gnome-control-center/capplets/sound/pipeline-tests.c

/* -*- mode: c; style: linux -*- */
/* -*- c-basic-offset: 2 -*- */

/* pipeline-tests.c
 * Copyright (C) 2002 Jan Schmidt
 * Copyright (C) 2005 Tim-Philipp Müller <tim centricular net>
 * Copyright (C) 2006 Jürg Billeter <j@bitron.ch>
 *
 * Written by: Jan Schmidt <thaytan@mad.scientist.com>
 *
 * 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, 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, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
 * 02111-1307, USA.
 */
#ifdef HAVE_CONFIG_H
#  include <config.h>
#endif

#include <locale.h>
#include <string.h>
#include <gnome.h>
#include <glade/glade.h>
#include <gtk/gtk.h>
#include <gst/gst.h>

#include "pipeline-tests.h"
#define WID(s) glade_xml_get_widget (interface_xml, s)
static gint timeout_tag;

static GstElement *gst_test_pipeline;

static void pipeline_error_dlg (GtkWindow * parent,
    const gchar * pipeline, const gchar * error_message);

/* User responded in the dialog */
static void
user_test_pipeline_response (GtkDialog * widget, gint response_id,
    GladeXML * dialog)
{
  /* Close the window causing the test to end */
  gtk_widget_hide (GTK_WIDGET (widget));
}

/* Timer timeout has been occurred */
static gint
user_test_pipeline_timeout (gpointer data)
{
  gtk_progress_bar_pulse (GTK_PROGRESS_BAR (data));
  return TRUE;
}

/* Build the pipeline */
static gboolean
build_test_pipeline (const gchar * pipeline, GError ** p_err)
{
  gst_test_pipeline = gst_parse_launch (pipeline, p_err);

  if (*p_err == NULL && gst_test_pipeline != NULL)
    return TRUE;
  
  return FALSE;
}

static void
pipeline_error_dlg (GtkWindow * parent,
    const gchar * pipeline, const gchar * error_message)
{
  gchar *errstr;

  if (error_message) {
    errstr = g_strdup_printf ("%s: %s", pipeline, error_message);
  } else {
    errstr = g_strdup_printf (_("Failed to construct test pipeline for '%s'"),
        pipeline);
  }

  if (parent == NULL) {
    g_printerr ("%s", errstr);
  } else {
    GtkWidget *dialog;

    dialog = gtk_message_dialog_new (parent,
        GTK_DIALOG_DESTROY_WITH_PARENT,
        GTK_MESSAGE_ERROR, GTK_BUTTONS_CLOSE, "%s", errstr);

    gtk_dialog_run (GTK_DIALOG (dialog));
    gtk_widget_destroy (dialog);
  }

  g_free (errstr);
}

/* Construct and run the pipeline. Use the indicated parent
 * for any user interaction window.
 */
void
user_test_pipeline (GladeXML * interface_xml,
    GtkWindow * parent, const gchar * pipeline)
{
  GstStateChangeReturn ret;
  GtkDialog *dialog = NULL;
  GstMessage *msg;
  GError *err = NULL;
  GstBus *bus;

  gst_test_pipeline = NULL;

  /* Build the pipeline */
  if (!build_test_pipeline (pipeline, &err)) {
    /* Show the error pipeline */
    pipeline_error_dlg (parent, pipeline, (err) ? err->message : NULL);
    if (err)
      g_error_free (err);
    return;
  }

  /* Setup the 'click ok when done' dialog */
  if (parent) {
    dialog = GTK_DIALOG (WID ("test_pipeline"));
    /* g_return_if_fail(dialog != NULL); */
    gtk_window_set_modal (GTK_WINDOW (dialog), TRUE);
    gtk_window_set_transient_for (GTK_WINDOW (dialog), parent);
    g_signal_connect (G_OBJECT (dialog), "response",
        (GCallback) user_test_pipeline_response, interface_xml);
  }

  /* Start the pipeline and wait for max. 3 seconds for it to start up */
  gst_element_set_state (gst_test_pipeline, GST_STATE_PLAYING);
  ret = gst_element_get_state (gst_test_pipeline, NULL, NULL, 3 * GST_SECOND);

  /* Check if any error messages were posted on the bus */
  bus = gst_element_get_bus (gst_test_pipeline);
  msg = gst_bus_poll (bus, GST_MESSAGE_ERROR, 0);
  gst_object_unref (bus);

  if (msg != NULL) {
    gchar *dbg = NULL;

    gst_message_parse_error (msg, &err, &dbg);
    gst_message_unref (msg);

    g_message ("Error running pipeline '%s': %s [%s]", pipeline,
        (err) ? err->message : "(null error)",
        (dbg) ? dbg : "no additional debugging details");
    pipeline_error_dlg (parent, pipeline, err->message);
    g_error_free (err);
    g_free (dbg);
  } else if (ret != GST_STATE_CHANGE_SUCCESS) {
    pipeline_error_dlg (parent, pipeline, NULL);
  } else {
    /* Show the dialog */
    if (dialog) {
      gtk_window_present (GTK_WINDOW (dialog));
      timeout_tag =
          gtk_timeout_add (50, user_test_pipeline_timeout,
          WID ("test_pipeline_progress"));
      gtk_dialog_run (GTK_DIALOG (dialog));
      gtk_timeout_remove (timeout_tag);
      gtk_widget_hide (GTK_WIDGET (dialog));
    } else {
      gint secs;

      /* A bit hacky: No parent dialog, run in limited test mode */
      for (secs = 0; secs < 5; ++secs) {
        g_print (".");
        g_usleep (G_USEC_PER_SEC);      /* 1 second */
      }
    }
  }

  if (gst_test_pipeline) {
    gst_element_set_state (gst_test_pipeline, GST_STATE_NULL);
    gst_object_unref (gst_test_pipeline);
    gst_test_pipeline = NULL;
  }
}