1 /****************************************************************************** 2 * * 3 * Copyright (C) 2018 The Android Open Source Project 4 * 5 * Licensed under the Apache License, Version 2.0 (the "License"); 6 * you may not use this file except in compliance with the License. 7 * You may obtain a copy of the License at: 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 * 17 ***************************************************************************** 18 * Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore 19 */ 20 #ifndef IXHEAACD_BITBUFFER_H 21 #define IXHEAACD_BITBUFFER_H 22 23 #include <setjmp.h> 24 25 #define CRC_ADTS_HEADER_LEN 56 26 #define CRC_ADTS_RAW_DATA_BLK_LEN 192 27 #define CRC_ADTS_RAW_IIND_ICS 128 28 #define CRC_ADTS_LEN_ALL -1 29 30 #define MAX_REG_SIZE 192 31 #define MAX_CRC_REGS 7 32 33 struct ia_crc_bit_buf_struct { 34 UWORD8 *ptr_bit_buf_base; 35 UWORD8 *ptr_bit_buf_end; 36 37 UWORD8 *ptr_read_next; 38 WORD16 bit_pos; 39 WORD32 cnt_bits; 40 41 WORD32 size; 42 }; 43 44 typedef struct { 45 UWORD8 active; 46 WORD32 buf_size; 47 WORD32 max_bits; 48 UWORD32 bit_cnt; 49 WORD32 bit_buf_cnt; 50 struct ia_crc_bit_buf_struct str_bit_buf; 51 } ia_crc_reg_data_struct; 52 53 typedef struct { 54 UWORD8 crc_active; 55 UWORD16 no_reg; 56 UWORD16 file_value; 57 UWORD16 crc_lookup[256]; 58 ia_crc_reg_data_struct str_crc_reg_data[MAX_CRC_REGS]; 59 } ia_adts_crc_info_struct; 60 61 typedef struct ia_bit_buf_struct { 62 UWORD8 *ptr_bit_buf_base; 63 UWORD8 *ptr_bit_buf_end; 64 65 UWORD8 *ptr_read_next; 66 67 WORD32 bit_pos; 68 WORD32 cnt_bits; 69 70 WORD32 size; 71 72 WORD32 adts_header_present; 73 WORD32 crc_check; 74 WORD8 protection_absent; 75 WORD8 no_raw_data_blocks; 76 ia_adts_crc_info_struct str_adts_crc_info; 77 ia_adts_crc_info_struct *pstr_adts_crc_info; 78 79 WORD32 initial_cnt_bits; 80 WORD32 audio_mux_align; 81 WORD32 bit_count; 82 WORD32 valid_bits; 83 UWORD8 byte; 84 UWORD8 *byte_ptr; 85 UWORD8 *ptr_start; 86 WORD32 write_bit_count; 87 WORD32 max_size; 88 jmp_buf *xaac_jmp_buf; 89 90 } ia_bit_buf_struct; 91 92 typedef struct ia_bit_buf_struct *ia_handle_bit_buf_struct; 93 94 typedef struct ia_crc_bit_buf_struct *ia_crc_bit_buf_struct_handle; 95 96 VOID ixheaacd_byte_align(ia_bit_buf_struct *it_bit_buff, 97 WORD32 *ptr_byte_align_bits); 98 99 ia_bit_buf_struct *ixheaacd_create_bit_buf(ia_bit_buf_struct *it_bit_buff, 100 UWORD8 *ptr_bit_buf_base, 101 WORD32 bit_buf_size); 102 103 ia_bit_buf_struct *ixheaacd_create_init_bit_buf(ia_bit_buf_struct *it_bit_buff, 104 UWORD8 *ptr_bit_buf_base, 105 WORD32 bit_buf_size); 106 107 WORD32 ixheaacd_read_bits_buf(ia_bit_buf_struct *it_bit_buff, WORD no_of_bits); 108 109 WORD32 ixheaacd_skip_bits_buf(ia_bit_buf_struct *it_bit_buff, WORD no_of_bits); 110 111 WORD32 ixheaacd_show_bits_buf(ia_bit_buf_struct *it_bit_buff, WORD no_of_bits); 112 113 VOID ixheaacd_read_bidirection(ia_bit_buf_struct *it_bit_buff, 114 WORD32 ixheaacd_drc_offset); 115 116 UWORD32 ixheaacd_aac_showbits_32(UWORD8 *ptr_read_next, WORD32 cnt_bits, 117 WORD32 *increment); 118 119 UWORD32 ixheaacd_aac_read_byte(UWORD8 **ptr_read_next, WORD32 *bit_pos, 120 WORD32 *readword); 121 122 UWORD32 ixheaacd_aac_read_byte_corr(UWORD8 **ptr_read_next, WORD32 *ptr_bit_pos, 123 WORD32 *readword, UWORD8 *p_bit_buf_end); 124 125 UWORD32 ixheaacd_aac_read_byte_corr1(UWORD8 **ptr_read_next, 126 WORD32 *ptr_bit_pos, WORD32 *readword, 127 UWORD8 *p_bit_buf_end); 128 129 #define get_no_bits_available(it_bit_buff) ((it_bit_buff)->cnt_bits) 130 #define ixheaacd_no_bits_read(it_bit_buff) \ 131 ((it_bit_buff)->size - (it_bit_buff)->cnt_bits) 132 133 WORD32 ixheaacd_aac_read_bit_rev(ia_bit_buf_struct *it_bit_buff); 134 WORD32 ixheaacd_aac_read_bit(ia_bit_buf_struct *it_bit_buff); 135 136 VOID ixheaacd_write_bit(ia_bit_buf_struct *it_bit_buff, WORD32 value, 137 WORD32 no_of_bits); 138 139 WORD32 ixheaacd_read_bit(ia_bit_buf_struct *data, WORD32 no_of_bits); 140 141 #endif /* IXHEAACD_BITBUFFER_H */ 142