1 files changed, 54 insertions, 0 deletions
diff --git a/chromium/media/cast/congestion_control/congestion_control.h b/chromium/media/cast/congestion_control/congestion_control.h
new file mode 100644
index 00000000000..f1b9b280dcc
--- /dev/null
+++ b/chromium/media/cast/congestion_control/congestion_control.h
@@ -0,0 +1,54 @@
+// Copyright 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef MEDIA_CAST_CONGESTION_CONTROL_CONGESTION_CONTROL_H_
+#define MEDIA_CAST_CONGESTION_CONTROL_CONGESTION_CONTROL_H_
+
+#include "base/basictypes.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/time/default_tick_clock.h"
+#include "base/time/tick_clock.h"
+#include "base/time/time.h"
+
+namespace media {
+namespace cast {
+
+class CongestionControl {
+ public:
+  CongestionControl(float congestion_control_back_off,
+                    uint32 max_bitrate_configured,
+                    uint32 min_bitrate_configured,
+                    uint32 start_bitrate);
+
+  virtual ~CongestionControl() {}
+
+  // Don't call OnAck if the same message contain a NACK.
+  // Returns true if the bitrate have changed.
+  bool OnAck(base::TimeDelta rtt_ms, uint32* new_bitrate);
+
+  // Returns true if the bitrate have changed.
+  bool OnNack(base::TimeDelta rtt_ms, uint32* new_bitrate);
+
+  void set_clock(base::TickClock* clock) {
+    clock_ = clock;
+  }
+
+ private:
+  const float congestion_control_back_off_;
+  const uint32 max_bitrate_configured_;
+  const uint32 min_bitrate_configured_;
+  uint32 bitrate_;
+  base::TimeTicks time_last_increase_;
+  base::TimeTicks time_last_decrease_;
+
+  scoped_ptr<base::TickClock> default_tick_clock_;
+  base::TickClock* clock_;
+
+  DISALLOW_COPY_AND_ASSIGN(CongestionControl);
+};
+
+}  // namespace cast
+}  // namespace media
+
+#endif // MEDIA_CAST_CONGESTION_CONTROL_CONGESTION_CONTROL_H_