gstreamer-rs/gstreamer-video/src/video_vbi.rs

35 lines
1.2 KiB
Rust

use crate::VideoFormat;
pub(super) const VBI_HD_MIN_PIXEL_WIDTH: u32 = 1280;
// rustdoc-stripper-ignore-next
/// Video Vertical Blanking Interval related Errors.
#[derive(thiserror::Error, Clone, Copy, Debug, Eq, PartialEq)]
pub enum VideoVBIError {
#[error("Format and/or pixel_width is not supported")]
Unsupported,
#[error("Not enough space left in the current line")]
NotEnoughSpace,
#[error("Not enough data left in the current line")]
NotEnoughData,
#[error("Insufficient line buffer length {found}. Expected: {expected}")]
InsufficientLineBufLen { found: usize, expected: usize },
}
// rustdoc-stripper-ignore-next
/// Returns the buffer length needed to store the line.
pub(super) fn line_buffer_len(format: VideoFormat, width: u32) -> usize {
skip_assert_initialized!();
// Taken from gst-plugins-base/gst-libs/gst/video/video-info.c:fill_planes
match format {
VideoFormat::V210 => ((width as usize + 47) / 48) * 128,
VideoFormat::Uyvy => {
// round up width to the next multiple of 4
// FIXME: {integer}::next_multiple_of was stabilised in rustc 1.73.0
((width as usize * 2) + 3) & !3
}
_ => unreachable!(),
}
}