1 // Copyright 2014 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
5 #ifndef MEDIA_CAST_RECEIVER_CAST_RECEIVER_IMPL_H_
6 #define MEDIA_CAST_RECEIVER_CAST_RECEIVER_IMPL_H_
8 #include "base/memory/ref_counted.h"
9 #include "base/memory/scoped_ptr.h"
10 #include "media/cast/cast_config.h"
11 #include "media/cast/cast_environment.h"
12 #include "media/cast/cast_receiver.h"
13 #include "media/cast/net/pacing/paced_sender.h"
14 #include "media/cast/receiver/frame_receiver.h"
22 // This is a pure owner class that groups all required receiver-related objects
23 // together, such as the paced packet sender, audio/video RTP frame receivers,
24 // and software decoders (created on-demand).
25 class CastReceiverImpl : public CastReceiver {
27 CastReceiverImpl(scoped_refptr<CastEnvironment> cast_environment,
28 const FrameReceiverConfig& audio_config,
29 const FrameReceiverConfig& video_config,
30 PacketSender* const packet_sender);
32 virtual ~CastReceiverImpl();
34 // CastReceiver implementation.
35 virtual PacketReceiverCallback packet_receiver() OVERRIDE;
36 virtual void RequestDecodedAudioFrame(
37 const AudioFrameDecodedCallback& callback) OVERRIDE;
38 virtual void RequestEncodedAudioFrame(
39 const ReceiveEncodedFrameCallback& callback) OVERRIDE;
40 virtual void RequestDecodedVideoFrame(
41 const VideoFrameDecodedCallback& callback) OVERRIDE;
42 virtual void RequestEncodedVideoFrame(
43 const ReceiveEncodedFrameCallback& callback) OVERRIDE;
46 // Forwards |packet| to a specific RTP frame receiver, or drops it if SSRC
47 // does not map to one of the receivers.
48 void DispatchReceivedPacket(scoped_ptr<Packet> packet);
50 // Feeds an EncodedFrame into |audio_decoder_|. RequestDecodedAudioFrame()
51 // uses this as a callback for RequestEncodedAudioFrame().
52 void DecodeEncodedAudioFrame(
53 const AudioFrameDecodedCallback& callback,
54 scoped_ptr<EncodedFrame> encoded_frame);
56 // Feeds an EncodedFrame into |video_decoder_|. RequestDecodedVideoFrame()
57 // uses this as a callback for RequestEncodedVideoFrame().
58 void DecodeEncodedVideoFrame(
59 const VideoFrameDecodedCallback& callback,
60 scoped_ptr<EncodedFrame> encoded_frame);
62 // Receives an AudioBus from |audio_decoder_|, logs the event, and passes the
63 // data on by running the given |callback|. This method is static to ensure
64 // it can be called after a CastReceiverImpl instance is destroyed.
65 // DecodeEncodedAudioFrame() uses this as a callback for
66 // AudioDecoder::DecodeFrame().
67 static void EmitDecodedAudioFrame(
68 const scoped_refptr<CastEnvironment>& cast_environment,
69 const AudioFrameDecodedCallback& callback,
72 const base::TimeTicks& playout_time,
73 scoped_ptr<AudioBus> audio_bus,
76 // Receives a VideoFrame from |video_decoder_|, logs the event, and passes the
77 // data on by running the given |callback|. This method is static to ensure
78 // it can be called after a CastReceiverImpl instance is destroyed.
79 // DecodeEncodedVideoFrame() uses this as a callback for
80 // VideoDecoder::DecodeFrame().
81 static void EmitDecodedVideoFrame(
82 const scoped_refptr<CastEnvironment>& cast_environment,
83 const VideoFrameDecodedCallback& callback,
86 const base::TimeTicks& playout_time,
87 const scoped_refptr<VideoFrame>& video_frame,
90 const scoped_refptr<CastEnvironment> cast_environment_;
92 FrameReceiver audio_receiver_;
93 FrameReceiver video_receiver_;
95 // Used by DispatchReceivedPacket() to direct packets to the appropriate frame
97 const uint32 ssrc_of_audio_sender_;
98 const uint32 ssrc_of_video_sender_;
100 // Parameters for the decoders that are created on-demand. The values here
101 // might be nonsense if the client of CastReceiverImpl never intends to use
102 // the internal software-based decoders.
103 const int num_audio_channels_;
104 const int audio_sampling_rate_;
105 const Codec audio_codec_;
106 const Codec video_codec_;
108 // Created on-demand to decode frames from |audio_receiver_| into AudioBuses
110 scoped_ptr<AudioDecoder> audio_decoder_;
112 // Created on-demand to decode frames from |video_receiver_| into VideoFrame
113 // images for playback.
114 scoped_ptr<VideoDecoder> video_decoder_;
116 DISALLOW_COPY_AND_ASSIGN(CastReceiverImpl);
122 #endif // MEDIA_CAST_RECEIVER_CAST_RECEIVER_IMPL_