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2ba45a60 DM |
1 | /* |
2 | * Icecast protocol for FFmpeg | |
3 | * Copyright (c) 2014 Marvin Scholz | |
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 | ||
23 | #include "libavutil/avstring.h" | |
24 | #include "libavutil/bprint.h" | |
25 | #include "libavutil/opt.h" | |
26 | ||
27 | #include "avformat.h" | |
28 | #include "network.h" | |
29 | ||
30 | ||
31 | typedef struct IcecastContext { | |
32 | const AVClass *class; | |
33 | URLContext *hd; | |
34 | int send_started; | |
35 | char *user; | |
36 | // Options | |
37 | char *content_type; | |
38 | char *description; | |
39 | char *genre; | |
40 | int legacy_icecast; | |
41 | char *name; | |
42 | char *pass; | |
43 | int public; | |
44 | char *url; | |
45 | char *user_agent; | |
46 | } IcecastContext; | |
47 | ||
48 | #define DEFAULT_ICE_USER "source" | |
49 | ||
50 | #define NOT_EMPTY(s) (s && s[0]) | |
51 | ||
52 | #define OFFSET(x) offsetof(IcecastContext, x) | |
53 | #define E AV_OPT_FLAG_ENCODING_PARAM | |
54 | ||
55 | static const AVOption options[] = { | |
56 | { "ice_genre", "set stream genre", OFFSET(genre), AV_OPT_TYPE_STRING, { 0 }, 0, 0, E }, | |
57 | { "ice_name", "set stream description", OFFSET(name), AV_OPT_TYPE_STRING, { 0 }, 0, 0, E }, | |
58 | { "ice_description", "set stream description", OFFSET(description), AV_OPT_TYPE_STRING, { 0 }, 0, 0, E }, | |
59 | { "ice_url", "set stream website", OFFSET(url), AV_OPT_TYPE_STRING, { 0 }, 0, 0, E }, | |
60 | { "ice_public", "set if stream is public", OFFSET(public), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, E }, | |
61 | { "user_agent", "override User-Agent header", OFFSET(user_agent), AV_OPT_TYPE_STRING, { 0 }, 0, 0, E }, | |
62 | { "password", "set password", OFFSET(pass), AV_OPT_TYPE_STRING, { 0 }, 0, 0, E }, | |
63 | { "content_type", "set content-type, MUST be set if not audio/mpeg", OFFSET(content_type), AV_OPT_TYPE_STRING, { 0 }, 0, 0, E }, | |
64 | { "legacy_icecast", "use legacy SOURCE method, for Icecast < v2.4", OFFSET(legacy_icecast), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, E }, | |
65 | { NULL } | |
66 | }; | |
67 | ||
68 | ||
69 | static void cat_header(AVBPrint *bp, const char key[], const char value[]) | |
70 | { | |
71 | if (NOT_EMPTY(value)) | |
72 | av_bprintf(bp, "%s: %s\r\n", key, value); | |
73 | } | |
74 | ||
75 | static int icecast_close(URLContext *h) | |
76 | { | |
77 | IcecastContext *s = h->priv_data; | |
78 | if (s->hd) | |
79 | ffurl_close(s->hd); | |
80 | return 0; | |
81 | } | |
82 | ||
83 | static int icecast_open(URLContext *h, const char *uri, int flags) | |
84 | { | |
85 | IcecastContext *s = h->priv_data; | |
86 | ||
87 | // Dict to set options that we pass to the HTTP protocol | |
88 | AVDictionary *opt_dict = NULL; | |
89 | ||
90 | // URI part variables | |
91 | char h_url[1024], host[1024], auth[1024], path[1024]; | |
92 | char *headers = NULL, *user = NULL; | |
93 | int port, ret; | |
94 | AVBPrint bp; | |
95 | ||
96 | if (flags & AVIO_FLAG_READ) | |
97 | return AVERROR(ENOSYS); | |
98 | ||
99 | av_bprint_init(&bp, 0, 1); | |
100 | ||
101 | // Build header strings | |
102 | cat_header(&bp, "Ice-Name", s->name); | |
103 | cat_header(&bp, "Ice-Description", s->description); | |
104 | cat_header(&bp, "Ice-URL", s->url); | |
105 | cat_header(&bp, "Ice-Genre", s->genre); | |
106 | cat_header(&bp, "Ice-Public", s->public ? "1" : "0"); | |
107 | if (!av_bprint_is_complete(&bp)) { | |
108 | ret = AVERROR(ENOMEM); | |
109 | goto cleanup; | |
110 | } | |
111 | av_bprint_finalize(&bp, &headers); | |
112 | ||
113 | // Set options | |
114 | av_dict_set(&opt_dict, "method", s->legacy_icecast ? "SOURCE" : "PUT", 0); | |
115 | av_dict_set(&opt_dict, "auth_type", "basic", 0); | |
116 | av_dict_set(&opt_dict, "headers", headers, 0); | |
117 | if (NOT_EMPTY(s->content_type)) | |
118 | av_dict_set(&opt_dict, "content_type", s->content_type, 0); | |
119 | if (NOT_EMPTY(s->user_agent)) | |
120 | av_dict_set(&opt_dict, "user_agent", s->user_agent, 0); | |
121 | ||
122 | // Parse URI | |
123 | av_url_split(NULL, 0, auth, sizeof(auth), host, sizeof(host), | |
124 | &port, path, sizeof(path), uri); | |
125 | ||
126 | // Check for auth data in URI | |
127 | if (auth[0]) { | |
128 | char *sep = strchr(auth, ':'); | |
129 | if (sep) { | |
130 | *sep = 0; | |
131 | sep++; | |
132 | if (s->pass) { | |
133 | av_free(s->pass); | |
134 | av_log(h, AV_LOG_WARNING, "Overwriting -password <pass> with URI password!\n"); | |
135 | } | |
136 | if (!(s->pass = av_strdup(sep))) { | |
137 | ret = AVERROR(ENOMEM); | |
138 | goto cleanup; | |
139 | } | |
140 | } | |
141 | if (!(user = av_strdup(auth))) { | |
142 | ret = AVERROR(ENOMEM); | |
143 | goto cleanup; | |
144 | } | |
145 | } | |
146 | ||
147 | // Build new authstring | |
148 | snprintf(auth, sizeof(auth), | |
149 | "%s:%s", | |
150 | user ? user : DEFAULT_ICE_USER, | |
151 | s->pass ? s->pass : ""); | |
152 | ||
153 | // Check for mountpoint (path) | |
154 | if (!path[0] || strcmp(path, "/") == 0) { | |
155 | av_log(h, AV_LOG_ERROR, "No mountpoint (path) specified!\n"); | |
156 | ret = AVERROR(EIO); | |
157 | goto cleanup; | |
158 | } | |
159 | ||
160 | // Build new URI for passing to http protocol | |
161 | ff_url_join(h_url, sizeof(h_url), "http", auth, host, port, "%s", path); | |
162 | // Finally open http proto handler | |
163 | ret = ffurl_open(&s->hd, h_url, AVIO_FLAG_READ_WRITE, NULL, &opt_dict); | |
164 | ||
165 | cleanup: | |
166 | av_freep(&user); | |
167 | av_freep(&headers); | |
168 | av_dict_free(&opt_dict); | |
169 | ||
170 | return ret; | |
171 | } | |
172 | ||
173 | static int icecast_write(URLContext *h, const uint8_t *buf, int size) | |
174 | { | |
175 | IcecastContext *s = h->priv_data; | |
176 | if (!s->send_started) { | |
177 | s->send_started = 1; | |
178 | if (!s->content_type && size >= 8) { | |
179 | static const uint8_t oggs[4] = { 0x4F, 0x67, 0x67, 0x53 }; | |
180 | static const uint8_t webm[4] = { 0x1A, 0x45, 0xDF, 0xA3 }; | |
181 | static const uint8_t opus[8] = { 0x4F, 0x70, 0x75, 0x73, 0x48, 0x65, 0x61, 0x64 }; | |
182 | if (memcmp(buf, oggs, sizeof(oggs)) == 0) { | |
183 | av_log(h, AV_LOG_WARNING, "Streaming Ogg but appropriate content type NOT set!\n"); | |
184 | av_log(h, AV_LOG_WARNING, "Set it with -content_type application/ogg\n"); | |
185 | } else if (memcmp(buf, opus, sizeof(opus)) == 0) { | |
186 | av_log(h, AV_LOG_WARNING, "Streaming Opus but appropriate content type NOT set!\n"); | |
187 | av_log(h, AV_LOG_WARNING, "Set it with -content_type audio/ogg\n"); | |
188 | } else if (memcmp(buf, webm, sizeof(webm)) == 0) { | |
189 | av_log(h, AV_LOG_WARNING, "Streaming WebM but appropriate content type NOT set!\n"); | |
190 | av_log(h, AV_LOG_WARNING, "Set it with -content_type video/webm\n"); | |
191 | } else { | |
192 | av_log(h, AV_LOG_WARNING, "It seems you are streaming an unsupported format.\n"); | |
193 | av_log(h, AV_LOG_WARNING, "It might work, but is not officially supported in Icecast!\n"); | |
194 | } | |
195 | } | |
196 | } | |
197 | return ffurl_write(s->hd, buf, size); | |
198 | } | |
199 | ||
200 | static const AVClass icecast_context_class = { | |
201 | .class_name = "icecast", | |
202 | .item_name = av_default_item_name, | |
203 | .option = options, | |
204 | .version = LIBAVUTIL_VERSION_INT, | |
205 | }; | |
206 | ||
207 | URLProtocol ff_icecast_protocol = { | |
208 | .name = "icecast", | |
209 | .url_open = icecast_open, | |
210 | .url_write = icecast_write, | |
211 | .url_close = icecast_close, | |
212 | .priv_data_size = sizeof(IcecastContext), | |
213 | .priv_data_class = &icecast_context_class, | |
214 | .flags = URL_PROTOCOL_FLAG_NETWORK, | |
215 | }; |