1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
|
/*
* copyright (c) 2009 Michael Niedermayer
*
* This file is part of Libav.
*
* Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* Libav is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <strings.h>
#include "avformat.h"
#include "metadata.h"
AVMetadataTag *
av_metadata_get(AVMetadata *m, const char *key, const AVMetadataTag *prev, int flags)
{
unsigned int i, j;
if(!m)
return NULL;
if(prev) i= prev - m->elems + 1;
else i= 0;
for(; i<m->count; i++){
const char *s= m->elems[i].key;
if(flags & AV_METADATA_MATCH_CASE) for(j=0; s[j] == key[j] && key[j]; j++);
else for(j=0; toupper(s[j]) == toupper(key[j]) && key[j]; j++);
if(key[j])
continue;
if(s[j] && !(flags & AV_METADATA_IGNORE_SUFFIX))
continue;
return &m->elems[i];
}
return NULL;
}
int av_metadata_set2(AVMetadata **pm, const char *key, const char *value, int flags)
{
AVMetadata *m= *pm;
AVMetadataTag *tag= av_metadata_get(m, key, NULL, flags);
if(!m)
m=*pm= av_mallocz(sizeof(*m));
if(tag){
if (flags & AV_METADATA_DONT_OVERWRITE)
return 0;
av_free(tag->value);
av_free(tag->key);
*tag= m->elems[--m->count];
}else{
AVMetadataTag *tmp= av_realloc(m->elems, (m->count+1) * sizeof(*m->elems));
if(tmp){
m->elems= tmp;
}else
return AVERROR(ENOMEM);
}
if(value){
if(flags & AV_METADATA_DONT_STRDUP_KEY){
m->elems[m->count].key = key;
}else
m->elems[m->count].key = av_strdup(key );
if(flags & AV_METADATA_DONT_STRDUP_VAL){
m->elems[m->count].value= value;
}else
m->elems[m->count].value= av_strdup(value);
m->count++;
}
if(!m->count) {
av_free(m->elems);
av_freep(pm);
}
return 0;
}
#if FF_API_OLD_METADATA
int av_metadata_set(AVMetadata **pm, const char *key, const char *value)
{
return av_metadata_set2(pm, key, value, 0);
}
#endif
#if FF_API_OLD_METADATA2
void av_metadata_conv(AVFormatContext *ctx, const AVMetadataConv *d_conv,
const AVMetadataConv *s_conv)
{
return;
}
#endif
void av_metadata_free(AVMetadata **pm)
{
AVMetadata *m= *pm;
if(m){
while(m->count--){
av_free(m->elems[m->count].key);
av_free(m->elems[m->count].value);
}
av_free(m->elems);
}
av_freep(pm);
}
void ff_metadata_conv(AVMetadata **pm, const AVMetadataConv *d_conv,
const AVMetadataConv *s_conv)
{
/* TODO: use binary search to look up the two conversion tables
if the tables are getting big enough that it would matter speed wise */
const AVMetadataConv *sc, *dc;
AVMetadataTag *mtag = NULL;
AVMetadata *dst = NULL;
const char *key;
if (d_conv == s_conv)
return;
while((mtag=av_metadata_get(*pm, "", mtag, AV_METADATA_IGNORE_SUFFIX))) {
key = mtag->key;
if (s_conv)
for (sc=s_conv; sc->native; sc++)
if (!strcasecmp(key, sc->native)) {
key = sc->generic;
break;
}
if (d_conv)
for (dc=d_conv; dc->native; dc++)
if (!strcasecmp(key, dc->generic)) {
key = dc->native;
break;
}
av_metadata_set2(&dst, key, mtag->value, 0);
}
av_metadata_free(pm);
*pm = dst;
}
void ff_metadata_conv_ctx(AVFormatContext *ctx, const AVMetadataConv *d_conv,
const AVMetadataConv *s_conv)
{
int i;
ff_metadata_conv(&ctx->metadata, d_conv, s_conv);
for (i=0; i<ctx->nb_streams ; i++)
ff_metadata_conv(&ctx->streams [i]->metadata, d_conv, s_conv);
for (i=0; i<ctx->nb_chapters; i++)
ff_metadata_conv(&ctx->chapters[i]->metadata, d_conv, s_conv);
for (i=0; i<ctx->nb_programs; i++)
ff_metadata_conv(&ctx->programs[i]->metadata, d_conv, s_conv);
}
void av_metadata_copy(AVMetadata **dst, AVMetadata *src, int flags)
{
AVMetadataTag *t = NULL;
while ((t = av_metadata_get(src, "", t, AV_METADATA_IGNORE_SUFFIX)))
av_metadata_set2(dst, t->key, t->value, flags);
}
|
