From: Antonio Ospite <ospite@studenti.unina.it>
Date: Thu, 24 Oct 2013 12:47:29 +0000 (+0200)
Subject: Add a c/ subdir for experiments with the C API
X-Git-Url: https://git.ao2.it/experiments/gstreamer.git/commitdiff_plain/9371b7d21875e6a8ae1c79765e462b77fef0c601

Add a c/ subdir for experiments with the C API
---

diff --git a/c/gst-basic-example/Makefile b/c/gst-basic-example/Makefile
new file mode 100644
index 0000000..f1e87cb
--- /dev/null
+++ b/c/gst-basic-example/Makefile
@@ -0,0 +1,39 @@
+CFLAGS = -std=c99 -pedantic -pedantic-errors -Wall -g3 -O2 -D_ANSI_SOURCE_
+CFLAGS += -fno-common \
+	  -Wall \
+	  -Wdeclaration-after-statement \
+	  -Wextra \
+	  -Wformat=2 \
+	  -Winit-self \
+	  -Winline \
+	  -Wpacked \
+	  -Wp,-D_FORTIFY_SOURCE=2 \
+	  -Wpointer-arith \
+	  -Wlarger-than-65500 \
+	  -Wmissing-declarations \
+	  -Wmissing-format-attribute \
+	  -Wmissing-noreturn \
+	  -Wmissing-prototypes \
+	  -Wnested-externs \
+	  -Wold-style-definition \
+	  -Wredundant-decls \
+	  -Wsign-compare \
+	  -Wstrict-aliasing=2 \
+	  -Wstrict-prototypes \
+	  -Wundef \
+	  -Wunreachable-code \
+	  -Wunsafe-loop-optimizations \
+	  -Wunused-but-set-variable \
+	  -Wwrite-strings
+
+CFLAGS += $(shell pkg-config --cflags gstreamer-1.0)
+LDLIBS += $(shell pkg-config --libs gstreamer-1.0)
+
+gst-basic-example: gst-basic-example.o
+
+clean:
+	rm -f *~ *.o  gst-basic-example
+
+test: gst-basic-example
+	G_DEBUG=gc-friendly G_SLICE=always-malloc \
+	valgrind --leak-check=full --show-reachable=yes ./gst-basic-example
diff --git a/c/gst-basic-example/gst-basic-example.c b/c/gst-basic-example/gst-basic-example.c
new file mode 100644
index 0000000..5c0ffce
--- /dev/null
+++ b/c/gst-basic-example/gst-basic-example.c
@@ -0,0 +1,97 @@
+/* gst-basic-example - basic example program for the GStreamer 1,0 API
+ *
+ * Copyright (C) 2013  Antonio Ospite <ospite@studenti.unina.it>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <gst/gst.h>
+
+static gboolean on_message(GstBus *bus, GstMessage *message, gpointer user_data)
+{
+	GMainLoop *loop = (GMainLoop *)user_data;
+
+	switch (GST_MESSAGE_TYPE(message)) {
+	case GST_MESSAGE_ERROR:
+		g_error("Got ERROR");
+		g_main_loop_quit(loop);
+		break;
+	case GST_MESSAGE_WARNING:
+		g_warning("Got WARNING");
+		g_main_loop_quit(loop);
+		break;
+	case GST_MESSAGE_EOS:
+		g_main_loop_quit(loop);
+		break;
+	default:
+		break;
+	}
+
+	return TRUE;
+}
+
+int main(void)
+{
+	GstElement *pipeline, *src, *capsfilter, *conv, *sink;
+	GstCaps *caps;
+	GstBus *bus;
+	GMainLoop *loop;
+	int ret;
+
+	gst_init(NULL, NULL);
+
+	pipeline = gst_element_factory_make("pipeline", NULL);
+
+	src = gst_element_factory_make("videotestsrc", NULL);
+
+	caps = gst_caps_from_string("video/x-raw,format=AYUV,width=800,height=480");
+
+	capsfilter = gst_element_factory_make("capsfilter", NULL);
+	g_object_set(G_OBJECT(capsfilter), "caps", caps, NULL);
+
+	conv = gst_element_factory_make("videoconvert", NULL);
+
+	sink = gst_element_factory_make("autovideosink", NULL);
+	g_return_val_if_fail(sink != NULL, -1);
+
+	gst_bin_add_many(GST_BIN(pipeline), src, capsfilter, conv, sink, NULL);
+	ret = gst_element_link_many(src, capsfilter, conv, sink, NULL);
+	if (!ret) {
+		g_error("Failed to link elements");
+		return -2;
+	}
+
+	loop = g_main_loop_new(NULL, FALSE);
+
+	bus = gst_pipeline_get_bus(GST_PIPELINE(pipeline));
+	gst_bus_add_signal_watch(bus);
+	g_signal_connect(G_OBJECT(bus), "message", G_CALLBACK(on_message),
+			 loop);
+	gst_object_unref(GST_OBJECT(bus));
+
+	ret = gst_element_set_state(pipeline, GST_STATE_PLAYING);
+	if (ret == GST_STATE_CHANGE_FAILURE) {
+		g_error("Failed to go into PLAYING state");
+		return -3;
+	}
+
+	g_main_loop_run(loop);
+
+	gst_element_set_state(pipeline, GST_STATE_NULL);
+
+	g_main_loop_unref(loop);
+	gst_object_unref(pipeline);
+
+	return 0;
+}