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minimum support for YUV411P (new combined scaler/converter will handle that better...)

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Originally committed as revision 1013 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Fabrice Bellard 2002-10-08 17:42:33 +00:00
parent 47fa9c203a
commit 789587d595
1 changed files with 36 additions and 0 deletions
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36
libavcodec/imgconvert.c
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@ -399,6 +399,31 @@ static void grow22(UINT8 *dst, int dst_wrap,
}
}
/* 1x2 -> 2x1. width and height are given for the source picture */
static void conv411(UINT8 *dst, int dst_wrap,
UINT8 *src, int src_wrap,
int width, int height)
{
int w, c;
UINT8 *s1, *s2, *d;
for(;height > 0; height -= 2) {
s1 = src;
s2 = src + src_wrap;
d = dst;
for(w = width;w > 0; w--) {
c = (s1[0] + s2[0]) >> 1;
d[0] = c;
d[1] = c;
s1++;
s2++;
d += 2;
}
src += src_wrap * 2;
dst += dst_wrap;
}
}
static void img_copy(UINT8 *dst, int dst_wrap,
UINT8 *src, int src_wrap,
int width, int height)
@ -628,6 +653,17 @@ int img_convert(AVPicture *dst, int dst_pix_fmt,
} else if (dst_pix_fmt == PIX_FMT_YUV420P) {
switch(pix_fmt) {
case PIX_FMT_YUV411P:
img_copy(dst->data[0], dst->linesize[0],
src->data[0], src->linesize[0],
width, height);
conv411(dst->data[1], dst->linesize[1],
src->data[1], src->linesize[1],
width / 4, height);
conv411(dst->data[2], dst->linesize[2],
src->data[2], src->linesize[2],
width / 4, height);
break;
case PIX_FMT_YUV410P:
img_copy(dst->data[0], dst->linesize[0],
src->data[0], src->linesize[0],