/******************************************************************************
* *
* 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 "ixheaacd_sbr_common.h"
#include <ixheaacd_type_def.h>
#include "ixheaacd_constants.h"
#include <ixheaacd_basic_ops32.h>
#include <ixheaacd_basic_ops16.h>
#include <ixheaacd_basic_ops40.h>
#include "ixheaacd_basic_ops.h"
#include "ixheaacd_defines.h"
#include <ixheaacd_aac_rom.h>
#include "ixheaacd_aac_imdct.h"
#include "ixheaacd_bitbuffer.h"
#include <ixheaacd_basic_op.h>
#include "ixheaacd_intrinsics.h"
#include "ixheaacd_pulsedata.h"
#include "ixheaacd_pns.h"
#include "ixheaacd_common_rom.h"
#include "ixheaacd_drc_data_struct.h"
#include "ixheaacd_lt_predict.h"
#include "ixheaacd_channelinfo.h"
#include "ixheaacd_cnst.h"
#include "ixheaacd_drc_dec.h"
#include "ixheaacd_block.h"
#include "ixheaacd_channel.h"
#include "ixheaacd_pulsedata.h"
#include "ixheaacd_pns.h"
#include "ixheaacd_sbrdecoder.h"
#include "ixheaacd_error_codes.h"
#include "ixheaacd_audioobjtypes.h"
#include "ixheaacd_latmdemux.h"
#include "ixheaacd_aacdec.h"
#define LONG_BLOCK_SECT_LEN 5
#define SHORT_BLOCK_SECT_LEN 3
WORD16 ixheaacd_read_section_data(
ia_bit_buf_struct *it_bit_buff,
ia_aac_dec_channel_info_struct *ptr_aac_dec_channel_info,
WORD32 aac_spect_data_resil_flag, WORD32 aac_sect_data_resil_flag,
ia_aac_dec_tables_struct *ptr_aac_tables) {
WORD sfb;
WORD sect_cb;
WORD sect_len;
WORD sect_len_incr;
WORD sect_esc_val;
ia_ics_info_struct *ptr_ics_info = &ptr_aac_dec_channel_info->str_ics_info;
WORD max_sfb = ptr_ics_info->max_sfb;
WORD num_win_group;
WORD8 *ptr_code_book = ptr_aac_dec_channel_info->ptr_code_book;
WORD8 *ptr_code_book_temp = ptr_code_book;
WORD32 sect_bitlen = LONG_BLOCK_SECT_LEN;
int num_lines_sec_idx = 0, top;
short *ptr_num_sect_lines =
ptr_aac_dec_channel_info->num_line_in_sec4_hcr_arr;
UWORD8 *ptr_hcr_code_book = ptr_aac_dec_channel_info->cb4_hcr_arr;
const short *band_offsets = (WORD16 *)ixheaacd_getscalefactorbandoffsets(
&(ptr_aac_dec_channel_info->str_ics_info), ptr_aac_tables);
ptr_aac_dec_channel_info->number_sect = 0;
if (ptr_aac_dec_channel_info->str_ics_info.window_sequence ==
EIGHT_SHORT_SEQUENCE) {
sect_bitlen = SHORT_BLOCK_SECT_LEN;
}
sect_esc_val = (1 << sect_bitlen) - 1;
for (num_win_group = 0; num_win_group < ptr_ics_info->num_window_groups;
num_win_group++) {
sfb = 0;
while (sfb < max_sfb) {
sect_len = 0;
if (aac_sect_data_resil_flag) {
sect_cb = ixheaacd_read_bits_buf(it_bit_buff, 5);
} else {
sect_cb = ixheaacd_read_bits_buf(it_bit_buff, 4);
}
if ((aac_sect_data_resil_flag == 0) ||
((sect_cb < 11) || ((sect_cb > 11) && (sect_cb < 16)))) {
sect_len_incr = ixheaacd_read_bits_buf(it_bit_buff, sect_bitlen);
while (sect_len_incr == sect_esc_val) {
sect_len = (sect_len + sect_esc_val);
sect_len_incr = ixheaacd_read_bits_buf(it_bit_buff, sect_bitlen);
}
} else
sect_len_incr = 1;
sect_len = (sect_len + sect_len_incr);
top = (sfb + sect_len);
if (aac_spect_data_resil_flag) {
if (num_lines_sec_idx >= MAX_SFB_HCR) {
return -1;
}
ptr_num_sect_lines[num_lines_sec_idx] =
band_offsets[top] - band_offsets[sfb];
num_lines_sec_idx++;
if (sect_cb == (ESC_HCB + 1)) {
return IA_ENHAACPLUS_DEC_EXE_NONFATAL_INVALID_CODE_BOOK;
} else {
*ptr_hcr_code_book++ = sect_cb;
}
ptr_aac_dec_channel_info->number_sect++;
}
sfb = (sfb + sect_len);
if (sfb > max_sfb) {
return (WORD16)(
(WORD32)IA_ENHAACPLUS_DEC_EXE_NONFATAL_EXCEEDS_SFB_TRANSMITTED);
}
if (sect_cb == (ESC_HCB + 1)) {
return (WORD16)(
(WORD32)IA_ENHAACPLUS_DEC_EXE_NONFATAL_INVALID_CODE_BOOK);
}
while (sect_len--) {
*ptr_code_book_temp++ = sect_cb;
}
}
ptr_code_book += MAX_SCALE_FACTOR_BANDS_SHORT;
ptr_code_book_temp = ptr_code_book;
}
return AAC_DEC_OK;
}
VOID ixheaacd_read_scale_factor_data(
ia_bit_buf_struct *it_bit_buff,
ia_aac_dec_channel_info_struct *ptr_aac_dec_channel_info,
ia_aac_dec_tables_struct *ptr_aac_tables, WORD32 object_type) {
WORD sfb;
WORD16 position = 0;
WORD num_win_group;
WORD16 factor = ptr_aac_dec_channel_info->global_gain;
WORD8 *ptr_code_book, *ptr_code_book_short;
WORD16 *ptr_scale_fact, *ptr_scale_fact_short;
WORD16 norm_value;
WORD16 index, length;
const UWORD16 *hcod_sf =
ptr_aac_tables->pstr_huffmann_tables->huffman_code_book_scl;
const UWORD32 *table_idx =
ptr_aac_tables->pstr_huffmann_tables->huffman_code_book_scl_index;
WORD start_bit_pos = it_bit_buff->bit_pos;
UWORD8 *start_read_pos = it_bit_buff->ptr_read_next;
UWORD8 *ptr_read_next = it_bit_buff->ptr_read_next;
WORD32 bit_pos = 7 - it_bit_buff->bit_pos;
WORD32 read_word;
WORD32 diffbytes;
diffbytes = it_bit_buff->ptr_bit_buf_end - ptr_read_next;
diffbytes++;
if (diffbytes >= 4) {
read_word = ixheaacd_aac_showbits_32(ptr_read_next);
diffbytes = 4;
ptr_read_next = it_bit_buff->ptr_read_next + 4;
} else {
WORD32 ii;
read_word = 0;
for (ii = 0; ii < diffbytes; ii++) {
read_word = (read_word << 8) | (*ptr_read_next);
ptr_read_next++;
}
read_word <<= ((4 - diffbytes) << 3);
}
ptr_code_book = ptr_aac_dec_channel_info->ptr_code_book;
ptr_scale_fact = ptr_aac_dec_channel_info->ptr_scale_factor;
for (num_win_group = 0;
num_win_group < ptr_aac_dec_channel_info->str_ics_info.num_window_groups;
num_win_group++) {
ptr_code_book_short =
&ptr_code_book[num_win_group * MAX_SCALE_FACTOR_BANDS_SHORT];
ptr_scale_fact_short =
&ptr_scale_fact[num_win_group * MAX_SCALE_FACTOR_BANDS_SHORT];
for (sfb = ptr_aac_dec_channel_info->str_ics_info.max_sfb - 1; sfb >= 0;
sfb--) {
WORD32 sfb_cb = *ptr_code_book_short++;
if (sfb_cb == ZERO_HCB)
*ptr_scale_fact_short++ = 0;
else {
{
WORD32 pns_present = 0;
WORD pns_band;
ia_pns_info_struct *ptr_pns_info =
&ptr_aac_dec_channel_info->str_pns_info;
if (sfb_cb == NOISE_HCB && (ptr_pns_info->pns_active != 1)) {
pns_present = 1;
}
if (!pns_present) {
UWORD32 read_word1;
read_word1 = read_word << bit_pos;
ixheaacd_huffman_decode(read_word1, &index, &length, hcod_sf,
table_idx);
bit_pos += length;
ixheaacd_aac_read_byte_corr(&ptr_read_next, &bit_pos, &read_word,
it_bit_buff->ptr_bit_buf_end);
while (bit_pos > 8)
ixheaacd_aac_read_byte(&ptr_read_next, &bit_pos, &read_word);
norm_value = index - 60;
}
else {
WORD32 noise_start_value;
UWORD32 temp;
temp = (read_word << bit_pos);
temp = ((UWORD32)temp >> (32 - 9));
noise_start_value = temp;
bit_pos += 9;
ixheaacd_aac_read_2bytes(&ptr_read_next, &bit_pos, &read_word);
norm_value = noise_start_value - 256;
ptr_pns_info->pns_active = 1;
ptr_pns_info->noise_energy =
ptr_aac_dec_channel_info->global_gain - NOISE_OFFSET;
}
if ((object_type != AOT_ER_AAC_ELD) &&
(object_type != AOT_ER_AAC_LD)) {
if (sfb_cb > NOISE_HCB) {
position = position + norm_value;
*ptr_scale_fact_short++ = -position;
} else if (sfb_cb < NOISE_HCB) {
factor = factor + norm_value;
*ptr_scale_fact_short++ = factor;
} else {
ptr_pns_info->noise_energy =
ixheaacd_add16_sat(ptr_pns_info->noise_energy, norm_value);
pns_band = (num_win_group << 4) +
ptr_aac_dec_channel_info->str_ics_info.max_sfb - sfb -
1;
ptr_aac_dec_channel_info->ptr_scale_factor[pns_band] =
ptr_pns_info->noise_energy;
ptr_pns_info->pns_used[pns_band] = 1;
ptr_scale_fact_short++;
}
} else {
if ((sfb_cb == INTENSITY_HCB) || (sfb_cb == INTENSITY_HCB2)) {
position = position + norm_value;
*ptr_scale_fact_short++ = -position;
} else if (sfb_cb == NOISE_HCB) {
ptr_pns_info->noise_energy =
ixheaacd_add16_sat(ptr_pns_info->noise_energy, norm_value);
pns_band = (num_win_group << 4) +
ptr_aac_dec_channel_info->str_ics_info.max_sfb - sfb -
1;
ptr_aac_dec_channel_info->ptr_scale_factor[pns_band] =
ptr_pns_info->noise_energy;
ptr_pns_info->pns_used[pns_band] = 1;
ptr_scale_fact_short++;
} else {
factor = factor + norm_value;
*ptr_scale_fact_short++ = factor;
}
}
}
}
}
}
it_bit_buff->ptr_read_next = ptr_read_next - diffbytes;
it_bit_buff->bit_pos = 7 - bit_pos;
{
WORD bits_consumed;
bits_consumed = ((it_bit_buff->ptr_read_next - start_read_pos) << 3) +
(start_bit_pos - it_bit_buff->bit_pos);
it_bit_buff->cnt_bits -= bits_consumed;
}
}