1 /****************************************************************************** 2 * * 3 * Copyright (C) 2023 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 21 #pragma once 22 23 #undef ARIB_COMPLIANCE 24 #undef ADTS_CRC_ENABLE 25 26 typedef struct { 27 UWORD8 *ptr_bit_buf_base; /* pointer points to first position in bitstream buffer */ 28 UWORD8 *ptr_bit_buf_end; /* pointer points to last position in bitstream buffer */ 29 UWORD8 *ptr_read_next; /* pointer points to next available word in bitstream buffer to read */ 30 UWORD8 *ptr_write_next; /* pointer points to next available word in bitstream buffer to write */ 31 WORD32 read_position; /* 7 <= read_position <= 0 */ 32 WORD32 write_position; /* 7 <= write_position <= 0 */ 33 WORD32 cnt_bits; /* number of available bits in the bitstream buffer 34 write bits to bitstream buffer => increment cnt_bits 35 read bits from bitstream buffer => decrement cnt_bits */ 36 WORD32 size; /* size of bitbuffer in bits */ 37 } ixheaace_bit_buf; 38 39 /* Define pointer to bit buffer structure */ 40 typedef ixheaace_bit_buf *ixheaace_bit_buf_handle; 41 42 ixheaace_bit_buf_handle ia_enhaacplus_enc_create_bitbuffer(ixheaace_bit_buf_handle pstr_bit_buf, 43 UWORD8 *ptr_bit_buf_base, 44 UWORD32 bitbuf_size); 45 46 VOID ia_enhaacplus_enc_delete_bitbuffer(ixheaace_bit_buf_handle pstr_bit_buf); 47 48 UWORD32 ixheaace_readbits(ixheaace_bit_buf_handle pstr_bit_buf, UWORD8 no_bits_to_read); 49 50 UWORD8 ixheaace_write_bits(ixheaace_bit_buf_handle pstr_bit_buf, UWORD32 write_value, 51 UWORD8 num_bits_to_write); 52 53 VOID ixheaace_reset_bitbuf(ixheaace_bit_buf_handle pstr_bit_buf, UWORD8 *ptr_bit_buf_base, 54 UWORD32 bitbuf_size); 55 56 VOID ixheaace_copy_bitbuf_to_and_fro(ixheaace_bit_buf_handle h_bitbuf_src, 57 ixheaace_bit_buf_handle h_bitbuf_dst); 58 59 VOID ia_enhaacplus_enc_copy_bitbuf(ixheaace_bit_buf_handle h_bitbuf_src, 60 ixheaace_bit_buf_handle h_bitbuf_dst); 61 62 VOID ia_enhaacplus_enc_wind_bitbuffer_bidirectional(ixheaace_bit_buf_handle pstr_bit_buf, 63 WORD32 offset); 64 65 WORD32 ia_enhaacplus_enc_get_bits_available(ixheaace_bit_buf_handle pstr_bit_buf_handle); 66 67 UWORD32 ixheaace_byte_align_buffer(ixheaace_bit_buf_handle pstr_it_bit_buff); 68