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v811_spc009/external/libxaac/decoder/ixheaacd_rev_vlc.c

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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 <string.h>
#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_bitbuffer.h"
#include "ixheaacd_error_codes.h"
#include "ixheaacd_defines.h"
#include "ixheaacd_aac_rom.h"
#include "ixheaacd_pulsedata.h"
#include "ixheaacd_pns.h"
#include "ixheaacd_drc_data_struct.h"
#include "ixheaacd_lt_predict.h"
#include "ixheaacd_channelinfo.h"
#include "ixheaacd_drc_dec.h"
#include "ixheaacd_sbrdecoder.h"
#include "ixheaacd_block.h"
#include "ixheaacd_channel.h"
#include "ixheaacd_common_rom.h"
#include "ixheaacd_basic_funcs.h"
#include "ixheaacd_basic_op.h"
#include "ixheaacd_aacdec.h"
#include "ixheaacd_sbrdecsettings.h"
#include "ixheaacd_sbr_scale.h"
#include "ixheaacd_env_extr_part.h"
#include "ixheaacd_sbr_rom.h"
#include "ixheaacd_audioobjtypes.h"
#include "ixheaacd_sbrdecoder.h"
#include "ixheaacd_memory_standards.h"
#include "ixheaacd_latmdemux.h"
#include "ixheaacd_mps_polyphase.h"
#include "ixheaacd_config.h"
#include "ixheaacd_mps_dec.h"
#include "ixheaacd_struct_def.h"
#include "ixheaacd_cnst.h"
#define RVLC_ERROR_ALL_ESCAPE_WORDS_INVALID 0x80000000
#define RVLC_ERROR_RVL_SUM_BIT_COUNTER_BELOW_ZERO_FWD 0x40000000
#define RVLC_ERROR_RVL_SUM_BIT_COUNTER_BELOW_ZERO_BWD 0x20000000
#define RVLC_ERROR_FORBIDDEN_CW_DETECTED_FWD 0x08000000
#define RVLC_ERROR_FORBIDDEN_CW_DETECTED_BWD 0x04000000
#define FWD 0
#define BWD 1
#define MAX_RVL 7
#define MIN_RVL -7
#define MAX_ALLOWED_DPCM_INDEX 14
#define TABLE_OFFSET 7
#define MAX_LEN_RVLC_CODE_WORD 9
#define MAX_LEN_RVLC_ESCAPE_WORD 20
#define DPCM_NOISE_NRG_BITS 9
#define SF_OFFSET 100
#define CONCEAL_MAX_INIT 1311
#define CONCEAL_MIN_INIT -1311
#define RVLC_MAX_SFB ((8) * (16))
#define MASK_LEFT 0xFFF000
#define MASK_RIGHT 0xFFF
#define CLR_BIT_10 0x3FF
#define NODE_MASK 0x400
#define LEFT_OFFSET 12
#define ixheaacd_bitbuf_checkpoint(it_bit_buf, saved_bit_buf) \
(saved_bit_buf) = (it_bit_buf)
#define ixheaacd_bitbuf_restore(it_bit_buf, saved_bit_buf) \
(it_bit_buf) = (saved_bit_buf)
static int ixheaacd_rvlc_decode(short cw, int len, int *found) {
short indx = 0;
*found = 0;
switch (len) {
case 1:
if (cw == 0)
indx = 0;
else
return 3;
break;
case 3:
switch (cw) {
case 5:
indx = -1;
break;
case 7:
indx = 1;
break;
default:
return 4;
}
break;
case 4:
if (cw == 9)
indx = -2;
else
return 5;
break;
case 5:
switch (cw) {
case 17:
indx = -3;
break;
case 27:
indx = 2;
break;
default:
return 6;
}
break;
case 6:
switch (cw) {
case 33:
indx = -4;
break;
case 51:
indx = 3;
break;
default:
return 7;
}
break;
case 7:
switch (cw) {
case 65:
indx = -7;
break;
case 107:
indx = 4;
break;
case 99:
indx = 7;
break;
default:
return 8;
}
break;
case 8:
switch (cw) {
case 129:
indx = -5;
break;
case 195:
indx = 5;
break;
default:
return 9;
}
break;
case 9:
switch (cw) {
case 257:
indx = -6;
break;
case 427:
indx = 6;
break;
default:
return -1;
}
break;
default:
return -1;
}
*found = 1;
return indx;
}
static int ixheaacd_rvlc_decode_esc(int cw, int len, int *found) {
short indx = 0;
*found = 0;
switch (len) {
case 2:
switch (cw) {
case 2:
indx = 0;
break;
case 0:
indx = 1;
break;
default:
return 3;
}
break;
case 3:
switch (cw) {
case 6:
indx = 2;
break;
case 2:
indx = 3;
break;
default:
return 4;
}
break;
case 4:
if (cw == 14)
indx = 4;
else
return 5;
break;
case 5:
switch (cw) {
case 31:
indx = 5;
break;
case 15:
indx = 6;
break;
case 13:
indx = 7;
break;
default:
return 6;
}
break;
case 6:
switch (cw) {
case 61:
indx = 8;
break;
case 29:
indx = 9;
break;
case 25:
indx = 10;
break;
case 24:
indx = 11;
break;
default:
return 7;
}
break;
case 7:
switch (cw) {
case 120:
indx = 12;
break;
case 56:
indx = 13;
break;
default:
return 8;
}
break;
case 8:
switch (cw) {
case 242:
indx = 14;
break;
case 114:
indx = 15;
break;
default:
return 9;
}
break;
case 9:
switch (cw) {
case 486:
indx = 16;
break;
case 230:
indx = 17;
break;
default:
return 10;
}
break;
case 10:
switch (cw) {
case 974:
indx = 18;
break;
case 463:
indx = 19;
break;
default:
return 11;
}
break;
case 11:
switch (cw) {
case 1950:
indx = 20;
break;
case 1951:
indx = 21;
break;
case 925:
indx = 22;
break;
default:
return 12;
}
break;
case 12:
if (cw == 1848)
indx = 23;
else
return 13;
break;
case 13:
if (cw == 3698)
indx = 25;
else
return 14;
break;
case 14:
if (cw == 7399)
indx = 24;
else
return 15;
break;
case 15:
if (cw == 14797)
indx = 26;
else
return 19;
break;
case 19:
if ((cw >= 236736) && (cw <= 236740))
indx = 53 - (236740 - cw);
else
return 20;
break;
case 20:
if ((cw >= 473482) && (cw <= 473503))
indx = 48 - (473503 - cw);
else
return -1;
break;
default:
return -1;
}
*found = 1;
return indx;
}
static VOID ixheaacd_rvlc_check_intensity_cb(
ia_rvlc_info_struct *ptr_rvlc,
ia_aac_dec_channel_info_struct *ptr_aac_dec_channel_info) {
WORD32 group, band, bnds;
ptr_rvlc->intensity_used = 0;
for (group = 0; group < ptr_rvlc->num_wind_grps; group++) {
for (band = 0; band < ptr_rvlc->max_sfb_transmitted; band++) {
bnds = 16 * group + band;
if ((ptr_aac_dec_channel_info->ptr_code_book[bnds] == INTENSITY_HCB) ||
(ptr_aac_dec_channel_info->ptr_code_book[bnds] == INTENSITY_HCB2)) {
ptr_rvlc->intensity_used = 1;
break;
}
}
}
}
VOID ixheaacd_carry_bit_branch_val(UWORD8 carry_bit, UWORD32 tree_node,
UWORD32 *branch_val, UWORD32 *branch_node) {
if (carry_bit == 0) {
*branch_node = (tree_node & MASK_LEFT) >> LEFT_OFFSET;
} else {
*branch_node = tree_node & MASK_RIGHT;
}
*branch_val = *branch_node & CLR_BIT_10;
}
UWORD8 ixheaacd_rvlc_read_bits(ia_bit_buf_struct *it_bit_buff,
UWORD16 *ptr_position, UWORD8 read_direction) {
UWORD32 bit;
WORD32 read_bit_offset =
*ptr_position - (it_bit_buff->size - it_bit_buff->cnt_bits);
if (read_bit_offset) it_bit_buff->cnt_bits -= read_bit_offset;
it_bit_buff->ptr_read_next =
it_bit_buff->ptr_bit_buf_base +
((it_bit_buff->size - it_bit_buff->cnt_bits) >> 3);
it_bit_buff->bit_pos = ((it_bit_buff->size - it_bit_buff->cnt_bits) & 7);
if (read_direction == 0) {
bit = ixheaacd_aac_read_bit_rev(it_bit_buff);
*ptr_position += 1;
} else {
bit = ixheaacd_aac_read_bit(it_bit_buff);
*ptr_position -= 1;
}
return (bit);
}
static WORD8 ixheaacd_rvlc_decode_escape_word(ia_rvlc_info_struct *ptr_rvlc,
ia_bit_buf_struct *it_bit_buff) {
WORD32 i;
UWORD8 carry_bit;
UWORD16 *ptr_bitstream_index_esc;
int len = 0;
int codeword = 0;
int found = 0;
int indx;
ptr_bitstream_index_esc = &(ptr_rvlc->esc_bit_str_idx);
for (i = MAX_LEN_RVLC_ESCAPE_WORD - 1; i >= 0; i--) {
carry_bit =
ixheaacd_rvlc_read_bits(it_bit_buff, ptr_bitstream_index_esc, FWD);
len++;
codeword = codeword << 1 | carry_bit;
indx = ixheaacd_rvlc_decode_esc(codeword, len, &found);
if (found) {
ptr_rvlc->rvlc_esc_len -= (MAX_LEN_RVLC_ESCAPE_WORD - i);
return indx;
}
}
ptr_rvlc->rvlc_err_log |= RVLC_ERROR_ALL_ESCAPE_WORDS_INVALID;
return -1;
}
static VOID ixheaacd_rvlc_decode_escape(ia_rvlc_info_struct *ptr_rvlc,
WORD16 *ptr_escape,
ia_bit_buf_struct *it_bit_buff) {
WORD8 esc_word;
WORD8 esc_cnt = 0;
WORD16 *ptr_esc_bit_cnt_sum;
ptr_esc_bit_cnt_sum = &(ptr_rvlc->rvlc_esc_len);
while (*ptr_esc_bit_cnt_sum > 0) {
esc_word = ixheaacd_rvlc_decode_escape_word(ptr_rvlc, it_bit_buff);
if (esc_word >= 0) {
ptr_escape[esc_cnt] = esc_word;
esc_cnt++;
} else {
ptr_rvlc->rvlc_err_log |= RVLC_ERROR_ALL_ESCAPE_WORDS_INVALID;
ptr_rvlc->num_esc_words_decoded = esc_cnt;
return;
}
}
ptr_rvlc->num_esc_words_decoded = esc_cnt;
}
WORD8 ixheaacd_decode_rvlc_code_word(ia_bit_buf_struct *it_bit_buff,
ia_rvlc_info_struct *ptr_rvlc) {
WORD32 i;
UWORD8 carry_bit;
UWORD8 direction = ptr_rvlc->direction;
UWORD16 *ptr_bit_str_idx_rvl = ptr_rvlc->ptr_rvl_bit_str_idx;
int len = 0;
short codeword = 0;
int found = 0;
int indx;
for (i = MAX_LEN_RVLC_CODE_WORD - 1; i >= 0; i--) {
carry_bit =
ixheaacd_rvlc_read_bits(it_bit_buff, ptr_bit_str_idx_rvl, direction);
len++;
codeword = codeword << 1 | carry_bit;
indx = ixheaacd_rvlc_decode(codeword, len, &found);
if (found) {
indx = indx + 7;
*ptr_rvlc->ptr_rvl_bit_cnt -= (MAX_LEN_RVLC_CODE_WORD - i);
return indx;
}
}
return -1;
}
static VOID ixheaacd_rvlc_decode_forward(
ia_rvlc_info_struct *ptr_rvlc,
ia_aac_dec_channel_info_struct *ptr_aac_dec_channel_info,
ia_bit_buf_struct *it_bit_buff) {
WORD32 band = 0;
WORD32 group = 0;
WORD32 bnds = 0;
WORD16 dpcm;
ia_bit_buf_struct temp_buf = {0};
WORD16 factor = ptr_aac_dec_channel_info->global_gain;
WORD16 position = 0;
WORD16 noise_energy = ptr_aac_dec_channel_info->global_gain - 90 - 256;
WORD16 *ptr_scf_fwd = ptr_aac_dec_channel_info->rvlc_scf_fwd_arr;
WORD16 *ptr_scf_esc = ptr_aac_dec_channel_info->rvlc_scf_esc_arr;
UWORD8 *ptr_esc_fwd_cnt = &(ptr_rvlc->num_fwd_esc_words_decoded);
ptr_rvlc->ptr_rvl_bit_cnt = &(ptr_rvlc->rvlc_sf_fwd_len);
ptr_rvlc->ptr_rvl_bit_str_idx = &(ptr_rvlc->rvl_fwd_bit_str_idx);
*ptr_esc_fwd_cnt = 0;
ptr_rvlc->direction = 0;
ptr_rvlc->noise_used = 0;
ptr_rvlc->sf_used = 0;
ptr_rvlc->last_scale_fac = 0;
ptr_rvlc->last_nrg = 0;
ptr_rvlc->is_last = 0;
ixheaacd_rvlc_check_intensity_cb(ptr_rvlc, ptr_aac_dec_channel_info);
for (group = 0; group < ptr_rvlc->num_wind_grps; group++) {
for (band = 0; band < ptr_rvlc->max_sfb_transmitted; band++) {
bnds = 16 * group + band;
switch (ptr_aac_dec_channel_info->ptr_code_book[bnds]) {
case ZERO_HCB:
ptr_scf_fwd[bnds] = 0;
break;
case INTENSITY_HCB2:
case INTENSITY_HCB:
{
dpcm = ixheaacd_decode_rvlc_code_word(it_bit_buff, ptr_rvlc);
if (dpcm < 0) {
ptr_rvlc->conceal_max = bnds;
return;
}
dpcm -= 7;
}
if ((dpcm == -7) || (dpcm == 7)) {
if (ptr_rvlc->rvlc_esc_len) {
ptr_rvlc->conceal_max = bnds;
return;
} else {
if (dpcm == -7) {
dpcm -= *ptr_scf_esc++;
} else {
dpcm += *ptr_scf_esc++;
}
(*ptr_esc_fwd_cnt)++;
if (ptr_rvlc->conceal_max_esc == 1311) {
ptr_rvlc->conceal_max_esc = bnds;
}
}
}
position += dpcm;
ptr_scf_fwd[bnds] = position;
ptr_rvlc->is_last = position;
break;
case NOISE_HCB:
if (ptr_rvlc->noise_used == 0) {
ptr_rvlc->noise_used = 1;
ptr_rvlc->first_noise_band = bnds;
noise_energy += ptr_rvlc->dpcm_noise_nrg;
ptr_scf_fwd[bnds] = noise_energy;
ptr_rvlc->last_nrg = noise_energy;
} else {
dpcm = ixheaacd_decode_rvlc_code_word(it_bit_buff, ptr_rvlc);
if (dpcm < 0) {
ptr_rvlc->conceal_max = bnds;
return;
}
dpcm -= 7;
if ((dpcm == -7) || (dpcm == 7)) {
if (ptr_rvlc->rvlc_esc_len) {
ptr_rvlc->conceal_max = bnds;
return;
} else {
if (dpcm == -7) {
dpcm -= *ptr_scf_esc++;
} else {
dpcm += *ptr_scf_esc++;
}
(*ptr_esc_fwd_cnt)++;
if (ptr_rvlc->conceal_max_esc == 1311) {
ptr_rvlc->conceal_max_esc = bnds;
}
}
}
noise_energy += dpcm;
ptr_scf_fwd[bnds] = noise_energy;
ptr_rvlc->last_nrg = noise_energy;
}
ptr_aac_dec_channel_info->str_pns_info.pns_used[bnds] = 1;
break;
default:
ptr_rvlc->sf_used = 1;
{
memcpy(&temp_buf, it_bit_buff, sizeof(ia_bit_buf_struct));
dpcm = ixheaacd_decode_rvlc_code_word(it_bit_buff, ptr_rvlc);
if (dpcm < 0) {
ptr_rvlc->conceal_max = bnds;
return;
}
dpcm -= 7;
}
if ((dpcm == -7) || (dpcm == 7)) {
if (ptr_rvlc->rvlc_esc_len) {
ptr_rvlc->conceal_max = bnds;
return;
} else {
if (dpcm == -7) {
dpcm -= *ptr_scf_esc++;
} else {
dpcm += *ptr_scf_esc++;
}
(*ptr_esc_fwd_cnt)++;
if (ptr_rvlc->conceal_max_esc == 1311) {
ptr_rvlc->conceal_max_esc = bnds;
}
}
}
factor += dpcm;
ptr_scf_fwd[bnds] = factor;
ptr_rvlc->last_scale_fac = factor;
break;
}
}
}
if (ptr_rvlc->intensity_used) {
dpcm = ixheaacd_decode_rvlc_code_word(it_bit_buff, ptr_rvlc);
if (dpcm < 0) {
ptr_rvlc->conceal_max = bnds;
return;
}
dpcm -= 7;
if ((dpcm == -7) || (dpcm == 7)) {
if (ptr_rvlc->rvlc_esc_len) {
ptr_rvlc->conceal_max = bnds;
return;
} else {
if (dpcm == -7) {
dpcm -= *ptr_scf_esc++;
} else {
dpcm += *ptr_scf_esc++;
}
(*ptr_esc_fwd_cnt)++;
if (ptr_rvlc->conceal_max_esc == 1311) {
ptr_rvlc->conceal_max_esc = bnds;
}
}
}
ptr_rvlc->dpcm_is_last_pos = dpcm;
}
}
static VOID ixheaacd_rvlc_decode_backward(
ia_rvlc_info_struct *ptr_rvlc,
ia_aac_dec_channel_info_struct *ptr_aac_dec_channel_info,
ia_bit_buf_struct *it_bit_buff) {
WORD16 band, group, dpcm, ixheaacd_drc_offset;
WORD16 bnds = ptr_rvlc->max_sfb_transmitted - 1;
WORD16 factor = ptr_rvlc->rev_global_gain;
WORD16 position = ptr_rvlc->dpcm_is_last_pos;
WORD16 noise_energy =
ptr_rvlc->rev_global_gain + ptr_rvlc->dpcm_noise_last_pos - 90 - 256;
WORD16 *ptr_scf_bwd = ptr_aac_dec_channel_info->rvlc_scf_bwd_arr;
WORD16 *ptr_scf_esc = ptr_aac_dec_channel_info->rvlc_scf_esc_arr;
UWORD8 *ptr_esc_cnt = &(ptr_rvlc->num_esc_words_decoded);
UWORD8 *ptr_esc_bwd_cnt = &(ptr_rvlc->num_bwd_esc_words_decoded);
ptr_rvlc->ptr_rvl_bit_cnt = &(ptr_rvlc->rvlc_sf_bwd_len);
ptr_rvlc->ptr_rvl_bit_str_idx = &(ptr_rvlc->rvl_bwd_bit_str_idx);
*ptr_esc_bwd_cnt = 0;
ptr_rvlc->direction = 1;
ptr_scf_esc += *ptr_esc_cnt - 1;
ptr_rvlc->firt_scale_fac = 0;
ptr_rvlc->first_nrg = 0;
ptr_rvlc->is_first = 0;
if (ptr_rvlc->intensity_used) {
dpcm = ixheaacd_decode_rvlc_code_word(it_bit_buff, ptr_rvlc);
if (dpcm < 0) {
ptr_rvlc->dpcm_is_last_pos = 0;
ptr_rvlc->conceal_min = bnds;
return;
}
dpcm -= 7;
if ((dpcm == -7) || (dpcm == 7)) {
if (ptr_rvlc->rvlc_esc_len) {
ptr_rvlc->conceal_min = bnds;
return;
} else {
if (dpcm == -7) {
dpcm -= *ptr_scf_esc--;
} else {
dpcm += *ptr_scf_esc--;
}
(*ptr_esc_bwd_cnt)++;
if (ptr_rvlc->conceal_min_esc == -1311) {
ptr_rvlc->conceal_min_esc = bnds;
}
}
}
ptr_rvlc->dpcm_is_last_pos = dpcm;
}
for (group = ptr_rvlc->num_wind_grps - 1; group >= 0; group--) {
for (band = ptr_rvlc->max_sfb_transmitted - 1; band >= 0; band--) {
bnds = 16 * group + band;
if ((band == 0) && (ptr_rvlc->num_wind_grps != 1))
ixheaacd_drc_offset = 16 - ptr_rvlc->max_sfb_transmitted + 1;
else
ixheaacd_drc_offset = 1;
switch (ptr_aac_dec_channel_info->ptr_code_book[bnds]) {
case ZERO_HCB:
ptr_scf_bwd[bnds] = 0;
break;
case INTENSITY_HCB2:
case INTENSITY_HCB:
dpcm = ixheaacd_decode_rvlc_code_word(it_bit_buff, ptr_rvlc);
if (dpcm < 0) {
ptr_scf_bwd[bnds] = position;
return;
}
dpcm -= 7;
if ((dpcm == -7) || (dpcm == 7)) {
if (ptr_rvlc->rvlc_esc_len) {
ptr_scf_bwd[bnds] = position;
return;
} else {
if (dpcm == -7) {
dpcm -= *ptr_scf_esc--;
} else {
dpcm += *ptr_scf_esc--;
}
(*ptr_esc_bwd_cnt)++;
if (ptr_rvlc->conceal_min_esc == -1311) {
}
}
}
ptr_scf_bwd[bnds] = position;
position -= dpcm;
ptr_rvlc->is_first = position;
break;
case NOISE_HCB:
if (bnds == ptr_rvlc->first_noise_band) {
ptr_scf_bwd[bnds] = ptr_rvlc->dpcm_noise_nrg +
ptr_aac_dec_channel_info->global_gain - 90 -
256;
ptr_rvlc->first_nrg = ptr_scf_bwd[bnds];
} else {
dpcm = ixheaacd_decode_rvlc_code_word(it_bit_buff, ptr_rvlc);
if (dpcm < 0) {
ptr_scf_bwd[bnds] = noise_energy;
return;
}
dpcm -= 7;
if ((dpcm == -7) || (dpcm == 7)) {
if (ptr_rvlc->rvlc_esc_len) {
ptr_scf_bwd[bnds] = noise_energy;
return;
} else {
if (dpcm == -7) {
dpcm -= *ptr_scf_esc--;
} else {
dpcm += *ptr_scf_esc--;
}
(*ptr_esc_bwd_cnt)++;
if (ptr_rvlc->conceal_min_esc == -1311) {
}
}
}
ptr_scf_bwd[bnds] = noise_energy;
noise_energy -= dpcm;
ptr_rvlc->first_nrg = noise_energy;
}
break;
default:
dpcm = ixheaacd_decode_rvlc_code_word(it_bit_buff, ptr_rvlc);
if (dpcm < 0) {
ptr_scf_bwd[bnds] = factor;
return;
}
dpcm -= 7;
if ((dpcm == -7) || (dpcm == 7)) {
if (ptr_rvlc->rvlc_esc_len) {
ptr_scf_bwd[bnds] = factor;
return;
} else {
if (dpcm == -7) {
dpcm -= *ptr_scf_esc--;
} else {
dpcm += *ptr_scf_esc--;
}
(*ptr_esc_bwd_cnt)++;
if (ptr_rvlc->conceal_min_esc == -1311) {
}
}
}
ptr_scf_bwd[bnds] = factor;
factor -= dpcm;
ptr_rvlc->firt_scale_fac = factor;
break;
}
}
}
}
VOID ixheaacd_rvlc_read(
ia_bit_buf_struct *it_bit_buff,
ia_aac_dec_channel_info_struct *ptr_aac_dec_channel_info) {
ia_rvlc_info_struct *ptr_rvlc = &ptr_aac_dec_channel_info->ptr_rvlc_info;
WORD32 group, band;
ptr_rvlc->num_wind_grps =
ptr_aac_dec_channel_info->str_ics_info.num_window_groups;
ptr_rvlc->max_sfb_transmitted =
ptr_aac_dec_channel_info->str_ics_info.max_sfb;
ptr_rvlc->noise_used = 0;
ptr_rvlc->dpcm_noise_nrg = 0;
ptr_rvlc->dpcm_noise_last_pos = 0;
ptr_rvlc->rvlc_esc_len = -1;
ptr_rvlc->dpcm_is_last_pos = 0;
ptr_rvlc->sf_concealment = ixheaacd_read_bits_buf(it_bit_buff, 1);
ptr_rvlc->rev_global_gain = ixheaacd_read_bits_buf(it_bit_buff, 8);
if (ptr_aac_dec_channel_info->str_ics_info.window_sequence ==
EIGHT_SHORT_SEQUENCE) {
ptr_rvlc->rvlc_sf_len = ixheaacd_read_bits_buf(it_bit_buff, 11);
} else {
ptr_rvlc->rvlc_sf_len = ixheaacd_read_bits_buf(it_bit_buff, 9);
}
for (group = 0; group < ptr_rvlc->num_wind_grps; group++) {
for (band = 0; band < ptr_rvlc->max_sfb_transmitted; band++) {
if (ptr_aac_dec_channel_info->ptr_code_book[16 * group + band] ==
NOISE_HCB) {
ptr_rvlc->noise_used = 1;
break;
}
}
}
if (ptr_rvlc->noise_used)
ptr_rvlc->dpcm_noise_nrg = ixheaacd_read_bits_buf(it_bit_buff, 9);
ptr_rvlc->sf_esc_present = ixheaacd_read_bits_buf(it_bit_buff, 1);
if (ptr_rvlc->sf_esc_present) {
ptr_rvlc->rvlc_esc_len = ixheaacd_read_bits_buf(it_bit_buff, 8);
}
if (ptr_rvlc->noise_used) {
ptr_rvlc->dpcm_noise_last_pos = ixheaacd_read_bits_buf(it_bit_buff, 9);
ptr_rvlc->rvlc_sf_len -= 9;
}
ptr_rvlc->rvlc_sf_fwd_len = ptr_rvlc->rvlc_sf_len;
ptr_rvlc->rvlc_sf_bwd_len = ptr_rvlc->rvlc_sf_len;
}
VOID ixheaacd_hcr_read(ia_bit_buf_struct *it_bit_buff,
ia_aac_dec_channel_info_struct *ptr_aac_dec_channel_info,
WORD32 ele_type) {
WORD16 len_reordered_spec_data;
WORD8 len_longest_code_word;
ptr_aac_dec_channel_info->reorder_spect_data_len = 0;
ptr_aac_dec_channel_info->longest_cw_len = 0;
len_reordered_spec_data = ixheaacd_read_bits_buf(it_bit_buff, 14);
if (ele_type == ID_CPE) {
if ((len_reordered_spec_data >= 0) && (len_reordered_spec_data <= 12288)) {
ptr_aac_dec_channel_info->reorder_spect_data_len =
len_reordered_spec_data;
} else {
if (len_reordered_spec_data > 12288) {
ptr_aac_dec_channel_info->reorder_spect_data_len = 12288;
}
}
} else if (ele_type == ID_SCE || ele_type == ID_LFE || ele_type == ID_CCE) {
if ((len_reordered_spec_data >= 0) && (len_reordered_spec_data <= 6144)) {
ptr_aac_dec_channel_info->reorder_spect_data_len =
len_reordered_spec_data;
} else {
if (len_reordered_spec_data > 6144) {
ptr_aac_dec_channel_info->reorder_spect_data_len = 6144;
}
}
}
len_longest_code_word = ixheaacd_read_bits_buf(it_bit_buff, 6);
if ((len_longest_code_word >= 0) && (len_longest_code_word <= 49)) {
ptr_aac_dec_channel_info->longest_cw_len = len_longest_code_word;
} else {
if (len_longest_code_word > 49) {
ptr_aac_dec_channel_info->longest_cw_len = 49;
}
}
}
static WORD32 ixheaacd_rvlc_init(
ia_rvlc_info_struct *ptr_rvlc,
ia_aac_dec_channel_info_struct *ptr_aac_dec_channel_info,
ia_bit_buf_struct *it_bit_buff) {
WORD16 *ptr_scf_esc = ptr_aac_dec_channel_info->rvlc_scf_esc_arr;
WORD16 *ptr_scf_fwd = ptr_aac_dec_channel_info->rvlc_scf_fwd_arr;
WORD16 *ptr_scf_bwd = ptr_aac_dec_channel_info->rvlc_scf_bwd_arr;
WORD16 *ptr_scale_factor = ptr_aac_dec_channel_info->ptr_scale_factor;
WORD32 bnds;
ptr_aac_dec_channel_info->rvlc_intensity_used = 0;
ptr_rvlc->num_esc_words_decoded = 0;
ptr_rvlc->num_fwd_esc_words_decoded = 0;
ptr_rvlc->num_bwd_esc_words_decoded = 0;
ptr_rvlc->intensity_used = 0;
ptr_rvlc->rvlc_err_log = 0;
ptr_rvlc->conceal_max = CONCEAL_MAX_INIT;
ptr_rvlc->conceal_min = CONCEAL_MIN_INIT;
ptr_rvlc->conceal_max_esc = CONCEAL_MAX_INIT;
ptr_rvlc->conceal_min_esc = CONCEAL_MIN_INIT;
for (bnds = 0; bnds < RVLC_MAX_SFB; bnds++) {
ptr_scf_fwd[bnds] = 0;
ptr_scf_bwd[bnds] = 0;
ptr_scf_esc[bnds] = 0;
ptr_scale_factor[bnds] = 0;
}
ptr_rvlc->rvl_fwd_bit_str_idx = it_bit_buff->size - it_bit_buff->cnt_bits;
ptr_rvlc->rvl_bwd_bit_str_idx =
it_bit_buff->size - it_bit_buff->cnt_bits + ptr_rvlc->rvlc_sf_len - 1;
it_bit_buff->cnt_bits -= ptr_rvlc->rvlc_sf_len;
it_bit_buff->ptr_read_next =
it_bit_buff->ptr_bit_buf_base +
((it_bit_buff->size - it_bit_buff->cnt_bits) >> 3);
it_bit_buff->bit_pos = ((it_bit_buff->size - it_bit_buff->cnt_bits) & 7);
if (ptr_rvlc->sf_esc_present != 0) {
ptr_rvlc->esc_bit_str_idx = it_bit_buff->size - it_bit_buff->cnt_bits;
it_bit_buff->cnt_bits -= ptr_rvlc->rvlc_esc_len;
it_bit_buff->ptr_read_next =
it_bit_buff->ptr_bit_buf_base +
((it_bit_buff->size - it_bit_buff->cnt_bits) >> 3);
it_bit_buff->bit_pos = ((it_bit_buff->size - it_bit_buff->cnt_bits) & 7);
}
if (it_bit_buff->cnt_bits < 0) {
return IA_ENHAACPLUS_DEC_EXE_NONFATAL_INSUFFICIENT_INPUT_BYTES;
} else
return 0;
}
VOID ixheaacd_bi_dir_est_scf_prev_frame_reference(
ia_aac_dec_channel_info_struct *ptr_aac_dec_channel_info,
ia_aac_dec_overlap_info *ptr_aac_dec_static_channel_info) {
ia_rvlc_info_struct *ptr_rvlc = &ptr_aac_dec_channel_info->ptr_rvlc_info;
WORD32 band, bnds, start_band, end_band, group;
WORD32 conceal_min, conceal_max;
WORD32 conceal_group_min, conceal_group_max;
WORD32 max_scf_bands;
WORD32 common_min;
if (ptr_aac_dec_channel_info->str_ics_info.window_sequence ==
EIGHT_SHORT_SEQUENCE) {
max_scf_bands = 16;
} else {
max_scf_bands = 64;
}
if (ptr_rvlc->conceal_min == CONCEAL_MIN_INIT) ptr_rvlc->conceal_min = 0;
if (ptr_rvlc->conceal_max == CONCEAL_MAX_INIT)
ptr_rvlc->conceal_max =
(ptr_rvlc->num_wind_grps - 1) * 16 + ptr_rvlc->max_sfb_transmitted - 1;
conceal_min = ptr_rvlc->conceal_min % max_scf_bands;
conceal_group_min = ptr_rvlc->conceal_min / max_scf_bands;
conceal_max = ptr_rvlc->conceal_max % max_scf_bands;
conceal_group_max = ptr_rvlc->conceal_max / max_scf_bands;
ptr_aac_dec_channel_info->rvlc_scf_fwd_arr[ptr_rvlc->conceal_max] =
ptr_aac_dec_channel_info->rvlc_scf_bwd_arr[ptr_rvlc->conceal_max];
ptr_aac_dec_channel_info->rvlc_scf_bwd_arr[ptr_rvlc->conceal_min] =
ptr_aac_dec_channel_info->rvlc_scf_fwd_arr[ptr_rvlc->conceal_min];
start_band = conceal_min;
if (conceal_group_min == conceal_group_max)
end_band = conceal_max;
else
end_band = ptr_rvlc->max_sfb_transmitted - 1;
for (group = conceal_group_min; group <= conceal_group_max; group++) {
for (band = start_band; band <= end_band; band++) {
bnds = 16 * group + band;
switch (ptr_aac_dec_channel_info->ptr_code_book[bnds]) {
case ZERO_HCB:
ptr_aac_dec_channel_info->ptr_scale_factor[bnds] = 0;
break;
case INTENSITY_HCB:
case INTENSITY_HCB2:
if ((ptr_aac_dec_static_channel_info->rvlc_prev_cb[bnds] ==
INTENSITY_HCB) ||
(ptr_aac_dec_static_channel_info->rvlc_prev_cb[bnds] ==
INTENSITY_HCB2)) {
common_min = ixheaacd_min32(
ptr_aac_dec_channel_info->rvlc_scf_fwd_arr[bnds],
ptr_aac_dec_channel_info->rvlc_scf_bwd_arr[bnds]);
ptr_aac_dec_channel_info->ptr_scale_factor[bnds] = ixheaacd_min32(
common_min,
ptr_aac_dec_static_channel_info->rvlc_prev_sf[bnds]);
} else {
ptr_aac_dec_channel_info->ptr_scale_factor[bnds] = ixheaacd_min32(
ptr_aac_dec_channel_info->rvlc_scf_fwd_arr[bnds],
ptr_aac_dec_channel_info->rvlc_scf_bwd_arr[bnds]);
}
break;
case NOISE_HCB:
if (ptr_aac_dec_static_channel_info->rvlc_prev_cb[bnds] ==
NOISE_HCB) {
common_min = ixheaacd_min32(
ptr_aac_dec_channel_info->rvlc_scf_fwd_arr[bnds],
ptr_aac_dec_channel_info->rvlc_scf_bwd_arr[bnds]);
ptr_aac_dec_channel_info->ptr_scale_factor[bnds] = ixheaacd_min32(
common_min,
ptr_aac_dec_static_channel_info->rvlc_prev_sf[bnds]);
} else {
ptr_aac_dec_channel_info->ptr_scale_factor[bnds] = ixheaacd_min32(
ptr_aac_dec_channel_info->rvlc_scf_fwd_arr[bnds],
ptr_aac_dec_channel_info->rvlc_scf_bwd_arr[bnds]);
}
break;
default:
if ((ptr_aac_dec_static_channel_info->rvlc_prev_cb[bnds] !=
ZERO_HCB) &&
(ptr_aac_dec_static_channel_info->rvlc_prev_cb[bnds] !=
NOISE_HCB) &&
(ptr_aac_dec_static_channel_info->rvlc_prev_cb[bnds] !=
INTENSITY_HCB) &&
(ptr_aac_dec_static_channel_info->rvlc_prev_cb[bnds] !=
INTENSITY_HCB2)) {
common_min = ixheaacd_min32(
ptr_aac_dec_channel_info->rvlc_scf_fwd_arr[bnds],
ptr_aac_dec_channel_info->rvlc_scf_bwd_arr[bnds]);
ptr_aac_dec_channel_info->ptr_scale_factor[bnds] = ixheaacd_min32(
common_min,
ptr_aac_dec_static_channel_info->rvlc_prev_sf[bnds]);
} else {
ptr_aac_dec_channel_info->ptr_scale_factor[bnds] = ixheaacd_min32(
ptr_aac_dec_channel_info->rvlc_scf_fwd_arr[bnds],
ptr_aac_dec_channel_info->rvlc_scf_bwd_arr[bnds]);
}
break;
}
}
start_band = 0;
if ((group + 1) == conceal_group_max) end_band = conceal_max;
}
if (conceal_group_min == 0)
end_band = conceal_min;
else
end_band = ptr_rvlc->max_sfb_transmitted;
for (group = 0; group <= conceal_group_min; group++) {
for (band = 0; band < end_band; band++) {
bnds = 16 * group + band;
ptr_aac_dec_channel_info->ptr_scale_factor[bnds] =
ptr_aac_dec_channel_info->rvlc_scf_fwd_arr[bnds];
}
if ((group + 1) == conceal_group_min) end_band = conceal_min;
}
start_band = conceal_max + 1;
for (group = conceal_group_max; group < ptr_rvlc->num_wind_grps; group++) {
for (band = start_band; band < ptr_rvlc->max_sfb_transmitted; band++) {
bnds = 16 * group + band;
ptr_aac_dec_channel_info->ptr_scale_factor[bnds] =
ptr_aac_dec_channel_info->rvlc_scf_bwd_arr[bnds];
}
start_band = 0;
}
}
static VOID ixheaacd_calc_ref_val_fwd(
ia_rvlc_info_struct *ptr_rvlc,
ia_aac_dec_channel_info_struct *ptr_aac_dec_channel_info, WORD32 *ref_fwd,
WORD32 *ref_nrg_fwd, WORD32 *ref_scf_fwd) {
WORD32 band, bnds, group, start_band;
WORD32 id_is, id_nrg, id_scf;
WORD32 conceal_min, conceal_group_min;
WORD32 max_scf_bands;
if (ptr_aac_dec_channel_info->str_ics_info.window_sequence ==
EIGHT_SHORT_SEQUENCE)
max_scf_bands = 16;
else
max_scf_bands = 64;
conceal_min = ptr_rvlc->conceal_min % max_scf_bands;
conceal_group_min = ptr_rvlc->conceal_min / max_scf_bands;
id_is = id_nrg = id_scf = 1;
*ref_nrg_fwd = ptr_aac_dec_channel_info->global_gain - 90 - 256;
*ref_scf_fwd = ptr_aac_dec_channel_info->global_gain;
start_band = conceal_min - 1;
for (group = conceal_group_min; group >= 0; group--) {
for (band = start_band; band >= 0; band--) {
bnds = 16 * group + band;
switch (ptr_aac_dec_channel_info->ptr_code_book[bnds]) {
case ZERO_HCB:
break;
case INTENSITY_HCB:
case INTENSITY_HCB2:
if (id_is) {
*ref_fwd = ptr_aac_dec_channel_info->rvlc_scf_fwd_arr[bnds];
id_is = 0;
}
break;
case NOISE_HCB:
if (id_nrg) {
*ref_nrg_fwd = ptr_aac_dec_channel_info->rvlc_scf_fwd_arr[bnds];
id_nrg = 0;
}
break;
default:
if (id_scf) {
*ref_scf_fwd = ptr_aac_dec_channel_info->rvlc_scf_fwd_arr[bnds];
id_scf = 0;
}
break;
}
}
start_band = ptr_rvlc->max_sfb_transmitted - 1;
}
}
static VOID ixheaacd_calc_ref_val_bwd(
ia_rvlc_info_struct *ptr_rvlc,
ia_aac_dec_channel_info_struct *ptr_aac_dec_channel_info, WORD32 *ref_bwd,
WORD32 *ref_nrg_bwd, WORD32 *ref_scf_bwd) {
WORD32 band, bnds, group, start_band;
WORD32 id_is, id_nrg, id_scf;
WORD32 conceal_max, conceal_group_max;
WORD32 max_scf_bands;
if (ptr_aac_dec_channel_info->str_ics_info.window_sequence ==
EIGHT_SHORT_SEQUENCE)
max_scf_bands = 16;
else
max_scf_bands = 64;
conceal_max = ptr_rvlc->conceal_max % max_scf_bands;
conceal_group_max = ptr_rvlc->conceal_max / max_scf_bands;
id_is = id_nrg = id_scf = 1;
*ref_bwd = ptr_rvlc->dpcm_is_last_pos;
*ref_nrg_bwd = ptr_rvlc->rev_global_gain + ptr_rvlc->dpcm_noise_last_pos -
90 - 256 + ptr_rvlc->dpcm_noise_nrg;
*ref_scf_bwd = ptr_rvlc->rev_global_gain;
start_band = conceal_max + 1;
for (group = conceal_group_max; group < ptr_rvlc->num_wind_grps; group++) {
for (band = start_band; band < ptr_rvlc->max_sfb_transmitted; band++) {
bnds = 16 * group + band;
switch (ptr_aac_dec_channel_info->ptr_code_book[bnds]) {
case ZERO_HCB:
break;
case INTENSITY_HCB:
case INTENSITY_HCB2:
if (id_is) {
*ref_bwd = ptr_aac_dec_channel_info->rvlc_scf_bwd_arr[bnds];
id_is = 0;
}
break;
case NOISE_HCB:
if (id_nrg) {
*ref_nrg_bwd = ptr_aac_dec_channel_info->rvlc_scf_bwd_arr[bnds];
id_nrg = 0;
}
break;
default:
if (id_scf) {
*ref_scf_bwd = ptr_aac_dec_channel_info->rvlc_scf_bwd_arr[bnds];
id_scf = 0;
}
break;
}
}
start_band = 0;
}
}
VOID ixheaacd_bi_dir_est_lower_scf_cur_frame(
ia_aac_dec_channel_info_struct *ptr_aac_dec_channel_info) {
ia_rvlc_info_struct *ptr_rvlc = &ptr_aac_dec_channel_info->ptr_rvlc_info;
WORD32 band, bnds, start_band, end_band, group;
WORD32 conceal_min, conceal_max;
WORD32 conceal_group_min, conceal_group_max;
WORD32 max_scf_bands;
if (ptr_aac_dec_channel_info->str_ics_info.window_sequence ==
EIGHT_SHORT_SEQUENCE) {
max_scf_bands = 16;
} else {
max_scf_bands = 64;
}
if (ptr_rvlc->conceal_min == CONCEAL_MIN_INIT) ptr_rvlc->conceal_min = 0;
if (ptr_rvlc->conceal_max == CONCEAL_MAX_INIT)
ptr_rvlc->conceal_max =
(ptr_rvlc->num_wind_grps - 1) * 16 + ptr_rvlc->max_sfb_transmitted - 1;
conceal_min = ptr_rvlc->conceal_min % max_scf_bands;
conceal_group_min = ptr_rvlc->conceal_min / max_scf_bands;
conceal_max = ptr_rvlc->conceal_max % max_scf_bands;
conceal_group_max = ptr_rvlc->conceal_max / max_scf_bands;
if (ptr_rvlc->conceal_min == ptr_rvlc->conceal_max) {
WORD32 ref_fwd = 0, ref_nrg_fwd = 0, ref_scf_fwd = 0;
WORD32 ref_bwd = 0, ref_nrg_bwd = 0, ref_scf_bwd = 0;
bnds = ptr_rvlc->conceal_min;
ixheaacd_calc_ref_val_fwd(ptr_rvlc, ptr_aac_dec_channel_info, &ref_fwd,
&ref_nrg_fwd, &ref_scf_fwd);
ixheaacd_calc_ref_val_bwd(ptr_rvlc, ptr_aac_dec_channel_info, &ref_bwd,
&ref_nrg_bwd, &ref_scf_bwd);
switch (ptr_aac_dec_channel_info->ptr_code_book[bnds]) {
case ZERO_HCB:
break;
case INTENSITY_HCB:
case INTENSITY_HCB2:
if (ref_fwd < ref_bwd)
ptr_aac_dec_channel_info->ptr_scale_factor[bnds] = ref_fwd;
else
ptr_aac_dec_channel_info->ptr_scale_factor[bnds] = ref_bwd;
break;
case NOISE_HCB:
if (ref_nrg_fwd < ref_nrg_bwd)
ptr_aac_dec_channel_info->ptr_scale_factor[bnds] = ref_nrg_fwd;
else
ptr_aac_dec_channel_info->ptr_scale_factor[bnds] = ref_nrg_bwd;
break;
default:
if (ref_scf_fwd < ref_scf_bwd)
ptr_aac_dec_channel_info->ptr_scale_factor[bnds] = ref_scf_fwd;
else
ptr_aac_dec_channel_info->ptr_scale_factor[bnds] = ref_scf_bwd;
break;
}
} else {
ptr_aac_dec_channel_info->rvlc_scf_fwd_arr[ptr_rvlc->conceal_max] =
ptr_aac_dec_channel_info->rvlc_scf_bwd_arr[ptr_rvlc->conceal_max];
ptr_aac_dec_channel_info->rvlc_scf_bwd_arr[ptr_rvlc->conceal_min] =
ptr_aac_dec_channel_info->rvlc_scf_fwd_arr[ptr_rvlc->conceal_min];
start_band = conceal_min;
if (conceal_group_min == conceal_group_max)
end_band = conceal_max;
else
end_band = ptr_rvlc->max_sfb_transmitted - 1;
for (group = conceal_group_min; group <= conceal_group_max; group++) {
for (band = start_band; band <= end_band; band++) {
bnds = 16 * group + band;
if (ptr_aac_dec_channel_info->rvlc_scf_fwd_arr[bnds] <
ptr_aac_dec_channel_info->rvlc_scf_bwd_arr[bnds])
ptr_aac_dec_channel_info->ptr_scale_factor[bnds] =
ptr_aac_dec_channel_info->rvlc_scf_fwd_arr[bnds];
else
ptr_aac_dec_channel_info->ptr_scale_factor[bnds] =
ptr_aac_dec_channel_info->rvlc_scf_bwd_arr[bnds];
}
start_band = 0;
if ((group + 1) == conceal_group_max) end_band = conceal_max;
}
}
if (conceal_group_min == 0)
end_band = conceal_min;
else
end_band = ptr_rvlc->max_sfb_transmitted;
for (group = 0; group <= conceal_group_min; group++) {
for (band = 0; band < end_band; band++) {
bnds = 16 * group + band;
ptr_aac_dec_channel_info->ptr_scale_factor[bnds] =
ptr_aac_dec_channel_info->rvlc_scf_fwd_arr[bnds];
}
if ((group + 1) == conceal_group_min) end_band = conceal_min;
}
start_band = conceal_max + 1;
for (group = conceal_group_max; group < ptr_rvlc->num_wind_grps; group++) {
for (band = start_band; band < ptr_rvlc->max_sfb_transmitted; band++) {
bnds = 16 * group + band;
ptr_aac_dec_channel_info->ptr_scale_factor[bnds] =
ptr_aac_dec_channel_info->rvlc_scf_bwd_arr[bnds];
}
start_band = 0;
}
}
VOID ixheaacd_statistical_estimation(
ia_aac_dec_channel_info_struct *ptr_aac_dec_channel_info) {
ia_rvlc_info_struct *ptr_rvlc = &ptr_aac_dec_channel_info->ptr_rvlc_info;
WORD32 band, bnds, group;
WORD32 sum_fwd, sum_bwd;
WORD32 sum_nrg_fwd, sum_nrg_bwd;
WORD32 sum_scf_fwd, sum_scf_bwd;
WORD32 use_fwd, use_nrg_fwd, use_scf_fwd;
WORD32 max_scf_bands;
if (ptr_aac_dec_channel_info->str_ics_info.window_sequence ==
EIGHT_SHORT_SEQUENCE)
max_scf_bands = 16;
else
max_scf_bands = 64;
sum_fwd = sum_bwd = sum_nrg_fwd = sum_nrg_bwd = sum_scf_fwd = sum_scf_bwd = 0;
use_fwd = use_nrg_fwd = use_scf_fwd = 0;
for (group = 0; group < ptr_rvlc->num_wind_grps; group++) {
for (band = 0; band < ptr_rvlc->max_sfb_transmitted; band++) {
bnds = 16 * group + band;
switch (ptr_aac_dec_channel_info->ptr_code_book[bnds]) {
case ZERO_HCB:
break;
case INTENSITY_HCB:
case INTENSITY_HCB2:
sum_fwd += ptr_aac_dec_channel_info->rvlc_scf_fwd_arr[bnds];
sum_bwd += ptr_aac_dec_channel_info->rvlc_scf_bwd_arr[bnds];
break;
case NOISE_HCB:
sum_nrg_fwd += ptr_aac_dec_channel_info->rvlc_scf_fwd_arr[bnds];
sum_nrg_bwd += ptr_aac_dec_channel_info->rvlc_scf_bwd_arr[bnds];
break;
default:
sum_scf_fwd += ptr_aac_dec_channel_info->rvlc_scf_fwd_arr[bnds];
sum_scf_bwd += ptr_aac_dec_channel_info->rvlc_scf_bwd_arr[bnds];
break;
}
}
}
if (sum_fwd < sum_bwd) use_fwd = 1;
if (sum_nrg_fwd < sum_nrg_bwd) use_nrg_fwd = 1;
if (sum_scf_fwd < sum_scf_bwd) use_scf_fwd = 1;
for (group = 0; group < ptr_rvlc->num_wind_grps; group++) {
for (band = 0; band < ptr_rvlc->max_sfb_transmitted; band++) {
bnds = 16 * group + band;
switch (ptr_aac_dec_channel_info->ptr_code_book[bnds]) {
case ZERO_HCB:
break;
case INTENSITY_HCB:
case INTENSITY_HCB2:
if (use_fwd)
ptr_aac_dec_channel_info->ptr_scale_factor[bnds] =
ptr_aac_dec_channel_info->rvlc_scf_fwd_arr[bnds];
else
ptr_aac_dec_channel_info->ptr_scale_factor[bnds] =
ptr_aac_dec_channel_info->rvlc_scf_bwd_arr[bnds];
break;
case NOISE_HCB:
if (use_nrg_fwd)
ptr_aac_dec_channel_info->ptr_scale_factor[bnds] =
ptr_aac_dec_channel_info->rvlc_scf_fwd_arr[bnds];
else
ptr_aac_dec_channel_info->ptr_scale_factor[bnds] =
ptr_aac_dec_channel_info->rvlc_scf_bwd_arr[bnds];
break;
default:
if (use_scf_fwd)
ptr_aac_dec_channel_info->ptr_scale_factor[bnds] =
ptr_aac_dec_channel_info->rvlc_scf_fwd_arr[bnds];
else
ptr_aac_dec_channel_info->ptr_scale_factor[bnds] =
ptr_aac_dec_channel_info->rvlc_scf_bwd_arr[bnds];
break;
}
}
}
}
VOID ixheaacd_predictive_interpolation(
ia_aac_dec_channel_info_struct *ptr_aac_dec_channel_info,
ia_aac_dec_overlap_info *ptr_aac_dec_static_channel_info) {
ia_rvlc_info_struct *ptr_rvlc = &ptr_aac_dec_channel_info->ptr_rvlc_info;
WORD32 band, bnds, group;
WORD32 max_scf_bands;
WORD32 common_min;
if (ptr_aac_dec_channel_info->str_ics_info.window_sequence ==
EIGHT_SHORT_SEQUENCE)
max_scf_bands = 16;
else
max_scf_bands = 64;
for (group = 0; group < ptr_rvlc->num_wind_grps; group++) {
for (band = 0; band < ptr_rvlc->max_sfb_transmitted; band++) {
bnds = 16 * group + band;
switch (ptr_aac_dec_channel_info->ptr_code_book[bnds]) {
case ZERO_HCB:
ptr_aac_dec_channel_info->ptr_scale_factor[bnds] = 0;
break;
case INTENSITY_HCB:
case INTENSITY_HCB2:
if ((ptr_aac_dec_static_channel_info->rvlc_prev_cb[bnds] ==
INTENSITY_HCB) ||
(ptr_aac_dec_static_channel_info->rvlc_prev_cb[bnds] ==
INTENSITY_HCB2)) {
common_min = ixheaacd_min32(
ptr_aac_dec_channel_info->rvlc_scf_fwd_arr[bnds],
ptr_aac_dec_channel_info->rvlc_scf_bwd_arr[bnds]);
ptr_aac_dec_channel_info->ptr_scale_factor[bnds] = ixheaacd_min32(
common_min,
ptr_aac_dec_static_channel_info->rvlc_prev_sf[bnds]);
} else {
ptr_aac_dec_channel_info->ptr_scale_factor[bnds] = -110;
}
break;
case NOISE_HCB:
if (ptr_aac_dec_static_channel_info->rvlc_prev_cb[bnds] ==
NOISE_HCB) {
common_min = ixheaacd_min32(
ptr_aac_dec_channel_info->rvlc_scf_fwd_arr[bnds],
ptr_aac_dec_channel_info->rvlc_scf_bwd_arr[bnds]);
ptr_aac_dec_channel_info->ptr_scale_factor[bnds] = ixheaacd_min32(
common_min,
ptr_aac_dec_static_channel_info->rvlc_prev_sf[bnds]);
} else {
ptr_aac_dec_channel_info->ptr_scale_factor[bnds] = -110;
}
break;
default:
if ((ptr_aac_dec_static_channel_info->rvlc_prev_cb[bnds] !=
ZERO_HCB) &&
(ptr_aac_dec_static_channel_info->rvlc_prev_cb[bnds] !=
NOISE_HCB) &&
(ptr_aac_dec_static_channel_info->rvlc_prev_cb[bnds] !=
INTENSITY_HCB) &&
(ptr_aac_dec_static_channel_info->rvlc_prev_cb[bnds] !=
INTENSITY_HCB2)) {
common_min = ixheaacd_min32(
ptr_aac_dec_channel_info->rvlc_scf_fwd_arr[bnds],
ptr_aac_dec_channel_info->rvlc_scf_bwd_arr[bnds]);
ptr_aac_dec_channel_info->ptr_scale_factor[bnds] = ixheaacd_min32(
common_min,
ptr_aac_dec_static_channel_info->rvlc_prev_sf[bnds]);
} else {
ptr_aac_dec_channel_info->ptr_scale_factor[bnds] = 0;
}
break;
}
}
}
}
static VOID ixheaacd_rvlc_final_error_detection(
ia_aac_dec_channel_info_struct *ptr_aac_dec_channel_info,
ia_aac_dec_overlap_info *ptr_aac_dec_static_channel_info) {
ia_rvlc_info_struct *ptr_rvlc = &ptr_aac_dec_channel_info->ptr_rvlc_info;
UWORD8 err_status_complete = 0;
UWORD8 err_status_length_fwd = 0;
UWORD8 err_status_length_bwd = 0;
UWORD8 err_status_length_escape = 0;
UWORD8 err_status_first_scf = 0;
UWORD8 err_status_last_scf = 0;
UWORD8 err_status_first_nrg = 0;
UWORD8 err_status_last_nrg = 0;
UWORD8 err_status_first_is = 0;
UWORD8 err_status_last_is = 0;
UWORD8 err_status_forbidden_cw_fwd = 0;
UWORD8 err_status_forbidden_cw_bwd = 0;
UWORD8 err_status_num_escapes_fwd = 0;
UWORD8 err_status_num_escapes_bwd = 0;
UWORD8 conceal_status = 1;
UWORD8 current_block_type;
ptr_aac_dec_channel_info->rvlc_curr_sf_flag = 1;
if (ptr_rvlc->rvlc_err_log & RVLC_ERROR_FORBIDDEN_CW_DETECTED_FWD)
err_status_forbidden_cw_fwd = 1;
if (ptr_rvlc->rvlc_err_log & RVLC_ERROR_FORBIDDEN_CW_DETECTED_BWD)
err_status_forbidden_cw_bwd = 1;
if (ptr_rvlc->rvlc_sf_fwd_len) err_status_length_fwd = 1;
if (ptr_rvlc->rvlc_sf_bwd_len) err_status_length_bwd = 1;
if (ptr_rvlc->sf_esc_present)
if (ptr_rvlc->rvlc_esc_len) err_status_length_escape = 1;
if (ptr_rvlc->sf_used) {
if (ptr_rvlc->firt_scale_fac != (ptr_aac_dec_channel_info->global_gain))
err_status_first_scf = 1;
if (ptr_rvlc->last_scale_fac != (ptr_rvlc->rev_global_gain))
err_status_last_scf = 1;
}
if (ptr_rvlc->noise_used) {
if (ptr_rvlc->first_nrg != (ptr_aac_dec_channel_info->global_gain +
ptr_rvlc->dpcm_noise_nrg - 90 - 256))
err_status_first_nrg = 1;
if (ptr_rvlc->last_nrg !=
(ptr_rvlc->rev_global_gain + ptr_rvlc->dpcm_noise_last_pos - 90 - 256))
err_status_last_nrg = 1;
}
if (ptr_rvlc->intensity_used) {
if (ptr_rvlc->is_first != 0) err_status_first_is = 1;
if (ptr_rvlc->is_last != (ptr_rvlc->dpcm_is_last_pos))
err_status_last_is = 1;
}
if ((ptr_rvlc->num_fwd_esc_words_decoded !=
ptr_rvlc->num_esc_words_decoded) &&
(ptr_rvlc->conceal_max == CONCEAL_MAX_INIT)) {
err_status_num_escapes_fwd = 1;
}
if ((ptr_rvlc->num_bwd_esc_words_decoded !=
ptr_rvlc->num_esc_words_decoded) &&
(ptr_rvlc->conceal_min == CONCEAL_MIN_INIT)) {
err_status_num_escapes_bwd = 1;
}
if (err_status_length_escape ||
(((ptr_rvlc->conceal_max == CONCEAL_MAX_INIT) &&
(ptr_rvlc->num_fwd_esc_words_decoded !=
ptr_rvlc->num_esc_words_decoded) &&
(err_status_last_scf || err_status_last_nrg || err_status_last_is))
&&
((ptr_rvlc->conceal_min == CONCEAL_MIN_INIT) &&
(ptr_rvlc->num_bwd_esc_words_decoded !=
ptr_rvlc->num_esc_words_decoded) &&
(err_status_first_scf || err_status_first_nrg ||
err_status_first_is))) ||
((ptr_rvlc->conceal_max == CONCEAL_MAX_INIT) &&
((ptr_rvlc->rev_global_gain - ptr_rvlc->last_scale_fac) < -15)) ||
((ptr_rvlc->conceal_min == CONCEAL_MIN_INIT) &&
((ptr_aac_dec_channel_info->global_gain - ptr_rvlc->firt_scale_fac) <
-15))) {
if ((ptr_rvlc->conceal_max == CONCEAL_MAX_INIT) ||
(ptr_rvlc->conceal_min == CONCEAL_MIN_INIT)) {
ptr_rvlc->conceal_max = 0;
ptr_rvlc->conceal_min =
ixheaacd_max32(0, (ptr_rvlc->num_wind_grps - 1) * 16 +
ptr_rvlc->max_sfb_transmitted - 1);
} else {
ptr_rvlc->conceal_max =
ixheaacd_min32(ptr_rvlc->conceal_max, ptr_rvlc->conceal_max_esc);
ptr_rvlc->conceal_min =
ixheaacd_max32(ptr_rvlc->conceal_min, ptr_rvlc->conceal_min_esc);
}
}
err_status_complete =
err_status_last_scf || err_status_first_scf || err_status_last_nrg ||
err_status_first_nrg || err_status_last_is || err_status_first_is ||
err_status_forbidden_cw_fwd || err_status_forbidden_cw_bwd ||
err_status_length_fwd || err_status_length_bwd ||
err_status_length_escape || err_status_num_escapes_fwd ||
err_status_num_escapes_bwd;
current_block_type =
(ptr_aac_dec_channel_info->str_ics_info.window_sequence ==
EIGHT_SHORT_SEQUENCE)
? 0
: 1;
if (!err_status_complete) {
WORD32 band;
WORD32 group;
WORD32 bnds;
WORD32 last_sfb_idx;
last_sfb_idx = (ptr_rvlc->num_wind_grps > 1) ? 16 : 64;
for (group = 0; group < ptr_rvlc->num_wind_grps; group++) {
for (band = 0; band < ptr_rvlc->max_sfb_transmitted; band++) {
bnds = 16 * group + band;
ptr_aac_dec_channel_info->ptr_scale_factor[bnds] =
ptr_aac_dec_static_channel_info->rvlc_prev_sf[bnds] =
ptr_aac_dec_channel_info->rvlc_scf_fwd_arr[bnds];
}
}
for (group = 0; group < ptr_rvlc->num_wind_grps; group++) {
for (band = 0; band < ptr_rvlc->max_sfb_transmitted; band++) {
bnds = 16 * group + band;
ptr_aac_dec_static_channel_info->rvlc_prev_cb[bnds] =
ptr_aac_dec_channel_info->ptr_code_book[bnds];
}
for (; band < last_sfb_idx; band++) {
bnds = 16 * group + band;
ptr_aac_dec_static_channel_info->rvlc_prev_cb[bnds] = ZERO_HCB;
}
}
} else {
WORD32 band;
WORD32 group;
if (((ptr_rvlc->conceal_min != CONCEAL_MIN_INIT) ||
(ptr_rvlc->conceal_max != CONCEAL_MAX_INIT)) &&
(ptr_rvlc->conceal_min <= ptr_rvlc->conceal_max) &&
(ptr_aac_dec_static_channel_info->rvlc_prev_blk_type ==
current_block_type) &&
ptr_aac_dec_static_channel_info->rvlc_prev_sf_ok &&
ptr_rvlc->sf_concealment && conceal_status) {
ixheaacd_bi_dir_est_scf_prev_frame_reference(
ptr_aac_dec_channel_info, ptr_aac_dec_static_channel_info);
conceal_status = 0;
}
if ((ptr_rvlc->conceal_min <= ptr_rvlc->conceal_max) &&
((ptr_rvlc->conceal_min != CONCEAL_MIN_INIT) ||
(ptr_rvlc->conceal_max != CONCEAL_MAX_INIT)) &&
!(ptr_aac_dec_static_channel_info->rvlc_prev_sf_ok &&
ptr_rvlc->sf_concealment &&
(ptr_aac_dec_static_channel_info->rvlc_prev_blk_type ==
current_block_type)) &&
conceal_status) {
ixheaacd_bi_dir_est_lower_scf_cur_frame(ptr_aac_dec_channel_info);
conceal_status = 0;
}
if ((ptr_rvlc->conceal_min <= ptr_rvlc->conceal_max) &&
((err_status_last_scf && err_status_first_scf) ||
(err_status_last_nrg && err_status_first_nrg) ||
(err_status_last_is && err_status_first_is)) &&
!(err_status_forbidden_cw_fwd || err_status_forbidden_cw_bwd ||
err_status_length_escape) &&
conceal_status) {
ixheaacd_statistical_estimation(ptr_aac_dec_channel_info);
conceal_status = 0;
}
if ((ptr_rvlc->conceal_min <= ptr_rvlc->conceal_max) &&
ptr_aac_dec_static_channel_info->rvlc_prev_sf_ok &&
ptr_rvlc->sf_concealment &&
(ptr_aac_dec_static_channel_info->rvlc_prev_blk_type ==
current_block_type) &&
conceal_status) {
ixheaacd_predictive_interpolation(ptr_aac_dec_channel_info,
ptr_aac_dec_static_channel_info);
conceal_status = 0;
}
if (conceal_status) {
for (group = 0; group < ptr_rvlc->num_wind_grps; group++) {
for (band = 0; band < ptr_rvlc->max_sfb_transmitted; band++) {
ptr_aac_dec_channel_info->ptr_scale_factor[16 * group + band] = 0;
}
}
ptr_aac_dec_channel_info->rvlc_curr_sf_flag = 0;
}
}
}
IA_ERRORCODE ixheaacd_rvlc_dec(
ia_aac_dec_channel_info_struct *ptr_aac_dec_channel_info,
ia_aac_dec_overlap_info *ptr_aac_dec_static_channel_info,
ia_bit_buf_struct *it_bit_buff) {
ia_rvlc_info_struct *ptr_rvlc = &ptr_aac_dec_channel_info->ptr_rvlc_info;
ia_bit_buf_struct saved_it_bit_buff;
IA_ERRORCODE error_code = 0;
error_code =
ixheaacd_rvlc_init(ptr_rvlc, ptr_aac_dec_channel_info, it_bit_buff);
if (error_code) return error_code;
ixheaacd_bitbuf_checkpoint(*it_bit_buff, saved_it_bit_buff);
if (ptr_rvlc->sf_esc_present)
ixheaacd_rvlc_decode_escape(
ptr_rvlc, ptr_aac_dec_channel_info->rvlc_scf_esc_arr, it_bit_buff);
ixheaacd_rvlc_decode_forward(ptr_rvlc, ptr_aac_dec_channel_info, it_bit_buff);
ixheaacd_rvlc_decode_backward(ptr_rvlc, ptr_aac_dec_channel_info,
it_bit_buff);
ixheaacd_rvlc_final_error_detection(ptr_aac_dec_channel_info,
ptr_aac_dec_static_channel_info);
ptr_aac_dec_channel_info->rvlc_intensity_used = ptr_rvlc->intensity_used;
ptr_aac_dec_channel_info->str_pns_info.pns_active = ptr_rvlc->noise_used;
ixheaacd_bitbuf_restore(*it_bit_buff, saved_it_bit_buff);
return error_code;
}
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