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79 lines
1.8 KiB
C
79 lines
1.8 KiB
C
/* GStreamer
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* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#include "config.h"
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#include <math.h>
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#include <stdlib.h>
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#include <string.h>
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#include <gst/gst.h>
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/*#undef HAVE_LIBMMX */
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#ifdef HAVE_LIBMMX
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#include "mmx.h"
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#endif
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void gst_colorspace_yuy2_to_i420(unsigned char *src, unsigned char *dest, guint width, guint height)
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{
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int size, i, j;
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guchar *desty, *destr, *destb;
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size = width * height;
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desty = dest;
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destr = desty + size;
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destb = destr + (size>>2);
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for (i=0; i<height; i++) {
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for (j=0; j<(width>>1); j++) {
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*desty++ = *src;
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*desty++ = *(src+2);
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if ((i&1) == 0) {
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*destr++ = *(src+1);
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*destb++ = *(src+3);
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}
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src += 4;
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}
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}
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}
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void gst_colorspace_i420_to_yv12(unsigned char *src, unsigned char *dest, guint width, guint height)
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{
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int size, i;
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guint8 *destcr, *destcb;
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size = width * height;
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memcpy (dest, src, size);
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src += size;
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destcr = dest + size;
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size >>=2;
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destcb = destcr + size;
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i=size;
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while (i--)
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*destcb++ = *src++;
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i=size;
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while (i--)
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*destcr++ = *src++;
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}
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