add msg_SubscriptionSetVerbosity call, so core filter message-level for subscribers

include/vlc_messages.h

@@ -114,6 +114,7 @@ typedef void (*msg_callback_t) (msg_cb_data_t *, msg_item_t *, unsigned);
 
 VLC_EXPORT( msg_subscription_t*, msg_Subscribe, ( libvlc_int_t *, msg_callback_t, msg_cb_data_t * ) );
 VLC_EXPORT( void, msg_Unsubscribe, ( msg_subscription_t * ) );
+VLC_EXPORT( void, msg_SubscriptionSetVerbosity, ( msg_subscription_t *, const int) );
 
 /* Enable or disable a certain object debug messages */
 VLC_EXPORT( void, msg_EnableObjectPrinting, ( vlc_object_t *, const char * psz_object ) );

src/libvlccore.sym

@@ -276,6 +276,7 @@ msg_Generic
 msg_GenericVa
 msg_Subscribe
 msg_Unsubscribe
+msg_SubscriptionSetVerbosity
 msleep
 mstrtime
 mwait

src/misc/messages.c

@@ -142,6 +142,7 @@ msg_bank_t *msg_Create (void)
 static void const * kObjectPrintingEnabled = &kObjectPrintingEnabled;
 static void const * kObjectPrintingDisabled = &kObjectPrintingDisabled;
 
+
 #undef msg_EnableObjectPrinting
 void msg_EnableObjectPrinting (vlc_object_t *obj, const char * psz_object)
 {
@@ -202,6 +203,7 @@ struct msg_subscription_t
     libvlc_int_t   *instance;
     msg_callback_t  func;
     msg_cb_data_t  *opaque;
+    int             verbosity;
 };
 
 /**
@@ -224,6 +226,7 @@ msg_subscription_t *msg_Subscribe (libvlc_int_t *instance, msg_callback_t cb,
     sub->instance = instance;
     sub->func = cb;
     sub->opaque = opaque;
+    sub->verbosity = 2; /* by default, give all the messages */
 
     msg_bank_t *bank = libvlc_bank (instance);
     vlc_rwlock_wrlock (&bank->lock);
@@ -247,6 +250,18 @@ void msg_Unsubscribe (msg_subscription_t *sub)
     free (sub);
 }
 
+void msg_SubscriptionSetVerbosity( msg_subscription_t *sub, const int i_verbosity )
+{
+    if( i_verbosity < 0 || i_verbosity > 2 ) return;
+
+    msg_bank_t *bank = libvlc_bank ( sub->instance );
+
+    vlc_rwlock_wrlock (&bank->lock);
+
+    sub->verbosity = i_verbosity;
+
+    vlc_rwlock_unlock (&bank->lock);
+}
 /*****************************************************************************
  * msg_*: print a message
  *****************************************************************************
@@ -455,6 +470,19 @@ void msg_GenericVa (vlc_object_t *p_this, int i_type,
             if( val == kObjectPrintingEnabled  ); /* Allowed */
             else if( !bank->all_objects_enabled ) continue;
         }
+        switch( p_item->i_type )
+        {
+            case VLC_MSG_INFO:
+            case VLC_MSG_ERR:
+                if( sub->verbosity < 0 ) continue;
+                break;
+            case VLC_MSG_WARN:
+                if( sub->verbosity < 1 ) continue;
+                break;
+            case VLC_MSG_DBG:
+                if( sub->verbosity < 2 ) continue;
+                break;
+        }
 
         sub->func (sub->opaque, p_item, 0);
     }