script/dom/audio/
channelmergernode.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 dom_struct::dom_struct;
6use js::context::JSContext;
7use js::rust::HandleObject;
8use script_bindings::reflector::reflect_dom_object_with_proto_and_cx;
9use servo_media::audio::channel_node::ChannelNodeOptions;
10use servo_media::audio::node::AudioNodeInit;
11
12use crate::conversions::Convert;
13use crate::dom::audio::audionode::{AudioNode, AudioNodeOptionsHelper, MAX_CHANNEL_COUNT};
14use crate::dom::audio::baseaudiocontext::BaseAudioContext;
15use crate::dom::bindings::codegen::Bindings::AudioNodeBinding::{
16    ChannelCountMode, ChannelInterpretation,
17};
18use crate::dom::bindings::codegen::Bindings::ChannelMergerNodeBinding::{
19    ChannelMergerNodeMethods, ChannelMergerOptions,
20};
21use crate::dom::bindings::error::{Error, Fallible};
22use crate::dom::bindings::root::DomRoot;
23use crate::dom::window::Window;
24
25#[dom_struct]
26pub(crate) struct ChannelMergerNode {
27    node: AudioNode,
28}
29
30impl ChannelMergerNode {
31    #[cfg_attr(crown, expect(crown::unrooted_must_root))]
32    pub(crate) fn new_inherited(
33        cx: &mut JSContext,
34        _: &Window,
35        context: &BaseAudioContext,
36        options: &ChannelMergerOptions,
37    ) -> Fallible<ChannelMergerNode> {
38        let node_options = options.parent.unwrap_or(
39            1,
40            ChannelCountMode::Explicit,
41            ChannelInterpretation::Speakers,
42        );
43
44        if node_options.count != 1 || node_options.mode != ChannelCountMode::Explicit {
45            return Err(Error::InvalidState(None));
46        }
47
48        if options.numberOfInputs < 1 || options.numberOfInputs > MAX_CHANNEL_COUNT {
49            return Err(Error::IndexSize(None));
50        }
51
52        let num_inputs = options.numberOfInputs;
53        let node = AudioNode::new_inherited(
54            cx,
55            AudioNodeInit::ChannelMergerNode(options.convert()),
56            context,
57            node_options,
58            num_inputs, // inputs
59            1,          // outputs
60        )?;
61        Ok(ChannelMergerNode { node })
62    }
63
64    pub(crate) fn new(
65        cx: &mut JSContext,
66        window: &Window,
67        context: &BaseAudioContext,
68        options: &ChannelMergerOptions,
69    ) -> Fallible<DomRoot<ChannelMergerNode>> {
70        Self::new_with_proto(cx, window, None, context, options)
71    }
72
73    #[cfg_attr(crown, expect(crown::unrooted_must_root))]
74    fn new_with_proto(
75        cx: &mut JSContext,
76        window: &Window,
77        proto: Option<HandleObject>,
78        context: &BaseAudioContext,
79        options: &ChannelMergerOptions,
80    ) -> Fallible<DomRoot<ChannelMergerNode>> {
81        let node = ChannelMergerNode::new_inherited(cx, window, context, options)?;
82        Ok(reflect_dom_object_with_proto_and_cx(
83            Box::new(node),
84            window,
85            proto,
86            cx,
87        ))
88    }
89}
90
91impl ChannelMergerNodeMethods<crate::DomTypeHolder> for ChannelMergerNode {
92    /// <https://webaudio.github.io/web-audio-api/#dom-channelmergernode-channelmergernode>
93    fn Constructor(
94        cx: &mut JSContext,
95        window: &Window,
96        proto: Option<HandleObject>,
97        context: &BaseAudioContext,
98        options: &ChannelMergerOptions,
99    ) -> Fallible<DomRoot<ChannelMergerNode>> {
100        ChannelMergerNode::new_with_proto(cx, window, proto, context, options)
101    }
102}
103
104impl Convert<ChannelNodeOptions> for ChannelMergerOptions {
105    fn convert(self) -> ChannelNodeOptions {
106        ChannelNodeOptions {
107            channels: self.numberOfInputs as u8,
108        }
109    }
110}
script/dom/audio/channelmergernode.rs

script/dom/audio/
channelmergernode.rs
