decoder: release the aout instance when we stop the aout input

Effectively, the aout instance reference within the decoder now has the
same lifetime has the aout input. As the aout instance is kept in the
input resource, this does not really make any functional difference.

src/input/decoder.c

@@ -423,7 +423,7 @@ bool input_DecoderIsEmpty( decoder_t * p_dec )
         /* TODO subtitles support */
         if( p_dec->fmt_out.i_cat == VIDEO_ES && p_owner->p_vout )
             b_empty = vout_IsEmpty( p_owner->p_vout );
-        else if( p_dec->fmt_out.i_cat == AUDIO_ES && p_owner->p_aout && p_owner->p_aout_input )
+        else if( p_dec->fmt_out.i_cat == AUDIO_ES && p_owner->p_aout )
             b_empty = aout_InputIsEmpty( p_owner->p_aout, p_owner->p_aout_input );
         vlc_mutex_unlock( &p_owner->lock );
     }
@@ -1054,7 +1054,7 @@ static void DecoderOutputChangePause( decoder_t *p_dec, bool b_paused, mtime_t i
      */
     if( p_dec->fmt_out.i_cat == AUDIO_ES )
     {
-        if( p_owner->p_aout && p_owner->p_aout_input )
+        if( p_owner->p_aout )
             aout_DecChangePause( p_owner->p_aout, p_owner->p_aout_input,
                                  b_paused, i_date );
     }
@@ -1930,7 +1930,7 @@ static void DecoderProcessAudio( decoder_t *p_dec, block_t *p_block, bool b_flus
         DecoderDecodeAudio( p_dec, p_block );
     }
 
-    if( b_flush && p_owner->p_aout && p_owner->p_aout_input )
+    if( b_flush && p_owner->p_aout )
         aout_DecFlush( p_owner->p_aout, p_owner->p_aout_input );
 }
 
@@ -2109,14 +2109,12 @@ static void DeleteDecoder( decoder_t * p_dec )
     vlc_mutex_unlock( &p_owner->lock );
 
     /* Cleanup */
-    if( p_owner->p_aout_input )
-        aout_DecDelete( p_owner->p_aout, p_owner->p_aout_input );
     if( p_owner->p_aout )
     {
+        aout_DecDelete( p_owner->p_aout, p_owner->p_aout_input );
         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;
     }
     if( p_owner->p_vout )
     {
@@ -2229,16 +2227,19 @@ static aout_buffer_t *aout_new_buffer( decoder_t *p_dec, int i_samples )
               p_owner->audio.i_bytes_per_frame ) )
     {
         aout_input_t *p_aout_input = p_owner->p_aout_input;
+        aout_instance_t *p_aout = p_owner->p_aout;
 
         /* Parameters changed, restart the aout */
         vlc_mutex_lock( &p_owner->lock );
 
         DecoderFlushBuffering( p_dec );
 
+        p_owner->p_aout = NULL;
         p_owner->p_aout_input = NULL;
         aout_DecDelete( p_owner->p_aout, p_aout_input );
 
         vlc_mutex_unlock( &p_owner->lock );
+        input_resource_RequestAout( p_owner->p_resource, p_aout );
     }
 
     if( p_owner->p_aout_input == NULL )
@@ -2272,13 +2273,19 @@ static aout_buffer_t *aout_new_buffer( decoder_t *p_dec, int i_samples )
         request_vout.pf_request_vout = aout_request_vout;
         request_vout.p_private = p_dec;
 
-        p_aout = p_owner->p_aout;
-        if( !p_aout )
+        assert( p_owner->p_aout == NULL );
         p_aout = input_resource_RequestAout( p_owner->p_resource, NULL );
         if( p_aout )
+        {
             p_aout_input = aout_DecNew( p_aout, &format,
                                         &p_dec->fmt_out.audio_replay_gain,
                                         &request_vout );
+            if( p_aout_input == NULL )
+            {
+                input_resource_RequestAout( p_owner->p_resource, p_aout );
+                p_aout = NULL;
+            }
+        }
         else
             p_aout_input = NULL;