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android13/external/libxaac/decoder/ixheaacd_ps_bitdec.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_basic_op.h"
#include "ixheaacd_intrinsics.h"
#include "ixheaacd_bitbuffer.h"
#include "ixheaacd_sbrdecsettings.h"
#include "ixheaacd_sbr_scale.h"
#include "ixheaacd_lpp_tran.h"
#include "ixheaacd_env_extr_part.h"
#include "ixheaacd_sbr_rom.h"
#include "ixheaacd_hybrid.h"
#include "ixheaacd_ps_dec.h"
#include "ixheaacd_env_extr.h"
#include "ixheaacd_ps_bitdec.h"
const WORD16 ixheaacd_num_bands[3] = {10, 20, 34};
static WORD32 ixheaacd_clamp(WORD32 i, WORD16 min, WORD16 max) {
WORD32 result = i;
if (i < min) {
result = min;
} else {
if (i > max) {
result = max;
}
}
return result;
}
WORD16 ixheaacd_divideby2(WORD op) {
FLAG sign = (op < 0);
if (sign) {
op = -(op);
}
op = (op >> 1);
if (sign) {
op = -op;
}
return (WORD16)op;
}
WORD16 ixheaacd_divideby3(WORD op) {
WORD16 temp, ret;
FLAG sign = (op < 0);
if (sign) {
op = -(op);
}
temp = (WORD16)(op << 2);
temp = ixheaacd_mult16_shl(temp, 0x2aab);
ret = (temp >> 2);
if (sign) {
ret = -(ret);
}
return (WORD16)ret;
}
VOID ixheaacd_decode_ps_data(ia_ps_dec_struct *ptr_ps_dec) {
WORD e, i, temp;
WORD16 iid_mode = (WORD16)((ptr_ps_dec->iid_mode) ? 1 : 2);
WORD16 icc_mode = (WORD16)((ptr_ps_dec->icc_mode) ? 1 : 2);
WORD16 num_iid_levels =
(WORD16)(ptr_ps_dec->iid_quant ? NUM_IID_LEVELS_FINE : NUM_IID_LEVELS);
if (!ptr_ps_dec->ps_data_present) {
ptr_ps_dec->num_env = 0;
}
for (e = 0; e < ptr_ps_dec->num_env; e++) {
WORD16 *p_iid_par_prev;
WORD16 *p_icc_par_prev;
if (e == 0) {
p_iid_par_prev = ptr_ps_dec->iid_par_prev;
p_icc_par_prev = ptr_ps_dec->icc_par_prev;
} else {
p_iid_par_prev = ptr_ps_dec->iid_par_table[e - 1];
p_icc_par_prev = ptr_ps_dec->icc_par_table[e - 1];
}
if (ptr_ps_dec->enable_iid) {
if (ptr_ps_dec->iid_dt[e]) {
for (i = 0; i < ixheaacd_num_bands[ptr_ps_dec->iid_mode]; i++) {
temp =
ixheaacd_add16(*p_iid_par_prev, ptr_ps_dec->iid_par_table[e][i]);
ptr_ps_dec->iid_par_table[e][i] = ixheaacd_clamp(
temp, ixheaacd_negate16(num_iid_levels), num_iid_levels);
p_iid_par_prev += iid_mode;
}
} else {
ptr_ps_dec->iid_par_table[e][0] =
ixheaacd_clamp(ptr_ps_dec->iid_par_table[e][0],
ixheaacd_negate16(num_iid_levels), num_iid_levels);
for (i = 1; i < ixheaacd_num_bands[ptr_ps_dec->iid_mode]; i++) {
temp = ixheaacd_add16(ptr_ps_dec->iid_par_table[e][i - 1],
ptr_ps_dec->iid_par_table[e][i]);
ptr_ps_dec->iid_par_table[e][i] = ixheaacd_clamp(
temp, ixheaacd_negate16(num_iid_levels), num_iid_levels);
}
}
} else {
memset(ptr_ps_dec->iid_par_table[e], 0,
sizeof(WORD16) * ixheaacd_num_bands[ptr_ps_dec->iid_mode]);
}
if (iid_mode == 2) {
for (i = (ixheaacd_num_bands[ptr_ps_dec->iid_mode] * iid_mode - 1);
i != 0; i--) {
ptr_ps_dec->iid_par_table[e][i] =
ptr_ps_dec->iid_par_table[e][ixheaacd_shr32(i, 1)];
}
}
if (ptr_ps_dec->enable_icc) {
if (ptr_ps_dec->icc_dt[e]) {
for (i = 0; i < ixheaacd_num_bands[ptr_ps_dec->icc_mode]; i++) {
temp =
ixheaacd_add16(*p_icc_par_prev, ptr_ps_dec->icc_par_table[e][i]);
ptr_ps_dec->icc_par_table[e][i] =
ixheaacd_clamp(temp, 0, (WORD16)(NUM_ICC_LEVELS - 1));
p_icc_par_prev += icc_mode;
}
} else {
ptr_ps_dec->icc_par_table[e][0] = ixheaacd_clamp(
ptr_ps_dec->icc_par_table[e][0], 0, (WORD16)(NUM_ICC_LEVELS - 1));
for (i = 1; i < ixheaacd_num_bands[ptr_ps_dec->icc_mode]; i++) {
temp = ixheaacd_add16(ptr_ps_dec->icc_par_table[e][i - 1],
ptr_ps_dec->icc_par_table[e][i]);
ptr_ps_dec->icc_par_table[e][i] =
ixheaacd_clamp(temp, 0, (WORD16)(NUM_ICC_LEVELS - 1));
}
}
} else {
memset(ptr_ps_dec->icc_par_table[e], 0,
sizeof(WORD16) * ixheaacd_num_bands[ptr_ps_dec->icc_mode]);
}
if (icc_mode == 2) {
for (i = (ixheaacd_num_bands[ptr_ps_dec->icc_mode] * icc_mode - 1);
i != 0; i--) {
ptr_ps_dec->icc_par_table[e][i] =
ptr_ps_dec->icc_par_table[e][ixheaacd_shr32(i, 1)];
}
}
}
if (ptr_ps_dec->num_env == 0) {
ptr_ps_dec->num_env = 1;
if (ptr_ps_dec->enable_iid) {
memcpy(ptr_ps_dec->iid_par_table[0], ptr_ps_dec->iid_par_prev,
sizeof(WORD16) * NUM_BANDS_FINE);
} else {
memset(ptr_ps_dec->iid_par_table[0], 0, sizeof(WORD16) * NUM_BANDS_FINE);
}
if (ptr_ps_dec->enable_icc) {
memcpy(ptr_ps_dec->icc_par_table[0], ptr_ps_dec->icc_par_prev,
sizeof(WORD16) * NUM_BANDS_FINE);
} else {
memset(ptr_ps_dec->icc_par_table[0], 0, sizeof(WORD16) * NUM_BANDS_FINE);
}
}
memcpy(ptr_ps_dec->iid_par_prev,
ptr_ps_dec->iid_par_table[ptr_ps_dec->num_env - 1],
sizeof(WORD16) * NUM_BANDS_FINE);
memcpy(ptr_ps_dec->icc_par_prev,
ptr_ps_dec->icc_par_table[ptr_ps_dec->num_env - 1],
sizeof(WORD16) * NUM_BANDS_FINE);
ptr_ps_dec->ps_data_present = 0;
if (ptr_ps_dec->frame_class == 0) {
WORD env_count;
WORD16 shift = 0;
switch (ptr_ps_dec->num_env) {
case 1:
shift = 0;
break;
case 2:
shift = 1;
break;
case 4:
shift = 2;
break;
}
ptr_ps_dec->border_position[0] = 0;
env_count = 0;
for (e = 1; e < ptr_ps_dec->num_env; e++) {
env_count = add_d(env_count, MAX_NUM_COLUMNS);
ptr_ps_dec->border_position[e] = (WORD16)(env_count >> shift);
}
ptr_ps_dec->border_position[ptr_ps_dec->num_env] = MAX_NUM_COLUMNS;
} else {
ptr_ps_dec->border_position[0] = 0;
if (ptr_ps_dec->border_position[ptr_ps_dec->num_env] < MAX_NUM_COLUMNS) {
ptr_ps_dec->num_env++;
add_d(ptr_ps_dec->num_env, 1);
ptr_ps_dec->border_position[ptr_ps_dec->num_env] = MAX_NUM_COLUMNS;
memcpy(ptr_ps_dec->iid_par_table[ptr_ps_dec->num_env - 1],
ptr_ps_dec->iid_par_table[ptr_ps_dec->num_env - 2],
sizeof(WORD16) * NUM_BANDS_FINE);
memcpy(ptr_ps_dec->icc_par_table[ptr_ps_dec->num_env - 1],
ptr_ps_dec->icc_par_table[ptr_ps_dec->num_env - 2],
sizeof(WORD16) * NUM_BANDS_FINE);
}
for (e = 1; e < ptr_ps_dec->num_env; e++) {
WORD threshold;
threshold = sub_d(MAX_NUM_COLUMNS, sub_d(ptr_ps_dec->num_env, e));
if (ptr_ps_dec->border_position[e] > threshold) {
ptr_ps_dec->border_position[e] = threshold;
} else {
threshold = add_d(ptr_ps_dec->border_position[e - 1], 1);
if (ptr_ps_dec->border_position[e] < threshold) {
ptr_ps_dec->border_position[e] = threshold;
}
}
}
}
for (e = 0; e < ptr_ps_dec->num_env; e++) {
if (ptr_ps_dec->iid_mode == 2)
ixheaacd_map_34_params_to_20(ptr_ps_dec->iid_par_table[e]);
if (ptr_ps_dec->icc_mode == 2)
ixheaacd_map_34_params_to_20(ptr_ps_dec->icc_par_table[e]);
}
}
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