--- /dev/null
+/* GStreamer
+ * Copyright (C) 2015 Vanessa Chipirrás <vchipirras6@gmail.com>
+ *
+ * gstfacedetect_test: gsteramer facedetect plugin demo application,
+ * part work of Outreachy 2015 project
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <gst/gst.h>
+
+GstElement *playbin, *pipeline;
+GstElement *v4l2src, *videoscale, *videoconvert_in, *facedetect,
+ *videoconvert_out, *autovideosink;
+
+static GstBusSyncReply
+bus_sync_handler (GstBus * bus, GstMessage * message, GstPipeline * pipeline)
+{
+ const GstStructure *structure;
+ const GValue *value;
+ const GstStructure *faces_structure;
+ const GValue *faces_value;
+ gboolean have_mouth_x, have_mouth_y;
+ gboolean have_nose_x, have_nose_y;
+ gchar *contents;
+ gint i;
+ guint size = 0;
+ gdouble volume = 0.0;
+
+ /* select msg */
+ if (GST_MESSAGE_TYPE (message) != GST_MESSAGE_ELEMENT ||
+ !gst_structure_has_name (gst_message_get_structure (message),
+ "facedetect"))
+ return GST_BUS_PASS;
+
+ /* parse msg structure */
+ structure = gst_message_get_structure (message);
+
+ /* if facedetect is into buffer */
+ if (structure &&
+ strcmp (gst_structure_get_name (structure), "facedetect") == 0) {
+ /* print message type and structure name */
+ g_print ("Type message, name message: %s{{%s}}\n",
+ gst_message_type_get_name (message->type),
+ gst_structure_get_name (structure));
+ /* print msg structure names&type */
+ for (i = 0; i < gst_structure_n_fields (structure); i++) {
+ const gchar *name = gst_structure_nth_field_name (structure, i);
+ GType type = gst_structure_get_field_type (structure, name);
+ g_print ("-Name field, type: %s[%s]\n", name, g_type_name (type));
+ }
+ g_print ("\n");
+
+ /* get structure of faces */
+ value = gst_structure_get_value (structure, "faces");
+ /* obtain the contents into the structure */
+ contents = g_strdup_value_contents (value);
+ g_print ("Detected objects: %s\n", *(&contents));
+
+ /* list size */
+ size = gst_value_list_get_size (value);
+
+ /* if face is detected, obtain the values X and Y of mouth and of nose. */
+ if (size != 0) {
+ faces_value = gst_value_list_get_value (value, 0);
+ faces_structure = gst_value_get_structure (faces_value);
+ have_mouth_y = gst_structure_has_field (faces_structure, "mouth->y");
+ have_mouth_x = gst_structure_has_field (faces_structure, "mouth->x");
+ have_nose_y = gst_structure_has_field (faces_structure, "nose->y");
+ have_nose_x = gst_structure_has_field (faces_structure, "nose->x");
+
+ /* get the volume value and playbin changed the state to play */
+ g_object_get (G_OBJECT (playbin), "volume", &volume, NULL);
+ gst_element_set_state (GST_ELEMENT (playbin), GST_STATE_PLAYING);
+
+ /* media operation - hide your mouth for down the volume of the video */
+ if (have_mouth_y == 0 && have_mouth_x == 0) {
+ volume = volume - 0.5;
+ if (volume <= 0.5)
+ volume = 0.0;
+ g_object_set (G_OBJECT (playbin), "volume", volume, NULL);
+ }
+ /* media operation - hide your nose for up the volume of the video */
+ if (have_nose_y == 0 && have_nose_x == 0) {
+ volume = volume + 0.5;
+ if (volume >= 9.5)
+ volume = 10.0;
+ g_object_set (G_OBJECT (playbin), "volume", volume, NULL);
+ }
+ /* if face is not detected */
+ } else {
+ /* media operation - hide your face to stop media play */
+ gst_element_set_state (playbin, GST_STATE_PAUSED);
+ }
+ }
+ gst_message_unref (message);
+ return GST_BUS_DROP;
+}
+
+int
+main (gint argc, gchar ** argv)
+{
+ static GMainLoop *loop;
+ GstCaps *caps;
+ GstBus *bus;
+ gchar *uri;
+
+ const gchar *video_device = "/dev/video0";
+
+ if (argc < 2) {
+ fprintf (stderr, "oops, please give a file to play\n");
+ return -1;
+ }
+
+ uri = g_filename_to_uri (argv[1], NULL, NULL);
+ if (!uri) {
+ fprintf (stderr, "failed to create the uri\n");
+ return -1;
+ }
+
+ /* init gst */
+ gst_init (&argc, &argv);
+
+ loop = g_main_loop_new (NULL, FALSE);
+ /* init elements */
+ playbin = gst_element_factory_make ("playbin", "app_playbin");
+ pipeline = gst_pipeline_new ("app_pipeline");
+ v4l2src = gst_element_factory_make ("v4l2src", "app_v4l2src");
+ videoscale = gst_element_factory_make ("videoscale", "app_videoscale");
+ videoconvert_in =
+ gst_element_factory_make ("videoconvert", "app_videoconvert_in");
+ facedetect = gst_element_factory_make ("facedetect", "app_facedetect");
+ videoconvert_out =
+ gst_element_factory_make ("videoconvert", "app_videoconvert_out");
+ autovideosink =
+ gst_element_factory_make ("autovideosink", "app_autovideosink");
+
+ /* check init results */
+ if (!playbin || !pipeline || !v4l2src || !videoscale || !videoconvert_in
+ || !facedetect || !videoconvert_out || !autovideosink)
+ g_error ("ERROR: element init failed.\n");
+
+ /* set values */
+ g_object_set (G_OBJECT (playbin), "uri", uri, NULL);
+ g_object_set (G_OBJECT (v4l2src), "device", video_device, NULL);
+
+ /* set caps */
+ caps =
+ gst_caps_from_string
+ ("video/x-raw, format=(string)RGB, width=320, height=240, framerate=(fraction)30/1");
+
+ /* set bus */
+ bus = gst_pipeline_get_bus (GST_PIPELINE (pipeline));
+ gst_bus_set_sync_handler (bus, (GstBusSyncHandler) bus_sync_handler, pipeline,
+ NULL);
+ gst_object_unref (bus);
+
+ /* add elements to pipeline */
+ gst_bin_add_many (GST_BIN (pipeline),
+ v4l2src,
+ videoscale,
+ videoconvert_in, facedetect, videoconvert_out, autovideosink, NULL);
+
+ /* negotiate caps */
+ if (!gst_element_link_filtered (v4l2src, videoscale, caps)) {
+ g_printerr ("ERROR:v4l2src -> videoscale caps\n");
+ return 0;
+ }
+ gst_caps_unref (caps);
+
+ /* link elements */
+ gst_element_link_many (videoscale,
+ videoconvert_in, facedetect, videoconvert_out, autovideosink, NULL);
+
+ /* change states */
+ gst_element_set_state (pipeline, GST_STATE_PLAYING);
+
+ /* start main loop */
+ g_main_loop_run (loop);
+
+ /* clean all */
+ gst_element_set_state (pipeline, GST_STATE_NULL);
+ gst_object_unref (GST_OBJECT (pipeline));
+ gst_element_set_state (playbin, GST_STATE_NULL);
+ gst_object_unref (GST_OBJECT (playbin));
+
+ return 0;
+}
projects / platform / upstream / gst-plugins-bad.git / commitdiff