.8k	WORD32 *p_ioverlap = usac_data->overlap_data_ptr[i];
514	93.8k	WORD32 td_frame_prev = usac_data->td_frame_prev[i];
515	93.8k	WORD32 window_sequence_last = usac_data->window_sequence_last[i];
516	93.8k	WORD32 tw_mdct = usac_data->tw_mdct[0];
517
518	93.8k	if (!td_frame_prev) {
519	22.3k	if (tw_mdct) {
520	0	if (usac_data->ec_flag == 0) {
521	0	return -1;
522	0	} else {
523	0	tw_mdct = 0;
524	0	}
525	22.3k	} else {
526	22.3k	ixheaacd_reset_acelp_data_fix(usac_data, st, p_ioverlap,
527	22.3k	(window_sequence_last == EIGHT_SHORT_SEQUENCE), 0);
528	22.3k	}
529	22.3k	}
530	93.8k	return 0;
531	93.8k	}
532
533	93.0k	VOID ixheaacd_td_frm_dec(ia_usac_data_struct *usac_data, WORD32 k, WORD32 mod0) {
534	93.0k	WORD32 i;
535	93.0k	WORD32 lfac = 0;
536
537	93.0k	WORD32 *p_out_idata = usac_data->output_data_ptr[k];
538	93.0k	WORD32 *p_ioverlap = usac_data->overlap_data_ptr[k];
539	93.0k	WORD32 nlong = usac_data->ccfl;
540	93.0k	WORD32 window_sequence_last = usac_data->window_sequence_last[k];
541	93.0k	WORD32 td_frame_prev = usac_data->td_frame_prev[k];
542	93.0k	WORD32 tw_mdct = usac_data->tw_mdct[0];
543	93.0k	WORD32 nshort = nlong / 8;
544	93.0k	WORD32 *p_in_idata = p_out_idata;
545
546	93.0k	if (!td_frame_prev) {
547	21.8k	if (window_sequence_last == EIGHT_SHORT_SEQUENCE) {
548	8.67k	lfac = nshort / 2;
549	13.1k	} else {
550	13.1k	lfac = nshort;
551	13.1k	}
552	21.8k	}
553
554	93.0k	if (!td_frame_prev && (mod0 == 0)) {
555	2.76M	for (i = 0; i < (nlong / 2) - lfac - (LEN_SUBFR); i++) {
556	2.75M	p_in_idata[i] = 0;
557	2.75M	}
558	84.6k	} else if (!td_frame_prev && (mod0 > 0)) {
559	5.31M	for (i = 0; i < (nlong / 2) - lfac; i++) {
560	5.30M	p_in_idata[i] = 0;
561	5.30M	}
562	13.4k	}
563
564	93.0k	if (tw_mdct) {
565	0	if (!td_frame_prev && (mod0 == 0)) {
566	0	for (i = (nlong / 2) - lfac - (LEN_SUBFR); i < nlong / 2; i++) {
567	0	p_ioverlap[i + (nlong / 2)] = 0;
568	0	}
569	0	}
570	0	for (i = 0; i < nlong / 2; i++) {
571	0	p_out_idata[i] = p_ioverlap[i] << 1;
572	0	p_out_idata[i + nlong / 2] =
573	0	ixheaac_add32_sat(p_ioverlap[i + nlong / 2] << 1, p_in_idata[i]);
574	0	p_ioverlap[i] = ixheaac_add32_sat(p_in_idata[i + (nlong / 2)] >> 1, p_ioverlap[i + nlong]);
575	0	p_ioverlap[i + (nlong / 2)] = 0;
576	0	p_ioverlap[i + nlong] = 0;
577	0	p_ioverlap[i + nlong + (nlong / 2)] = 0;
578	0	}
579	93.0k	} else {
580	93.0k	if (!td_frame_prev && (mod0 == 0)) {
581	1.37M	for (i = (nlong / 2) - lfac - (LEN_SUBFR); i < nlong / 2; i++) {
582	1.36M	p_ioverlap[i] = 0;
583	1.36M	}
584	84.6k	} else if (!td_frame_prev) {
585	7.95M	for (i = (nlong / 2) - lfac; i < nlong; i++) {
586	7.94M	p_ioverlap[i] = 0;
587	7.94M	}
588	13.4k	}
589	87.4M	for (i = 0; i < nlong; i++) {
590	87.3M	p_out_idata[i] = ixheaac_add32_sat(p_ioverlap[i] << 1, p_in_idata[i]);
591	87.3M	p_ioverlap[i] = 0;
592	87.3M	}
593	93.0k	}
594	93.0k	}