| 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 | }; |