Cast: IPC from browser to renderer to send packet events from transport to cast library.

media/cast/transport/pacing/paced_sender.h

 // 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_TRANSPORT_PACING_PACED_SENDER_H_
 #define MEDIA_CAST_TRANSPORT_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/single_thread_task_runner.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/transport/cast_transport_config.h"
 #include "media/cast/transport/transport/udp_transport.h"
 
 namespace media {
 namespace cast {
+
+class LoggingImpl;
+
 namespace transport {
 
 // We have this pure virtual class to enable mocking.
 class PacedPacketSender {
  public:
   // Inform the pacer / sender of the total number of packets.
   virtual bool SendPackets(const PacketList& packets) = 0;
 
   virtual bool ResendPackets(const PacketList& packets) = 0;
 
   virtual bool SendRtcpPacket(const Packet& packet) = 0;
 
   virtual ~PacedPacketSender() {}
 };
 
 class PacedSender : public PacedPacketSender,
                     public base::NonThreadSafe,
                     public base::SupportsWeakPtr<PacedSender> {
  public:
   // The |external_transport| should only be used by the Cast receiver and for
   // testing.
   PacedSender(
       base::TickClock* clock,
+      LoggingImpl* logging,
       PacketSender* external_transport,
       const scoped_refptr<base::SingleThreadTaskRunner>& transport_task_runner);
 
   virtual ~PacedSender();
 
+  // These must be called before non-RTCP packets are sent.
+  void InitializeAudio(const CastTransportAudioConfig& config);
+  void InitializeVideo(const CastTransportVideoConfig& config);
+
   // PacedPacketSender implementation.
   virtual bool SendPackets(const PacketList& packets) OVERRIDE;
 
   virtual bool ResendPackets(const PacketList& packets) OVERRIDE;
 
   virtual bool SendRtcpPacket(const Packet& packet) OVERRIDE;
 
  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:
   bool SendPacketsToTransport(const PacketList& packets,
-                              PacketList* packets_not_sent);
+                              PacketList* packets_not_sent,
+                              bool retransmit);
 
   // Actually sends the packets to the transport.
   bool TransmitPackets(const PacketList& packets);
   void SendStoredPackets();
   void UpdateBurstSize(size_t num_of_packets);
 
-  // Not owned by this class.
-  base::TickClock* const clock_;
-  PacketSender* transport_;  // Not owned by this class.
+  void LogPacketEvents(const PacketList& packet_list, CastLoggingEvent event);
+  void LogPacketEvent(const Packet& packet, bool retransmit);
+  bool IsAudioPacket(const Packet& packet);
+
+  base::TickClock* const clock_;  // Not owned by this class.
+  LoggingImpl* const logging_;    // Not owned by this class.
+  PacketSender* transport_;       // Not owned by this class.
   scoped_refptr<base::SingleThreadTaskRunner> transport_task_runner_;
+  uint32 audio_ssrc_;
+  uint32 video_ssrc_;
   size_t burst_size_;
   size_t packets_sent_in_burst_;
   base::TimeTicks time_last_process_;
   // Note: We can't combine the |packet_list_| and the |resend_packet_list_|
   // since then we might get reordering of the retransmitted packets.
   PacketList packet_list_;
   PacketList resend_packet_list_;
 
   base::WeakPtrFactory<PacedSender> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(PacedSender);
 };
 
 }  // namespace transport
 }  // namespace cast
 }  // namespace media
 
 #endif  // MEDIA_CAST_TRANSPORT_PACING_PACED_SENDER_H_