Commit 67cbd828 authored by Justin Kim's avatar Justin Kim Committed by Jean-Baptiste Kempf

access_out:srt: introduce SRT ouput module

The access_output_srt module is a SRT client to send a stream.
Signed-off-by: default avatarJustin Kim <justin.kim@collabora.com>
Signed-off-by: Jean-Baptiste Kempf's avatarJean-Baptiste Kempf <jb@videolan.org>
parent f38c0bc9
......@@ -3887,7 +3887,7 @@ AM_CONDITIONAL([HAVE_LIRC], [test "${have_lirc}" = "yes"])
dnl
dnl SRT plugin
dnl
PKG_ENABLE_MODULES_VLC([SRT], [access_srt], [srt >= 1.2.0], [SRT input plugin], [auto])
PKG_ENABLE_MODULES_VLC([SRT], [access_srt access_output_srt], [srt >= 1.2.0], [SRT input/output plugin], [auto])
EXTEND_HELP_STRING([Visualisations and Video filter plugins:])
dnl
......
......@@ -14,6 +14,7 @@ $Id$
* access_output_http: HTTP Network access module
* access_output_livehttp: Live HTTP stream output
* access_output_shout: Shoutcast access output
* access_output_srt: SRT (Secure Reliable Transport) access_output module
* access_output_udp: UDP Network access_output module
* access_qtsound: Quicktime Audio Capture
* access_realrtsp: Real RTSP access
......
......@@ -26,3 +26,11 @@ libaccess_output_shout_plugin_la_LDFLAGS = $(AM_LDFLAGS) -rpath '$(access_outdir
libaccess_output_shout_plugin_la_LIBADD = $(SHOUT_LIBS) $(SOCKET_LIBS)
access_out_LTLIBRARIES += $(LTLIBaccess_output_shout)
EXTRA_LTLIBRARIES += libaccess_output_shout_plugin.la
### SRT ###
libaccess_output_srt_plugin_la_SOURCES = access_output/srt.c
libaccess_output_srt_plugin_la_CPPFLAGS = $(AM_CPPFLAGS) $(SRT_CPPFLAGS)
libaccess_output_srt_plugin_la_LIBADD = $(SRT_LIBS) $(LIBPTHREAD)
libaccess_output_srt_plugin_la_LDFLAGS = $(AM_LDFLAGS) -rpath '$(access_outdir)'
access_out_LTLIBRARIES += $(LTLIBaccess_output_srt)
EXTRA_LTLIBRARIES += libaccess_output_srt_plugin.la
/*****************************************************************************
* srt.c: SRT (Secure Reliable Transport) output module
*****************************************************************************
* Copyright (C) 2017, Collabora Ltd.
*
* Authors: Justin Kim <justin.kim@collabora.com>
*
* This program 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.
*
* This program 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 this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <errno.h>
#include <sys/eventfd.h>
#include <sys/epoll.h>
#include <vlc_common.h>
#include <vlc_interrupt.h>
#include <vlc_plugin.h>
#include <vlc_sout.h>
#include <vlc_block.h>
#include <vlc_network.h>
#include <srt/srt.h>
/* libsrt defines default packet size as 1316 internally
* so srt module takes same value. */
#define SRT_DEFAULT_CHUNK_SIZE 1316
/* libsrt tutorial uses 9000 as a default binding port */
#define SRT_DEFAULT_PORT 9000
/* The default timeout is -1 (infinite) */
#define SRT_DEFAULT_POLL_TIMEOUT 100
/* The default latency is 125
* which uses srt library internally */
#define SRT_DEFAULT_LATENCY 125
struct sout_access_out_sys_t
{
SRTSOCKET sock;
int i_poll_id;
int i_poll_timeout;
int i_latency;
size_t i_chunk_size;
int i_event_fd;
};
static void srt_wait_interrupted(void *p_data)
{
sout_access_out_t *p_access = p_data;
sout_access_out_sys_t *p_sys = p_access->p_sys;
msg_Dbg( p_access, "Waking up srt_epoll_wait");
if ( write( p_sys->i_event_fd, &( bool ) { true }, sizeof( bool ) ) < 0 )
{
msg_Err( p_access, "Failed to send data to event fd");
}
}
static ssize_t Write( sout_access_out_t *p_access, block_t *p_buffer )
{
sout_access_out_sys_t *p_sys = p_access->p_sys;
int i_len = 0;
vlc_interrupt_register( srt_wait_interrupted, p_access);
while( p_buffer )
{
block_t *p_next;
i_len += p_buffer->i_buffer;
while( p_buffer->i_buffer )
{
size_t i_write = __MIN( p_buffer->i_buffer, p_sys->i_chunk_size );
SRTSOCKET ready[2];
struct epoll_event event[1] = { 0 };
retry:
if ( srt_epoll_wait( p_sys->i_poll_id,
0, 0, ready, &(int){ 2 }, p_sys->i_poll_timeout,
&(int) { p_sys->i_event_fd }, &(int) { 1 }, 0, 0 ) == -1 )
{
/* Assuming that timeout error is normal when SRT socket is connected. */
if ( srt_getlasterror( NULL ) == SRT_ETIMEOUT &&
srt_getsockstate( p_sys->sock ) == SRTS_CONNECTED )
{
srt_clearlasterror();
goto retry;
}
i_len = VLC_EGENERIC;
goto out;
}
if ( event[0].events & EPOLLIN )
{
bool cancel = 0;
int ret = read( event[0].data.fd, &cancel, sizeof( bool ) );
if ( ret < 0 )
{
goto retry;
}
if ( cancel )
{
msg_Dbg( p_access, "Cancelled running" );
i_len = 0;
goto out;
}
}
if ( srt_sendmsg2( p_sys->sock, (char *)p_buffer->p_buffer, i_write, 0 ) == SRT_ERROR )
msg_Warn( p_access, "send error: %s", srt_getlasterror_str() );
p_buffer->p_buffer += i_write;
p_buffer->i_buffer -= i_write;
}
p_next = p_buffer->p_next;
block_Release( p_buffer );
p_buffer = p_next;
}
out:
vlc_interrupt_unregister();
if ( i_len <= 0 ) block_ChainRelease( p_buffer );
return i_len;
}
static int Control( sout_access_out_t *p_access, int i_query, va_list args )
{
sout_access_out_sys_t *p_sys = p_access->p_sys;
int i_ret = VLC_SUCCESS;
switch( i_query )
{
case ACCESS_OUT_CONTROLS_PACE:
*va_arg( args, bool * ) = false;
break;
default:
i_ret = VLC_EGENERIC;
break;
}
return i_ret;
}
static int Open( vlc_object_t *p_this )
{
sout_access_out_t *p_access = (sout_access_out_t*)p_this;
sout_access_out_sys_t *p_sys = NULL;
char *psz_dst_addr = NULL;
int i_dst_port;
int stat;
struct addrinfo hints = {
.ai_socktype = SOCK_DGRAM,
}, *res = NULL;
if (var_Create ( p_access, "dst-port", VLC_VAR_INTEGER )
|| var_Create ( p_access, "src-port", VLC_VAR_INTEGER )
|| var_Create ( p_access, "dst-addr", VLC_VAR_STRING )
|| var_Create ( p_access, "src-addr", VLC_VAR_STRING ) )
{
msg_Err( p_access, "Valid network information is required." );
return VLC_ENOMEM;
}
if( !( p_sys = malloc ( sizeof( *p_sys ) ) ) )
return VLC_ENOMEM;
p_sys->i_chunk_size = var_InheritInteger( p_access, "chunk-size" );
p_sys->i_poll_timeout = var_InheritInteger( p_access, "poll-timeout" );
p_sys->i_latency = var_InheritInteger( p_stream, "latency" );
p_sys->i_poll_id = -1;
p_sys->i_event_fd = -1;
p_access->p_sys = p_sys;
i_dst_port = SRT_DEFAULT_PORT;
char *psz_parser = psz_dst_addr = strdup( p_access->psz_path );
if( !psz_dst_addr )
{
free( p_sys );
return VLC_ENOMEM;
}
if (psz_parser[0] == '[')
psz_parser = strchr (psz_parser, ']');
psz_parser = strchr (psz_parser ? psz_parser : psz_dst_addr, ':');
if (psz_parser != NULL)
{
*psz_parser++ = '\0';
i_dst_port = atoi (psz_parser);
}
msg_Dbg( p_access, "Setting SRT socket (dest addresss: %s, port: %d).",
psz_dst_addr, i_dst_port );
stat = vlc_getaddrinfo( psz_dst_addr, i_dst_port, &hints, &res );
if ( stat )
{
msg_Err( p_access, "Cannot resolve [%s]:%d (reason: %s)",
psz_dst_addr,
i_dst_port,
gai_strerror( stat ) );
goto failed;
}
p_sys->sock = srt_socket( res->ai_family, SOCK_DGRAM, 0 );
if ( p_sys->sock == SRT_ERROR )
{
msg_Err( p_access, "Failed to open socket." );
goto failed;
}
/* Make SRT non-blocking */
srt_setsockopt( p_sys->sock, 0, SRTO_SNDSYN, &(bool) { false }, sizeof( bool ) );
/* Make sure TSBPD mode is enable (SRT mode) */
srt_setsockopt( p_sys->sock, 0, SRTO_TSBPDMODE, &(int) { 1 }, sizeof( int ) );
/* This is an access_out so it is always a sender */
srt_setsockopt( p_sys->sock, 0, SRTO_SENDER, &(int) { 1 }, sizeof( int ) );
/* Set latency */
srt_setsockopt( p_sys->sock, 0, SRTO_TSBPDDELAY, &p_sys->latency, sizeof( int ) );
p_sys->i_poll_id = srt_epoll_create();
if ( p_sys->i_poll_id == -1 )
{
msg_Err( p_access, "Failed to create poll id for SRT socket (reason: %s)",
srt_getlasterror_str() );
goto failed;
}
srt_epoll_add_usock( p_sys->i_poll_id, p_sys->sock, &(int) { SRT_EPOLL_OUT });
srt_setsockopt( p_sys->sock, 0, SRTO_SENDER, &(int) { 1 }, sizeof(int) );
p_sys->i_event_fd = eventfd( 0, EFD_NONBLOCK | EFD_CLOEXEC );
srt_epoll_add_ssock( p_sys->i_poll_id, p_sys->i_event_fd, &(int) { EPOLLIN } );
stat = srt_connect( p_sys->sock, res->ai_addr, sizeof (struct sockaddr));
if ( stat == SRT_ERROR )
{
msg_Err( p_access, "Failed to connect to server (reason: %s)",
srt_getlasterror_str() );
goto failed;
}
p_access->pf_write = Write;
p_access->pf_control = Control;
free( psz_dst_addr );
freeaddrinfo( res );
return VLC_SUCCESS;
failed:
if ( psz_dst_addr != NULL)
free( psz_dst_addr );
if ( res != NULL )
freeaddrinfo( res );
if ( p_sys != NULL )
{
if ( p_sys->i_poll_id != -1 ) srt_epoll_release( p_sys->i_poll_id );
if ( p_sys->sock != -1 ) srt_close( p_sys->sock );
if ( p_sys->i_event_fd != -1 ) close( p_sys->i_event_fd );
free( p_sys );
}
return VLC_EGENERIC;
}
static void Close( vlc_object_t * p_this )
{
sout_access_out_t *p_access = (sout_access_out_t*)p_this;
sout_access_out_sys_t *p_sys = p_access->p_sys;
srt_epoll_release( p_sys->i_poll_id );
srt_close( p_sys->sock );
if ( p_sys->i_event_fd != -1 )
{
close( p_sys->i_event_fd );
p_sys->i_event_fd = -1;
}
free( p_sys );
}
/* Module descriptor */
vlc_module_begin()
set_shortname( N_("SRT") )
set_description( N_("SRT stream output") )
set_category( CAT_SOUT )
set_subcategory( SUBCAT_SOUT_ACO )
add_integer( "chunk-size", SRT_DEFAULT_CHUNK_SIZE,
N_("SRT chunk size (bytes)"), NULL, true )
add_integer( "poll-timeout", SRT_DEFAULT_POLL_TIMEOUT,
N_("Return poll wait after timeout miliseconds (-1 = infinite)"), NULL, true )
add_integer( "latency", SRT_DEFAULT_LATENCY, N_("SRT latency (ms)"), NULL, true )
set_capability( "sout access", 0 )
add_shortcut( "srt" )
set_callbacks( Open, Close )
vlc_module_end ()
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