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Media crate
This commit is contained in:
Fernando Jiménez Moreno
parent
2b3a8bf490
commit
7d589ed4f5
23 changed files with 152 additions and 128 deletions
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@ -16,7 +16,5 @@ mod raqote_backend;
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pub mod canvas_data;
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pub mod canvas_paint_thread;
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pub mod gl_context;
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mod media_mode;
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pub mod media_thread;
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mod webgl_mode;
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pub mod webgl_thread;
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@ -1,83 +0,0 @@
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at https://mozilla.org/MPL/2.0/. */
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use crate::media_thread::{GLPlayerExternalImageApi, GLPlayerExternalImageHandler, GLPlayerThread};
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use canvas_traits::media::glplayer_channel;
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use canvas_traits::media::{
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GLPlayerChan, GLPlayerMsg, GLPlayerPipeline, GLPlayerReceiver, GLPlayerSender,
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};
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use euclid::Size2D;
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/// GLPlayer Threading API entry point that lives in the constellation.
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pub struct GLPlayerThreads(GLPlayerSender<GLPlayerMsg>);
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impl GLPlayerThreads {
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pub fn new() -> (GLPlayerThreads, Box<dyn webrender::ExternalImageHandler>) {
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let channel = GLPlayerThread::start();
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let external =
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GLPlayerExternalImageHandler::new(GLPlayerExternalImages::new(channel.clone()));
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(GLPlayerThreads(channel), Box::new(external))
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}
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/// Gets the GLPlayerThread handle for each script pipeline.
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pub fn pipeline(&self) -> GLPlayerPipeline {
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// This mode creates a single thread, so the existing
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// GLPlayerChan is just cloned.
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GLPlayerPipeline(GLPlayerChan(self.0.clone()))
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}
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/// Sends an exit message to close the GLPlayerThreads
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pub fn exit(&self) -> Result<(), &'static str> {
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self.0
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.send(GLPlayerMsg::Exit)
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.map_err(|_| "Failed to send Exit message")
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}
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}
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/// Bridge between the webrender::ExternalImage callbacks and the
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/// GLPlayerThreads.
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struct GLPlayerExternalImages {
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// @FIXME(victor): this should be added when GstGLSyncMeta is
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// added
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//webrender_gl: Rc<dyn gl::Gl>,
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glplayer_channel: GLPlayerSender<GLPlayerMsg>,
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// Used to avoid creating a new channel on each received WebRender
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// request.
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lock_channel: (
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GLPlayerSender<(u32, Size2D<i32>, usize)>,
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GLPlayerReceiver<(u32, Size2D<i32>, usize)>,
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),
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}
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impl GLPlayerExternalImages {
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fn new(channel: GLPlayerSender<GLPlayerMsg>) -> Self {
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Self {
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glplayer_channel: channel,
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lock_channel: glplayer_channel().unwrap(),
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}
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}
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}
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impl GLPlayerExternalImageApi for GLPlayerExternalImages {
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fn lock(&mut self, id: u64) -> (u32, Size2D<i32>) {
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// The GLPlayerMsgForward::Lock message inserts a fence in the
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// GLPlayer command queue.
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self.glplayer_channel
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.send(GLPlayerMsg::Lock(id, self.lock_channel.0.clone()))
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.unwrap();
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let (image_id, size, _gl_sync) = self.lock_channel.1.recv().unwrap();
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// The next glWaitSync call is run on the WR thread and it's
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// used to synchronize the two flows of OpenGL commands in
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// order to avoid WR using a semi-ready GLPlayer texture.
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// glWaitSync doesn't block WR thread, it affects only
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// internal OpenGL subsystem.
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//self.webrender_gl
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// .wait_sync(gl_sync as gl::GLsync, 0, gl::TIMEOUT_IGNORED);
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(image_id, size)
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}
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fn unlock(&mut self, id: u64) {
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self.glplayer_channel.send(GLPlayerMsg::Unlock(id)).unwrap();
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}
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}
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@ -1,6 +0,0 @@
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at https://mozilla.org/MPL/2.0/. */
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mod inprocess;
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pub use self::inprocess::GLPlayerThreads;
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@ -1,140 +0,0 @@
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at https://mozilla.org/MPL/2.0/. */
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use canvas_traits::media::*;
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use euclid::Size2D;
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use fnv::FnvHashMap;
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use std::thread;
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/// GL player threading API entry point that lives in the
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/// constellation.
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///
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/// It allows to get a GLPlayerThead handle for each script pipeline.
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pub use crate::media_mode::GLPlayerThreads;
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/// A GLPlayerThrx1ead manages the life cycle and message multiplexign of
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/// a set of video players with GL render.
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pub struct GLPlayerThread {
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// Map of live players.
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players: FnvHashMap<u64, GLPlayerSender<GLPlayerMsgForward>>,
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/// Id generator for new WebGLContexts.
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next_player_id: u64,
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}
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impl GLPlayerThread {
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pub fn new() -> Self {
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GLPlayerThread {
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players: Default::default(),
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next_player_id: 1,
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}
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}
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pub fn start() -> GLPlayerSender<GLPlayerMsg> {
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let (sender, receiver) = glplayer_channel::<GLPlayerMsg>().unwrap();
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thread::Builder::new()
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.name("GLPlayerThread".to_owned())
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.spawn(move || {
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let mut renderer = GLPlayerThread::new();
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loop {
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let msg = receiver.recv().unwrap();
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let exit = renderer.handle_msg(msg);
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if exit {
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return;
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}
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}
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})
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.expect("Thread spawning failed");
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sender
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}
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/// Handles a generic WebGLMsg message
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#[inline]
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fn handle_msg(&mut self, msg: GLPlayerMsg) -> bool {
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trace!("processing {:?}", msg);
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match msg {
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GLPlayerMsg::RegisterPlayer(sender) => {
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let id = self.next_player_id;
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self.players.insert(id, sender.clone());
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sender.send(GLPlayerMsgForward::PlayerId(id)).unwrap();
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self.next_player_id += 1;
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},
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GLPlayerMsg::UnregisterPlayer(id) => {
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if self.players.remove(&id).is_none() {
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warn!("Tried to remove an unknown player");
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}
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},
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GLPlayerMsg::Lock(id, handler_sender) => {
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self.players.get(&id).map(|sender| {
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sender.send(GLPlayerMsgForward::Lock(handler_sender)).ok();
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});
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},
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GLPlayerMsg::Unlock(id) => {
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self.players.get(&id).map(|sender| {
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sender.send(GLPlayerMsgForward::Unlock()).ok();
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});
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},
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GLPlayerMsg::Exit => return true,
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}
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false
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}
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}
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/// This trait is used as a bridge between the `GLPlayerThreads`
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/// implementation and the WR ExternalImageHandler API implemented in
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/// the `GLPlayerExternalImageHandler` struct.
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//
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/// `GLPlayerExternalImageHandler<T>` takes care of type conversions
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/// between WR and GLPlayer info (e.g keys, uvs).
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//
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/// It uses this trait to notify lock/unlock messages and get the
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/// required info that WR needs.
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//
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/// `GLPlayerThreads` receives lock/unlock message notifications and
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/// takes care of sending the unlock/lock messages to the appropiate
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/// `GLPlayerThread`.
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pub trait GLPlayerExternalImageApi {
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fn lock(&mut self, id: u64) -> (u32, Size2D<i32>);
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fn unlock(&mut self, id: u64);
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}
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/// WebRender External Image Handler implementation
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pub struct GLPlayerExternalImageHandler<T: GLPlayerExternalImageApi> {
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handler: T,
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}
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impl<T: GLPlayerExternalImageApi> GLPlayerExternalImageHandler<T> {
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pub fn new(handler: T) -> Self {
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Self { handler: handler }
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}
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}
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impl<T: GLPlayerExternalImageApi> webrender::ExternalImageHandler
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for GLPlayerExternalImageHandler<T>
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{
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/// Lock the external image. Then, WR could start to read the
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/// image content.
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/// The WR client should not change the image content until the
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/// unlock() call.
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fn lock(
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&mut self,
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key: webrender_api::ExternalImageId,
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_channel_index: u8,
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_rendering: webrender_api::ImageRendering,
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) -> webrender::ExternalImage {
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let (texture_id, size) = self.handler.lock(key.0);
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webrender::ExternalImage {
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uv: webrender_api::TexelRect::new(0.0, 0.0, size.width as f32, size.height as f32),
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source: webrender::ExternalImageSource::NativeTexture(texture_id),
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}
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}
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/// Unlock the external image. The WR should not read the image
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/// content after this call.
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fn unlock(&mut self, key: webrender_api::ExternalImageId, _channel_index: u8) {
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self.handler.unlock(key.0);
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}
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}
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