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
|
/*
* Copyright (C) 2013 Google Inc. All rights reserved.
* Copyright (C) 2013-2014 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of Google Inc. 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 SourceBuffer_h
#define SourceBuffer_h
#if ENABLE(MEDIA_SOURCE)
#include "ActiveDOMObject.h"
#include "AudioTrack.h"
#include "EventTarget.h"
#include "ExceptionCode.h"
#include "GenericEventQueue.h"
#include "ScriptWrappable.h"
#include "SourceBufferPrivateClient.h"
#include "TextTrack.h"
#include "Timer.h"
#include "VideoTrack.h"
#include <runtime/ArrayBufferView.h>
#include <wtf/PassRefPtr.h>
#include <wtf/RefCounted.h>
#include <wtf/text/WTFString.h>
namespace WebCore {
class AudioTrackList;
class MediaSource;
class PlatformTimeRanges;
class SourceBufferPrivate;
class TextTrackList;
class TimeRanges;
class VideoTrackList;
class SourceBuffer final : public RefCounted<SourceBuffer>, public ActiveDOMObject, public EventTargetWithInlineData, public ScriptWrappable, public SourceBufferPrivateClient, public AudioTrackClient, public VideoTrackClient, public TextTrackClient {
public:
static PassRef<SourceBuffer> create(PassRef<SourceBufferPrivate>, MediaSource*);
virtual ~SourceBuffer();
// SourceBuffer.idl methods
bool updating() const { return m_updating; }
PassRefPtr<TimeRanges> buffered(ExceptionCode&) const;
const RefPtr<TimeRanges>& buffered() const;
double timestampOffset() const;
void setTimestampOffset(double, ExceptionCode&);
void appendBuffer(PassRefPtr<ArrayBuffer> data, ExceptionCode&);
void appendBuffer(PassRefPtr<ArrayBufferView> data, ExceptionCode&);
void abort(ExceptionCode&);
void remove(double start, double end, ExceptionCode&);
void remove(const MediaTime&, const MediaTime&, ExceptionCode&);
void abortIfUpdating();
void removedFromMediaSource();
const MediaTime& highestPresentationEndTimestamp() const { return m_highestPresentationEndTimestamp; }
void seekToTime(const MediaTime&);
#if ENABLE(VIDEO_TRACK)
VideoTrackList* videoTracks();
AudioTrackList* audioTracks();
TextTrackList* textTracks();
#endif
bool hasCurrentTime() const;
bool hasFutureTime() const;
bool canPlayThrough();
bool hasVideo() const;
bool hasAudio() const;
bool active() const { return m_active; }
// ActiveDOMObject interface
virtual bool hasPendingActivity() const override;
virtual void stop() override;
// EventTarget interface
virtual ScriptExecutionContext* scriptExecutionContext() const override { return ActiveDOMObject::scriptExecutionContext(); }
virtual EventTargetInterface eventTargetInterface() const override { return SourceBufferEventTargetInterfaceType; }
using RefCounted<SourceBuffer>::ref;
using RefCounted<SourceBuffer>::deref;
struct TrackBuffer;
Document& document() const;
protected:
// EventTarget interface
virtual void refEventTarget() override { ref(); }
virtual void derefEventTarget() override { deref(); }
private:
SourceBuffer(PassRef<SourceBufferPrivate>, MediaSource*);
// SourceBufferPrivateClient
virtual void sourceBufferPrivateDidEndStream(SourceBufferPrivate*, const WTF::AtomicString&) override;
virtual void sourceBufferPrivateDidReceiveInitializationSegment(SourceBufferPrivate*, const InitializationSegment&) override;
virtual void sourceBufferPrivateDidReceiveSample(SourceBufferPrivate*, PassRefPtr<MediaSample>) override;
virtual bool sourceBufferPrivateHasAudio(const SourceBufferPrivate*) const override;
virtual bool sourceBufferPrivateHasVideo(const SourceBufferPrivate*) const override;
virtual void sourceBufferPrivateDidBecomeReadyForMoreSamples(SourceBufferPrivate*, AtomicString trackID) override;
virtual MediaTime sourceBufferPrivateFastSeekTimeForMediaTime(SourceBufferPrivate*, const MediaTime&, const MediaTime& negativeThreshold, const MediaTime& positiveThreshold);
virtual void sourceBufferPrivateAppendComplete(SourceBufferPrivate*, AppendResult) override;
virtual void sourceBufferPrivateDidReceiveRenderingError(SourceBufferPrivate*, int errorCode) override;
// AudioTrackClient
virtual void audioTrackEnabledChanged(AudioTrack*) override;
// VideoTrackClient
virtual void videoTrackSelectedChanged(VideoTrack*) override;
// TextTrackClient
virtual void textTrackKindChanged(TextTrack*) override;
virtual void textTrackModeChanged(TextTrack*) override;
virtual void textTrackAddCues(TextTrack*, const TextTrackCueList*) override;
virtual void textTrackRemoveCues(TextTrack*, const TextTrackCueList*) override;
virtual void textTrackAddCue(TextTrack*, PassRefPtr<TextTrackCue>) override;
virtual void textTrackRemoveCue(TextTrack*, PassRefPtr<TextTrackCue>) override;
static const WTF::AtomicString& decodeError();
static const WTF::AtomicString& networkError();
bool isRemoved() const;
void scheduleEvent(const AtomicString& eventName);
void appendBufferInternal(unsigned char*, unsigned, ExceptionCode&);
void appendBufferTimerFired(Timer<SourceBuffer>&);
void setActive(bool);
bool validateInitializationSegment(const InitializationSegment&);
void reenqueueMediaForTime(TrackBuffer&, AtomicString trackID, const MediaTime&);
void provideMediaData(TrackBuffer&, AtomicString trackID);
void didDropSample();
void evictCodedFrames(size_t newDataSize);
size_t maximumBufferSize() const;
void monitorBufferingRate();
void removeTimerFired(Timer<SourceBuffer>*);
void removeCodedFrames(const MediaTime& start, const MediaTime& end);
size_t extraMemoryCost() const;
void reportExtraMemoryCost();
std::unique_ptr<PlatformTimeRanges> bufferedAccountingForEndOfStream() const;
// Internals
friend class Internals;
Vector<String> bufferedSamplesForTrackID(const AtomicString&);
Ref<SourceBufferPrivate> m_private;
MediaSource* m_source;
GenericEventQueue m_asyncEventQueue;
Vector<unsigned char> m_pendingAppendData;
Timer<SourceBuffer> m_appendBufferTimer;
RefPtr<VideoTrackList> m_videoTracks;
RefPtr<AudioTrackList> m_audioTracks;
RefPtr<TextTrackList> m_textTracks;
Vector<AtomicString> m_videoCodecs;
Vector<AtomicString> m_audioCodecs;
Vector<AtomicString> m_textCodecs;
MediaTime m_timestampOffset;
MediaTime m_highestPresentationEndTimestamp;
HashMap<AtomicString, TrackBuffer> m_trackBufferMap;
RefPtr<TimeRanges> m_buffered;
enum AppendStateType { WaitingForSegment, ParsingInitSegment, ParsingMediaSegment };
AppendStateType m_appendState;
double m_timeOfBufferingMonitor;
double m_bufferedSinceLastMonitor;
double m_averageBufferRate;
size_t m_reportedExtraMemoryCost;
MediaTime m_pendingRemoveStart;
MediaTime m_pendingRemoveEnd;
Timer<SourceBuffer> m_removeTimer;
bool m_updating;
bool m_receivedFirstInitializationSegment;
bool m_active;
bool m_bufferFull;
};
} // namespace WebCore
#endif
#endif
|
