/[svn]/linuxsampler/trunk/src/engines/common/Event.cpp
ViewVC logotype

Diff of /linuxsampler/trunk/src/engines/common/Event.cpp

Parent Directory Parent Directory | Revision Log Revision Log | View Patch Patch

revision 292 by schoenebeck, Mon Oct 25 14:59:18 2004 UTC revision 328 by schoenebeck, Sat Dec 25 21:58:58 2004 UTC
# Line 33  namespace LinuxSampler { Line 33  namespace LinuxSampler {
33      EventGenerator::EventGenerator(uint SampleRate) {      EventGenerator::EventGenerator(uint SampleRate) {
34          uiSampleRate       = SampleRate;          uiSampleRate       = SampleRate;
35          uiSamplesProcessed = 0;          uiSamplesProcessed = 0;
36          FragmentTime.end   = CreateTimeStamp();          FragmentTime.end   = RTMath::CreateTimeStamp();
37      }      }
38    
39      /**      /**
# Line 47  namespace LinuxSampler { Line 47  namespace LinuxSampler {
47      void EventGenerator::UpdateFragmentTime(uint SamplesToProcess) {      void EventGenerator::UpdateFragmentTime(uint SamplesToProcess) {
48          // update time stamp for this audio fragment cycle          // update time stamp for this audio fragment cycle
49          FragmentTime.begin = FragmentTime.end;          FragmentTime.begin = FragmentTime.end;
50          FragmentTime.end   = CreateTimeStamp();          FragmentTime.end   = RTMath::CreateTimeStamp();
51          // recalculate sample ratio for this audio fragment          // recalculate sample ratio for this audio fragment
52          time_stamp_t fragmentDuration = FragmentTime.end - FragmentTime.begin;          time_stamp_t fragmentDuration = FragmentTime.end - FragmentTime.begin;
53          FragmentTime.sample_ratio = (float) uiSamplesProcessed / (float) fragmentDuration;          FragmentTime.sample_ratio = (float) uiSamplesProcessed / (float) fragmentDuration;
# Line 59  namespace LinuxSampler { Line 59  namespace LinuxSampler {
59       * Create a new event with the current time as time stamp.       * Create a new event with the current time as time stamp.
60       */       */
61      Event EventGenerator::CreateEvent() {      Event EventGenerator::CreateEvent() {
62          return Event(this, CreateTimeStamp());          return Event(this, RTMath::CreateTimeStamp());
     }  
   
     /**  
      * Creates a real time stamp for the current moment. Out of efficiency this  
      * is implemented in inline assembly for each CPU independently; we currently  
      * don't use a generic solution for CPUs that are not yet covered by the  
      * assembly code, instead an error message is prompted on compile time, forcing  
      * the user to contact us.  
      */  
     EventGenerator::time_stamp_t EventGenerator::CreateTimeStamp() {  
         #if defined(__i386__) || defined(__x86_64__)  
             uint64_t t;  
             __asm__ __volatile__ ("rdtsc" : "=A" (t));  
             return t >> 8;  
         #elif defined(__ia64__)  
             time_stamp_t t;  
             __asm__ __volatile__ ("mov %0=ar.itc" : "=r"(t));  
             return t;  
         #elif defined(__powerpc__)  
             time_stamp_t t;  
             __asm__ __volatile__ (  
                 "98:    mftb %0\n"  
                 "99:\n"  
                 ".section __ftr_fixup,\"a\"\n"  
                 "       .long %1\n"  
                 "       .long 0\n"  
                 "       .long 98b\n"  
                 "       .long 99b\n"  
                 ".previous"  
                 : "=r" (t) : "i" (0x00000100)  
             );  
             return t;  
         #elif defined(__alpha__)  
             time_stamp_t t;  
             __asm__ __volatile__ ("rpcc %0" : "=r"(t));  
             return t;  
         #else // we don't want to use a slow generic solution  
         #  error "Sorry, LinuxSampler lacks time stamp code for your system."  
         #  error "Please report this error and the CPU you are using to the LinuxSampler developers mailing list!"  
         #endif  
63      }      }
64    
65      /**      /**
Legend:
Removed from v.292  
changed lines
  Added in v.328
  ViewVC Help
Powered by ViewVC