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osxvideosink: only create the NS app thread for Cocoa once

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The helper thread for Cocoa, in case no NS run loop is running,
should be started only once and shared across all the instances
running
This commit is contained in:
Andoni Morales Alastruey 2013-07-07 21:14:22 +02:00
parent 7b69f427f1
commit 213fa3af0d
2 changed files with 66 additions and 61 deletions
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25
sys/osxvideo/osxvideosink.h
View file

@ -68,6 +68,12 @@ typedef struct _GstOSXVideoSinkClass GstOSXVideoSinkClass;
#define GST_TYPE_OSXVIDEOBUFFER (gst_osxvideobuffer_get_type())
typedef enum {
GST_OSX_VIDEO_SINK_RUN_LOOP_STATE_NOT_RUNNING = 0,
GST_OSX_VIDEO_SINK_RUN_LOOP_STATE_RUNNING = 1,
GST_OSX_VIDEO_SINK_RUN_LOOP_STATE_UNKNOWN = 2,
} GstOSXVideoSinkRunLoopState;
/* OSXWindow stuff */
struct _GstOSXWindow {
gint width, height;
@ -83,24 +89,19 @@ struct _GstOSXVideoSink {
GstOSXWindow *osxwindow;
void *osxvideosinkobject;
NSView *superview;
NSThread *ns_app_thread;
#ifdef RUN_NS_APP_THREAD
GMutex loop_thread_lock;
GCond loop_thread_cond;
#else
guint cocoa_timeout;
#endif
GMutex mrl_check_lock;
GCond mrl_check_cond;
gboolean mrl_check_done;
gboolean main_run_loop_running;
gboolean app_started;
gboolean keep_par;
gboolean embed;
};
struct _GstOSXVideoSinkClass {
GstVideoSinkClass parent_class;
GstOSXVideoSinkRunLoopState run_loop_state;
#ifdef RUN_NS_APP_THREAD
NSThread *ns_app_thread;
#else
guint cocoa_timeout;
#endif
};
GType gst_osx_video_sink_get_type(void);

102
sys/osxvideo/osxvideosink.m
View file

@ -53,6 +53,8 @@ extern void _CFRunLoopSetCurrent(CFRunLoopRef rl);
extern pthread_t _CFMainPThread;
#endif
static GstStaticPadTemplate gst_osx_video_sink_sink_template_factory =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
@ -76,7 +78,10 @@ enum
};
static void gst_osx_video_sink_osxwindow_destroy (GstOSXVideoSink * osxvideosink);
static GMutex _run_loop_check_mutex;
static GMutex _run_loop_mutex;
static GCond _run_loop_cond;
static GstOSXVideoSinkClass *sink_class = NULL;
static GstVideoSinkClass *parent_class = NULL;
/* Helper to trigger calls from the main thread */
@ -87,7 +92,7 @@ gst_osx_video_sink_call_from_main_thread(GstOSXVideoSink *osxvideosink,
NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
[object performSelector:function onThread:osxvideosink->ns_app_thread
[object performSelector:function onThread:sink_class->ns_app_thread
withObject:data waitUntilDone:waitUntilDone];
[pool release];
}
@ -121,9 +126,6 @@ gst_osx_videosink_check_main_run_loop (GstOSXVideoSink *sink)
/* check if the main run loop is running */
gboolean is_running;
if (sink->mrl_check_done) {
return;
}
/* the easy way */
is_running = [[NSRunLoop mainRunLoop] currentMode] != nil;
if (is_running) {
@ -137,15 +139,15 @@ gst_osx_videosink_check_main_run_loop (GstOSXVideoSink *sink)
GstOSXVideoSinkObject * object = (GstOSXVideoSinkObject *) sink->osxvideosinkobject;
gint64 abstime;
g_mutex_lock (&sink->mrl_check_lock);
g_mutex_lock (&_run_loop_mutex);
[object performSelectorOnMainThread:
@selector(checkMainRunLoop)
withObject:nil waitUntilDone:NO];
/* Wait 100 ms */
abstime = g_get_monotonic_time () + 100 * 1000;
is_running = g_cond_wait_until (&sink->mrl_check_cond,
&sink->mrl_check_lock, abstime);
g_mutex_unlock (&sink->mrl_check_lock);
is_running = g_cond_wait_until (&_run_loop_cond,
&_run_loop_mutex, abstime);
g_mutex_unlock (&_run_loop_mutex);
[pool release];
}
@ -154,8 +156,12 @@ exit:
{
GST_DEBUG_OBJECT(sink, "The main runloop %s is running",
is_running ? "" : " not ");
sink->main_run_loop_running = is_running;
sink->mrl_check_done = TRUE;
if (is_running) {
sink_class->run_loop_state = GST_OSX_VIDEO_SINK_RUN_LOOP_STATE_RUNNING;
sink_class->ns_app_thread = [NSThread mainThread];
} else {
sink_class->run_loop_state = GST_OSX_VIDEO_SINK_RUN_LOOP_STATE_NOT_RUNNING;
}
}
}
@ -168,13 +174,26 @@ gst_osx_video_sink_run_cocoa_loop (GstOSXVideoSink * sink )
* Since the sink needs to create it's own Cocoa window when no
* external NSView is passed to the sink through the GstVideoOverlay API,
* we need to run the cocoa mainloop somehow.
* This run loop can only be started once, by the first sink needing it
*/
if (!sink->main_run_loop_running) {
g_mutex_lock (&_run_loop_check_mutex);
if (sink_class->run_loop_state == GST_OSX_VIDEO_SINK_RUN_LOOP_STATE_UNKNOWN) {
gst_osx_videosink_check_main_run_loop (sink);
}
if (sink_class->run_loop_state == GST_OSX_VIDEO_SINK_RUN_LOOP_STATE_RUNNING) {
g_mutex_unlock (&_run_loop_check_mutex);
return;
}
if (sink_class->ns_app_thread == NULL) {
#ifdef RUN_NS_APP_THREAD
/* run the main runloop in a separate thread */
/* override [NSThread isMainThread] with our own implementation so that we can
* make it believe our dedicated thread is the main thread
* make it believe our dedicated thread is the main thread
*/
Method origIsMainThread = class_getClassMethod([NSThread class],
NSSelectorFromString(@"isMainThread"));
@ -183,30 +202,31 @@ gst_osx_video_sink_run_cocoa_loop (GstOSXVideoSink * sink )
method_exchangeImplementations(origIsMainThread, ourIsMainThread);
sink->ns_app_thread = [[NSThread alloc]
sink_class->ns_app_thread = [[NSThread alloc]
initWithTarget:sink->osxvideosinkobject
selector:@selector(nsAppThread) object:nil];
[sink->ns_app_thread start];
[sink_class->ns_app_thread start];
g_mutex_lock (&sink->loop_thread_lock);
while (!sink->app_started)
g_cond_wait (&sink->loop_thread_cond, &sink->loop_thread_lock);
g_mutex_unlock (&sink->loop_thread_lock);
g_mutex_lock (&_run_loop_mutex);
g_cond_wait (&_run_loop_cond, &_run_loop_mutex);
g_mutex_unlock (&_run_loop_mutex);
#else
/* assume that there is a GMainLoop and iterate the main runloop from there
*/
sink->cocoa_timeout = g_timeout_add (10,
sink_class->cocoa_timeout = g_timeout_add (10,
(GSourceFunc) run_ns_app_loop, NULL);
#endif
}
g_mutex_unlock (&_run_loop_check_mutex);
}
static void
gst_osx_video_sink_stop_cocoa_loop (GstOSXVideoSink * osxvideosink)
{
#ifndef RUN_NS_APP_THREAD
if (osxvideosink->cocoa_timeout)
g_source_remove(osxvideosink->cocoa_timeout);
if (sink_class->cocoa_timeout)
g_source_remove(sink_klass->cocoa_timeout);
#endif
}
@ -250,10 +270,8 @@ gst_osx_video_sink_osxwindow_create (GstOSXVideoSink * osxvideosink, gint width,
GST_INFO_OBJECT (osxvideosink, "'have-ns-view' message sent");
osxvideosink->ns_app_thread = [NSThread mainThread];
gst_osx_videosink_check_main_run_loop (osxvideosink);
gst_osx_video_sink_run_cocoa_loop (osxvideosink);
[osxwindow->gstview setMainThread:osxvideosink->ns_app_thread];
[osxwindow->gstview setMainThread:sink_class->ns_app_thread];
/* check if have-ns-view was handled and osxwindow->gstview was added to a
* superview
@ -408,7 +426,6 @@ gst_osx_video_sink_change_state (GstElement * element,
case GST_STATE_CHANGE_PAUSED_TO_READY:
GST_VIDEO_SINK_WIDTH (osxvideosink) = 0;
GST_VIDEO_SINK_HEIGHT (osxvideosink) = 0;
osxvideosink->app_started = FALSE;
gst_osx_video_sink_osxwindow_destroy (osxvideosink);
break;
case GST_STATE_CHANGE_READY_TO_NULL:
@ -505,15 +522,6 @@ gst_osx_video_sink_init (GstOSXVideoSink * sink)
sink->osxwindow = NULL;
sink->superview = NULL;
sink->osxvideosinkobject = [[GstOSXVideoSinkObject alloc] initWithSink:sink];
#ifdef RUN_NS_APP_THREAD
g_mutex_init (&sink->loop_thread_lock);
g_cond_init (&sink->loop_thread_cond);
#endif
g_mutex_init (&sink->mrl_check_lock);
g_cond_init (&sink->mrl_check_cond);
sink->mrl_check_done = FALSE;
sink->main_run_loop_running = FALSE;
sink->app_started = FALSE;
sink->keep_par = FALSE;
}
@ -541,9 +549,6 @@ gst_osx_video_sink_finalize (GObject *object)
if (osxvideosink->osxvideosinkobject)
[(GstOSXVideoSinkObject*)(osxvideosink->osxvideosinkobject) release];
g_mutex_clear (&osxvideosink->mrl_check_lock);
g_cond_clear (&osxvideosink->mrl_check_cond);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
@ -558,8 +563,11 @@ gst_osx_video_sink_class_init (GstOSXVideoSinkClass * klass)
gstelement_class = (GstElementClass *) klass;
gstbasesink_class = (GstBaseSinkClass *) klass;
parent_class = g_type_class_ref (GST_TYPE_VIDEO_SINK);
sink_class = klass;
klass->run_loop_state = GST_OSX_VIDEO_SINK_RUN_LOOP_STATE_UNKNOWN;
klass->ns_app_thread = NULL;
gobject_class->set_property = gst_osx_video_sink_set_property;
gobject_class->get_property = gst_osx_video_sink_get_property;
@ -675,7 +683,6 @@ gst_osx_video_sink_set_window_handle (GstVideoOverlay * overlay, guintptr handle
@selector(removeFromSuperview:), (id)nil, YES);
}
[osxvideosink->superview release];
}
GST_INFO_OBJECT (osxvideosink, "set xwindow id 0x%lx", window_id);
@ -903,7 +910,6 @@ gst_osx_video_sink_get_type (void)
[osxwindow->win release];
}
}
g_free (osxwindow);
}
[pool release];
@ -913,7 +919,6 @@ gst_osx_video_sink_get_type (void)
-(void) nsAppThread
{
NSAutoreleasePool *pool;
GstOSXVideoSink *sink = osxvideosink;
/* set the main runloop as the runloop for the current thread. This has the
* effect that calling NSApp nextEventMatchingMask:untilDate:inMode:dequeue
@ -931,10 +936,9 @@ gst_osx_video_sink_get_type (void)
[NSApplication sharedApplication];
[NSApp finishLaunching];
g_mutex_lock (&sink->loop_thread_lock);
sink->app_started = TRUE;
g_cond_signal (&sink->loop_thread_cond);
g_mutex_unlock (&sink->loop_thread_lock);
g_mutex_lock (&_run_loop_mutex);
g_cond_signal (&_run_loop_cond);
g_mutex_unlock (&_run_loop_mutex);
/* run the loop */
run_ns_app_loop ();
@ -945,9 +949,9 @@ gst_osx_video_sink_get_type (void)
-(void) checkMainRunLoop
{
g_mutex_lock (&osxvideosink->mrl_check_lock);
g_cond_signal (&osxvideosink->mrl_check_cond);
g_mutex_unlock (&osxvideosink->mrl_check_lock);
g_mutex_lock (&_run_loop_mutex);
g_cond_signal (&_run_loop_cond);
g_mutex_unlock (&_run_loop_mutex);
}
@end