/src/libxaac/decoder/ixheaacd_pns_js_thumb.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 <stdio.h>
#include <stdlib.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_error_codes.h"
#include "ixheaacd_defines.h"
#include "ixheaacd_aac_rom.h"
#include "ixheaacd_common_rom.h"
#include "ixheaacd_basic_funcs.h"
#include "ixheaacd_aac_imdct.h"
#include "ixheaac_basic_op.h"
#include "ixheaacd_intrinsics.h"

#include "ixheaacd_pulsedata.h"

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

#include "ixheaacd_lt_predict.h"
#include "ixheaacd_cnst.h"
#include "ixheaacd_ec_defines.h"
#include "ixheaacd_ec_struct_def.h"
#include "ixheaacd_channelinfo.h"
#include "ixheaacd_drc_dec.h"
#include "ixheaacd_sbrdecoder.h"
#include "ixheaacd_block.h"

#include "ixheaacd_channel.h"

#include "ixheaacd_audioobjtypes.h"
#include "ixheaacd_latmdemux.h"
#include "ixheaacd_aacdec.h"
#include "ixheaacd_tns.h"
#include "ixheaacd_function_selector.h"

static PLATFORM_INLINE WORD16 ixheaacd_is_correlation(
    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;

  return ((ptr_corr_info->correlated[(pns_band >> PNS_BAND_FLAGS_SHIFT)] >>
           (pns_band & PNS_BAND_FLAGS_MASK)) &
          1);
}

VOID ixheaacd_gen_rand_vec(WORD32 scale, WORD shift, WORD32 *ptr_spec_coef,
                           WORD32 sfb_width, WORD32 *seed) {
  WORD nrg_scale;
  WORD32 nrg = 0;
  WORD32 *spec = ptr_spec_coef;
  WORD32 sfb;

  for (sfb = 0; sfb <= sfb_width; sfb++) {
    *seed = (WORD32)(((WORD64)1664525 * (WORD64)(*seed)) + (WORD64)1013904223);

    *spec = (*seed >> 3);

    nrg = ixheaac_add32_sat(nrg, ixheaac_mult32_shl_sat(*spec, *spec));

    spec++;
  }

  nrg_scale = ixheaac_norm32(nrg);

  if (nrg_scale > 0) {
    nrg_scale &= ~1;
    nrg = ixheaac_shl32_sat(nrg, nrg_scale);
    shift = shift - (nrg_scale >> 1);
  }

  nrg = ixheaacd_sqrt(nrg);
  scale = ixheaac_div32_pos_normb(scale, nrg);

  spec = ptr_spec_coef;

  if (shift < -31) {
    shift = -31;
  }
  for (sfb = 0; sfb <= sfb_width; sfb++) {
    *spec = ixheaac_shr32_dir_sat_limit(ixheaac_mult32_shl_sat(*spec, scale),
                                         shift);
    spec++;
  }
}

VOID ixheaacd_pns_process(ia_aac_dec_channel_info_struct *ptr_aac_dec_channel_info[CHANNELS],
                          WORD32 channel, ia_aac_dec_tables_struct *ptr_aac_tables) {
  ia_pns_info_struct *ptr_pns_info =
      &ptr_aac_dec_channel_info[channel]->str_pns_info;
  ia_ics_info_struct *ptr_ics_info =
      &ptr_aac_dec_channel_info[channel]->str_ics_info;
  WORD16 maximum_bins_short = ptr_ics_info->frame_length >> 3;
  WORD32 *ptr_scale_mant_tab =
      ptr_aac_tables->pstr_block_tables->scale_mant_tab;

  if (ptr_pns_info->pns_active) {
    const WORD16 *swb_offset =
        ptr_aac_tables->str_aac_sfb_info[ptr_ics_info->window_sequence]
            .sfb_index;

    WORD num_win_group, grp_len, sfb;
    WORD32 *spec = &ptr_aac_dec_channel_info[channel]->ptr_spec_coeff[0];

    for (num_win_group = 0; num_win_group < ptr_ics_info->num_window_groups;
         num_win_group++) {
      grp_len = ptr_ics_info->window_group_length[num_win_group];

      for (grp_len = 0;
           grp_len < ptr_ics_info->window_group_length[num_win_group];
           grp_len++) {
        for (sfb = 0; sfb < ptr_ics_info->max_sfb; sfb++) {
          WORD16 pns_band = ((num_win_group << 4) + sfb);

          if (ptr_aac_dec_channel_info[channel]
                  ->str_pns_info.pns_used[pns_band]) {
            WORD32 scale_mant;
            WORD32 scale_exp;
            WORD32 sfb_width = swb_offset[sfb + 1] - swb_offset[sfb] - 1;
            WORD32 *ptr_spec = &spec[swb_offset[sfb]];

            scale_mant = ptr_scale_mant_tab[ptr_aac_dec_channel_info[channel]
                                                ->ptr_scale_factor[pns_band] &
                                            PNS_SCALE_MANT_TAB_MASK];
            scale_exp = add_d(sub_d(31, (ptr_aac_dec_channel_info[channel]
                                             ->ptr_scale_factor[pns_band] >>
                                         PNS_SCALEFACTOR_SCALING)),
                              PNS_SCALE_MANT_TAB_SCALING);

            if (ixheaacd_is_correlation(ptr_aac_dec_channel_info[LEFT],
                                        pns_band)) {
              if (channel == 0) {
                ptr_aac_dec_channel_info[LEFT]
                    ->pstr_pns_corr_info->random_vector[pns_band] =
                    ptr_aac_dec_channel_info[LEFT]
                        ->pstr_pns_rand_vec_data->current_seed;

                ixheaacd_gen_rand_vec(
                    scale_mant, scale_exp, ptr_spec, sfb_width,
                    &(ptr_aac_dec_channel_info[LEFT]
                          ->pstr_pns_rand_vec_data->current_seed));
              }

              else {
                ixheaacd_gen_rand_vec(
                    scale_mant, scale_exp, ptr_spec, sfb_width,
                    &(ptr_aac_dec_channel_info[LEFT]
                          ->pstr_pns_corr_info->random_vector[pns_band]));
              }

            }

            else {
              ixheaacd_gen_rand_vec(
                  scale_mant, scale_exp, ptr_spec, sfb_width,
                  &(ptr_aac_dec_channel_info[LEFT]
                        ->pstr_pns_rand_vec_data->current_seed));
            }
          }
        }

        if (maximum_bins_short == 120)
          spec += maximum_bins_short;
        else
          spec += 128;
      }
    }
  }

  if (channel == 0) {
    ptr_aac_dec_channel_info[0]->pstr_pns_rand_vec_data->pns_frame_number++;
  }
}

VOID ixheaacd_tns_decode_coef(const ia_filter_info_struct *filter,
                              WORD16 *parcor_coef,
                              ia_aac_dec_tables_struct *ptr_aac_tables) {
  WORD order, resolution;
  WORD16 *ptr_par_coef = parcor_coef;
  WORD16 *tns_coeff_ptr;
  WORD8 ixheaacd_drc_offset = 4;
  WORD8 *ptr_coef = (WORD8 *)filter->coef;

  resolution = filter->resolution;
  tns_coeff_ptr = ptr_aac_tables->pstr_block_tables->tns_coeff3_16;

  if (resolution) {
    tns_coeff_ptr = ptr_aac_tables->pstr_block_tables->tns_coeff4_16;
    ixheaacd_drc_offset = ixheaacd_drc_offset << 1;
  }

  for (order = 0; order < filter->order; order++) {
    WORD8 temp = *ptr_coef++;
    *ptr_par_coef++ = tns_coeff_ptr[temp + ixheaacd_drc_offset];
  }
}

VOID ixheaacd_tns_decode_coef_ld(const ia_filter_info_struct *filter,
                                 WORD32 *parcor_coef,
                                 ia_aac_dec_tables_struct *ptr_aac_tables) {
  WORD order, resolution;
  WORD32 *ptr_par_coef = parcor_coef;
  WORD32 *tns_coeff_ptr;
  WORD8 offset = 4;
  WORD8 *ptr_coef = (WORD8 *)filter->coef;

  resolution = filter->resolution;
  tns_coeff_ptr = ptr_aac_tables->pstr_block_tables->tns_coeff3;

  if (resolution) {
    tns_coeff_ptr = ptr_aac_tables->pstr_block_tables->tns_coeff4;
    offset = offset << 1;
  }

  for (order = 0; order < filter->order; order++) {
    WORD8 temp = *ptr_coef++;
    *ptr_par_coef++ = tns_coeff_ptr[temp + offset];
  }
}

VOID ixheaacd_aac_tns_process(
    ia_aac_dec_channel_info_struct *ptr_aac_dec_channel_info, WORD32 num_ch,
    ia_aac_dec_tables_struct *ptr_aac_tables, WORD32 object_type,
    WORD32 ar_flag, WORD32 *predicted_spectrum) {
  WORD i;
  WORD16 scale_lpc;

  ia_tns_info_aac_struct *ptr_tns_info =
      &ptr_aac_dec_channel_info->str_tns_info;
  WORD32 *spec = ptr_aac_dec_channel_info->ptr_spec_coeff;
  WORD32 *scratch_buf = ptr_aac_dec_channel_info->scratch_buf_ptr;

  WORD win, filt, start, stop, size, scale_spec;
  ia_ics_info_struct *ptr_ics_info = &ptr_aac_dec_channel_info->str_ics_info;
  WORD num_window, tns_max_bands, win_seq;
  WORD16 maximum_bins_short = ptr_ics_info->frame_length >> 3;
  WORD position;

  WORD32 parcor_coef[MAX_ORDER + 1];
  WORD16 parcor_coef_16[MAX_ORDER + 1];

  WORD32 lpc_coef[MAX_ORDER + 1];
  WORD16 lpc_coef_16[MAX_ORDER + 1];

  const WORD16 *ptr_sfb_table;

  WORD16 max_bin_long = ptr_ics_info->frame_length;

  win_seq = ptr_ics_info->window_sequence == 0
                ? 0
                : (ptr_ics_info->window_sequence % 2 == 0);

  if (ar_flag)
    spec = ptr_aac_dec_channel_info->ptr_spec_coeff;
  else {
    spec = predicted_spectrum;
  }

  if (object_type == AOT_ER_AAC_ELD || object_type == AOT_ER_AAC_LD ||
      object_type == AOT_AAC_LTP) {
    if (512 == ptr_ics_info->frame_length) {
      tns_max_bands =
          ptr_aac_tables->pstr_block_tables
              ->tns_max_bands_tbl_ld[ptr_ics_info->sampling_rate_index];
      win_seq = 1;
      num_window = win_seq;
    } else if (480 == ptr_ics_info->frame_length) {
      tns_max_bands =
          ptr_aac_tables->pstr_block_tables
              ->tns_max_bands_tbl_480[ptr_ics_info->sampling_rate_index];
      win_seq = 1;
      num_window = win_seq;
    } else {
      tns_max_bands =
          ptr_aac_tables->pstr_block_tables
              ->tns_max_bands_tbl[ptr_ics_info->sampling_rate_index][win_seq];

      num_window = win_seq ? 8 : 1;
    }
  } else {
    tns_max_bands =
        ptr_aac_tables->pstr_block_tables
            ->tns_max_bands_tbl[ptr_ics_info->sampling_rate_index][win_seq];

    num_window = win_seq ? 8 : 1;
  }

  ptr_sfb_table =
      ptr_aac_tables->str_aac_sfb_info[ptr_ics_info->window_sequence].sfb_index;

  for (win = 0; win < num_window; win++) {
    WORD n_filt = ptr_tns_info->n_filt[win];

    for (filt = 0; filt < n_filt; filt++) {
      ia_filter_info_struct *filter = &ptr_tns_info->str_filter[win][filt];

      if (filter->order <= 0) {
        continue;
      }

      if ((object_type == AOT_ER_AAC_LD) || (object_type == AOT_AAC_LTP) ||
          (num_ch > 2)) {
        ixheaacd_tns_decode_coefficients(filter, parcor_coef, ptr_aac_tables);

      } else {
        ixheaacd_tns_decode_coef(filter, parcor_coef_16, ptr_aac_tables);
      }

      start = ixheaac_min32(ixheaac_min32(filter->start_band, tns_max_bands),
                             ptr_ics_info->max_sfb);

      start = ptr_sfb_table[start];

      stop = ixheaac_min32(ixheaac_min32(filter->stop_band, tns_max_bands),
                            ptr_ics_info->max_sfb);

      stop = ptr_sfb_table[stop];

      size = (stop - start);

      if (size <= 0) {
        continue;
      }
      if ((object_type == AOT_ER_AAC_LD) || (object_type == AOT_AAC_LTP) ||
          (num_ch > 2)) {
        ixheaacd_tns_parcor_to_lpc(parcor_coef, lpc_coef, &scale_lpc,
                                   filter->order);

      } else {
        (*ixheaacd_tns_parcor_lpc_convert)(parcor_coef_16, lpc_coef_16,
                                           &scale_lpc, filter->order);
      }

      {
        WORD32 *ptr_tmp;

        if (maximum_bins_short == 120)
          ptr_tmp = spec + (win * maximum_bins_short) + start;
        else
          ptr_tmp = spec + (win << 7) + start;

        scale_spec = (*ixheaacd_calc_max_spectral_line)(ptr_tmp, size);
      }

      if (filter->direction == -1) {
        position = stop - 1;

        if (maximum_bins_short == 120) {
          if (((win * maximum_bins_short) + position) < filter->order) continue;
        } else {
          if (((win << 7) + position) < filter->order) continue;
        }

      } else {
        position = start;
        if (maximum_bins_short == 120) {
          if ((((win * maximum_bins_short) + position) + filter->order) > max_bin_long)
            continue;
        } else {
          if ((((win << 7) + position) + filter->order) > MAX_BINS_LONG) continue;
        }
      }

      if ((num_ch <= 2) &&
          ((object_type != AOT_ER_AAC_LD) && (object_type != AOT_AAC_LTP)))
        scale_spec = ((scale_spec - 4) - scale_lpc);
      else {
        if (scale_spec > 17)
          scale_spec = ((scale_spec - 6) - scale_lpc);
        else if (scale_spec > 11)
          scale_spec = ((scale_spec - 5) - scale_lpc);
        else
          scale_spec = ((scale_spec - 4) - scale_lpc);
      }

      if (scale_spec > 0) {
        scale_spec = ixheaac_min32(scale_spec, 31);

        if ((object_type == AOT_ER_AAC_LD) || (object_type == AOT_AAC_LTP) ||
            (num_ch > 2)) {
          if (ar_flag)
          {
            if (maximum_bins_short == 120) {
              (*ixheaacd_tns_ar_filter_fixed)(&spec[(win * maximum_bins_short) + position],
                                              size, filter->direction,
                                              (WORD32 *)lpc_coef, filter->order,
                                              (WORD32)scale_lpc, scale_spec);
            } else {
              (*ixheaacd_tns_ar_filter_fixed)(&spec[(win << 7) + position], size,
                                              filter->direction,
                                              (WORD32 *)lpc_coef, filter->order,
                                              (WORD32)scale_lpc, scale_spec);
            }
          } else {
            if (maximum_bins_short == 120) {
              ixheaacd_tns_ma_filter_fixed_ld(&spec[(win * maximum_bins_short) + position],
                                              size, filter->direction, lpc_coef,
                                              filter->order, scale_lpc);
            } else {
              ixheaacd_tns_ma_filter_fixed_ld(&spec[(win << 7) + position], size,
                                              filter->direction, lpc_coef,
                                              filter->order, scale_lpc);
            }
          }
        } else {
          if (object_type == AOT_ER_AAC_ELD) scale_spec = scale_spec - 1;
          if (maximum_bins_short == 120) {
            (*ixheaacd_tns_ar_filter)(&spec[(win * maximum_bins_short) + position], size,
                                      filter->direction, lpc_coef_16,
                                      filter->order, (WORD32)scale_lpc,
                                      scale_spec, scratch_buf);
          } else {
            (*ixheaacd_tns_ar_filter)(&spec[(win << 7) + position], size,
                                      filter->direction, lpc_coef_16,
                                      filter->order, (WORD32)scale_lpc,
                                      scale_spec, scratch_buf);
          }
        }
      }

      else {
        WORD32 *ptr_tmp;

        if (maximum_bins_short == 120)
          ptr_tmp = spec + (win * maximum_bins_short) + start;
        else
          ptr_tmp = spec + (win >> 7) + start;

        scale_spec = -scale_spec;
        scale_spec = ixheaac_min32(scale_spec, 31);

        for (i = size; i != 0; i--) {
          *ptr_tmp = (*ptr_tmp >> scale_spec);
          ptr_tmp++;
        }

        if ((object_type == AOT_ER_AAC_LD) || (object_type == AOT_AAC_LTP) ||
            num_ch > 2) {
          if (ar_flag) {
            if (maximum_bins_short == 120) {
              (*ixheaacd_tns_ar_filter_fixed)(
                  &spec[(win * maximum_bins_short) + position], size, filter->direction,
                  (WORD32 *)lpc_coef, filter->order, scale_lpc, 0);
            } else {
              (*ixheaacd_tns_ar_filter_fixed)(
                  &spec[(win << 7) + position], size, filter->direction,
                  (WORD32 *)lpc_coef, filter->order, scale_lpc, 0);
            }
          } else {
            if (maximum_bins_short == 120) {
              ixheaacd_tns_ma_filter_fixed_ld(&spec[(win * maximum_bins_short) + position],
                                              size, filter->direction, lpc_coef,
                                              filter->order, scale_lpc);
            } else {
              ixheaacd_tns_ma_filter_fixed_ld(&spec[(win << 7) + position], size,
                                              filter->direction, lpc_coef,
                                              filter->order, scale_lpc);
            }
          }
        } else {
          if (object_type == AOT_ER_AAC_ELD) {
            scale_lpc = scale_lpc - 1;
          }

          if (maximum_bins_short == 120) {
            (*ixheaacd_tns_ar_filter)(&spec[(win * maximum_bins_short) + position], size,
                                      filter->direction, lpc_coef_16,
                                      filter->order, scale_lpc, 0, scratch_buf);
          } else {
            (*ixheaacd_tns_ar_filter)(&spec[(win << 7) + position], size,
                                      filter->direction, lpc_coef_16,
                                      filter->order, scale_lpc, 0, scratch_buf);
          }
        }

        if (maximum_bins_short == 120)
          ptr_tmp = spec + (win * maximum_bins_short) + start;
        else
          ptr_tmp = spec + (win << 7) + start;

        for (i = size; i != 0; i--) {
          *ptr_tmp = (*ptr_tmp << scale_spec);
          ptr_tmp++;
        }
      }
    }
  }
}

Coverage Report

Created: 2025-11-10 06:22

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 <stdio.h>
22		#include <stdlib.h>
23		#include "ixheaacd_sbr_common.h"
24		#include "ixheaac_type_def.h"
25		#include "ixheaac_constants.h"
26		#include "ixheaac_basic_ops32.h"
27		#include "ixheaac_basic_ops16.h"
28		#include "ixheaac_basic_ops40.h"
29		#include "ixheaac_basic_ops.h"
30
31		#include "ixheaacd_bitbuffer.h"
32
33		#include "ixheaacd_error_codes.h"
34		#include "ixheaacd_defines.h"
35		#include "ixheaacd_aac_rom.h"
36		#include "ixheaacd_common_rom.h"
37		#include "ixheaacd_basic_funcs.h"
38		#include "ixheaacd_aac_imdct.h"
39		#include "ixheaac_basic_op.h"
40		#include "ixheaacd_intrinsics.h"
41
42		#include "ixheaacd_pulsedata.h"
43
44		#include "ixheaacd_pns.h"
45		#include "ixheaacd_drc_data_struct.h"
46
47		#include "ixheaacd_lt_predict.h"
48		#include "ixheaacd_cnst.h"
49		#include "ixheaacd_ec_defines.h"
50		#include "ixheaacd_ec_struct_def.h"
51		#include "ixheaacd_channelinfo.h"
52		#include "ixheaacd_drc_dec.h"
53		#include "ixheaacd_sbrdecoder.h"
54		#include "ixheaacd_block.h"
55
56		#include "ixheaacd_channel.h"
57
58		#include "ixheaacd_audioobjtypes.h"
59		#include "ixheaacd_latmdemux.h"
60		#include "ixheaacd_aacdec.h"
61		#include "ixheaacd_tns.h"
62		#include "ixheaacd_function_selector.h"
63
64		static PLATFORM_INLINE WORD16 ixheaacd_is_correlation(
65	586k	ia_aac_dec_channel_info_struct *ptr_aac_dec_channel_info, WORD16 pns_band) {
66	586k	ia_pns_correlation_info_struct *ptr_corr_info =
67	586k	ptr_aac_dec_channel_info->pstr_pns_corr_info;
68
69	586k	return ((ptr_corr_info->correlated[(pns_band >> PNS_BAND_FLAGS_SHIFT)] >>
70	586k	(pns_band & PNS_BAND_FLAGS_MASK)) &
71	586k	1);
72	586k	}
73
74		VOID ixheaacd_gen_rand_vec(WORD32 scale, WORD shift, WORD32 *ptr_spec_coef,
75	586k	WORD32 sfb_width, WORD32 *seed) {
76	586k	WORD nrg_scale;
77	586k	WORD32 nrg = 0;
78	586k	WORD32 *spec = ptr_spec_coef;
79	586k	WORD32 sfb;
80
81	7.35M	for (sfb = 0; sfb <= sfb_width; sfb++) {
82	6.76M	seed = (WORD32)(((WORD64)1664525 (WORD64)(*seed)) + (WORD64)1013904223);
83
84	6.76M	spec = (seed >> 3);
85
86	6.76M	nrg = ixheaac_add32_sat(nrg, ixheaac_mult32_shl_sat(spec, spec));
87
88	6.76M	spec++;
89	6.76M	}
90
91	586k	nrg_scale = ixheaac_norm32(nrg);
92
93	586k	if (nrg_scale > 0) {
94	586k	nrg_scale &= ~1;
95	586k	nrg = ixheaac_shl32_sat(nrg, nrg_scale);
96	586k	shift = shift - (nrg_scale >> 1);
97	586k	}
98
99	586k	nrg = ixheaacd_sqrt(nrg);
100	586k	scale = ixheaac_div32_pos_normb(scale, nrg);
101
102	586k	spec = ptr_spec_coef;
103
104	586k	if (shift < -31) {
105	21.0k	shift = -31;
106	21.0k	}
107	7.35M	for (sfb = 0; sfb <= sfb_width; sfb++) {
108	6.76M	spec = ixheaac_shr32_dir_sat_limit(ixheaac_mult32_shl_sat(spec, scale),
109	6.76M	shift);
110	6.76M	spec++;
111	6.76M	}
112	586k	}
113
114		VOID ixheaacd_pns_process(ia_aac_dec_channel_info_struct *ptr_aac_dec_channel_info[CHANNELS],
115	282k	WORD32 channel, ia_aac_dec_tables_struct *ptr_aac_tables) {
116	282k	ia_pns_info_struct *ptr_pns_info =
117	282k	&ptr_aac_dec_channel_info[channel]->str_pns_info;
118	282k	ia_ics_info_struct *ptr_ics_info =
119	282k	&ptr_aac_dec_channel_info[channel]->str_ics_info;
120	282k	WORD16 maximum_bins_short = ptr_ics_info->frame_length >> 3;
121	282k	WORD32 *ptr_scale_mant_tab =
122	282k	ptr_aac_tables->pstr_block_tables->scale_mant_tab;
123
124	282k	if (ptr_pns_info->pns_active) {
125	36.1k	const WORD16 *swb_offset =
126	36.1k	ptr_aac_tables->str_aac_sfb_info[ptr_ics_info->window_sequence]
127	36.1k	.sfb_index;
128
129	36.1k	WORD num_win_group, grp_len, sfb;
130	36.1k	WORD32 *spec = &ptr_aac_dec_channel_info[channel]->ptr_spec_coeff[0];
131
132	82.1k	for (num_win_group = 0; num_win_group < ptr_ics_info->num_window_groups;
133	45.9k	num_win_group++) {
134	45.9k	grp_len = ptr_ics_info->window_group_length[num_win_group];
135
136	45.9k	for (grp_len = 0;
137	132k	grp_len < ptr_ics_info->window_group_length[num_win_group];
138	86.2k	grp_len++) {
139	1.47M	for (sfb = 0; sfb < ptr_ics_info->max_sfb; sfb++) {
140	1.38M	WORD16 pns_band = ((num_win_group << 4) + sfb);
141
142	1.38M	if (ptr_aac_dec_channel_info[channel]
143	1.38M	->str_pns_info.pns_used[pns_band]) {
144	586k	WORD32 scale_mant;
145	586k	WORD32 scale_exp;
146	586k	WORD32 sfb_width = swb_offset[sfb + 1] - swb_offset[sfb] - 1;
147	586k	WORD32 *ptr_spec = &spec[swb_offset[sfb]];
148
149	586k	scale_mant = ptr_scale_mant_tab[ptr_aac_dec_channel_info[channel]
150	586k	->ptr_scale_factor[pns_band] &
151	586k	PNS_SCALE_MANT_TAB_MASK];
152	586k	scale_exp = add_d(sub_d(31, (ptr_aac_dec_channel_info[channel]
153	586k	->ptr_scale_factor[pns_band] >>
154	586k	PNS_SCALEFACTOR_SCALING)),
155	586k	PNS_SCALE_MANT_TAB_SCALING);
156
157	586k	if (ixheaacd_is_correlation(ptr_aac_dec_channel_info[LEFT],
158	586k	pns_band)) {
159	44.0k	if (channel == 0) {
160	26.1k	ptr_aac_dec_channel_info[LEFT]
161	26.1k	->pstr_pns_corr_info->random_vector[pns_band] =
162	26.1k	ptr_aac_dec_channel_info[LEFT]
163	26.1k	->pstr_pns_rand_vec_data->current_seed;
164
165	26.1k	ixheaacd_gen_rand_vec(
166	26.1k	scale_mant, scale_exp, ptr_spec, sfb_width,
167	26.1k	&(ptr_aac_dec_channel_info[LEFT]
168	26.1k	->pstr_pns_rand_vec_data->current_seed));
169	26.1k	}
170
171	17.8k	else {
172	17.8k	ixheaacd_gen_rand_vec(
173	17.8k	scale_mant, scale_exp, ptr_spec, sfb_width,
174	17.8k	&(ptr_aac_dec_channel_info[LEFT]
175	17.8k	->pstr_pns_corr_info->random_vector[pns_band]));
176	17.8k	}
177
178	44.0k	}
179
180	542k	else {
181	542k	ixheaacd_gen_rand_vec(
182	542k	scale_mant, scale_exp, ptr_spec, sfb_width,
183	542k	&(ptr_aac_dec_channel_info[LEFT]
184	542k	->pstr_pns_rand_vec_data->current_seed));
185	542k	}
186	586k	}
187	1.38M	}
188
189	86.2k	if (maximum_bins_short == 120)
190	30.3k	spec += maximum_bins_short;
191	55.8k	else
192	55.8k	spec += 128;
193	86.2k	}
194	45.9k	}
195	36.1k	}
196
197	282k	if (channel == 0) {
198	254k	ptr_aac_dec_channel_info[0]->pstr_pns_rand_vec_data->pns_frame_number++;
199	254k	}
200	282k	}
201
202		VOID ixheaacd_tns_decode_coef(const ia_filter_info_struct *filter,
203		WORD16 *parcor_coef,
204	49.2k	ia_aac_dec_tables_struct *ptr_aac_tables) {
205	49.2k	WORD order, resolution;
206	49.2k	WORD16 *ptr_par_coef = parcor_coef;
207	49.2k	WORD16 *tns_coeff_ptr;
208	49.2k	WORD8 ixheaacd_drc_offset = 4;
209	49.2k	WORD8 ptr_coef = (WORD8 )filter->coef;
210
211	49.2k	resolution = filter->resolution;
212	49.2k	tns_coeff_ptr = ptr_aac_tables->pstr_block_tables->tns_coeff3_16;
213
214	49.2k	if (resolution) {
215	29.0k	tns_coeff_ptr = ptr_aac_tables->pstr_block_tables->tns_coeff4_16;
216	29.0k	ixheaacd_drc_offset = ixheaacd_drc_offset << 1;
217	29.0k	}
218
219	331k	for (order = 0; order < filter->order; order++) {
220	281k	WORD8 temp = *ptr_coef++;
221	281k	*ptr_par_coef++ = tns_coeff_ptr[temp + ixheaacd_drc_offset];
222	281k	}
223	49.2k	}
224
225		VOID ixheaacd_tns_decode_coef_ld(const ia_filter_info_struct *filter,
226		WORD32 *parcor_coef,
227	0	ia_aac_dec_tables_struct *ptr_aac_tables) {
228	0	WORD order, resolution;
229	0	WORD32 *ptr_par_coef = parcor_coef;
230	0	WORD32 *tns_coeff_ptr;
231	0	WORD8 offset = 4;
232	0	WORD8 ptr_coef = (WORD8 )filter->coef;
233
234	0	resolution = filter->resolution;
235	0	tns_coeff_ptr = ptr_aac_tables->pstr_block_tables->tns_coeff3;
236
237	0	if (resolution) {
238	0	tns_coeff_ptr = ptr_aac_tables->pstr_block_tables->tns_coeff4;
239	0	offset = offset << 1;
240	0	}
241
242	0	for (order = 0; order < filter->order; order++) {
243	0	WORD8 temp = *ptr_coef++;
244	0	*ptr_par_coef++ = tns_coeff_ptr[temp + offset];
245	0	}
246	0	}
247
248		VOID ixheaacd_aac_tns_process(
249		ia_aac_dec_channel_info_struct *ptr_aac_dec_channel_info, WORD32 num_ch,
250		ia_aac_dec_tables_struct *ptr_aac_tables, WORD32 object_type,
251	92.0k	WORD32 ar_flag, WORD32 *predicted_spectrum) {
252	92.0k	WORD i;
253	92.0k	WORD16 scale_lpc;
254
255	92.0k	ia_tns_info_aac_struct *ptr_tns_info =
256	92.0k	&ptr_aac_dec_channel_info->str_tns_info;
257	92.0k	WORD32 *spec = ptr_aac_dec_channel_info->ptr_spec_coeff;
258	92.0k	WORD32 *scratch_buf = ptr_aac_dec_channel_info->scratch_buf_ptr;
259
260	92.0k	WORD win, filt, start, stop, size, scale_spec;
261	92.0k	ia_ics_info_struct *ptr_ics_info = &ptr_aac_dec_channel_info->str_ics_info;
262	92.0k	WORD num_window, tns_max_bands, win_seq;
263	92.0k	WORD16 maximum_bins_short = ptr_ics_info->frame_length >> 3;
264	92.0k	WORD position;
265
266	92.0k	WORD32 parcor_coef[MAX_ORDER + 1];
267	92.0k	WORD16 parcor_coef_16[MAX_ORDER + 1];
268
269	92.0k	WORD32 lpc_coef[MAX_ORDER + 1];
270	92.0k	WORD16 lpc_coef_16[MAX_ORDER + 1];
271
272	92.0k	const WORD16 *ptr_sfb_table;
273
274	92.0k	WORD16 max_bin_long = ptr_ics_info->frame_length;
275
276	92.0k	win_seq = ptr_ics_info->window_sequence == 0
277	92.0k	? 0
278	92.0k	: (ptr_ics_info->window_sequence % 2 == 0);
279
280	92.0k	if (ar_flag)
281	79.4k	spec = ptr_aac_dec_channel_info->ptr_spec_coeff;
282	12.6k	else {
283	12.6k	spec = predicted_spectrum;
284	12.6k	}
285
286	92.0k	if (object_type == AOT_ER_AAC_ELD \|\| object_type == AOT_ER_AAC_LD \|\|
287	49.3k	object_type == AOT_AAC_LTP) {
288	49.3k	if (512 == ptr_ics_info->frame_length) {
289	34.1k	tns_max_bands =
290	34.1k	ptr_aac_tables->pstr_block_tables
291	34.1k	->tns_max_bands_tbl_ld[ptr_ics_info->sampling_rate_index];
292	34.1k	win_seq = 1;
293	34.1k	num_window = win_seq;
294	34.1k	} else if (480 == ptr_ics_info->frame_length) {
295	7.44k	tns_max_bands =
296	7.44k	ptr_aac_tables->pstr_block_tables
297	7.44k	->tns_max_bands_tbl_480[ptr_ics_info->sampling_rate_index];
298	7.44k	win_seq = 1;
299	7.44k	num_window = win_seq;
300	7.78k	} else {
301	7.78k	tns_max_bands =
302	7.78k	ptr_aac_tables->pstr_block_tables
303	7.78k	->tns_max_bands_tbl[ptr_ics_info->sampling_rate_index][win_seq];
304
305	7.78k	num_window = win_seq ? 8 : 1;
306	7.78k	}
307	49.3k	} else {
308	42.7k	tns_max_bands =
309	42.7k	ptr_aac_tables->pstr_block_tables
310	42.7k	->tns_max_bands_tbl[ptr_ics_info->sampling_rate_index][win_seq];
311
312	42.7k	num_window = win_seq ? 8 : 1;
313	42.7k	}
314
315	92.0k	ptr_sfb_table =
316	92.0k	ptr_aac_tables->str_aac_sfb_info[ptr_ics_info->window_sequence].sfb_index;
317
318	273k	for (win = 0; win < num_window; win++) {
319	181k	WORD n_filt = ptr_tns_info->n_filt[win];
320
321	281k	for (filt = 0; filt < n_filt; filt++) {
322	100k	ia_filter_info_struct *filter = &ptr_tns_info->str_filter[win][filt];
323
324	100k	if (filter->order <= 0) {
325	16.7k	continue;
326	16.7k	}
327
328	83.3k	if ((object_type == AOT_ER_AAC_LD) \|\| (object_type == AOT_AAC_LTP) \|\|
329	49.4k	(num_ch > 2)) {
330	34.0k	ixheaacd_tns_decode_coefficients(filter, parcor_coef, ptr_aac_tables);
331
332	49.2k	} else {
333	49.2k	ixheaacd_tns_decode_coef(filter, parcor_coef_16, ptr_aac_tables);
334	49.2k	}
335
336	83.3k	start = ixheaac_min32(ixheaac_min32(filter->start_band, tns_max_bands),
337	83.3k	ptr_ics_info->max_sfb);
338
339	83.3k	start = ptr_sfb_table[start];
340
341	83.3k	stop = ixheaac_min32(ixheaac_min32(filter->stop_band, tns_max_bands),
342	83.3k	ptr_ics_info->max_sfb);
343
344	83.3k	stop = ptr_sfb_table[stop];
345
346	83.3k	size = (stop - start);
347
348	83.3k	if (size <= 0) {
349	15.8k	continue;
350	15.8k	}
351	67.4k	if ((object_type == AOT_ER_AAC_LD) \|\| (object_type == AOT_AAC_LTP) \|\|
352	39.0k	(num_ch > 2)) {
353	28.5k	ixheaacd_tns_parcor_to_lpc(parcor_coef, lpc_coef, &scale_lpc,
354	28.5k	filter->order);
355
356	38.8k	} else {
357	38.8k	(*ixheaacd_tns_parcor_lpc_convert)(parcor_coef_16, lpc_coef_16,
358	38.8k	&scale_lpc, filter->order);
359	38.8k	}
360
361	67.4k	{
362	67.4k	WORD32 *ptr_tmp;
363
364	67.4k	if (maximum_bins_short == 120)
365	19.1k	ptr_tmp = spec + (win * maximum_bins_short) + start;
366	48.2k	else
367	48.2k	ptr_tmp = spec + (win << 7) + start;
368
369	67.4k	scale_spec = (*ixheaacd_calc_max_spectral_line)(ptr_tmp, size);
370	67.4k	}
371
372	67.4k	if (filter->direction == -1) {
373	33.4k	position = stop - 1;
374
375	33.4k	if (maximum_bins_short == 120) {
376	13.8k	if (((win * maximum_bins_short) + position) < filter->order) continue;
377	19.6k	} else {
378	19.6k	if (((win << 7) + position) < filter->order) continue;
379	19.6k	}
380
381	34.0k	} else {
382	34.0k	position = start;
383	34.0k	if (maximum_bins_short == 120) {
384	5.39k	if ((((win * maximum_bins_short) + position) + filter->order) > max_bin_long)
385	0	continue;
386	28.6k	} else {
387	28.6k	if ((((win << 7) + position) + filter->order) > MAX_BINS_LONG) continue;
388	28.6k	}
389	34.0k	}
390
391	64.7k	if ((num_ch <= 2) &&
392	64.6k	((object_type != AOT_ER_AAC_LD) && (object_type != AOT_AAC_LTP)))
393	36.2k	scale_spec = ((scale_spec - 4) - scale_lpc);
394	28.5k	else {
395	28.5k	if (scale_spec > 17)
396	1.25k	scale_spec = ((scale_spec - 6) - scale_lpc);
397	27.3k	else if (scale_spec > 11)
398	364	scale_spec = ((scale_spec - 5) - scale_lpc);
399	26.9k	else
400	26.9k	scale_spec = ((scale_spec - 4) - scale_lpc);
401	28.5k	}
402
403	64.7k	if (scale_spec > 0) {
404	19.2k	scale_spec = ixheaac_min32(scale_spec, 31);
405
406	19.2k	if ((object_type == AOT_ER_AAC_LD) \|\| (object_type == AOT_AAC_LTP) \|\|
407	13.1k	(num_ch > 2)) {
408	6.16k	if (ar_flag)
409	5.15k	{
410	5.15k	if (maximum_bins_short == 120) {
411	277	(ixheaacd_tns_ar_filter_fixed)(&spec[(win maximum_bins_short) + position],
412	277	size, filter->direction,
413	277	(WORD32 *)lpc_coef, filter->order,
414	277	(WORD32)scale_lpc, scale_spec);
415	4.87k	} else {
416	4.87k	(*ixheaacd_tns_ar_filter_fixed)(&spec[(win << 7) + position], size,
417	4.87k	filter->direction,
418	4.87k	(WORD32 *)lpc_coef, filter->order,
419	4.87k	(WORD32)scale_lpc, scale_spec);
420	4.87k	}
421	5.15k	} else {
422	1.01k	if (maximum_bins_short == 120) {
423	16	ixheaacd_tns_ma_filter_fixed_ld(&spec[(win * maximum_bins_short) + position],
424	16	size, filter->direction, lpc_coef,
425	16	filter->order, scale_lpc);
426	997	} else {
427	997	ixheaacd_tns_ma_filter_fixed_ld(&spec[(win << 7) + position], size,
428	997	filter->direction, lpc_coef,
429	997	filter->order, scale_lpc);
430	997	}
431	1.01k	}
432	13.0k	} else {
433	13.0k	if (object_type == AOT_ER_AAC_ELD) scale_spec = scale_spec - 1;
434	13.0k	if (maximum_bins_short == 120) {
435	9.35k	(ixheaacd_tns_ar_filter)(&spec[(win maximum_bins_short) + position], size,
436	9.35k	filter->direction, lpc_coef_16,
437	9.35k	filter->order, (WORD32)scale_lpc,
438	9.35k	scale_spec, scratch_buf);
439	9.35k	} else {
440	3.69k	(*ixheaacd_tns_ar_filter)(&spec[(win << 7) + position], size,
441	3.69k	filter->direction, lpc_coef_16,
442	3.69k	filter->order, (WORD32)scale_lpc,
443	3.69k	scale_spec, scratch_buf);
444	3.69k	}
445	13.0k	}
446	19.2k	}
447
448	45.5k	else {
449	45.5k	WORD32 *ptr_tmp;
450
451	45.5k	if (maximum_bins_short == 120)
452	7.73k	ptr_tmp = spec + (win * maximum_bins_short) + start;
453	37.8k	else
454	37.8k	ptr_tmp = spec + (win >> 7) + start;
455
456	45.5k	scale_spec = -scale_spec;
457	45.5k	scale_spec = ixheaac_min32(scale_spec, 31);
458
459	6.51M	for (i = size; i != 0; i--) {
460	6.47M	ptr_tmp = (ptr_tmp >> scale_spec);
461	6.47M	ptr_tmp++;
462	6.47M	}
463
464	45.5k	if ((object_type == AOT_ER_AAC_LD) \|\| (object_type == AOT_AAC_LTP) \|\|
465	23.2k	num_ch > 2) {
466	22.4k	if (ar_flag) {
467	9.38k	if (maximum_bins_short == 120) {
468	87	(*ixheaacd_tns_ar_filter_fixed)(
469	87	&spec[(win * maximum_bins_short) + position], size, filter->direction,
470	87	(WORD32 *)lpc_coef, filter->order, scale_lpc, 0);
471	9.29k	} else {
472	9.29k	(*ixheaacd_tns_ar_filter_fixed)(
473	9.29k	&spec[(win << 7) + position], size, filter->direction,
474	9.29k	(WORD32 *)lpc_coef, filter->order, scale_lpc, 0);
475	9.29k	}
476	13.0k	} else {
477	13.0k	if (maximum_bins_short == 120) {
478	12	ixheaacd_tns_ma_filter_fixed_ld(&spec[(win * maximum_bins_short) + position],
479	12	size, filter->direction, lpc_coef,
480	12	filter->order, scale_lpc);
481	13.0k	} else {
482	13.0k	ixheaacd_tns_ma_filter_fixed_ld(&spec[(win << 7) + position], size,
483	13.0k	filter->direction, lpc_coef,
484	13.0k	filter->order, scale_lpc);
485	13.0k	}
486	13.0k	}
487	23.1k	} else {
488	23.1k	if (object_type == AOT_ER_AAC_ELD) {
489	4.02k	scale_lpc = scale_lpc - 1;
490	4.02k	}
491
492	23.1k	if (maximum_bins_short == 120) {
493	7.63k	(ixheaacd_tns_ar_filter)(&spec[(win maximum_bins_short) + position], size,
494	7.63k	filter->direction, lpc_coef_16,
495	7.63k	filter->order, scale_lpc, 0, scratch_buf);
496	15.5k	} else {
497	15.5k	(*ixheaacd_tns_ar_filter)(&spec[(win << 7) + position], size,
498	15.5k	filter->direction, lpc_coef_16,
499	15.5k	filter->order, scale_lpc, 0, scratch_buf);
500	15.5k	}
501	23.1k	}
502
503	45.5k	if (maximum_bins_short == 120)
504	7.73k	ptr_tmp = spec + (win * maximum_bins_short) + start;
505	37.8k	else
506	37.8k	ptr_tmp = spec + (win << 7) + start;
507
508	6.51M	for (i = size; i != 0; i--) {
509	6.47M	ptr_tmp = (ptr_tmp << scale_spec);
510	6.47M	ptr_tmp++;
511	6.47M	}
512	45.5k	}
513	64.7k	}
514	181k	}
515	92.0k	}