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video: Add bindings for calculate_display_ratio()

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This commit is contained in:
Sebastian Dröge 2020-05-20 09:14:58 +03:00
parent 1b7e99938f
commit 8029d85232
1 changed files with 35 additions and 1 deletions
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36
gstreamer-video/src/functions.rs
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@ -11,9 +11,10 @@ use gst_sys;
use gst_video_sys; use gst_video_sys;
use glib; use glib;
use glib::translate::{from_glib_full, ToGlib, ToGlibPtr}; use glib::translate::{from_glib, from_glib_full, ToGlib, ToGlibPtr};
use gst; use gst;
use std::mem;
use std::ptr; use std::ptr;
pub fn convert_sample( pub fn convert_sample(
@ -140,6 +141,39 @@ pub fn convert_sample_future(
Box::pin(future) Box::pin(future)
} }
pub fn calculate_display_ratio(
video_width: u32,
video_height: u32,
video_par: gst::Fraction,
display_par: gst::Fraction,
) -> Option<gst::Fraction> {
skip_assert_initialized!();
unsafe {
let mut dar_n = mem::MaybeUninit::uninit();
let mut dar_d = mem::MaybeUninit::uninit();
let res: bool = from_glib(gst_video_sys::gst_video_calculate_display_ratio(
dar_n.as_mut_ptr(),
dar_d.as_mut_ptr(),
video_width,
video_height,
*video_par.numer() as u32,
*video_par.denom() as u32,
*display_par.numer() as u32,
*display_par.denom() as u32,
));
if res {
Some(gst::Fraction::new(
dar_n.assume_init() as i32,
dar_d.assume_init() as i32,
))
} else {
None
}
}
}
#[cfg(test)] #[cfg(test)]
mod tests { mod tests {
use super::*; use super::*;