--- /dev/null
+/*****************************************************************************
+ * sdp.c: SDP parser and builtin UDP/RTP/RTSP
+ *****************************************************************************
+ * Copyright (C) 2001 VideoLAN
+ * $Id: sdp.c,v 1.1 2003/08/03 15:25:33 fenrir Exp $
+ *
+ * Authors: Laurent Aimar <fenrir@via.ecp.fr>
+ *
+ * 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.
+ *****************************************************************************/
+
+/*****************************************************************************
+ * Preamble
+ *****************************************************************************/
+#include <stdlib.h> /* malloc(), free() */
+
+#include <vlc/vlc.h>
+#include <vlc/input.h>
+
+#include <ninput.h>
+
+/*****************************************************************************
+ * Module descriptor
+ *****************************************************************************/
+static int Open ( vlc_object_t * );
+static void Close( vlc_object_t * );
+
+vlc_module_begin();
+ set_description( _("SDP demuxer + UDP/RTP/RTSP") );
+ set_capability( "demux", 100 );
+ set_callbacks( Open, Close );
+ add_shortcut( "sdp" );
+vlc_module_end();
+
+
+/*****************************************************************************
+ * Local prototypes
+ *****************************************************************************/
+static int Demux ( input_thread_t * );
+
+typedef struct
+{
+ char *psz_media;
+ char *psz_description;
+ char *psz_connection;
+ char *psz_bandwith;
+ char *psz_key;
+
+} sdp_media_t;
+
+typedef struct
+{
+ char *psz_origin;
+ char *psz_session;
+ char *psz_description;
+ char *psz_uri;
+ char *psz_email;
+ char *psz_phone;
+ char *psz_connection;
+ char *psz_bandwith;
+ char *psz_key;
+ char *psz_timezone;
+
+ int i_media;
+ sdp_media_t *media;
+
+} sdp_session_t;
+
+typedef struct
+{
+ int i_session;
+ sdp_session_t *session;
+
+} sdp_t;
+
+struct demux_sys_t
+{
+ stream_t *s;
+
+ sdp_t *p_sdp;
+};
+
+static sdp_t *sdp_Parse ( char * );
+static void sdp_Dump ( input_thread_t *, sdp_t * );
+static void sdp_Release( sdp_t * );
+
+/*****************************************************************************
+ * Open:
+ *****************************************************************************/
+static int Open( vlc_object_t * p_this )
+{
+ input_thread_t *p_input = (input_thread_t *)p_this;
+ demux_sys_t *p_sys;
+ uint8_t *p_peek;
+
+ int i_sdp;
+ int i_sdp_max;
+ char *psz_sdp;
+
+ /* See if it looks like a SDP
+ v, o, s fields are mandatory and in this order */
+ if( input_Peek( p_input, &p_peek, 7 ) < 7 )
+ {
+ msg_Err( p_input, "cannot peek" );
+ return VLC_EGENERIC;
+ }
+ if( strncmp( p_peek, "v=0\r\no=", 7 ) &&
+ strncmp( p_peek, "v=0\no=", 6 ) )
+ {
+ msg_Err( p_input, "SDP module discarded" );
+ return VLC_EGENERIC;
+ }
+
+ /* Set input_thread_t fields */
+ p_input->pf_demux = Demux;
+ p_input->p_demux_data = p_sys = malloc( sizeof( demux_sys_t ) );
+
+ if( ( p_sys->s = stream_OpenInput( p_input ) ) == NULL )
+ {
+ msg_Err( p_input, "cannot create stream" );
+ goto error;
+ }
+
+ /* Read the complete SDP file */
+ i_sdp = 0;
+ i_sdp_max = 1024;
+ psz_sdp = malloc( i_sdp_max );
+ for( ;; )
+ {
+ int i_read;
+
+ i_read = stream_Read( p_sys->s, &psz_sdp[i_sdp], i_sdp_max - i_sdp -1 );
+ if( i_read <= i_sdp_max - i_sdp -1 )
+ {
+ if( i_read > 0 )
+ {
+ i_sdp += i_read;
+ }
+ break;
+ }
+ i_sdp += i_read;
+ i_sdp_max += 1024;
+ psz_sdp = realloc( psz_sdp, i_sdp_max );
+ }
+ psz_sdp[i_sdp] = '\0';
+
+ if( strlen( psz_sdp ) <= 0 )
+ {
+ msg_Err( p_input, "cannot read SDP file" );
+ goto error;
+
+ }
+
+ if( ( p_sys->p_sdp = sdp_Parse( psz_sdp ) ) == NULL )
+ {
+ msg_Err( p_input, "cannot parse SDP" );
+ goto error;
+ }
+ sdp_Dump( p_input, p_sys->p_sdp );
+
+ return VLC_SUCCESS;
+
+error:
+ if( p_sys->s )
+ {
+ stream_Release( p_sys->s );
+ }
+ free( p_sys );
+ return VLC_EGENERIC;
+}
+
+/*****************************************************************************
+ * Close: frees unused data
+ *****************************************************************************/
+static void Close( vlc_object_t *p_this )
+{
+ input_thread_t *p_input = (input_thread_t *)p_this;
+ demux_sys_t *p_sys = p_input->p_demux_data;
+
+ sdp_Release( p_sys->p_sdp );
+ free( p_sys );
+}
+
+/*****************************************************************************
+ * Demux: reads and demuxes data packets
+ *****************************************************************************
+ * Returns -1 in case of error, 0 in case of EOF, 1 otherwise
+ *****************************************************************************/
+static int Demux ( input_thread_t *p_input )
+{
+
+ return 0;
+}
+
+/*****************************************************************************
+ *
+ *****************************************************************************/
+
+/*****************************************************************************
+ * SDP Parser
+ *****************************************************************************/
+static int sdp_GetLine( char **ppsz_sdp, char *p_com, char **pp_arg )
+{
+ char *p = *ppsz_sdp;
+ char *p_end;
+ int i_size;
+
+ if( p[0] < 'a' || p[0] > 'z' || p[1] != '=' )
+ {
+ return VLC_EGENERIC;
+ }
+
+ *p_com = p[0];
+
+ if( ( p_end = strstr( p, "\n" ) ) == NULL )
+ {
+ p_end = p + strlen( p );
+ }
+ else
+ {
+ while( *p_end == '\n' || *p_end == '\r' )
+ {
+ p_end--;
+ }
+ p_end++;
+ }
+
+ i_size = p_end - &p[2];
+ *pp_arg = malloc( i_size + 1 );
+ memcpy( *pp_arg, &p[2], i_size );
+ (*pp_arg)[i_size] = '\0';
+
+ while( *p_end == '\r' || *p_end == '\n' )
+ {
+ p_end++;
+ }
+ *ppsz_sdp = p_end;
+ return VLC_SUCCESS;
+}
+
+static sdp_t *sdp_Parse ( char *psz_sdp )
+{
+ sdp_t *sdp = malloc( sizeof( sdp_t ) );
+
+ sdp->i_session = -1;
+ sdp->session = NULL;
+
+ for( ;; )
+ {
+#define p_session (&sdp->session[sdp->i_session])
+#define p_media (&p_session->media[p_session->i_media])
+ char com, *psz;
+
+ if( sdp_GetLine( &psz_sdp, &com, &psz ) )
+ {
+ break;
+ }
+ fprintf( stderr, "com=%c arg=%s\n", com, psz );
+ if( sdp->i_session < 0 && ( com !='v' || strcmp( psz, "0" ) ) )
+ {
+ break;
+ }
+ switch( com )
+ {
+ case 'v':
+ fprintf( stderr, "New session added\n" );
+ if( sdp->i_session != -1 )
+ {
+ p_session->i_media++;
+ }
+ /* Add a new session */
+ sdp->i_session++;
+ sdp->session =
+ realloc( sdp->session,
+ (sdp->i_session + 1)*sizeof(sdp_session_t) );
+ p_session->psz_origin = NULL;
+ p_session->psz_session = NULL;
+ p_session->psz_description= NULL;
+ p_session->psz_uri = NULL;
+ p_session->psz_email = NULL;
+ p_session->psz_phone = NULL;
+ p_session->psz_connection = NULL;
+ p_session->psz_bandwith = NULL;
+ p_session->psz_key = NULL;
+ p_session->psz_timezone = NULL;
+ p_session->i_media = -1;
+ p_session->media = NULL;
+ break;
+ case 'm':
+ fprintf( stderr, "New media added\n" );
+ p_session->i_media++;
+ p_session->media =
+ realloc( p_session->media,
+ (p_session->i_media + 1)*sizeof( sdp_media_t ) );
+ p_media->psz_media = strdup( psz );
+ p_media->psz_description= NULL;
+ p_media->psz_connection = NULL;
+ p_media->psz_bandwith = NULL;
+ p_media->psz_key = NULL;
+ break;
+ case 'o':
+ p_session->psz_origin = strdup( psz );
+ break;
+ case 's':
+ p_session->psz_session = strdup( psz );
+ break;
+ case 'i':
+ if( p_session->i_media != -1 )
+ {
+ p_media->psz_description = strdup( psz );
+ }
+ else
+ {
+ p_session->psz_description = strdup( psz );
+ }
+ break;
+ case 'u':
+ p_session->psz_uri = strdup( psz );
+ break;
+ case 'e':
+ p_session->psz_email = strdup( psz );
+ break;
+ case 'p':
+ p_session->psz_phone = strdup( psz );
+ break;
+ case 'c':
+ if( p_session->i_media != -1 )
+ {
+ p_media->psz_connection = strdup( psz );
+ }
+ else
+ {
+ p_session->psz_connection = strdup( psz );
+ }
+ break;
+ case 'b':
+ if( p_session->i_media != -1 )
+ {
+ p_media->psz_bandwith = strdup( psz );
+ }
+ else
+ {
+ p_session->psz_bandwith = strdup( psz );
+ }
+ break;
+ case 'k':
+ if( p_session->i_media != -1 )
+ {
+ p_media->psz_key = strdup( psz );
+ }
+ else
+ {
+ p_session->psz_key = strdup( psz );
+ }
+ break;
+ case 'z':
+ p_session->psz_timezone = strdup( psz );
+ break;
+
+ default:
+ fprintf( stderr, "unhandled com=%c\n", com );
+ break;
+ }
+
+#undef p_session
+ }
+
+ if( sdp->i_session < 0 )
+ {
+ free( sdp );
+ return NULL;
+ }
+ sdp->session[sdp->i_session].i_media++;
+ sdp->i_session++;
+
+ return sdp;
+}
+static void sdp_Release( sdp_t *p_sdp )
+{
+#define FREE( p ) if( p ) { free( p ) ; (p) = NULL; }
+ int i, j;
+ for( i = 0; i < p_sdp->i_session; i++ )
+ {
+ FREE( p_sdp->session[i].psz_origin );
+ FREE( p_sdp->session[i].psz_session );
+ FREE( p_sdp->session[i].psz_description );
+ FREE( p_sdp->session[i].psz_uri );
+ FREE( p_sdp->session[i].psz_email );
+ FREE( p_sdp->session[i].psz_phone );
+ FREE( p_sdp->session[i].psz_connection );
+ FREE( p_sdp->session[i].psz_bandwith );
+ FREE( p_sdp->session[i].psz_key );
+ FREE( p_sdp->session[i].psz_timezone );
+
+ for( j = 0; j < p_sdp->session[i].i_media; j++ )
+ {
+ FREE( p_sdp->session[i].media[j].psz_media );
+ FREE( p_sdp->session[i].media[j].psz_description );
+ FREE( p_sdp->session[i].media[j].psz_connection );
+ FREE( p_sdp->session[i].media[j].psz_bandwith );
+ FREE( p_sdp->session[i].media[j].psz_key );
+ }
+ FREE( p_sdp->session[i].media);
+ }
+ FREE( p_sdp->session );
+ free( p_sdp );
+#undef FREE
+}
+
+static void sdp_Dump ( input_thread_t *p_input, sdp_t *p_sdp )
+{
+ int i, j;
+#define PRINTS( var, fmt ) \
+ if( var ) { msg_Dbg( p_input, " - " fmt " : %s", var ); }
+#define PRINTM( var, fmt ) \
+ if( var ) { msg_Dbg( p_input, " - " fmt " : %s", var ); }
+
+ for( i = 0; i < p_sdp->i_session; i++ )
+ {
+ msg_Dbg( p_input, "session[%d]", i );
+ PRINTS( p_sdp->session[i].psz_origin, "Origin" );
+ PRINTS( p_sdp->session[i].psz_session, "Session" );
+ PRINTS( p_sdp->session[i].psz_description, "Description" );
+ PRINTS( p_sdp->session[i].psz_uri, "URI" );
+ PRINTS( p_sdp->session[i].psz_email, "e-mail" );
+ PRINTS( p_sdp->session[i].psz_phone, "Phone" );
+ PRINTS( p_sdp->session[i].psz_connection, "Connection" );
+ PRINTS( p_sdp->session[i].psz_bandwith, "Bandwith" );
+ PRINTS( p_sdp->session[i].psz_key, "Key" );
+ PRINTS( p_sdp->session[i].psz_timezone, "TimeZone" );
+ for( j = 0; j < p_sdp->session[i].i_media; j++ )
+ {
+ msg_Dbg( p_input, " - media[%d]", j );
+ PRINTM( p_sdp->session[i].media[j].psz_media, "Name" );
+ PRINTM( p_sdp->session[i].media[j].psz_description, "Description" );
+ PRINTM( p_sdp->session[i].media[j].psz_connection, "Connection" );
+ PRINTM( p_sdp->session[i].media[j].psz_bandwith, "Bandwith" );
+ PRINTM( p_sdp->session[i].media[j].psz_key, "Key" );
+ }
+ }
+#undef PRINTS
+}
projects / vlc / commitdiff