add implementation for kaldi io (by ymz)

1 files changed, 83 insertions, 0 deletions

diff --git a/kaldi_io/src/kaldi/base/timer.h b/kaldi_io/src/kaldi/base/timer.h
new file mode 100644
index 0000000..d93a461
--- /dev/null
+++ b/kaldi_io/src/kaldi/base/timer.h
@@ -0,0 +1,83 @@
+// base/timer.h
+
+// Copyright 2009-2011  Ondrej Glembek;  Microsoft Corporation
+
+// See ../../COPYING for clarification regarding multiple authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+
+//  http://www.apache.org/licenses/LICENSE-2.0
+
+// THIS CODE IS PROVIDED *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
+// WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,
+// MERCHANTABLITY OR NON-INFRINGEMENT.
+// See the Apache 2 License for the specific language governing permissions and
+// limitations under the License.
+#ifndef KALDI_BASE_TIMER_H_
+#define KALDI_BASE_TIMER_H_
+
+#include "base/kaldi-utils.h"
+// Note: Sleep(float secs) is included in base/kaldi-utils.h.
+
+
+#if defined(_MSC_VER) || defined(MINGW)
+
+namespace kaldi
+{
+
+class Timer {
+ public:
+  Timer() { Reset(); }
+  void Reset() {
+    QueryPerformanceCounter(&time_start_);
+  }
+  double Elapsed() {
+    LARGE_INTEGER time_end;
+    LARGE_INTEGER freq;
+    QueryPerformanceCounter(&time_end);
+    if (QueryPerformanceFrequency(&freq) == 0) return 0.0;  // Hardware does not support this.
+    return ((double)time_end.QuadPart - (double)time_start_.QuadPart) /
+        ((double)freq.QuadPart);
+  }
+ private:
+  LARGE_INTEGER time_start_;
+};
+}
+
+#else
+
+# include <sys/time.h>
+# include <unistd.h>
+namespace kaldi
+{
+class Timer
+{
+ public:
+  Timer() { Reset(); }
+
+  void Reset() { gettimeofday(&this->time_start_, &time_zone_); }
+
+  /// Returns time in seconds.
+  double Elapsed() {
+    struct timeval time_end;
+    gettimeofday(&time_end, &time_zone_);
+    double t1, t2;
+    t1 =  (double)time_start_.tv_sec +
+        (double)time_start_.tv_usec/(1000*1000);
+    t2 =  (double)time_end.tv_sec + (double)time_end.tv_usec/(1000*1000);
+    return t2-t1;
+  }
+
+ private:
+  struct timeval time_start_;
+  struct timezone time_zone_;
+};
+}
+
+#endif
+
+
+#endif