Add option to force timeshift filter even if access can control pace or pause.

The goal is to be able to timeshift on live rtsp streams. The true fix would be to fix the rtsp access ...

modules/access_filter/timeshift.c

@@ -48,6 +48,9 @@ static void Close( vlc_object_t * );
 #define DIR_TEXT N_("Timeshift directory")
 #define DIR_LONGTEXT N_( "Directory used to store the timeshift temporary " \
   "files." )
+#define FORCE_TEXT N_("Force use of the timeshift module")
+#define FORCE_LONGTEXT N_("Force use of the timeshift module even if the " \
+  "access declares that it can control pace or pause." )
 
 vlc_module_begin();
     set_shortname( _("Timeshift") );
@@ -61,6 +64,8 @@ vlc_module_begin();
     add_integer( "timeshift-granularity", 50, NULL, GRANULARITY_TEXT,
                  GRANULARITY_LONGTEXT, VLC_TRUE );
     add_directory( "timeshift-dir", 0, 0, DIR_TEXT, DIR_LONGTEXT, VLC_FALSE );
+    add_bool( "timeshift-force", VLC_FALSE, NULL, FORCE_TEXT, FORCE_LONGTEXT,
+              VLC_FALSE );
 vlc_module_end();
 
 /*****************************************************************************
@@ -113,17 +118,27 @@ static int Open( vlc_object_t *p_this )
     access_sys_t *p_sys;
     vlc_bool_t b_bool;
 
-    /* Only work with not pace controled access */
-    if( access2_Control( p_src, ACCESS_CAN_CONTROL_PACE, &b_bool ) || b_bool )
+    var_Create( p_access, "timeshift-force",
+                VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
+    if( var_GetBool( p_access, "timeshift-force" ) == VLC_TRUE )
     {
-        msg_Dbg( p_src, "ACCESS_CAN_CONTROL_PACE" );
-        return VLC_EGENERIC;
+        msg_Dbg( p_access, "Forcing use of timeshift even if access can control pace or pause" );
     }
-    /* Refuse access that can be paused */
-    if( access2_Control( p_src, ACCESS_CAN_PAUSE, &b_bool ) || b_bool )
+    else
     {
-        msg_Dbg( p_src, "ACCESS_CAN_PAUSE: timeshift useless" );
-        return VLC_EGENERIC;
+        /* Only work with not pace controled access */
+        if( access2_Control( p_src, ACCESS_CAN_CONTROL_PACE, &b_bool )
+            || b_bool )
+        {
+            msg_Dbg( p_src, "ACCESS_CAN_CONTROL_PACE: timeshift useless" );
+            return VLC_EGENERIC;
+        }
+        /* Refuse access that can be paused */
+        if( access2_Control( p_src, ACCESS_CAN_PAUSE, &b_bool ) || b_bool )
+        {
+            msg_Dbg( p_src, "ACCESS_CAN_PAUSE: timeshift useless" );
+            return VLC_EGENERIC;
+        }
     }
 
     /* */