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android13/external/libxaac/decoder/ixheaacd_stereo.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 "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_bitbuffer.h"
#include "ixheaacd_common_rom.h"
#include "ixheaacd_basic_funcs.h"
#include "ixheaacd_basic_op.h"
#include "ixheaacd_intrinsics.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_channel.h"
#include "ixheaacd_drc_dec.h"
#include "ixheaacd_audioobjtypes.h"
#include "ixheaacd_stereo.h"
VOID ixheaacd_ms_stereo_process(
ia_aac_dec_channel_info_struct *ptr_aac_dec_channel_info[2],
ia_aac_dec_tables_struct *ptr_aac_tables)
{
WORD32 win_grp, grp_len, k;
WORD32 *l_spec = ptr_aac_dec_channel_info[LEFT]->ptr_spec_coeff;
WORD32 *r_spec = ptr_aac_dec_channel_info[RIGHT]->ptr_spec_coeff;
WORD8 *ptr_group_len =
ptr_aac_dec_channel_info[LEFT]->str_ics_info.window_group_length;
const WORD8 *ptr_sfb_width =
ptr_aac_tables
->str_aac_sfb_info[ptr_aac_dec_channel_info[RIGHT]
->str_ics_info.window_sequence]
.sfb_width;
UWORD8 *ptr_ms_used =
&ptr_aac_dec_channel_info[LEFT]->pstr_stereo_info->ms_used[0][0];
for (win_grp = 0;
win_grp < ptr_aac_dec_channel_info[LEFT]->str_ics_info.num_window_groups;
win_grp++) {
for (grp_len = 0; grp_len < ptr_group_len[win_grp]; grp_len++) {
WORD32 sfb;
WORD32 ixheaacd_drc_offset = 0;
for (sfb = 0; sfb < ptr_aac_dec_channel_info[LEFT]->str_ics_info.max_sfb;
sfb++) {
ixheaacd_drc_offset += ptr_sfb_width[sfb];
if (*ptr_ms_used++) {
for (k = 0; k < ptr_sfb_width[sfb]; k = k + 2) {
WORD32 left_coef = *l_spec;
WORD32 right_coef = *r_spec;
WORD32 left_coef2 = *(l_spec + 1);
WORD32 right_coef2 = *(r_spec + 1);
*l_spec++ = ixheaacd_add32_sat(left_coef, right_coef);
*r_spec++ = ixheaacd_sub32_sat(left_coef, right_coef);
*l_spec++ = ixheaacd_add32_sat(left_coef2, right_coef2);
*r_spec++ = ixheaacd_sub32_sat(left_coef2, right_coef2);
}
} else {
l_spec += ptr_sfb_width[sfb];
r_spec += ptr_sfb_width[sfb];
}
}
ptr_ms_used -= ptr_aac_dec_channel_info[LEFT]->str_ics_info.max_sfb;
l_spec = l_spec + 128 - ixheaacd_drc_offset;
r_spec = r_spec + 128 - ixheaacd_drc_offset;
}
ptr_ms_used += JOINT_STEREO_MAX_BANDS;
}
}
static PLATFORM_INLINE WORD32 ixheaacd_mult32x16in32l(WORD32 a, WORD32 b) {
WORD32 result;
WORD64 temp_result;
temp_result = (WORD64)a * (WORD64)b;
result = (WORD32)(temp_result >> 16);
return (result);
}
VOID ixheaacd_intensity_stereo_process(
ia_aac_dec_channel_info_struct *ptr_aac_dec_channel_info[2],
ia_aac_dec_tables_struct *ptr_aac_tables, WORD32 object_type,
WORD32 aac_sf_data_resil_flag) {
UWORD8 *ptr_ms_used =
&ptr_aac_dec_channel_info[LEFT]->pstr_stereo_info->ms_used[0][0];
WORD8 *ptr_code_book = &ptr_aac_dec_channel_info[RIGHT]->ptr_code_book[0];
WORD16 *ptr_scale_factor =
&ptr_aac_dec_channel_info[RIGHT]->ptr_scale_factor[0];
WORD32 *r_spec = &ptr_aac_dec_channel_info[RIGHT]->ptr_spec_coeff[0];
WORD32 *l_spec = &ptr_aac_dec_channel_info[LEFT]->ptr_spec_coeff[0];
WORD8 *ptr_group_len =
ptr_aac_dec_channel_info[RIGHT]->str_ics_info.window_group_length;
const WORD8 *ptr_sfb_width =
ptr_aac_tables
->str_aac_sfb_info[ptr_aac_dec_channel_info[RIGHT]
->str_ics_info.window_sequence]
.sfb_width;
WORD32 *ptr_scale_table = ptr_aac_tables->pstr_block_tables->scale_table;
WORD32 win_grp, grp_len, k;
for (win_grp = 0;
win_grp <
ptr_aac_dec_channel_info[RIGHT]->str_ics_info.num_window_groups;
win_grp++) {
for (grp_len = 0; grp_len < ptr_group_len[win_grp]; grp_len++) {
WORD32 sfb;
WORD32 ixheaacd_drc_offset = 0;
for (sfb = 0; sfb < ptr_aac_dec_channel_info[RIGHT]->str_ics_info.max_sfb;
sfb++) {
WORD8 code_book = ptr_code_book[sfb];
ixheaacd_drc_offset += ptr_sfb_width[sfb];
if (((code_book >= INTENSITY_HCB2) &&
((object_type != AOT_ER_AAC_ELD) &&
(object_type != AOT_ER_AAC_LD))) ||
(((code_book == INTENSITY_HCB2) || (code_book == INTENSITY_HCB)) &&
((object_type == AOT_ER_AAC_ELD) ||
(object_type == AOT_ER_AAC_LD))))
{
WORD32 sfb_factor, scale;
WORD32 scf_exp;
sfb_factor = (ptr_scale_factor[sfb]);
if (aac_sf_data_resil_flag) sfb_factor = -sfb_factor;
scf_exp = (sfb_factor >> 2);
scale = *(ptr_scale_table + (sfb_factor & 3));
if (!((ptr_ms_used[sfb]) ^ (code_book & 0x1))) {
scale = ixheaacd_negate32(scale);
}
scf_exp = -(scf_exp + 2);
for (k = 0; k < ptr_sfb_width[sfb]; k++) {
WORD32 temp, shift_val;
temp = *l_spec++;
shift_val = ixheaacd_norm32(temp);
temp = ixheaacd_shl32(temp, shift_val);
temp = ixheaacd_mult32x16in32l(temp, scale);
shift_val = shift_val + scf_exp;
if (shift_val < 0) {
temp = ixheaacd_shl32_sat(temp, -shift_val);
} else {
temp = ixheaacd_shr32(temp, shift_val);
}
*r_spec++ = temp;
}
} else {
l_spec += ptr_sfb_width[sfb];
r_spec += ptr_sfb_width[sfb];
}
}
l_spec += 128 - ixheaacd_drc_offset;
r_spec += 128 - ixheaacd_drc_offset;
}
ptr_ms_used += 64;
ptr_code_book += 16;
ptr_scale_factor += 16;
}
}
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