Struct FpsConfig 

pub struct FpsConfig {
    pub multiplier: u32,
    pub mode: VideoExportMode,
}

Parsed FPS configuration.

This struct handles parsing of FPS strings (like “1x”, “2x”, “120”) and calculates the appropriate capture rate and output framerate based on the video export mode.

Fields

multiplier: u32

Multiplier for frame capture (1 = normal, 2 = capture twice per frame, etc.)

mode: VideoExportMode

The export mode (accurate or smooth)

Implementations

impl FpsConfig

pub fn parse(s: &str, mode: VideoExportMode) -> Result<Self, String>

Parse an FPS string (e.g., “1x”, “2x”, “60”, “120.0”).

• Multipliers like “1x”, “2x”, “3x” specify how often to sample the framebuffer
• Fixed values like “60” or “120.0” are converted to the nearest multiplier

pub fn output_fps(&self) -> f64

Get the output framerate as a floating-point value.

pub fn output_fps_rational(&self) -> String

Get the output framerate as a rational string for FFmpeg.

For accurate mode, this returns the exact NES framerate fraction multiplied. For smooth mode, this returns clean integer multiples of 60.

pub fn captures_per_frame(&self) -> u32

Get the number of frames to capture per PPU frame.

For 1x, this is 1 (capture once per complete frame). For 2x, this is 2 (capture at mid-frame and end of frame). For 3x, this is 3 (capture at 1/3, 2/3, and end of frame).

pub fn needs_mid_frame_capture(&self) -> bool

Check if this configuration requires mid-frame captures.

Trait Implementations

impl Clone for FpsConfig

fn clone(&self) -> FpsConfig

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for FpsConfig

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

Formats the value using the given formatter.

impl Default for FpsConfig

fn default() -> Self

Returns the “default value” for a type.