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video: add API to build raw video caps

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Guillaume Desmottes 2020-05-28 15:27:34 +02:00 committed by Sebastian Dröge
parent 1b0a20e52f
commit 9754147a30
1 changed files with 69 additions and 0 deletions
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69
gstreamer-video/src/functions.rs
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@ -12,8 +12,10 @@ use gst_video_sys;
use glib;
use glib::translate::{from_glib, from_glib_full, ToGlib, ToGlibPtr};
use glib::ToSendValue;
use gst;
use std::i32;
use std::mem;
use std::ptr;
@ -196,6 +198,28 @@ pub fn guess_framerate(duration: gst::ClockTime) -> Option<gst::Fraction> {
}
}
pub fn video_make_raw_caps(formats: &[::VideoFormat]) -> gst::caps::Builder<gst::caps::NoFeature> {
assert_initialized_main_thread!();
let formats: Vec<glib::SendValue> = formats
.iter()
.map(|f| match f {
::VideoFormat::Encoded => panic!("Invalid encoded format"),
::VideoFormat::Unknown => panic!("Invalid unknown format"),
_ => f.to_string().to_send_value(),
})
.collect();
gst::caps::Caps::builder("video/x-raw")
.field("format", &gst::List::from_owned(formats))
.field("width", &gst::IntRange::<i32>::new(1, i32::MAX))
.field("height", &gst::IntRange::<i32>::new(1, i32::MAX))
.field(
"framerate",
&gst::FractionRange::new(gst::Fraction::new(0, 1), gst::Fraction::new(i32::MAX, 1)),
)
}
#[cfg(test)]
mod tests {
use super::*;
@ -258,4 +282,49 @@ mod tests {
}
}
}
#[test]
fn video_caps() {
gst::init().unwrap();
let caps = video_make_raw_caps(&[::VideoFormat::Nv12, ::VideoFormat::Nv16]).build();
assert_eq!(caps.to_string(), "video/x-raw, format=(string){ NV12, NV16 }, width=(int)[ 1, 2147483647 ], height=(int)[ 1, 2147483647 ], framerate=(fraction)[ 0/1, 2147483647/1 ]");
#[cfg(feature = "v1_18")]
{
/* video_make_raw_caps() is a re-implementation so ensure it returns the same caps as the C API */
let c_caps = unsafe {
let formats: Vec<gst_video_sys::GstVideoFormat> =
[::VideoFormat::Nv12, ::VideoFormat::Nv16]
.iter()
.map(|f| f.to_glib())
.collect();
let caps =
gst_video_sys::gst_video_make_raw_caps(formats.as_ptr(), formats.len() as u32);
from_glib_full(caps)
};
assert_eq!(caps, c_caps);
}
let caps = video_make_raw_caps(&[::VideoFormat::Nv12, ::VideoFormat::Nv16])
.field("width", &800)
.field("height", &600)
.field("framerate", &gst::Fraction::new(30, 1))
.build();
assert_eq!(caps.to_string(), "video/x-raw, format=(string){ NV12, NV16 }, width=(int)800, height=(int)600, framerate=(fraction)30/1");
}
#[test]
#[should_panic(expected = "Invalid encoded format")]
fn video_caps_encoded() {
gst::init().unwrap();
video_make_raw_caps(&[::VideoFormat::Encoded]);
}
#[test]
#[should_panic(expected = "Invalid unknown format")]
fn video_caps_unknown() {
gst::init().unwrap();
video_make_raw_caps(&[::VideoFormat::Unknown]);
}
}