/src/libxaac/decoder/drc_src/impd_drc_process.c

Source (jump to first uncovered line)
/******************************************************************************
 *
 * 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 <stdlib.h>
#include <math.h>
#include <string.h>

#include "impd_type_def.h"
#include "impd_drc_extr_delta_coded_info.h"
#include "impd_drc_common.h"
#include "impd_drc_struct.h"
#include "impd_drc_filter_bank.h"
#include "impd_drc_multi_band.h"
#include "impd_drc_gain_dec.h"
#include "impd_drc_process_audio.h"

VOID impd_apply_gains_and_add(
    ia_drc_instructions_struct* pstr_drc_instruction_arr,
    const WORD32 drc_instructions_index,
    ia_drc_params_struct* ia_drc_params_struct,
    ia_gain_buffer_struct* pstr_gain_buf,
    shape_filter_block shape_filter_block[], FLOAT32* deinterleaved_audio[],

    FLOAT32* channel_audio[], WORD32 impd_apply_gains) {
  WORD32 c, b, g, i;
  WORD32 offset = 0, signal_index = 0;
  WORD32 gain_index_for_group[CHANNEL_GROUP_COUNT_MAX];
  WORD32 signal_index_for_channel[MAX_CHANNEL_COUNT];
  FLOAT32* lpcm_gains;
  FLOAT32 sum;
  FLOAT32 drc_gain_last = 0, gain_thr;
  WORD32 i_end, i_start;
  ia_drc_instructions_struct* str_drc_instruction_str =
      &(pstr_drc_instruction_arr[drc_instructions_index]);

  if (drc_instructions_index >= 0) {
    str_drc_instruction_str =
        &(pstr_drc_instruction_arr[drc_instructions_index]);
    {
      if (str_drc_instruction_str->drc_set_id > 0) {
        if (ia_drc_params_struct->delay_mode == DELAY_MODE_LOW_DELAY) {
          offset = ia_drc_params_struct->drc_frame_size;
        }
        gain_index_for_group[0] = 0;
        for (g = 0; g < str_drc_instruction_str->num_drc_ch_groups - 1; g++) {
          gain_index_for_group[g + 1] =
              gain_index_for_group[g] +
              str_drc_instruction_str->band_count_of_ch_group[g];
        }
        signal_index_for_channel[0] = 0;
        for (c = 0; c < str_drc_instruction_str->audio_num_chan - 1; c++) {
          if (str_drc_instruction_str->channel_group_of_ch[c] >= 0) {
            signal_index_for_channel[c + 1] =
                signal_index_for_channel[c] +
                str_drc_instruction_str->band_count_of_ch_group
                    [str_drc_instruction_str->channel_group_of_ch[c]];
          } else {
            signal_index_for_channel[c + 1] = signal_index_for_channel[c] + 1;
          }
        }

        for (g = 0; g < str_drc_instruction_str->num_drc_ch_groups; g++) {
          for (b = 0; b < str_drc_instruction_str->band_count_of_ch_group[g];
               b++) {
            if (str_drc_instruction_str->ch_group_parametric_drc_flag[g] == 0) {
              lpcm_gains =
                  pstr_gain_buf->buf_interpolation[gain_index_for_group[g] + b]
                      .lpcm_gains +
                  MAX_SIGNAL_DELAY - ia_drc_params_struct->gain_delay_samples -
                  ia_drc_params_struct->audio_delay_samples + offset;
            } else {
              lpcm_gains =
                  pstr_gain_buf->buf_interpolation[gain_index_for_group[g] + b]
                      .lpcm_gains +
                  MAX_SIGNAL_DELAY +
                  str_drc_instruction_str
                      ->parametric_drc_look_ahead_samples[g] -
                  ia_drc_params_struct->audio_delay_samples;
            }
            i_end = 0;
            i_start = 0;
            while (i_end < ia_drc_params_struct->drc_frame_size) {
              if (shape_filter_block[g].shape_flter_block_flag) {
                drc_gain_last = shape_filter_block[g].drc_gain_last;
                gain_thr = 0.0001f * drc_gain_last;
                while ((i_end < ia_drc_params_struct->drc_frame_size) &&
                       (fabs(lpcm_gains[i_end] - drc_gain_last) <= gain_thr))
                  i_end++;
              } else {
                i_end = ia_drc_params_struct->drc_frame_size;
              }

              for (c = 0; c < str_drc_instruction_str->audio_num_chan; c++)

              {
                if (g == str_drc_instruction_str->channel_group_of_ch[c]) {
                  signal_index = signal_index_for_channel[c] + b;

                  if (impd_apply_gains == 1) {
                    impd_shape_filt_block_time_process(
                        &shape_filter_block[g], &lpcm_gains[0], signal_index,
                        &deinterleaved_audio[signal_index][0], i_start, i_end);

                  } else {
                    for (i = i_start; i < i_end; i++) {
                      deinterleaved_audio[signal_index][i] = lpcm_gains[i];
                    }
                  }
                }
              }
              if ((i_end < ia_drc_params_struct->drc_frame_size) &&
                  (shape_filter_block[g].shape_flter_block_flag)) {
                impd_shape_filt_block_adapt(lpcm_gains[i_end],
                                            &shape_filter_block[g]);
              }
              if ((i_end == i_start) &&
                  (drc_gain_last == shape_filter_block[g].drc_gain_last))
                break;
              i_start = i_end;
            }
          }
        }
      }
    }
  }

  signal_index = 0;

  if (str_drc_instruction_str->drc_set_id > 0) {
    for (c = 0; c < str_drc_instruction_str->audio_num_chan; c++)

    {
      g = str_drc_instruction_str->channel_group_of_ch[c];
      if (g >= 0) {
        for (i = 0; i < ia_drc_params_struct->drc_frame_size; i++) {
          sum = 0.0f;
          for (b = 0; b < str_drc_instruction_str->band_count_of_ch_group[g];
               b++) {
            sum += deinterleaved_audio[signal_index + b][i];
          }

          channel_audio[c][i] = sum;
        }
        signal_index += str_drc_instruction_str->band_count_of_ch_group[g];
      } else {
        for (i = 0; i < ia_drc_params_struct->drc_frame_size; i++) {
          channel_audio[c][i] = deinterleaved_audio[signal_index][i];
        }
        signal_index++;
      }
    }
  } else {
    for (c = 0; c < str_drc_instruction_str->audio_num_chan; c++)

    {
      for (i = 0; i < ia_drc_params_struct->drc_frame_size; i++) {
        channel_audio[c][i] = deinterleaved_audio[c][i];
      }
    }
  }

  return;
}

WORD32
impd_filter_banks_process(ia_drc_instructions_struct* pstr_drc_instruction_arr,
                          const WORD32 drc_instructions_index,
                          ia_drc_params_struct* ia_drc_params_struct,
                          FLOAT32* audio_io_buf[],
                          ia_audio_band_buffer_struct* audio_band_buffer,
                          ia_filter_banks_struct* ia_filter_banks_struct,
                          const WORD32 passThru) {
  WORD32 c, g, e, i, num_bands;
  // WORD32 err = 0;
  FLOAT32* audio_in;
  FLOAT32** audio_out;
  ia_drc_filter_bank_struct* str_drc_filter_bank;
  ia_drc_instructions_struct* str_drc_instruction_str;
  WORD32 drc_frame_size = ia_drc_params_struct->drc_frame_size;

  if (drc_instructions_index >= 0) {
    str_drc_instruction_str =
        &(pstr_drc_instruction_arr[drc_instructions_index]);
  } else {
    return -1;
  }

  e = 0;

  for (c = 0; c < str_drc_instruction_str->audio_num_chan; c++)

  {
    str_drc_filter_bank = NULL;

    audio_in = audio_io_buf[c];

    audio_out = &(audio_band_buffer->non_interleaved_audio[e]);
    if ((passThru == 0) && (drc_instructions_index >= 0)) {
      if (str_drc_instruction_str->drc_set_id < 0) {
        num_bands = 1;
      } else {
        g = str_drc_instruction_str->channel_group_of_ch[c];
        if (g == -1) {
          num_bands = 1;
          // if (ia_filter_banks_struct->str_drc_filter_bank != NULL)
          //{
          str_drc_filter_bank =
              &(ia_filter_banks_struct->str_drc_filter_bank
                    [str_drc_instruction_str->num_drc_ch_groups]);
          //}
        } else {
          num_bands = str_drc_instruction_str->band_count_of_ch_group[g];
          // if (ia_filter_banks_struct->str_drc_filter_bank != NULL)
          //{
          str_drc_filter_bank =
              &(ia_filter_banks_struct->str_drc_filter_bank[g]);
          //}
        }
        // if (ia_filter_banks_struct->str_drc_filter_bank != NULL)
        //{
        // if (&str_drc_filter_bank->str_all_pass_cascade != NULL)
        //{
        impd_all_pass_cascade_process(
            &str_drc_filter_bank->str_all_pass_cascade, c, drc_frame_size,
            audio_in);
        //}
        //}
      }
    } else {
      num_bands = 1;
    }
    switch (num_bands) {
      case 1:
        for (i = 0; i < drc_frame_size; i++) {
          audio_out[0][i] = audio_in[i];
        }
        e++;
        break;
      case 2:
        impd_two_band_filter_process(&str_drc_filter_bank->str_two_band_bank, c,
                                     drc_frame_size, audio_in, audio_out);
        e += 2;
        break;
      case 3:
        impd_three_band_filter_process(
            &str_drc_filter_bank->str_three_band_bank, c, drc_frame_size,
            audio_in, audio_out);
        e += 3;
        break;
      case 4:
        impd_four_band_filter_process(&str_drc_filter_bank->str_four_band_bank,
                                      c, drc_frame_size, audio_in, audio_out);
        e += 4;
        break;
      default:
        return (PARAM_ERROR);
        break;
    }
  }

  return (0);
}

VOID impd_store_audio_io_buffer_time(
    FLOAT32* audio_in_out_buf[], ia_audio_in_out_buf* audio_io_buf_internal) {
  WORD32 i, j;

  if (audio_io_buf_internal->audio_delay_samples) {
    for (i = 0; i < audio_io_buf_internal->audio_num_chan; i++) {
      for (j = 0; j < audio_io_buf_internal->frame_size; j++) {
        audio_io_buf_internal->audio_io_buffer_delayed
            [i][audio_io_buf_internal->audio_delay_samples + j] =
            audio_in_out_buf[i][j];
      }
    }
  } else {
    audio_io_buf_internal->audio_io_buffer_delayed = audio_in_out_buf;
    audio_io_buf_internal->audio_in_out_buf = audio_in_out_buf;
  }

  return;
}

VOID impd_retrieve_audio_io_buffer_time(
    FLOAT32* audio_in_out_buf[], ia_audio_in_out_buf* audio_io_buf_internal) {
  WORD32 i, j;

  if (audio_io_buf_internal->audio_delay_samples) {
    for (i = 0; i < audio_io_buf_internal->audio_num_chan; i++) {
      for (j = 0; j < audio_io_buf_internal->frame_size; j++) {
        audio_in_out_buf[i][j] =
            audio_io_buf_internal->audio_io_buffer_delayed[i][j];
      }
    }
  }

  return;
}

VOID impd_advance_audio_io_buffer_time(
    ia_audio_in_out_buf* audio_io_buf_internal) {
  WORD32 i;
  if (audio_io_buf_internal->audio_delay_samples) {
    for (i = 0; i < audio_io_buf_internal->audio_num_chan; i++) {
      memmove(
          audio_io_buf_internal->audio_io_buffer_delayed[i],
          &audio_io_buf_internal
               ->audio_io_buffer_delayed[i][audio_io_buf_internal->frame_size],
          sizeof(FLOAT32) * audio_io_buf_internal->audio_delay_samples);
    }
  }

  return;
}

Coverage Report

Created: 2025-08-03 06:57

Line	Count	Source (jump to first uncovered line)
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 <stdio.h>
21		#include <stdlib.h>
22		#include <math.h>
23		#include <string.h>
24
25		#include "impd_type_def.h"
26		#include "impd_drc_extr_delta_coded_info.h"
27		#include "impd_drc_common.h"
28		#include "impd_drc_struct.h"
29		#include "impd_drc_filter_bank.h"
30		#include "impd_drc_multi_band.h"
31		#include "impd_drc_gain_dec.h"
32		#include "impd_drc_process_audio.h"
33
34		VOID impd_apply_gains_and_add(
35		ia_drc_instructions_struct* pstr_drc_instruction_arr,
36		const WORD32 drc_instructions_index,
37		ia_drc_params_struct* ia_drc_params_struct,
38		ia_gain_buffer_struct* pstr_gain_buf,
39		shape_filter_block shape_filter_block[], FLOAT32* deinterleaved_audio[],
40
41	4.01k	FLOAT32* channel_audio[], WORD32 impd_apply_gains) {
42	4.01k	WORD32 c, b, g, i;
43	4.01k	WORD32 offset = 0, signal_index = 0;
44	4.01k	WORD32 gain_index_for_group[CHANNEL_GROUP_COUNT_MAX];
45	4.01k	WORD32 signal_index_for_channel[MAX_CHANNEL_COUNT];
46	4.01k	FLOAT32* lpcm_gains;
47	4.01k	FLOAT32 sum;
48	4.01k	FLOAT32 drc_gain_last = 0, gain_thr;
49	4.01k	WORD32 i_end, i_start;
50	4.01k	ia_drc_instructions_struct* str_drc_instruction_str =
51	4.01k	&(pstr_drc_instruction_arr[drc_instructions_index]);
52
53	4.01k	if (drc_instructions_index >= 0) {
54	4.01k	str_drc_instruction_str =
55	4.01k	&(pstr_drc_instruction_arr[drc_instructions_index]);
56	4.01k	{
57	4.01k	if (str_drc_instruction_str->drc_set_id > 0) {
58	4.01k	if (ia_drc_params_struct->delay_mode == DELAY_MODE_LOW_DELAY) {
59	0	offset = ia_drc_params_struct->drc_frame_size;
60	0	}
61	4.01k	gain_index_for_group[0] = 0;
62	8.03k	for (g = 0; g < str_drc_instruction_str->num_drc_ch_groups - 1; g++) {
63	4.01k	gain_index_for_group[g + 1] =
64	4.01k	gain_index_for_group[g] +
65	4.01k	str_drc_instruction_str->band_count_of_ch_group[g];
66	4.01k	}
67	4.01k	signal_index_for_channel[0] = 0;
68	6.32k	for (c = 0; c < str_drc_instruction_str->audio_num_chan - 1; c++) {
69	2.31k	if (str_drc_instruction_str->channel_group_of_ch[c] >= 0) {
70	2.31k	signal_index_for_channel[c + 1] =
71	2.31k	signal_index_for_channel[c] +
72	2.31k	str_drc_instruction_str->band_count_of_ch_group
73	2.31k	[str_drc_instruction_str->channel_group_of_ch[c]];
74	2.31k	} else {
75	0	signal_index_for_channel[c + 1] = signal_index_for_channel[c] + 1;
76	0	}
77	2.31k	}
78
79	12.0k	for (g = 0; g < str_drc_instruction_str->num_drc_ch_groups; g++) {
80	16.0k	for (b = 0; b < str_drc_instruction_str->band_count_of_ch_group[g];
81	8.03k	b++) {
82	8.03k	if (str_drc_instruction_str->ch_group_parametric_drc_flag[g] == 0) {
83	8.03k	lpcm_gains =
84	8.03k	pstr_gain_buf->buf_interpolation[gain_index_for_group[g] + b]
85	8.03k	.lpcm_gains +
86	8.03k	MAX_SIGNAL_DELAY - ia_drc_params_struct->gain_delay_samples -
87	8.03k	ia_drc_params_struct->audio_delay_samples + offset;
88	8.03k	} else {
89	0	lpcm_gains =
90	0	pstr_gain_buf->buf_interpolation[gain_index_for_group[g] + b]
91	0	.lpcm_gains +
92	0	MAX_SIGNAL_DELAY +
93	0	str_drc_instruction_str
94	0	->parametric_drc_look_ahead_samples[g] -
95	0	ia_drc_params_struct->audio_delay_samples;
96	0	}
97	8.03k	i_end = 0;
98	8.03k	i_start = 0;
99	16.0k	while (i_end < ia_drc_params_struct->drc_frame_size) {
100	8.03k	if (shape_filter_block[g].shape_flter_block_flag) {
101	0	drc_gain_last = shape_filter_block[g].drc_gain_last;
102	0	gain_thr = 0.0001f * drc_gain_last;
103	0	while ((i_end < ia_drc_params_struct->drc_frame_size) &&
104	0	(fabs(lpcm_gains[i_end] - drc_gain_last) <= gain_thr))
105	0	i_end++;
106	8.03k	} else {
107	8.03k	i_end = ia_drc_params_struct->drc_frame_size;
108	8.03k	}
109
110	20.6k	for (c = 0; c < str_drc_instruction_str->audio_num_chan; c++)
111
112	12.6k	{
113	12.6k	if (g == str_drc_instruction_str->channel_group_of_ch[c]) {
114	6.32k	signal_index = signal_index_for_channel[c] + b;
115
116	6.32k	if (impd_apply_gains == 1) {
117	6.32k	impd_shape_filt_block_time_process(
118	6.32k	&shape_filter_block[g], &lpcm_gains[0], signal_index,
119	6.32k	&deinterleaved_audio[signal_index][0], i_start, i_end);
120
121	6.32k	} else {
122	0	for (i = i_start; i < i_end; i++) {
123	0	deinterleaved_audio[signal_index][i] = lpcm_gains[i];
124	0	}
125	0	}
126	6.32k	}
127	12.6k	}
128	8.03k	if ((i_end < ia_drc_params_struct->drc_frame_size) &&
129	8.03k	(shape_filter_block[g].shape_flter_block_flag)) {
130	0	impd_shape_filt_block_adapt(lpcm_gains[i_end],
131	0	&shape_filter_block[g]);
132	0	}
133	8.03k	if ((i_end == i_start) &&
134	8.03k	(drc_gain_last == shape_filter_block[g].drc_gain_last))
135	0	break;
136	8.03k	i_start = i_end;
137	8.03k	}
138	8.03k	}
139	8.03k	}
140	4.01k	}
141	4.01k	}
142	4.01k	}
143
144	4.01k	signal_index = 0;
145
146	4.01k	if (str_drc_instruction_str->drc_set_id > 0) {
147	10.3k	for (c = 0; c < str_drc_instruction_str->audio_num_chan; c++)
148
149	6.32k	{
150	6.32k	g = str_drc_instruction_str->channel_group_of_ch[c];
151	6.32k	if (g >= 0) {
152	14.2M	for (i = 0; i < ia_drc_params_struct->drc_frame_size; i++) {
153	14.2M	sum = 0.0f;
154	28.5M	for (b = 0; b < str_drc_instruction_str->band_count_of_ch_group[g];
155	14.2M	b++) {
156	14.2M	sum += deinterleaved_audio[signal_index + b][i];
157	14.2M	}
158
159	14.2M	channel_audio[c][i] = sum;
160	14.2M	}
161	6.32k	signal_index += str_drc_instruction_str->band_count_of_ch_group[g];
162	6.32k	} else {
163	0	for (i = 0; i < ia_drc_params_struct->drc_frame_size; i++) {
164	0	channel_audio[c][i] = deinterleaved_audio[signal_index][i];
165	0	}
166	0	signal_index++;
167	0	}
168	6.32k	}
169	4.01k	} else {
170	0	for (c = 0; c < str_drc_instruction_str->audio_num_chan; c++)
171
172	0	{
173	0	for (i = 0; i < ia_drc_params_struct->drc_frame_size; i++) {
174	0	channel_audio[c][i] = deinterleaved_audio[c][i];
175	0	}
176	0	}
177	0	}
178
179	4.01k	return;
180	4.01k	}
181
182		WORD32
183		impd_filter_banks_process(ia_drc_instructions_struct* pstr_drc_instruction_arr,
184		const WORD32 drc_instructions_index,
185		ia_drc_params_struct* ia_drc_params_struct,
186		FLOAT32* audio_io_buf[],
187		ia_audio_band_buffer_struct* audio_band_buffer,
188		ia_filter_banks_struct* ia_filter_banks_struct,
189	4.01k	const WORD32 passThru) {
190	4.01k	WORD32 c, g, e, i, num_bands;
191		// WORD32 err = 0;
192	4.01k	FLOAT32* audio_in;
193	4.01k	FLOAT32** audio_out;
194	4.01k	ia_drc_filter_bank_struct* str_drc_filter_bank;
195	4.01k	ia_drc_instructions_struct* str_drc_instruction_str;
196	4.01k	WORD32 drc_frame_size = ia_drc_params_struct->drc_frame_size;
197
198	4.01k	if (drc_instructions_index >= 0) {
199	4.01k	str_drc_instruction_str =
200	4.01k	&(pstr_drc_instruction_arr[drc_instructions_index]);
201	4.01k	} else {
202	0	return -1;
203	0	}
204
205	4.01k	e = 0;
206
207	10.3k	for (c = 0; c < str_drc_instruction_str->audio_num_chan; c++)
208
209	6.32k	{
210	6.32k	str_drc_filter_bank = NULL;
211
212	6.32k	audio_in = audio_io_buf[c];
213
214	6.32k	audio_out = &(audio_band_buffer->non_interleaved_audio[e]);
215	6.32k	if ((passThru == 0) && (drc_instructions_index >= 0)) {
216	0	if (str_drc_instruction_str->drc_set_id < 0) {
217	0	num_bands = 1;
218	0	} else {
219	0	g = str_drc_instruction_str->channel_group_of_ch[c];
220	0	if (g == -1) {
221	0	num_bands = 1;
222		// if (ia_filter_banks_struct->str_drc_filter_bank != NULL)
223		//{
224	0	str_drc_filter_bank =
225	0	&(ia_filter_banks_struct->str_drc_filter_bank
226	0	[str_drc_instruction_str->num_drc_ch_groups]);
227		//}
228	0	} else {
229	0	num_bands = str_drc_instruction_str->band_count_of_ch_group[g];
230		// if (ia_filter_banks_struct->str_drc_filter_bank != NULL)
231		//{
232	0	str_drc_filter_bank =
233	0	&(ia_filter_banks_struct->str_drc_filter_bank[g]);
234		//}
235	0	}
236		// if (ia_filter_banks_struct->str_drc_filter_bank != NULL)
237		//{
238		// if (&str_drc_filter_bank->str_all_pass_cascade != NULL)
239		//{
240	0	impd_all_pass_cascade_process(
241	0	&str_drc_filter_bank->str_all_pass_cascade, c, drc_frame_size,
242	0	audio_in);
243		//}
244		//}
245	0	}
246	6.32k	} else {
247	6.32k	num_bands = 1;
248	6.32k	}
249	6.32k	switch (num_bands) {
250	6.32k	case 1:
251	14.2M	for (i = 0; i < drc_frame_size; i++) {
252	14.2M	audio_out[0][i] = audio_in[i];
253	14.2M	}
254	6.32k	e++;
255	6.32k	break;
256	0	case 2:
257	0	impd_two_band_filter_process(&str_drc_filter_bank->str_two_band_bank, c,
258	0	drc_frame_size, audio_in, audio_out);
259	0	e += 2;
260	0	break;
261	0	case 3:
262	0	impd_three_band_filter_process(
263	0	&str_drc_filter_bank->str_three_band_bank, c, drc_frame_size,
264	0	audio_in, audio_out);
265	0	e += 3;
266	0	break;
267	0	case 4:
268	0	impd_four_band_filter_process(&str_drc_filter_bank->str_four_band_bank,
269	0	c, drc_frame_size, audio_in, audio_out);
270	0	e += 4;
271	0	break;
272	0	default:
273	0	return (PARAM_ERROR);
274	0	break;
275	6.32k	}
276	6.32k	}
277
278	4.01k	return (0);
279	4.01k	}
280
281		VOID impd_store_audio_io_buffer_time(
282	41.5k	FLOAT32* audio_in_out_buf[], ia_audio_in_out_buf* audio_io_buf_internal) {
283	41.5k	WORD32 i, j;
284
285	41.5k	if (audio_io_buf_internal->audio_delay_samples) {
286	0	for (i = 0; i < audio_io_buf_internal->audio_num_chan; i++) {
287	0	for (j = 0; j < audio_io_buf_internal->frame_size; j++) {
288	0	audio_io_buf_internal->audio_io_buffer_delayed
289	0	[i][audio_io_buf_internal->audio_delay_samples + j] =
290	0	audio_in_out_buf[i][j];
291	0	}
292	0	}
293	41.5k	} else {
294	41.5k	audio_io_buf_internal->audio_io_buffer_delayed = audio_in_out_buf;
295	41.5k	audio_io_buf_internal->audio_in_out_buf = audio_in_out_buf;
296	41.5k	}
297
298	41.5k	return;
299	41.5k	}
300
301		VOID impd_retrieve_audio_io_buffer_time(
302	13.9k	FLOAT32* audio_in_out_buf[], ia_audio_in_out_buf* audio_io_buf_internal) {
303	13.9k	WORD32 i, j;
304
305	13.9k	if (audio_io_buf_internal->audio_delay_samples) {
306	0	for (i = 0; i < audio_io_buf_internal->audio_num_chan; i++) {
307	0	for (j = 0; j < audio_io_buf_internal->frame_size; j++) {
308	0	audio_in_out_buf[i][j] =
309	0	audio_io_buf_internal->audio_io_buffer_delayed[i][j];
310	0	}
311	0	}
312	0	}
313
314	13.9k	return;
315	13.9k	}
316
317		VOID impd_advance_audio_io_buffer_time(
318	39.8k	ia_audio_in_out_buf* audio_io_buf_internal) {
319	39.8k	WORD32 i;
320	39.8k	if (audio_io_buf_internal->audio_delay_samples) {
321	0	for (i = 0; i < audio_io_buf_internal->audio_num_chan; i++) {
322	0	memmove(
323	0	audio_io_buf_internal->audio_io_buffer_delayed[i],
324	0	&audio_io_buf_internal
325	0	->audio_io_buffer_delayed[i][audio_io_buf_internal->frame_size],
326	0	sizeof(FLOAT32) * audio_io_buf_internal->audio_delay_samples);
327	0	}
328	0	}
329
330	39.8k	return;
331	39.8k	}