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/******************************************************************************
*
* 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 <assert.h>
#include <string.h>
#include "impd_type_def.h"
#include "impd_drc_bitbuffer.h"
#include "impd_drc_extr_delta_coded_info.h"
#include "impd_drc_common.h"
#include "impd_drc_struct.h"
#include "impd_drc_parser.h"
WORD32 impd_read_bits_buf(ia_bit_buf_struct* it_bit_buff, WORD no_of_bits) {
UWORD32 ret_val;
UWORD8* ptr_read_next = it_bit_buff->ptr_read_next;
WORD bit_pos = it_bit_buff->bit_pos;
if (it_bit_buff->cnt_bits <= 0) {
it_bit_buff->error = 1;
return -1;
}
if (no_of_bits == 0) {
return 0;
}
it_bit_buff->cnt_bits -= no_of_bits;
ret_val = (UWORD32)*ptr_read_next;
bit_pos -= no_of_bits;
while (bit_pos < 0) {
bit_pos += 8;
ptr_read_next++;
if (ptr_read_next > it_bit_buff->ptr_bit_buf_end) {
ptr_read_next = it_bit_buff->ptr_bit_buf_base;
}
ret_val <<= 8;
ret_val |= (UWORD32)*ptr_read_next;
}
ret_val = ret_val << ((31 - no_of_bits) - bit_pos) >> (32 - no_of_bits);
it_bit_buff->ptr_read_next = ptr_read_next;
it_bit_buff->bit_pos = (WORD16)bit_pos;
return ret_val;
}
WORD32 impd_skip_bits_buf(ia_bit_buf_struct* it_bit_buff, WORD no_of_bits) {
UWORD8* ptr_read_next = it_bit_buff->ptr_read_next;
WORD bit_pos = it_bit_buff->bit_pos;
if (it_bit_buff->cnt_bits < no_of_bits) {
it_bit_buff->error = 1;
return -1;
}
it_bit_buff->cnt_bits -= no_of_bits;
bit_pos -= no_of_bits;
while (bit_pos < 0) {
bit_pos += 8;
ptr_read_next++;
}
it_bit_buff->ptr_read_next = ptr_read_next;
it_bit_buff->bit_pos = (WORD16)bit_pos;
return no_of_bits;
}
VOID impd_create_bit_buf(ia_bit_buf_struct* it_bit_buff,
UWORD8* ptr_bit_buf_base, WORD32 bit_buf_size) {
it_bit_buff->ptr_bit_buf_base = ptr_bit_buf_base;
it_bit_buff->ptr_bit_buf_end = ptr_bit_buf_base + bit_buf_size - 1;
it_bit_buff->ptr_read_next = ptr_bit_buf_base;
it_bit_buff->bit_pos = 7;
it_bit_buff->cnt_bits = 0;
it_bit_buff->size = bit_buf_size << 3;
it_bit_buff->error = 0;
return;
}
VOID impd_create_init_bit_buf(ia_bit_buf_struct* it_bit_buff,
UWORD8* ptr_bit_buf_base, WORD32 bit_buf_size) {
impd_create_bit_buf(it_bit_buff, ptr_bit_buf_base, bit_buf_size);
it_bit_buff->cnt_bits = (bit_buf_size << 3);
return;
}
WORD32 impd_init_drc_bitstream_dec(ia_drc_bits_dec_struct* p_drc_bs_dec_struct,
WORD32 sample_rate, WORD32 frame_size,
WORD32 delay_mode,
WORD32 lfe_channel_map_count,
WORD32* lfe_channel_map) {
WORD32 i, err_code = 0;
ia_drc_params_bs_dec_struct* ia_drc_params_struct =
&p_drc_bs_dec_struct->ia_drc_params_struct;
ia_drc_params_struct->drc_frame_size = frame_size;
if (sample_rate < MIN_DRC_SAMP_FREQ) {
return -1;
}
ia_drc_params_struct->delta_tmin_default = impd_get_delta_tmin(sample_rate);
ia_drc_params_struct->num_gain_values_max_default =
ia_drc_params_struct->drc_frame_size /
ia_drc_params_struct->delta_tmin_default;
ia_drc_params_struct->delay_mode = delay_mode;
if ((frame_size < 1) || (frame_size > AUDIO_CODEC_FRAME_SIZE_MAX) ||
(ia_drc_params_struct->drc_frame_size < 0.001f * sample_rate)) {
return -1;
}
if (ia_drc_params_struct->delta_tmin_default >
ia_drc_params_struct->drc_frame_size) {
return -1;
}
if (lfe_channel_map_count >= 0) {
if ((lfe_channel_map == NULL) ||
(lfe_channel_map_count > MAX_CHANNEL_COUNT)) {
return (-1);
}
ia_drc_params_struct->lfe_channel_map_count = lfe_channel_map_count;
for (i = 0; i < lfe_channel_map_count; i++) {
ia_drc_params_struct->lfe_channel_map[i] = lfe_channel_map[i];
}
} else {
ia_drc_params_struct->lfe_channel_map_count = -1;
for (i = 0; i < MAX_CHANNEL_COUNT; i++) {
ia_drc_params_struct->lfe_channel_map[i] = 0;
}
}
impd_init_tbls(ia_drc_params_struct->num_gain_values_max_default,
&p_drc_bs_dec_struct->tables_default);
return err_code;
}
WORD32 impd_process_drc_bitstream_dec_config(
ia_drc_bits_dec_struct* p_drc_bs_dec_struct, ia_bit_buf_struct* it_bit_buff,
ia_drc_config* pstr_drc_config, UWORD8* bitstream_config,
WORD32 num_bytes) {
WORD32 err_code = 0;
impd_create_init_bit_buf(it_bit_buff, bitstream_config, num_bytes);
err_code = impd_parse_drc_config(
it_bit_buff, &p_drc_bs_dec_struct->ia_drc_params_struct, pstr_drc_config);
if (err_code) return (err_code);
return err_code;
}
WORD32 impd_process_drc_bitstream_dec_gain(
ia_drc_bits_dec_struct* p_drc_bs_dec_struct, ia_bit_buf_struct* it_bit_buff,
ia_drc_config* pstr_drc_config, ia_drc_gain_struct* pstr_drc_gain,
UWORD8* bitstream_gain, WORD32 num_bytes, WORD32 num_bits_offset,
WORD32* num_bits_read) {
WORD32 err_code = 0;
WORD32 dummy;
impd_create_init_bit_buf(it_bit_buff, bitstream_gain, num_bytes);
dummy = impd_read_bits_buf(it_bit_buff, num_bits_offset);
if (it_bit_buff->error) return it_bit_buff->error;
err_code = impd_drc_uni_gain_read(it_bit_buff, p_drc_bs_dec_struct,
pstr_drc_config, pstr_drc_gain);
if (err_code > PROC_COMPLETE) return (err_code);
*num_bits_read = (it_bit_buff->size) - it_bit_buff->cnt_bits;
if (err_code == PROC_COMPLETE) {
return err_code;
}
return 0;
}
WORD32 impd_process_drc_bitstream_dec_loudness_info_set(
ia_bit_buf_struct* it_bit_buff,
ia_drc_loudness_info_set_struct* pstr_loudness_info,
UWORD8* bit_stream_loudness, WORD32 num_bytes_loudness) {
WORD32 err_code = 0;
impd_create_init_bit_buf(it_bit_buff, bit_stream_loudness,
num_bytes_loudness);
err_code = impd_parse_loudness_info_set(it_bit_buff, pstr_loudness_info);
return err_code;
}
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