FFmpeg
tableprint_vlc.h
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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 AVUTIL_LOG_H
27 #define av_log(a, ...) while(0)
28 #define ff_dlog(a, ...) while(0)
29 #define AVUTIL_MEM_H
30 #define av_malloc(s) NULL
31 #define av_malloc_array(a, b) NULL
32 #define av_realloc_f(p, o, n) NULL
33 #define av_free(p) while(0)
34 #define av_freep(p) while(0)
35 #define AVUTIL_INTERNAL_H
36 #define avpriv_request_sample(...)
37 #include "tableprint.h"
38 #include "vlc.h"
39 #include "libavutil/reverse.c"
40 #include "vlc.c"
41 
42 // The following will have to be modified if VLCBaseType changes.
43 WRITE_1D_FUNC_ARGV(VLCElem, 3, "{ .sym =%5" PRId16 ", .len =%2"PRIi16 " }",
44  data[i].sym, data[i].len)
45 
46 static void write_vlc_type(const VLC *vlc, const VLCElem *base_table, const char *base_table_name)
47 {
48  printf(" .bits = %i,\n", vlc->bits);
49  // Unfortunately need to cast away const currently
50  printf(" .table = (VLCElem *)(%s + 0x%x),\n", base_table_name, (int)(vlc->table - base_table));
51  printf(" .table_size = 0x%x,\n", vlc->table_size);
52  printf(" .table_allocated = 0x%x,\n", vlc->table_allocated);
53 }
54 
55 #define WRITE_VLC_TABLE(prefix, name) \
56  WRITE_ARRAY(prefix, VLCElem, name)
57 
58 #define WRITE_VLC_TYPE(prefix, name, base_table) \
59  do { \
60  printf(prefix" VLC "#name" = {\n"); \
61  write_vlc_type(&name, base_table, #base_table); \
62  printf("};\n"); \
63  } while(0)
64 
65 #define WRITE_VLC_ARRAY(prefix, name, base_table) \
66  do { \
67  int i; \
68  const size_t array_size = FF_ARRAY_ELEMS(name); \
69  printf(prefix" VLC "#name"[%"FMT"] = {{\n", \
70  array_size); \
71  for (i = 0; i < array_size; i++) { \
72  write_vlc_type(name + i, \
73  base_table, #base_table); \
74  if (i != array_size - 1) printf("}, {\n"); \
75  } \
76  printf("}};\n"); \
77  } while(0)
78 
79 #endif /* AVCODEC_TABLEPRINT_VLC_H */
tableprint.h
base_table
const VLCElem * base_table
Definition: tableprint_vlc.h:46
data
const char data[16]
Definition: mxf.c:146
printf
printf(" .table = (VLCElem *)(%s + 0x%x),\n", base_table_name,(int)(vlc->table - base_table))
WRITE_1D_FUNC_ARGV
WRITE_1D_FUNC_ARGV(VLCElem, 3, "{ .sym =%5" PRId16 ", .len =%2"PRIi16 " }", data[i].sym, data[i].len) static void write_vlc_type(const VLC *vlc
base_table_name
const VLCElem const char * base_table_name
Definition: tableprint_vlc.h:47
VLCElem
Definition: vlc.h:27
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
reverse.c
len
int len
Definition: vorbis_enc_data.h:426
VLC
Definition: vlc.h:31
vlc.h
vlc.c