script: Move webaudio DOM interfaces to script/dom/audio/ (#38894)

Moves interfaces defined by the webaudio spec (27 files) to the new
`script/dom/audio/` module from the `script/dom/` module.

Testing: Just a refactor shouldn't need any testing
Fixes: N/A

Signed-off-by: Ashwin Naren <arihant2math@gmail.com>

components/script/dom/audio/mediastreamaudiosourcenode.rs

@@ -0,0 +1,103 @@
+/* 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;
+use servo_media::streams::MediaStreamType;
+
+use crate::dom::audio::audiocontext::AudioContext;
+use crate::dom::audio::audionode::AudioNode;
+use crate::dom::bindings::codegen::Bindings::MediaStreamAudioSourceNodeBinding::{
+    MediaStreamAudioSourceNodeMethods, MediaStreamAudioSourceOptions,
+};
+use crate::dom::bindings::error::{Error, Fallible};
+use crate::dom::bindings::inheritance::Castable;
+use crate::dom::bindings::reflector::reflect_dom_object_with_proto;
+use crate::dom::bindings::root::{Dom, DomRoot};
+use crate::dom::mediastream::MediaStream;
+use crate::dom::window::Window;
+use crate::script_runtime::CanGc;
+
+#[dom_struct]
+pub(crate) struct MediaStreamAudioSourceNode {
+    node: AudioNode,
+    stream: Dom<MediaStream>,
+}
+
+impl MediaStreamAudioSourceNode {
+    #[cfg_attr(crown, allow(crown::unrooted_must_root))]
+    pub(crate) fn new_inherited(
+        context: &AudioContext,
+        stream: &MediaStream,
+    ) -> Fallible<MediaStreamAudioSourceNode> {
+        let track = stream
+            .get_tracks()
+            .iter()
+            .find(|t| t.ty() == MediaStreamType::Audio)
+            .ok_or(Error::InvalidState)?
+            .id();
+        let node = AudioNode::new_inherited(
+            AudioNodeInit::MediaStreamSourceNode(track),
+            context.upcast(),
+            Default::default(),
+            0, // inputs
+            1, // outputs
+        )?;
+        Ok(MediaStreamAudioSourceNode {
+            node,
+            stream: Dom::from_ref(stream),
+        })
+    }
+
+    pub(crate) fn new(
+        window: &Window,
+        context: &AudioContext,
+        stream: &MediaStream,
+        can_gc: CanGc,
+    ) -> Fallible<DomRoot<MediaStreamAudioSourceNode>> {
+        Self::new_with_proto(window, None, context, stream, can_gc)
+    }
+
+    #[cfg_attr(crown, allow(crown::unrooted_must_root))]
+    fn new_with_proto(
+        window: &Window,
+        proto: Option<HandleObject>,
+        context: &AudioContext,
+        stream: &MediaStream,
+        can_gc: CanGc,
+    ) -> Fallible<DomRoot<MediaStreamAudioSourceNode>> {
+        let node = MediaStreamAudioSourceNode::new_inherited(context, stream)?;
+        Ok(reflect_dom_object_with_proto(
+            Box::new(node),
+            window,
+            proto,
+            can_gc,
+        ))
+    }
+}
+
+impl MediaStreamAudioSourceNodeMethods<crate::DomTypeHolder> for MediaStreamAudioSourceNode {
+    /// <https://webaudio.github.io/web-audio-api/#dom-mediastreamaudiosourcenode-mediastreamaudiosourcenode>
+    fn Constructor(
+        window: &Window,
+        proto: Option<HandleObject>,
+        can_gc: CanGc,
+        context: &AudioContext,
+        options: &MediaStreamAudioSourceOptions,
+    ) -> Fallible<DomRoot<MediaStreamAudioSourceNode>> {
+        MediaStreamAudioSourceNode::new_with_proto(
+            window,
+            proto,
+            context,
+            &options.mediaStream,
+            can_gc,
+        )
+    }
+
+    /// <https://webaudio.github.io/web-audio-api/#dom-MediaStreamAudioSourceNode-stream>
+    fn MediaStream(&self) -> DomRoot<MediaStream> {
+        DomRoot::from_ref(&self.stream)
+    }
+}