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When bswap_32 is a macro, png images fail to decode properly, patch by (Milan Cutka <cutka>at<szm>dot<sk>)

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Originally committed as revision 3672 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Milan Cutka
2004-11-12 09:48:06 +00:00
committed by Michael Niedermayer
parent 788d7a8cac
commit e20815b396
1 changed files with 3 additions and 1 deletions
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4
libavcodec/png.c
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@ -501,12 +501,14 @@ static int decode_frame(AVCodecContext *avctx,
if (ret != Z_OK) if (ret != Z_OK)
return -1; return -1;
for(;;) { for(;;) {
int tag32;
if (s->bytestream >= s->bytestream_end) if (s->bytestream >= s->bytestream_end)
goto fail; goto fail;
length = get32(&s->bytestream); length = get32(&s->bytestream);
if (length > 0x7fffffff) if (length > 0x7fffffff)
goto fail; goto fail;
tag = bswap_32(get32(&s->bytestream)); tag32 = get32(&s->bytestream);
tag = bswap_32(tag32);
#ifdef DEBUG #ifdef DEBUG
printf("png: tag=%c%c%c%c length=%u\n", printf("png: tag=%c%c%c%c length=%u\n",
(tag & 0xff), (tag & 0xff),