mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-15 22:01:27 +00:00
110 lines
3 KiB
C
110 lines
3 KiB
C
/* GStreamer
|
|
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
|
|
* 2000 Wim Taymans <wtay@chello.be>
|
|
* 2003 Colin Walters <walters@verbum.org>
|
|
*
|
|
* gstcpu.c: CPU detection and architecture-specific routines
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Library General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2 of the License, or (at your option) any later version.
|
|
*
|
|
* This library 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
|
|
* Library General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Library General Public
|
|
* License along with this library; if not, write to the
|
|
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
* Boston, MA 02111-1307, USA.
|
|
*/
|
|
|
|
#include <glib.h>
|
|
|
|
#include "gst_private.h"
|
|
#include "gstcpu.h"
|
|
|
|
static guint32 _gst_cpu_flags = 0;
|
|
|
|
#ifdef HAVE_CPU_I386
|
|
#define _gst_cpu_initialize_arch _gst_cpu_initialize_i386
|
|
void gst_cpuid_i386 (int, unsigned long *, unsigned long *, unsigned long *, unsigned long *);
|
|
#else
|
|
#define _gst_cpu_initialize_arch _gst_cpu_initialize_none
|
|
#endif
|
|
|
|
gboolean _gst_cpu_initialize_i386 (gulong *flags, GString *featurelist);
|
|
|
|
void
|
|
_gst_cpu_initialize (gboolean opt)
|
|
{
|
|
GString *featurelist = g_string_new ("");
|
|
gulong flags = 0;
|
|
|
|
if (opt) {
|
|
if (!_gst_cpu_initialize_arch (&flags, featurelist))
|
|
g_string_append (featurelist, "NONE");
|
|
} else
|
|
g_string_append (featurelist, "(DISABLED)");
|
|
|
|
GST_INFO (GST_CAT_GST_INIT, "CPU features: (%08lx) %s", flags, featurelist->str);
|
|
g_string_free (featurelist, TRUE);
|
|
}
|
|
|
|
gboolean
|
|
_gst_cpu_initialize_none (gulong *flags, GString *featurelist)
|
|
{
|
|
return FALSE;
|
|
}
|
|
|
|
gboolean
|
|
_gst_cpu_initialize_i386 (gulong *flags, GString *featurelist)
|
|
{
|
|
gboolean AMD;
|
|
gulong eax = 0, ebx = 0, ecx = 0, edx = 0;
|
|
|
|
gst_cpuid_i386 (0, &eax, &ebx, &ecx, &edx);
|
|
|
|
AMD = (ebx == 0x68747541) && (ecx == 0x444d4163) && (edx == 0x69746e65);
|
|
|
|
gst_cpuid_i386 (1, &eax, &ebx, &ecx, &edx);
|
|
|
|
if (edx & (1 << 23)) {
|
|
_gst_cpu_flags |= GST_CPU_FLAG_MMX;
|
|
g_string_append (featurelist, "MMX ");
|
|
|
|
if (edx & (1 << 25)) {
|
|
_gst_cpu_flags |= GST_CPU_FLAG_SSE;
|
|
_gst_cpu_flags |= GST_CPU_FLAG_MMXEXT;
|
|
g_string_append (featurelist, "SSE ");
|
|
}
|
|
|
|
gst_cpuid_i386 (0x80000000, &eax, &ebx, &ecx, &edx);
|
|
|
|
if (eax >= 0x80000001) {
|
|
|
|
gst_cpuid_i386 (0x80000001, &eax, &ebx, &ecx, &edx);
|
|
|
|
if (edx & (1 << 31)) {
|
|
_gst_cpu_flags |= GST_CPU_FLAG_3DNOW;
|
|
g_string_append (featurelist, "3DNOW ");
|
|
}
|
|
if (AMD && (edx & (1 << 22))) {
|
|
_gst_cpu_flags |= GST_CPU_FLAG_MMXEXT;
|
|
g_string_append (featurelist, "MMXEXT ");
|
|
}
|
|
}
|
|
}
|
|
*flags = eax;
|
|
if (_gst_cpu_flags)
|
|
return TRUE;
|
|
return FALSE;
|
|
}
|
|
|
|
GstCPUFlags
|
|
gst_cpu_get_flags (void)
|
|
{
|
|
return _gst_cpu_flags;
|
|
}
|