-
Notifications
You must be signed in to change notification settings - Fork 49
/
node.rs
217 lines (190 loc) · 6.11 KB
/
node.rs
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
use biquad_filter_node::{BiquadFilterNodeMessage, BiquadFilterNodeOptions};
use block::{Block, Chunk, Tick};
use boxfnonce::SendBoxFnOnce;
use buffer_source_node::{AudioBufferSourceNodeMessage, AudioBufferSourceNodeOptions};
use channel_node::ChannelNodeOptions;
use constant_source_node::ConstantSourceNodeOptions;
use gain_node::GainNodeOptions;
use oscillator_node::OscillatorNodeOptions;
use panner_node::{PannerNodeMessage, PannerNodeOptions};
use param::{Param, ParamRate, ParamType, UserAutomationEvent};
use std::sync::mpsc::Sender;
/// Information required to construct an audio node
pub enum AudioNodeInit {
AnalyserNode(Box<FnMut(Block) + Send>),
BiquadFilterNode(BiquadFilterNodeOptions),
AudioBuffer,
AudioBufferSourceNode(AudioBufferSourceNodeOptions),
ChannelMergerNode(ChannelNodeOptions),
ChannelSplitterNode,
ConstantSourceNode(ConstantSourceNodeOptions),
ConvolverNode,
DelayNode,
DynamicsCompressionNode,
GainNode(GainNodeOptions),
IIRFilterNode,
OscillatorNode(OscillatorNodeOptions),
PannerNode(PannerNodeOptions),
PeriodicWave,
ScriptProcessorNode,
StereoPannerNode,
WaveShaperNode,
}
/// Type of AudioNodeEngine.
#[derive(Debug, Clone, Copy)]
pub enum AudioNodeType {
/// Not a constructable node
AudioListenerNode,
AnalyserNode,
BiquadFilterNode,
AudioBuffer,
AudioBufferSourceNode,
ChannelMergerNode,
ChannelSplitterNode,
ConstantSourceNode,
ConvolverNode,
DelayNode,
DestinationNode,
DynamicsCompressionNode,
GainNode,
IIRFilterNode,
OscillatorNode,
PannerNode,
PeriodicWave,
ScriptProcessorNode,
StereoPannerNode,
WaveShaperNode,
}
#[derive(Copy, Clone, PartialEq, Eq, Debug)]
pub enum ChannelCountMode {
Max,
ClampedMax,
Explicit,
}
#[derive(Copy, Clone, PartialEq, Eq, Debug)]
pub enum ChannelInterpretation {
Discrete,
Speakers,
}
#[derive(Copy, Clone)]
pub struct BlockInfo {
pub sample_rate: f32,
pub frame: Tick,
pub time: f64,
}
impl BlockInfo {
/// Given the current block, calculate the absolute zero-relative
/// tick of the given tick
pub fn absolute_tick(&self, tick: Tick) -> Tick {
self.frame + tick
}
}
pub struct ChannelInfo {
pub count: u8,
pub mode: ChannelCountMode,
pub interpretation: ChannelInterpretation,
}
impl Default for ChannelInfo {
fn default() -> Self {
ChannelInfo {
count: 2,
mode: ChannelCountMode::Max,
interpretation: ChannelInterpretation::Speakers,
}
}
}
pub(crate) trait AudioNodeCommon {
fn channel_info(&self) -> &ChannelInfo;
fn channel_info_mut(&mut self) -> &mut ChannelInfo;
}
/// This trait represents the common features of all audio nodes.
pub(crate) trait AudioNodeEngine: Send + AudioNodeCommon {
fn node_type(&self) -> AudioNodeType;
fn process(&mut self, inputs: Chunk, info: &BlockInfo) -> Chunk;
fn message(&mut self, msg: AudioNodeMessage, sample_rate: f32) {
match msg {
AudioNodeMessage::GetParamValue(id, tx) => {
let _ = tx.send(self.get_param(id).value());
}
AudioNodeMessage::SetChannelCount(c) => self.set_channel_count(c),
AudioNodeMessage::SetChannelMode(c) => self.set_channel_count_mode(c),
AudioNodeMessage::SetChannelInterpretation(c) => self.set_channel_interpretation(c),
AudioNodeMessage::SetParam(id, event) => {
self.get_param(id).insert_event(event.to_event(sample_rate))
}
AudioNodeMessage::SetParamRate(id, rate) => self.get_param(id).set_rate(rate),
_ => self.message_specific(msg, sample_rate),
}
}
/// Messages specific to this node
fn message_specific(&mut self, _: AudioNodeMessage, _sample_rate: f32) {}
fn input_count(&self) -> u32 {
1
}
fn output_count(&self) -> u32 {
1
}
/// Number of input channels for each input port
fn channel_count(&self) -> u8 {
self.channel_info().count
}
fn channel_count_mode(&self) -> ChannelCountMode {
self.channel_info().mode
}
fn channel_interpretation(&self) -> ChannelInterpretation {
self.channel_info().interpretation
}
fn set_channel_interpretation(&mut self, i: ChannelInterpretation) {
self.channel_info_mut().interpretation = i
}
fn set_channel_count(&mut self, c: u8) {
self.channel_info_mut().count = c;
}
fn set_channel_count_mode(&mut self, m: ChannelCountMode) {
self.channel_info_mut().mode = m;
}
/// If we're the destination node, extract the contained data
fn destination_data(&mut self) -> Option<Chunk> {
None
}
fn get_param(&mut self, _: ParamType) -> &mut Param {
panic!("No params on node {:?}", self.node_type())
}
fn set_listenerdata(&mut self, _: Block) {
panic!("{:?} can't accept listener connections")
}
}
pub enum AudioNodeMessage {
AudioBufferSourceNode(AudioBufferSourceNodeMessage),
AudioScheduledSourceNode(AudioScheduledSourceNodeMessage),
BiquadFilterNode(BiquadFilterNodeMessage),
PannerNode(PannerNodeMessage),
GetParamValue(ParamType, Sender<f32>),
SetChannelCount(u8),
SetChannelMode(ChannelCountMode),
SetChannelInterpretation(ChannelInterpretation),
SetParam(ParamType, UserAutomationEvent),
SetParamRate(ParamType, ParamRate),
}
pub struct OnEndedCallback(pub SendBoxFnOnce<'static, ()>);
impl OnEndedCallback {
pub fn new<F: FnOnce() + Send + 'static>(callback: F) -> Self {
OnEndedCallback(SendBoxFnOnce::new(callback))
}
}
/// Type of message directed to AudioScheduledSourceNodes.
pub enum AudioScheduledSourceNodeMessage {
/// Schedules a sound to playback at an exact time.
Start(f64),
/// Schedules a sound to stop playback at an exact time.
Stop(f64),
/// Register onended event callback.
RegisterOnEndedCallback(OnEndedCallback),
}
#[derive(Clone, Copy, PartialEq, Eq)]
pub enum ShouldPlay {
/// Don't play anything
No,
/// Play, given start and end tick offsets
Between(Tick, Tick),
}