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
230
231
232
233
|
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-*/
/* 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/. */
#ifndef MOZILLA_AUDIONODETRACK_H_
#define MOZILLA_AUDIONODETRACK_H_
#include "MediaTrackGraph.h"
#include "mozilla/dom/AudioNodeBinding.h"
#include "AlignedTArray.h"
#include "AudioBlock.h"
#include "AudioSegment.h"
namespace WebCore {
class Reverb;
} // namespace WebCore
namespace mozilla {
namespace dom {
struct ThreeDPoint;
struct AudioParamEvent;
class AudioContext;
} // namespace dom
class AbstractThread;
class ThreadSharedFloatArrayBufferList;
class AudioNodeEngine;
typedef AlignedAutoTArray<float, GUESS_AUDIO_CHANNELS * WEBAUDIO_BLOCK_SIZE, 16>
DownmixBufferType;
/**
* An AudioNodeTrack produces one audio track with ID AUDIO_TRACK.
* The start time of the AudioTrack is aligned to the start time of the
* AudioContext's destination node track, plus some multiple of BLOCK_SIZE
* samples.
*
* An AudioNodeTrack has an AudioNodeEngine plugged into it that does the
* actual audio processing. AudioNodeTrack contains the glue code that
* integrates audio processing with the MediaTrackGraph.
*/
class AudioNodeTrack : public ProcessedMediaTrack {
typedef dom::ChannelCountMode ChannelCountMode;
typedef dom::ChannelInterpretation ChannelInterpretation;
public:
typedef mozilla::dom::AudioContext AudioContext;
enum { AUDIO_TRACK = 1 };
typedef AutoTArray<AudioBlock, 1> OutputChunks;
// Flags re main thread updates and track output.
typedef unsigned Flags;
enum : Flags {
NO_TRACK_FLAGS = 0U,
NEED_MAIN_THREAD_ENDED = 1U << 0,
NEED_MAIN_THREAD_CURRENT_TIME = 1U << 1,
// Internal AudioNodeTracks can only pass their output to another
// AudioNode, whereas external AudioNodeTracks can pass their output
// to other ProcessedMediaTracks or hardware audio output.
EXTERNAL_OUTPUT = 1U << 2,
};
/**
* Create a track that will process audio for an AudioNode.
* Takes ownership of aEngine.
* aGraph is required and equals the graph of aCtx in most cases. An exception
* is AudioDestinationNode where the context's graph hasn't been set up yet.
*/
static already_AddRefed<AudioNodeTrack> Create(AudioContext* aCtx,
AudioNodeEngine* aEngine,
Flags aKind,
MediaTrackGraph* aGraph);
protected:
/**
* Transfers ownership of aEngine to the new AudioNodeTrack.
*/
AudioNodeTrack(AudioNodeEngine* aEngine, Flags aFlags, TrackRate aSampleRate);
~AudioNodeTrack();
public:
// Control API
/**
* Sets a parameter that's a time relative to some track's played time.
* This time is converted to a time relative to this track when it's set.
*/
void SetTrackTimeParameter(uint32_t aIndex, AudioContext* aContext,
double aTrackTime);
void SetDoubleParameter(uint32_t aIndex, double aValue);
void SetInt32Parameter(uint32_t aIndex, int32_t aValue);
void SetThreeDPointParameter(uint32_t aIndex, const dom::ThreeDPoint& aValue);
void SetBuffer(AudioChunk&& aBuffer);
void SetReverb(WebCore::Reverb* aReverb, uint32_t aImpulseChannelCount);
// This sends a single event to the timeline on the MTG thread side.
void SendTimelineEvent(uint32_t aIndex, const dom::AudioParamEvent& aEvent);
// This consumes the contents of aData. aData will be emptied after this
// returns.
void SetRawArrayData(nsTArray<float>&& aData);
void SetChannelMixingParameters(uint32_t aNumberOfChannels,
ChannelCountMode aChannelCountMoe,
ChannelInterpretation aChannelInterpretation);
void SetPassThrough(bool aPassThrough);
void SendRunnable(already_AddRefed<nsIRunnable> aRunnable);
ChannelInterpretation GetChannelInterpretation() {
return mChannelInterpretation;
}
void SetAudioParamHelperTrack() {
MOZ_ASSERT(!mAudioParamTrack, "Can only do this once");
mAudioParamTrack = true;
}
// The value for channelCount on an AudioNode, but on the audio thread side.
uint32_t NumberOfChannels() const override;
/*
* Resume track after updating its concept of current time by aAdvance.
* Main thread. Used only from AudioDestinationNode when resuming a track
* suspended to save running the MediaTrackGraph when there are no other
* nodes in the AudioContext.
*/
void AdvanceAndResume(TrackTime aAdvance);
AudioNodeTrack* AsAudioNodeTrack() override { return this; }
void AddInput(MediaInputPort* aPort) override;
void RemoveInput(MediaInputPort* aPort) override;
// Graph thread only
void SetTrackTimeParameterImpl(uint32_t aIndex, MediaTrack* aRelativeToTrack,
double aTrackTime);
void SetChannelMixingParametersImpl(
uint32_t aNumberOfChannels, ChannelCountMode aChannelCountMoe,
ChannelInterpretation aChannelInterpretation);
void ProcessInput(GraphTime aFrom, GraphTime aTo, uint32_t aFlags) override;
/**
* Produce the next block of output, before input is provided.
* ProcessInput() will be called later, and it then should not change
* the output. This is used only for DelayNodeEngine in a feedback loop.
*/
void ProduceOutputBeforeInput(GraphTime aFrom);
bool IsAudioParamTrack() const { return mAudioParamTrack; }
const OutputChunks& LastChunks() const { return mLastChunks; }
bool MainThreadNeedsUpdates() const override {
return ((mFlags & NEED_MAIN_THREAD_ENDED) && mEnded) ||
(mFlags & NEED_MAIN_THREAD_CURRENT_TIME);
}
// Any thread
AudioNodeEngine* Engine() { return mEngine.get(); }
size_t SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const override;
size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const override;
void SizeOfAudioNodesIncludingThis(MallocSizeOf aMallocSizeOf,
AudioNodeSizes& aUsage) const;
/*
* SetActive() is called when either an active input is added or the engine
* for a source node transitions from inactive to active. This is not
* called from engines for processing nodes because they only become active
* when there are active input tracks, in which case this track is already
* active.
*/
void SetActive();
/*
* ScheduleCheckForInactive() is called during track processing when the
* engine transitions from active to inactive, or the track finishes. It
* schedules a call to CheckForInactive() after track processing.
*/
void ScheduleCheckForInactive();
protected:
void OnGraphThreadDone() override;
void DestroyImpl() override;
/*
* CheckForInactive() is called when the engine transitions from active to
* inactive, or an active input is removed, or the track finishes. If the
* track is now inactive, then mInputChunks will be cleared and mLastChunks
* will be set to null. ProcessBlock() will not be called on the engine
* again until SetActive() is called.
*/
void CheckForInactive();
void AdvanceOutputSegment();
void FinishOutput();
void AccumulateInputChunk(uint32_t aInputIndex, const AudioBlock& aChunk,
AudioBlock* aBlock,
DownmixBufferType* aDownmixBuffer);
void UpMixDownMixChunk(const AudioBlock* aChunk, uint32_t aOutputChannelCount,
nsTArray<const float*>& aOutputChannels,
DownmixBufferType& aDownmixBuffer);
uint32_t ComputedNumberOfChannels(uint32_t aInputChannelCount);
void ObtainInputBlock(AudioBlock& aTmpChunk, uint32_t aPortIndex);
void IncrementActiveInputCount();
void DecrementActiveInputCount();
// The engine that will generate output for this node.
const UniquePtr<AudioNodeEngine> mEngine;
// The mixed input blocks are kept from iteration to iteration to avoid
// reallocating channel data arrays and any buffers for mixing.
OutputChunks mInputChunks;
// The last block produced by this node.
OutputChunks mLastChunks;
// Whether this is an internal or external track
const Flags mFlags;
// The number of input tracks that may provide non-silent input.
uint32_t mActiveInputCount = 0;
// The number of input channels that this track requires. 0 means don't care.
uint32_t mNumberOfInputChannels;
// The mixing modes
ChannelCountMode mChannelCountMode;
ChannelInterpretation mChannelInterpretation;
// Tracks are considered active if the track has not finished and either
// the engine is active or there are active input tracks.
bool mIsActive;
// Whether the track should be marked as ended as soon
// as the current time range has been computed block by block.
bool mMarkAsEndedAfterThisBlock;
// Whether the track is an AudioParamHelper track.
bool mAudioParamTrack;
// Whether the track just passes its input through.
bool mPassThrough;
};
} // namespace mozilla
#endif /* MOZILLA_AUDIONODETRACK_H_ */
|
