Add PannerNode DOM interface

1 files changed, 210 insertions, 0 deletions

diff --git a/components/script/dom/pannernode.rs b/components/script/dom/pannernode.rs
new file mode 100644
index 00000000000..cfb59578f31
--- /dev/null
+++ b/components/script/dom/pannernode.rs
@@ -0,0 +1,210 @@
+/* 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::audionode::AudioNode;
+use dom::audioparam::AudioParam;
+use dom::baseaudiocontext::BaseAudioContext;
+use dom::bindings::codegen::Bindings::AudioNodeBinding::{ChannelCountMode, ChannelInterpretation};
+use dom::bindings::codegen::Bindings::AudioNodeBinding::AudioNodeOptions;
+use dom::bindings::codegen::Bindings::AudioParamBinding::AutomationRate;
+use dom::bindings::codegen::Bindings::PannerNodeBinding::{self, PannerNodeMethods, PannerOptions};
+use dom::bindings::codegen::Bindings::PannerNodeBinding::{DistanceModelType, PanningModelType};
+use dom::bindings::error::Fallible;
+use dom::bindings::reflector::reflect_dom_object;
+use dom::bindings::root::{Dom, DomRoot};
+use dom::window::Window;
+use dom_struct::dom_struct;
+use servo_media::audio::panner_node::{DistanceModel, PannerNodeOptions, PanningModel};
+use servo_media::audio::node::AudioNodeInit;
+use servo_media::audio::param::{ParamDir, ParamType};
+use std::f32;
+
+#[dom_struct]
+pub struct PannerNode {
+    node: AudioNode,
+    position_x: Dom<AudioParam>,
+    position_y: Dom<AudioParam>,
+    position_z: Dom<AudioParam>,
+    orientation_x: Dom<AudioParam>,
+    orientation_y: Dom<AudioParam>,
+    orientation_z: Dom<AudioParam>,
+}
+
+impl PannerNode {
+    #[allow(unrooted_must_root)]
+    pub fn new_inherited(
+        window: &Window,
+        context: &BaseAudioContext,
+        options: &PannerOptions,
+    ) -> PannerNode {
+        let mut node_options = AudioNodeOptions::empty();
+        node_options.channelCount = Some(2);
+        node_options.channelCountMode = Some(ChannelCountMode::Clamped_max);
+        node_options.channelInterpretation = Some(ChannelInterpretation::Speakers);
+        let options = options.into();
+        let node = AudioNode::new_inherited(
+            AudioNodeInit::PannerNode(options),
+            context,
+            &node_options,
+            1, // inputs
+            1, // outputs
+        );
+        let id = node.node_id();
+        let position_x = AudioParam::new(
+            window,
+            context,
+            id,
+            ParamType::Position(ParamDir::X),
+            AutomationRate::A_rate,
+            options.position_x,       // default value
+            f32::MIN, // min value
+            f32::MAX, // max value
+        );
+        let position_y = AudioParam::new(
+            window,
+            context,
+            id,
+            ParamType::Position(ParamDir::Y),
+            AutomationRate::A_rate,
+            options.position_y,       // default value
+            f32::MIN, // min value
+            f32::MAX, // max value
+        );
+        let position_z = AudioParam::new(
+            window,
+            context,
+            id,
+            ParamType::Position(ParamDir::Z),
+            AutomationRate::A_rate,
+            options.position_z,       // default value
+            f32::MIN, // min value
+            f32::MAX, // max value
+        );
+        let orientation_x = AudioParam::new(
+            window,
+            context,
+            id,
+            ParamType::Orientation(ParamDir::X),
+            AutomationRate::A_rate,
+            options.orientation_x,       // default value
+            f32::MIN, // min value
+            f32::MAX, // max value
+        );
+        let orientation_y = AudioParam::new(
+            window,
+            context,
+            id,
+            ParamType::Orientation(ParamDir::Y),
+            AutomationRate::A_rate,
+            options.orientation_y,       // default value
+            f32::MIN, // min value
+            f32::MAX, // max value
+        );
+        let orientation_z = AudioParam::new(
+            window,
+            context,
+            id,
+            ParamType::Orientation(ParamDir::Z),
+            AutomationRate::A_rate,
+            options.orientation_z,       // default value
+            f32::MIN, // min value
+            f32::MAX, // max value
+        );
+        PannerNode {
+            node,
+            position_x: Dom::from_ref(&position_x),
+            position_y: Dom::from_ref(&position_y),
+            position_z: Dom::from_ref(&position_z),
+            orientation_x: Dom::from_ref(&orientation_x),
+            orientation_y: Dom::from_ref(&orientation_y),
+            orientation_z: Dom::from_ref(&orientation_z),
+        }
+    }
+
+    #[allow(unrooted_must_root)]
+    pub fn new(
+        window: &Window,
+        context: &BaseAudioContext,
+        options: &PannerOptions,
+    ) -> DomRoot<PannerNode> {
+        let node = PannerNode::new_inherited(window, context, options);
+        reflect_dom_object(Box::new(node), window, PannerNodeBinding::Wrap)
+    }
+
+    pub fn Constructor(
+        window: &Window,
+        context: &BaseAudioContext,
+        options: &PannerOptions,
+    ) -> Fallible<DomRoot<PannerNode>> {
+        Ok(PannerNode::new(window, context, options))
+    }
+}
+
+impl PannerNodeMethods for PannerNode {
+    // https://webaudio.github.io/web-audio-api/#dom-pannernode-positionx
+    fn PositionX(&self) -> DomRoot<AudioParam> {
+        DomRoot::from_ref(&self.position_x)
+    }
+    // https://webaudio.github.io/web-audio-api/#dom-pannernode-positiony
+    fn PositionY(&self) -> DomRoot<AudioParam> {
+        DomRoot::from_ref(&self.position_y)
+    }
+    // https://webaudio.github.io/web-audio-api/#dom-pannernode-positionz
+    fn PositionZ(&self) -> DomRoot<AudioParam> {
+        DomRoot::from_ref(&self.position_z)
+    }
+
+    // https://webaudio.github.io/web-audio-api/#dom-pannernode-orientationx
+    fn OrientationX(&self) -> DomRoot<AudioParam> {
+        DomRoot::from_ref(&self.orientation_x)
+    }
+    // https://webaudio.github.io/web-audio-api/#dom-pannernode-orientationy
+    fn OrientationY(&self) -> DomRoot<AudioParam> {
+        DomRoot::from_ref(&self.orientation_y)
+    }
+    // https://webaudio.github.io/web-audio-api/#dom-pannernode-orientationz
+    fn OrientationZ(&self) -> DomRoot<AudioParam> {
+        DomRoot::from_ref(&self.orientation_z)
+    }
+}
+
+impl<'a> From<&'a PannerOptions> for PannerNodeOptions {
+    fn from(options: &'a PannerOptions) -> Self {
+        Self {
+            panning_model: options.panningModel.into(),
+            distance_model: options.distanceModel.into(),
+            position_x: *options.positionX,
+            position_y: *options.positionY,
+            position_z: *options.positionZ,
+            orientation_x: *options.orientationX,
+            orientation_y: *options.orientationY,
+            orientation_z: *options.orientationZ,
+            ref_distance: *options.refDistance,
+            max_distance: *options.maxDistance,
+            rolloff_factor: *options.rolloffFactor,
+            cone_inner_angle: *options.coneInnerAngle,
+            cone_outer_angle: *options.coneOuterAngle,
+            cone_outer_gain: *options.coneOuterGain,
+        }
+    }
+}
+
+impl From<DistanceModelType> for DistanceModel {
+    fn from(model: DistanceModelType) -> Self {
+        match model {
+            DistanceModelType::Linear => DistanceModel::Linear,
+            DistanceModelType::Inverse => DistanceModel::Inverse,
+            DistanceModelType::Exponential => DistanceModel::Exponential,
+        }
+    }
+}
+
+impl From<PanningModelType> for PanningModel {
+    fn from(model: PanningModelType) -> Self {
+        match model {
+            PanningModelType::Equalpower => PanningModel::EqualPower,
+            PanningModelType::HRTF => PanningModel::HRTF,
+        }
+    }
+}