libxaac/decoder/drc_src/impd_drc_loud_eq.c

/******************************************************************************
 *
 * Copyright (C) 2015 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_uni_tables.h"
#include "impd_drc_uni_common.h"
#include "impd_drc_uni_interface.h"
#include "impd_drc_struct.h"
#include "impd_drc_uni_gain_dec.h"
#include "impd_drc_uni_loud_eq.h"
#include "impd_parametric_drc_dec.h"
#include "impd_drc_uni_multi_band.h"
#include "impd_drc_filter_bank.h"
#include "impd_drc_uni_process_audio.h"
#include "impd_drc_rom.h"

WORD32 impd_parametric_drc_instance_reset(
    WORD32 instance_idx, ia_parametric_drc_instance_params_struct*
                             pstr_parametric_drc_instance_params) {
  WORD32 err = 0;

  if (pstr_parametric_drc_instance_params->parametric_drc_type ==
      PARAM_DRC_TYPE_FF) {
    ia_parametric_drc_type_ff_params_struct*
        pstr_parametric_ffwd_type_drc_params =
            &(pstr_parametric_drc_instance_params
                  ->str_parametric_drc_type_ff_params);
    err = impd_parametric_ffwd_type_drc_reset(
        pstr_parametric_ffwd_type_drc_params);
    if (err) return (err);

  } else {
    return (UNEXPECTED_ERROR);
  }

  return 0;
}

WORD32 impd_add_drc_band_audio(
    ia_drc_instructions_struct* pstr_drc_instruction_arr,
    const WORD32 drc_instructions_index,
    ia_drc_params_struct* ia_drc_params_struct,
    ia_audio_band_buffer_struct* audio_band_buffer, FLOAT32* audio_io_buf[]) {
  WORD32 g, b, i, c;
  FLOAT32 sum;
  WORD32 signalIndex = 0;
  FLOAT32** drcBandAudio;
  FLOAT32** channel_audio;
  ia_drc_instructions_struct* str_drc_instruction_str;

  drcBandAudio = audio_band_buffer->non_interleaved_audio;
  channel_audio = audio_io_buf;

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

  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 += drcBandAudio[signalIndex + b][i];
          }

          channel_audio[c][i] = sum;
        }
        signalIndex += str_drc_instruction_str->band_count_of_ch_group[g];
      } else {
        signalIndex++;
      }
    }
  } 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] = drcBandAudio[c][i];
      }
    }
  }
  return (0);
}

WORD32 removeTables(void) { return (0); }

const ia_slope_code_table_struct* impd_get_slope_code_tbl_by_value(void) {
  return (&(slopeCodeTableEntryByValue[0]));
}

FLOAT32 impd_decode_slope_idx(const WORD32 slopeCodeIndex) {
  const ia_slope_code_table_struct* slopeCodeTable =
      impd_get_slope_code_tbl_by_value();
  return slopeCodeTable[slopeCodeIndex].value;
}

FLOAT32 impd_decode_slope_idx_magnitude(const WORD32 slopeCodeIndex) {
  const ia_slope_code_table_struct* slopeCodeTable =
      impd_get_slope_code_tbl_by_value();
  return (FLOAT32)fabs((FLOAT64)slopeCodeTable[slopeCodeIndex].value);
}

WORD32 impd_get_multi_band_drc_present(ia_drc_config* pstr_drc_config,
                                       WORD32 numSets[3],
                                       WORD32 multiBandDrcPresent[3]) {
  WORD32 err = 0, k, m;
  for (k = 0; k < pstr_drc_config->drc_instructions_uni_drc_count; k++) {
    if ((pstr_drc_config->str_drc_instruction_str[k].downmix_id[0] ==
         ID_FOR_BASE_LAYOUT) ||
        (pstr_drc_config->str_drc_instruction_str[k].drc_apply_to_dwnmix ==
         0)) {
      numSets[0]++;
    } else if (pstr_drc_config->str_drc_instruction_str[k].downmix_id[0] ==
               ID_FOR_ANY_DOWNMIX) {
      numSets[1]++;
    } else {
      numSets[2]++;
    }
    for (m = 0;
         m < pstr_drc_config->str_drc_instruction_str[k].num_drc_ch_groups;
         m++) {
      if (pstr_drc_config->str_p_loc_drc_coefficients_uni_drc[0]
              .gain_set_params[pstr_drc_config->str_drc_instruction_str
                                   ->gain_set_index_for_channel_group[m]]
              .band_count > 1) {
        if ((pstr_drc_config->str_drc_instruction_str[k].downmix_id[0] ==
             ID_FOR_BASE_LAYOUT) ||
            (pstr_drc_config->str_drc_instruction_str[k].drc_apply_to_dwnmix ==
             0)) {
          multiBandDrcPresent[0] = 1;
        } else if (pstr_drc_config->str_drc_instruction_str[k].downmix_id[0] ==
                   ID_FOR_ANY_DOWNMIX) {
          multiBandDrcPresent[1] = 1;
        } else {
          multiBandDrcPresent[2] = 1;
        }
      }
    }
  }
  return err;
}