/* * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */#include "config.h"#include <inttypes.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)