1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
|
// 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_RECEIVER_CAST_RECEIVER_IMPL_H_
#define MEDIA_CAST_RECEIVER_CAST_RECEIVER_IMPL_H_
#include <stdint.h>
#include "base/macros.h"
#include "base/memory/ref_counted.h"
#include "base/memory/scoped_ptr.h"
#include "media/cast/cast_environment.h"
#include "media/cast/cast_receiver.h"
#include "media/cast/net/pacing/paced_sender.h"
#include "media/cast/receiver/frame_receiver.h"
namespace media {
namespace cast {
class AudioDecoder;
class VideoDecoder;
// This is a pure owner class that groups all required receiver-related objects
// together, such as the paced packet sender, audio/video RTP frame receivers,
// and software decoders (created on-demand).
class CastReceiverImpl : public CastReceiver {
public:
CastReceiverImpl(scoped_refptr<CastEnvironment> cast_environment,
const FrameReceiverConfig& audio_config,
const FrameReceiverConfig& video_config,
CastTransportSender* const transport);
~CastReceiverImpl() final;
// CastReceiver implementation.
void ReceivePacket(scoped_ptr<Packet> packet) final;
void RequestDecodedAudioFrame(
const AudioFrameDecodedCallback& callback) final;
void RequestEncodedAudioFrame(
const ReceiveEncodedFrameCallback& callback) final;
void RequestDecodedVideoFrame(
const VideoFrameDecodedCallback& callback) final;
void RequestEncodedVideoFrame(
const ReceiveEncodedFrameCallback& callback) final;
private:
// Feeds an EncodedFrame into |audio_decoder_|. RequestDecodedAudioFrame()
// uses this as a callback for RequestEncodedAudioFrame().
void DecodeEncodedAudioFrame(
const AudioFrameDecodedCallback& callback,
scoped_ptr<EncodedFrame> encoded_frame);
// Feeds an EncodedFrame into |video_decoder_|. RequestDecodedVideoFrame()
// uses this as a callback for RequestEncodedVideoFrame().
void DecodeEncodedVideoFrame(
const VideoFrameDecodedCallback& callback,
scoped_ptr<EncodedFrame> encoded_frame);
// Receives an AudioBus from |audio_decoder_|, logs the event, and passes the
// data on by running the given |callback|. This method is static to ensure
// it can be called after a CastReceiverImpl instance is destroyed.
// DecodeEncodedAudioFrame() uses this as a callback for
// AudioDecoder::DecodeFrame().
static void EmitDecodedAudioFrame(
const scoped_refptr<CastEnvironment>& cast_environment,
const AudioFrameDecodedCallback& callback,
uint32_t frame_id,
uint32_t rtp_timestamp,
const base::TimeTicks& playout_time,
scoped_ptr<AudioBus> audio_bus,
bool is_continuous);
// Receives a VideoFrame from |video_decoder_|, logs the event, and passes the
// data on by running the given |callback|. This method is static to ensure
// it can be called after a CastReceiverImpl instance is destroyed.
// DecodeEncodedVideoFrame() uses this as a callback for
// VideoDecoder::DecodeFrame().
static void EmitDecodedVideoFrame(
const scoped_refptr<CastEnvironment>& cast_environment,
const VideoFrameDecodedCallback& callback,
uint32_t frame_id,
uint32_t rtp_timestamp,
const base::TimeTicks& playout_time,
const scoped_refptr<VideoFrame>& video_frame,
bool is_continuous);
const scoped_refptr<CastEnvironment> cast_environment_;
FrameReceiver audio_receiver_;
FrameReceiver video_receiver_;
// Used by DispatchReceivedPacket() to direct packets to the appropriate frame
// receiver.
const uint32_t ssrc_of_audio_sender_;
const uint32_t ssrc_of_video_sender_;
// Parameters for the decoders that are created on-demand. The values here
// might be nonsense if the client of CastReceiverImpl never intends to use
// the internal software-based decoders.
const int num_audio_channels_;
const int audio_sampling_rate_;
const Codec audio_codec_;
const Codec video_codec_;
// Created on-demand to decode frames from |audio_receiver_| into AudioBuses
// for playback.
scoped_ptr<AudioDecoder> audio_decoder_;
// Created on-demand to decode frames from |video_receiver_| into VideoFrame
// images for playback.
scoped_ptr<VideoDecoder> video_decoder_;
DISALLOW_COPY_AND_ASSIGN(CastReceiverImpl);
};
} // namespace cast
} // namespace media
#endif // MEDIA_CAST_RECEIVER_CAST_RECEIVER_IMPL_
|
