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YUV410P to YUV420P patch by François Revol <revol at free dot fr> 

Originally committed as revision 783 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
François Revol 2002-07-21 07:54:53 +00:00 committed by Michael Niedermayer
parent 3e6a20a0cd
commit 6742d95d59
1 changed files with 39 additions and 0 deletions
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39
libavcodec/imgconvert.c
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@ -245,6 +245,34 @@ static void shrink22(UINT8 *dst, int dst_wrap,
}
}
/* 1x1 -> 2x2 */
static void grow22(UINT8 *dst, int dst_wrap,
UINT8 *src, int src_wrap,
int width, int height)
{
int w;
UINT8 *s1, *d;
for(;height > 0; height--) {
s1 = src;
d = dst;
for(w = width;w >= 4; w-=4) {
d[1] = d[0] = s1[0];
d[3] = d[2] = s1[1];
s1 += 2;
d += 4;
}
for(;w > 0; w--) {
d[0] = s1[0];
s1 ++;
d++;
}
if (height%2)
src += src_wrap;
dst += dst_wrap;
}
}
static void img_copy(UINT8 *dst, int dst_wrap,
UINT8 *src, int src_wrap,
int width, int height)
@ -382,6 +410,17 @@ int img_convert(AVPicture *dst, int dst_pix_fmt,
} else if (dst_pix_fmt == PIX_FMT_YUV420P) {
switch(pix_fmt) {
case PIX_FMT_YUV410P:
img_copy(dst->data[0], dst->linesize[0],
src->data[0], src->linesize[0],
width, height);
grow22(dst->data[1], dst->linesize[1],
src->data[1], src->linesize[1],
width/2, height/2);
grow22(dst->data[2], dst->linesize[2],
src->data[2], src->linesize[2],
width/2, height/2);
break;
case PIX_FMT_YUV420P:
for(i=0;i<3;i++) {
img_copy(dst->data[i], dst->linesize[i],