mirror of
https://github.com/servo/servo.git
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f3bc183dba
* Add disconnect methods * Use Dom, not DomRoot DomRoot will keep it permanently rooted, it should only be used in values not on the JS heap
97 lines
3.4 KiB
Rust
97 lines
3.4 KiB
Rust
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v.2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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use dom::audionode::AudioNode;
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use dom::audioparam::{AudioParam, AudioParamImpl};
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use dom::baseaudiocontext::BaseAudioContext;
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use dom::bindings::codegen::Bindings::AudioParamBinding::AutomationRate;
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use dom::bindings::codegen::Bindings::AudioNodeBinding::AudioNodeOptions;
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use dom::bindings::codegen::Bindings::AudioNodeBinding::{ChannelCountMode, ChannelInterpretation};
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use dom::bindings::codegen::Bindings::GainNodeBinding::{self, GainNodeMethods, GainOptions};
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use dom::bindings::error::Fallible;
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use dom::bindings::reflector::reflect_dom_object;
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use dom::bindings::root::{Dom, DomRoot};
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use dom::window::Window;
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use dom_struct::dom_struct;
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use servo_media::audio::context::AudioContext;
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use servo_media::audio::gain_node::{GainNodeMessage, GainNodeOptions};
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use servo_media::audio::graph::NodeId;
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use servo_media::audio::node::{AudioNodeMessage, AudioNodeType};
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use servo_media::audio::param::{UserAutomationEvent, RampKind};
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use std::f32;
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use std::rc::Rc;
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audio_param_impl!(Gain, GainNode, GainNodeMessage, SetGain);
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#[dom_struct]
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pub struct GainNode {
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node: AudioNode,
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gain: Dom<AudioParam>,
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}
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impl GainNode {
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#[allow(unsafe_code)]
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#[allow(unrooted_must_root)]
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pub fn new_inherited(
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window: &Window,
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context: &BaseAudioContext,
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gain_options: &GainOptions,
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) -> GainNode {
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let mut node_options = unsafe { AudioNodeOptions::empty(window.get_cx()) };
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node_options.channelCount = Some(2);
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node_options.channelCountMode = Some(ChannelCountMode::Max);
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node_options.channelInterpretation = Some(ChannelInterpretation::Speakers);
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let node = AudioNode::new_inherited(
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AudioNodeType::GainNode(gain_options.into()),
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None,
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context,
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&node_options,
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1, // inputs
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1, // outputs
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);
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let gain = Gain::new(context.audio_context_impl(), node.node_id());
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let gain = AudioParam::new(window,
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Box::new(gain),
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AutomationRate::A_rate,
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1., // default value
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f32::MIN, // min value
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f32::MAX, // max value
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);
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GainNode {
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node,
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gain: Dom::from_ref(&gain),
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}
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}
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#[allow(unrooted_must_root)]
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pub fn new(window: &Window,
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context: &BaseAudioContext,
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options: &GainOptions
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) -> DomRoot<GainNode> {
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let node = GainNode::new_inherited(window, context, options);
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reflect_dom_object(Box::new(node), window, GainNodeBinding::Wrap)
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}
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pub fn Constructor(
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window: &Window,
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context: &BaseAudioContext,
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options: &GainOptions,
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) -> Fallible<DomRoot<GainNode>> {
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Ok(GainNode::new(window, context, options))
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}
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}
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impl GainNodeMethods for GainNode {
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fn Gain(&self) -> DomRoot<AudioParam> {
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DomRoot::from_ref(&self.gain)
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}
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}
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impl<'a> From<&'a GainOptions> for GainNodeOptions {
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fn from(options: &'a GainOptions) -> Self {
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Self {
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gain: *options.gain,
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}
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}
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}
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