avidec: avoid infinite loop due to negative ast->sample_size
[ffmpeg.git] / libavcodec / tableprint_vlc.h
1 /*
2  * Helpers for generating hard-coded VLC tables
3  *
4  * Copyright (c) 2014 Reimar Döffinger <Reimar.Doeffinger@gmx.de>
5  *
6  * This file is part of FFmpeg.
7  *
8  * FFmpeg is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * FFmpeg is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with FFmpeg; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22
23 #ifndef AVCODEC_TABLEPRINT_VLC_H
24 #define AVCODEC_TABLEPRINT_VLC_H
25
26 #define FFMPEG_CONFIG_H
27 #define AVUTIL_LOG_H
28 #define av_log(a, ...)
29 #define ff_dlog(a, ...)
30 #define AVUTIL_MEM_H
31 #define av_malloc(s) NULL
32 #define av_malloc_array(a, b) NULL
33 #define av_realloc_f(p, o, n) NULL
34 #define av_free(p)
35 #define av_freep(p)
36 #define AVCODEC_AVCODEC_H
37 #define AVCODEC_INTERNAL_H
38 #include "tableprint.h"
39 #include "get_bits.h"
40 #include "mathtables.c"
41 #include "bitstream.c"
42
43 #define REPLACE_DEFINE2(type) write_##type##_array
44 #define REPLACE_DEFINE(type) REPLACE_DEFINE2(type)
45 static void write_VLC_TYPE_array(const VLC_TYPE *p, int s) {
46     REPLACE_DEFINE(VLC_TYPE)(p, s);
47 }
48
49 WRITE_2D_FUNC(VLC_TYPE)
50
51 static void write_vlc_type(const VLC *vlc, VLC_TYPE (*base_table)[2], const char *base_table_name)
52 {
53     printf("    .bits = %i,\n", vlc->bits);
54     // Unfortunately need to cast away const currently
55     printf("    .table = (VLC_TYPE (*)[2])(%s + 0x%x),\n", base_table_name, (int)(vlc->table - base_table));
56     printf("    .table_size = 0x%x,\n", vlc->table_size);
57     printf("    .table_allocated = 0x%x,\n", vlc->table_allocated);
58 }
59
60 #define WRITE_VLC_TYPE(prefix, name, base_table)        \
61     do {                                                \
62         printf(prefix" VLC "#name" = {\n");             \
63         write_vlc_type(&name, base_table, #base_table); \
64         printf("};\n");                                 \
65     } while(0)
66
67 #define WRITE_VLC_ARRAY(prefix, name, base_table)       \
68     do {                                                \
69         int i;                                          \
70         const size_t array_size = FF_ARRAY_ELEMS(name); \
71         printf(prefix" VLC "#name"[%"FMT"] = {{\n",     \
72                array_size);                             \
73         for (i = 0; i < array_size; i++) {              \
74             write_vlc_type(name + i,                    \
75                            base_table, #base_table);    \
76             if (i != array_size - 1) printf("}, {\n");  \
77         }                                               \
78         printf("}};\n");                                \
79     } while(0)
80
81 #endif /* AVCODEC_TABLEPRINT_VLC_H */