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
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
|
/*
* Icecast protocol for FFmpeg
* Copyright (c) 2014 Marvin Scholz
*
* This file is part of FFmpeg.
*
* FFmpeg 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.
*
* FFmpeg 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 FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libavutil/avstring.h"
#include "libavutil/bprint.h"
#include "libavutil/opt.h"
#include "avformat.h"
#include "network.h"
typedef struct IcecastContext {
const AVClass *class;
URLContext *hd;
int send_started;
char *user;
// Options
char *content_type;
char *description;
char *genre;
int legacy_icecast;
char *name;
char *pass;
int public;
char *url;
char *user_agent;
} IcecastContext;
#define DEFAULT_ICE_USER "source"
#define NOT_EMPTY(s) (s && s[0])
#define OFFSET(x) offsetof(IcecastContext, x)
#define E AV_OPT_FLAG_ENCODING_PARAM
static const AVOption options[] = {
{ "ice_genre", "set stream genre", OFFSET(genre), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, E },
{ "ice_name", "set stream description", OFFSET(name), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, E },
{ "ice_description", "set stream description", OFFSET(description), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, E },
{ "ice_url", "set stream website", OFFSET(url), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, E },
{ "ice_public", "set if stream is public", OFFSET(public), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
{ "user_agent", "override User-Agent header", OFFSET(user_agent), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, E },
{ "password", "set password", OFFSET(pass), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, E },
{ "content_type", "set content-type, MUST be set if not audio/mpeg", OFFSET(content_type), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, E },
{ "legacy_icecast", "use legacy SOURCE method, for Icecast < v2.4", OFFSET(legacy_icecast), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, E },
{ NULL }
};
static void cat_header(AVBPrint *bp, const char key[], const char value[])
{
if (NOT_EMPTY(value))
av_bprintf(bp, "%s: %s\r\n", key, value);
}
static int icecast_close(URLContext *h)
{
IcecastContext *s = h->priv_data;
if (s->hd)
ffurl_close(s->hd);
return 0;
}
static int icecast_open(URLContext *h, const char *uri, int flags)
{
IcecastContext *s = h->priv_data;
// Dict to set options that we pass to the HTTP protocol
AVDictionary *opt_dict = NULL;
// URI part variables
char h_url[1024], host[1024], auth[1024], path[1024];
char *headers, *user = NULL;
int port, ret;
AVBPrint bp;
if (flags & AVIO_FLAG_READ)
return AVERROR(ENOSYS);
av_bprint_init(&bp, 0, AV_BPRINT_SIZE_AUTOMATIC);
// Build header strings
cat_header(&bp, "Ice-Name", s->name);
cat_header(&bp, "Ice-Description", s->description);
cat_header(&bp, "Ice-URL", s->url);
cat_header(&bp, "Ice-Genre", s->genre);
cat_header(&bp, "Ice-Public", s->public ? "1" : "0");
if (!av_bprint_is_complete(&bp)) {
av_bprint_finalize(&bp, NULL);
return AVERROR(ENOMEM);
}
if ((ret = av_bprint_finalize(&bp, &headers)) < 0)
return ret;
// Set options
av_dict_set(&opt_dict, "method", s->legacy_icecast ? "SOURCE" : "PUT", 0);
av_dict_set(&opt_dict, "auth_type", "basic", 0);
av_dict_set(&opt_dict, "headers", headers, AV_DICT_DONT_STRDUP_VAL);
av_dict_set(&opt_dict, "chunked_post", "0", 0);
av_dict_set(&opt_dict, "send_expect_100", s->legacy_icecast ? "-1" : "1", 0);
if (NOT_EMPTY(s->content_type))
av_dict_set(&opt_dict, "content_type", s->content_type, 0);
else
av_dict_set(&opt_dict, "content_type", "audio/mpeg", 0);
if (NOT_EMPTY(s->user_agent))
av_dict_set(&opt_dict, "user_agent", s->user_agent, 0);
// Parse URI
av_url_split(NULL, 0, auth, sizeof(auth), host, sizeof(host),
&port, path, sizeof(path), uri);
// Check for auth data in URI
if (auth[0]) {
char *sep = strchr(auth, ':');
if (sep) {
*sep = 0;
sep++;
if (s->pass) {
av_free(s->pass);
av_log(h, AV_LOG_WARNING, "Overwriting -password <pass> with URI password!\n");
}
if (!(s->pass = av_strdup(sep))) {
ret = AVERROR(ENOMEM);
goto cleanup;
}
}
if (!(user = av_strdup(auth))) {
ret = AVERROR(ENOMEM);
goto cleanup;
}
}
// Build new authstring
snprintf(auth, sizeof(auth),
"%s:%s",
user ? user : DEFAULT_ICE_USER,
s->pass ? s->pass : "");
// Check for mountpoint (path)
if (!path[0] || strcmp(path, "/") == 0) {
av_log(h, AV_LOG_ERROR, "No mountpoint (path) specified!\n");
ret = AVERROR(EIO);
goto cleanup;
}
// Build new URI for passing to http protocol
ff_url_join(h_url, sizeof(h_url), "http", auth, host, port, "%s", path);
// Finally open http proto handler
ret = ffurl_open_whitelist(&s->hd, h_url, AVIO_FLAG_READ_WRITE, NULL,
&opt_dict, h->protocol_whitelist, h->protocol_blacklist, h);
cleanup:
av_freep(&user);
av_dict_free(&opt_dict);
return ret;
}
static int icecast_write(URLContext *h, const uint8_t *buf, int size)
{
IcecastContext *s = h->priv_data;
if (!s->send_started) {
s->send_started = 1;
if (!s->content_type && size >= 8) {
static const uint8_t oggs[4] = { 0x4F, 0x67, 0x67, 0x53 };
static const uint8_t webm[4] = { 0x1A, 0x45, 0xDF, 0xA3 };
static const uint8_t opus[8] = { 0x4F, 0x70, 0x75, 0x73, 0x48, 0x65, 0x61, 0x64 };
if (memcmp(buf, oggs, sizeof(oggs)) == 0) {
av_log(h, AV_LOG_WARNING, "Streaming Ogg but appropriate content type NOT set!\n");
av_log(h, AV_LOG_WARNING, "Set it with -content_type application/ogg\n");
} else if (memcmp(buf, opus, sizeof(opus)) == 0) {
av_log(h, AV_LOG_WARNING, "Streaming Opus but appropriate content type NOT set!\n");
av_log(h, AV_LOG_WARNING, "Set it with -content_type audio/ogg\n");
} else if (memcmp(buf, webm, sizeof(webm)) == 0) {
av_log(h, AV_LOG_WARNING, "Streaming WebM but appropriate content type NOT set!\n");
av_log(h, AV_LOG_WARNING, "Set it with -content_type video/webm\n");
} else {
av_log(h, AV_LOG_WARNING, "It seems you are streaming an unsupported format.\n");
av_log(h, AV_LOG_WARNING, "It might work, but is not officially supported in Icecast!\n");
}
}
}
return ffurl_write(s->hd, buf, size);
}
static const AVClass icecast_context_class = {
.class_name = "icecast",
.item_name = av_default_item_name,
.option = options,
.version = LIBAVUTIL_VERSION_INT,
};
const URLProtocol ff_icecast_protocol = {
.name = "icecast",
.url_open = icecast_open,
.url_write = icecast_write,
.url_close = icecast_close,
.priv_data_size = sizeof(IcecastContext),
.priv_data_class = &icecast_context_class,
.flags = URL_PROTOCOL_FLAG_NETWORK,
};
|
