1 /*
2 * Tee output protocol
3 * Copyright (c) 2016 Michael Niedermayer
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 #include "libavutil/avstring.h"
23 #include "libavutil/opt.h"
24 #include "avformat.h"
25 #include "avio_internal.h"
26 #include "tee_common.h"
27
28 typedef struct ChildContext {
29 URLContext *url_context;
30 } ChildContext;
31
32 typedef struct TeeContext {
33 const AVClass *class;
34 int child_count;
35 ChildContext *child;
36 } TeeContext;
37
38 static const AVOption tee_options[] = {
39 { NULL }
40 };
41
42 static const AVClass tee_class = {
43 .class_name = "tee",
44 .item_name = av_default_item_name,
45 .option = tee_options,
46 .version = LIBAVUTIL_VERSION_INT,
47 };
48
49 static const char *const child_delim = "|";
50
tee_write(URLContext * h,const unsigned char * buf,int size)51 static int tee_write(URLContext *h, const unsigned char *buf, int size)
52 {
53 TeeContext *c = h->priv_data;
54 int i;
55 int main_ret = size;
56
57 for (i=0; i<c->child_count; i++) {
58 int ret = ffurl_write(c->child[i].url_context, buf, size);
59 if (ret < 0)
60 main_ret = ret;
61 }
62 return main_ret;
63 }
64
tee_close(URLContext * h)65 static int tee_close(URLContext *h)
66 {
67 TeeContext *c = h->priv_data;
68 int i;
69 int main_ret = 0;
70
71 for (i=0; i<c->child_count; i++) {
72 int ret = ffurl_closep(&c->child[i].url_context);
73 if (ret < 0)
74 main_ret = ret;
75 }
76
77 av_freep(&c->child);
78 c->child_count = 0;
79 return main_ret;
80 }
81
tee_open(URLContext * h,const char * filename,int flags)82 static int tee_open(URLContext *h, const char *filename, int flags)
83 {
84 TeeContext *c = h->priv_data;
85 int ret, i;
86
87 av_strstart(filename, "tee:", &filename);
88
89 if (flags & AVIO_FLAG_READ)
90 return AVERROR(ENOSYS);
91
92 while (*filename) {
93 char *child_string = av_get_token(&filename, child_delim);
94 char *child_name = NULL;
95 void *tmp;
96 AVDictionary *options = NULL;
97 if (!child_string) {
98 ret = AVERROR(ENOMEM);
99 goto fail;
100 }
101
102 tmp = av_realloc_array(c->child, c->child_count + 1, sizeof(*c->child));
103 if (!tmp) {
104 ret = AVERROR(ENOMEM);
105 goto loop_fail;
106 }
107 c->child = tmp;
108 memset(&c->child[c->child_count], 0, sizeof(c->child[c->child_count]));
109
110 ret = ff_tee_parse_slave_options(h, child_string, &options, &child_name);
111 if (ret < 0)
112 goto loop_fail;
113
114 ret = ffurl_open_whitelist(&c->child[c->child_count].url_context, child_name, flags,
115 &h->interrupt_callback, &options,
116 h->protocol_whitelist, h->protocol_blacklist,
117 h);
118 loop_fail:
119 av_freep(&child_string);
120 av_dict_free(&options);
121 if (ret < 0)
122 goto fail;
123 c->child_count++;
124
125 if (strspn(filename, child_delim))
126 filename++;
127 }
128
129 h->is_streamed = 0;
130 for (i=0; i<c->child_count; i++) {
131 h->is_streamed |= c->child[i].url_context->is_streamed;
132 }
133
134 return 0;
135 fail:
136 tee_close(h);
137 return ret;
138 }
139 const URLProtocol ff_tee_protocol = {
140 .name = "tee",
141 .url_open = tee_open,
142 .url_write = tee_write,
143 .url_close = tee_close,
144 .priv_data_size = sizeof(TeeContext),
145 .priv_data_class = &tee_class,
146 .default_whitelist = "crypto,file,http,https,httpproxy,rtmp,tcp,tls"
147 };
148