[FFmpeg-devel] [PATCH 1/5] DCA: use some type-punning in qmf_32_subbands()
Kostya
kostya.shishkov
Mon Apr 12 05:33:29 CEST 2010
On Sun, Apr 11, 2010 at 11:05:50PM +0100, Mans Rullgard wrote:
> ---
> libavcodec/dca.c | 5 +++--
> 1 files changed, 3 insertions(+), 2 deletions(-)
>
> 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;
looks ok
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