ffmpeg/libavformat/librtmp.c

366 lines
12 KiB
C

/*
* 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/bprint.h"
#include "libavutil/mathematics.h"
#include "libavutil/opt.h"
#include "avformat.h"
#if CONFIG_NETWORK
#include "network.h"
#endif
#include "url.h"
#include <librtmp/rtmp.h>
#include <librtmp/log.h>
typedef struct LibRTMPContext {
const AVClass *class;
AVBPrint filename;
RTMP rtmp;
char *app;
char *conn;
char *subscribe;
char *playpath;
char *tcurl;
char *flashver;
char *swfurl;
char *swfverify;
char *pageurl;
char *client_buffer_time;
int live;
int buffer_size;
} 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);
av_bprint_finalize(&ctx->filename, NULL);
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;
/* This needs to stay allocated for as long as the RTMP context exists. */
av_bprint_init(&ctx->filename, 0, AV_BPRINT_SIZE_UNLIMITED);
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);
av_bprintf(&ctx->filename, "%s", s->filename);
if (ctx->app)
av_bprintf(&ctx->filename, " app=%s", ctx->app);
if (ctx->tcurl)
av_bprintf(&ctx->filename, " tcUrl=%s", ctx->tcurl);
if (ctx->pageurl)
av_bprintf(&ctx->filename, " pageUrl=%s", ctx->pageurl);
if (ctx->swfurl)
av_bprintf(&ctx->filename, " swfUrl=%s", ctx->swfurl);
if (ctx->flashver)
av_bprintf(&ctx->filename, " flashVer=%s", ctx->flashver);
if (ctx->conn) {
char *sep, *p = ctx->conn;
while (p) {
av_bprintf(&ctx->filename, " conn=");
p += strspn(p, " ");
if (!*p)
break;
sep = strchr(p, ' ');
if (sep)
*sep = '\0';
av_bprintf(&ctx->filename, "%s", p);
if (sep)
p = sep + 1;
else
break;
}
}
if (ctx->playpath)
av_bprintf(&ctx->filename, " playpath=%s", ctx->playpath);
if (ctx->live)
av_bprintf(&ctx->filename, " live=1");
if (ctx->subscribe)
av_bprintf(&ctx->filename, " subscribe=%s", ctx->subscribe);
if (ctx->client_buffer_time)
av_bprintf(&ctx->filename, " buffer=%s", ctx->client_buffer_time);
if (ctx->swfurl || ctx->swfverify) {
if (ctx->swfverify)
av_bprintf(&ctx->filename, " swfUrl=%s swfVfy=1", ctx->swfverify);
else
av_bprintf(&ctx->filename, " swfUrl=%s", ctx->swfurl);
}
if (!av_bprint_is_complete(&ctx->filename)) {
av_bprint_finalize(&ctx->filename, NULL);
return AVERROR(ENOMEM);
}
RTMP_Init(r);
/* This will modify filename by null terminating the URL portion */
if (!RTMP_SetupURL(r, ctx->filename.str)) {
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;
}
#if CONFIG_NETWORK
if (ctx->buffer_size >= 0 && (flags & AVIO_FLAG_WRITE)) {
int tmp = ctx->buffer_size;
if (setsockopt(r->m_sb.sb_socket, SOL_SOCKET, SO_SNDBUF, &tmp, sizeof(tmp))) {
rc = AVERROR_EXTERNAL;
goto fail;
}
}
#endif
s->is_streamed = 1;
return 0;
fail:
if (rc)
RTMP_Close(r);
av_bprint_finalize(&ctx->filename, NULL);
return rc;
}
static int rtmp_write(URLContext *s, const uint8_t *buf, int size)
{
LibRTMPContext *ctx = s->priv_data;
RTMP *r = &ctx->rtmp;
int ret = RTMP_Write(r, buf, size);
if (!ret)
return AVERROR_EOF;
return ret;
}
static int rtmp_read(URLContext *s, uint8_t *buf, int size)
{
LibRTMPContext *ctx = s->priv_data;
RTMP *r = &ctx->rtmp;
int ret = RTMP_Read(r, buf, size);
if (!ret)
return AVERROR_EOF;
return ret;
}
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_buffer", "Set buffer time in milliseconds. The default is 3000.", OFFSET(client_buffer_time), AV_OPT_TYPE_STRING, {.str = "3000"}, 0, 0, DEC|ENC},
{"rtmp_conn", "Append arbitrary AMF data to the Connect message", OFFSET(conn), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, DEC|ENC},
{"rtmp_flashver", "Version of the Flash plugin used to run the SWF player.", OFFSET(flashver), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, DEC|ENC},
{"rtmp_live", "Specify that the media is a live stream.", OFFSET(live), AV_OPT_TYPE_INT, {.i64 = 0}, INT_MIN, INT_MAX, DEC, "rtmp_live"},
{"any", "both", 0, AV_OPT_TYPE_CONST, {.i64 = -2}, 0, 0, DEC, "rtmp_live"},
{"live", "live stream", 0, AV_OPT_TYPE_CONST, {.i64 = -1}, 0, 0, DEC, "rtmp_live"},
{"recorded", "recorded stream", 0, AV_OPT_TYPE_CONST, {.i64 = 0}, 0, 0, DEC, "rtmp_live"},
{"rtmp_pageurl", "URL of the web page in which the media was embedded. By default no value will be sent.", OFFSET(pageurl), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, DEC},
{"rtmp_playpath", "Stream identifier to play or to publish", OFFSET(playpath), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, DEC|ENC},
{"rtmp_subscribe", "Name of live stream to subscribe to. Defaults to rtmp_playpath.", OFFSET(subscribe), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, DEC},
{"rtmp_swfurl", "URL of the SWF player. By default no value will be sent", OFFSET(swfurl), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, DEC|ENC},
{"rtmp_swfverify", "URL to player swf file, compute hash/size automatically. (unimplemented)", OFFSET(swfverify), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, DEC},
{"rtmp_tcurl", "URL of the target stream. Defaults to proto://host[:port]/app.", OFFSET(tcurl), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, DEC|ENC},
#if CONFIG_NETWORK
{"rtmp_buffer_size", "set buffer size in bytes", OFFSET(buffer_size), AV_OPT_TYPE_INT, {.i64 = -1}, -1, INT_MAX, DEC|ENC },
#endif
{ 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)
const 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)
const 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)
const 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)
const 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)
const 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,
};