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examples: make camerabin test application handle errors when starting up

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Instead of hanging forever in a _get_state() in case an error occurs when
starting up camerabin, bail out and print an error message. Also remove
unnecessary _get_state() when shutting down the pipeline.
This commit is contained in:
Tim-Philipp Müller 2009-12-05 18:16:47 +00:00
parent 7cb7c06b7c
commit 31ab47e03b
1 changed files with 26 additions and 19 deletions
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45
tests/examples/camerabin/gst-camera.c
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@ -326,6 +326,21 @@ my_bus_sync_callback (GstBus * bus, GstMessage * message, gpointer data)
return ret;
}
static void
print_error_message (GstMessage * msg)
{
GError *err = NULL;
gchar *dbg = NULL;
gst_message_parse_error (msg, &err, &dbg);
g_printerr ("Camerabin won't start up!\nError: %s\nDebug Info: %s\n",
err->message, (dbg) ? dbg : "None");
g_error_free (err);
g_free (dbg);
}
static gboolean
my_bus_callback (GstBus * bus, GstMessage * message, gpointer data)
{
@ -341,14 +356,7 @@ my_bus_callback (GstBus * bus, GstMessage * message, gpointer data)
break;
}
case GST_MESSAGE_ERROR:{
GError *err;
gchar *debug;
gst_message_parse_error (message, &err, &debug);
g_print ("Error: %s\n", err->message);
g_error_free (err);
g_free (debug);
print_error_message (message);
me_gst_cleanup_element ();
gtk_main_quit ();
break;
@ -550,6 +558,7 @@ me_gst_setup_pipeline_create_vid_post_bin (const gchar * videopost)
static gboolean
me_gst_setup_pipeline (const gchar * imagepost, const gchar * videopost)
{
GstMessage *msg;
GstBus *bus;
GstCaps *preview_caps;
@ -615,19 +624,18 @@ me_gst_setup_pipeline (const gchar * imagepost, const gchar * videopost)
init_view_finder_resolution_combobox ();
if (GST_STATE_CHANGE_FAILURE ==
gst_element_set_state (gst_camera_bin, GST_STATE_PAUSED)) {
gst_element_set_state (gst_camera_bin, GST_STATE_PLAYING);
msg = gst_bus_timed_pop_filtered (GST_ELEMENT_BUS (gst_camera_bin),
3 * GST_SECOND, GST_MESSAGE_ERROR | GST_MESSAGE_ASYNC_DONE);
if (GST_MESSAGE_TYPE (msg) == GST_MESSAGE_ERROR) {
print_error_message (msg);
gst_message_unref (msg);
goto done;
} else {
gst_element_get_state (gst_camera_bin, NULL, NULL, GST_CLOCK_TIME_NONE);
}
if (GST_STATE_CHANGE_FAILURE ==
gst_element_set_state (gst_camera_bin, GST_STATE_PLAYING)) {
goto done;
} else {
gst_element_get_state (gst_camera_bin, NULL, NULL, GST_CLOCK_TIME_NONE);
}
gst_message_unref (msg);
#ifdef HAVE_GST_PHOTO_IFACE_H
/* Initialize menus to default settings */
@ -653,7 +661,6 @@ me_gst_cleanup_element ()
{
if (gst_camera_bin) {
gst_element_set_state (gst_camera_bin, GST_STATE_NULL);
gst_element_get_state (gst_camera_bin, NULL, NULL, GST_CLOCK_TIME_NONE);
gst_object_unref (gst_camera_bin);
gst_camera_bin = NULL;