Adding a mockable wrapper class for TickTime in VCM

The class is called TickTimeInterface, with a fake implementation in FakeTickTime.

Review URL: http://webrtc-codereview.appspot.com/323012

git-svn-id: http://webrtc.googlecode.com/svn/trunk@1183 4adac7df-926f-26a2-2b94-8c16560cd09d

src/modules/video_coding/main/source/mock/fake_tick_time_interface.h

@@ -0,0 +1,42 @@
+/*
+ *  Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "modules/video_coding/main/source/tick_time_wrapper.h"
+
+#ifndef WEBRTC_MODULES_VIDEO_CODING_MAIN_SOURCE_MOCK_FAKE_TICK_TIME_WRAPPER_H_
+#define WEBRTC_MODULES_VIDEO_CODING_MAIN_SOURCE_MOCK_FAKE_TICK_TIME_WRAPPER_H_
+
+namespace webrtc {
+
+class FakeTickTime : public TickTimeInterface
+{
+ public:
+  FakeTickTime(int64_t start_time_ms)
+    : fake_now_(TickTime::Now()) {
+    fake_now_ += (MillisecondsToTicks(start_time_ms) - fake_now_.Ticks());
+  }
+  virtual TickTime Now() const { return fake_now_; }
+  virtual int64_t MillisecondTimestamp() const {
+    return TicksToMilliseconds(Now().Ticks());
+  }
+  virtual int64_t MicrosecondTimestamp() const {
+    return 1000 * TicksToMilliseconds(Now().Ticks());
+  }
+  virtual void IncrementDebugClock(int64_t increase_ms) {
+    fake_now_ += MillisecondsToTicks(increase_ms);
+  }
+
+ private:
+  TickTime fake_now_;
+};
+
+}  // namespace
+
+#endif  // WEBRTC_MODULES_VIDEO_CODING_MAIN_SOURCE_MOCK_FAKE_TICK_TIME_WRAPPER_H_

src/modules/video_coding/main/source/tick_time_interface.h

@@ -0,0 +1,36 @@
+/*
+ *  Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "system_wrappers/interface/tick_util.h"
+
+#ifndef WEBRTC_MODULES_VIDEO_CODING_MAIN_SOURCE_TICK_TIME_WRAPPER_H_
+#define WEBRTC_MODULES_VIDEO_CODING_MAIN_SOURCE_TICK_TIME_WRAPPER_H_
+
+namespace webrtc {
+
+class TickTimeInterface : public TickTime {
+ public:
+  // Current time in the tick domain.
+  virtual TickTime Now() const { return TickTime::Now(); }
+
+  // Now in the time domain in ms.
+  virtual int64_t MillisecondTimestamp() const {
+    return TickTime::MillisecondTimestamp();
+  }
+
+  // Now in the time domain in us.
+  virtual int64_t MicrosecondTimestamp() const {
+    return TickTime::MicrosecondTimestamp();
+  }
+};
+
+}  // namespace
+
+#endif  // WEBRTC_MODULES_VIDEO_CODING_MAIN_SOURCE_TICK_TIME_WRAPPER_H_

src/modules/video_coding/main/source/video_coding.gypi

@@ -64,6 +64,7 @@
         'rtt_filter.h',
         'session_info.h',
         'tick_time.h',
+        'tick_time_interface.h',
         'timestamp_extrapolator.h',
         'timestamp_map.h',
         'timing.h',