/* * RTMP network protocol * Copyright (c) 2010 Howard Chu * * This file is part of Libav. * * Libav 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. * * Libav 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 Libav; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ /** * @file * RTMP protocol based on http://rtmpdump.mplayerhq.hu/ librtmp */ #include "libavutil/avstring.h" #include "libavutil/mathematics.h" #include "libavutil/opt.h" #include "avformat.h" #include "url.h" #include <librtmp/rtmp.h> #include <librtmp/log.h> typedef struct LibRTMPContext { const AVClass *class; RTMP rtmp; char *app; char *playpath; } LibRTMPContext; static void rtmp_log(int level, const char *fmt, va_list args) { switch (level) { default: case RTMP_LOGCRIT: level = AV_LOG_FATAL; break; case RTMP_LOGERROR: level = AV_LOG_ERROR; break; case RTMP_LOGWARNING: level = AV_LOG_WARNING; break; case RTMP_LOGINFO: level = AV_LOG_INFO; break; case RTMP_LOGDEBUG: level = AV_LOG_VERBOSE; break; case RTMP_LOGDEBUG2: level = AV_LOG_DEBUG; break; } av_vlog(NULL, level, fmt, args); av_log(NULL, level, "\n"); } static int rtmp_close(URLContext *s) { LibRTMPContext *ctx = s->priv_data; RTMP *r = &ctx->rtmp; RTMP_Close(r); return 0; } /** * Open RTMP connection and verify that the stream can be played. * * URL syntax: rtmp://server[:port][/app][/playpath][ keyword=value]... * where 'app' is first one or two directories in the path * (e.g. /ondemand/, /flash/live/, etc.) * and 'playpath' is a file name (the rest of the path, * may be prefixed with "mp4:") * * Additional RTMP library options may be appended as * space-separated key-value pairs. */ static int rtmp_open(URLContext *s, const char *uri, int flags) { LibRTMPContext *ctx = s->priv_data; RTMP *r = &ctx->rtmp; int rc = 0, level; char *filename = s->filename; switch (av_log_get_level()) { default: case AV_LOG_FATAL: level = RTMP_LOGCRIT; break; case AV_LOG_ERROR: level = RTMP_LOGERROR; break; case AV_LOG_WARNING: level = RTMP_LOGWARNING; break; case AV_LOG_INFO: level = RTMP_LOGINFO; break; case AV_LOG_VERBOSE: level = RTMP_LOGDEBUG; break; case AV_LOG_DEBUG: level = RTMP_LOGDEBUG2; break; } RTMP_LogSetLevel(level); RTMP_LogSetCallback(rtmp_log); if (ctx->app || ctx->playpath) { int len = strlen(s->filename) + 1; if (ctx->app) len += strlen(ctx->app) + sizeof(" app="); if (ctx->playpath) len += strlen(ctx->playpath) + sizeof(" playpath="); if (!(filename = av_malloc(len))) return AVERROR(ENOMEM); av_strlcpy(filename, s->filename, len); if (ctx->app) { av_strlcat(filename, " app=", len); av_strlcat(filename, ctx->app, len); } if (ctx->playpath) { av_strlcat(filename, " playpath=", len); av_strlcat(filename, ctx->playpath, len); } } RTMP_Init(r); if (!RTMP_SetupURL(r, filename)) { rc = AVERROR_UNKNOWN; goto fail; } if (flags & AVIO_FLAG_WRITE) RTMP_EnableWrite(r); if (!RTMP_Connect(r, NULL) || !RTMP_ConnectStream(r, 0)) { rc = AVERROR_UNKNOWN; goto fail; } s->is_streamed = 1; rc = 0; fail: if (filename != s->filename) av_freep(&filename); return rc; } static int rtmp_write(URLContext *s, const uint8_t *buf, int size) { LibRTMPContext *ctx = s->priv_data; RTMP *r = &ctx->rtmp; return RTMP_Write(r, buf, size); } static int rtmp_read(URLContext *s, uint8_t *buf, int size) { LibRTMPContext *ctx = s->priv_data; RTMP *r = &ctx->rtmp; return RTMP_Read(r, buf, size); } static int rtmp_read_pause(URLContext *s, int pause) { LibRTMPContext *ctx = s->priv_data; RTMP *r = &ctx->rtmp; if (!RTMP_Pause(r, pause)) return AVERROR_UNKNOWN; return 0; } static int64_t rtmp_read_seek(URLContext *s, int stream_index, int64_t timestamp, int flags) { LibRTMPContext *ctx = s->priv_data; RTMP *r = &ctx->rtmp; if (flags & AVSEEK_FLAG_BYTE) return AVERROR(ENOSYS); /* seeks are in milliseconds */ if (stream_index < 0) timestamp = av_rescale_rnd(timestamp, 1000, AV_TIME_BASE, flags & AVSEEK_FLAG_BACKWARD ? AV_ROUND_DOWN : AV_ROUND_UP); if (!RTMP_SendSeek(r, timestamp)) return AVERROR_UNKNOWN; return timestamp; } static int rtmp_get_file_handle(URLContext *s) { LibRTMPContext *ctx = s->priv_data; RTMP *r = &ctx->rtmp; return RTMP_Socket(r); } #define OFFSET(x) offsetof(LibRTMPContext, x) #define DEC AV_OPT_FLAG_DECODING_PARAM #define ENC AV_OPT_FLAG_ENCODING_PARAM static const AVOption options[] = { {"rtmp_app", "Name of application to connect to on the RTMP server", OFFSET(app), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, DEC|ENC}, {"rtmp_playpath", "Stream identifier to play or to publish", OFFSET(playpath), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, DEC|ENC}, { NULL }, }; #define RTMP_CLASS(flavor)\ static const AVClass lib ## flavor ## _class = {\ .class_name = "lib" #flavor " protocol",\ .item_name = av_default_item_name,\ .option = options,\ .version = LIBAVUTIL_VERSION_INT,\ }; RTMP_CLASS(rtmp) URLProtocol ff_librtmp_protocol = { .name = "rtmp", .url_open = rtmp_open, .url_read = rtmp_read, .url_write = rtmp_write, .url_close = rtmp_close, .url_read_pause = rtmp_read_pause, .url_read_seek = rtmp_read_seek, .url_get_file_handle = rtmp_get_file_handle, .priv_data_size = sizeof(LibRTMPContext), .priv_data_class = &librtmp_class, .flags = URL_PROTOCOL_FLAG_NETWORK, }; RTMP_CLASS(rtmpt) URLProtocol ff_librtmpt_protocol = { .name = "rtmpt", .url_open = rtmp_open, .url_read = rtmp_read, .url_write = rtmp_write, .url_close = rtmp_close, .url_read_pause = rtmp_read_pause, .url_read_seek = rtmp_read_seek, .url_get_file_handle = rtmp_get_file_handle, .priv_data_size = sizeof(LibRTMPContext), .priv_data_class = &librtmpt_class, .flags = URL_PROTOCOL_FLAG_NETWORK, }; RTMP_CLASS(rtmpe) URLProtocol ff_librtmpe_protocol = { .name = "rtmpe", .url_open = rtmp_open, .url_read = rtmp_read, .url_write = rtmp_write, .url_close = rtmp_close, .url_read_pause = rtmp_read_pause, .url_read_seek = rtmp_read_seek, .url_get_file_handle = rtmp_get_file_handle, .priv_data_size = sizeof(LibRTMPContext), .priv_data_class = &librtmpe_class, .flags = URL_PROTOCOL_FLAG_NETWORK, }; RTMP_CLASS(rtmpte) URLProtocol ff_librtmpte_protocol = { .name = "rtmpte", .url_open = rtmp_open, .url_read = rtmp_read, .url_write = rtmp_write, .url_close = rtmp_close, .url_read_pause = rtmp_read_pause, .url_read_seek = rtmp_read_seek, .url_get_file_handle = rtmp_get_file_handle, .priv_data_size = sizeof(LibRTMPContext), .priv_data_class = &librtmpte_class, .flags = URL_PROTOCOL_FLAG_NETWORK, }; RTMP_CLASS(rtmps) URLProtocol ff_librtmps_protocol = { .name = "rtmps", .url_open = rtmp_open, .url_read = rtmp_read, .url_write = rtmp_write, .url_close = rtmp_close, .url_read_pause = rtmp_read_pause, .url_read_seek = rtmp_read_seek, .url_get_file_handle = rtmp_get_file_handle, .priv_data_size = sizeof(LibRTMPContext), .priv_data_class = &librtmps_class, .flags = URL_PROTOCOL_FLAG_NETWORK, };