Add --cpuid parameter to disable runtime optimizations.

src/config.c

@@ -95,6 +95,7 @@ int config_init(config *cfg)
   cfg->slice_addresses_in_ts[0] = 0;
   
   cfg->threads = 0;
+  cfg->cpuid = 1;
 
   return 1;
 }
@@ -438,6 +439,8 @@ static int config_parse(config *cfg, const char *name, const char *value)
     error = !parse_slice_specification(value, &cfg->slice_count, &cfg->slice_addresses_in_ts);
   else if OPT("threads")
     cfg->threads = atoi(value);
+  else if OPT("cpuid")
+    cfg->cpuid = atoi(value);
   else
     return 0;
 #undef OPT
@@ -492,6 +495,7 @@ int config_read(config *cfg,int argc, char *argv[])
     { "owf",                required_argument, NULL, 0 },
     { "slice-addresses",    required_argument, NULL, 0 },
     { "threads",            required_argument, NULL, 0 },
+    { "cpuid",              required_argument, NULL, 0 },
     {0, 0, 0, 0}
   };
 

src/config.h

@@ -79,6 +79,7 @@ typedef struct
   int32_t* slice_addresses_in_ts;
   
   int32_t threads;
+  int32_t cpuid;
 } config;
 
 /* Function definitions */

src/encmain.c

@@ -79,13 +79,6 @@ int main(int argc, char *argv[])
       
   CHECKPOINTS_INIT();
 
-  //Initialize strategies
-  if (!strategyselector_init()) {
-    fprintf(stderr, "Failed to initialize strategies.\n");
-    return EXIT_FAILURE;
-  }
-    
-
   // Handle configuration
   cfg = config_alloc();
 
@@ -125,6 +118,7 @@ int main(int argc, char *argv[])
             "          --aud                  : Use access unit delimiters\n"
             "          --cqmfile <string>     : Custom Quantization Matrices from a file\n"
             "          --debug <string>       : Output encoders reconstruction.\n"
+            "          --cpuid <integer>      : Disable runtime cpu optimizations with value 0.\n"
             "\n"
             "  Video Usability Information:\n"
             "          --sar <width:height>   : Specify Sample Aspect Ratio\n"
@@ -202,6 +196,12 @@ int main(int argc, char *argv[])
     goto exit_failure;
   }
 
+  //Initialize strategies
+  if (!strategyselector_init(cfg->cpuid)) {
+    fprintf(stderr, "Failed to initialize strategies.\n");
+    goto exit_failure;
+  }
+
   // Check if the input file name is a dash, this means stdin
   if (!strcmp(cfg->input, "-")) {
     input = stdin;

src/strategyselector.c

@@ -32,13 +32,13 @@
 
 hardware_flags g_hardware_flags;
 
-static void set_hardware_flags();
+static void set_hardware_flags(int32_t cpuid);
 static void* strategyselector_choose_for(const strategy_list * const strategies, const char * const strategy_type);
 
 //Strategies to include (add new file here)
 
 //Returns 1 if successful
-int strategyselector_init() {
+int strategyselector_init(int32_t cpuid) {
   const strategy_to_select *cur_strategy_to_select = strategies_to_select;
   strategy_list strategies;
   
@@ -46,7 +46,7 @@ int strategyselector_init() {
   strategies.count = 0;
   strategies.strategies = NULL;
   
-  set_hardware_flags();
+  set_hardware_flags(cpuid);
   
   //Add new register function here
   if (!strategy_register_picture(&strategies)) {
@@ -232,7 +232,7 @@ out_close:
 }
 #endif //COMPILE_POWERPC
 
-static void set_hardware_flags() {
+static void set_hardware_flags(int32_t cpuid) {
   memset(&g_hardware_flags, 0, sizeof(g_hardware_flags));
   
   g_hardware_flags.arm = COMPILE_ARM;
@@ -240,7 +240,7 @@ static void set_hardware_flags() {
   g_hardware_flags.powerpc = COMPILE_POWERPC;
 
 #if COMPILE_INTEL
-  {
+  if (cpuid) {
     unsigned int eax = 0, ebx = 0, ecx = 0, edx =0;
     /* CPU feature bits */
     enum { BIT_SSE3 = 0, BIT_SSSE3 = 9, BIT_SSE41 = 19, BIT_SSE42 = 20,
@@ -290,7 +290,7 @@ static void set_hardware_flags() {
       get_cpuid(7, &eax, &ebx, &ecx, &edx);
       if (ebx & (1 << 5))  g_hardware_flags.intel_flags.avx2 = 1;
     }
-
+  }
 
   fprintf(stderr, "Compiled: INTEL, flags:");
 #if COMPILE_INTEL_MMX
@@ -320,7 +320,7 @@ static void set_hardware_flags() {
 #if COMPILE_INTEL_AVX2
   fprintf(stderr, " AVX2");
 #endif
-    fprintf(stderr, "\nRun on  : INTEL, flags:");
+  fprintf(stderr, "\nDetected: INTEL, flags:");
   if (g_hardware_flags.intel_flags.mmx) fprintf(stderr, " MMX");
   if (g_hardware_flags.intel_flags.sse) fprintf(stderr, " SSE");
   if (g_hardware_flags.intel_flags.sse2) fprintf(stderr, " SSE2");
@@ -331,17 +331,19 @@ static void set_hardware_flags() {
   if (g_hardware_flags.intel_flags.avx) fprintf(stderr, " AVX");
   if (g_hardware_flags.intel_flags.avx2) fprintf(stderr, " AVX2");
   fprintf(stderr, "\n");
-  }
+  
 #endif //COMPILE_INTEL
 
 #if COMPILE_POWERPC
+  if (cpuid) {
     g_hardware_flags.powerpc_flags.altivec = altivec_available();
+  }
   
   fprintf(stderr, "Compiled: PowerPC, flags:");
 #if COMPILE_POWERPC_ALTIVEC
   fprintf(stderr, " AltiVec");
 #endif
-  fprintf(stderr, "\nRun on  : PowerPC, flags:");
+  fprintf(stderr, "\nDetected: PowerPC, flags:");
   if (g_hardware_flags.powerpc_flags.altivec) fprintf(stderr, " AltiVec");
   fprintf(stderr, "\n");
 #endif

src/strategyselector.h

@@ -19,6 +19,8 @@
  * along with Kvazaar.  If not, see <http://www.gnu.org/licenses/>.
  ****************************************************************************/
 
+#include "global.h"
+
 #if defined(_DEBUG) && !defined(DEBUG_STRATEGYSELECTOR)
 # define DEBUG_STRATEGYSELECTOR
 #endif
@@ -136,7 +138,7 @@ typedef struct {
 extern hardware_flags g_hardware_flags;
 
 
-int strategyselector_init();
+int strategyselector_init(int32_t cpuid);
 void strategyselector_free();
 int strategyselector_register(void *opaque, const char *type, const char *strategy_name, int priority, void *fptr);