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examples/glupload: Update glutin to 0.26 with winit 0.24

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Winit 0.19 uses uninitialized variables which is invalid since Rust
1.48, leading to a runtime panic [1].  Updating to the latest version
resolves these issues but requires significant refactoring since the
event loop now runs entirely within a closure.

[1]: https://github.com/rust-windowing/winit/issues/1811
This commit is contained in:
Marijn Suijten 2021-04-10 16:24:12 +02:00
parent 8ab8f00005
commit 5e8634e9eb
3 changed files with 74 additions and 71 deletions
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5
deny.toml
View file

@ -30,6 +30,11 @@ name = "gstreamer-rs-lgpl-docs"
multiple-versions = "deny" multiple-versions = "deny"
wildcards = "allow" wildcards = "allow"
highlight = "all" highlight = "all"
skip-tree = [
# Winit introduces quite a few duplicate (outdated!) dependencies together
# with its direct dependant glutin.
{ name = "winit", version = "0.24" }
]
[sources] [sources]
unknown-registry = "deny" unknown-registry = "deny"

3
examples/Cargo.toml
View file

@ -32,8 +32,7 @@ byte-slice-cast = "1"
cairo-rs = { git = "https://github.com/gtk-rs/gtk-rs", features=["use_glib"], optional = true } cairo-rs = { git = "https://github.com/gtk-rs/gtk-rs", features=["use_glib"], optional = true }
pango = { git = "https://github.com/gtk-rs/gtk-rs", optional = true } pango = { git = "https://github.com/gtk-rs/gtk-rs", optional = true }
pangocairo = { git = "https://github.com/gtk-rs/gtk-rs", optional = true } pangocairo = { git = "https://github.com/gtk-rs/gtk-rs", optional = true }
glutin = { version = "0.21", optional = true } glutin = { version = "0.26", optional = true }
winit = { version = "0.19", optional = true }
once_cell = "1.0" once_cell = "1.0"
image = { version="0.23", optional = true } image = { version="0.23", optional = true }

137
examples/src/bin/glupload.rs
View file

@ -12,6 +12,7 @@ use gst_gl::prelude::*;
use std::ffi::CStr; use std::ffi::CStr;
use std::mem; use std::mem;
use std::ptr; use std::ptr;
use std::sync;
use std::sync::mpsc; use std::sync::mpsc;
use anyhow::Error; use anyhow::Error;
@ -184,7 +185,7 @@ impl Gl {
} }
} }
fn resize(&self, size: glutin::dpi::PhysicalSize) { fn resize(&self, size: glutin::dpi::PhysicalSize<u32>) {
unsafe { unsafe {
self.gl self.gl
.Viewport(0, 0, size.width as i32, size.height as i32); .Viewport(0, 0, size.width as i32, size.height as i32);
@ -318,7 +319,7 @@ struct App {
appsink: gst_app::AppSink, appsink: gst_app::AppSink,
glupload: gst::Element, glupload: gst::Element,
bus: gst::Bus, bus: gst::Bus,
events_loop: glutin::EventsLoop, event_loop: glutin::event_loop::EventLoop<()>,
windowed_context: glutin::WindowedContext<glutin::PossiblyCurrent>, windowed_context: glutin::WindowedContext<glutin::PossiblyCurrent>,
shared_context: gst_gl::GLContext, shared_context: gst_gl::GLContext,
} }
@ -332,11 +333,11 @@ impl App {
.get_bus() .get_bus()
.expect("Pipeline without bus. Shouldn't happen!"); .expect("Pipeline without bus. Shouldn't happen!");
let events_loop = glutin::EventsLoop::new(); let event_loop = glutin::event_loop::EventLoop::new();
let window = glutin::WindowBuilder::new().with_title("GL rendering"); let window = glutin::window::WindowBuilder::new().with_title("GL rendering");
let windowed_context = glutin::ContextBuilder::new() let windowed_context = glutin::ContextBuilder::new()
.with_vsync(true) .with_vsync(true)
.build_windowed(window, &events_loop)?; .build_windowed(window, &event_loop)?;
let windowed_context = unsafe { windowed_context.make_current().map_err(|(_, err)| err)? }; let windowed_context = unsafe { windowed_context.make_current().map_err(|(_, err)| err)? };
@ -345,10 +346,10 @@ impl App {
let shared_context: gst_gl::GLContext; let shared_context: gst_gl::GLContext;
if cfg!(target_os = "linux") { if cfg!(target_os = "linux") {
use glutin::os::unix::RawHandle; use glutin::platform::unix::RawHandle;
#[cfg(any(feature = "gst-gl-x11", feature = "gst-gl-wayland"))] #[cfg(any(feature = "gst-gl-x11", feature = "gst-gl-wayland"))]
use glutin::os::unix::WindowExt; use glutin::platform::unix::WindowExtUnix;
use glutin::os::ContextTraitExt; use glutin::platform::ContextTraitExt;
let api = App::map_gl_api(windowed_context.get_api()); let api = App::map_gl_api(windowed_context.get_api());
@ -368,7 +369,7 @@ impl App {
}; };
#[cfg(feature = "gst-gl-wayland")] #[cfg(feature = "gst-gl-wayland")]
if let Some(display) = inner_window.get_wayland_display() { if let Some(display) = inner_window.wayland_display() {
gl_display = Some( gl_display = Some(
unsafe { unsafe {
gst_gl_wayland::GLDisplayWayland::with_display(display as usize) gst_gl_wayland::GLDisplayWayland::with_display(display as usize)
@ -386,7 +387,7 @@ impl App {
} }
#[cfg(feature = "gst-gl-x11")] #[cfg(feature = "gst-gl-x11")]
RawHandle::Glx(glx_context) => { RawHandle::Glx(glx_context) => {
let gl_display = if let Some(display) = inner_window.get_xlib_display() { let gl_display = if let Some(display) = inner_window.xlib_display() {
unsafe { gst_gl_x11::GLDisplayX11::with_display(display as usize) }.unwrap() unsafe { gst_gl_x11::GLDisplayX11::with_display(display as usize) }.unwrap()
} else { } else {
panic!("X11 window without X Display"); panic!("X11 window without X Display");
@ -413,7 +414,7 @@ impl App {
shared_context.fill_info()?; shared_context.fill_info()?;
let gl_context = shared_context.clone(); let gl_context = shared_context.clone();
let events_proxy = events_loop.create_proxy(); let event_proxy = sync::Mutex::new(event_loop.create_proxy());
#[allow(clippy::single_match)] #[allow(clippy::single_match)]
bus.set_sync_handler(move |_, msg| { bus.set_sync_handler(move |_, msg| {
@ -446,7 +447,9 @@ impl App {
_ => (), _ => (),
} }
let _ = events_proxy.wakeup(); if let Err(e) = event_proxy.lock().unwrap().send_event(()) {
eprintln!("Failed to send BusEvent to event proxy: {}", e)
}
gst::BusSyncReply::Pass gst::BusSyncReply::Pass
}); });
@ -459,7 +462,7 @@ impl App {
appsink, appsink,
glupload, glupload,
bus, bus,
events_loop, event_loop,
windowed_context, windowed_context,
shared_context, shared_context,
}) })
@ -467,9 +470,9 @@ impl App {
fn setup( fn setup(
&self, &self,
events_loop: &glutin::EventsLoop, event_loop: &glutin::event_loop::EventLoop<()>,
) -> Result<mpsc::Receiver<gst::Sample>, Error> { ) -> Result<mpsc::Receiver<gst::Sample>, Error> {
let events_proxy = events_loop.create_proxy(); let events_proxy = event_loop.create_proxy();
let (sender, receiver) = mpsc::channel(); let (sender, receiver) = mpsc::channel();
self.appsink.set_callbacks( self.appsink.set_callbacks(
gst_app::AppSinkCallbacks::builder() gst_app::AppSinkCallbacks::builder()
@ -506,7 +509,7 @@ impl App {
.map(|_| gst::FlowSuccess::Ok) .map(|_| gst::FlowSuccess::Ok)
.map_err(|_| gst::FlowError::Error)?; .map_err(|_| gst::FlowError::Error)?;
let _ = events_proxy.wakeup(); let _ = events_proxy.send_event(());
Ok(gst::FlowSuccess::Ok) Ok(gst::FlowSuccess::Ok)
}) })
@ -595,13 +598,11 @@ impl App {
Ok(()) Ok(())
} }
fn into_context(self: App) -> glutin::WindowedContext<glutin::PossiblyCurrent> {
self.windowed_context
}
} }
fn main_loop(mut app: App) -> Result<glutin::WindowedContext<glutin::PossiblyCurrent>, Error> { fn main_loop(app: App) -> Result<(), Error> {
let receiver = app.setup(&app.event_loop)?;
println!( println!(
"Pixel format of the window's GL context {:?}", "Pixel format of the window's GL context {:?}",
app.windowed_context.get_pixel_format() app.windowed_context.get_pixel_format()
@ -609,42 +610,52 @@ fn main_loop(mut app: App) -> Result<glutin::WindowedContext<glutin::PossiblyCur
let gl = load(&app.windowed_context); let gl = load(&app.windowed_context);
let receiver = app.setup(&app.events_loop)?;
let mut curr_frame: Option<gst_video::VideoFrame<gst_video::video_frame::Readable>> = None; let mut curr_frame: Option<gst_video::VideoFrame<gst_video::video_frame::Readable>> = None;
let mut running = true;
let mut gst_gl_context: Option<gst_gl::GLContext> = None; let mut gst_gl_context: Option<gst_gl::GLContext> = None;
let events_loop = &mut app.events_loop;
let windowed_context = &mut app.windowed_context;
let bus = &app.bus;
while running { let App {
#[allow(clippy::single_match)] bus,
events_loop.poll_events(|event| match event { event_loop,
glutin::Event::WindowEvent { event, .. } => match event { glupload,
glutin::WindowEvent::CloseRequested pipeline,
| glutin::WindowEvent::KeyboardInput { shared_context,
windowed_context,
..
} = app;
event_loop.run(move |event, _, cf| {
*cf = glutin::event_loop::ControlFlow::Wait;
let mut needs_redraw = false;
match event {
glutin::event::Event::LoopDestroyed => {
pipeline.send_event(gst::event::Eos::new());
pipeline.set_state(gst::State::Null).unwrap();
}
glutin::event::Event::WindowEvent { event, .. } => match event {
glutin::event::WindowEvent::CloseRequested
| glutin::event::WindowEvent::KeyboardInput {
input: input:
glutin::KeyboardInput { glutin::event::KeyboardInput {
state: glutin::ElementState::Released, state: glutin::event::ElementState::Released,
virtual_keycode: Some(glutin::VirtualKeyCode::Escape), virtual_keycode: Some(glutin::event::VirtualKeyCode::Escape),
.. ..
}, },
.. ..
} => running = false, } => *cf = glutin::event_loop::ControlFlow::Exit,
glutin::WindowEvent::Resized(logical_size) => { glutin::event::WindowEvent::Resized(physical_size) => {
let dpi_factor = windowed_context.window().get_hidpi_factor(); windowed_context.resize(physical_size);
windowed_context.resize(logical_size.to_physical(dpi_factor)); gl.resize(physical_size);
gl.resize(logical_size.to_physical(dpi_factor));
} }
_ => (), _ => (),
}, },
glutin::event::Event::RedrawRequested(_) => needs_redraw = true,
_ => (), _ => (),
}); }
// Handle all pending messages. Whenever there is a message we will // Handle all pending messages. Whenever there is a message we will
// wake up the events loop above // wake up the events loop above
App::handle_messages(&bus)?; App::handle_messages(&bus).unwrap();
// get the last frame in channel // get the last frame in channel
if let Some(sample) = receiver.try_iter().last() { if let Some(sample) = receiver.try_iter().last() {
@ -656,8 +667,7 @@ fn main_loop(mut app: App) -> Result<glutin::WindowedContext<glutin::PossiblyCur
{ {
if gst_gl_context.is_none() { if gst_gl_context.is_none() {
gst_gl_context = app gst_gl_context = glupload
.glupload
.get_property("context") .get_property("context")
.unwrap() .unwrap()
.get::<gst_gl::GLContext>() .get::<gst_gl::GLContext>()
@ -670,38 +680,27 @@ fn main_loop(mut app: App) -> Result<glutin::WindowedContext<glutin::PossiblyCur
if let Ok(frame) = gst_video::VideoFrame::from_buffer_readable_gl(buffer, &info) { if let Ok(frame) = gst_video::VideoFrame::from_buffer_readable_gl(buffer, &info) {
curr_frame = Some(frame); curr_frame = Some(frame);
needs_redraw = true;
} }
} }
if let Some(frame) = curr_frame.as_ref() { if needs_redraw {
let sync_meta = frame.buffer().get_meta::<gst_gl::GLSyncMeta>().unwrap(); if let Some(frame) = curr_frame.as_ref() {
sync_meta.wait(&app.shared_context); let sync_meta = frame.buffer().get_meta::<gst_gl::GLSyncMeta>().unwrap();
if let Some(texture) = frame.get_texture_id(0) { sync_meta.wait(&shared_context);
gl.draw_frame(texture as gl::types::GLuint); if let Some(texture) = frame.get_texture_id(0) {
gl.draw_frame(texture as gl::types::GLuint);
}
} }
windowed_context.swap_buffers().unwrap();
} }
windowed_context.swap_buffers()?; })
}
app.pipeline.send_event(gst::event::Eos::new());
app.pipeline.set_state(gst::State::Null)?;
Ok(app.into_context())
}
fn cleanup(_windowed_context: glutin::WindowedContext<glutin::PossiblyCurrent>) {
// To ensure that the context stays alive longer than the pipeline or any reference
// inside GStreamer to the GL context, its display or anything else. See
// https://gitlab.freedesktop.org/gstreamer/gstreamer-rs/issues/196
//
// We might do any window/GL specific cleanup here as needed.
} }
fn example_main() { fn example_main() {
match App::new().and_then(main_loop).map(cleanup) { App::new()
Ok(r) => r, .and_then(main_loop)
Err(e) => eprintln!("Error! {}", e), .unwrap_or_else(|e| eprintln!("Error! {}", e))
}
} }
fn main() { fn main() {