input: replace vlc_object_alive() with a dedicated getter

This is interlocked with the control queue as it most probably should.

src/input/es_out.c

@@ -2036,8 +2036,10 @@ static void EsOutDel( es_out_t *out, es_out_id_t *es )
 
     /* We don't try to reselect */
     if( es->p_dec )
-    {
-        while( vlc_object_alive(p_sys->p_input) && !p_sys->b_buffering )
+    {   /* FIXME: This might hold the ES output caller (i.e. the demux), and
+         * the corresponding thread (typically the input thread), for a little
+         * bit too long if the ES is deleted in the middle of a stream. */
+        while( !input_Stopped(p_sys->p_input) && !p_sys->b_buffering )
         {
             if( input_DecoderIsEmpty( es->p_dec ) &&
                 ( !es->p_dec_record || input_DecoderIsEmpty( es->p_dec_record ) ))

src/input/input.c

@@ -548,6 +548,17 @@ static void *Run( void *obj )
     return NULL;
 }
 
+bool input_Stopped( input_thread_t *input )
+{
+    input_thread_private_t *sys = input->p;
+    bool ret;
+
+    vlc_mutex_lock( &sys->lock_control );
+    ret = sys->is_stopped;
+    vlc_mutex_unlock( &sys->lock_control );
+    return ret;
+}
+
 /*****************************************************************************
  * Main loop: Fill buffers from access, and demux
  *****************************************************************************/
@@ -698,7 +709,7 @@ static void MainLoop( input_thread_t *p_input, bool b_interactive )
     bool b_pause_after_eof = b_interactive &&
                              var_InheritBool( p_input, "play-and-pause" );
 
-    while( vlc_object_alive( p_input ) && p_input->p->i_state != ERROR_S )
+    while( !input_Stopped( p_input ) && p_input->p->i_state != ERROR_S )
     {
         mtime_t i_wakeup = -1;
         bool b_paused = p_input->p->i_state == PAUSE_S;
@@ -2246,15 +2257,12 @@ static int InputSourceInit( input_thread_t *p_input,
         access_t *p_access = access_New( p_input, p_input,
                                          psz_access, psz_demux, psz_path );
         if( p_access == NULL )
-        {
-            if( vlc_object_alive( p_input ) )
         {
             msg_Err( p_input, "open of `%s' failed", psz_mrl );
-                if( !b_in_can_fail )
+            if( !b_in_can_fail && !input_Stopped( p_input ) )
                 dialog_Fatal( p_input, _("Your input can't be opened"),
                               _("VLC is unable to open the MRL '%s'."
                                 " Check the log for details."), psz_mrl );
-            }
             goto error;
         }
 
@@ -2357,17 +2365,15 @@ static int InputSourceInit( input_thread_t *p_input,
                                  p_input->b_preparsing );
 
         if( in->p_demux == NULL )
-        {
-            if( vlc_object_alive( p_input ) )
         {
             msg_Err( p_input, "no suitable demux module for `%s/%s://%s'",
                      psz_access, psz_demux, psz_path );
-                if( !b_in_can_fail )
+            if( !b_in_can_fail && !input_Stopped( p_input ) )
                 dialog_Fatal( VLC_OBJECT( p_input ),
                               _("VLC can't recognize the input's format"),
                               _("The format of '%s' cannot be detected. "
-                                    "Have a look at the log for details."), psz_mrl );
-            }
+                                "Have a look at the log for details."),
+                              psz_mrl );
             stream_Delete( p_stream );
             goto error;
         }

src/input/input_internal.h

@@ -219,6 +219,8 @@ enum input_control_e
  */
 void input_ControlPush( input_thread_t *, int i_type, vlc_value_t * );
 
+bool input_Stopped( input_thread_t * );
+
 /* Bound pts_delay */
 #define INPUT_PTS_DELAY_MAX INT64_C(60000000)