Enum Quality

pub enum Quality {
    Variable(u32),
    Bitrate(u32),
}

How hard the encoder should try, as the user asked for it.

Variants

Variable(u32)

A variable-quality setting, V0–V9 for MP3 or q0–q10 for Vorbis: lower is better for MP3, higher is better for Vorbis, which is the encoders’ own convention and not something to paper over.

Bitrate(u32)

A constant bitrate in kbps, written 192k.

Implementations

impl Quality

pub const FORMS: &'static str = "V0…V9 for MP3, q0…q10 for Vorbis, or a bitrate like 192k"

How the setting is written, for a message that repeats what was typed.

pub fn parse(word: &str) -> Option<Quality>

Reads V0, q6 or 192k, and nothing else.

A value that parses as none of the three is refused rather than quietly replaced by the default: an encoder silently running at the wrong setting produces files that are wrong in a way nobody notices until the card is full.

pub fn parse_for(target: Target, word: &str) -> Option<Quality>

Reads and validates a quality setting for one encoder.

MP3 accepts only its V scale and supported constant bitrates; Vorbis accepts its q scale or a bitrate. Opus and AAC have bitrate settings.

Trait Implementations

impl Clone for Quality

fn clone(&self) -> Quality

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Quality

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl PartialEq for Quality

fn eq(&self, other: &Quality) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for Quality

impl Eq for Quality

impl StructuralPartialEq for Quality