src/stream_output/announce.c

   1 /*****************************************************************************
   2  * announce.c : announce handler
   3  *****************************************************************************
   4  * Copyright (C) 2002-2007 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Clément Stenac <zorglub@videolan.org>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  22  *****************************************************************************/
  23
  24 /*****************************************************************************
  25  * Preamble
  26  *****************************************************************************/
  27 #ifdef HAVE_CONFIG_H
  28 # include "config.h"
  29 #endif
  30
  31 #include <vlc_common.h>
  32 #include <vlc_sout.h>
  33 #include "stream_output.h"
  34 #include "libvlc.h"
  35
  36 #include <assert.h>
  37
  38 /****************************************************************************
  39  * Sout-side functions
  40  ****************************************************************************/
  41
  42 static void sap_destroy (vlc_object_t *p_this)
  43 {
  44     libvlc_priv (p_this->p_libvlc)->p_sap = NULL;
  45 }
  46
  47 #undef sout_AnnounceRegisterSDP
  48
  49 static vlc_mutex_t sap_mutex = VLC_STATIC_MUTEX;
  50
  51 /**
  52  *  Registers a new session with the announce handler, using a pregenerated SDP
  53  *
  54  * \param obj a VLC object
  55  * \param psz_sdp the SDP to register
  56  * \param psz_dst session address (needed for SAP address auto detection)
  57  * \return the new session descriptor structure
  58  */
  59 session_descriptor_t *
  60 sout_AnnounceRegisterSDP( vlc_object_t *obj, const char *psz_sdp,
  61                           const char *psz_dst )
  62 {
  63     session_descriptor_t *p_session = calloc( 1, sizeof (*p_session) );
  64     if( !p_session )
  65         return NULL;
  66
  67     p_session->psz_sdp = strdup( psz_sdp );
  68
  69     /* GRUIK. We should not convert back-and-forth from string to numbers */
  70     struct addrinfo *res;
  71     if (vlc_getaddrinfo (obj, psz_dst, 0, NULL, &res) == 0)
  72     {
  73         if (res->ai_addrlen <= sizeof (p_session->addr))
  74             memcpy (&p_session->addr, res->ai_addr,
  75                     p_session->addrlen = res->ai_addrlen);
  76         freeaddrinfo (res);
  77     }
  78
  79     vlc_mutex_lock (&sap_mutex);
  80     sap_handler_t *p_sap = libvlc_priv (obj->p_libvlc)->p_sap;
  81     if (p_sap == NULL)
  82     {
  83         p_sap = SAP_Create (VLC_OBJECT (obj->p_libvlc));
  84         libvlc_priv (obj->p_libvlc)->p_sap = p_sap;
  85         vlc_object_set_destructor ((vlc_object_t *)p_sap, sap_destroy);
  86     }
  87     else
  88         vlc_object_hold ((vlc_object_t *)p_sap);
  89     vlc_mutex_unlock (&sap_mutex);
  90
  91     if (p_sap == NULL)
  92         goto error;
  93
  94     msg_Dbg (obj, "adding SAP session");
  95     SAP_Add (p_sap, p_session );
  96     return p_session;
  97
  98 error:
  99     free (p_session->psz_sdp);
 100     free (p_session);
 101     return NULL;
 102 }
 103
 104 #undef sout_AnnounceUnRegister
 105 /**
 106  *  Unregisters an existing session
 107  *
 108  * \param obj a VLC object
 109  * \param p_session the session descriptor
 110  * \return VLC_SUCCESS or an error
 111  */
 112 int sout_AnnounceUnRegister( vlc_object_t *obj,
 113                              session_descriptor_t *p_session )
 114 {
 115     sap_handler_t *p_sap = libvlc_priv (obj->p_libvlc)->p_sap;
 116
 117     msg_Dbg (obj, "removing SAP session");
 118     SAP_Del (p_sap, p_session);
 119
 120     vlc_mutex_lock (&sap_mutex);
 121     vlc_object_release ((vlc_object_t *)p_sap);
 122     vlc_mutex_unlock (&sap_mutex);
 123
 124     free (p_session->psz_sdp);
 125     free (p_session);
 126
 127     return 0;
 128 }