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-rwxr-xr-xk9decmpeg/motion_comp.cpp130
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diff --git a/k9decmpeg/motion_comp.cpp b/k9decmpeg/motion_comp.cpp
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+/*
+ * motion_comp.c
+ * Copyright (C) 2000-2003 Michel Lespinasse <walken@zoy.org>
+ * Copyright (C) 1999-2000 Aaron Holtzman <aholtzma@ess.engr.uvic.ca>
+ *
+ * This file is part of mpeg2dec, a free MPEG-2 video stream decoder.
+ * See http://libmpeg2.sourceforge.net/ for updates.
+ *
+ * mpeg2dec is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * mpeg2dec is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "config.h"
+
+#include "k9common.h"
+
+#include "mpeg2.h"
+#include "attributes.h"
+#include "mpeg2_internal.h"
+
+mpeg2_mc_t mpeg2_mc;
+
+void mpeg2_mc_init (uint32_t accel)
+{
+#ifdef ARCH_X86
+ if (accel & MPEG2_ACCEL_X86_MMXEXT)
+ mpeg2_mc = mpeg2_mc_mmxext;
+ else if (accel & MPEG2_ACCEL_X86_3DNOW)
+ mpeg2_mc = mpeg2_mc_3dnow;
+ else if (accel & MPEG2_ACCEL_X86_MMX)
+ mpeg2_mc = mpeg2_mc_mmx;
+ else
+#endif
+#ifdef ARCH_PPC
+ if (accel & MPEG2_ACCEL_PPC_ALTIVEC)
+ mpeg2_mc = mpeg2_mc_altivec;
+ else
+#endif
+#ifdef ARCH_ALPHA
+ if (accel & MPEG2_ACCEL_ALPHA)
+ mpeg2_mc = mpeg2_mc_alpha;
+ else
+#endif
+#ifdef ARCH_SPARC
+ if (accel & MPEG2_ACCEL_SPARC_VIS)
+ mpeg2_mc = mpeg2_mc_vis;
+ else
+#endif
+ mpeg2_mc = mpeg2_mc_c;
+}
+
+#define avg2(a,b) ((a+b+1)>>1)
+#define avg4(a,b,c,d) ((a+b+c+d+2)>>2)
+
+#define predict_o(i) (ref[i])
+#define predict_x(i) (avg2 (ref[i], ref[i+1]))
+#define predict_y(i) (avg2 (ref[i], (ref+stride)[i]))
+#define predict_xy(i) (avg4 (ref[i], ref[i+1], \
+ (ref+stride)[i], (ref+stride)[i+1]))
+
+#define put(predictor,i) dest[i] = predictor (i)
+#define avg(predictor,i) dest[i] = avg2 (predictor (i), dest[i])
+
+/* mc function template */
+
+#define MC_FUNC(op,xy) \
+static void MC_##op##_##xy##_16_c (uint8_t * dest, const uint8_t * ref, \
+ const int stride, int height) \
+{ \
+ do { \
+ op (predict_##xy, 0); \
+ op (predict_##xy, 1); \
+ op (predict_##xy, 2); \
+ op (predict_##xy, 3); \
+ op (predict_##xy, 4); \
+ op (predict_##xy, 5); \
+ op (predict_##xy, 6); \
+ op (predict_##xy, 7); \
+ op (predict_##xy, 8); \
+ op (predict_##xy, 9); \
+ op (predict_##xy, 10); \
+ op (predict_##xy, 11); \
+ op (predict_##xy, 12); \
+ op (predict_##xy, 13); \
+ op (predict_##xy, 14); \
+ op (predict_##xy, 15); \
+ ref += stride; \
+ dest += stride; \
+ } while (--height); \
+} \
+static void MC_##op##_##xy##_8_c (uint8_t * dest, const uint8_t * ref, \
+ const int stride, int height) \
+{ \
+ do { \
+ op (predict_##xy, 0); \
+ op (predict_##xy, 1); \
+ op (predict_##xy, 2); \
+ op (predict_##xy, 3); \
+ op (predict_##xy, 4); \
+ op (predict_##xy, 5); \
+ op (predict_##xy, 6); \
+ op (predict_##xy, 7); \
+ ref += stride; \
+ dest += stride; \
+ } while (--height); \
+}
+
+/* definitions of the actual mc functions */
+
+MC_FUNC (put,o)
+MC_FUNC (avg,o)
+MC_FUNC (put,x)
+MC_FUNC (avg,x)
+MC_FUNC (put,y)
+MC_FUNC (avg,y)
+MC_FUNC (put,xy)
+MC_FUNC (avg,xy)
+
+MPEG2_MC_EXTERN (c)