decoder: do not emit output events if there is no input

src/input/decoder.c

@@ -2088,6 +2088,7 @@ static void DeleteDecoder( decoder_t * p_dec )
     if( p_owner->p_aout )
     {
         input_resource_RequestAout( p_owner->p_resource, p_owner->p_aout );
+        if( p_owner->p_input != NULL )
             input_SendEventAout( p_owner->p_input );
         p_owner->p_aout = NULL;
     }
@@ -2100,6 +2101,7 @@ static void DeleteDecoder( decoder_t * p_dec )
         /* */
         input_resource_RequestVout( p_owner->p_resource, p_owner->p_vout, NULL,
                                     0, true );
+        if( p_owner->p_input != NULL )
             input_SendEventVout( p_owner->p_input );
     }
 
@@ -2182,6 +2184,7 @@ static vout_thread_t *aout_request_vout( void *p_private,
 
     p_vout = input_resource_RequestVout( p_owner->p_resource, p_vout, p_fmt, 1,
                                          b_recyle );
+    if( p_input != NULL )
         input_SendEventVout( p_input );
 
     return p_vout;
@@ -2257,6 +2260,7 @@ static aout_buffer_t *aout_new_buffer( decoder_t *p_dec, int i_samples )
 
         vlc_mutex_unlock( &p_owner->lock );
 
+        if( p_owner->p_input != NULL )
             input_SendEventAout( p_owner->p_input );
 
         if( p_owner->p_aout_input == NULL )
@@ -2382,6 +2386,7 @@ static picture_t *vout_new_buffer( decoder_t *p_dec )
 
         vlc_mutex_unlock( &p_owner->lock );
 
+        if( p_owner->p_input != NULL )
             input_SendEventVout( p_owner->p_input );
         if( p_vout == NULL )
         {