audio-converter: In passthrough, also don't copy if in and out block are the same

In and out array are usually different, they are stack allocated arrays.
However the blocks inside them still can be the same.

https://bugzilla.gnome.org/show_bug.cgi?id=775369

diff --git a/gst-libs/gst/audio/audio-converter.c b/gst-libs/gst/audio/audio-converter.c
index 2d6ad72..e4394c2 100644 (file)
--- a/gst-libs/gst/audio/audio-converter.c
+++ b/gst-libs/gst/audio/audio-converter.c
@@ -851,8 +851,14 @@ converter_passthrough (GstAudioConverter * convert,
 
     bytes = samples * (convert->in.bpf / convert->in.channels);
 
-    for (i = 0; i < chain->blocks; i++)
+    for (i = 0; i < chain->blocks; i++) {
+      if (out[i] == in[i]) {
+        g_assert (convert->in_place);
+        continue;
+      }
+
       memcpy (out[i], in[i], bytes);
+    }
   } else {
     for (i = 0; i < chain->blocks; i++)
       gst_audio_format_fill_silence (convert->in.finfo, out[i], samples);