mirror of https://github.com/python/cpython
118 lines
3.0 KiB
C
118 lines
3.0 KiB
C
#include "yuv.h"
|
|
|
|
void
|
|
yuv_sv411_to_cl422dc(int invert, void *data, void *yuv, int width, int height)
|
|
{
|
|
struct yuv411 *in = data;
|
|
struct yuv422 *out_even = yuv;
|
|
struct yuv422 *out_odd = out_even + width / 2;
|
|
int i, j; /* counters */
|
|
|
|
for (i = height / 2; i--; ) {
|
|
for (j = width / 4; j--; ) {
|
|
YUV422_Y0(*out_even) = YUV411_Y00(*in);
|
|
YUV422_U0(*out_even) = YUV411_U00(*in);
|
|
YUV422_V0(*out_even) = YUV411_V00(*in);
|
|
YUV422_Y1(*out_even) = YUV411_Y01(*in);
|
|
out_even++;
|
|
YUV422_Y0(*out_even) = YUV411_Y02(*in);
|
|
YUV422_U0(*out_even) = YUV411_U02(*in);
|
|
YUV422_V0(*out_even) = YUV411_V02(*in);
|
|
YUV422_Y1(*out_even) = YUV411_Y03(*in);
|
|
out_even++;
|
|
YUV422_Y0(*out_odd) = YUV411_Y10(*in);
|
|
YUV422_U0(*out_odd) = YUV411_U10(*in);
|
|
YUV422_V0(*out_odd) = YUV411_V10(*in);
|
|
YUV422_Y1(*out_odd) = YUV411_Y11(*in);
|
|
out_odd++;
|
|
YUV422_Y0(*out_odd) = YUV411_Y12(*in);
|
|
YUV422_U0(*out_odd) = YUV411_U12(*in);
|
|
YUV422_V0(*out_odd) = YUV411_V12(*in);
|
|
YUV422_Y1(*out_odd) = YUV411_Y13(*in);
|
|
out_odd++;
|
|
in++;
|
|
}
|
|
out_even += width / 2;
|
|
out_odd += width / 2;
|
|
}
|
|
}
|
|
|
|
void
|
|
yuv_sv411_to_cl422dc_quartersize(int invert, void *data, void *yuv,
|
|
int width, int height)
|
|
{
|
|
int w4 = width / 4; /* quarter of width is used often */
|
|
struct yuv411 *in_even = data;
|
|
struct yuv411 *in_odd = in_even + w4;
|
|
struct yuv422 *out_even = yuv;
|
|
struct yuv422 *out_odd = out_even + w4;
|
|
int i, j; /* counters */
|
|
int u, v; /* U and V values */
|
|
|
|
for (i = height / 4; i--; ) {
|
|
for (j = w4; j--; ) {
|
|
u = YUV411_U00(*in_even);
|
|
v = YUV411_V00(*in_even);
|
|
|
|
YUV422_Y0(*out_even) = YUV411_Y00(*in_even);
|
|
YUV422_U0(*out_even) = u;
|
|
YUV422_V0(*out_even) = v;
|
|
YUV422_Y1(*out_even) = YUV411_Y02(*in_even);
|
|
|
|
YUV422_Y0(*out_odd) = YUV411_Y10(*in_odd);
|
|
YUV422_U0(*out_odd) = u;
|
|
YUV422_V0(*out_odd) = v;
|
|
YUV422_Y1(*out_odd) = YUV411_Y12(*in_odd);
|
|
|
|
in_even++;
|
|
in_odd++;
|
|
out_even++;
|
|
out_odd++;
|
|
}
|
|
in_even += w4;
|
|
in_odd += w4;
|
|
out_even += w4;
|
|
out_odd += w4;
|
|
}
|
|
}
|
|
|
|
void
|
|
yuv_sv411_to_cl422dc_sixteenthsize(int invert, void *data, void *yuv,
|
|
int width, int height)
|
|
{
|
|
int w4_3 = 3 * width / 4; /* three quarters of width is used often */
|
|
int w8 = width / 8; /* and so is one eighth */
|
|
struct yuv411 *in_even = data;
|
|
struct yuv411 *in_odd = in_even + width / 2;
|
|
struct yuv422 *out_even = yuv;
|
|
struct yuv422 *out_odd = out_even + w8;
|
|
int i, j; /* counters */
|
|
int u, v; /* U and V values */
|
|
|
|
for (i = height / 8; i--; ) {
|
|
for (j = w8; j--; ) {
|
|
u = YUV411_U00(in_even[0]);
|
|
v = YUV411_V00(in_even[0]);
|
|
|
|
YUV422_Y0(*out_even) = YUV411_Y00(in_even[0]);
|
|
YUV422_U0(*out_even) = u;
|
|
YUV422_V0(*out_even) = v;
|
|
YUV422_Y1(*out_even) = YUV411_Y00(in_even[1]);
|
|
|
|
YUV422_Y0(*out_odd) = YUV411_Y00(in_odd[0]);
|
|
YUV422_U0(*out_odd) = u;
|
|
YUV422_V0(*out_odd) = v;
|
|
YUV422_Y1(*out_odd) = YUV411_Y00(in_even[1]);
|
|
|
|
in_even += 2;
|
|
in_odd += 2;
|
|
out_even++;
|
|
out_odd++;
|
|
}
|
|
in_even += w4_3;
|
|
in_odd += w4_3;
|
|
out_even += w8;
|
|
out_odd += w8;
|
|
}
|
|
}
|