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v210enc: clip values according to specifications

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Signed-off-by: Anton Khirnov <anton@khirnov.net>
This commit is contained in:
Baptiste Coudurier
2011-05-08 17:58:20 +02:00
committed by Anton Khirnov
parent d239b83e2e
commit 635bbecfc3
1 changed files with 8 additions and 6 deletions
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14
libavcodec/v210enc.c
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@@ -66,11 +66,13 @@ static int encode_frame(AVCodecContext *avctx, unsigned char *buf,
return -1;
}
#define CLIP(v) av_clip(v, 4, 1019)
#define WRITE_PIXELS(a, b, c) \
do { \
val = *a++; \
val |= (*b++ << 10) | \
(*c++ << 20); \
val = CLIP(*a++); \
val |= (CLIP(*b++) << 10) | \
(CLIP(*c++) << 20); \
bytestream_put_le32(&p, val); \
} while (0)
@@ -85,15 +87,15 @@ static int encode_frame(AVCodecContext *avctx, unsigned char *buf,
if (w < avctx->width - 1) {
WRITE_PIXELS(u, y, v);
val = *y++;
val = CLIP(*y++);
if (w == avctx->width - 2)
bytestream_put_le32(&p, val);
}
if (w < avctx->width - 3) {
val |= (*u++ << 10) | (*y++ << 20);
val |= (CLIP(*u++) << 10) | (CLIP(*y++) << 20);
bytestream_put_le32(&p, val);
val = *v++ | (*y++ << 10);
val = CLIP(*v++) | (CLIP(*y++) << 10);
bytestream_put_le32(&p, val);
}