[aravis] viewer: display something now.

[Emmanuel Pacaud <emmanuel src gnome org>]

commit 05e9d94d1d57b132b16d70fcf0789f5b648ff7b7
Author: Emmanuel Pacaud <emmanuel gnome org>
Date:   Mon Jan 3 23:06:45 2011 +0100

    viewer: display something now.

 configure.ac         |    4 +-
 viewer/arv-viewer.ui |   10 +++-
 viewer/arvviewer.c   |  139 ++++++++++++++++++++++++++++++++++++++++++++++++--
 3 files changed, 145 insertions(+), 8 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 184008f..0e19d96 100644
--- a/configure.ac
+++ b/configure.ac
@@ -68,9 +68,9 @@ AM_CONDITIONAL(ARAVIS_WITH_GTK, test "x$with_gtk" = "xyes")
 
 with_gstreamer=no
 if test "x$enable_gstreamer" = "xyes"; then
-	PKG_CHECK_MODULES([GSTREAMER],   [gstreamer-base-0.10 >= 0.10],
+	PKG_CHECK_MODULES([GSTREAMER],   [gstreamer-base-0.10 >= 0.10 gstreamer-app-0.10 gstreamer-interfaces-0.10],
 			  [AC_DEFINE([ARAVIS_WITH_GSTREAMER], [1], [Cairo support])
-			  ARAVIS_EXTRA_REQUIRES="${ARAVIS_EXTRA_REQUIRES} [gstreamer-base-0.10 >= 0.10]"
+			  ARAVIS_EXTRA_REQUIRES="${ARAVIS_EXTRA_REQUIRES} [gstreamer-base-0.10 >= 0.10 gstreamer-app-0.10 gstreamer-interfaces-0.10]"
 			  with_gstreamer=yes],
 			  [echo -n])
 fi
diff --git a/viewer/arv-viewer.ui b/viewer/arv-viewer.ui
index 6528f53..fe09722 100644
--- a/viewer/arv-viewer.ui
+++ b/viewer/arv-viewer.ui
@@ -1,8 +1,9 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <interface>
-  <!-- interface-requires gtk+ 2.10 -->
+  <!-- interface-requires gtk+ 2.12 -->
   <!-- interface-naming-policy project-wide -->
   <object class="GtkWindow" id="main_window">
+    <property name="title" translatable="yes">Aravis</property>
     <child>
       <object class="GtkVBox" id="vbox1">
         <property name="visible">True</property>
@@ -210,5 +211,10 @@
       </object>
     </child>
   </object>
-  <object class="GtkListStore" id="camera_liststore"/>
+  <object class="GtkListStore" id="camera_liststore">
+    <columns>
+      <!-- column-name device_id -->
+      <column type="gchar"/>
+    </columns>
+  </object>
 </interface>
diff --git a/viewer/arvviewer.c b/viewer/arvviewer.c
index 2782528..6f9a2a2 100644
--- a/viewer/arvviewer.c
+++ b/viewer/arvviewer.c
@@ -1,14 +1,75 @@
 #include <gtk/gtk.h>
+#include <gst/gst.h>
+#include <gst/app/gstappsrc.h>
+#include <gst/interfaces/xoverlay.h>
+#include <gdk/gdkx.h>
+#include <arv.h>
 #include <stdlib.h>
 
+typedef struct {
+	GstElement *appsrc;
+
+	guint64 timestamp_offset;
+	guint64 last_timestamp;
+} CallbackData;
+
+void
+new_buffer_cb (ArvStream *stream, CallbackData *data)
+{
+	ArvBuffer *arv_buffer;
+	GstBuffer *buffer;
+
+	arv_buffer = arv_stream_pop_buffer (stream);
+	if (arv_buffer == NULL)
+		return;
+
+	buffer = gst_buffer_new ();
+
+	GST_BUFFER_DATA (buffer) = arv_buffer->data;
+	GST_BUFFER_MALLOCDATA (buffer) = NULL;
+	GST_BUFFER_SIZE (buffer) = arv_buffer->size;
+
+	if (data->timestamp_offset == 0) {
+		data->timestamp_offset = arv_buffer->timestamp_ns;
+		data->last_timestamp = arv_buffer->timestamp_ns;
+	}
+
+	GST_BUFFER_TIMESTAMP (buffer) = arv_buffer->timestamp_ns - data->timestamp_offset;
+	GST_BUFFER_DURATION (buffer) = arv_buffer->timestamp_ns - data->last_timestamp;
+
+	gst_app_src_push_buffer (GST_APP_SRC (data->appsrc), buffer);
+
+	arv_stream_push_buffer (stream, arv_buffer);
+}
+
 int
 main (int argc,char *argv[])
 {
 	GtkBuilder *builder;
-	GtkWidget *window;
+	GtkWidget *widget;
+	GtkListStore *list_store;
+	GtkCellRenderer *cell;
+	GtkTreeIter iter;
+	ArvCamera *camera;
+	ArvStream *stream;
+	GstElement *pipeline;
+	GstElement *appsrc;
+	GstElement *ffmpegcolorspace;
+	GstElement *ximagesink;
+	GstCaps *caps;
+	char *camera_id;
 	char *ui_filename;
+	unsigned int n_devices;
+	unsigned int i;
+	unsigned int payload;
+	int width;
+	int height;
+	unsigned int frame_rate;
+	CallbackData data;
+	gulong window_xid;
 
 	gtk_init (&argc, &argv);
+	gst_init (&argc, &argv);
 
 	builder = gtk_builder_new ();
 
@@ -16,15 +77,85 @@ main (int argc,char *argv[])
 	gtk_builder_add_from_file (builder, ui_filename, NULL);
 	g_free (ui_filename);
 
-	window = GTK_WIDGET (gtk_builder_get_object (builder, "main_window"));
+	widget = GTK_WIDGET (gtk_builder_get_object (builder, "main_window"));
+
+	g_signal_connect (widget, "destroy", G_CALLBACK (gtk_main_quit), NULL);
 
-	g_signal_connect (window, "destroy", G_CALLBACK (gtk_main_quit), NULL);
+	gtk_widget_show_all (widget);
 
-	gtk_widget_show_all (window);
+	widget = GTK_WIDGET (gtk_builder_get_object (builder, "camera_combobox"));
+	list_store = gtk_list_store_new (1, G_TYPE_STRING);
+	gtk_combo_box_set_model (GTK_COMBO_BOX (widget), GTK_TREE_MODEL (list_store));
+	arv_update_device_list ();
+	n_devices = arv_get_n_devices ();
+	for (i = 0; i < n_devices; i++) {
+		gtk_list_store_append (list_store, &iter);
+		gtk_list_store_set (list_store, &iter, 0, arv_get_device_id (i), -1);
+	}
+	if (n_devices > 0)
+		gtk_combo_box_set_active (GTK_COMBO_BOX (widget), 0);
+	if (n_devices <= 1)
+		gtk_widget_set_sensitive (widget, FALSE);
+
+	cell = gtk_cell_renderer_text_new ();
+	gtk_cell_layout_pack_start (GTK_CELL_LAYOUT (widget), cell, TRUE);
+	gtk_cell_layout_set_attributes (GTK_CELL_LAYOUT (widget), cell, "text", 0, NULL);
+
+
+	gtk_combo_box_get_active_iter (GTK_COMBO_BOX (widget), &iter);
+	gtk_tree_model_get (GTK_TREE_MODEL (list_store), &iter, 0, &camera_id, -1);
+	camera = arv_camera_new (camera_id);
+	g_free (camera_id);
+
+	stream = arv_camera_create_stream (camera, NULL, NULL);
+	arv_stream_set_emit_signals (stream, TRUE);
+	payload = arv_camera_get_payload (camera);
+	for (i = 0; i < 50; i++)
+		arv_stream_push_buffer (stream, arv_buffer_new (payload, NULL));
+
+	arv_camera_get_region (camera, NULL, NULL, &width, &height);
+	frame_rate = (unsigned int) (double) (0.5 + arv_camera_get_frame_rate (camera));
+
+	arv_camera_start_acquisition (camera);
+
+	pipeline = gst_pipeline_new ("pipeline");
+
+	appsrc = gst_element_factory_make ("appsrc", "appsrc");
+	ffmpegcolorspace = gst_element_factory_make ("ffmpegcolorspace", "ffmpegcolorspace");
+	ximagesink = gst_element_factory_make ("xvimagesink", "xvimagesink");
+	g_object_set (ximagesink, "force-aspect-ratio", TRUE, NULL);
+	gst_bin_add_many (GST_BIN (pipeline), appsrc, ffmpegcolorspace, ximagesink, NULL);
+	gst_element_link_many (appsrc, ffmpegcolorspace, ximagesink, NULL);
+	caps = gst_caps_new_simple ("video/x-raw-gray",
+				    "bpp", G_TYPE_INT, 8,
+				    "depth", G_TYPE_INT, 8,
+				    "endianness", G_TYPE_INT, G_BIG_ENDIAN,
+				    "width", G_TYPE_INT, width,
+				    "height", G_TYPE_INT, height,
+				    "framerate", GST_TYPE_FRACTION, frame_rate, 1,
+				    "pixel-aspect-ratio", GST_TYPE_FRACTION, 1, 1,
+				    NULL);
+	gst_app_src_set_caps (GST_APP_SRC (appsrc), caps);
+	gst_caps_unref (caps);
+	gst_element_set_state (pipeline, GST_STATE_PLAYING);
+
+	widget = GTK_WIDGET (gtk_builder_get_object (builder, "video_drawingarea"));
+	window_xid = GDK_WINDOW_XID (widget->window);
+	gst_x_overlay_set_xwindow_id (GST_X_OVERLAY (ximagesink), window_xid);
+
+	data.appsrc = appsrc;
+	data.timestamp_offset = 0;
+	data.last_timestamp = 0;
+	g_signal_connect (stream, "new-buffer", G_CALLBACK (new_buffer_cb), &data);
 
 	g_object_unref (builder);
 
 	gtk_main ();
 
+	arv_camera_stop_acquisition (camera);
+	g_object_unref (stream);
+
+	g_object_unref (camera);
+
 	return EXIT_SUCCESS;
 }