cpu_accel.c

从FFMPEG转换而来的H264解码程序,VC下编译..

/*
 * cpu_accel.c
 * Copyright (C) 2000-2004 Michel Lespinasse <[e-mail]>
 * Copyright (C) 1999-2000 Aaron Holtzman <[e-mail]>
 *
 * 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 <stddef.h>
#include <inttypes.h>

#include "config.h"
#include "mpeg2.h"
#include "attributes.h"
#include "mpeg2_internal.h"

#ifdef ARCH_X86
static inline uint32_t arch_accel (uint32_t accel)
{
    if (accel & (MPEG2_ACCEL_X86_3DNOW | MPEG2_ACCEL_X86_MMXEXT))
	accel |= MPEG2_ACCEL_X86_MMX;

    if (accel & (MPEG2_ACCEL_X86_SSE2 | MPEG2_ACCEL_X86_SSE3))
	accel |= MPEG2_ACCEL_X86_MMXEXT;

    if (accel & (MPEG2_ACCEL_X86_SSE3))
	accel |= MPEG2_ACCEL_X86_SSE2;

    return accel;
}
#endif /* ARCH_ALPHA */

uint32_t mpeg2_detect_accel (uint32_t accel)
{
#if defined (ARCH_X86) || defined (ARCH_PPC) || defined (ARCH_ALPHA) || defined (ARCH_SPARC)
    accel = arch_accel (accel);
#endif
    return accel;
}