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
|
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:set ts=2 sw=2 sts=2 et cindent: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "MediaStreamAudioDestinationNode.h"
#include "mozilla/dom/Document.h"
#include "mozilla/dom/MediaStreamAudioDestinationNodeBinding.h"
#include "AudioNodeEngine.h"
#include "AudioNodeTrack.h"
#include "AudioStreamTrack.h"
#include "DOMMediaStream.h"
#include "ForwardedInputTrack.h"
namespace mozilla::dom {
class AudioDestinationTrackSource final : public MediaStreamTrackSource {
public:
NS_DECL_ISUPPORTS_INHERITED
NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(AudioDestinationTrackSource,
MediaStreamTrackSource)
AudioDestinationTrackSource(MediaStreamAudioDestinationNode* aNode,
mozilla::MediaTrack* aInputTrack,
ProcessedMediaTrack* aTrack,
nsIPrincipal* aPrincipal)
: MediaStreamTrackSource(
aPrincipal, nsString(),
// We pass 0 here because tracking ids are video only for now.
TrackingId(TrackingId::Source::AudioDestinationNode, 0)),
mTrack(aTrack),
mPort(mTrack->AllocateInputPort(aInputTrack)),
mNode(aNode) {}
void Destroy() override {
if (!mTrack->IsDestroyed()) {
mTrack->Destroy();
mPort->Destroy();
}
if (mNode) {
mNode->DestroyMediaTrack();
mNode = nullptr;
}
}
MediaSourceEnum GetMediaSource() const override {
return MediaSourceEnum::AudioCapture;
}
void Stop() override { Destroy(); }
void Disable() override {}
void Enable() override {}
const RefPtr<ProcessedMediaTrack> mTrack;
const RefPtr<MediaInputPort> mPort;
private:
~AudioDestinationTrackSource() = default;
RefPtr<MediaStreamAudioDestinationNode> mNode;
};
NS_IMPL_ADDREF_INHERITED(AudioDestinationTrackSource, MediaStreamTrackSource)
NS_IMPL_RELEASE_INHERITED(AudioDestinationTrackSource, MediaStreamTrackSource)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(AudioDestinationTrackSource)
NS_INTERFACE_MAP_END_INHERITING(MediaStreamTrackSource)
NS_IMPL_CYCLE_COLLECTION_INHERITED(AudioDestinationTrackSource,
MediaStreamTrackSource, mNode)
NS_IMPL_CYCLE_COLLECTION_INHERITED(MediaStreamAudioDestinationNode, AudioNode,
mDOMStream)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(MediaStreamAudioDestinationNode)
NS_INTERFACE_MAP_END_INHERITING(AudioNode)
NS_IMPL_ADDREF_INHERITED(MediaStreamAudioDestinationNode, AudioNode)
NS_IMPL_RELEASE_INHERITED(MediaStreamAudioDestinationNode, AudioNode)
MediaStreamAudioDestinationNode::MediaStreamAudioDestinationNode(
AudioContext* aContext)
: AudioNode(aContext, 2, ChannelCountMode::Explicit,
ChannelInterpretation::Speakers),
mDOMStream(MakeAndAddRef<DOMMediaStream>(GetOwner())) {
// Ensure an audio track with the correct ID is exposed to JS. If we can't get
// a principal here because the document is not available, pass in a null
// principal. This happens in edge cases when the document is being unloaded
// and it does not matter too much to have something working as long as it's
// not dangerous.
nsCOMPtr<nsIPrincipal> principal = nullptr;
if (aContext->GetParentObject()) {
Document* doc = aContext->GetParentObject()->GetExtantDoc();
principal = doc->NodePrincipal();
}
mTrack = AudioNodeTrack::Create(aContext, new AudioNodeEngine(this),
AudioNodeTrack::EXTERNAL_OUTPUT,
aContext->Graph());
auto source = MakeRefPtr<AudioDestinationTrackSource>(
this, mTrack,
aContext->Graph()->CreateForwardedInputTrack(MediaSegment::AUDIO),
principal);
auto track = MakeRefPtr<AudioStreamTrack>(GetOwner(), source->mTrack, source);
mDOMStream->AddTrackInternal(track);
}
/* static */
already_AddRefed<MediaStreamAudioDestinationNode>
MediaStreamAudioDestinationNode::Create(AudioContext& aAudioContext,
const AudioNodeOptions& aOptions,
ErrorResult& aRv) {
// The spec has a pointless check here. See
// https://github.com/WebAudio/web-audio-api/issues/2149
MOZ_RELEASE_ASSERT(!aAudioContext.IsOffline(), "Bindings messed up?");
RefPtr<MediaStreamAudioDestinationNode> audioNode =
new MediaStreamAudioDestinationNode(&aAudioContext);
audioNode->Initialize(aOptions, aRv);
if (NS_WARN_IF(aRv.Failed())) {
return nullptr;
}
return audioNode.forget();
}
size_t MediaStreamAudioDestinationNode::SizeOfExcludingThis(
MallocSizeOf aMallocSizeOf) const {
// Future:
// - mDOMStream
size_t amount = AudioNode::SizeOfExcludingThis(aMallocSizeOf);
return amount;
}
size_t MediaStreamAudioDestinationNode::SizeOfIncludingThis(
MallocSizeOf aMallocSizeOf) const {
return aMallocSizeOf(this) + SizeOfExcludingThis(aMallocSizeOf);
}
void MediaStreamAudioDestinationNode::DestroyMediaTrack() {
AudioNode::DestroyMediaTrack();
}
JSObject* MediaStreamAudioDestinationNode::WrapObject(
JSContext* aCx, JS::Handle<JSObject*> aGivenProto) {
return MediaStreamAudioDestinationNode_Binding::Wrap(aCx, this, aGivenProto);
}
} // namespace mozilla::dom
|
