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
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
|
/*
* Copyright (C) 2011 Ericsson AB. All rights reserved.
* Copyright (C) 2012 Google Inc. All rights reserved.
* Copyright (C) 2013 Apple Inc. All rights reserved.
* Copyright (C) 2013 Nokia Corporation and/or its subsidiary(-ies).
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name of Ericsson nor the names of its contributors
* may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef RealtimeMediaSource_h
#define RealtimeMediaSource_h
#if ENABLE(MEDIA_STREAM)
#include "AudioSourceProvider.h"
#include "Image.h"
#include "MediaConstraints.h"
#include "MediaSample.h"
#include "PlatformLayer.h"
#include "RealtimeMediaSourceCapabilities.h"
#include <wtf/RefCounted.h>
#include <wtf/Vector.h>
#include <wtf/WeakPtr.h>
#include <wtf/text/WTFString.h>
namespace WTF {
class MediaTime;
}
namespace WebCore {
class AudioStreamDescription;
class FloatRect;
class GraphicsContext;
class MediaStreamPrivate;
class PlatformAudioData;
class RealtimeMediaSourceSettings;
class RealtimeMediaSource : public RefCounted<RealtimeMediaSource> {
public:
class Observer {
public:
virtual ~Observer() { }
// Source state changes.
virtual void sourceStopped() { }
virtual void sourceMutedChanged() { }
virtual void sourceEnabledChanged() { }
virtual void sourceSettingsChanged() { }
// Observer state queries.
virtual bool preventSourceFromStopping() { return false; }
// Called on the main thread.
virtual void videoSampleAvailable(MediaSample&) { }
// May be called on a background thread.
virtual void audioSamplesAvailable(const MediaTime&, const PlatformAudioData&, const AudioStreamDescription&, size_t /*numberOfFrames*/) { }
};
virtual ~RealtimeMediaSource() { }
const String& id() const { return m_id; }
const String& persistentID() const { return m_persistentID; }
virtual void setPersistentID(const String& persistentID) { m_persistentID = persistentID; }
enum Type { None, Audio, Video };
Type type() const { return m_type; }
virtual const String& name() const { return m_name; }
virtual void setName(const String& name) { m_name = name; }
virtual unsigned fitnessScore() const { return m_fitnessScore; }
virtual void setFitnessScore(const unsigned fitnessScore) { m_fitnessScore = fitnessScore; }
virtual RefPtr<RealtimeMediaSourceCapabilities> capabilities() const = 0;
virtual const RealtimeMediaSourceSettings& settings() const = 0;
using SuccessHandler = std::function<void()>;
using FailureHandler = std::function<void(const String& badConstraint, const String& errorString)>;
void applyConstraints(const MediaConstraints&, SuccessHandler, FailureHandler);
std::optional<std::pair<String, String>> applyConstraints(const MediaConstraints&);
virtual bool supportsConstraints(const MediaConstraints&, String&);
virtual void settingsDidChange();
void videoSampleAvailable(MediaSample&);
void audioSamplesAvailable(const MediaTime&, const PlatformAudioData&, const AudioStreamDescription&, size_t);
bool stopped() const { return m_stopped; }
virtual bool muted() const { return m_muted; }
virtual void setMuted(bool);
virtual bool enabled() const { return m_enabled; }
virtual void setEnabled(bool);
virtual bool readonly() const;
virtual void setReadonly(bool readonly) { m_readonly = readonly; }
virtual bool remote() const { return m_remote; }
virtual void setRemote(bool remote) { m_remote = remote; }
void addObserver(Observer&);
void removeObserver(Observer&);
virtual void startProducingData() { }
virtual void stopProducingData() { }
virtual bool isProducingData() const { return false; }
void stop(Observer* callingObserver = nullptr);
void requestStop(Observer* callingObserver = nullptr);
virtual void reset();
virtual AudioSourceProvider* audioSourceProvider() { return nullptr; }
virtual RefPtr<Image> currentFrameImage() { return nullptr; }
virtual void paintCurrentFrameInContext(GraphicsContext&, const FloatRect&) { }
void setWidth(int);
void setHeight(int);
const IntSize& size() const { return m_size; }
virtual bool applySize(const IntSize&) { return false; }
double frameRate() const { return m_frameRate; }
void setFrameRate(double);
virtual bool applyFrameRate(double) { return false; }
double aspectRatio() const { return m_aspectRatio; }
void setAspectRatio(double);
virtual bool applyAspectRatio(double) { return false; }
RealtimeMediaSourceSettings::VideoFacingMode facingMode() const { return m_facingMode; }
void setFacingMode(RealtimeMediaSourceSettings::VideoFacingMode);
virtual bool applyFacingMode(RealtimeMediaSourceSettings::VideoFacingMode) { return false; }
double volume() const { return m_volume; }
void setVolume(double);
virtual bool applyVolume(double) { return false; }
int sampleRate() const { return m_sampleRate; }
void setSampleRate(int);
virtual bool applySampleRate(int) { return false; }
int sampleSize() const { return m_sampleSize; }
void setSampleSize(int);
virtual bool applySampleSize(int) { return false; }
bool echoCancellation() const { return m_echoCancellation; }
void setEchoCancellation(bool);
virtual bool applyEchoCancellation(bool) { return false; }
protected:
RealtimeMediaSource(const String& id, Type, const String& name);
void scheduleDeferredTask(std::function<void()>&&);
virtual void beginConfiguration() { }
virtual void commitConfiguration() { }
virtual bool selectSettings(const MediaConstraints&, FlattenedConstraint&, String&);
virtual double fitnessDistance(const MediaConstraint&);
virtual bool supportsSizeAndFrameRate(std::optional<IntConstraint> width, std::optional<IntConstraint> height, std::optional<DoubleConstraint>, String&);
virtual bool supportsSizeAndFrameRate(std::optional<int> width, std::optional<int> height, std::optional<double>);
virtual void applyConstraint(const MediaConstraint&);
virtual void applyConstraints(const FlattenedConstraint&);
virtual void applySizeAndFrameRate(std::optional<int> width, std::optional<int> height, std::optional<double>);
bool m_muted { false };
bool m_enabled { true };
private:
WeakPtr<RealtimeMediaSource> createWeakPtr() { return m_weakPtrFactory.createWeakPtr(); }
WeakPtrFactory<RealtimeMediaSource> m_weakPtrFactory;
String m_id;
String m_persistentID;
Type m_type;
String m_name;
Vector<Observer*> m_observers;
IntSize m_size;
double m_frameRate { 30 };
double m_aspectRatio { 0 };
double m_volume { 1 };
double m_sampleRate { 0 };
double m_sampleSize { 0 };
unsigned m_fitnessScore { 0 };
RealtimeMediaSourceSettings::VideoFacingMode m_facingMode { RealtimeMediaSourceSettings::User};
bool m_echoCancellation { false };
bool m_stopped { false };
bool m_readonly { false };
bool m_remote { false };
bool m_pendingSettingsDidChangeNotification { false };
bool m_suppressNotifications { true };
};
} // namespace WebCore
#endif // ENABLE(MEDIA_STREAM)
#endif // RealtimeMediaSource_h
|
