mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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390 lines
11 KiB
Objective-C
390 lines
11 KiB
Objective-C
/*
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* GStreamer
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* Copyright (C) 2014 Sebastian Dröge <sebastian@centricular.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it un der the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library 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 GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#import <OpenGLES/EAGL.h>
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#import <QuartzCore/QuartzCore.h>
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#import <UIKit/UIKit.h>
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#include "gstglwindow_eagl.h"
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#include "gstglcontext_eagl.h"
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#include "gstglios_utils.h"
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#define GST_CAT_DEFAULT gst_gl_window_eagl_debug
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GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT);
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#define GST_GL_WINDOW_EAGL_LAYER(obj) \
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((__bridge CAEAGLLayer *)(obj->priv->layer))
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#define GST_GL_WINDOW_EAGL_QUEUE(obj) \
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((__bridge dispatch_queue_t)(obj->priv->gl_queue))
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static void gst_gl_window_eagl_finalize (GObject * object);
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static guintptr gst_gl_window_eagl_get_display (GstGLWindow * window);
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static guintptr gst_gl_window_eagl_get_window_handle (GstGLWindow * window);
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static void gst_gl_window_eagl_set_window_handle (GstGLWindow * window,
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guintptr handle);
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static void gst_gl_window_eagl_set_preferred_size (GstGLWindow * window,
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gint width, gint height);
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static void gst_gl_window_eagl_draw (GstGLWindow * window);
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static void gst_gl_window_eagl_send_message_async (GstGLWindow * window,
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GstGLWindowCB callback, gpointer data, GDestroyNotify destroy);
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static void gst_gl_window_eagl_quit (GstGLWindow *window);
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struct _GstGLWindowEaglPrivate
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{
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gboolean pending_set_window_handle;
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gpointer external_view;
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gpointer internal_view;
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gpointer layer;
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CGFloat window_width, window_height;
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gint preferred_width, preferred_height;
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gpointer gl_queue;
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GMutex draw_lock;
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GCond cond;
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gboolean shutting_down;
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GstGLContext *last_context;
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};
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#define DEBUG_INIT \
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GST_DEBUG_CATEGORY_GET (GST_CAT_DEFAULT, "glwindow");
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#define gst_gl_window_eagl_parent_class parent_class
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G_DEFINE_TYPE_WITH_CODE (GstGLWindowEagl, gst_gl_window_eagl,
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GST_TYPE_GL_WINDOW, G_ADD_PRIVATE (GstGLWindowEagl) DEBUG_INIT);
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static void
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gst_gl_window_eagl_class_init (GstGLWindowEaglClass * klass)
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{
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GObjectClass *gobject_class = (GObjectClass *) klass;
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GstGLWindowClass *window_class = (GstGLWindowClass *) klass;
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gobject_class->finalize = gst_gl_window_eagl_finalize;
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window_class->get_display =
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GST_DEBUG_FUNCPTR (gst_gl_window_eagl_get_display);
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window_class->get_window_handle =
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GST_DEBUG_FUNCPTR (gst_gl_window_eagl_get_window_handle);
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window_class->set_window_handle =
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GST_DEBUG_FUNCPTR (gst_gl_window_eagl_set_window_handle);
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window_class->draw = GST_DEBUG_FUNCPTR (gst_gl_window_eagl_draw);
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window_class->set_preferred_size =
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GST_DEBUG_FUNCPTR (gst_gl_window_eagl_set_preferred_size);
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window_class->send_message_async =
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GST_DEBUG_FUNCPTR (gst_gl_window_eagl_send_message_async);
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window_class->quit = GST_DEBUG_FUNCPTR (gst_gl_window_eagl_quit);
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}
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static void
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gst_gl_window_eagl_init (GstGLWindowEagl * window)
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{
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window->priv = gst_gl_window_eagl_get_instance_private (window);
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window->priv->gl_queue =
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(__bridge_retained gpointer)dispatch_queue_create ("org.freedesktop.gstreamer.glwindow", NULL);
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g_mutex_init (&window->priv->draw_lock);
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g_cond_init (&window->priv->cond);
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}
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static void
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gst_gl_window_eagl_finalize (GObject * object)
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{
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GstGLWindowEagl *window = GST_GL_WINDOW_EAGL (object);
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if (window->priv->layer)
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CFRelease (window->priv->layer);
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window->priv->layer = NULL;
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CFRelease(window->priv->gl_queue);
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g_mutex_clear (&window->priv->draw_lock);
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g_cond_clear (&window->priv->cond);
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G_OBJECT_CLASS (parent_class)->finalize (object);
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}
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/* Must be called in the gl thread */
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GstGLWindowEagl *
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gst_gl_window_eagl_new (GstGLDisplay * display)
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{
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GstGLWindowEagl *window;
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/* there isn't an eagl display type */
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window = g_object_new (GST_TYPE_GL_WINDOW_EAGL, NULL);
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gst_object_ref_sink (window);
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return window;
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}
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static guintptr
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gst_gl_window_eagl_get_display (GstGLWindow * window)
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{
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return 0;
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}
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static guintptr
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gst_gl_window_eagl_get_window_handle (GstGLWindow * window)
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{
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return (guintptr) GST_GL_WINDOW_EAGL (window)->priv->internal_view;
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}
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static void
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_create_gl_window (GstGLWindowEagl * window_eagl)
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{
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GstGLWindowEaglPrivate *priv = window_eagl->priv;
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UIView *external_view;
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CGRect rect;
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GstGLUIView *view;
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g_mutex_lock (&priv->draw_lock);
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external_view = (__bridge UIView *) priv->external_view;
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rect = CGRectMake (0, 0, external_view.frame.size.width, external_view.frame.size.height);
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window_eagl->priv->window_width = rect.size.width;
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window_eagl->priv->window_height = rect.size.height;
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view = [[GstGLUIView alloc] initWithFrame:rect];
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[view setGstWindow:window_eagl];
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view.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
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view.contentMode = UIViewContentModeRedraw;
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priv->internal_view = (__bridge_retained gpointer) view;
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[external_view addSubview:view];
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priv->internal_view = (__bridge_retained gpointer) view;
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priv->layer = (__bridge_retained gpointer) [view layer];
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NSDictionary * dict = [NSDictionary dictionaryWithObjectsAndKeys:
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[NSNumber numberWithBool:NO], kEAGLDrawablePropertyRetainedBacking,
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kEAGLColorFormatRGBA8, kEAGLDrawablePropertyColorFormat, nil];
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[[view layer] setOpaque:YES];
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[(CAEAGLLayer *) [view layer] setDrawableProperties:dict];
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g_cond_broadcast (&priv->cond);
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g_mutex_unlock (&priv->draw_lock);
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}
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static void
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ensure_window_handle_is_set_unlocked (GstGLWindowEagl * window_eagl)
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{
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GstGLContext *context;
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if (!window_eagl->priv->pending_set_window_handle)
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return;
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context = gst_gl_window_get_context (GST_GL_WINDOW (window_eagl));
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if (!context) {
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g_critical ("Window does not have a GstGLContext attached!. "
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"Aborting set window handle.");
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g_mutex_unlock (&window_eagl->priv->draw_lock);
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return;
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}
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while (!window_eagl->priv->internal_view)
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g_cond_wait (&window_eagl->priv->cond, &window_eagl->priv->draw_lock);
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GST_INFO_OBJECT (context, "handle set, updating layer");
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gst_gl_context_eagl_update_layer (context, window_eagl->priv->layer);
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gst_object_unref (context);
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window_eagl->priv->pending_set_window_handle = FALSE;
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}
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static void
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gst_gl_window_eagl_set_window_handle (GstGLWindow * window, guintptr handle)
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{
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GstGLWindowEagl *window_eagl;
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window_eagl = GST_GL_WINDOW_EAGL (window);
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g_mutex_lock (&window_eagl->priv->draw_lock);
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if (window_eagl->priv->external_view)
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CFRelease (window_eagl->priv->external_view);
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window_eagl->priv->external_view = (gpointer)handle;
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window_eagl->priv->pending_set_window_handle = TRUE;
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g_mutex_unlock (&window_eagl->priv->draw_lock);
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/* XXX: Maybe we need an async set_window_handle? */
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_gl_invoke_on_main ((GstGLWindowEaglFunc) _create_gl_window,
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gst_object_ref (window_eagl), gst_object_unref);
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}
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static void
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gst_gl_window_eagl_quit (GstGLWindow * window)
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{
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GstGLWindowEagl *window_eagl = (GstGLWindowEagl *) window;
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window_eagl->priv->shutting_down = TRUE;
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GST_GL_WINDOW_CLASS (parent_class)->quit (window);
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}
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static void
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gst_gl_window_eagl_set_preferred_size (GstGLWindow * window, gint width, gint height)
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{
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GstGLWindowEagl *window_eagl = GST_GL_WINDOW_EAGL (window);
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window_eagl->priv->preferred_width = width;
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window_eagl->priv->preferred_height = height;
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}
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static void
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gst_gl_window_eagl_send_message_async (GstGLWindow * window,
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GstGLWindowCB callback, gpointer data, GDestroyNotify destroy)
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{
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GstGLWindowEagl *window_eagl = (GstGLWindowEagl *) window;
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GstGLContext *context = gst_gl_window_get_context (window);
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GstGLContext *unref_context = NULL;
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GThread *thread;
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if (context)
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window_eagl->priv->last_context = unref_context = context;
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/* we may not have a context if we are shutting down */
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if (!context && window_eagl->priv->shutting_down) {
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context = window_eagl->priv->last_context;
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window_eagl->priv->shutting_down = FALSE;
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}
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g_return_if_fail (context != NULL);
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thread = gst_gl_context_get_thread (context);
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if (thread == g_thread_self()) {
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/* this case happens for nested calls happening from inside the GCD queue */
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callback (data);
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if (destroy)
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destroy (data);
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if (unref_context)
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gst_object_unref (unref_context);
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} else {
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dispatch_async ((__bridge dispatch_queue_t)(window_eagl->priv->gl_queue), ^{
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gst_gl_context_activate (context, TRUE);
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callback (data);
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if (unref_context)
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gst_object_unref (unref_context);
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if (destroy)
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destroy (data);
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});
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}
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if (thread)
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g_thread_unref (thread);
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}
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static void
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draw_cb (gpointer data)
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{
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GstGLWindowEagl *window_eagl = data;
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GstGLWindow *window = GST_GL_WINDOW (window_eagl);
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GstGLContext *context = gst_gl_window_get_context (window);
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GstGLContextEagl *eagl_context = GST_GL_CONTEXT_EAGL (context);
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g_mutex_lock (&window_eagl->priv->draw_lock);
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ensure_window_handle_is_set_unlocked (window_eagl);
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if (window_eagl->priv->internal_view) {
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CGSize size;
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CAEAGLLayer *eagl_layer;
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eagl_layer = GST_GL_WINDOW_EAGL_LAYER (window_eagl);
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size = eagl_layer.frame.size;
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size = CGSizeMake (size.width * eagl_layer.contentsScale, size.height * eagl_layer.contentsScale);
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if (window->queue_resize || window_eagl->priv->window_width != size.width ||
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window_eagl->priv->window_height != size.height) {
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window_eagl->priv->window_width = size.width;
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window_eagl->priv->window_height = size.height;
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gst_gl_context_eagl_resize (eagl_context);
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gst_gl_window_resize (window, window_eagl->priv->window_width,
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window_eagl->priv->window_height);
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}
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}
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gst_gl_context_eagl_prepare_draw (eagl_context);
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if (window->draw)
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window->draw (window->draw_data);
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gst_gl_context_swap_buffers (context);
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gst_gl_context_eagl_finish_draw (eagl_context);
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g_mutex_unlock (&window_eagl->priv->draw_lock);
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gst_object_unref (context);
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}
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static void
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gst_gl_window_eagl_draw (GstGLWindow * window)
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{
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gst_gl_window_send_message (window, (GstGLWindowCB) draw_cb, window);
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}
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gpointer
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gst_gl_window_eagl_get_layer (GstGLWindowEagl * window_eagl)
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{
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gpointer layer;
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g_mutex_lock (&window_eagl->priv->draw_lock);
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if (window_eagl->priv->layer)
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CFRetain (window_eagl->priv->layer);
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layer = window_eagl->priv->layer;
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g_mutex_unlock (&window_eagl->priv->draw_lock);
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return layer;
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}
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@implementation GstGLUIView {
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GstGLWindowEagl * window_eagl;
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};
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+(Class) layerClass
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{
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return [CAEAGLLayer class];
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}
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-(void) setGstWindow:(GstGLWindowEagl *) window
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{
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window_eagl = window;
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}
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@end
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void
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_gl_invoke_on_main (GstGLWindowEaglFunc func, gpointer data, GDestroyNotify notify)
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{
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if ([NSThread isMainThread]) {
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func (data);
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if (notify)
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notify (data);
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} else {
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dispatch_async (dispatch_get_main_queue (), ^{
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func (data);
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if (notify)
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notify (data);
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});
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}
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}
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