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Until gcc and GNUStep properly support Objective-C blocks and other "new" features of Objective-C we can't properly support them without making the code much more ugly. https://bugzilla.gnome.org/show_bug.cgi?id=739152
233 lines
6.6 KiB
Objective-C
Executable file
233 lines
6.6 KiB
Objective-C
Executable file
/*
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* GStreamer
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* Copyright (C) 2009 Julien Isorce <julien.isorce@gmail.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 under 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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#include <Cocoa/Cocoa.h>
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#include <gst/gst.h>
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#include <gst/video/videooverlay.h>
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/* ============================================================= */
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/* */
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/* MainWindow */
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/* */
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/* ============================================================= */
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@interface MainWindow: NSWindow {
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GMainLoop *m_loop;
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GstElement *m_pipeline;
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gboolean m_isClosed;
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}
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- (id) initWithContentRect:(NSRect) contentRect Loop:(GMainLoop*)loop Pipeline:(GstElement*)pipeline;
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- (GMainLoop*) loop;
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- (GstElement*) pipeline;
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- (gboolean) isClosed;
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@end
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@implementation MainWindow
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- (id) initWithContentRect:(NSRect)contentRect Loop:(GMainLoop*)loop Pipeline:(GstElement*)pipeline
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{
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m_loop = loop;
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m_pipeline = pipeline;
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m_isClosed = FALSE;
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self = [super initWithContentRect: contentRect
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styleMask: (NSTitledWindowMask | NSClosableWindowMask | NSResizableWindowMask | NSMiniaturizableWindowMask)
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backing: NSBackingStoreBuffered defer: NO screen: nil];
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[self setReleasedWhenClosed:NO];
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[NSApp setDelegate:self];
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[self setTitle:@"gst-plugins-gl implements videooverlay interface"];
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return self;
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}
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- (GMainLoop*) loop {
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return m_loop;
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}
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- (GstElement*) pipeline {
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return m_pipeline;
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}
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- (gboolean) isClosed {
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return m_isClosed;
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}
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- (void) customClose {
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m_isClosed = TRUE;
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}
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- (BOOL) windowShouldClose:(id)sender {
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gst_element_send_event (m_pipeline, gst_event_new_eos ());
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return YES;
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}
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- (void) applicationDidFinishLaunching: (NSNotification *) not {
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[self makeMainWindow];
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[self center];
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[self orderFront:self];
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}
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- (BOOL) applicationShouldTerminateAfterLastWindowClosed:(NSApplication *)app {
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return NO;
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}
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@end
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/* ============================================================= */
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/* */
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/* gstreamer callbacks */
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/* */
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/* ============================================================= */
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static GstBusSyncReply create_window (GstBus* bus, GstMessage* message, MainWindow* window)
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{
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// ignore anything but 'prepare-window-handle' element messages
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if (GST_MESSAGE_TYPE (message) != GST_MESSAGE_ELEMENT)
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return GST_BUS_PASS;
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if (!gst_is_video_overlay_prepare_window_handle_message (message))
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return GST_BUS_PASS;
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g_print ("setting window handle %lud\n", (gulong) window);
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gst_video_overlay_set_window_handle (GST_VIDEO_OVERLAY (GST_MESSAGE_SRC (message)), (guintptr) [window contentView]);
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gst_message_unref (message);
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return GST_BUS_DROP;
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}
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static void end_stream_cb(GstBus* bus, GstMessage* message, MainWindow* window)
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{
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NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
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g_print ("end of stream\n");
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gst_element_set_state ([window pipeline], GST_STATE_NULL);
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gst_object_unref ([window pipeline]);
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g_main_loop_quit ([window loop]);
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[window performSelectorOnMainThread:@selector(customClose) withObject:nil waitUntilDone:YES];
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[pool release];
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}
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static gpointer thread_func (MainWindow* window)
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{
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g_main_loop_run ([window loop]);
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return NULL;
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}
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/* ============================================================= */
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/* */
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/* application */
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/* */
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/* ============================================================= */
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int main(int argc, char **argv)
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{
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int width = 640;
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int height = 480;
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GMainLoop *loop = NULL;
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GstElement *pipeline = NULL;
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GstElement *videosrc = NULL;
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GstElement *videosink = NULL;
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GstCaps *caps=NULL;
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gboolean ok=FALSE;
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GstBus *bus=NULL;
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GThread *loop_thread=NULL;
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NSAutoreleasePool *pool=nil;
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NSRect rect;
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MainWindow *window=nil;
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g_print("app created\n");
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gst_init (&argc, &argv);
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loop = g_main_loop_new (NULL, FALSE);
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pipeline = gst_pipeline_new ("pipeline");
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videosrc = gst_element_factory_make ("videotestsrc", "videotestsrc");
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videosink = gst_element_factory_make ("glimagesink", "glimagesink");
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g_object_set(G_OBJECT(videosrc), "num-buffers", 500, NULL);
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gst_bin_add_many (GST_BIN (pipeline), videosrc, videosink, NULL);
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caps = gst_caps_new_simple("video/x-raw",
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"width", G_TYPE_INT, width,
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"height", G_TYPE_INT, height,
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"framerate", GST_TYPE_FRACTION, 25, 1,
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"format", G_TYPE_STRING, "I420",
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NULL);
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ok = gst_element_link_filtered(videosrc, videosink, caps);
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gst_caps_unref(caps);
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if (!ok)
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g_warning("could not link videosrc to videosink\n");
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pool = [[NSAutoreleasePool alloc] init];
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[NSApplication sharedApplication];
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rect.origin.x = 0; rect.origin.y = 0;
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rect.size.width = width; rect.size.height = height;
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window = [[MainWindow alloc] initWithContentRect:rect Loop:loop Pipeline:pipeline];
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bus = gst_pipeline_get_bus (GST_PIPELINE (pipeline));
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gst_bus_add_signal_watch (bus);
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g_signal_connect(bus, "message::error", G_CALLBACK(end_stream_cb), window);
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g_signal_connect(bus, "message::warning", G_CALLBACK(end_stream_cb), window);
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g_signal_connect(bus, "message::eos", G_CALLBACK(end_stream_cb), window);
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gst_bus_set_sync_handler (bus, (GstBusSyncHandler) create_window, window, NULL);
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gst_object_unref (bus);
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loop_thread = g_thread_new (NULL,
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(GThreadFunc) thread_func, window);
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gst_element_set_state (pipeline, GST_STATE_PLAYING);
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[window orderFront:window];
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while (![window isClosed]) {
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NSEvent *event = [NSApp nextEventMatchingMask:NSAnyEventMask
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untilDate:[NSDate dateWithTimeIntervalSinceNow:1]
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inMode:NSDefaultRunLoopMode dequeue:YES];
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if (event)
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[NSApp sendEvent:event];
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}
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g_thread_join (loop_thread);
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[window release];
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[pool release];
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return 0;
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}
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