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
|
/*
* Copyright (C) 2010, Google 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:
* 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.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS 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 APPLE INC. OR ITS 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.
*/
#include "third_party/blink/renderer/modules/webaudio/audio_node_output.h"
#include <memory>
#include "base/memory/ptr_util.h"
#include "third_party/blink/renderer/modules/webaudio/audio_node_input.h"
#include "third_party/blink/renderer/modules/webaudio/audio_node_wiring.h"
#include "third_party/blink/renderer/modules/webaudio/base_audio_context.h"
#include "third_party/blink/renderer/platform/wtf/threading.h"
namespace blink {
AudioNodeOutput::AudioNodeOutput(AudioHandler* handler,
unsigned number_of_channels)
: handler_(*handler),
number_of_channels_(number_of_channels),
desired_number_of_channels_(number_of_channels),
is_in_place_(false),
is_enabled_(true),
did_call_dispose_(false),
rendering_fan_out_count_(0),
rendering_param_fan_out_count_(0) {
DCHECK_LE(number_of_channels, BaseAudioContext::MaxNumberOfChannels());
internal_bus_ = AudioBus::Create(number_of_channels,
audio_utilities::kRenderQuantumFrames);
}
void AudioNodeOutput::Dispose() {
did_call_dispose_ = true;
GetDeferredTaskHandler().RemoveMarkedAudioNodeOutput(this);
DisconnectAll();
DCHECK(inputs_.IsEmpty());
DCHECK(params_.IsEmpty());
}
void AudioNodeOutput::SetNumberOfChannels(unsigned number_of_channels) {
DCHECK_LE(number_of_channels, BaseAudioContext::MaxNumberOfChannels());
GetDeferredTaskHandler().AssertGraphOwner();
desired_number_of_channels_ = number_of_channels;
if (GetDeferredTaskHandler().IsAudioThread()) {
// If we're in the audio thread then we can take care of it right away (we
// should be at the very start or end of a rendering quantum).
UpdateNumberOfChannels();
} else {
DCHECK(!did_call_dispose_);
// Let the context take care of it in the audio thread in the pre and post
// render tasks.
GetDeferredTaskHandler().MarkAudioNodeOutputDirty(this);
}
}
void AudioNodeOutput::UpdateInternalBus() {
if (NumberOfChannels() == internal_bus_->NumberOfChannels())
return;
internal_bus_ = AudioBus::Create(NumberOfChannels(),
audio_utilities::kRenderQuantumFrames);
}
void AudioNodeOutput::UpdateRenderingState() {
UpdateNumberOfChannels();
rendering_fan_out_count_ = FanOutCount();
rendering_param_fan_out_count_ = ParamFanOutCount();
}
void AudioNodeOutput::UpdateNumberOfChannels() {
DCHECK(GetDeferredTaskHandler().IsAudioThread());
GetDeferredTaskHandler().AssertGraphOwner();
if (number_of_channels_ != desired_number_of_channels_) {
number_of_channels_ = desired_number_of_channels_;
UpdateInternalBus();
PropagateChannelCount();
}
}
void AudioNodeOutput::PropagateChannelCount() {
DCHECK(GetDeferredTaskHandler().IsAudioThread());
GetDeferredTaskHandler().AssertGraphOwner();
if (IsChannelCountKnown()) {
// Announce to any nodes we're connected to that we changed our channel
// count for its input.
for (AudioNodeInput* i : inputs_)
i->Handler().CheckNumberOfChannelsForInput(i);
}
}
AudioBus* AudioNodeOutput::Pull(AudioBus* in_place_bus,
uint32_t frames_to_process) {
DCHECK(GetDeferredTaskHandler().IsAudioThread());
DCHECK(rendering_fan_out_count_ > 0 || rendering_param_fan_out_count_ > 0);
// Causes our AudioNode to process if it hasn't already for this render
// quantum. We try to do in-place processing (using inPlaceBus) if at all
// possible, but we can't process in-place if we're connected to more than one
// input (fan-out > 1). In this case pull() is called multiple times per
// rendering quantum, and the processIfNecessary() call below will cause our
// node to process() only the first time, caching the output in
// m_internalOutputBus for subsequent calls.
is_in_place_ =
in_place_bus && in_place_bus->NumberOfChannels() == NumberOfChannels() &&
(rendering_fan_out_count_ + rendering_param_fan_out_count_) == 1;
in_place_bus_ = is_in_place_ ? in_place_bus : nullptr;
Handler().ProcessIfNecessary(frames_to_process);
return Bus();
}
AudioBus* AudioNodeOutput::Bus() const {
DCHECK(GetDeferredTaskHandler().IsAudioThread());
return is_in_place_ ? in_place_bus_.get() : internal_bus_.get();
}
unsigned AudioNodeOutput::FanOutCount() {
GetDeferredTaskHandler().AssertGraphOwner();
return inputs_.size();
}
unsigned AudioNodeOutput::ParamFanOutCount() {
GetDeferredTaskHandler().AssertGraphOwner();
return params_.size();
}
unsigned AudioNodeOutput::RenderingFanOutCount() const {
return rendering_fan_out_count_;
}
void AudioNodeOutput::DisconnectAllInputs() {
GetDeferredTaskHandler().AssertGraphOwner();
// Disconnect changes inputs_, so we can't iterate directly over the hash set.
Vector<AudioNodeInput*, 4> inputs;
CopyToVector(inputs_, inputs);
for (AudioNodeInput* input : inputs)
AudioNodeWiring::Disconnect(*this, *input);
DCHECK(inputs_.IsEmpty());
}
void AudioNodeOutput::DisconnectAllParams() {
GetDeferredTaskHandler().AssertGraphOwner();
// Disconnect changes params_, so we can't iterate directly over the hash set.
Vector<AudioParamHandler*, 4> params;
CopyToVector(params_, params);
for (AudioParamHandler* param : params)
AudioNodeWiring::Disconnect(*this, *param);
DCHECK(params_.IsEmpty());
}
void AudioNodeOutput::DisconnectAll() {
DisconnectAllInputs();
DisconnectAllParams();
}
void AudioNodeOutput::Disable() {
GetDeferredTaskHandler().AssertGraphOwner();
if (is_enabled_) {
is_enabled_ = false;
for (AudioNodeInput* input : inputs_)
AudioNodeWiring::Disable(*this, *input);
}
}
void AudioNodeOutput::Enable() {
GetDeferredTaskHandler().AssertGraphOwner();
if (!is_enabled_) {
is_enabled_ = true;
for (AudioNodeInput* input : inputs_)
AudioNodeWiring::Enable(*this, *input);
}
}
} // namespace blink
|
