X-Git-Url: http://git.cinelerra-gg.org/git/?a=blobdiff_plain;ds=sidebyside;f=cinelerra-5.1%2Fmpeg2enc%2Fcpu_accel.c;fp=cinelerra-5.1%2Fmpeg2enc%2Fcpu_accel.c;h=f898d25f088df6f6dbced51c7a0c2c756412251a;hb=30bdb85eb33a8ee7ba675038a86c6be59c43d7bd;hp=0000000000000000000000000000000000000000;hpb=52fcc46226f9df46f9ce9d0566dc568455a7db0b;p=goodguy%2Fhistory.git

diff --git a/cinelerra-5.1/mpeg2enc/cpu_accel.c b/cinelerra-5.1/mpeg2enc/cpu_accel.c
new file mode 100644
index 00000000..f898d25f
--- /dev/null
+++ b/cinelerra-5.1/mpeg2enc/cpu_accel.c
@@ -0,0 +1,106 @@
+/*
+ * cpu_accel.c
+ * Copyright (C) 1999-2000 Aaron Holtzman <aholtzma@ess.engr.uvic.ca>
+ *
+ * This file is part of mpeg2dec, a free MPEG-2 video stream decoder.
+ *
+ * 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 <stdio.h>
+#include <inttypes.h>
+
+#include "cpu_accel.h"
+
+#ifdef X86_CPU
+static int x86_accel (void)
+{
+    int eax, ebx, ecx, edx;
+    int AMD;
+    int caps;
+
+#define cpuid(op,eax,ebx,ecx,edx)	\
+    asm ("cpuid"			\
+	 : "=a" (eax),			\
+	   "=b" (ebx),			\
+	   "=c" (ecx),			\
+	   "=d" (edx)			\
+	 : "a" (op)			\
+	 : "cc")
+
+    asm ("pushfl\n\t"
+	 "popl %0\n\t"
+	 "movl %0,%1\n\t"
+	 "xorl $0x200000,%0\n\t"
+	 "pushl %0\n\t"
+	 "popfl\n\t"
+	 "pushfl\n\t"
+	 "popl %0"
+         : "=a" (eax),
+	   "=b" (ebx)
+	 :
+	 : "cc");
+
+    if (eax == ebx)		// no cpuid
+	return 0;
+
+    cpuid (0x00000000, eax, ebx, ecx, edx);
+    if (!eax)			// vendor string only
+	return 0;
+
+    AMD = (ebx == 0x68747541) && (ecx == 0x444d4163) && (edx == 0x69746e65);
+
+    cpuid (0x00000001, eax, ebx, ecx, edx);
+    if (! (edx & 0x00800000))	// no MMX
+	return 0;
+
+    caps = ACCEL_X86_MMX;
+    if (edx & 0x02000000)	// SSE - identical to AMD MMX extensions
+	caps = ACCEL_X86_MMX | ACCEL_X86_MMXEXT;
+
+    cpuid (0x80000000, eax, ebx, ecx, edx);
+    if (eax < 0x80000001)	// no extended capabilities
+	return caps;
+
+    cpuid (0x80000001, eax, ebx, ecx, edx);
+
+    if (edx & 0x80000000)
+	caps |= ACCEL_X86_3DNOW;
+
+    if (AMD && (edx & 0x00400000))	// AMD MMX extensions
+	{
+		caps |= ACCEL_X86_MMXEXT;
+	}
+
+    return caps;
+}
+#endif
+
+int cpu_accel (void)
+{
+#ifdef X86_CPU
+    static int got_accel = 0;
+    static int accel;
+
+    if (!got_accel) {
+	got_accel = 1;
+	accel = x86_accel ();
+    }
+
+    return accel;
+#else
+    return 0;
+#endif
+}