decoder/mpcdec: fix negative shift on fixed-point samples

"There is a bug in fixed-point musepack (musepack_src_r435) playback. In floating-point audio is OK but in fixed audio is distorted. I have made a patch for this"

decoder/mpcdec: fix negative shift on fixed-point samples
96033e4b · Piotr Gozdur · Max Kellermann · 9134169e · 96033e4b · 96033e4b
Commit 96033e4b authored Mar 17, 2010 by Piotr Gozdur Committed by Max Kellermann Mar 17, 2010
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NEWS NEWS +1 -0

mpcdec_plugin.c src/decoder/mpcdec_plugin.c +1 -1

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--- a/NEWS
+++ b/NEWS
 ver 0.15.9 (2009/??/??)
 * decoders:
  - mad: fix crash when seeking at end of song
+  - mpcdec: fix negative shift on fixed-point samples
 * playlist: fix single+repeat in random mode

--- a/src/decoder/mpcdec_plugin.c
+++ b/src/decoder/mpcdec_plugin.c
@@ -103,7 +103,7 @@ mpc_to_mpd_sample(MPC_SAMPLE_FORMAT sample)
 	const int shift = bits - MPC_FIXED_POINT_SCALE_SHIFT;
 	if (shift < 0)
-		val = sample << -shift;
+		val = sample >> -shift;
 	else
 		val = sample << shift;
 #else