script/dom/audio/
constantsourcenode.rs

1/* This Source Code Form is subject to the terms of the Mozilla Public
2 * License, v. 2.0. If a copy of the MPL was not distributed with this
3 * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
4
5use std::f32;
6
7use dom_struct::dom_struct;
8use js::rust::HandleObject;
9use servo_media::audio::constant_source_node::ConstantSourceNodeOptions as ServoMediaConstantSourceOptions;
10use servo_media::audio::node::{AudioNodeInit, AudioNodeType};
11use servo_media::audio::param::ParamType;
12
13use crate::conversions::Convert;
14use crate::dom::audio::audioparam::AudioParam;
15use crate::dom::audio::audioscheduledsourcenode::AudioScheduledSourceNode;
16use crate::dom::audio::baseaudiocontext::BaseAudioContext;
17use crate::dom::bindings::codegen::Bindings::AudioParamBinding::AutomationRate;
18use crate::dom::bindings::codegen::Bindings::ConstantSourceNodeBinding::{
19    ConstantSourceNodeMethods, ConstantSourceOptions,
20};
21use crate::dom::bindings::error::Fallible;
22use crate::dom::bindings::reflector::reflect_dom_object_with_proto;
23use crate::dom::bindings::root::{Dom, DomRoot};
24use crate::dom::window::Window;
25use crate::script_runtime::CanGc;
26
27#[dom_struct]
28pub(crate) struct ConstantSourceNode {
29    source_node: AudioScheduledSourceNode,
30    offset: Dom<AudioParam>,
31}
32
33impl ConstantSourceNode {
34    #[cfg_attr(crown, allow(crown::unrooted_must_root))]
35    fn new_inherited(
36        window: &Window,
37        context: &BaseAudioContext,
38        options: &ConstantSourceOptions,
39        can_gc: CanGc,
40    ) -> Fallible<ConstantSourceNode> {
41        let node_options = Default::default();
42        let offset = *options.offset;
43        let source_node = AudioScheduledSourceNode::new_inherited(
44            AudioNodeInit::ConstantSourceNode(options.convert()),
45            context,
46            node_options, /* 2, MAX, Speakers */
47            0,            /* inputs */
48            1,            /* outputs */
49        )?;
50        let node_id = source_node.node().node_id();
51        let offset = AudioParam::new(
52            window,
53            context,
54            node_id,
55            AudioNodeType::ConstantSourceNode,
56            ParamType::Offset,
57            AutomationRate::A_rate,
58            offset,
59            f32::MIN,
60            f32::MAX,
61            can_gc,
62        );
63
64        Ok(ConstantSourceNode {
65            source_node,
66            offset: Dom::from_ref(&offset),
67        })
68    }
69
70    pub(crate) fn new(
71        window: &Window,
72        context: &BaseAudioContext,
73        options: &ConstantSourceOptions,
74        can_gc: CanGc,
75    ) -> Fallible<DomRoot<ConstantSourceNode>> {
76        Self::new_with_proto(window, None, context, options, can_gc)
77    }
78
79    #[cfg_attr(crown, allow(crown::unrooted_must_root))]
80    fn new_with_proto(
81        window: &Window,
82        proto: Option<HandleObject>,
83        context: &BaseAudioContext,
84        options: &ConstantSourceOptions,
85        can_gc: CanGc,
86    ) -> Fallible<DomRoot<ConstantSourceNode>> {
87        let node = ConstantSourceNode::new_inherited(window, context, options, can_gc)?;
88        Ok(reflect_dom_object_with_proto(
89            Box::new(node),
90            window,
91            proto,
92            can_gc,
93        ))
94    }
95}
96
97impl ConstantSourceNodeMethods<crate::DomTypeHolder> for ConstantSourceNode {
98    // https://webaudio.github.io/web-audio-api/#dom-constantsourcenode-constantsourcenode
99    fn Constructor(
100        window: &Window,
101        proto: Option<HandleObject>,
102        can_gc: CanGc,
103        context: &BaseAudioContext,
104        options: &ConstantSourceOptions,
105    ) -> Fallible<DomRoot<ConstantSourceNode>> {
106        ConstantSourceNode::new_with_proto(window, proto, context, options, can_gc)
107    }
108
109    // https://webaudio.github.io/web-audio-api/#dom-constantsourcenode-offset
110    fn Offset(&self) -> DomRoot<AudioParam> {
111        DomRoot::from_ref(&self.offset)
112    }
113}
114
115impl Convert<ServoMediaConstantSourceOptions> for ConstantSourceOptions {
116    fn convert(self) -> ServoMediaConstantSourceOptions {
117        ServoMediaConstantSourceOptions {
118            offset: *self.offset,
119        }
120    }
121}
script/dom/audio/constantsourcenode.rs

script/dom/audio/
constantsourcenode.rs
