You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
210 lines
6.5 KiB
210 lines
6.5 KiB
/******************************************************************************
|
|
* *
|
|
* 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_type_def.h"
|
|
#include "ixheaacd_sbr_common.h"
|
|
#include "ixheaacd_bitbuffer.h"
|
|
#include "ixheaacd_defines.h"
|
|
#include "ixheaacd_aac_rom.h"
|
|
|
|
#include "ixheaacd_sbrdecsettings.h"
|
|
#include "ixheaacd_env_extr_part.h"
|
|
#include "ixheaacd_sbr_rom.h"
|
|
|
|
#include "ixheaacd_common_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_channel.h"
|
|
|
|
#include "ixheaacd_audioobjtypes.h"
|
|
#include "ixheaacd_memory_standards.h"
|
|
#include "ixheaacd_adts.h"
|
|
#include "ixheaacd_audioobjtypes.h"
|
|
#include "ixheaacd_latmdemux.h"
|
|
#include "ixheaacd_aacdec.h"
|
|
|
|
#include "ixheaacd_mps_polyphase.h"
|
|
#include "ixheaacd_config.h"
|
|
#include "ixheaacd_mps_dec.h"
|
|
|
|
#include "ixheaacd_struct_def.h"
|
|
#include "ixheaacd_error_codes.h"
|
|
|
|
#include "ixheaacd_adts_crc_check.h"
|
|
|
|
VOID ixheaacd_adts_crc_open(ia_adts_crc_info_struct *ptr_adts_crc_info) {
|
|
WORD32 i, j;
|
|
UWORD16 val;
|
|
|
|
ptr_adts_crc_info->no_reg = 0;
|
|
ptr_adts_crc_info->crc_active = 0;
|
|
|
|
for (i = 0; i <= 255; ++i) {
|
|
for (val = i << 8, j = 8; --j >= 0;) {
|
|
val = (val & 0x8000) ? (val << 1) ^ 0x8005 : val << 1;
|
|
}
|
|
|
|
ptr_adts_crc_info->crc_lookup[i] = val;
|
|
}
|
|
}
|
|
|
|
VOID ixheaacd_copy_bit_buf_state(
|
|
ia_bit_buf_struct *it_bit_buff_src,
|
|
ia_crc_bit_buf_struct_handle it_crc_bit_buff_dst) {
|
|
it_crc_bit_buff_dst->ptr_bit_buf_base = it_bit_buff_src->ptr_bit_buf_base;
|
|
it_crc_bit_buff_dst->ptr_bit_buf_end = it_bit_buff_src->ptr_bit_buf_end;
|
|
it_crc_bit_buff_dst->ptr_read_next = it_bit_buff_src->ptr_read_next;
|
|
it_crc_bit_buff_dst->bit_pos = it_bit_buff_src->bit_pos;
|
|
it_crc_bit_buff_dst->cnt_bits = it_bit_buff_src->cnt_bits;
|
|
it_crc_bit_buff_dst->size = it_bit_buff_src->size;
|
|
}
|
|
|
|
WORD32 ixheaacd_adts_crc_start_reg(ia_adts_crc_info_struct *ptr_adts_crc_info,
|
|
ia_bit_buf_struct *it_bit_buff_src,
|
|
WORD32 no_bits) {
|
|
UWORD32 no_bytes;
|
|
|
|
ptr_adts_crc_info->str_crc_reg_data[ptr_adts_crc_info->no_reg].bit_cnt = 0;
|
|
ptr_adts_crc_info->str_crc_reg_data[ptr_adts_crc_info->no_reg].max_bits =
|
|
no_bits;
|
|
|
|
if (no_bits < 0) {
|
|
no_bits = -no_bits;
|
|
}
|
|
|
|
if (no_bits == 0) {
|
|
no_bits = 16 << 3;
|
|
}
|
|
|
|
no_bytes = no_bits >> 3;
|
|
|
|
if (no_bytes << 3 < (UWORD32)no_bits) {
|
|
no_bytes++;
|
|
}
|
|
|
|
ptr_adts_crc_info->str_crc_reg_data[ptr_adts_crc_info->no_reg].buf_size =
|
|
no_bytes;
|
|
ptr_adts_crc_info->str_crc_reg_data[ptr_adts_crc_info->no_reg].active = 1;
|
|
|
|
ixheaacd_copy_bit_buf_state(
|
|
it_bit_buff_src,
|
|
&(ptr_adts_crc_info->str_crc_reg_data[ptr_adts_crc_info->no_reg]
|
|
.str_bit_buf));
|
|
|
|
ptr_adts_crc_info->no_reg += 1;
|
|
|
|
return (ptr_adts_crc_info->no_reg - 1);
|
|
}
|
|
|
|
VOID ixheaacd_adts_crc_end_reg(ia_adts_crc_info_struct *ptr_adts_crc_info,
|
|
ia_bit_buf_struct *it_bit_buff_src, WORD32 reg) {
|
|
ptr_adts_crc_info->str_crc_reg_data[reg].active = 0;
|
|
ptr_adts_crc_info->str_crc_reg_data[reg].bit_buf_cnt =
|
|
ptr_adts_crc_info->str_crc_reg_data[reg].str_bit_buf.cnt_bits -
|
|
it_bit_buff_src->cnt_bits;
|
|
}
|
|
|
|
VOID ixheaacd_adts_crc_fast_crc(ia_adts_crc_info_struct *ptr_adts_crc_info,
|
|
UWORD16 *crc_reg, UWORD8 feed) {
|
|
*crc_reg =
|
|
(*crc_reg << 8) ^ ptr_adts_crc_info->crc_lookup[(*crc_reg >> 8) ^ feed];
|
|
}
|
|
|
|
VOID ixheaacd_adts_crc_slow_crc(UWORD16 *crc_reg, UWORD8 feed,
|
|
UWORD32 no_bits) {
|
|
UWORD32 i;
|
|
UWORD16 tmp;
|
|
for (i = 0; i < no_bits; i++) {
|
|
tmp = (feed & (1 << (7 - i))) >> (7 - i);
|
|
tmp ^= (*crc_reg & (1 << 15)) >> 15;
|
|
tmp *= 32773;
|
|
*crc_reg <<= 1;
|
|
*crc_reg ^= tmp;
|
|
}
|
|
}
|
|
|
|
WORD32 ixheaacd_adts_crc_check_crc(ia_adts_crc_info_struct *ptr_adts_crc_info) {
|
|
WORD32 error_code = AAC_DEC_OK;
|
|
UWORD16 crc = 65535;
|
|
WORD32 reg;
|
|
ia_crc_reg_data_struct *ptr_reg_data;
|
|
|
|
for (reg = 0; reg < ptr_adts_crc_info->no_reg; reg++) {
|
|
UWORD8 bits;
|
|
UWORD32 bits_remaining;
|
|
|
|
ptr_reg_data = &ptr_adts_crc_info->str_crc_reg_data[reg];
|
|
|
|
if (ptr_reg_data->max_bits > 0) {
|
|
if (ptr_adts_crc_info->str_crc_reg_data[reg].bit_buf_cnt >
|
|
ptr_reg_data->max_bits)
|
|
bits_remaining = ptr_reg_data->max_bits;
|
|
else
|
|
bits_remaining = ptr_adts_crc_info->str_crc_reg_data[reg].bit_buf_cnt;
|
|
} else {
|
|
bits_remaining = ptr_adts_crc_info->str_crc_reg_data[reg].bit_buf_cnt;
|
|
}
|
|
|
|
while (bits_remaining >= 8) {
|
|
bits = (UWORD8)ixheaacd_read_bits_buf(
|
|
(ia_bit_buf_struct *)(&ptr_adts_crc_info->str_crc_reg_data[reg]
|
|
.str_bit_buf),
|
|
8);
|
|
ixheaacd_adts_crc_fast_crc(ptr_adts_crc_info, &crc, bits);
|
|
bits_remaining -= 8;
|
|
}
|
|
|
|
bits = (UWORD8)ixheaacd_read_bits_buf(
|
|
(ia_bit_buf_struct *)(&ptr_adts_crc_info->str_crc_reg_data[reg]
|
|
.str_bit_buf),
|
|
bits_remaining);
|
|
ixheaacd_adts_crc_slow_crc(&crc, (UWORD8)(bits << (8 - bits_remaining)),
|
|
bits_remaining);
|
|
|
|
if (ptr_reg_data->max_bits >
|
|
ptr_adts_crc_info->str_crc_reg_data[reg].bit_buf_cnt) {
|
|
bits_remaining = ptr_reg_data->max_bits -
|
|
ptr_adts_crc_info->str_crc_reg_data[reg].bit_buf_cnt;
|
|
|
|
for (; bits_remaining >= 8; bits_remaining -= 8) {
|
|
ixheaacd_adts_crc_fast_crc(ptr_adts_crc_info, &crc, 0);
|
|
}
|
|
|
|
ixheaacd_adts_crc_slow_crc(&crc, 0, bits_remaining);
|
|
}
|
|
}
|
|
|
|
ptr_adts_crc_info->no_reg = 0;
|
|
|
|
if (crc != ptr_adts_crc_info->file_value) {
|
|
return (IA_ENHAACPLUS_DEC_EXE_NONFATAL_ADTS_HDR_CRC_FAIL);
|
|
}
|
|
|
|
return (error_code);
|
|
}
|