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// Copyright 2014 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_NET_CAST_TRANSPORT_IMPL_H_
#define MEDIA_CAST_NET_CAST_TRANSPORT_IMPL_H_
#include "base/callback.h"
#include "base/memory/ref_counted.h"
#include "base/memory/scoped_ptr.h"
#include "base/time/tick_clock.h"
#include "base/time/time.h"
#include "base/timer/timer.h"
#include "media/cast/common/transport_encryption_handler.h"
#include "media/cast/logging/logging_defines.h"
#include "media/cast/logging/simple_event_subscriber.h"
#include "media/cast/net/cast_transport_config.h"
#include "media/cast/net/cast_transport_sender.h"
#include "media/cast/net/pacing/paced_sender.h"
#include "media/cast/net/rtcp/rtcp_builder.h"
#include "media/cast/net/rtp/rtp_sender.h"
namespace media {
namespace cast {
class UdpTransport;
class CastTransportSenderImpl : public CastTransportSender {
public:
// external_transport is only used for testing.
// Note that SetPacketReceiver does not work if an external
// transport is provided.
// |raw_events_callback|: Raw events will be returned on this callback
// which will be invoked every |raw_events_callback_interval|.
// This can be a null callback, i.e. if user is not interested in raw events.
// |raw_events_callback_interval|: This can be |base::TimeDelta()| if
// |raw_events_callback| is a null callback.
CastTransportSenderImpl(
net::NetLog* net_log,
base::TickClock* clock,
const net::IPEndPoint& remote_end_point,
const CastTransportStatusCallback& status_callback,
const BulkRawEventsCallback& raw_events_callback,
base::TimeDelta raw_events_callback_interval,
const scoped_refptr<base::SingleThreadTaskRunner>& transport_task_runner,
PacketSender* external_transport);
virtual ~CastTransportSenderImpl();
virtual void InitializeAudio(const CastTransportRtpConfig& config) OVERRIDE;
virtual void InitializeVideo(const CastTransportRtpConfig& config) OVERRIDE;
// CastTransportSender implementation.
virtual void SetPacketReceiver(const PacketReceiverCallback& packet_receiver)
OVERRIDE;
virtual void InsertCodedAudioFrame(const EncodedFrame& audio_frame) OVERRIDE;
virtual void InsertCodedVideoFrame(const EncodedFrame& video_frame) OVERRIDE;
virtual void SendRtcpFromRtpSender(uint32 packet_type_flags,
uint32 ntp_seconds,
uint32 ntp_fraction,
uint32 rtp_timestamp,
const RtcpDlrrReportBlock& dlrr,
uint32 sending_ssrc,
const std::string& c_name) OVERRIDE;
virtual void ResendPackets(bool is_audio,
const MissingFramesAndPacketsMap& missing_packets,
bool cancel_rtx_if_not_in_list,
base::TimeDelta dedupe_window)
OVERRIDE;
private:
// If |raw_events_callback_| is non-null, calls it with events collected
// by |event_subscriber_| since last call.
void SendRawEvents();
base::TickClock* clock_; // Not owned by this class.
CastTransportStatusCallback status_callback_;
scoped_refptr<base::SingleThreadTaskRunner> transport_task_runner_;
scoped_ptr<UdpTransport> transport_;
LoggingImpl logging_;
PacedSender pacer_;
RtcpBuilder rtcp_builder_;
scoped_ptr<RtpSender> audio_sender_;
scoped_ptr<RtpSender> video_sender_;
// Encrypts data in EncodedFrames before they are sent. Note that it's
// important for the encryption to happen here, in code that would execute in
// the main browser process, for security reasons. This helps to mitigate
// the damage that could be caused by a compromised renderer process.
TransportEncryptionHandler audio_encryptor_;
TransportEncryptionHandler video_encryptor_;
// This is non-null iff |raw_events_callback_| is non-null.
scoped_ptr<SimpleEventSubscriber> event_subscriber_;
base::RepeatingTimer<CastTransportSenderImpl> raw_events_timer_;
BulkRawEventsCallback raw_events_callback_;
DISALLOW_COPY_AND_ASSIGN(CastTransportSenderImpl);
};
} // namespace cast
} // namespace media
#endif // MEDIA_CAST_NET_CAST_TRANSPORT_IMPL_H_
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