Struct lame::Lame

pub struct Lame { /* fields omitted */ }

Represents a Lame encoder context.

Methods

impl Lame

fn new() -> Option<Lame>

Creates a new Lame encoder context with default parameters.

Returns None if liblame could not allocate its internal structures.

fn sample_rate(&self) -> u32

Sample rate of input PCM data. Defaults to 44100 Hz.

fn set_sample_rate(&mut self, sample_rate: u32) -> Result<(), Error>

Sets sample rate of input PCM data.

fn channels(&self) -> u8

Number of channels in input stream. Defaults to 2.

fn set_channels(&mut self, channels: u8) -> Result<(), Error>

Sets number of channels in input stream.

fn quality(&self) -> u8

LAME quality parameter. See set_quality for more details.

fn set_quality(&mut self, quality: u8) -> Result<(), Error>

Sets LAME's quality parameter. True quality is determined by the bitrate but this parameter affects quality by influencing whether LAME selects expensive or cheap algorithms.

This is a number from 0 to 9 (inclusive), where 0 is the best and slowest and 9 is the worst and fastest.

fn kilobitrate(&self) -> i32

Returns the output bitrate in kilobits per second.

fn set_kilobitrate(&mut self, quality: i32) -> Result<(), Error>

Sets the target output bitrate. This value is in kilobits per second, so passing 320 would select an output bitrate of 320kbps.

fn init_params(&mut self) -> Result<(), Error>

Sets more internal parameters according to the other basic parameter settings.

fn encode(
    &mut self,
    pcm_left: &[i16],
    pcm_right: &[i16],
    mp3_buffer: &mut [u8]
) -> Result<usize, EncodeError>

Encodes PCM data into MP3 frames. The pcm_left and pcm_right buffers must be of the same length, or this function will panic.

Trait Implementations

impl Drop for Lame

fn drop(&mut self)

Executes the destructor for this type.