commit 6c0e339787d156291d18787fefeb1991f39bd015
Author: David Mohr <david@mcbf.net>
Date:   Fri Jul 17 00:20:02 2015 -0600

    Use gstreamer discoverer api to get track duration

diff --git a/README b/README
index a0741e2..93feb2b 100644
--- a/README
+++ b/README
@@ -78,7 +78,7 @@ Optional, but highly recommended
                also for automatic disc unmounting)
  * thunar-vfs (required for drag and drop from other applications, icons and 
                automatic disc unmounting)
- * gstreamer  (0.10+, required for burning audio CDs from compressed music
+ * gstreamer  (1.0+, required for burning audio CDs from compressed music
                files)
     * gstreamer pbutils (they usually come with gstreamer as far as I know)
     * gstreamer plugins (look for the good, the bad and the ugly plugin pack,
diff --git a/xfburn/xfburn-error.h b/xfburn/xfburn-error.h
index 59f5acc..b2d2f9b 100644
--- a/xfburn/xfburn-error.h
+++ b/xfburn/xfburn-error.h
@@ -38,6 +38,7 @@ typedef enum
   XFBURN_ERROR_GST_CREATION,
   XFBURN_ERROR_GST_STATE,
   XFBURN_ERROR_GST_TIMEOUT,
+  XFBURN_ERROR_GST_DISCOVERER,
   XFBURN_ERROR_PIPE,
   XFBURN_ERROR_GST_NO_AUDIO,
   XFBURN_ERROR_TOO_MANY_AUDIO_TRACKS,
diff --git a/xfburn/xfburn-transcoder-gst.c b/xfburn/xfburn-transcoder-gst.c
index bab4567..e2ad51b 100644
--- a/xfburn/xfburn-transcoder-gst.c
+++ b/xfburn/xfburn-transcoder-gst.c
@@ -41,6 +41,7 @@
 
 #include <gst/gst.h>
 #include <gst/pbutils/missing-plugins.h>
+#include <gst/pbutils/pbutils.h>
 
 #include "xfburn-global.h"
 #include "xfburn-error.h"
@@ -119,6 +120,8 @@ typedef struct {
   gboolean is_audio;
   gint64 duration;
 
+  GstDiscoverer *discoverer;
+
   GError *error;
 
   GSList *tracks;
@@ -220,6 +223,8 @@ xfburn_transcoder_gst_init (XfburnTranscoderGst * obj)
    * information from gst */
   g_mutex_init (&priv->gst_mutex);
   g_mutex_lock (&priv->gst_mutex);
+
+  priv->discoverer = gst_discoverer_new(GST_SECOND, NULL);
 }
 
 static void
@@ -230,6 +235,7 @@ xfburn_transcoder_gst_finalize (GObject * object)
   gst_element_set_state (priv->pipeline, GST_STATE_NULL);
 
   gst_object_unref (GST_OBJECT (priv->pipeline));
+  gst_object_unref (GST_OBJECT (priv->discoverer));
   priv->pipeline = NULL;
 
   G_OBJECT_CLASS (parent_class)->finalize (object);
@@ -766,8 +772,10 @@ get_audio_track (XfburnTranscoder *trans, XfburnAudioTrack *atrack, GError **err
   XfburnTranscoderGstPrivate *priv= XFBURN_TRANSCODER_GST_GET_PRIVATE (tgst);
 
   XfburnAudioTrackGst *gtrack;
-  gint64 end_time;
   off_t size;
+  GstDiscovererInfo *info;
+  GstDiscovererResult result;
+  gchar *uri;
 
   priv->is_audio = FALSE;
 #if DEBUG_GST > 0
@@ -775,38 +783,27 @@ get_audio_track (XfburnTranscoder *trans, XfburnAudioTrack *atrack, GError **err
 #endif
 
   priv->state = XFBURN_TRANSCODER_GST_STATE_IDENTIFYING;
-  g_object_set (G_OBJECT (priv->source), "location", atrack->inputfile, NULL);
-  if (gst_element_set_state (priv->pipeline, GST_STATE_PAUSED) == GST_STATE_CHANGE_FAILURE) {
-#if DEBUG_GST > 0
-    g_message ("Supposedly failed to change gstreamer state, ignoring it as usually it does it anyways.");
-#endif
-  }
 
-  end_time = g_get_monotonic_time () + SIGNAL_WAIT_TIMEOUT_MS * G_TIME_SPAN_MILLISECOND;
-#if DEBUG_GST > 0
-  DBG ("Now waiting for identification result");
-#endif
-  while (!priv->gst_done)
-    if (!g_cond_wait_until (&priv->gst_cond, &priv->gst_mutex, end_time)) {
-      DBG ("gst identification timed out");
-      recreate_pipeline (tgst);
-      g_set_error (error, XFBURN_ERROR, XFBURN_ERROR_GST_TIMEOUT,
-                   _("Gstreamer did not like this file (detection timed out)"));
+  uri = g_strdup_printf("file://%s", atrack->inputfile);
+  info = gst_discoverer_discover_uri(priv->discoverer, uri, error);
+  g_free(uri);
+
+  if (*error != NULL) {
       return FALSE;
-    }
-  priv->gst_done = FALSE;
-#if DEBUG_GST > 0
-  DBG ("Got an identification result ");
-#endif
+  }
 
-  if (!priv->is_audio) {
-    g_set_error (error, XFBURN_ERROR, XFBURN_ERROR_NOT_AUDIO_FORMAT,
-                 _("%s\n\nis not an audio file:\n\n%s"), atrack->inputfile, priv->error->message);
-    g_error_free (priv->error);
-    priv->error = NULL;
+  if ((result = gst_discoverer_info_get_result(info)) != GST_DISCOVERER_OK) {
+    gst_discoverer_info_unref(info);
+    DBG ("gst discoverer said %d", result);
+    /* TODO: improve error messages */
+    //recreate_pipeline (tgst);
+    g_set_error (error, XFBURN_ERROR, XFBURN_ERROR_GST_DISCOVERER,
+                _("Could not identify '%s'with gstreamer"), atrack->inputfile);
     return FALSE;
   }
+  priv->gst_done = FALSE;
 
+  priv->duration = gst_discoverer_info_get_duration(info);
   atrack->length = priv->duration / 1000000000;
 
   size = (off_t) floorf (priv->duration * (PCM_BYTES_PER_SECS / (float) 1000000000));
@@ -821,6 +818,8 @@ get_audio_track (XfburnTranscoder *trans, XfburnAudioTrack *atrack, GError **err
 
   gtrack->size = size;
 
+  gst_discoverer_info_unref(info);
+
   return TRUE;
 }