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 #include <stdlib.h>
21 #include <stdio.h>
22
23 #include "ixheaacd_type_def.h"
24 #include "ixheaacd_interface.h"
25
26 #include "ixheaacd_bitbuffer.h"
27 #include "ixheaacd_info.h"
28 #include "ixheaacd_bitbuffer.h"
29
ixheaacd_hufftab(ia_huff_code_book_struct * ptr_huff_code_book,const ia_huff_code_word_struct * ptr_huff_code_word,const WORD16 * code_book_tbl,const WORD32 * index,WORD32 dim,WORD32 lav,WORD32 lav_incr_esc,WORD32 sign_code_book,UWORD8 max_code_word_len)30 VOID ixheaacd_hufftab(ia_huff_code_book_struct *ptr_huff_code_book,
31 const ia_huff_code_word_struct *ptr_huff_code_word,
32 const WORD16 *code_book_tbl, const WORD32 *index,
33 WORD32 dim, WORD32 lav, WORD32 lav_incr_esc,
34 WORD32 sign_code_book, UWORD8 max_code_word_len) {
35 WORD32 i, num;
36
37 if (!sign_code_book) {
38 ptr_huff_code_book->huff_mode = lav + 1;
39 ptr_huff_code_book->off = 0;
40 } else {
41 ptr_huff_code_book->huff_mode = 2 * lav + 1;
42 ptr_huff_code_book->off = lav;
43 }
44 num = 1;
45 for (i = 0; i < dim; i++) num *= ptr_huff_code_book->huff_mode;
46
47 ptr_huff_code_book->num = num;
48 ptr_huff_code_book->dim = dim;
49 ptr_huff_code_book->lav = lav;
50 ptr_huff_code_book->lav_incr_esc = lav_incr_esc;
51 ptr_huff_code_book->sign_code_book = sign_code_book;
52 ptr_huff_code_book->pstr_huff_code_word = ptr_huff_code_word;
53 ptr_huff_code_book->code_book_tbl = code_book_tbl;
54 ptr_huff_code_book->idx_tbl = index;
55 ptr_huff_code_book->max_code_word_len = max_code_word_len;
56 }
57
ixheaacd_huff_codeword(const ia_huff_code_word_struct * ptr_huff_code_word,UWORD16 data_present,ia_bit_buf_struct * it_bit_buff)58 WORD32 ixheaacd_huff_codeword(
59 const ia_huff_code_word_struct *ptr_huff_code_word, UWORD16 data_present,
60 ia_bit_buf_struct *it_bit_buff)
61
62 {
63 WORD32 i, j;
64 UWORD32 code_word = 0;
65 UWORD32 tmp = 0;
66
67 i = ptr_huff_code_word->len;
68 if (data_present == 0) {
69 code_word = ixheaacd_read_bits_buf(it_bit_buff, i);
70 }
71
72 if (data_present == 1) {
73 code_word = ixheaacd_read_bits_buf(it_bit_buff, i);
74 }
75 while (code_word != ptr_huff_code_word->code_word) {
76 ptr_huff_code_word++;
77 j = ptr_huff_code_word->len - i;
78 if (j < 0) {
79 return ptr_huff_code_word->index;
80 }
81
82 i += j;
83 code_word <<= j;
84
85 if (data_present == 0) {
86 tmp = ixheaacd_read_bits_buf(it_bit_buff, j);
87 }
88
89 if (data_present == 1) {
90 tmp = ixheaacd_read_bits_buf(it_bit_buff, j);
91 }
92
93 code_word |= tmp;
94 }
95 return (ptr_huff_code_word->index);
96 }
97