Add --gst-disable-cpu-opt argument.

Original commit message from CVS:
Add --gst-disable-cpu-opt argument.

gst/gst.c

@@ -49,6 +49,8 @@ static gboolean _gst_registry_fixed = FALSE;
 
 static gboolean _gst_use_threads = TRUE;
 
+static gboolean _gst_enable_cpu_opt = TRUE;
+
 static gboolean gst_initialized = FALSE;
 /* this will be set in popt callbacks when a problem has been encountered */
 static gboolean _gst_initialization_failure = FALSE;
@@ -88,6 +90,7 @@ enum {
   ARG_DEBUG_MASK,
   ARG_MASK,
   ARG_MASK_HELP,
+  ARG_DISABLE_CPU_OPT,
   ARG_PLUGIN_SPEW,
   ARG_PLUGIN_PATH,
   ARG_PLUGIN_LOAD,
@@ -111,6 +114,7 @@ static const struct poptOption gstreamer_options[] = {
   {"gst-debug-mask",     NUL, POPT_ARG_INT|POPT_ARGFLAG_STRIP,    NULL, ARG_DEBUG_MASK,     "debugging bitmask", "MASK"},
   {"gst-mask",           NUL, POPT_ARG_INT|POPT_ARGFLAG_STRIP,    NULL, ARG_MASK,           "bitmask for both info and debugging", "MASK"},
   {"gst-mask-help",      NUL, POPT_ARG_NONE|POPT_ARGFLAG_STRIP,   NULL, ARG_MASK_HELP,      "how to set the level of diagnostic output (-mask values)", NULL},
+  {"gst-disable-cpu-opt",NUL, POPT_ARG_NONE|POPT_ARGFLAG_STRIP,	  NULL, ARG_DISABLE_CPU_OPT,"Disable accelerated CPU instructions", NULL},
   {"gst-plugin-spew",    NUL, POPT_ARG_NONE|POPT_ARGFLAG_STRIP,   NULL, ARG_PLUGIN_SPEW,    "enable verbose plugin loading diagnostics", NULL},
   {"gst-plugin-path",    NUL, POPT_ARG_STRING|POPT_ARGFLAG_STRIP, NULL, ARG_PLUGIN_PATH,    "'" G_SEARCHPATH_SEPARATOR_S "'--separated path list for loading plugins", "PATHS"},
   {"gst-plugin-load",    NUL, POPT_ARG_STRING|POPT_ARGFLAG_STRIP, NULL, ARG_PLUGIN_LOAD,    "comma-separated list of plugins to preload in addition to the list stored in env variable GST_PLUGIN_PATH", "PLUGINS"},
@@ -483,7 +487,7 @@ init_post (void)
   /* register core plugins */
   _gst_plugin_register_static (&plugin_desc);
  
-  _gst_cpu_initialize ();
+  _gst_cpu_initialize (_gst_enable_cpu_opt);
   _gst_props_initialize ();
   _gst_caps_initialize ();
   _gst_plugin_initialize ();
@@ -598,6 +602,9 @@ init_popt_callback (poptContext context, enum poptCallbackReason reason,
     case ARG_MASK_HELP:
       gst_mask_help ();
       exit (0);
+    case ARG_DISABLE_CPU_OPT:
+      _gst_enable_cpu_opt = FALSE;
+      break;
     case ARG_PLUGIN_SPEW:
       break;
     case ARG_PLUGIN_PATH:

gst/gstcpu.c

@@ -1,6 +1,7 @@
 /* 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
  *
@@ -25,78 +26,81 @@
 #include "gst_private.h"
 #include "gstcpu.h"
 
-static guint32 _gst_cpu_flags;
+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 *);
-#define gst_cpuid gst_cpuid_i386
 #else
-#define gst_cpuid(o,a,b,c,d) (void)(a);(void)(b);(void)(c);
+#define _gst_cpu_initialize_arch _gst_cpu_initialize_none
 #endif
 
-static gchar *
+gboolean _gst_cpu_initialize_i386 (gulong *flags, GString *featurelist);
-stringcat (gchar * a, gchar * b)
-{
-  gchar *c;
-
-  if (a) {
-    c = g_strconcat (a, b, NULL);
-    g_free (a);
-  }
-  else {
-    c = g_strdup (b);
-  }
-  return c;
-}
-
 
 void
-_gst_cpu_initialize (void)
+_gst_cpu_initialize (gboolean opt)
 {
-  gchar *featurelist = NULL;
+  GString *featurelist = g_string_new ("");
-  gboolean AMD;
+  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 (0, &eax, &ebx, &ecx, &edx);
+  gst_cpuid_i386 (0, &eax, &ebx, &ecx, &edx);
 
   AMD = (ebx == 0x68747541) && (ecx == 0x444d4163) && (edx == 0x69746e65);
 
-  gst_cpuid (1, &eax, &ebx, &ecx, &edx);
+  gst_cpuid_i386 (1, &eax, &ebx, &ecx, &edx);
 
   if (edx & (1 << 23)) {
     _gst_cpu_flags |= GST_CPU_FLAG_MMX;
-    featurelist = stringcat (featurelist, "MMX ");
+    g_string_append (featurelist, "MMX ");
 
     if (edx & (1 << 25)) {
       _gst_cpu_flags |= GST_CPU_FLAG_SSE;
       _gst_cpu_flags |= GST_CPU_FLAG_MMXEXT;
-      featurelist = stringcat (featurelist, "SSE ");
+      g_string_append (featurelist, "SSE ");
     }
 
-    gst_cpuid (0x80000000, &eax, &ebx, &ecx, &edx);
+    gst_cpuid_i386 (0x80000000, &eax, &ebx, &ecx, &edx);
 
     if (eax >= 0x80000001) {
 
-      gst_cpuid (0x80000001, &eax, &ebx, &ecx, &edx);
+      gst_cpuid_i386 (0x80000001, &eax, &ebx, &ecx, &edx);
 
       if (edx & (1 << 31)) {
 	_gst_cpu_flags |= GST_CPU_FLAG_3DNOW;
-	featurelist = stringcat (featurelist, "3DNOW ");
+	g_string_append (featurelist, "3DNOW ");
       }
       if (AMD && (edx & (1 << 22))) {
 	_gst_cpu_flags |= GST_CPU_FLAG_MMXEXT;
-	featurelist = stringcat (featurelist, "MMXEXT ");
+	g_string_append (featurelist, "MMXEXT ");
       }
     }
   }
-
+  *flags = eax;
-  if (!_gst_cpu_flags) {
+  if (_gst_cpu_flags)
-    featurelist = stringcat (featurelist, "NONE");
+    return TRUE;
-  }
+  return FALSE;
-
-  GST_INFO (GST_CAT_GST_INIT, "CPU features: (%08lx) %s", edx, featurelist);
-  g_free (featurelist);
 }
 
 GstCPUFlags

gst/gstcpu.h

@@ -31,7 +31,7 @@ typedef enum {
   GST_CPU_FLAG_3DNOW    = (1<<3)
 } GstCPUFlags;
 
-void 		_gst_cpu_initialize	(void);
+void 		_gst_cpu_initialize	(gboolean useopt);
 
 GstCPUFlags 	gst_cpu_get_flags	(void);