mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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e505f6257c
Renders buffers using the CALayer subclass AVSampleBufferDisplayLayer which can be placed inside a Core Animation render tree.
124 lines
3.4 KiB
Objective-C
124 lines
3.4 KiB
Objective-C
/*
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* GStreamer
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* Copyright (C) 2015 Matthew Waters <matthew@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 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 <gst/gst.h>
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#include <Cocoa/Cocoa.h>
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#include <QuartzCore/QuartzCore.h>
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#include <CoreFoundation/CoreFoundation.h>
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#include <CoreMedia/CoreMedia.h>
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static NSRunLoop *loop;
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static int quit = 0;
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static void
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end_stream_cb(GstBus* bus, GstMessage* message, GstElement* pipeline)
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{
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switch (GST_MESSAGE_TYPE (message))
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{
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case GST_MESSAGE_EOS:
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g_print ("End of stream\n");
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g_atomic_int_set (&quit, 1);;
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CFRunLoopStop ([loop getCFRunLoop]);
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break;
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case GST_MESSAGE_ERROR:
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{
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gchar *debug = NULL;
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GError *err = NULL;
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gst_message_parse_error (message, &err, &debug);
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g_print ("Error: %s\n", err->message);
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g_error_free (err);
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if (debug)
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{
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g_print ("Debug details: %s\n", debug);
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g_free (debug);
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}
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g_atomic_int_set (&quit, 1);;
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CFRunLoopStop ([loop getCFRunLoop]);
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break;
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}
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default:
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break;
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}
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}
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gint main (gint argc, gchar *argv[])
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{
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CALayer *layer;
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loop = [NSRunLoop currentRunLoop];
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gst_init (&argc, &argv);
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[NSApplication sharedApplication];
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GstElement* pipeline = gst_pipeline_new ("pipeline");
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GstElement* videosrc = gst_element_factory_make ("videotestsrc", NULL);
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GstElement* videosink = gst_element_factory_make ("avsamplebufferlayersink", NULL);
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GstCaps *caps = gst_caps_from_string ("video/x-raw,format=UYVY");
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gst_bin_add_many (GST_BIN (pipeline), videosrc, videosink, NULL);
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gboolean link_ok = gst_element_link_filtered (videosrc, videosink, caps);
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gst_caps_unref (caps);
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if (!link_ok) {
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g_critical ("Failed to link an element!\n") ;
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return -1;
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}
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g_object_set (videosrc, "num-buffers", 500, NULL);
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GstBus* bus = gst_pipeline_get_bus (GST_PIPELINE (pipeline));
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gst_element_set_state (pipeline, GST_STATE_READY);
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gst_element_get_state (pipeline, NULL, NULL, GST_CLOCK_TIME_NONE);
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g_object_get (videosink, "layer", &layer, NULL);
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NSWindow *window = [[NSWindow alloc] initWithContentRect:NSMakeRect (0, 0, 320, 240)
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styleMask:NSBorderlessWindowMask backing:NSBackingStoreBuffered defer:NO];
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[window setOpaque:NO];
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[window.contentView setWantsLayer:YES];
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NSView *view = [window.contentView superview];
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[view setLayer:layer];
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gst_element_set_state(pipeline, GST_STATE_PLAYING);
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[window orderFront:window];
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while (!g_atomic_int_get (&quit) && [loop runMode:NSDefaultRunLoopMode
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beforeDate:[NSDate distantPast]]) {
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GstMessage *msg;
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while ((msg = gst_bus_timed_pop (bus, 1 * GST_MSECOND)))
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end_stream_cb (bus, msg, pipeline);
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}
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gst_element_set_state (pipeline, GST_STATE_NULL);
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gst_object_unref (bus);
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gst_object_unref (pipeline);
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return 0;
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}
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