/*
* RTMP network protocol
* Copyright (c) 2010 Howard Chu
*
* 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
*/
/**
* @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,
};