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yuv-to-rgb.c is not correct though it is faster

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rustdesk
2022-01-29 20:45:53 +08:00
parent bf9badb10e
commit 9de2944d6b
6 changed files with 1473 additions and 13 deletions
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16
yuv-to-rgb.c
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@@ -45,7 +45,7 @@ static int foo;
static int frame;
void
AVX_YUV_to_RGBA(unsigned char *dst, unsigned char *y, unsigned char* u, unsigned char* v, int width, int height) {
AVX_YUV_to_ARGB(unsigned char *dst, unsigned char *y, int ystride, unsigned char* u, int ustride, unsigned char* v, int vstride, int width, int height) {
int r, g, b;
unsigned char *uline, *vline;
int w, h;
@@ -54,27 +54,27 @@ AVX_YUV_to_RGBA(unsigned char *dst, unsigned char *y, unsigned char* u, unsigned
initialized = !0;
build_tables();
}
int half_width = width / 2;
// Loop the image, taking into account sub-sample for the chroma channels
for (h = 0; h < height; h++) {
uline = u;
vline = v;
for (w = 0; w < width; w++, y++) {
for (w = 0; w < width; w++) {
r = *y + T1[*vline];
g = *y + T2[*vline] + T3[*uline];
b = *y + T4[*uline];
*dst++ = clamp(r); // 16-bit to 8-bit, chuck precision
*dst++ = clamp(b); // 16-bit to 8-bit, chuck precision
*dst++ = clamp(g);
*dst++ = clamp(b);
*dst++ = 255;
*dst++ = clamp(r);
++dst;
if (w & 0x01) {
uline++;
vline++;
}
}
y += ystride;
if (h & 0x01) {
u += half_width;
v += half_width;
u += ustride;
v += vstride;
}
}
}