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YUV420P to YUV422 conversion routine by (Danny Laarmans <dlaarmans at androme dot com>) 

Originally committed as revision 3642 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2004-10-27 21:42:26 +00:00
parent ab711b3c8d
commit d7e2f57f0e
1 changed files with 36 additions and 0 deletions
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36
libavcodec/imgconvert.c
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@ -922,6 +922,39 @@ static void uyvy411_to_yuv411p(AVPicture *dst, const AVPicture *src,
}
static void yuv420p_to_yuv422(AVPicture *dst, const AVPicture *src,
int width, int height)
{
int w, h;
uint8_t *line1, *line2, *linesrc = dst->data[0];
uint8_t *lum1, *lum2, *lumsrc = src->data[0];
uint8_t *cb1, *cb2 = src->data[1];
uint8_t *cr1, *cr2 = src->data[2];
for(h = height / 2; h--;) {
line1 = linesrc;
line2 = linesrc + dst->linesize[0];
lum1 = lumsrc;
lum2 = lumsrc + src->linesize[0];
cb1 = cb2;
cr1 = cr2;
for(w = width / 2; w--;) {
*line1++ = *lum1++; *line2++ = *lum2++;
*line1++ = *line2++ = *cb1++;
*line1++ = *lum1++; *line2++ = *lum2++;
*line1++ = *line2++ = *cr1++;
}
linesrc += dst->linesize[0] * 2;
lumsrc += src->linesize[0] * 2;
cb2 += src->linesize[1];
cr2 += src->linesize[2];
}
}
#define SCALEBITS 10
#define ONE_HALF (1 << (SCALEBITS - 1))
#define FIX(x) ((int) ((x) * (1<<SCALEBITS) + 0.5))
@ -1631,6 +1664,9 @@ typedef struct ConvertEntry {
*/
static ConvertEntry convert_table[PIX_FMT_NB][PIX_FMT_NB] = {
[PIX_FMT_YUV420P] = {
[PIX_FMT_YUV422] = {
.convert = yuv420p_to_yuv422,
},
[PIX_FMT_RGB555] = {
.convert = yuv420p_to_rgb555
},