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#include <Cocoa/Cocoa.h>
#include <gst/gst.h>
#include <gst/video/videooverlay.h>
/* ============================================================= */
/* */
/* MainWindow */
/* */
/* ============================================================= */
@interface MainWindow: NSWindow {
GMainLoop *m_loop;
GstElement *m_pipeline;
gboolean m_isClosed;
}
- (id) initWithContentRect:(NSRect) contentRect Loop:(GMainLoop*)loop Pipeline:(GstElement*)pipeline;
- (GMainLoop*) loop;
- (GstElement*) pipeline;
- (gboolean) isClosed;
@end
@implementation MainWindow
- (id) initWithContentRect:(NSRect)contentRect Loop:(GMainLoop*)loop Pipeline:(GstElement*)pipeline
{
m_loop = loop;
m_pipeline = pipeline;
m_isClosed = FALSE;
self = [super initWithContentRect: contentRect
styleMask: (NSTitledWindowMask | NSClosableWindowMask | NSResizableWindowMask | NSMiniaturizableWindowMask)
backing: NSBackingStoreBuffered defer: NO screen: nil];
[self setReleasedWhenClosed:NO];
[NSApp setDelegate:self];
[self setTitle:@"gst-plugins-gl implements videooverlay interface"];
return self;
}
- (GMainLoop*) loop {
return m_loop;
}
- (GstElement*) pipeline {
return m_pipeline;
}
- (gboolean) isClosed {
return m_isClosed;
}
- (void) customClose {
m_isClosed = TRUE;
}
- (BOOL) windowShouldClose:(id)sender {
gst_element_send_event (m_pipeline, gst_event_new_eos ());
return YES;
}
- (void) applicationDidFinishLaunching: (NSNotification *) not {
[self makeMainWindow];
[self center];
[self orderFront:self];
}
- (BOOL) applicationShouldTerminateAfterLastWindowClosed:(NSApplication *)app {
return NO;
}
@end
/* ============================================================= */
/* */
/* gstreamer callbacks */
/* */
/* ============================================================= */
static GstBusSyncReply create_window (GstBus* bus, GstMessage* message, MainWindow* window)
{
// ignore anything but 'prepare-window-handle' element messages
if (GST_MESSAGE_TYPE (message) != GST_MESSAGE_ELEMENT)
return GST_BUS_PASS;
if (!gst_is_video_overlay_prepare_window_handle_message (message))
return GST_BUS_PASS;
g_print ("setting window handle %lud\n", (gulong) window);
gst_video_overlay_set_window_handle (GST_VIDEO_OVERLAY (GST_MESSAGE_SRC (message)), (guintptr) window);
gst_message_unref (message);
return GST_BUS_DROP;
}
static void end_stream_cb(GstBus* bus, GstMessage* message, MainWindow* window)
{
NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
g_print ("end of stream\n");
gst_element_set_state ([window pipeline], GST_STATE_NULL);
gst_object_unref ([window pipeline]);
g_main_loop_quit ([window loop]);
[window performSelectorOnMainThread:@selector(customClose) withObject:nil waitUntilDone:YES];
[pool release];
}
static gpointer thread_func (MainWindow* window)
{
#ifdef GNUSTEP
GSRegisterCurrentThread();
#endif
g_main_loop_run ([window loop]);
#ifdef GNUSTEP
GSUnregisterCurrentThread();
#endif
return NULL;
}
/* ============================================================= */
/* */
/* application */
/* */
/* ============================================================= */
int main(int argc, char **argv)
{
int width = 640;
int height = 480;
GMainLoop *loop = NULL;
GstElement *pipeline = NULL;
GstElement *videosrc = NULL;
GstElement *videosink = NULL;
GstCaps *caps=NULL;
gboolean ok=FALSE;
GstBus *bus=NULL;
GThread *loop_thread=NULL;
NSAutoreleasePool *pool=nil;
NSRect rect;
MainWindow *window=nil;
#ifdef GNUSTEP
GstState state;
#endif
g_print("app created\n");
gst_init (&argc, &argv);
loop = g_main_loop_new (NULL, FALSE);
pipeline = gst_pipeline_new ("pipeline");
videosrc = gst_element_factory_make ("videotestsrc", "videotestsrc");
videosink = gst_element_factory_make ("glimagesink", "glimagesink");
g_object_set(G_OBJECT(videosrc), "num-buffers", 500, NULL);
gst_bin_add_many (GST_BIN (pipeline), videosrc, videosink, NULL);
caps = gst_caps_new_simple("video/x-raw",
"width", G_TYPE_INT, width,
"height", G_TYPE_INT, height,
"framerate", GST_TYPE_FRACTION, 25, 1,
"format", G_TYPE_STRING, "I420",
NULL);
ok = gst_element_link_filtered(videosrc, videosink, caps);
gst_caps_unref(caps);
if (!ok)
g_warning("could not link videosrc to videosink\n");
#ifdef GNUSTEP
gst_element_set_state (pipeline, GST_STATE_PAUSED);
state = GST_STATE_PAUSED;
gst_element_get_state (pipeline, &state, &state, GST_CLOCK_TIME_NONE);
g_print("pipeline paused\n");
GSRegisterCurrentThread();
#endif
pool = [[NSAutoreleasePool alloc] init];
#ifndef GNUSTEP
[NSApplication sharedApplication];
#endif
rect.origin.x = 0; rect.origin.y = 0;
rect.size.width = width; rect.size.height = height;
window = [[MainWindow alloc] initWithContentRect:rect Loop:loop Pipeline:pipeline];
bus = gst_pipeline_get_bus (GST_PIPELINE (pipeline));
gst_bus_add_signal_watch (bus);
g_signal_connect(bus, "message::error", G_CALLBACK(end_stream_cb), window);
g_signal_connect(bus, "message::warning", G_CALLBACK(end_stream_cb), window);
g_signal_connect(bus, "message::eos", G_CALLBACK(end_stream_cb), window);
gst_bus_set_sync_handler (bus, (GstBusSyncHandler) create_window, window, NULL);
gst_object_unref (bus);
loop_thread = g_thread_new (NULL,
(GThreadFunc) thread_func, window);
gst_element_set_state (pipeline, GST_STATE_PLAYING);
[window orderFront:window];
#ifndef GNUSTEP
while (![window isClosed]) {
NSEvent *event = [NSApp nextEventMatchingMask:NSAnyEventMask
untilDate:[NSDate dateWithTimeIntervalSinceNow:1]
inMode:NSDefaultRunLoopMode dequeue:YES];
if (event)
[NSApp sendEvent:event];
}
#endif
g_thread_join (loop_thread);
[window release];
[pool release];
#ifdef GNUSTEP
GSUnregisterCurrentThread();
#endif
return 0;
}
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