[SCM] libav/experimental: DCA: use some type-punning in qmf_32_subbands()
siretart at users.alioth.debian.org
siretart at users.alioth.debian.org
Sun Jun 30 17:05:57 UTC 2013
The following commit has been merged in the experimental branch:
commit 0dc7df28dd50167722550fb20c57327398e32e9f
Author: Måns Rullgård <mans at mansr.com>
Date: Mon Apr 12 11:14:48 2010 +0000
DCA: use some type-punning in qmf_32_subbands()
Originally committed as revision 22847 to svn://svn.ffmpeg.org/ffmpeg/trunk
diff --git a/libavcodec/dca.c b/libavcodec/dca.c
index dc164e4..596756c 100644
--- a/libavcodec/dca.c
+++ b/libavcodec/dca.c
@@ -30,6 +30,7 @@
#include <stddef.h>
#include <stdio.h>
+#include "libavutil/intreadwrite.h"
#include "avcodec.h"
#include "dsputil.h"
#include "fft.h"
@@ -770,8 +771,8 @@ static void qmf_32_subbands(DCAContext * s, int chans,
for (subindex = 0; subindex < 8; subindex++) {
/* Load in one sample from each subband and clear inactive subbands */
for (i = 0; i < s->subband_activity[chans]; i++){
- if((i-1)&2) s->raXin[i] = -samples_in[i][subindex];
- else s->raXin[i] = samples_in[i][subindex];
+ uint32_t v = AV_RN32A(&samples_in[i][subindex]) ^ ((i-1)&2)<<30;
+ AV_WN32A(&s->raXin[i], v);
}
for (; i < 32; i++)
s->raXin[i] = 0.0;
--
Libav/FFmpeg packaging
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