149 lines
4.4 KiB
C
149 lines
4.4 KiB
C
/***********************************************************
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Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam,
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The Netherlands.
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All Rights Reserved
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Permission to use, copy, modify, and distribute this software and its
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documentation for any purpose and without fee is hereby granted,
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provided that the above copyright notice appear in all copies and that
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both that copyright notice and this permission notice appear in
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supporting documentation, and that the names of Stichting Mathematisch
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Centrum or CWI or Corporation for National Research Initiatives or
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CNRI not be used in advertising or publicity pertaining to
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distribution of the software without specific, written prior
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permission.
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While CWI is the initial source for this software, a modified version
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is made available by the Corporation for National Research Initiatives
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(CNRI) at the Internet address ftp://ftp.python.org.
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STICHTING MATHEMATISCH CENTRUM AND CNRI DISCLAIM ALL WARRANTIES WITH
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REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH
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CENTRUM OR CNRI BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL
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DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
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PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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PERFORMANCE OF THIS SOFTWARE.
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******************************************************************/
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#include "yuv.h"
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void
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yuv_sv411_to_cl422dc(int invert, void *data, void *yuv, int width, int height)
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{
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struct yuv411 *in = data;
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struct yuv422 *out_even = yuv;
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struct yuv422 *out_odd = out_even + width / 2;
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int i, j; /* counters */
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for (i = height / 2; i--; ) {
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for (j = width / 4; j--; ) {
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YUV422_Y0(*out_even) = YUV411_Y00(*in);
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YUV422_U0(*out_even) = YUV411_U00(*in);
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YUV422_V0(*out_even) = YUV411_V00(*in);
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YUV422_Y1(*out_even) = YUV411_Y01(*in);
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out_even++;
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YUV422_Y0(*out_even) = YUV411_Y02(*in);
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YUV422_U0(*out_even) = YUV411_U02(*in);
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YUV422_V0(*out_even) = YUV411_V02(*in);
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YUV422_Y1(*out_even) = YUV411_Y03(*in);
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out_even++;
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YUV422_Y0(*out_odd) = YUV411_Y10(*in);
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YUV422_U0(*out_odd) = YUV411_U10(*in);
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YUV422_V0(*out_odd) = YUV411_V10(*in);
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YUV422_Y1(*out_odd) = YUV411_Y11(*in);
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out_odd++;
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YUV422_Y0(*out_odd) = YUV411_Y12(*in);
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YUV422_U0(*out_odd) = YUV411_U12(*in);
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YUV422_V0(*out_odd) = YUV411_V12(*in);
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YUV422_Y1(*out_odd) = YUV411_Y13(*in);
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out_odd++;
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in++;
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}
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out_even += width / 2;
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out_odd += width / 2;
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}
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}
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void
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yuv_sv411_to_cl422dc_quartersize(int invert, void *data, void *yuv,
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int width, int height)
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{
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int w4 = width / 4; /* quarter of width is used often */
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struct yuv411 *in_even = data;
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struct yuv411 *in_odd = in_even + w4;
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struct yuv422 *out_even = yuv;
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struct yuv422 *out_odd = out_even + w4;
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int i, j; /* counters */
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int u, v; /* U and V values */
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for (i = height / 4; i--; ) {
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for (j = w4; j--; ) {
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u = YUV411_U00(*in_even);
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v = YUV411_V00(*in_even);
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YUV422_Y0(*out_even) = YUV411_Y00(*in_even);
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YUV422_U0(*out_even) = u;
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YUV422_V0(*out_even) = v;
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YUV422_Y1(*out_even) = YUV411_Y02(*in_even);
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YUV422_Y0(*out_odd) = YUV411_Y10(*in_odd);
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YUV422_U0(*out_odd) = u;
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YUV422_V0(*out_odd) = v;
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YUV422_Y1(*out_odd) = YUV411_Y12(*in_odd);
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in_even++;
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in_odd++;
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out_even++;
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out_odd++;
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}
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in_even += w4;
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in_odd += w4;
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out_even += w4;
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out_odd += w4;
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}
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}
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void
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yuv_sv411_to_cl422dc_sixteenthsize(int invert, void *data, void *yuv,
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int width, int height)
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{
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int w4_3 = 3 * width / 4; /* three quarters of width is used often */
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int w8 = width / 8; /* and so is one eighth */
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struct yuv411 *in_even = data;
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struct yuv411 *in_odd = in_even + width / 2;
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struct yuv422 *out_even = yuv;
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struct yuv422 *out_odd = out_even + w8;
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int i, j; /* counters */
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int u, v; /* U and V values */
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for (i = height / 8; i--; ) {
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for (j = w8; j--; ) {
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u = YUV411_U00(in_even[0]);
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v = YUV411_V00(in_even[0]);
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YUV422_Y0(*out_even) = YUV411_Y00(in_even[0]);
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YUV422_U0(*out_even) = u;
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YUV422_V0(*out_even) = v;
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YUV422_Y1(*out_even) = YUV411_Y00(in_even[1]);
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YUV422_Y0(*out_odd) = YUV411_Y00(in_odd[0]);
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YUV422_U0(*out_odd) = u;
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YUV422_V0(*out_odd) = v;
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YUV422_Y1(*out_odd) = YUV411_Y00(in_even[1]);
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in_even += 2;
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in_odd += 2;
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out_even++;
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out_odd++;
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}
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in_even += w4_3;
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in_odd += w4_3;
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out_even += w8;
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out_odd += w8;
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}
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}
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