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ffmpegcolorspace: Add direct UYVY->GRAY8 conversion

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The conversion from UYVY to RGB24 and then to GRAY8
is quite slow. Fixes bug #569655.
This commit is contained in:
Jonas Danielsson 2009-02-24 13:42:01 +01:00 committed by Sebastian Dröge
parent d24e75f9fa
commit 0842dd1c6f
1 changed files with 26 additions and 0 deletions
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26
gst/ffmpegcolorspace/imgconvert.c
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@ -817,6 +817,31 @@ yuv422_to_yuv420p (AVPicture * dst, const AVPicture * src,
}
}
static void
uyvy422_to_gray (AVPicture * dst, const AVPicture * src, int width, int height)
{
const uint8_t *p, *p1;
uint8_t *lum, *lum1;
int w;
p1 = src->data[0];
lum1 = dst->data[0];
for (; height > 0; height--) {
p = p1;
lum = lum1;
for (w = width; w >= 2; w -= 2) {
lum[0] = p[1];
lum[1] = p[3];
p += 4;
lum += 2;
}
p1 += src->linesize[0];
lum1 += dst->linesize[0];
}
}
static void
uyvy422_to_yuv420p (AVPicture * dst, const AVPicture * src,
int width, int height)
@ -2172,6 +2197,7 @@ static ConvertEntry convert_table[] = {
{PIX_FMT_UYVY422, PIX_FMT_YUV420P, uyvy422_to_yuv420p},
{PIX_FMT_UYVY422, PIX_FMT_YUV422P, uyvy422_to_yuv422p},
{PIX_FMT_UYVY422, PIX_FMT_GRAY8, uyvy422_to_gray},
{PIX_FMT_RGB24, PIX_FMT_YUV420P, rgb24_to_yuv420p},
{PIX_FMT_RGB24, PIX_FMT_NV12, rgb24_to_nv12},