/*****************************************************************************
- * udp.c: raw UDP access plug-in
+ * udp.c: raw UDP & RTP input module
*****************************************************************************
- * Copyright (C) 2001, 2002 VideoLAN
- * $Id: udp.c,v 1.3 2002/09/30 11:05:34 sam Exp $
+ * Copyright (C) 2001-2004 VideoLAN
+ * $Id$
*
* Authors: Christophe Massiot <massiot@via.ecp.fr>
+ * Tristan Leteurtre <tooney@via.ecp.fr>
+ * Laurent Aimar <fenrir@via.ecp.fr>
+ *
+ * Reviewed: 23 October 2003, Jean-Paul Saman <jpsaman@wxs.nl>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 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
* Preamble
*****************************************************************************/
#include <stdlib.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <string.h>
-#include <errno.h>
-#include <fcntl.h>
#include <vlc/vlc.h>
#include <vlc/input.h>
-#ifdef HAVE_UNISTD_H
-# include <unistd.h>
-#elif defined( _MSC_VER ) && defined( _WIN32 )
-# include <io.h>
-#endif
-
#include "network.h"
-/*****************************************************************************
- * Local prototypes
- *****************************************************************************/
-static int Open ( vlc_object_t * );
-
/*****************************************************************************
* Module descriptor
*****************************************************************************/
+#define CACHING_TEXT N_("Caching value in ms")
+#define CACHING_LONGTEXT N_( \
+ "Allows you to modify the default caching value for UDP streams. This " \
+ "value should be set in millisecond units." )
+
+static int Open ( vlc_object_t * );
+static void Close( vlc_object_t * );
+
vlc_module_begin();
- set_description( _("raw UDP access module") );
+ set_description( _("UDP/RTP input") );
+
+ add_integer( "udp-caching", DEFAULT_PTS_DELAY / 1000, NULL, CACHING_TEXT,
+ CACHING_LONGTEXT, VLC_TRUE );
+
set_capability( "access", 0 );
add_shortcut( "udp" );
add_shortcut( "udpstream" );
add_shortcut( "udp4" );
add_shortcut( "udp6" );
- set_callbacks( Open, __input_FDNetworkClose );
+ add_shortcut( "rtp" );
+ add_shortcut( "rtp4" );
+ add_shortcut( "rtp6" );
+ set_callbacks( Open, Close );
vlc_module_end();
+/*****************************************************************************
+ * Local prototypes
+ *****************************************************************************/
+#define RTP_HEADER_LEN 12
+
+static ssize_t Read ( input_thread_t *, byte_t *, size_t );
+static ssize_t RTPRead ( input_thread_t *, byte_t *, size_t );
+static ssize_t RTPChoose( input_thread_t *, byte_t *, size_t );
+
+struct access_sys_t
+{
+ int fd;
+};
+
/*****************************************************************************
* Open: open the socket
*****************************************************************************/
static int Open( vlc_object_t *p_this )
{
- input_thread_t * p_input = (input_thread_t *)p_this;
- input_socket_t * p_access_data;
- module_t * p_network;
- char * psz_network = "";
+ input_thread_t *p_input = (input_thread_t *)p_this;
+ access_sys_t *p_sys;
+
char * psz_name = strdup(p_input->psz_name);
char * psz_parser = psz_name;
char * psz_server_addr = "";
char * psz_bind_addr = "";
char * psz_bind_port = "";
int i_bind_port = 0, i_server_port = 0;
- network_socket_t socket_desc;
+ vlc_value_t val;
- if( config_GetInt( p_input, "ipv4" ) )
- {
- psz_network = "ipv4";
- }
- if( config_GetInt( p_input, "ipv6" ) )
- {
- psz_network = "ipv6";
- }
+
+ /* First set ipv4/ipv6 */
+ var_Create( p_input, "ipv4", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
+ var_Create( p_input, "ipv6", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
if( *p_input->psz_access )
{
/* Find out which shortcut was used */
- if( !strncmp( p_input->psz_access, "udp6", 5 ) )
+ if( !strncmp( p_input->psz_access, "udp4", 6 ) ||
+ !strncmp( p_input->psz_access, "rtp4", 6 ))
{
- psz_network = "ipv6";
+ val.b_bool = VLC_TRUE;
+ var_Set( p_input, "ipv4", val );
+
+ val.b_bool = VLC_FALSE;
+ var_Set( p_input, "ipv6", val );
}
- else if( !strncmp( p_input->psz_access, "udp4", 5 ) )
+ else if( !strncmp( p_input->psz_access, "udp6", 6 ) ||
+ !strncmp( p_input->psz_access, "rtp6", 6 ) )
{
- psz_network = "ipv4";
+ val.b_bool = VLC_TRUE;
+ var_Set( p_input, "ipv6", val );
+
+ val.b_bool = VLC_FALSE;
+ var_Set( p_input, "ipv4", val );
}
}
/* Parse psz_name syntax :
* [serveraddr[:serverport]][@[bindaddr]:[bindport]] */
-
if( *psz_parser && *psz_parser != '@' )
{
/* Found server */
if( *psz_parser == ':' )
{
/* Found server port */
- *psz_parser = '\0'; /* Terminate server name */
- psz_parser++;
+ *psz_parser++ = '\0'; /* Terminate server name */
psz_server_port = psz_parser;
while( *psz_parser && *psz_parser != '@' )
if( *psz_parser == '@' )
{
/* Found bind address or bind port */
- *psz_parser = '\0'; /* Terminate server port or name if necessary */
- psz_parser++;
+ *psz_parser++ = '\0'; /* Terminate server port or name if necessary */
if( *psz_parser && *psz_parser != ':' )
{
if( *psz_parser == ':' )
{
/* Found bind port */
- *psz_parser = '\0'; /* Terminate bind address if necessary */
- psz_parser++;
-
+ *psz_parser++ = '\0'; /* Terminate bind address if necessary */
psz_bind_port = psz_parser;
}
}
- /* Convert ports format */
- if( *psz_server_port )
+ i_server_port = strtol( psz_server_port, NULL, 10 );
+ if( ( i_bind_port = strtol( psz_bind_port, NULL, 10 ) ) == 0 )
{
- i_server_port = strtol( psz_server_port, &psz_parser, 10 );
- if( *psz_parser )
- {
- msg_Err( p_input, "cannot parse server port near %s", psz_parser );
- free(psz_name);
- return( -1 );
- }
+ i_bind_port = config_GetInt( p_this, "server-port" );
+ }
+
+ msg_Dbg( p_input, "opening server=%s:%d local=%s:%d",
+ psz_server_addr, i_server_port, psz_bind_addr, i_bind_port );
+
+ p_sys = p_input->p_access_data = malloc( sizeof( access_sys_t ) );
+ if( p_sys == NULL )
+ {
+ msg_Err( p_input, "out of memory" );
+ return VLC_EGENERIC;
}
- if( *psz_bind_port )
+ p_sys->fd = net_OpenUDP( p_input, psz_bind_addr, i_bind_port,
+ psz_server_addr, i_server_port );
+ if( p_sys->fd < 0 )
{
- i_bind_port = strtol( psz_bind_port, &psz_parser, 10 );
- if( *psz_parser )
- {
- msg_Err( p_input, "cannot parse bind port near %s", psz_parser );
- free(psz_name);
- return( -1 );
- }
+ msg_Err( p_input, "cannot open socket" );
+ free( psz_name );
+ free( p_sys );
+ return VLC_EGENERIC;
}
+ free( psz_name );
+
+ /* FIXME */
+ var_Create( p_input, "mtu", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
+ var_Get( p_input, "mtu", &val);
+ p_input->i_mtu = val.i_int;
- p_input->pf_read = input_FDNetworkRead;
+ /* fill p_input fields */
+ p_input->pf_read = RTPChoose;
p_input->pf_set_program = input_SetProgram;
p_input->pf_set_area = NULL;
p_input->pf_seek = NULL;
vlc_mutex_lock( &p_input->stream.stream_lock );
- p_input->stream.b_pace_control = 0;
- p_input->stream.b_seekable = 0;
+ p_input->stream.b_pace_control = VLC_FALSE;
+ p_input->stream.b_seekable = VLC_FALSE;
p_input->stream.p_selected_area->i_tell = 0;
p_input->stream.i_method = INPUT_METHOD_NETWORK;
vlc_mutex_unlock( &p_input->stream.stream_lock );
- if( *psz_server_addr || i_server_port )
+ /* Update default_pts to a suitable value for udp access */
+ var_Create( p_input, "udp-caching", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
+ var_Get( p_input, "udp-caching", &val );
+ p_input->i_pts_delay = val.i_int * 1000;
+
+ return VLC_SUCCESS;
+}
+
+/*****************************************************************************
+ * Close: free unused data structures
+ *****************************************************************************/
+static void Close( vlc_object_t *p_this )
+{
+ input_thread_t *p_input = (input_thread_t *)p_this;
+ access_sys_t *p_sys = p_input->p_access_data;
+
+ msg_Info( p_input, "closing UDP target `%s'", p_input->psz_source );
+
+ net_Close( p_sys->fd );
+
+ free( p_sys );
+}
+
+/*****************************************************************************
+ * Read: read on a file descriptor, checking b_die periodically
+ *****************************************************************************/
+static ssize_t Read( input_thread_t * p_input, byte_t * p_buffer, size_t i_len )
+{
+ access_sys_t *p_sys = p_input->p_access_data;
+
+ return net_Read( p_input, p_sys->fd, p_buffer, i_len, VLC_FALSE );
+}
+
+/*****************************************************************************
+ * RTPRead : read from the network, and parse the RTP header
+ *****************************************************************************/
+static ssize_t RTPRead( input_thread_t * p_input, byte_t * p_buffer,
+ size_t i_len )
+{
+ int i_rtp_version;
+ int i_CSRC_count;
+ int i_payload_type;
+ int i_skip = 0;
+
+ byte_t * p_tmp_buffer = alloca( p_input->i_mtu );
+
+ /* Get the raw data from the socket.
+ * We first assume that RTP header size is the classic RTP_HEADER_LEN. */
+ ssize_t i_ret = Read( p_input, p_tmp_buffer, p_input->i_mtu );
+
+ if ( i_ret <= 0 ) return 0; /* i_ret is at least 1 */
+
+ /* Parse the header and make some verifications.
+ * See RFC 1889 & RFC 2250. */
+
+ i_rtp_version = ( p_tmp_buffer[0] & 0xC0 ) >> 6;
+ i_CSRC_count = ( p_tmp_buffer[0] & 0x0F );
+ i_payload_type = ( p_tmp_buffer[1] & 0x7F );
+
+ if ( i_rtp_version != 2 )
+ msg_Dbg( p_input, "RTP version is %u, should be 2", i_rtp_version );
+
+ if( i_payload_type == 14 )
{
- msg_Err( p_input, "this UDP syntax is deprecated; the server argument will be");
- msg_Err( p_input, "ignored (%s:%d). If you wanted to enter a multicast address",
- psz_server_addr, i_server_port);
- msg_Err( p_input, "or local port, type : %s:@%s:%d",
- *p_input->psz_access ? p_input->psz_access : "udp",
- psz_server_addr, i_server_port );
-
- i_server_port = 0;
- psz_server_addr = "";
+ i_skip = 4;
}
-
- msg_Dbg( p_input, "opening server=%s:%d local=%s:%d",
- psz_server_addr, i_server_port, psz_bind_addr, i_bind_port );
+ else if( i_payload_type != 33 && i_payload_type != 32 )
+ {
+ msg_Dbg( p_input, "unsupported RTP payload type (%u)",
+ i_payload_type );
+ }
+ i_skip += RTP_HEADER_LEN + 4*i_CSRC_count;
- /* Prepare the network_socket_t structure */
- socket_desc.i_type = NETWORK_UDP;
- socket_desc.psz_bind_addr = psz_bind_addr;
- socket_desc.i_bind_port = i_bind_port;
- socket_desc.psz_server_addr = psz_server_addr;
- socket_desc.i_server_port = i_server_port;
-
- /* Find an appropriate network module */
- p_input->p_private = (void*) &socket_desc;
- p_network = module_Need( p_input, "network", psz_network );
- free(psz_name);
- if( p_network == NULL )
+ /* A CSRC extension field is 32 bits in size (4 bytes) */
+ if ( i_ret < i_skip )
{
- return( -1 );
+ /* Packet is not big enough to hold the complete RTP_HEADER with
+ * CSRC extensions.
+ */
+ msg_Warn( p_input, "RTP input trashing %d bytes", i_ret - i_len );
+ return 0;
}
- module_Unneed( p_input, p_network );
-
- p_access_data = malloc( sizeof(input_socket_t) );
- p_input->p_access_data = (access_sys_t *)p_access_data;
- if( p_access_data == NULL )
+ /* Return the packet without the RTP header. */
+ i_ret -= i_skip;
+
+ if ( (size_t)i_ret > i_len )
{
- msg_Err( p_input, "out of memory" );
- return( -1 );
+ /* This should NOT happen. */
+ msg_Warn( p_input, "RTP input trashing %d bytes", i_ret - i_len );
+ i_ret = i_len;
+ }
+
+ p_input->p_vlc->pf_memcpy( p_buffer, &p_tmp_buffer[i_skip], i_ret );
+
+ return i_ret;
+}
+
+/*****************************************************************************
+ * RTPChoose : read from the network, and decide whether it's UDP or RTP
+ *****************************************************************************/
+static ssize_t RTPChoose( input_thread_t * p_input, byte_t * p_buffer,
+ size_t i_len )
+{
+ int i_rtp_version;
+ int i_CSRC_count;
+ int i_payload_type;
+
+ byte_t * p_tmp_buffer = alloca( p_input->i_mtu );
+
+ /* Get the raw data from the socket.
+ * We first assume that RTP header size is the classic RTP_HEADER_LEN. */
+ ssize_t i_ret = Read( p_input, p_tmp_buffer, p_input->i_mtu );
+
+ if ( i_ret <= 0 ) return 0; /* i_ret is at least 1 */
+
+ /* Check that it's not TS. */
+ if ( p_tmp_buffer[0] == 0x47 )
+ {
+ msg_Dbg( p_input, "detected TS over raw UDP" );
+ p_input->pf_read = Read;
+ p_input->p_vlc->pf_memcpy( p_buffer, p_tmp_buffer, i_ret );
+ return i_ret;
+ }
+
+ /* Parse the header and make some verifications.
+ * See RFC 1889 & RFC 2250. */
+
+ i_rtp_version = ( p_tmp_buffer[0] & 0xC0 ) >> 6;
+ i_CSRC_count = ( p_tmp_buffer[0] & 0x0F );
+ i_payload_type = ( p_tmp_buffer[1] & 0x7F );
+
+ if ( i_rtp_version != 2 )
+ {
+ msg_Dbg( p_input, "no supported RTP header detected" );
+ p_input->pf_read = Read;
+ p_input->p_vlc->pf_memcpy( p_buffer, p_tmp_buffer, i_ret );
+ return i_ret;
+ }
+
+ switch ( i_payload_type )
+ {
+ case 33:
+ msg_Dbg( p_input, "detected TS over RTP" );
+ break;
+
+ case 14:
+ msg_Dbg( p_input, "detected MPEG audio over RTP" );
+ if( !p_input->psz_demux || *p_input->psz_demux == '\0' )
+ {
+ p_input->psz_demux = "mp3";
+ }
+ break;
+
+ case 32:
+ msg_Dbg( p_input, "detected MPEG video over RTP" );
+ break;
+
+ default:
+ msg_Dbg( p_input, "no RTP header detected" );
+ p_input->pf_read = Read;
+ p_input->p_vlc->pf_memcpy( p_buffer, p_tmp_buffer, i_ret );
+ return i_ret;
+ }
+
+ p_input->pf_read = RTPRead;
+
+ /* A CSRC extension field is 32 bits in size (4 bytes) */
+ if( i_ret < RTP_HEADER_LEN + 4*i_CSRC_count )
+ {
+ /* Packet is not big enough to hold the complete RTP_HEADER with
+ * CSRC extensions.
+ */
+ msg_Warn( p_input, "RTP input trashing %d bytes", i_ret - i_len );
+ return 0;
+ }
+
+ /* Return the packet without the RTP header. */
+ i_ret -= RTP_HEADER_LEN + 4*i_CSRC_count;
+
+ if ( (size_t)i_ret > i_len )
+ {
+ /* This should NOT happen. */
+ msg_Warn( p_input, "RTP input trashing %d bytes", i_ret - i_len );
+ i_ret = i_len;
}
- p_access_data->i_handle = socket_desc.i_handle;
- p_input->i_mtu = socket_desc.i_mtu;
+ p_input->p_vlc->pf_memcpy( p_buffer,
+ &p_tmp_buffer[RTP_HEADER_LEN + 4*i_CSRC_count],
+ i_ret );
- return( 0 );
+ return i_ret;
}
projects / vlc / blobdiff