315 lines
8.1 KiB
C
315 lines
8.1 KiB
C
/******************************************************************************
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* *
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* Copyright (C) 2018 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*****************************************************************************
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* Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore
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*/
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#include <string.h>
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#include <assert.h>
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#include "ixheaacd_sbr_common.h"
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#include "ixheaacd_type_def.h"
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#include "ixheaacd_constants.h"
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#include "ixheaacd_basic_ops32.h"
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#include "ixheaacd_basic_ops16.h"
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#include "ixheaacd_basic_ops40.h"
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#include "ixheaacd_basic_ops.h"
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#include "ixheaacd_basic_op.h"
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#include "ixheaacd_intrinsics.h"
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#include "ixheaacd_bitbuffer.h"
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#include "ixheaacd_adts_crc_check.h"
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#include "ixheaacd_error_codes.h"
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VOID ixheaacd_byte_align(ia_bit_buf_struct *it_bit_buff,
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WORD32 *align_bits_cnt) {
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WORD alignment;
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alignment = (WORD)((*align_bits_cnt - it_bit_buff->cnt_bits) & 0x07);
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if (alignment) {
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ixheaacd_read_bits_buf(it_bit_buff, (8 - alignment));
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}
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*align_bits_cnt = it_bit_buff->cnt_bits;
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}
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WORD32 ixheaacd_skip_bits_buf(ia_bit_buf_struct *it_bit_buff, WORD no_of_bits) {
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UWORD8 *ptr_read_next = it_bit_buff->ptr_read_next;
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WORD bit_pos = it_bit_buff->bit_pos;
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if (it_bit_buff->cnt_bits < no_of_bits || it_bit_buff->cnt_bits < 0)
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longjmp(*(it_bit_buff->xaac_jmp_buf),
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IA_ENHAACPLUS_DEC_EXE_NONFATAL_INSUFFICIENT_INPUT_BYTES);
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it_bit_buff->cnt_bits -= no_of_bits;
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ptr_read_next += no_of_bits / 8;
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bit_pos -= (no_of_bits % 8);
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if (bit_pos < 0) {
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bit_pos += 8;
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ptr_read_next++;
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}
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assert(bit_pos >= 0 && bit_pos <= 7);
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it_bit_buff->ptr_read_next = ptr_read_next;
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it_bit_buff->bit_pos = (WORD16)bit_pos;
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return no_of_bits;
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}
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WORD32 ixheaacd_show_bits_buf(ia_bit_buf_struct *it_bit_buff, WORD no_of_bits) {
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UWORD32 ret_val;
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UWORD8 *ptr_read_next = it_bit_buff->ptr_read_next;
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WORD bit_pos = it_bit_buff->bit_pos;
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if (no_of_bits == 0) {
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return 0;
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}
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if (it_bit_buff->cnt_bits < no_of_bits || it_bit_buff->cnt_bits < 0 ||
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no_of_bits > 25) {
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longjmp(*(it_bit_buff->xaac_jmp_buf),
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IA_ENHAACPLUS_DEC_EXE_NONFATAL_INSUFFICIENT_INPUT_BYTES);
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}
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ret_val = (UWORD32)*ptr_read_next;
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bit_pos -= no_of_bits;
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while (bit_pos < -1) {
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bit_pos += 8;
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ptr_read_next++;
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ret_val <<= 8;
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ret_val |= (UWORD32)*ptr_read_next;
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}
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if (bit_pos == -1) {
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bit_pos += 8;
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ret_val <<= 8;
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ptr_read_next++;
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}
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ret_val = ret_val << ((31 - no_of_bits) - bit_pos) >> (32 - no_of_bits);
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return ret_val;
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}
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WORD32 ixheaacd_read_bits_buf(ia_bit_buf_struct *it_bit_buff, WORD no_of_bits) {
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UWORD32 ret_val;
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UWORD8 *ptr_read_next = it_bit_buff->ptr_read_next;
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WORD bit_pos = it_bit_buff->bit_pos;
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if (no_of_bits == 0) {
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return 0;
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}
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if (it_bit_buff->cnt_bits < no_of_bits || it_bit_buff->cnt_bits < 0 ||
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no_of_bits > 25) {
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longjmp(*(it_bit_buff->xaac_jmp_buf),
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IA_ENHAACPLUS_DEC_EXE_NONFATAL_INSUFFICIENT_INPUT_BYTES);
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}
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it_bit_buff->cnt_bits -= no_of_bits;
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ret_val = (UWORD32)*ptr_read_next;
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bit_pos -= no_of_bits;
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while (bit_pos < -1) {
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bit_pos += 8;
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ptr_read_next++;
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ret_val <<= 8;
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ret_val |= (UWORD32)*ptr_read_next;
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}
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if (bit_pos == -1) {
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bit_pos += 8;
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ret_val <<= 8;
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ptr_read_next++;
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}
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ret_val = ret_val << ((31 - no_of_bits) - bit_pos) >> (32 - no_of_bits);
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it_bit_buff->ptr_read_next = ptr_read_next;
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it_bit_buff->bit_pos = (WORD16)bit_pos;
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return ret_val;
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}
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VOID ixheaacd_aac_read_byte(UWORD8 **ptr_read_next, WORD32 *bit_pos,
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WORD32 *readword) {
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UWORD8 *v = *ptr_read_next;
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WORD32 bits_consumed = *bit_pos;
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if ((bits_consumed -= 8) >= 0) {
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*readword = (*readword << 8) | *v;
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v++;
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} else {
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bits_consumed += 8;
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}
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*bit_pos = bits_consumed;
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*ptr_read_next = v;
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return;
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}
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VOID ixheaacd_aac_read_byte_corr1(UWORD8 **ptr_read_next, WORD32 *ptr_bit_pos,
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WORD32 *readword, UWORD8 *p_bit_buf_end) {
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UWORD8 *v = *ptr_read_next;
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WORD32 bits_consumed = *ptr_bit_pos;
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WORD32 temp_bit_count = 0;
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while (bits_consumed >= 8) {
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bits_consumed -= 8;
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if ((p_bit_buf_end < v) && (p_bit_buf_end != 0))
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temp_bit_count += 8;
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else {
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*readword = (*readword << 8) | *v;
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v++;
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}
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}
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*ptr_bit_pos = bits_consumed + temp_bit_count;
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*ptr_read_next = v;
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return;
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}
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VOID ixheaacd_aac_read_byte_corr(UWORD8 **ptr_read_next, WORD32 *ptr_bit_pos,
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WORD32 *readword, UWORD8 *p_bit_buf_end) {
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UWORD8 *v = *ptr_read_next;
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WORD32 bits_consumed = *ptr_bit_pos;
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if ((bits_consumed -= 8) >= 0) {
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if (p_bit_buf_end < v)
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bits_consumed += 8;
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else {
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*readword = (*readword << 8) | *v;
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v++;
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}
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} else {
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bits_consumed += 8;
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}
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*ptr_bit_pos = bits_consumed;
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*ptr_read_next = v;
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return;
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}
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WORD32 ixheaacd_aac_read_bit(ia_bit_buf_struct *it_bit_buff) {
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UWORD8 ret_val;
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UWORD8 *ptr_read_next = it_bit_buff->ptr_read_next;
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WORD bit_pos = it_bit_buff->bit_pos;
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UWORD32 temp;
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WORD no_of_bits = 1;
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if (bit_pos < 0) {
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bit_pos = 7;
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ptr_read_next--;
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}
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if (ptr_read_next < it_bit_buff->ptr_bit_buf_base) {
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longjmp(*(it_bit_buff->xaac_jmp_buf),
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IA_ENHAACPLUS_DEC_EXE_NONFATAL_INSUFFICIENT_INPUT_BYTES);
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}
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it_bit_buff->cnt_bits += no_of_bits;
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ret_val = *ptr_read_next;
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bit_pos -= no_of_bits;
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temp = (ret_val << 24) << (bit_pos + no_of_bits);
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it_bit_buff->ptr_read_next = ptr_read_next;
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it_bit_buff->bit_pos = (WORD16)bit_pos;
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return temp >> (32 - no_of_bits);
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}
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WORD32 ixheaacd_aac_read_bit_rev(ia_bit_buf_struct *it_bit_buff) {
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UWORD8 ret_val;
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UWORD8 *ptr_read_next = it_bit_buff->ptr_read_next;
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WORD bit_pos = it_bit_buff->bit_pos;
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UWORD32 temp;
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WORD no_of_bits = 1;
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if (it_bit_buff->cnt_bits < no_of_bits || it_bit_buff->cnt_bits < 0) {
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longjmp(*(it_bit_buff->xaac_jmp_buf),
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IA_ENHAACPLUS_DEC_EXE_NONFATAL_INSUFFICIENT_INPUT_BYTES);
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}
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if (bit_pos >= 8) {
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bit_pos -= 8;
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ptr_read_next++;
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}
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it_bit_buff->cnt_bits -= no_of_bits;
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ret_val = *ptr_read_next;
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bit_pos += no_of_bits;
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temp = (ret_val << 24) << (bit_pos - no_of_bits);
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it_bit_buff->ptr_read_next = ptr_read_next;
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it_bit_buff->bit_pos = (WORD16)bit_pos;
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return temp >> (32 - no_of_bits);
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}
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VOID ixheaacd_write_bit(ia_bit_buf_struct *it_bit_buff, WORD32 value,
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WORD32 no_of_bits)
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{
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WORD32 mask;
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if (no_of_bits == 0) return;
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mask = 0x1;
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mask <<= no_of_bits - 1;
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it_bit_buff->bit_count += no_of_bits;
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while (no_of_bits > 0) {
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while (no_of_bits > 0 && it_bit_buff->valid_bits < 8) {
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it_bit_buff->byte <<= 1;
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if (value & mask) it_bit_buff->byte |= 0x1;
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value <<= 1;
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no_of_bits--;
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it_bit_buff->valid_bits++;
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}
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if (it_bit_buff->valid_bits == 8) {
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*it_bit_buff->byte_ptr++ = it_bit_buff->byte;
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it_bit_buff->byte = 0;
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it_bit_buff->valid_bits = 0;
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}
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}
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}
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WORD32 ixheaacd_read_bit(ia_bit_buf_struct *it_bit_buff, WORD32 no_of_bits) {
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UWORD32 ret_val;
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UWORD8 *ptr_read_next = it_bit_buff->byte_ptr;
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if (no_of_bits == 0) {
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return 0;
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}
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ret_val =
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ixheaacd_aac_showbits_32(ptr_read_next, it_bit_buff->bit_count, NULL);
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it_bit_buff->byte_ptr += (no_of_bits >> 3);
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if (it_bit_buff->valid_bits != 8) {
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UWORD8 *v = it_bit_buff->byte_ptr;
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ret_val = (ret_val << (8 - it_bit_buff->valid_bits)) |
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(*v >> it_bit_buff->valid_bits);
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}
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it_bit_buff->valid_bits -= (no_of_bits % 8);
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ret_val = ret_val >> (32 - no_of_bits);
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return ret_val;
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}
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