Struct servo_media_audio::biquad_filter_node::BiquadFilterNode

pub(crate) struct BiquadFilterNode {
    channel_info: ChannelInfo,
    filter: FilterType,
    frequency: Param,
    detune: Param,
    q: Param,
    gain: Param,
    b0: f64,
    b1: f64,
    b2: f64,
    a1: f64,
    a2: f64,
    state: SmallVec<[BiquadState; 2]>,
}

https://webaudio.github.io/web-audio-api/#biquadfilternode

Fields

channel_info: ChannelInfo

filter: FilterType

frequency: Param

detune: Param

q: Param

gain: Param

b0: f64

The computed filter parameter b0 This is actually b0 / a0, we pre-divide for efficiency

b1: f64

The computed filter parameter b1 This is actually b1 / a0, we pre-divide for efficiency

b2: f64

The computed filter parameter b2 This is actually b2 / a0, we pre-divide for efficiency

a1: f64

The computed filter parameter a1 This is actually a1 / a0, we pre-divide for efficiency

a2: f64

The computed filter parameter a2 This is actually a2 / a0, we pre-divide for efficiency

state: SmallVec<[BiquadState; 2]>

Stored filter state, this contains the last two frames of input and output values for every channel

Implementations

impl BiquadFilterNode

pub fn new( options: BiquadFilterNodeOptions, channel_info: ChannelInfo, sample_rate: f32 ) -> Self

pub fn update_parameters(&mut self, info: &BlockInfo, tick: Tick) -> bool

fn constant_z_transform(&mut self, b0: f64)

Set to the constant z-transform y[n] = b0 * x[n]

fn update_coefficients(&mut self, fs: f32)

Update the coefficients a1, a2, b0, b1, b2, given the sample_rate

See https://webaudio.github.io/web-audio-api/#filters-characteristics

Trait Implementations

impl AudioNodeCommon for BiquadFilterNode

fn channel_info(&self) -> &ChannelInfo

fn channel_info_mut(&mut self) -> &mut ChannelInfo

impl AudioNodeEngine for BiquadFilterNode

fn node_type(&self) -> AudioNodeType

fn process(&mut self, inputs: Chunk, info: &BlockInfo) -> Chunk

fn get_param(&mut self, id: ParamType) -> &mut Param

fn message_specific(&mut self, message: AudioNodeMessage, sample_rate: f32)

Messages specific to this node

fn message(&mut self, msg: AudioNodeMessage, sample_rate: f32)

fn input_count(&self) -> u32

fn output_count(&self) -> u32

fn channel_count(&self) -> u8

Number of input channels for each input port

fn channel_count_mode(&self) -> ChannelCountMode

fn channel_interpretation(&self) -> ChannelInterpretation

fn set_channel_interpretation(&mut self, i: ChannelInterpretation)

fn set_channel_count(&mut self, c: u8)

fn set_channel_count_mode(&mut self, m: ChannelCountMode)

fn destination_data(&mut self) -> Option<Chunk>

If we’re the destination node, extract the contained data

fn set_listenerdata(&mut self, _: Block)