| // 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. |
| |
| // This is the main interface for the cast transport sender. It accepts encoded |
| // frames (both audio and video), encrypts their encoded data, packetizes them |
| // and feeds them into a transport (e.g., UDP). |
| |
| // Construction of the Cast Sender and the Cast Transport Sender should be done |
| // in the following order: |
| // 1. Create CastTransportSender. |
| // 2. Create CastSender (accepts CastTransportSender as an input). |
| |
| // Destruction: The CastTransportSender is assumed to be valid as long as the |
| // CastSender is alive. Therefore the CastSender should be destructed before the |
| // CastTransportSender. |
| |
| #ifndef MEDIA_CAST_NET_CAST_TRANSPORT_SENDER_H_ |
| #define MEDIA_CAST_NET_CAST_TRANSPORT_SENDER_H_ |
| |
| #include "base/basictypes.h" |
| #include "base/callback.h" |
| #include "base/single_thread_task_runner.h" |
| #include "base/threading/non_thread_safe.h" |
| #include "base/time/tick_clock.h" |
| #include "media/cast/logging/logging_defines.h" |
| #include "media/cast/net/cast_transport_config.h" |
| #include "media/cast/net/cast_transport_defines.h" |
| #include "media/cast/net/rtcp/receiver_rtcp_event_subscriber.h" |
| #include "media/cast/net/rtcp/rtcp_defines.h" |
| #include "net/base/ip_endpoint.h" |
| |
| namespace base { |
| class DictionaryValue; |
| } // namespace base |
| |
| namespace net { |
| class NetLog; |
| } // namespace net |
| |
| namespace media { |
| namespace cast { |
| |
| // Following the initialization of either audio or video an initialization |
| // status will be sent via this callback. |
| typedef base::Callback<void(CastTransportStatus status)> |
| CastTransportStatusCallback; |
| |
| typedef base::Callback<void(const std::vector<PacketEvent>&, |
| const std::vector<FrameEvent>&)> |
| BulkRawEventsCallback; |
| |
| // The application should only trigger this class from the transport thread. |
| class CastTransportSender : public base::NonThreadSafe { |
| public: |
| static scoped_ptr<CastTransportSender> Create( |
| net::NetLog* net_log, |
| base::TickClock* clock, |
| const net::IPEndPoint& remote_end_point, |
| scoped_ptr<base::DictionaryValue> options, |
| const CastTransportStatusCallback& status_callback, |
| const BulkRawEventsCallback& raw_events_callback, |
| base::TimeDelta raw_events_callback_interval, |
| const scoped_refptr<base::SingleThreadTaskRunner>& transport_task_runner); |
| |
| virtual ~CastTransportSender() {} |
| |
| // Audio/Video initialization. |
| // Encoded frames cannot be transmitted until the relevant initialize method |
| // is called. |
| virtual void InitializeAudio(const CastTransportRtpConfig& config, |
| const RtcpCastMessageCallback& cast_message_cb, |
| const RtcpRttCallback& rtt_cb) = 0; |
| virtual void InitializeVideo(const CastTransportRtpConfig& config, |
| const RtcpCastMessageCallback& cast_message_cb, |
| const RtcpRttCallback& rtt_cb) = 0; |
| |
| // Encrypt, packetize and transmit |frame|. |ssrc| must refer to a |
| // a channel already established with InitializeAudio / InitializeVideo. |
| virtual void InsertFrame(uint32 ssrc, const EncodedFrame& frame) = 0; |
| |
| // Sends a RTCP sender report to the receiver. |
| // |ssrc| is the SSRC for this report. |
| // |current_time| is the current time reported by a tick clock. |
| // |current_time_as_rtp_timestamp| is the corresponding RTP timestamp. |
| virtual void SendSenderReport( |
| uint32 ssrc, |
| base::TimeTicks current_time, |
| uint32 current_time_as_rtp_timestamp) = 0; |
| |
| // Cancels sending packets for the frames in the set. |
| // |ssrc| is the SSRC for the stream. |
| // |frame_ids| contains the IDs of the frames that will be cancelled. |
| virtual void CancelSendingFrames(uint32 ssrc, |
| const std::vector<uint32>& frame_ids) = 0; |
| |
| // Resends a frame or part of a frame to kickstart. This is used when the |
| // stream appears to be stalled. |
| virtual void ResendFrameForKickstart(uint32 ssrc, uint32 frame_id) = 0; |
| |
| // Returns a callback for receiving packets for testing purposes. |
| virtual PacketReceiverCallback PacketReceiverForTesting(); |
| }; |
| |
| } // namespace cast |
| } // namespace media |
| |
| #endif // MEDIA_CAST_NET_CAST_TRANSPORT_SENDER_H_ |