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AnalyserNode in script
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4 changed files with 249 additions and 1 deletions
218
components/script/dom/analysernode.rs
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218
components/script/dom/analysernode.rs
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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use dom::audionode::AudioNode;
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use dom::baseaudiocontext::BaseAudioContext;
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use dom::bindings::cell::DomRefCell;
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use dom::bindings::codegen::Bindings::AnalyserNodeBinding::{self, AnalyserNodeMethods, AnalyserOptions};
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use dom::bindings::codegen::Bindings::AudioNodeBinding::{ChannelCountMode, ChannelInterpretation};
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use dom::bindings::error::{Error, Fallible};
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use dom::bindings::num::Finite;
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use dom::bindings::refcounted::Trusted;
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use dom::bindings::reflector::reflect_dom_object;
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use dom::bindings::root::DomRoot;
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use dom::window::Window;
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use dom_struct::dom_struct;
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use ipc_channel::ipc::{self, IpcReceiver};
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use ipc_channel::router::ROUTER;
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use js::rust::CustomAutoRooterGuard;
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use js::typedarray::{Float32Array, Uint8Array};
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use servo_media::audio::analyser_node::AnalysisEngine;
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use servo_media::audio::block::Block;
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use servo_media::audio::node::AudioNodeInit;
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use task_source::{TaskSource, TaskSourceName};
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#[dom_struct]
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pub struct AnalyserNode {
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node: AudioNode,
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#[ignore_malloc_size_of = "Defined in servo-media"]
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engine: DomRefCell<AnalysisEngine>,
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}
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impl AnalyserNode {
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#[allow(unrooted_must_root)]
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pub fn new_inherited(
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_: &Window,
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context: &BaseAudioContext,
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options: &AnalyserOptions,
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) -> Fallible<(AnalyserNode, IpcReceiver<Block>)> {
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let node_options = options.parent
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.unwrap_or(1, ChannelCountMode::Max,
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ChannelInterpretation::Speakers);
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if options.fftSize > 32768 || options.fftSize < 32 ||
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(options.fftSize & (options.fftSize - 1) != 0) {
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return Err(Error::IndexSize)
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}
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if *options.maxDecibels <= *options.minDecibels {
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return Err(Error::IndexSize)
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}
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if *options.smoothingTimeConstant < 0. || *options.smoothingTimeConstant > 1. {
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return Err(Error::IndexSize);
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}
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let (send, rcv) = ipc::channel().unwrap();
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let callback = move |block| {
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send.send(block).unwrap();
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};
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let node = AudioNode::new_inherited(
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AudioNodeInit::AnalyserNode(Box::new(callback)),
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context,
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node_options,
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1, // inputs
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1, // outputs
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)?;
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let engine = AnalysisEngine::new(options.fftSize as usize,
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*options.smoothingTimeConstant,
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*options.minDecibels, *options.maxDecibels);
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Ok((AnalyserNode {
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node,
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engine: DomRefCell::new(engine)
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}, rcv))
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}
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#[allow(unrooted_must_root)]
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pub fn new(
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window: &Window,
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context: &BaseAudioContext,
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options: &AnalyserOptions,
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) -> Fallible<DomRoot<AnalyserNode>> {
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let (node, recv) = AnalyserNode::new_inherited(window, context, options)?;
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let object = reflect_dom_object(Box::new(node), window, AnalyserNodeBinding::Wrap);
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let source = window.dom_manipulation_task_source();
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let canceller = window.task_canceller(TaskSourceName::DOMManipulation);
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let this = Trusted::new(&*object);
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ROUTER.add_route(recv.to_opaque(), Box::new(move |block| {
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let this = this.clone();
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let _ = source.queue_with_canceller(task!(append_analysis_block: move || {
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let this = this.root();
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this.push_block(block.to().unwrap())
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}), &canceller);
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}));
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Ok(object)
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}
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/// https://webaudio.github.io/web-audio-api/#dom-analysernode-analysernode
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pub fn Constructor(
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window: &Window,
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context: &BaseAudioContext,
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options: &AnalyserOptions,
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) -> Fallible<DomRoot<AnalyserNode>> {
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AnalyserNode::new(window, context, options)
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}
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pub fn push_block(&self, block: Block) {
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self.engine.borrow_mut().push(block)
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}
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}
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impl AnalyserNodeMethods for AnalyserNode {
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#[allow(unsafe_code)]
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/// https://webaudio.github.io/web-audio-api/#dom-analysernode-getfloatfrequencydata
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fn GetFloatFrequencyData(&self, mut array: CustomAutoRooterGuard<Float32Array>) {
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// Invariant to maintain: No JS code that may touch the array should
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// run whilst we're writing to it
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let dest = unsafe { array.as_mut_slice() };
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self.engine.borrow_mut().fill_frequency_data(dest);
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}
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#[allow(unsafe_code)]
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/// https://webaudio.github.io/web-audio-api/#dom-analysernode-getbytefrequencydata
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fn GetByteFrequencyData(&self, mut array: CustomAutoRooterGuard<Uint8Array>) {
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// Invariant to maintain: No JS code that may touch the array should
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// run whilst we're writing to it
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let dest = unsafe { array.as_mut_slice() };
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self.engine.borrow_mut().fill_byte_frequency_data(dest);
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}
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#[allow(unsafe_code)]
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/// https://webaudio.github.io/web-audio-api/#dom-analysernode-getfloattimedomaindata
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fn GetFloatTimeDomainData(&self, mut array: CustomAutoRooterGuard<Float32Array>) {
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// Invariant to maintain: No JS code that may touch the array should
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// run whilst we're writing to it
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let dest = unsafe { array.as_mut_slice() };
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self.engine.borrow().fill_time_domain_data(dest);
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}
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#[allow(unsafe_code)]
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/// https://webaudio.github.io/web-audio-api/#dom-analysernode-getbytetimedomaindata
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fn GetByteTimeDomainData(&self, mut array: CustomAutoRooterGuard<Uint8Array>) {
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// Invariant to maintain: No JS code that may touch the array should
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// run whilst we're writing to it
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let dest = unsafe { array.as_mut_slice() };
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self.engine.borrow().fill_byte_time_domain_data(dest);
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}
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/// https://webaudio.github.io/web-audio-api/#dom-analysernode-fftsize
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fn SetFftSize(&self, value: u32) -> Fallible<()> {
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if value > 32768 || value < 32 ||
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(value & (value - 1) != 0) {
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return Err(Error::IndexSize)
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}
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self.engine.borrow_mut().set_fft_size(value as usize);
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Ok(())
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}
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/// https://webaudio.github.io/web-audio-api/#dom-analysernode-fftsize
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fn FftSize(&self) -> u32 {
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self.engine.borrow().get_fft_size() as u32
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}
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/// https://webaudio.github.io/web-audio-api/#dom-analysernode-frequencybincount
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fn FrequencyBinCount(&self) -> u32 {
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self.FftSize() / 2
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}
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/// https://webaudio.github.io/web-audio-api/#dom-analysernode-mindecibels
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fn MinDecibels(&self) -> Finite<f64> {
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Finite::wrap(self.engine.borrow().get_min_decibels())
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}
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/// https://webaudio.github.io/web-audio-api/#dom-analysernode-mindecibels
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fn SetMinDecibels(&self, value: Finite<f64>) -> Fallible<()> {
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if *value >= self.engine.borrow().get_max_decibels() {
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return Err(Error::IndexSize)
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}
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self.engine.borrow_mut().set_min_decibels(*value);
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Ok(())
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}
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/// https://webaudio.github.io/web-audio-api/#dom-analysernode-maxdecibels
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fn MaxDecibels(&self) -> Finite<f64> {
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Finite::wrap(self.engine.borrow().get_max_decibels())
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}
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/// https://webaudio.github.io/web-audio-api/#dom-analysernode-maxdecibels
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fn SetMaxDecibels(&self, value: Finite<f64>) -> Fallible<()> {
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if *value <= self.engine.borrow().get_min_decibels() {
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return Err(Error::IndexSize)
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}
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self.engine.borrow_mut().set_max_decibels(*value);
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Ok(())
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}
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/// https://webaudio.github.io/web-audio-api/#dom-analysernode-smoothingtimeconstant
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fn SmoothingTimeConstant(&self) -> Finite<f64> {
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Finite::wrap(self.engine.borrow().get_smoothing_constant())
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}
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/// https://webaudio.github.io/web-audio-api/#dom-analysernode-smoothingtimeconstant
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fn SetSmoothingTimeConstant(&self, value: Finite<f64>) -> Fallible<()> {
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if *value < 0. || *value > 1. {
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return Err(Error::IndexSize)
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}
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self.engine.borrow_mut().set_smoothing_constant(*value);
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Ok(())
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}
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}
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@ -90,6 +90,7 @@ use servo_arc::Arc as ServoArc;
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use servo_atoms::Atom;
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use servo_channel::{Receiver, Sender};
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use servo_media::Backend;
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use servo_media::audio::analyser_node::AnalysisEngine;
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use servo_media::audio::buffer_source_node::AudioBuffer;
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use servo_media::audio::context::AudioContext;
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use servo_media::audio::graph::NodeId;
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unsafe_no_jsmanaged_fields!(AudioBuffer);
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unsafe_no_jsmanaged_fields!(AudioContext<Backend>);
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unsafe_no_jsmanaged_fields!(NodeId);
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unsafe_no_jsmanaged_fields!(DistanceModel, PanningModel, ParamType);
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unsafe_no_jsmanaged_fields!(AnalysisEngine, DistanceModel, PanningModel, ParamType);
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unsafe impl<'a> JSTraceable for &'a str {
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#[inline]
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@ -215,6 +215,7 @@ pub mod types {
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pub mod abstractworker;
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pub mod abstractworkerglobalscope;
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pub mod activation;
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pub mod analysernode;
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pub mod attr;
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pub mod audiobuffer;
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pub mod audiobuffersourcenode;
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28
components/script/dom/webidls/AnalyserNode.webidl
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28
components/script/dom/webidls/AnalyserNode.webidl
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/*
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* The origin of this IDL file is
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* https://webaudio.github.io/web-audio-api/#analysernode
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*/
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dictionary AnalyserOptions : AudioNodeOptions {
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unsigned long fftSize = 2048;
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double maxDecibels = -30;
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double minDecibels = -100;
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double smoothingTimeConstant = 0.8;
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};
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[Exposed=Window,
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Constructor (BaseAudioContext context, optional AnalyserOptions options)]
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interface AnalyserNode : AudioNode {
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void getFloatFrequencyData (Float32Array array);
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void getByteFrequencyData (Uint8Array array);
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void getFloatTimeDomainData (Float32Array array);
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void getByteTimeDomainData (Uint8Array array);
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[SetterThrows] attribute unsigned long fftSize;
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readonly attribute unsigned long frequencyBinCount;
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[SetterThrows] attribute double minDecibels;
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[SetterThrows] attribute double maxDecibels;
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[SetterThrows] attribute double smoothingTimeConstant;
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};
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