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/* 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::AudioNodeBinding::{AudioNodeMethods, AudioNodeOptions};
use dom::bindings::codegen::Bindings::AudioNodeBinding::{ChannelCountMode, ChannelInterpretation};
use dom::bindings::error::{Error, ErrorResult, Fallible};
use dom::bindings::root::{Dom, DomRoot};
use dom::audioparam::AudioParam;
use dom::eventtarget::EventTarget;
use dom_struct::dom_struct;
use servo_media::audio::graph::NodeId;
use servo_media::audio::node::{AudioNodeMessage, AudioNodeInit};
use std::cell::Cell;
// 32 is the minimum required by the spec for createBuffer() and the deprecated
// createScriptProcessor() and matches what is used by Blink and Gecko.
// The limit protects against large memory allocations.
pub const MAX_CHANNEL_COUNT: u32 = 32;
#[dom_struct]
pub struct AudioNode {
eventtarget: EventTarget,
#[ignore_malloc_size_of = "servo_media"]
node_id: NodeId,
context: Dom<BaseAudioContext>,
number_of_inputs: u32,
number_of_outputs: u32,
channel_count: Cell<u32>,
channel_count_mode: Cell<ChannelCountMode>,
channel_interpretation: Cell<ChannelInterpretation>,
}
impl AudioNode {
pub fn new_inherited(node_type: AudioNodeInit,
node_id: Option<NodeId>,
context: &BaseAudioContext,
options: &AudioNodeOptions,
number_of_inputs: u32,
number_of_outputs: u32) -> AudioNode {
let node_id = node_id.unwrap_or_else(|| {
context.audio_context_impl().create_node(node_type)
});
AudioNode {
eventtarget: EventTarget::new_inherited(),
node_id,
context: Dom::from_ref(context),
number_of_inputs,
number_of_outputs,
channel_count: Cell::new(options.channelCount.unwrap_or(2)),
channel_count_mode: Cell::new(options.channelCountMode.unwrap_or_default()),
channel_interpretation: Cell::new(options.channelInterpretation.unwrap_or_default()),
}
}
pub fn message(&self, message: AudioNodeMessage) {
self.context.audio_context_impl().message_node(self.node_id, message);
}
pub fn node_id(&self) -> NodeId {
self.node_id
}
}
impl AudioNodeMethods for AudioNode {
// https://webaudio.github.io/web-audio-api/#dom-audionode-connect
fn Connect(&self,
destination: &AudioNode,
output: u32,
input: u32) -> Fallible<DomRoot<AudioNode>> {
if self.context != destination.context {
return Err(Error::InvalidAccess);
}
if output >= self.NumberOfOutputs() ||
input >= destination.NumberOfInputs() {
return Err(Error::IndexSize);
}
self.context.audio_context_impl().connect_ports(
self.node_id().output(output), destination.node_id().input(input)
);
Ok(DomRoot::from_ref(destination))
}
fn Connect_(&self,
_: &AudioParam,
_: u32) -> Fallible<()> {
// TODO
Ok(())
}
// https://webaudio.github.io/web-audio-api/#dom-audionode-disconnect
fn Disconnect(&self) -> ErrorResult {
self.context.audio_context_impl()
.disconnect_all_from(self.node_id());
Ok(())
}
// https://webaudio.github.io/web-audio-api/#dom-audionode-disconnect-output
fn Disconnect_(&self, out: u32) -> ErrorResult {
self.context.audio_context_impl()
.disconnect_output(self.node_id().output(out));
Ok(())
}
// https://webaudio.github.io/web-audio-api/#dom-audionode-disconnect-destinationnode
fn Disconnect__(&self, to: &AudioNode) -> ErrorResult {
self.context.audio_context_impl()
.disconnect_between(self.node_id(), to.node_id());
Ok(())
}
// https://webaudio.github.io/web-audio-api/#dom-audionode-disconnect-destinationnode-output
fn Disconnect___(&self, to: &AudioNode, out: u32) -> ErrorResult{
self.context.audio_context_impl()
.disconnect_output_between(self.node_id().output(out), to.node_id());
Ok(())
}
// https://webaudio.github.io/web-audio-api/#dom-audionode-disconnect-destinationnode-output-input
fn Disconnect____(&self, to: &AudioNode, out: u32, inp: u32) -> ErrorResult {
self.context.audio_context_impl()
.disconnect_output_between_to(self.node_id().output(out), to.node_id().input(inp));
Ok(())
}
// https://webaudio.github.io/web-audio-api/#dom-audionode-disconnect
fn Disconnect_____(&self, _: &AudioParam) -> ErrorResult {
// TODO
Ok(())
}
// https://webaudio.github.io/web-audio-api/#dom-audionode-disconnect
fn Disconnect______(&self, _: &AudioParam, _: u32) -> ErrorResult {
// TODO
Ok(())
}
// https://webaudio.github.io/web-audio-api/#dom-audionode-context
fn Context(&self) -> DomRoot<BaseAudioContext> {
DomRoot::from_ref(&self.context)
}
// https://webaudio.github.io/web-audio-api/#dom-audionode-numberofinputs
fn NumberOfInputs(&self) -> u32 {
self.number_of_inputs
}
// https://webaudio.github.io/web-audio-api/#dom-audionode-numberofoutputs
fn NumberOfOutputs(&self) -> u32 {
self.number_of_outputs
}
// https://webaudio.github.io/web-audio-api/#dom-audionode-channelcount
fn ChannelCount(&self) -> u32 {
self.channel_count.get()
}
fn SetChannelCount(&self, value: u32) -> ErrorResult {
if value == 0 || value > MAX_CHANNEL_COUNT {
return Err(Error::NotSupported);
}
self.channel_count.set(value);
Ok(())
}
fn ChannelCountMode(&self) -> ChannelCountMode {
self.channel_count_mode.get()
}
fn SetChannelCountMode(&self, value: ChannelCountMode) -> ErrorResult {
self.channel_count_mode.set(value);
Ok(())
}
fn ChannelInterpretation(&self) -> ChannelInterpretation {
self.channel_interpretation.get()
}
fn SetChannelInterpretation(&self, value: ChannelInterpretation) {
self.channel_interpretation.set(value);
}
}
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