/*
 *  Copyright (c) 2012 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.
 */

#ifndef WEBRTC_MODULES_RTP_RTCP_SOURCE_BITRATE_H_
#define WEBRTC_MODULES_RTP_RTCP_SOURCE_BITRATE_H_

#include "typedefs.h"
#include "rtp_rtcp_config.h"     // misc. defines (e.g. MAX_PACKET_LENGTH)
#include "common_types.h"            // Transport
#include <stdio.h>
#include <list>

namespace webrtc {
class RtpRtcpClock;

class Bitrate
{
public:
    Bitrate(RtpRtcpClock* clock);

    // calculate rates
    void Process();

    // update with a packet
    void Update(const WebRtc_Word32 bytes);

    // packet rate last second, updated roughly every 100 ms
    WebRtc_UWord32 PacketRate() const;

    // bitrate last second, updated roughly every 100 ms
    WebRtc_UWord32 BitrateLast() const;

    // bitrate last second, updated now
    WebRtc_UWord32 BitrateNow() const;

protected:
  RtpRtcpClock& _clock;

private:
  WebRtc_UWord32 _packetRate;
  WebRtc_UWord32 _bitrate;
  WebRtc_UWord8 _bitrateNextIdx;
  WebRtc_Word64 _packetRateArray[10];
  WebRtc_Word64 _bitrateArray[10];
  WebRtc_Word64 _bitrateDiffMS[10];
  WebRtc_Word64 _timeLastRateUpdate;
  WebRtc_UWord32 _bytesCount;
  WebRtc_UWord32 _packetCount;
};

}  // namespace webrtc

#endif // WEBRTC_MODULES_RTP_RTCP_SOURCE_BITRATE_H_