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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/. */ | |||
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use dom::audionode::AudioNode; | |||
use dom::baseaudiocontext::BaseAudioContext; | |||
use dom::bindings::cell::DomRefCell; | |||
use dom::bindings::codegen::Bindings::AnalyserNodeBinding::{self, AnalyserNodeMethods, AnalyserOptions}; | |||
use dom::bindings::codegen::Bindings::AudioNodeBinding::{ChannelCountMode, ChannelInterpretation}; | |||
use dom::bindings::error::{Error, Fallible}; | |||
use dom::bindings::num::Finite; | |||
use dom::bindings::refcounted::Trusted; | |||
use dom::bindings::reflector::reflect_dom_object; | |||
use dom::bindings::root::DomRoot; | |||
use dom::window::Window; | |||
use dom_struct::dom_struct; | |||
use ipc_channel::ipc::{self, IpcReceiver}; | |||
use ipc_channel::router::ROUTER; | |||
use js::rust::CustomAutoRooterGuard; | |||
use js::typedarray::{Float32Array, Uint8Array}; | |||
use servo_media::audio::analyser_node::AnalysisEngine; | |||
use servo_media::audio::block::Block; | |||
use servo_media::audio::node::AudioNodeInit; | |||
use task_source::{TaskSource, TaskSourceName}; | |||
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#[dom_struct] | |||
pub struct AnalyserNode { | |||
node: AudioNode, | |||
#[ignore_malloc_size_of = "Defined in servo-media"] | |||
engine: DomRefCell<AnalysisEngine>, | |||
} | |||
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impl AnalyserNode { | |||
#[allow(unrooted_must_root)] | |||
pub fn new_inherited( | |||
_: &Window, | |||
context: &BaseAudioContext, | |||
options: &AnalyserOptions, | |||
) -> Fallible<(AnalyserNode, IpcReceiver<Block>)> { | |||
let node_options = options.parent | |||
.unwrap_or(1, ChannelCountMode::Max, | |||
ChannelInterpretation::Speakers); | |||
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if options.fftSize > 32768 || options.fftSize < 32 || | |||
(options.fftSize & (options.fftSize - 1) != 0) { | |||
return Err(Error::IndexSize) | |||
} | |||
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if *options.maxDecibels <= *options.minDecibels { | |||
return Err(Error::IndexSize) | |||
} | |||
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if *options.smoothingTimeConstant < 0. || *options.smoothingTimeConstant > 1. { | |||
return Err(Error::IndexSize); | |||
} | |||
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let (send, rcv) = ipc::channel().unwrap(); | |||
let callback = move |block| { | |||
send.send(block).unwrap(); | |||
}; | |||
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let node = AudioNode::new_inherited( | |||
AudioNodeInit::AnalyserNode(Box::new(callback)), | |||
context, | |||
node_options, | |||
1, // inputs | |||
1, // outputs | |||
)?; | |||
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let engine = AnalysisEngine::new(options.fftSize as usize, | |||
*options.smoothingTimeConstant, | |||
*options.minDecibels, *options.maxDecibels); | |||
Ok((AnalyserNode { | |||
node, | |||
engine: DomRefCell::new(engine) | |||
}, rcv)) | |||
} | |||
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#[allow(unrooted_must_root)] | |||
pub fn new( | |||
window: &Window, | |||
context: &BaseAudioContext, | |||
options: &AnalyserOptions, | |||
) -> Fallible<DomRoot<AnalyserNode>> { | |||
let (node, recv) = AnalyserNode::new_inherited(window, context, options)?; | |||
let object = reflect_dom_object(Box::new(node), window, AnalyserNodeBinding::Wrap); | |||
let source = window.dom_manipulation_task_source(); | |||
let canceller = window.task_canceller(TaskSourceName::DOMManipulation); | |||
let this = Trusted::new(&*object); | |||
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ROUTER.add_route(recv.to_opaque(), Box::new(move |block| { | |||
let this = this.clone(); | |||
let _ = source.queue_with_canceller(task!(append_analysis_block: move || { | |||
let this = this.root(); | |||
this.push_block(block.to().unwrap()) | |||
}), &canceller); | |||
})); | |||
Ok(object) | |||
} | |||
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/// https://webaudio.github.io/web-audio-api/#dom-analysernode-analysernode | |||
pub fn Constructor( | |||
window: &Window, | |||
context: &BaseAudioContext, | |||
options: &AnalyserOptions, | |||
) -> Fallible<DomRoot<AnalyserNode>> { | |||
AnalyserNode::new(window, context, options) | |||
} | |||
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pub fn push_block(&self, block: Block) { | |||
self.engine.borrow_mut().push(block) | |||
} | |||
} | |||
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impl AnalyserNodeMethods for AnalyserNode { | |||
#[allow(unsafe_code)] | |||
/// https://webaudio.github.io/web-audio-api/#dom-analysernode-getfloatfrequencydata | |||
fn GetFloatFrequencyData(&self, mut array: CustomAutoRooterGuard<Float32Array>) { | |||
// Invariant to maintain: No JS code that may touch the array should | |||
// run whilst we're writing to it | |||
let dest = unsafe { array.as_mut_slice() }; | |||
self.engine.borrow_mut().fill_frequency_data(dest); | |||
} | |||
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#[allow(unsafe_code)] | |||
/// https://webaudio.github.io/web-audio-api/#dom-analysernode-getbytefrequencydata | |||
fn GetByteFrequencyData(&self, mut array: CustomAutoRooterGuard<Uint8Array>) { | |||
// Invariant to maintain: No JS code that may touch the array should | |||
// run whilst we're writing to it | |||
let dest = unsafe { array.as_mut_slice() }; | |||
self.engine.borrow_mut().fill_byte_frequency_data(dest); | |||
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} | |||
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#[allow(unsafe_code)] | |||
/// https://webaudio.github.io/web-audio-api/#dom-analysernode-getfloattimedomaindata | |||
fn GetFloatTimeDomainData(&self, mut array: CustomAutoRooterGuard<Float32Array>) { | |||
// Invariant to maintain: No JS code that may touch the array should | |||
// run whilst we're writing to it | |||
let dest = unsafe { array.as_mut_slice() }; | |||
self.engine.borrow().fill_time_domain_data(dest); | |||
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} | |||
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#[allow(unsafe_code)] | |||
/// https://webaudio.github.io/web-audio-api/#dom-analysernode-getbytetimedomaindata | |||
fn GetByteTimeDomainData(&self, mut array: CustomAutoRooterGuard<Uint8Array>) { | |||
// Invariant to maintain: No JS code that may touch the array should | |||
// run whilst we're writing to it | |||
let dest = unsafe { array.as_mut_slice() }; | |||
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 | |||
fn SetFftSize(&self, value: u32) -> Fallible<()> { | |||
if value > 32768 || value < 32 || | |||
(value & (value - 1) != 0) { | |||
return Err(Error::IndexSize) | |||
} | |||
self.engine.borrow_mut().set_fft_size(value as usize); | |||
Ok(()) | |||
} | |||
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/// https://webaudio.github.io/web-audio-api/#dom-analysernode-fftsize | |||
fn FftSize(&self) -> u32 { | |||
self.engine.borrow().get_fft_size() as u32 | |||
} | |||
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/// https://webaudio.github.io/web-audio-api/#dom-analysernode-frequencybincount | |||
fn FrequencyBinCount(&self) -> u32 { | |||
self.FftSize() / 2 | |||
} | |||
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/// https://webaudio.github.io/web-audio-api/#dom-analysernode-mindecibels | |||
fn MinDecibels(&self) -> Finite<f64> { | |||
Finite::wrap(self.engine.borrow().get_min_decibels()) | |||
} | |||
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/// https://webaudio.github.io/web-audio-api/#dom-analysernode-mindecibels | |||
fn SetMinDecibels(&self, value: Finite<f64>) -> Fallible<()> { | |||
if *value >= self.engine.borrow().get_max_decibels() { | |||
return Err(Error::IndexSize) | |||
} | |||
self.engine.borrow_mut().set_min_decibels(*value); | |||
Ok(()) | |||
} | |||
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/// https://webaudio.github.io/web-audio-api/#dom-analysernode-maxdecibels | |||
fn MaxDecibels(&self) -> Finite<f64> { | |||
Finite::wrap(self.engine.borrow().get_max_decibels()) | |||
} | |||
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/// https://webaudio.github.io/web-audio-api/#dom-analysernode-maxdecibels | |||
fn SetMaxDecibels(&self, value: Finite<f64>) -> Fallible<()> { | |||
if *value <= self.engine.borrow().get_min_decibels() { | |||
return Err(Error::IndexSize) | |||
} | |||
self.engine.borrow_mut().set_max_decibels(*value); | |||
Ok(()) | |||
} | |||
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/// https://webaudio.github.io/web-audio-api/#dom-analysernode-smoothingtimeconstant | |||
fn SmoothingTimeConstant(&self) -> Finite<f64> { | |||
Finite::wrap(self.engine.borrow().get_smoothing_constant()) | |||
} | |||
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/// https://webaudio.github.io/web-audio-api/#dom-analysernode-smoothingtimeconstant | |||
fn SetSmoothingTimeConstant(&self, value: Finite<f64>) -> Fallible<()> { | |||
if *value < 0. || *value > 1. { | |||
return Err(Error::IndexSize) | |||
} | |||
self.engine.borrow_mut().set_smoothing_constant(*value); | |||
Ok(()) | |||
} | |||
} | |||
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Original file line number | Original file line | Diff line number | Diff line change |
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@@ -0,0 +1,28 @@ | |||
/* 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/. */ | |||
/* | |||
* The origin of this IDL file is | |||
* https://webaudio.github.io/web-audio-api/#analysernode | |||
*/ | |||
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dictionary AnalyserOptions : AudioNodeOptions { | |||
unsigned long fftSize = 2048; | |||
double maxDecibels = -30; | |||
double minDecibels = -100; | |||
double smoothingTimeConstant = 0.8; | |||
}; | |||
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[Exposed=Window, | |||
Constructor (BaseAudioContext context, optional AnalyserOptions options)] | |||
interface AnalyserNode : AudioNode { | |||
void getFloatFrequencyData (Float32Array array); | |||
void getByteFrequencyData (Uint8Array array); | |||
void getFloatTimeDomainData (Float32Array array); | |||
void getByteTimeDomainData (Uint8Array array); | |||
[SetterThrows] attribute unsigned long fftSize; | |||
readonly attribute unsigned long frequencyBinCount; | |||
[SetterThrows] attribute double minDecibels; | |||
[SetterThrows] attribute double maxDecibels; | |||
[SetterThrows] attribute double smoothingTimeConstant; | |||
}; |