| /****************************************************************************** |
| * * |
| * 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 <assert.h> |
| #include "ixheaacd_sbr_common.h" |
| #include "ixheaac_type_def.h" |
| #include "ixheaac_constants.h" |
| #include "ixheaac_basic_ops32.h" |
| #include "ixheaac_basic_ops16.h" |
| #include "ixheaac_basic_ops40.h" |
| #include "ixheaac_basic_ops.h" |
| |
| #include "ixheaac_basic_op.h" |
| #include "ixheaacd_intrinsics.h" |
| #include "ixheaacd_bitbuffer.h" |
| |
| #include "ixheaacd_adts_crc_check.h" |
| #include "ixheaacd_error_codes.h" |
| |
| VOID ixheaacd_byte_align(ia_bit_buf_struct *it_bit_buff, |
| WORD32 *align_bits_cnt) { |
| WORD alignment; |
| alignment = (WORD)((*align_bits_cnt - it_bit_buff->cnt_bits) & 0x07); |
| |
| if (alignment) { |
| ixheaacd_read_bits_buf(it_bit_buff, (8 - alignment)); |
| } |
| |
| *align_bits_cnt = it_bit_buff->cnt_bits; |
| } |
| |
| WORD32 ixheaacd_skip_bits_buf(ia_bit_buf_struct *it_bit_buff, WORD no_of_bits) { |
| UWORD8 *ptr_read_next = it_bit_buff->ptr_read_next; |
| WORD bit_pos = it_bit_buff->bit_pos; |
| |
| if (it_bit_buff->cnt_bits < no_of_bits || it_bit_buff->cnt_bits < 0) |
| longjmp(*(it_bit_buff->xaac_jmp_buf), |
| IA_XHEAAC_DEC_EXE_NONFATAL_INSUFFICIENT_INPUT_BYTES); |
| it_bit_buff->cnt_bits -= no_of_bits; |
| |
| ptr_read_next += no_of_bits / 8; |
| bit_pos -= (no_of_bits % 8); |
| if (bit_pos < 0) { |
| bit_pos += 8; |
| ptr_read_next++; |
| } |
| assert(bit_pos >= 0 && bit_pos <= 7); |
| |
| it_bit_buff->ptr_read_next = ptr_read_next; |
| it_bit_buff->bit_pos = (WORD16)bit_pos; |
| return no_of_bits; |
| } |
| |
| WORD32 ixheaacd_show_bits_buf(ia_bit_buf_struct *it_bit_buff, WORD no_of_bits) { |
| UWORD32 ret_val; |
| UWORD8 *ptr_read_next = it_bit_buff->ptr_read_next; |
| WORD bit_pos = it_bit_buff->bit_pos; |
| |
| if (no_of_bits == 0) { |
| return 0; |
| } |
| |
| if (it_bit_buff->cnt_bits < no_of_bits || it_bit_buff->cnt_bits < 0 || |
| no_of_bits > 25) { |
| longjmp(*(it_bit_buff->xaac_jmp_buf), |
| IA_XHEAAC_DEC_EXE_NONFATAL_INSUFFICIENT_INPUT_BYTES); |
| } |
| |
| ret_val = (UWORD32)*ptr_read_next; |
| |
| bit_pos -= no_of_bits; |
| while (bit_pos < -1) { |
| bit_pos += 8; |
| ptr_read_next++; |
| |
| ret_val <<= 8; |
| |
| ret_val |= (UWORD32)*ptr_read_next; |
| } |
| |
| if (bit_pos == -1) { |
| bit_pos += 8; |
| ret_val <<= 8; |
| ptr_read_next++; |
| } |
| |
| ret_val = ret_val << ((31 - no_of_bits) - bit_pos) >> (32 - no_of_bits); |
| |
| return ret_val; |
| } |
| |
| WORD32 ixheaacd_read_bits_buf(ia_bit_buf_struct *it_bit_buff, WORD no_of_bits) { |
| UWORD32 ret_val; |
| UWORD8 *ptr_read_next = it_bit_buff->ptr_read_next; |
| WORD bit_pos = it_bit_buff->bit_pos; |
| |
| if (no_of_bits == 0) { |
| return 0; |
| } |
| |
| if (it_bit_buff->cnt_bits < no_of_bits || it_bit_buff->cnt_bits < 0 || |
| no_of_bits > 25) { |
| longjmp(*(it_bit_buff->xaac_jmp_buf), |
| IA_XHEAAC_DEC_EXE_NONFATAL_INSUFFICIENT_INPUT_BYTES); |
| } |
| |
| it_bit_buff->cnt_bits -= no_of_bits; |
| ret_val = (UWORD32)*ptr_read_next; |
| |
| bit_pos -= no_of_bits; |
| while (bit_pos < -1) { |
| bit_pos += 8; |
| ptr_read_next++; |
| |
| ret_val <<= 8; |
| |
| ret_val |= (UWORD32)*ptr_read_next; |
| } |
| |
| if (bit_pos == -1) { |
| bit_pos += 8; |
| ret_val <<= 8; |
| ptr_read_next++; |
| } |
| |
| ret_val = ret_val << ((31 - no_of_bits) - bit_pos) >> (32 - no_of_bits); |
| it_bit_buff->ptr_read_next = ptr_read_next; |
| it_bit_buff->bit_pos = (WORD16)bit_pos; |
| return ret_val; |
| } |
| |
| VOID ixheaacd_aac_read_byte(UWORD8 **ptr_read_next, WORD32 *bit_pos, |
| WORD32 *readword) { |
| UWORD8 *v = *ptr_read_next; |
| WORD32 bits_consumed = *bit_pos; |
| |
| if ((bits_consumed -= 8) >= 0) { |
| *readword = (*readword << 8) | *v; |
| v++; |
| } else { |
| bits_consumed += 8; |
| } |
| *bit_pos = bits_consumed; |
| *ptr_read_next = v; |
| return; |
| } |
| |
| VOID ixheaacd_aac_read_byte_corr1(UWORD8 **ptr_read_next, WORD32 *ptr_bit_pos, |
| WORD32 *readword, UWORD8 *p_bit_buf_end) { |
| UWORD8 *v = *ptr_read_next; |
| WORD32 bits_consumed = *ptr_bit_pos; |
| WORD32 temp_bit_count = 0; |
| |
| while (bits_consumed >= 8) { |
| bits_consumed -= 8; |
| if ((p_bit_buf_end < v) && (p_bit_buf_end != 0)) |
| temp_bit_count += 8; |
| else { |
| *readword = (*readword << 8) | *v; |
| v++; |
| } |
| } |
| |
| if (bits_consumed > (31 - temp_bit_count)) { |
| if ((p_bit_buf_end != NULL) && (p_bit_buf_end < v)) { |
| bits_consumed = 31 - temp_bit_count; |
| } |
| } |
| |
| *ptr_bit_pos = bits_consumed + temp_bit_count; |
| *ptr_read_next = v; |
| return; |
| } |
| |
| VOID ixheaacd_aac_read_byte_corr(UWORD8 **ptr_read_next, WORD32 *ptr_bit_pos, |
| WORD32 *readword, UWORD8 *p_bit_buf_end) { |
| UWORD8 *v = *ptr_read_next; |
| WORD32 bits_consumed = *ptr_bit_pos; |
| |
| if ((bits_consumed -= 8) >= 0) { |
| if (p_bit_buf_end < v) |
| bits_consumed += 8; |
| else { |
| *readword = (*readword << 8) | *v; |
| v++; |
| } |
| } else { |
| bits_consumed += 8; |
| } |
| |
| if (bits_consumed > 31) { |
| if (p_bit_buf_end < v) { |
| bits_consumed = 31; |
| } |
| } |
| |
| *ptr_bit_pos = bits_consumed; |
| *ptr_read_next = v; |
| return; |
| } |
| |
| WORD32 ixheaacd_aac_read_bit(ia_bit_buf_struct *it_bit_buff) { |
| UWORD8 ret_val; |
| UWORD8 *ptr_read_next = it_bit_buff->ptr_read_next; |
| WORD bit_pos = it_bit_buff->bit_pos; |
| UWORD32 temp; |
| WORD no_of_bits = 1; |
| |
| if (bit_pos < 0) { |
| bit_pos = 7; |
| ptr_read_next--; |
| } |
| |
| if (ptr_read_next < it_bit_buff->ptr_bit_buf_base) { |
| longjmp(*(it_bit_buff->xaac_jmp_buf), |
| IA_XHEAAC_DEC_EXE_NONFATAL_INSUFFICIENT_INPUT_BYTES); |
| } |
| |
| it_bit_buff->cnt_bits += no_of_bits; |
| ret_val = *ptr_read_next; |
| bit_pos -= no_of_bits; |
| |
| temp = (ret_val << 24) << (bit_pos + no_of_bits); |
| it_bit_buff->ptr_read_next = ptr_read_next; |
| it_bit_buff->bit_pos = (WORD16)bit_pos; |
| |
| return temp >> (32 - no_of_bits); |
| } |
| |
| WORD32 ixheaacd_aac_read_bit_rev(ia_bit_buf_struct *it_bit_buff) { |
| UWORD8 ret_val; |
| UWORD8 *ptr_read_next = it_bit_buff->ptr_read_next; |
| WORD bit_pos = it_bit_buff->bit_pos; |
| UWORD32 temp; |
| WORD no_of_bits = 1; |
| |
| if (it_bit_buff->cnt_bits < no_of_bits || it_bit_buff->cnt_bits < 0) { |
| longjmp(*(it_bit_buff->xaac_jmp_buf), |
| IA_XHEAAC_DEC_EXE_NONFATAL_INSUFFICIENT_INPUT_BYTES); |
| } |
| |
| if (bit_pos >= 8) { |
| bit_pos -= 8; |
| ptr_read_next++; |
| } |
| |
| it_bit_buff->cnt_bits -= no_of_bits; |
| ret_val = *ptr_read_next; |
| bit_pos += no_of_bits; |
| |
| temp = (ret_val << 24) << (bit_pos - no_of_bits); |
| it_bit_buff->ptr_read_next = ptr_read_next; |
| it_bit_buff->bit_pos = (WORD16)bit_pos; |
| |
| return temp >> (32 - no_of_bits); |
| } |
| |
| VOID ixheaacd_write_bit(ia_bit_buf_struct *it_bit_buff, WORD32 value, |
| WORD32 no_of_bits) |
| |
| { |
| WORD32 mask; |
| |
| if (no_of_bits == 0) return; |
| |
| mask = 0x1; |
| mask <<= no_of_bits - 1; |
| |
| it_bit_buff->bit_count += no_of_bits; |
| |
| while (no_of_bits > 0) { |
| while (no_of_bits > 0 && it_bit_buff->valid_bits < 8) { |
| it_bit_buff->byte <<= 1; |
| if (value & mask) it_bit_buff->byte |= 0x1; |
| value <<= 1; |
| no_of_bits--; |
| it_bit_buff->valid_bits++; |
| } |
| if (it_bit_buff->valid_bits == 8) { |
| *it_bit_buff->byte_ptr++ = it_bit_buff->byte; |
| it_bit_buff->byte = 0; |
| it_bit_buff->valid_bits = 0; |
| } |
| } |
| } |
| |
| WORD32 ixheaacd_read_bit(ia_bit_buf_struct *it_bit_buff, WORD32 no_of_bits) { |
| UWORD32 ret_val; |
| UWORD8 *ptr_read_next = it_bit_buff->byte_ptr; |
| |
| if (no_of_bits == 0) { |
| return 0; |
| } |
| |
| ret_val = |
| ixheaacd_aac_showbits_32(ptr_read_next, it_bit_buff->bit_count, NULL); |
| it_bit_buff->byte_ptr += (no_of_bits >> 3); |
| |
| if (it_bit_buff->valid_bits != 8) { |
| UWORD8 *v = it_bit_buff->byte_ptr; |
| ret_val = (ret_val << (8 - it_bit_buff->valid_bits)) | |
| (*v >> it_bit_buff->valid_bits); |
| } |
| |
| it_bit_buff->valid_bits -= (no_of_bits % 8); |
| |
| ret_val = ret_val >> (32 - no_of_bits); |
| |
| return ret_val; |
| } |