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 struct announce_method_t
  39 {
  40 } sap_method;
  41
  42 /****************************************************************************
  43  * Sout-side functions
  44  ****************************************************************************/
  45
  46 static void sap_destroy (vlc_object_t *p_this)
  47 {
  48     libvlc_priv (p_this->p_libvlc)->p_sap = NULL;
  49 }
  50
  51 #undef sout_AnnounceRegisterSDP
  52 /**
  53  *  Registers a new session with the announce handler, using a pregenerated SDP
  54  *
  55  * \param obj a VLC object
  56  * \param psz_sdp the SDP to register
  57  * \param psz_dst session address (needed for SAP address auto detection)
  58  * \param p_method an announce method descriptor
  59  * \return the new session descriptor structure
  60  */
  61 session_descriptor_t *
  62 sout_AnnounceRegisterSDP( vlc_object_t *obj, const char *psz_sdp,
  63                           const char *psz_dst, announce_method_t *p_method )
  64 {
  65     assert (p_method == &sap_method);
  66     (void) p_method;
  67
  68     session_descriptor_t *p_session = calloc( 1, sizeof (*p_session) );
  69     if( !p_session )
  70         return NULL;
  71
  72     p_session->psz_sdp = strdup( psz_sdp );
  73
  74     /* GRUIK. We should not convert back-and-forth from string to numbers */
  75     struct addrinfo *res;
  76     if (vlc_getaddrinfo (obj, psz_dst, 0, NULL, &res) == 0)
  77     {
  78         if (res->ai_addrlen <= sizeof (p_session->addr))
  79             memcpy (&p_session->addr, res->ai_addr,
  80                     p_session->addrlen = res->ai_addrlen);
  81         vlc_freeaddrinfo (res);
  82     }
  83
  84     vlc_value_t lockval;
  85     if (var_Create (obj->p_libvlc, "sap_mutex", VLC_VAR_MUTEX)
  86      || var_Get (obj->p_libvlc, "sap_mutex", &lockval))
  87        goto error;
  88
  89     vlc_mutex_lock (lockval.p_address);
  90     sap_handler_t *p_sap = libvlc_priv (obj->p_libvlc)->p_sap;
  91     if (p_sap == NULL)
  92     {
  93         p_sap = SAP_Create (VLC_OBJECT (obj->p_libvlc));
  94         libvlc_priv (obj->p_libvlc)->p_sap = p_sap;
  95         vlc_object_set_destructor ((vlc_object_t *)p_sap, sap_destroy);
  96     }
  97     else
  98         vlc_object_hold ((vlc_object_t *)p_sap);
  99     vlc_mutex_unlock (lockval.p_address);
 100
 101     if (p_sap == NULL)
 102         goto error;
 103
 104     msg_Dbg (obj, "adding SAP session");
 105     SAP_Add (p_sap, p_session );
 106     return p_session;
 107
 108 error:
 109     free (p_session->psz_sdp);
 110     free (p_session);
 111     return NULL;
 112 }
 113
 114 #undef sout_AnnounceUnRegister
 115 /**
 116  *  Unregisters an existing session
 117  *
 118  * \param obj a VLC object
 119  * \param p_session the session descriptor
 120  * \return VLC_SUCCESS or an error
 121  */
 122 int sout_AnnounceUnRegister( vlc_object_t *obj,
 123                              session_descriptor_t *p_session )
 124 {
 125     sap_handler_t *p_sap = libvlc_priv (obj->p_libvlc)->p_sap;
 126
 127     msg_Dbg (obj, "removing SAP session");
 128     SAP_Del (p_sap, p_session);
 129
 130     vlc_value_t lockval;
 131     var_Create (obj->p_libvlc, "sap_mutex", VLC_VAR_MUTEX);
 132     var_Get (obj->p_libvlc, "sap_mutex", &lockval);
 133     vlc_mutex_lock (lockval.p_address);
 134     vlc_object_release ((vlc_object_t *)p_sap);
 135     vlc_mutex_unlock (lockval.p_address);
 136
 137     free (p_session->psz_sdp);
 138     free (p_session);
 139
 140     return 0;
 141 }
 142
 143 /**
 144  * \return the SAP announce method
 145  */
 146 announce_method_t * sout_SAPMethod (void)
 147 {
 148     return &sap_method;
 149 }
 150
 151 void sout_MethodRelease (announce_method_t *m)
 152 {
 153     assert (m == &sap_method);
 154 }