Initial WebAudio API stubs

components/script/dom/audiocontext.rs

@@ -0,0 +1,81 @@
+/* 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 http://mozilla.org/MPL/2.0/. */
+
+use dom::baseaudiocontext::BaseAudioContext;
+use dom::bindings::codegen::Bindings::AudioContextBinding;
+use dom::bindings::codegen::Bindings::AudioContextBinding::AudioContextMethods;
+use dom::bindings::codegen::Bindings::AudioContextBinding::{AudioContextOptions, AudioTimestamp};
+use dom::bindings::error::Fallible;
+use dom::bindings::inheritance::Castable;
+use dom::bindings::num::Finite;
+use dom::bindings::reflector::{DomObject, reflect_dom_object};
+use dom::bindings::root::DomRoot;
+use dom::globalscope::GlobalScope;
+use dom::promise::Promise;
+use dom::window::Window;
+use dom_struct::dom_struct;
+use std::rc::Rc;
+
+#[dom_struct]
+pub struct AudioContext {
+    context: BaseAudioContext,
+    base_latency: f64,
+    output_latency: f64,
+}
+
+impl AudioContext {
+    fn new_inherited(global: &GlobalScope, sample_rate: f32) -> AudioContext {
+        AudioContext {
+            context: BaseAudioContext::new_inherited(global, 2 /* channel_count */, sample_rate),
+            base_latency: 0., // TODO
+            output_latency: 0., // TODO
+        }
+    }
+
+    #[allow(unrooted_must_root)]
+    pub fn new(global: &GlobalScope,
+               options: &AudioContextOptions) -> DomRoot<AudioContext> {
+        let context = AudioContext::new_inherited(
+            global,
+            *options.sampleRate.unwrap_or(Finite::wrap(0.)),
+            ); // TODO
+        reflect_dom_object(Box::new(context), global, AudioContextBinding::Wrap)
+    }
+
+    pub fn Constructor(window: &Window,
+                       options: &AudioContextOptions) -> Fallible<DomRoot<AudioContext>> {
+        let global = window.upcast::<GlobalScope>();
+        Ok(AudioContext::new(global, options))
+    }
+}
+
+impl AudioContextMethods for AudioContext {
+    fn BaseLatency(&self) -> Finite<f64> {
+        Finite::wrap(self.base_latency)
+    }
+
+    fn OutputLatency(&self) -> Finite<f64> {
+        Finite::wrap(self.output_latency)
+    }
+
+    fn GetOutputTimestamp(&self) -> AudioTimestamp {
+        // TODO
+        AudioTimestamp {
+            contextTime: Some(Finite::wrap(0.)),
+            performanceTime: Some(Finite::wrap(0.)),
+        }
+    }
+
+    #[allow(unrooted_must_root)]
+    fn Suspend(&self) -> Rc<Promise> {
+        // TODO
+        Promise::new(&self.global())
+    }
+
+    #[allow(unrooted_must_root)]
+    fn Close(&self) -> Rc<Promise> {
+        // TODO
+        Promise::new(&self.global())
+    }
+}