sgimb.c
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上传日期:2009-03-27
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- /*****************************************************************************
- * sgimb.c: a meta demux to parse sgimb referrer files
- *****************************************************************************
- * Copyright (C) 2004 VideoLAN
- * $Id: sgimb.c 9300 2004-11-13 01:35:28Z hartman $
- *
- * Authors: Derk-Jan Hartman <hartman at videolan dot org>
- *
- * 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
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
- *****************************************************************************/
- /*****************************************************************************
- * This is a metademux for the Kasenna MediaBase metafile format.
- * Kasenna MediaBase first returns this file when you are trying to access
- * their MPEG streams (MIME: application/x-sgimb). Very few applications
- * understand this format and the format is not really documented on the net.
- * Following a typical MediaBase file. Notice the sgi prefix of all the elements.
- * This stems from the fact that the MediaBase servers were first introduced by SGI?????.
- *
- * sgiNameServerHost=host.name.tld
- * Obvious: the host hosting this stream
- * Stream="xdma://host.name.tld/demo/a_very_cool.mpg"
- * Not always present. xdma can be read as RTSP.
- * sgiMovieName=/demo/a_very_cool.mpg
- * The path to the asset
- * sgiAuxState=1|2
- * AuxState=2 is always Video On Demand (so not Scheduled)
- * Not present with Live streams
- * sgiLiveFeed=True|False
- * Denounces if the stream is live or from assets (Canned?)
- * Live appears as a little sattelite dish in the web interface of Kasenna
- * sgiFormatName=PARTNER_41_MPEG-4
- * The type of stream. One of:
- * PARTNER_41_MPEG-4 (RTSP MPEG-4 fully compliant)
- * MPEG1-Audio (MP3 Audio streams in MPEG TS)
- * MPEG-1 (MPEG 1 A/V in MPEG TS)
- * MPEG-2 (MPEG 2 A/V in MPEG TS)
- * sgiWidth=720
- * The width of the to be received stream. Only present if stream is not Live.
- * sgiHeight=576
- * The height of the to be received stream. Only present if stream is not Live.
- * sgiBitrate=1630208
- * The bitrate of the to be received stream. Only present if stream is not Live.
- * sgiDuration=378345000
- * The duration of the to be received stream. Only present if stream is not Live.
- * sgiQTFileBegin
- * rtsptext
- * rtsp://host.name.tld/demo/a_very_cool.mpg
- * sgiQTFileEnd
- * Sometimes present. QT will recognize this as a RTSP reference file, if present.
- * sgiApplicationName=MediaBaseURL
- * Beats me !! :)
- * sgiElapsedTime=0
- * Time passed since the asset was started (resets for repeating non live assets?)
- * sgiMulticastAddress=233.81.233.15
- * The multicast IP used for the Multicast feed.
- * Also defines if a stream is multicast or not. (blue dot in kasenna web interface)
- * sgiMulticastPort=1234
- * The multicast port for the same Multicast feed.
- * sgiPacketSize=16384
- * The packetsize of the UDP frames that Kasenna sends. They should have used a default
- * that is a multiple of 188 (TS frame size). Most networks don't support more than 1500 anyways.
- * Also, when you loose a frame of this size, imagecorruption is more likely then with smaller
- * frames.
- * sgiServerVersion=6.1.2
- * Version of the server
- * sgiRtspPort=554
- * TCP port used for RTSP communication
- * AutoStart=True
- * Start playing automatically
- * DeliveryService=cds
- * Simulcasted (scheduled unicast) content. (Green dot in Kasenna web interface)
- * sgiShowingName=A nice name that everyone likes
- * A human readible descriptive title for this stream.
- * sgiSid=2311
- * Looks like this is the ID of the scheduled asset?
- * sgiUserAccount=pid=1724&time=1078527309&displayText=You%20are%20logged%20as%20guest&
- * User Authentication. Above is a default guest entry. Not required for RTSP communication.
- * sgiUserPassword=
- * Password :)
- *
- *****************************************************************************/
- /*****************************************************************************
- * Preamble
- *****************************************************************************/
- #include <stdlib.h> /* malloc(), free() */
- #include <vlc/vlc.h>
- #include <vlc/input.h>
- #include <vlc_playlist.h>
- /*****************************************************************************
- * Module descriptor
- *****************************************************************************/
- static int Activate ( vlc_object_t * );
- static void Deactivate( vlc_object_t * );
- vlc_module_begin();
- set_description( _("Kasenna MediaBase metademux") );
- set_capability( "demux2", 170 );
- set_callbacks( Activate, Deactivate );
- add_shortcut( "sgimb" );
- vlc_module_end();
- /*****************************************************************************
- * Local prototypes
- *****************************************************************************/
- #define MAX_LINE 1024
- struct demux_sys_t
- {
- char *psz_uri; /* Stream= or sgiQTFileBegin rtsp link */
- char *psz_server; /* sgiNameServerHost= */
- char *psz_location; /* sgiMovieName= */
- char *psz_name; /* sgiShowingName= */
- char *psz_user; /* sgiUserAccount= */
- char *psz_password; /* sgiUserPassword= */
- char *psz_mcast_ip; /* sgiMulticastAddress= */
- int i_mcast_port; /* sgiMulticastPort= */
- int i_packet_size; /* sgiPacketSize= */
- mtime_t i_duration; /* sgiDuration= */
- int i_port; /* sgiRtspPort= */
- int i_sid; /* sgiSid= */
- vlc_bool_t b_concert; /* DeliveryService=cds */
- vlc_bool_t b_rtsp_kasenna; /* kasenna style RTSP */
- };
- static int Demux ( demux_t *p_demux );
- static int Control( demux_t *p_demux, int i_query, va_list args );
- /*****************************************************************************
- * Activate: initializes m3u demux structures
- *****************************************************************************/
- static int Activate( vlc_object_t * p_this )
- {
- demux_t *p_demux = (demux_t *)p_this;
- demux_sys_t *p_sys;
- byte_t *p_peek;
- int i_size;
- /* Lets check the content to see if this is a sgi mediabase file */
- i_size = stream_Peek( p_demux->s, &p_peek, MAX_LINE );
- i_size -= sizeof("sgiNameServerHost=") - 1;
- if ( i_size > 0 )
- {
- while ( i_size && strncasecmp( p_peek, "sgiNameServerHost=",
- sizeof("sgiNameServerHost=") - 1 ) )
- {
- p_peek++;
- i_size--;
- }
- if ( !strncasecmp( p_peek, "sgiNameServerHost=",
- sizeof("sgiNameServerHost=") -1 ) )
- {
- p_demux->pf_demux = Demux;
- p_demux->pf_control = Control;
- p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );
- p_sys->psz_uri = NULL;
- p_sys->psz_server = NULL;
- p_sys->psz_location = NULL;
- p_sys->psz_name = NULL;
- p_sys->psz_user = NULL;
- p_sys->psz_password = NULL;
- p_sys->psz_mcast_ip = NULL;
- p_sys->i_mcast_port = 0;
- p_sys->i_packet_size = 0;
- p_sys->i_duration = 0;
- p_sys->i_port = 0;
- p_sys->i_sid = 0;
- p_sys->b_rtsp_kasenna = VLC_FALSE;
- p_sys->b_concert = VLC_FALSE;
- return VLC_SUCCESS;
- }
- }
- return VLC_EGENERIC;
- }
- /*****************************************************************************
- * Deactivate: frees unused data
- *****************************************************************************/
- static void Deactivate( vlc_object_t *p_this )
- {
- demux_t *p_demux = (demux_t*)p_this;
- demux_sys_t *p_sys = p_demux->p_sys;
- if( p_sys->psz_uri )
- free( p_sys->psz_uri );
- if( p_sys->psz_server )
- free( p_sys->psz_server );
- if( p_sys->psz_location )
- free( p_sys->psz_location );
- if( p_sys->psz_name )
- free( p_sys->psz_name );
- if( p_sys->psz_user )
- free( p_sys->psz_user );
- if( p_sys->psz_password )
- free( p_sys->psz_password );
- if( p_sys->psz_mcast_ip )
- free( p_sys->psz_mcast_ip );
- free( p_demux->p_sys );
- return;
- }
- static int ParseLine ( demux_t *p_demux, char *psz_line )
- {
- char *psz_bol;
- demux_sys_t *p_sys = p_demux->p_sys;
- psz_bol = psz_line;
- /* Remove unnecessary tabs or spaces at the beginning of line */
- while( *psz_bol == ' ' || *psz_bol == 't' ||
- *psz_bol == 'n' || *psz_bol == 'r' )
- {
- psz_bol++;
- }
- if( !strncasecmp( psz_bol, "rtsp://", sizeof("rtsp://") - 1 ) )
- {
- /* We found the link, it was inside a sgiQTFileBegin */
- p_sys->psz_uri = strdup( psz_bol );
- }
- else if( !strncasecmp( psz_bol, "Stream="", sizeof("Stream="") - 1 ) )
- {
- psz_bol += sizeof("Stream="") - 1;
- if ( !psz_bol )
- return 0;
- strrchr( psz_bol, '"' )[0] = ' ';
- /* We cheat around xdma. for some reason xdma links work different then rtsp */
- if( !strncasecmp( psz_bol, "xdma://", sizeof("xdma://") - 1 ) )
- {
- psz_bol[0] = 'r';
- psz_bol[1] = 't';
- psz_bol[2] = 's';
- psz_bol[3] = 'p';
- }
- p_sys->psz_uri = strdup( psz_bol );
- }
- else if( !strncasecmp( psz_bol, "sgiNameServerHost=", sizeof("sgiNameServerHost=") - 1 ) )
- {
- psz_bol += sizeof("sgiNameServerHost=") - 1;
- p_sys->psz_server = strdup( psz_bol );
- }
- else if( !strncasecmp( psz_bol, "sgiMovieName=", sizeof("sgiMovieName=") - 1 ) )
- {
- psz_bol += sizeof("sgiMovieName=") - 1;
- p_sys->psz_location = strdup( psz_bol );
- }
- else if( !strncasecmp( psz_bol, "sgiUserAccount=", sizeof("sgiUserAccount=") - 1 ) )
- {
- psz_bol += sizeof("sgiUserAccount=") - 1;
- p_sys->psz_user = strdup( psz_bol );
- }
- else if( !strncasecmp( psz_bol, "sgiUserPassword=", sizeof("sgiUserPassword=") - 1 ) )
- {
- psz_bol += sizeof("sgiUserPassword=") - 1;
- p_sys->psz_password = strdup( psz_bol );
- }
- else if( !strncasecmp( psz_bol, "sgiShowingName=", sizeof("sgiShowingName=") - 1 ) )
- {
- psz_bol += sizeof("sgiShowingName=") - 1;
- p_sys->psz_name = strdup( psz_bol );
- }
- else if( !strncasecmp( psz_bol, "sgiFormatName=", sizeof("sgiFormatName=") - 1 ) )
- {
- psz_bol += sizeof("sgiFormatName=") - 1;
- if( !strcasestr( psz_bol, "MPEG-4") ) /*not mpeg4 */
- p_sys->b_rtsp_kasenna = VLC_TRUE;
- }
- else if( !strncasecmp( psz_bol, "sgiMulticastAddress=", sizeof("sgiMulticastAddress=") - 1 ) )
- {
- psz_bol += sizeof("sgiMulticastAddress=") - 1;
- p_sys->psz_mcast_ip = strdup( psz_bol );
- }
- else if( !strncasecmp( psz_bol, "sgiMulticastPort=", sizeof("sgiMulticastPort=") - 1 ) )
- {
- psz_bol += sizeof("sgiMulticastPort=") - 1;
- p_sys->i_mcast_port = (int) strtol( psz_bol, NULL, 0 );
- }
- else if( !strncasecmp( psz_bol, "sgiPacketSize=", sizeof("sgiPacketSize=") - 1 ) )
- {
- psz_bol += sizeof("sgiPacketSize=") - 1;
- p_sys->i_packet_size = (int) strtol( psz_bol, NULL, 0 );
- }
- else if( !strncasecmp( psz_bol, "sgiDuration=", sizeof("sgiDuration=") - 1 ) )
- {
- psz_bol += sizeof("sgiDuration=") - 1;
- p_sys->i_duration = (mtime_t) strtol( psz_bol, NULL, 0 );
- }
- else if( !strncasecmp( psz_bol, "sgiRtspPort=", sizeof("sgiRtspPort=") - 1 ) )
- {
- psz_bol += sizeof("sgiRtspPort=") - 1;
- p_sys->i_port = (int) strtol( psz_bol, NULL, 0 );
- }
- else if( !strncasecmp( psz_bol, "sgiSid=", sizeof("sgiSid=") - 1 ) )
- {
- psz_bol += sizeof("sgiSid=") - 1;
- p_sys->i_sid = (int) strtol( psz_bol, NULL, 0 );
- }
- else if( !strncasecmp( psz_bol, "DeliveryService=cds", sizeof("DeliveryService=cds") - 1 ) )
- {
- p_sys->b_concert = VLC_TRUE;
- }
- else
- {
- /* This line isn't really important */
- return 0;
- }
- return VLC_SUCCESS;
- }
- /*****************************************************************************
- * Demux: reads and demuxes data packets
- *****************************************************************************
- * Returns -1 in case of error, 0 in case of EOF, 1 otherwise
- *****************************************************************************/
- static int Demux ( demux_t *p_demux )
- {
- demux_sys_t *p_sys = p_demux->p_sys;
- playlist_t *p_playlist;
- playlist_item_t *p_item;
-
- char *psz_line;
- int i_position;
- p_playlist = (playlist_t *) vlc_object_find( p_demux, VLC_OBJECT_PLAYLIST,
- FIND_ANYWHERE );
- if( !p_playlist )
- {
- msg_Err( p_demux, "can't find playlist" );
- return -1;
- }
- p_playlist->pp_items[p_playlist->i_index]->b_autodeletion = VLC_TRUE;
- i_position = p_playlist->i_index + 1;
- while( ( psz_line = stream_ReadLine( p_demux->s ) ) )
- {
- ParseLine( p_demux, psz_line );
- if( psz_line ) free( psz_line );
- }
- if( p_sys->psz_mcast_ip )
- {
- /* Definetly schedules multicast session */
- /* We don't care if it's live or not */
- char *temp;
- asprintf( &temp, "udp://@" "%s:%i", p_sys->psz_mcast_ip, p_sys->i_mcast_port );
- if( p_sys->psz_uri ) free( p_sys->psz_uri );
- p_sys->psz_uri = strdup( temp );
- free( temp );
- }
- if( p_sys->psz_uri == NULL )
- {
- if( p_sys->psz_server && p_sys->psz_location )
- {
- char *temp;
-
- asprintf( &temp, "rtsp://" "%s:%i%s",
- p_sys->psz_server, p_sys->i_port > 0 ? p_sys->i_port : 554, p_sys->psz_location );
-
- p_sys->psz_uri = strdup( temp );
- free( temp );
- }
- }
- if( p_sys->b_concert )
- {
- /* It's definetly a simulcasted scheduled stream */
- /* We don't care if it's live or not */
- char *temp;
- if( p_sys->psz_uri == NULL )
- {
- msg_Err( p_demux, "no URI was found" );
- return -1;
- }
-
- asprintf( &temp, "%s%%3FMeDiAbAsEshowingId=%d%%26MeDiAbAsEconcert%%3FMeDiAbAsE",
- p_sys->psz_uri, p_sys->i_sid );
- free( p_sys->psz_uri );
- p_sys->psz_uri = strdup( temp );
- free( temp );
- }
- p_item = playlist_ItemNew( p_playlist, p_sys->psz_uri,
- p_sys->psz_name ? p_sys->psz_name : p_sys->psz_uri );
- if( !p_item || !p_item->input.psz_uri )
- {
- msg_Err( p_demux, "A valid playlistitem could not be created" );
- return VLC_EGENERIC;
- }
- if( p_sys->i_packet_size && p_sys->psz_mcast_ip )
- {
- char *psz_option;
- p_sys->i_packet_size += 1000;
- asprintf( &psz_option, "mtu=%i", p_sys->i_packet_size );
- playlist_ItemAddOption( p_item, psz_option );
- free( psz_option );
- }
- if( !p_sys->psz_mcast_ip )
- {
- char *psz_option;
- asprintf( &psz_option, "rtsp-caching=5000" );
- playlist_ItemAddOption( p_item, psz_option );
- free( psz_option );
- }
- if( !p_sys->psz_mcast_ip && p_sys->b_rtsp_kasenna )
- {
- char *psz_option;
- asprintf( &psz_option, "rtsp-kasenna" );
- playlist_ItemAddOption( p_item, psz_option );
- free( psz_option );
- }
- playlist_ItemSetDuration( p_item, p_sys->i_duration );
- playlist_AddItem( p_playlist, p_item, PLAYLIST_INSERT, i_position );
- vlc_object_release( p_playlist );
- return VLC_SUCCESS;
- }
- static int Control( demux_t *p_demux, int i_query, va_list args )
- {
- return VLC_EGENERIC;
- }