[FFmpeg-devel] [PATCH] ffmpeg fft: fix broken opus on 3dnow

[Mikulas Patocka]

The commit b7c16a3f2c4921f613319938b8ee0e3d6fa83e8d ("x86: fft: Port to
cpuflags") breaks the opus decoder in ffmpeg when compiling for 3dnow. The
output is audible, but there's a lot of noise.

This could be tested by disabling sse and compiling ffmpeg on a processor
with 3dnow support:
CC='gcc -m32' ./configure --disable-sse --disable-sse2 --disable-sse3

The reason for the breakage is that the commit unintentionally changed the 
INTERL macro so that it is empty when compiling for 3dnow. This patch 
fixes it.

Signed-off-by: Mikulas Patocka <mikulas at twibright.com>

---
 libavcodec/x86/fft.asm |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Index: ffmpeg/libavcodec/x86/fft.asm
===================================================================
--- mplayer.orig/libavcodec/x86/fft.asm
+++ mplayer/libavcodec/x86/fft.asm
@@ -199,7 +199,7 @@ SECTION .text
     vextractf128  %4 %+ H(%5), %3, 0
     vextractf128   %4(%5 + 1), %2, 1
     vextractf128  %4 %+ H(%5 + 1), %3, 1
-%elif cpuflag(sse)
+%elif cpuflag(sse) || cpuflag(3dnow)
     mova     %3, %2
     unpcklps %2, %1
     unpckhps %3, %1