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-rw-r--r--gst/spectrum/gstspectrum.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/gst/spectrum/gstspectrum.c b/gst/spectrum/gstspectrum.c
index 3747b249..4cbd889b 100644
--- a/gst/spectrum/gstspectrum.c
+++ b/gst/spectrum/gstspectrum.c
@@ -405,7 +405,10 @@ gst_spectrum_transform_ip (GstBaseTransform * trans, GstBuffer * in)
samples = (const gint16 *) gst_adapter_peek (spectrum->adapter, wanted);
+ /* the current fft code is gint16 based, so supporting other formats would
+ * not really benefit now */
for (i = 0, j = 0; i < spectrum->len; i++) {
+ /* convert to mono */
for (k = 0, acc = 0; k < spectrum->channels; k++)
acc += samples[j++];
spectrum->re[i] = (gint16) (acc / spectrum->channels);