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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_PACING_PACED_SENDER_H_
#define MEDIA_CAST_PACING_PACED_SENDER_H_
#include <list>
#include <vector>
#include "base/basictypes.h"
#include "base/memory/scoped_ptr.h"
#include "base/memory/weak_ptr.h"
#include "base/threading/non_thread_safe.h"
#include "base/time/default_tick_clock.h"
#include "base/time/tick_clock.h"
#include "base/time/time.h"
#include "media/cast/cast_config.h"
#include "media/cast/cast_thread.h"
namespace media {
namespace cast {
class PacedPacketSender {
public:
// Inform the pacer / sender of the total number of packets.
virtual bool SendPacket(const std::vector<uint8>& packet,
int num_of_packets) = 0;
virtual bool ResendPacket(const std::vector<uint8>& packet,
int num_of_packets) = 0;
virtual bool SendRtcpPacket(const std::vector<uint8>& packet) = 0;
virtual ~PacedPacketSender() {}
};
class PacedSender : public PacedPacketSender,
public base::NonThreadSafe,
public base::SupportsWeakPtr<PacedSender> {
public:
PacedSender(scoped_refptr<CastThread> cast_thread, PacketSender* transport);
virtual ~PacedSender();
virtual bool SendPacket(const std::vector<uint8>& packet,
int num_of_packets) OVERRIDE;
virtual bool ResendPacket(const std::vector<uint8>& packet,
int num_of_packets) OVERRIDE;
virtual bool SendRtcpPacket(const std::vector<uint8>& packet) OVERRIDE;
void set_clock(base::TickClock* clock) {
clock_ = clock;
}
protected:
// Schedule a delayed task on the main cast thread when it's time to send the
// next packet burst.
void ScheduleNextSend();
// Process any pending packets in the queue(s).
void SendNextPacketBurst();
private:
void SendStoredPacket();
void UpdateBurstSize(int num_of_packets);
typedef std::list<std::vector<uint8> > PacketList;
scoped_refptr<CastThread> cast_thread_;
int burst_size_;
int packets_sent_in_burst_;
base::TimeTicks time_last_process_;
PacketList packet_list_;
PacketList resend_packet_list_;
PacketSender* transport_;
base::DefaultTickClock default_tick_clock_;
base::TickClock* clock_;
base::WeakPtrFactory<PacedSender> weak_factory_;
DISALLOW_COPY_AND_ASSIGN(PacedSender);
};
} // namespace cast
} // namespace media
#endif // MEDIA_CAST_PACING_PACED_SENDER_H_
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