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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 https://mozilla.org/MPL/2.0/. */
use dom_struct::dom_struct;
use js::rust::HandleObject;
use servo_media::audio::node::{AudioNodeInit, AudioNodeType};
use servo_media::audio::param::ParamType;
use servo_media::audio::stereo_panner::StereoPannerOptions as ServoMediaStereoPannerOptions;
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::StereoPannerNodeBinding::{
StereoPannerNodeMethods, StereoPannerOptions,
};
use crate::dom::bindings::error::{Error, Fallible};
use crate::dom::bindings::reflector::reflect_dom_object_with_proto;
use crate::dom::bindings::root::{Dom, DomRoot};
use crate::dom::window::Window;
#[dom_struct]
pub struct StereoPannerNode {
source_node: AudioScheduledSourceNode,
pan: Dom<AudioParam>,
}
impl StereoPannerNode {
#[allow(crown::unrooted_must_root)]
pub fn new_inherited(
window: &Window,
context: &BaseAudioContext,
options: &StereoPannerOptions,
) -> Fallible<StereoPannerNode> {
let node_options = options.parent.unwrap_or(
2,
ChannelCountMode::Clamped_max,
ChannelInterpretation::Speakers,
);
if node_options.mode == ChannelCountMode::Max {
return Err(Error::NotSupported);
}
if node_options.count > 2 || node_options.count == 0 {
return Err(Error::NotSupported);
}
let source_node = AudioScheduledSourceNode::new_inherited(
AudioNodeInit::StereoPannerNode(options.into()),
context,
node_options,
1, /* inputs */
1, /* outputs */
)?;
let node_id = source_node.node().node_id();
let pan = AudioParam::new(
window,
context,
node_id,
AudioNodeType::StereoPannerNode,
ParamType::Pan,
AutomationRate::A_rate,
*options.pan,
-1.,
1.,
);
Ok(StereoPannerNode {
source_node,
pan: Dom::from_ref(&pan),
})
}
pub fn new(
window: &Window,
context: &BaseAudioContext,
options: &StereoPannerOptions,
) -> Fallible<DomRoot<StereoPannerNode>> {
Self::new_with_proto(window, None, context, options)
}
#[allow(crown::unrooted_must_root)]
fn new_with_proto(
window: &Window,
proto: Option<HandleObject>,
context: &BaseAudioContext,
options: &StereoPannerOptions,
) -> Fallible<DomRoot<StereoPannerNode>> {
let node = StereoPannerNode::new_inherited(window, context, options)?;
Ok(reflect_dom_object_with_proto(Box::new(node), window, proto))
}
#[allow(non_snake_case)]
pub fn Constructor(
window: &Window,
proto: Option<HandleObject>,
context: &BaseAudioContext,
options: &StereoPannerOptions,
) -> Fallible<DomRoot<StereoPannerNode>> {
StereoPannerNode::new_with_proto(window, proto, context, options)
}
}
impl StereoPannerNodeMethods for StereoPannerNode {
// https://webaudio.github.io/web-audio-api/#dom-stereopannernode-pan
fn Pan(&self) -> DomRoot<AudioParam> {
DomRoot::from_ref(&self.pan)
}
}
impl<'a> From<&'a StereoPannerOptions> for ServoMediaStereoPannerOptions {
fn from(options: &'a StereoPannerOptions) -> Self {
Self { pan: *options.pan }
}
}
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