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audio: add support for web audio API
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require 'browser/audio/node' | ||
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module Browser; module Audio | ||
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class Context | ||
include Native | ||
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alias_native :destination | ||
alias_native :listener | ||
alias_native :state | ||
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alias_native :sample_rate, :sampleRate | ||
alias_native :current_time, :currentTime | ||
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def initialize | ||
super `new AudioContext()` | ||
end | ||
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def gain | ||
Node::Gain.new(self) | ||
end | ||
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def oscillator | ||
Node::Oscillator.new(self) | ||
end | ||
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def delay | ||
Node::Delay.new(self) | ||
end | ||
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def dynamics_compressor | ||
Node::DynamicsCompressor.new(self) | ||
end | ||
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def biquad_filter | ||
Node::BiquadFilter.new(self) | ||
end | ||
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def stereo_panner | ||
Node::StereoPanner.new(self) | ||
end | ||
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alias_native :suspend | ||
alias_native :resume | ||
alias_native :close | ||
end | ||
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end; end |
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module Browser; module Audio; module Node; | ||
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module Pluggable | ||
def connect(other_node) | ||
`#@native.connect(#{Native.convert(other_node)})` | ||
end | ||
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def disconnect(other_node, options = {}) | ||
other_node = Native.try_convert(other_node) | ||
output = options[:output] || 0 | ||
input = options[:input] || 0 | ||
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if options | ||
`#@native.disconnect(#{other_node}, #{output}, #{input}) || nil` | ||
elsif other_node | ||
`#@native.disconnect(#{other_node})` | ||
else | ||
`#@native.disconnect()` | ||
end | ||
end | ||
end | ||
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class Gain | ||
include Native | ||
include Pluggable | ||
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alias_native :value, :gain | ||
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def initialize(audio_context) | ||
super `#{audio_context.to_n}.createGain()` | ||
end | ||
end | ||
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class Oscillator | ||
TYPES = %i(sine square sawtooth triangle custom) | ||
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include Native | ||
include Pluggable | ||
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alias_native :start | ||
alias_native :stop | ||
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def initialize(audio_context) | ||
super `#{audio_context.to_n}.createOscillator()` | ||
end | ||
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def type=(type) | ||
unless TYPES.include?(type) | ||
raise ArgumentError, "type #{type} doesn't exists" | ||
end | ||
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`#@native.type = type` | ||
end | ||
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def type | ||
`#@native.type` | ||
end | ||
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def frequency=(frequency) | ||
`#@native.frequency.value = frequency` | ||
end | ||
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def frequency | ||
`#@native.frequency.value` | ||
end | ||
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def detune=(detune) | ||
`#@native.detune.value = detune` | ||
end | ||
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def detune | ||
`#@native.detune.value` | ||
end | ||
end | ||
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class Delay | ||
include Native | ||
include Pluggable | ||
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def initialize(audio_context, max_time) | ||
super `#{audio_context.to_n}.createDelay(max_time || 1)` | ||
end | ||
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def time=(time) | ||
`#@native.time.value = time` | ||
end | ||
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def time | ||
`#@native.time.value` | ||
end | ||
end | ||
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class DynamicsCompressor | ||
include Native | ||
include Pluggable | ||
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alias_native :reduction | ||
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def treshold=(treshold) | ||
`#@native.treshold.value = treshold` | ||
end | ||
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def treshold | ||
`#@native.treshold.value` | ||
end | ||
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def knee=(knee) | ||
`#@native.knee.value = knee` | ||
end | ||
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def knee | ||
`#@native.knee.value` | ||
end | ||
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def ratio=(ratio) | ||
`#@native.ratio.value = ratio` | ||
end | ||
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def ratio | ||
`#@native.ratio.value` | ||
end | ||
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def attack=(attack) | ||
`#@native.attack.value = attack` | ||
end | ||
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def attack | ||
`#@native.attack.value` | ||
end | ||
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def release=(release) | ||
`#@native.release.value = release` | ||
end | ||
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def release | ||
`#@native.release.value` | ||
end | ||
end | ||
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class BiquadFilter | ||
include Native | ||
include Pluggable | ||
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def initialize(audio_context) | ||
super `#{audio_context.to_n}.createBiquadFilter()` | ||
end | ||
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def detune=(detune) | ||
`#@native.detune.value = #{@detune = detune}` | ||
end | ||
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def q=(q) | ||
`#@native.q.value = q` | ||
end | ||
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def q | ||
`#@native.q.value` | ||
end | ||
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def gain=(gain) | ||
`#@native.gain.value = gain` | ||
end | ||
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def gain | ||
`#@native.gain.value` | ||
end | ||
end | ||
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class StereoPanner | ||
include Native | ||
include Pluggable | ||
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def initialize(audio_context) | ||
super `#{audio_context.to_n}.createStereoPanner()` | ||
end | ||
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def pan=(pan) | ||
`#@native.pan.value = pan` | ||
end | ||
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def pan | ||
`#@native.pan.value` | ||
end | ||
end | ||
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end; end; end |