Struct Layout 

pub struct Layout {
    pub seq_len: usize,
    pub segments: Vec<Segment>,
    pub pos: Vec<[f64; 3]>,
    pub text_len: usize,
    pub audio_t: usize,
    pub latent_t: usize,
    pub lat_h: usize,
    pub lat_w: usize,
    pub frame_rows: usize,
    pub text_tags: Vec<u8>,
}

The static structure of one shape signature: where each stream sits in the sequence and what 3-D position every row carries.

Fields

seq_len: usize

segments: Vec<Segment>

pos: Vec<[f64; 3]>

[seq_len, 3] — (t, h, w), f64 because the axes are fractional.

text_len: usize

audio_t: usize

latent_t: usize

lat_h: usize

lat_w: usize

frame_rows: usize

Rows per latent frame after the 2×2 patch.

text_tags: Vec<u8>

Per-token modality tag for the text span. A vision block inside the prompt carries the VIDEO tag, not the text one.

Implementations

impl Layout

pub fn t2va( text_len: usize, latent_t: usize, lat_h: usize, lat_w: usize, audio_t: usize, ) -> Self

t2va: [text | audio | video], the target streams last and in that order. Keyframe and reference blocks would slot between the text and the audio; this port does text-to-video only.

pub fn fl2va( text_len: usize, latent_t: usize, lat_h: usize, lat_w: usize, audio_t: usize, frames: &[(usize, usize)], text_tags: &[u8], ) -> Self

fl2va: keyframe condition rows sit between the text and the audio, sharing the TARGET spatial grid, each pinned to the time coordinate of the frame it stands for — the first frame at the text’s end, the last one a whole clip further on, minus one span. They never advance the cursor, so audio and video still start where they would have.

frames gives each keyframe’s pixel index and the clip’s total, and text_tags the per-token modality of the prompt span.

pub fn ref2va( text_len: usize, latent_t: usize, lat_h: usize, lat_w: usize, audio_t: usize, refs: &[Ref], text_tags: &[u8], ) -> Self

ref2va: reference images, audio and clips ahead of the target streams. Unlike a keyframe, a reference ADVANCES the cursor — each block occupies its own stretch of the time axis, and the target audio and video begin after the last of them.

pub fn cond_rows(&self) -> usize

How many keyframe condition rows the layout carries.