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/* 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/. */
use crate::dom::audioparam::AudioParam;
use crate::dom::audioscheduledsourcenode::AudioScheduledSourceNode;
use crate::dom::baseaudiocontext::BaseAudioContext;
use crate::dom::bindings::codegen::Bindings::AudioNodeBinding::{
ChannelCountMode, ChannelInterpretation,
};
use crate::dom::bindings::codegen::Bindings::AudioParamBinding::AutomationRate;
use crate::dom::bindings::codegen::Bindings::OscillatorNodeBinding::OscillatorNodeMethods;
use crate::dom::bindings::codegen::Bindings::OscillatorNodeBinding::{
self, OscillatorOptions, OscillatorType,
};
use crate::dom::bindings::error::Fallible;
use crate::dom::bindings::reflector::reflect_dom_object;
use crate::dom::bindings::root::{Dom, DomRoot};
use crate::dom::window::Window;
use dom_struct::dom_struct;
use servo_media::audio::node::AudioNodeInit;
use servo_media::audio::oscillator_node::OscillatorNodeOptions as ServoMediaOscillatorOptions;
use servo_media::audio::oscillator_node::OscillatorType as ServoMediaOscillatorType;
use servo_media::audio::param::ParamType;
use std::f32;
#[dom_struct]
pub struct OscillatorNode {
source_node: AudioScheduledSourceNode,
oscillator_type: OscillatorType,
frequency: Dom<AudioParam>,
detune: Dom<AudioParam>,
}
impl OscillatorNode {
#[allow(unrooted_must_root)]
pub fn new_inherited(
window: &Window,
context: &BaseAudioContext,
options: &OscillatorOptions,
) -> Fallible<OscillatorNode> {
let node_options =
options
.parent
.unwrap_or(2, ChannelCountMode::Max, ChannelInterpretation::Speakers);
let source_node = AudioScheduledSourceNode::new_inherited(
AudioNodeInit::OscillatorNode(options.into()),
context,
node_options,
0, /* inputs */
1, /* outputs */
)?;
let node_id = source_node.node().node_id();
let frequency = AudioParam::new(
window,
context,
node_id,
ParamType::Frequency,
AutomationRate::A_rate,
440.,
f32::MIN,
f32::MAX,
);
let detune = AudioParam::new(
window,
context,
node_id,
ParamType::Detune,
AutomationRate::A_rate,
0.,
-440. / 2.,
440. / 2.,
);
Ok(OscillatorNode {
source_node,
oscillator_type: options.type_,
frequency: Dom::from_ref(&frequency),
detune: Dom::from_ref(&detune),
})
}
#[allow(unrooted_must_root)]
pub fn new(
window: &Window,
context: &BaseAudioContext,
options: &OscillatorOptions,
) -> Fallible<DomRoot<OscillatorNode>> {
let node = OscillatorNode::new_inherited(window, context, options)?;
Ok(reflect_dom_object(
Box::new(node),
window,
OscillatorNodeBinding::Wrap,
))
}
pub fn Constructor(
window: &Window,
context: &BaseAudioContext,
options: &OscillatorOptions,
) -> Fallible<DomRoot<OscillatorNode>> {
OscillatorNode::new(window, context, options)
}
}
impl OscillatorNodeMethods for OscillatorNode {
// https://webaudio.github.io/web-audio-api/#dom-oscillatornode-frequency
fn Frequency(&self) -> DomRoot<AudioParam> {
DomRoot::from_ref(&self.frequency)
}
// https://webaudio.github.io/web-audio-api/#dom-oscillatornode-detune
fn Detune(&self) -> DomRoot<AudioParam> {
DomRoot::from_ref(&self.detune)
}
}
impl<'a> From<&'a OscillatorOptions> for ServoMediaOscillatorOptions {
fn from(options: &'a OscillatorOptions) -> Self {
Self {
oscillator_type: options.type_.into(),
freq: *options.frequency,
detune: *options.detune,
periodic_wave_options: None, // XXX
}
}
}
impl From<OscillatorType> for ServoMediaOscillatorType {
fn from(oscillator_type: OscillatorType) -> Self {
match oscillator_type {
OscillatorType::Sine => ServoMediaOscillatorType::Sine,
OscillatorType::Square => ServoMediaOscillatorType::Square,
OscillatorType::Sawtooth => ServoMediaOscillatorType::Sawtooth,
OscillatorType::Triangle => ServoMediaOscillatorType::Triangle,
OscillatorType::Custom => ServoMediaOscillatorType::Custom,
}
}
}
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