Add a c/ subdir for experiments with the C API

[experiments/gstreamer.git] / c / gst-basic-example / gst-basic-example.c

diff --git a/c/gst-basic-example/gst-basic-example.c b/c/gst-basic-example/gst-basic-example.c
new file mode 100644 (file)
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+++ b/c/gst-basic-example/gst-basic-example.c
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+/* 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;
+}