2 * Copyright (c) 2012 Nicolas George
4 * This file is part of FFmpeg.
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public License
8 * as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public License
17 * along with FFmpeg; if not, write to the Free Software Foundation, Inc.,
18 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 #include "libavutil/avstring.h"
23 #include "libavutil/base64.h"
33 static av_cold
int data_open(URLContext
*h
, const char *uri
, int flags
)
35 DataContext
*dc
= h
->priv_data
;
36 const char *data
, *opt
, *next
;
41 /* data:content/type[;base64],payload */
43 av_strstart(uri
, "data:", &uri
);
44 data
= strchr(uri
, ',');
46 av_log(h
, AV_LOG_ERROR
, "No ',' delimiter in URI\n");
47 return AVERROR(EINVAL
);
51 next
= av_x_if_null(memchr(opt
, ';', data
- opt
), data
);
53 if (!memchr(opt
, '/', next
- opt
)) { /* basic validity check */
54 av_log(h
, AV_LOG_ERROR
, "Invalid content-type '%.*s'\n",
55 (int)(next
- opt
), opt
);
56 return AVERROR(EINVAL
);
58 av_log(h
, AV_LOG_VERBOSE
, "Content-type: %.*s\n",
59 (int)(next
- opt
), opt
);
61 if (!av_strncasecmp(opt
, "base64", next
- opt
)) {
64 av_log(h
, AV_LOG_VERBOSE
, "Ignoring option '%.*s'\n",
65 (int)(next
- opt
), opt
);
72 in_size
= strlen(data
);
74 size_t out_size
= 3 * (in_size
/ 4) + 1;
76 if (out_size
> INT_MAX
|| !(ddata
= av_malloc(out_size
)))
77 return AVERROR(ENOMEM
);
78 if ((ret
= av_base64_decode(ddata
, data
, out_size
)) < 0) {
80 av_log(h
, AV_LOG_ERROR
, "Invalid base64 in URI\n");
83 dc
->data
= dc
->tofree
= ddata
;
92 static av_cold
int data_close(URLContext
*h
)
94 DataContext
*dc
= h
->priv_data
;
96 av_freep(&dc
->tofree
);
100 static int data_read(URLContext
*h
, unsigned char *buf
, int size
)
102 DataContext
*dc
= h
->priv_data
;
104 if (dc
->pos
>= dc
->size
)
106 size
= FFMIN(size
, dc
->size
- dc
->pos
);
107 memcpy(buf
, dc
->data
+ dc
->pos
, size
);
112 URLProtocol ff_data_protocol
= {
114 .url_open
= data_open
,
115 .url_close
= data_close
,
116 .url_read
= data_read
,
117 .priv_data_size
= sizeof(DataContext
),