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// 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_RTCP_RTCP_H_
#define MEDIA_CAST_RTCP_RTCP_H_
#include <list>
#include <map>
#include <queue>
#include <set>
#include <string>
#include "base/basictypes.h"
#include "base/memory/scoped_ptr.h"
#include "base/time/tick_clock.h"
#include "base/time/time.h"
#include "media/cast/cast_config.h"
#include "media/cast/cast_defines.h"
#include "media/cast/cast_environment.h"
#include "media/cast/rtcp/rtcp_defines.h"
namespace media {
namespace cast {
class LocalRtcpReceiverFeedback;
class LocalRtcpRttFeedback;
class PacedPacketSender;
class RtcpReceiver;
class RtcpSender;
typedef std::pair<uint32, base::TimeTicks> RtcpSendTimePair;
typedef std::map<uint32, base::TimeTicks> RtcpSendTimeMap;
typedef std::queue<RtcpSendTimePair> RtcpSendTimeQueue;
class RtcpSenderFeedback {
public:
virtual void OnReceivedCastFeedback(const RtcpCastMessage& cast_feedback) = 0;
virtual ~RtcpSenderFeedback() {}
};
class RtpSenderStatistics {
public:
virtual void GetStatistics(const base::TimeTicks& now,
RtcpSenderInfo* sender_info) = 0;
virtual ~RtpSenderStatistics() {}
};
class RtpReceiverStatistics {
public:
virtual void GetStatistics(uint8* fraction_lost,
uint32* cumulative_lost, // 24 bits valid.
uint32* extended_high_sequence_number,
uint32* jitter) = 0;
virtual ~RtpReceiverStatistics() {}
};
class Rtcp {
public:
Rtcp(scoped_refptr<CastEnvironment> cast_environment,
RtcpSenderFeedback* sender_feedback,
PacedPacketSender* paced_packet_sender,
RtpSenderStatistics* rtp_sender_statistics,
RtpReceiverStatistics* rtp_receiver_statistics,
RtcpMode rtcp_mode,
const base::TimeDelta& rtcp_interval,
uint32 local_ssrc,
uint32 remote_ssrc,
const std::string& c_name);
virtual ~Rtcp();
static bool IsRtcpPacket(const uint8* rtcp_buffer, size_t length);
static uint32 GetSsrcOfSender(const uint8* rtcp_buffer, size_t length);
base::TimeTicks TimeToSendNextRtcpReport();
// |sender_log_message| is optional; without it no log messages will be
// attached to the RTCP report; instead a normal RTCP send report will be
// sent.
// Additionally if all messages in |sender_log_message| does
// not fit in the packet the |sender_log_message| will contain the remaining
// unsent messages.
void SendRtcpFromRtpSender(RtcpSenderLogMessage* sender_log_message);
// |cast_message| and |receiver_log| is optional; if |cast_message| is
// provided the RTCP receiver report will append a Cast message containing
// Acks and Nacks; if |receiver_log| is provided the RTCP receiver report will
// append the log messages. If no argument is set a normal RTCP receiver
// report will be sent. Additionally if all messages in |receiver_log| does
// not fit in the packet the |receiver_log| will contain the remaining unsent
// messages.
void SendRtcpFromRtpReceiver(const RtcpCastMessage* cast_message,
RtcpReceiverLogMessage* receiver_log);
void IncomingRtcpPacket(const uint8* rtcp_buffer, size_t length);
bool Rtt(base::TimeDelta* rtt, base::TimeDelta* avg_rtt,
base::TimeDelta* min_rtt, base::TimeDelta* max_rtt) const;
bool RtpTimestampInSenderTime(int frequency,
uint32 rtp_timestamp,
base::TimeTicks* rtp_timestamp_in_ticks) const;
protected:
int CheckForWrapAround(uint32 new_timestamp,
uint32 old_timestamp) const;
void OnReceivedLipSyncInfo(uint32 rtp_timestamp,
uint32 ntp_seconds,
uint32 ntp_fraction);
private:
friend class LocalRtcpRttFeedback;
friend class LocalRtcpReceiverFeedback;
void SendRtcp(const base::TimeTicks& now,
uint32 packet_type_flags,
uint32 media_ssrc,
const RtcpCastMessage* cast_message);
void OnReceivedNtp(uint32 ntp_seconds, uint32 ntp_fraction);
void OnReceivedDelaySinceLastReport(uint32 receivers_ssrc,
uint32 last_report,
uint32 delay_since_last_report);
void OnReceivedSendReportRequest();
void UpdateRtt(const base::TimeDelta& sender_delay,
const base::TimeDelta& receiver_delay);
void UpdateNextTimeToSendRtcp();
void SaveLastSentNtpTime(const base::TimeTicks& now, uint32 last_ntp_seconds,
uint32 last_ntp_fraction);
scoped_refptr<CastEnvironment> cast_environment_;
const base::TimeDelta rtcp_interval_;
const RtcpMode rtcp_mode_;
const uint32 local_ssrc_;
const uint32 remote_ssrc_;
// Not owned by this class.
RtpSenderStatistics* const rtp_sender_statistics_;
RtpReceiverStatistics* const rtp_receiver_statistics_;
scoped_ptr<LocalRtcpRttFeedback> rtt_feedback_;
scoped_ptr<LocalRtcpReceiverFeedback> receiver_feedback_;
scoped_ptr<RtcpSender> rtcp_sender_;
scoped_ptr<RtcpReceiver> rtcp_receiver_;
base::TimeTicks next_time_to_send_rtcp_;
RtcpSendTimeMap last_reports_sent_map_;
RtcpSendTimeQueue last_reports_sent_queue_;
base::TimeTicks time_last_report_received_;
uint32 last_report_received_;
uint32 last_received_rtp_timestamp_;
uint32 last_received_ntp_seconds_;
uint32 last_received_ntp_fraction_;
base::TimeDelta rtt_;
base::TimeDelta min_rtt_;
base::TimeDelta max_rtt_;
int number_of_rtt_in_avg_;
float avg_rtt_ms_;
DISALLOW_COPY_AND_ASSIGN(Rtcp);
};
} // namespace cast
} // namespace media
#endif // MEDIA_CAST_RTCP_RTCP_H_
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