Enum SmfDivision 

pub enum SmfDivision {
    Metrical {
        ticks_per_quarter: NonZeroU16,
    },
    Smpte {
        frames_per_second: SmpteRate,
        ticks_per_frame: NonZeroU8,
    },
}

The lossless time-division field from an SMF header.

Variants

Metrical

Metrical timing in ticks per quarter note.

Fields

ticks_per_quarter: NonZeroU16

Non-zero ticks per quarter note.

Smpte

Timecode timing in subdivisions of an SMPTE frame.

Fields

frames_per_second: SmpteRate

One of the four frame rates permitted by SMF.

ticks_per_frame: NonZeroU8

Non-zero subdivisions per frame.

Implementations

impl SmfDivision

pub const fn metrical(ticks_per_quarter: u16) -> Option<Self>

Constructs a metrical division, returning None for zero or a value with the SMPTE high bit set.

pub const fn smpte( frames_per_second: SmpteRate, ticks_per_frame: u8, ) -> Option<Self>

Constructs an SMPTE division, returning None for zero ticks per frame.

pub const fn ticks_per_quarter(self) -> Option<NonZeroU16>

Returns metrical ticks per quarter note, or None for SMPTE timing.

pub const fn ticks_per_second_ratio(self) -> Option<(u32, u32)>

Returns the exact number of SMF ticks per second as a ratio, or None for metrical timing whose tempo is carried by events.

pub const fn event_time_base(self) -> u32

Returns the resolution used in each event’s TickTime.

For metrical files this is ticks per quarter note. For SMPTE files it is nominal ticks per second (30 fps for the -29 drop-frame code); ticks_per_second_ratio retains the exact 30_000 / 1_001 rate for duration calculations.

Trait Implementations

impl Clone for SmfDivision

fn clone(&self) -> SmfDivision

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for SmfDivision

impl Debug for SmfDivision

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

Formats the value using the given formatter.

impl Eq for SmfDivision

impl Hash for SmfDivision

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for SmfDivision

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for SmfDivision