Struct WasmStreamingEncoder 

pub struct WasmStreamingEncoder { /* private fields */ }

Encodes samples frame-by-frame as they arrive, returning encoded frames ready for transmission. Use this for low-latency streaming encoding where you push samples and pull frames.

Implementations

impl WasmStreamingEncoder

pub fn new(sample_rate: u32, channels: u8, bit_depth: u8) -> Self

Create a new streaming encoder

Arguments

• sample_rate - Sample rate in Hz (e.g., 44100)
• channels - Number of channels (1 or 2)
• bit_depth - Bits per sample (16, 24, or 32)

Returns

New encoder instance

pub fn with_compression(self, level: u8) -> Self

Set compression level (0-9)

Arguments

• level - Compression level (0=fast/large, 9=slow/small)

Returns

Self for method chaining

pub fn push_samples(&mut self, samples: &[f32]) -> Result<(), JsValue>

Push audio samples to the encoder

Samples should be interleaved if multi-channel (e.g., [L0, R0, L1, R1, …] for stereo). Frames are encoded automatically when enough samples accumulate.

Arguments

• samples - Interleaved f32 audio samples (-1.0 to 1.0)

Returns

Error if encoding fails

pub fn next_frame(&mut self) -> JsValue

Get the next encoded frame if available

Returns an object with: index, timestamp_ms, data (Uint8Array), samples Returns null if no frames are ready yet.

Returns

Encoded frame object or null

pub fn pending_samples(&self) -> usize

Get number of samples currently buffered

Returns

Number of sample frames in buffer

pub fn pending_frames(&self) -> usize

Get number of encoded frames ready for transmission

Returns

Number of ready frames

pub fn flush(&mut self) -> Result<(), JsValue>

Flush remaining samples and finalize encoding

Call this when done pushing samples. Encodes any remaining partial frame. After this, call finalize() to get the complete flo file.

Returns

Error if encoding fails

pub fn finalize( &mut self, metadata: Option<Vec<u8>>, ) -> Result<Vec<u8>, JsValue>

Build a complete flo file from all accumulated frames

Call flush() first, then this method to generate the complete file. The file will contain all encoded frames with proper table-of-contents.

Arguments

• metadata - Optional metadata bytes (MessagePack encoded, use create_metadata())

Returns

Complete flo file as byte array

Trait Implementations

impl Default for WasmStreamingEncoder

Available on crate feature wasm only.

fn default() -> Self

Returns the “default value” for a type.

impl From<WasmStreamingEncoder> for JsValue

fn from(value: WasmStreamingEncoder) -> Self

Converts to this type from the input type.

impl FromWasmAbi for WasmStreamingEncoder

type Abi = WasmPtr<WasmRefCell<WasmStreamingEncoder>>

The Wasm ABI type that this converts from when coming back out from the ABI boundary.

unsafe fn from_abi(js: Self::Abi) -> Self

Recover a Self from Self::Abi.

impl IntoWasmAbi for WasmStreamingEncoder

type Abi = WasmPtr<WasmRefCell<WasmStreamingEncoder>>

The Wasm ABI type that this converts into when crossing the ABI boundary.

fn into_abi(self) -> Self::Abi

Convert self into Self::Abi so that it can be sent across the wasm ABI boundary.

impl LongRefFromWasmAbi for WasmStreamingEncoder

type Abi = WasmPtr<WasmRefCell<WasmStreamingEncoder>>

Same as RefFromWasmAbi::Abi

type Anchor = RcRef<WasmStreamingEncoder>

Same as RefFromWasmAbi::Anchor

unsafe fn long_ref_from_abi(js: Self::Abi) -> Self::Anchor

Same as RefFromWasmAbi::ref_from_abi

impl OptionFromWasmAbi for WasmStreamingEncoder

fn is_none(abi: &Self::Abi) -> bool

Tests whether the argument is a “none” instance. If so it will be deserialized as None, and otherwise it will be passed to FromWasmAbi.

impl OptionIntoWasmAbi for WasmStreamingEncoder

fn none() -> Self::Abi

Returns an ABI instance indicating “none”, which JS will interpret as the None branch of this option.

impl RefFromWasmAbi for WasmStreamingEncoder

type Abi = WasmPtr<WasmRefCell<WasmStreamingEncoder>>

The Wasm ABI type references to Self are recovered from.

type Anchor = RcRef<WasmStreamingEncoder>

The type that holds the reference to Self for the duration of the invocation of the function that has an &Self parameter. This is required to ensure that the lifetimes don’t persist beyond one function call, and so that they remain anonymous.

unsafe fn ref_from_abi(js: Self::Abi) -> Self::Anchor

Recover a Self::Anchor from Self::Abi.

impl RefMutFromWasmAbi for WasmStreamingEncoder

type Abi = WasmPtr<WasmRefCell<WasmStreamingEncoder>>

Same as RefFromWasmAbi::Abi

type Anchor = RcRefMut<WasmStreamingEncoder>

Same as RefFromWasmAbi::Anchor

unsafe fn ref_mut_from_abi(js: Self::Abi) -> Self::Anchor

Same as RefFromWasmAbi::ref_from_abi

impl SupportsConstructor for WasmStreamingEncoder

impl SupportsInstanceProperty for WasmStreamingEncoder

impl SupportsStaticProperty for WasmStreamingEncoder

impl TryFromJsValue for WasmStreamingEncoder

fn try_from_js_value(value: JsValue) -> Result<Self, JsValue>

Performs the conversion.

fn try_from_js_value_ref(value: &JsValue) -> Option<Self>

Performs the conversion.

impl VectorFromWasmAbi for WasmStreamingEncoder

type Abi = <Box<[JsValue]> as FromWasmAbi>::Abi

unsafe fn vector_from_abi(js: Self::Abi) -> Box<[WasmStreamingEncoder]>

impl VectorIntoWasmAbi for WasmStreamingEncoder

type Abi = <Box<[JsValue]> as IntoWasmAbi>::Abi

fn vector_into_abi(vector: Box<[WasmStreamingEncoder]>) -> Self::Abi

impl WasmDescribe for WasmStreamingEncoder

fn describe()

impl WasmDescribeVector for WasmStreamingEncoder

fn describe_vector()