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Code Issues Releases Activity

DCA: use some type-punning in qmf_32_subbands()

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Originally committed as revision 22847 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Måns Rullgård 2010-04-12 11:14:48 +00:00
parent 6b174197b5
commit 0dc7df28dd
1 changed files with 3 additions and 2 deletions
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5
libavcodec/dca.c
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@ -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;