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AudioBuffer stub
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4 changed files with 113 additions and 1 deletions
82
components/script/dom/audiobuffer.rs
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82
components/script/dom/audiobuffer.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::MAX_CHANNEL_COUNT;
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use dom::bindings::codegen::Bindings::AudioBufferBinding::{self, AudioBufferMethods, AudioBufferOptions};
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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::reflector::{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 smallvec::SmallVec;
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#[derive(JSTraceable, MallocSizeOf)]
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struct AudioChannel(pub Vec<f32>);
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impl AudioChannel {
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pub fn new(capacity: usize) -> AudioChannel {
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AudioChannel(Vec::with_capacity(capacity))
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}
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}
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#[dom_struct]
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pub struct AudioBuffer {
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reflector_: Reflector,
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internal_data: SmallVec<[AudioChannel; MAX_CHANNEL_COUNT as usize]>,
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sample_rate: f32,
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length: u32,
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duration: f64,
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number_of_channels: u32,
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}
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impl AudioBuffer {
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#[allow(unrooted_must_root)]
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#[allow(unsafe_code)]
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pub fn new_inherited(options: &AudioBufferOptions) -> AudioBuffer {
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let mut internal_data = SmallVec::new();
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unsafe { internal_data.set_len(options.numberOfChannels as usize); }
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AudioBuffer {
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reflector_: Reflector::new(),
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internal_data,
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sample_rate: *options.sampleRate,
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length: options.length,
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duration: options.length as f64 / *options.sampleRate as f64,
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number_of_channels: options.numberOfChannels,
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}
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}
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#[allow(unrooted_must_root)]
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pub fn new(global: &Window,
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options: &AudioBufferOptions) -> DomRoot<AudioBuffer> {
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let buffer = AudioBuffer::new_inherited(options);
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reflect_dom_object(Box::new(buffer), global, AudioBufferBinding::Wrap)
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}
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pub fn Constructor(window: &Window,
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options: &AudioBufferOptions) -> Fallible<DomRoot<AudioBuffer>> {
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if options.numberOfChannels > MAX_CHANNEL_COUNT {
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return Err(Error::NotSupported);
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}
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Ok(AudioBuffer::new(window, options))
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}
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}
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impl AudioBufferMethods for AudioBuffer {
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fn SampleRate(&self) -> Finite<f32> {
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Finite::wrap(self.sample_rate)
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}
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fn Length(&self) -> u32 {
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self.length
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}
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fn Duration(&self) -> Finite<f64> {
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Finite::wrap(self.duration)
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}
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fn NumberOfChannels(&self) -> u32 {
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self.number_of_channels
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}
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}
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