media/cast/transport/transport_audio_sender.h

// 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_TRANSPORT_TRANSPORT_AUDIO_SENDER_H_
#define MEDIA_CAST_TRANSPORT_TRANSPORT_AUDIO_SENDER_H_

#include "base/callback.h"
#include "base/memory/ref_counted.h"
#include "base/memory/scoped_ptr.h"
#include "base/threading/non_thread_safe.h"
#include "media/cast/transport/rtp_sender/rtp_sender.h"
#include "media/cast/transport/utility/transport_encryption_handler.h"

namespace media {
namespace cast {

namespace transport {

class PacedSender;

// It's only called from the main cast transport thread.
class TransportAudioSender : public base::NonThreadSafe {
 public:
  TransportAudioSender(
      const CastTransportAudioConfig& config,
      base::TickClock* clock,
      const scoped_refptr<base::SingleThreadTaskRunner>& transport_task_runner,
      PacedSender* const paced_packet_sender);

  virtual ~TransportAudioSender();

  // Handles the encoded audio frames to be processed.
  // Frames will be encrypted, packetized and transmitted to the network.
  void SendFrame(const EncodedFrame& audio_frame);

  // Retransmision request.
  void ResendPackets(
      const MissingFramesAndPacketsMap& missing_frames_and_packets);

  size_t send_packet_count() const { return rtp_sender_.send_packet_count(); }
  size_t send_octet_count() const { return rtp_sender_.send_octet_count(); }
  uint32 ssrc() const { return rtp_sender_.ssrc(); }
  bool initialized() const { return initialized_; }

 private:
  friend class LocalRtcpAudioSenderFeedback;

  // Caller must allocate the destination |encrypted_frame|. The data member
  // will be resized to hold the encrypted size.
  bool EncryptAudioFrame(const EncodedFrame& audio_frame,
                         EncodedFrame* encrypted_frame);

  RtpSender rtp_sender_;
  TransportEncryptionHandler encryptor_;
  bool initialized_;

  DISALLOW_IMPLICIT_CONSTRUCTORS(TransportAudioSender);
};

}  // namespace transport
}  // namespace cast
}  // namespace media

#endif  // MEDIA_CAST_TRANSPORT_TRANSPORT_AUDIO_SENDER_H_