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video_meta: Add a safe wrapper for the VIDEO_TRANSFORM of metas

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With a test

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer-rs/-/merge_requests/1388>
This commit is contained in:
Olivier Crête 2024-02-08 18:29:53 -05:00
parent 28931e2f09
commit b47aba1837
1 changed files with 60 additions and 1 deletions
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61
gstreamer-video/src/video_meta.rs
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@ -1168,6 +1168,38 @@ pub mod tags {
gst::impl_meta_tag!(Colorspace, GST_META_TAG_VIDEO_COLORSPACE_STR);
}
#[derive(Debug, Clone, PartialEq, Eq)]
pub struct VideoMetaTransform<'a> {
in_info: &'a crate::VideoInfo,
out_info: &'a crate::VideoInfo,
}
impl<'a> VideoMetaTransform<'a> {
pub fn new(in_info: &'a crate::VideoInfo, out_info: &'a crate::VideoInfo) -> Self {
skip_assert_initialized!();
VideoMetaTransform { in_info, out_info }
}
}
unsafe impl<'a> gst::meta::MetaTransform<'a> for VideoMetaTransform<'a> {
type GLibType = ffi::GstVideoMetaTransform;
#[doc(alias = "gst_video_meta_transform_scale_get_quark")]
fn quark() -> glib::Quark {
unsafe { from_glib(ffi::gst_video_meta_transform_scale_get_quark()) }
}
fn to_raw<T: MetaAPI>(
&self,
_meta: &gst::MetaRef<T>,
) -> Result<ffi::GstVideoMetaTransform, glib::BoolError> {
Ok(ffi::GstVideoMetaTransform {
in_info: mut_override(self.in_info.to_glib_none().0),
out_info: mut_override(self.out_info.to_glib_none().0),
})
}
}
#[cfg(test)]
mod tests {
use super::*;
@ -1254,7 +1286,7 @@ mod tests {
#[test]
#[cfg(feature = "v1_18")]
fn test_vide_meta_alignment() {
fn test_video_meta_alignment() {
gst::init().unwrap();
let mut buffer = gst::Buffer::with_size(115200).unwrap();
@ -1365,4 +1397,31 @@ mod tests {
assert_eq!(meta.data(), META_DATA);
assert_eq!(meta.data().len(), META_DATA.len());
}
#[test]
fn test_meta_video_transform() {
gst::init().unwrap();
let mut buffer = gst::Buffer::with_size(320 * 240 * 4).unwrap();
let meta = VideoCropMeta::add(buffer.get_mut().unwrap(), (10, 10, 20, 20));
let mut buffer2 = gst::Buffer::with_size(640 * 480 * 4).unwrap();
let in_video_info = crate::VideoInfo::builder(crate::VideoFormat::Rgba, 320, 240)
.build()
.unwrap();
let out_video_info = crate::VideoInfo::builder(crate::VideoFormat::Rgba, 640, 480)
.build()
.unwrap();
meta.transform(
buffer2.get_mut().unwrap(),
&VideoMetaTransform::new(&in_video_info, &out_video_info),
)
.unwrap();
let meta2 = buffer2.meta::<VideoCropMeta>().unwrap();
assert_eq!(meta2.rect(), (20, 20, 40, 40));
}
}