mirror of
https://github.com/mpv-player/mpv
synced 2024-12-26 09:02:38 +00:00
4873b32c59
Finish renaming directories and moving files. Adjust all include
statements to make the previous commit compile.
The two commits are separate, because git is bad at tracking renames
and content changes at the same time.
Also take this as an opportunity to remove the separation between
"common" and "mplayer" sources in the Makefile. ("common" used to be
shared between mplayer and mencoder.)
138 lines
4.8 KiB
Objective-C
138 lines
4.8 KiB
Objective-C
/*
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* Cocoa Event Handling
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*
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* This file is part of mplayer2.
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*
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* mplayer2 is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* mplayer2 is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with mplayer2. If not, see <http://www.gnu.org/licenses/>.
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*/
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/*
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* Implementation details:
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* This file deals with custom event polling on MacOSX. When mplayer2 is paused
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* it will asynchronously poll for events using select. This works correctly on
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* Linux with X11 since the events are notified through the file descriptors
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* where mplayer2 is listening on. On the other hand, the OSX window server
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* notifies the processes for events using mach ports.
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*
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* The code below uses functionality from Cocoa that abstracts the async polling
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* of events from the window server. When a Cocoa event comes in, the polling is
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* interrupted and the event is dealt with in the next vo_check_events.
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*
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* To keep the select fd polling code working, that functionality is executed
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* from another thread. Whoever finishes polling before the given time, be it
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* Cocoa or the original select code, notifies the other for an immediate wake.
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*/
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#include "cocoa_events.h"
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#include "video/out/cocoa_common.h"
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#include "talloc.h"
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#import <Cocoa/Cocoa.h>
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#include <dispatch/dispatch.h>
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// Bogus event subtype to wake the Cocoa code from polling state
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#define MP_EVENT_SUBTYPE_WAKE_EVENTLOOP 100
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// This is the threshold in milliseconds below which the Cocoa polling is not
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// executed. There is some overhead caused by the synchronization between
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// threads. Even if in practice it isn't noticeable, we try to avoid the useless
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// waste of resources.
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#define MP_ASYNC_THRESHOLD 50
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struct priv {
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dispatch_queue_t select_queue;
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bool is_runloop_polling;
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void (*read_all_fd_events)(struct input_ctx *ictx, int time);
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};
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static struct priv *p;
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static void cocoa_wait_events(int mssleeptime)
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{
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NSTimeInterval sleeptime = mssleeptime / 1000.0;
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NSEvent *event;
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p->is_runloop_polling = YES;
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event = [NSApp nextEventMatchingMask:NSAnyEventMask
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untilDate:[NSDate dateWithTimeIntervalSinceNow:sleeptime]
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inMode:NSEventTrackingRunLoopMode dequeue:NO];
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// dequeue the next event if it is a fake to wake the cocoa polling
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if (event && [event type] == NSApplicationDefined &&
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[event subtype] == MP_EVENT_SUBTYPE_WAKE_EVENTLOOP) {
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[NSApp nextEventMatchingMask:NSAnyEventMask untilDate:nil
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inMode:NSEventTrackingRunLoopMode dequeue:YES];
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}
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p->is_runloop_polling = NO;
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}
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static void cocoa_wake_runloop()
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{
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if (p->is_runloop_polling) {
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NSAutoreleasePool *pool = [NSAutoreleasePool new];
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NSEvent *event;
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/* Post an event so we'll wake the run loop that is async polling */
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event = [NSEvent otherEventWithType: NSApplicationDefined
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location: NSZeroPoint
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modifierFlags: 0
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timestamp: 0
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windowNumber: 0
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context: nil
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subtype: MP_EVENT_SUBTYPE_WAKE_EVENTLOOP
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data1: 0
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data2: 0];
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[NSApp postEvent:event atStart:NO];
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[pool release];
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}
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}
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void cocoa_events_init(struct input_ctx *ictx,
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void (*read_all_fd_events)(struct input_ctx *ictx, int time))
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{
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NSApplicationLoad();
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p = talloc_ptrtype(NULL, p);
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*p = (struct priv){
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.is_runloop_polling = NO,
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.read_all_fd_events = read_all_fd_events,
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.select_queue = dispatch_queue_create("org.mpv.select_queue",
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NULL),
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};
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}
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void cocoa_events_uninit(void)
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{
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talloc_free(p);
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}
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void cocoa_events_read_all_events(struct input_ctx *ictx, int time)
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{
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// don't bother delegating the select to the async queue if the blocking
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// time is really low or if we are not running a GUI
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if (time > MP_ASYNC_THRESHOLD && vo_cocoa_gui_running()) {
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dispatch_async(p->select_queue, ^{
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p->read_all_fd_events(ictx, time);
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cocoa_wake_runloop();
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});
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cocoa_wait_events(time);
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mp_input_wakeup(ictx);
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// wait for the async queue to get empty.
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dispatch_sync(p->select_queue, ^{});
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} else {
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p->read_all_fd_events(ictx, time);
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}
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}
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