mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer-rs.git
synced 2025-04-25 18:14:21 +00:00
87 lines
2.5 KiB
Rust
87 lines
2.5 KiB
Rust
// Copyright (C) 2017 Sebastian Dröge <sebastian@centricular.com>
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
|
|
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
|
|
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
|
|
// option. This file may not be copied, modified, or distributed
|
|
// except according to those terms.
|
|
|
|
use ffi;
|
|
use gst_ffi;
|
|
use glib_ffi;
|
|
|
|
use gst;
|
|
use glib;
|
|
use glib::translate::{from_glib_full, ToGlib, ToGlibPtr};
|
|
|
|
use std::ptr;
|
|
use std::mem;
|
|
|
|
pub fn convert_sample(
|
|
sample: &gst::Sample,
|
|
caps: &gst::Caps,
|
|
timeout: gst::ClockTime,
|
|
) -> Result<gst::Sample, glib::Error> {
|
|
unsafe {
|
|
let mut error = ptr::null_mut();
|
|
let ret = ffi::gst_video_convert_sample(
|
|
sample.to_glib_none().0,
|
|
caps.to_glib_none().0,
|
|
timeout.to_glib(),
|
|
&mut error,
|
|
);
|
|
|
|
if error.is_null() {
|
|
Ok(from_glib_full(ret))
|
|
} else {
|
|
Err(from_glib_full(error))
|
|
}
|
|
}
|
|
}
|
|
|
|
pub fn convert_sample_async<F>(
|
|
sample: &gst::Sample,
|
|
caps: &gst::Caps,
|
|
timeout: gst::ClockTime,
|
|
func: F,
|
|
) where
|
|
F: FnOnce(Result<gst::Sample, glib::Error>) + Send + 'static,
|
|
{
|
|
unsafe extern "C" fn convert_sample_async_trampoline<F>(
|
|
sample: *mut gst_ffi::GstSample,
|
|
error: *mut glib_ffi::GError,
|
|
user_data: glib_ffi::gpointer,
|
|
) where
|
|
F: FnOnce(Result<gst::Sample, glib::Error>) + Send + 'static,
|
|
{
|
|
callback_guard!();
|
|
let callback: &mut Option<Box<F>> = mem::transmute(user_data);
|
|
let callback = callback.take().unwrap();
|
|
|
|
if error.is_null() {
|
|
callback(Ok(from_glib_full(sample)))
|
|
} else {
|
|
callback(Err(from_glib_full(error)))
|
|
}
|
|
}
|
|
unsafe extern "C" fn convert_sample_async_free<F>(user_data: glib_ffi::gpointer)
|
|
where
|
|
F: FnOnce(Result<gst::Sample, glib::Error>) + Send + 'static,
|
|
{
|
|
callback_guard!();
|
|
let _: Box<Option<Box<F>>> = Box::from_raw(user_data as *mut _);
|
|
}
|
|
|
|
unsafe {
|
|
let user_data: Box<Option<Box<F>>> = Box::new(Some(Box::new(func)));
|
|
|
|
ffi::gst_video_convert_sample_async(
|
|
sample.to_glib_none().0,
|
|
caps.to_glib_none().0,
|
|
timeout.to_glib(),
|
|
Some(convert_sample_async_trampoline::<F>),
|
|
Box::into_raw(user_data) as glib_ffi::gpointer,
|
|
Some(convert_sample_async_free::<F>),
|
|
);
|
|
}
|
|
}
|