implement translatable error messages using gerror.

Original commit message from CVS:
implement translatable error messages using gerror.

Includes bugfixes for:
- crash when unlinking Ghostpads
- make *_PAD_* macros use glib casts
- make spider typefinding merge buffers correctly

gst/autoplug/gstspideridentity.c

@@ -23,6 +23,7 @@
 #ifdef HAVE_CONFIG_H
 #  include "config.h"
 #endif
+#include "gst/gst_private.h"
 
 #include "gstspideridentity.h"
 #include "gstspider.h"
@@ -413,14 +414,14 @@ gst_spider_identity_src_loop (GstSpiderIdentity *ident)
 static void
 gst_spider_identity_sink_loop_type_finding (GstSpiderIdentity *ident)
 {
-  GstBuffer *buf=NULL;
+  GstBuffer *buf = NULL;
   GstBuffer *typefindbuf = NULL;
   gboolean getmorebuf = TRUE;
   GList *type_list;
   GstCaps *caps;
 
   /* this should possibly be a property */
-  guint bufsizelimit = 4096;
+  guint bufsizelimit = 40960;
   
   g_return_if_fail (GST_IS_SPIDER_IDENTITY (ident));
 
@@ -434,7 +435,7 @@ gst_spider_identity_sink_loop_type_finding (GstSpiderIdentity *ident)
     buf = gst_pad_pull (ident->sink);
   
     /* if it's an event... */
-    while (GST_IS_EVENT (buf)) {
+    if (GST_IS_EVENT (buf)) {
       switch (GST_EVENT_TYPE (GST_EVENT (buf))){
       case GST_EVENT_EOS:
         getmorebuf = FALSE;
@@ -449,25 +450,20 @@ gst_spider_identity_sink_loop_type_finding (GstSpiderIdentity *ident)
       /* handle DISCONT events, please */
     }
 
-    typefindbuf = buf;
-    getmorebuf = FALSE;
-    /* FIXME merging doesn't work for some reason so 
-     * we'll just typefind with the first element
     if (!typefindbuf){
       typefindbuf = buf;
-      gst_buffer_ref(buf);
+    } else {
-    }
-    else {
       GstBuffer *oldbuf = typefindbuf;
       typefindbuf = gst_buffer_merge(typefindbuf, buf);
       gst_buffer_unref(oldbuf);
       gst_buffer_unref(buf);
     }
-    */
   }
   
   if (!typefindbuf){
-    goto end;
+    return;
+  } else {
+    buf = typefindbuf;
   }
 
   /* maybe there are already valid caps now? */
@@ -500,7 +496,10 @@ gst_spider_identity_sink_loop_type_finding (GstSpiderIdentity *ident)
     }
     type_list = g_list_next (type_list);
   }
-  gst_element_error(GST_ELEMENT(ident), "Could not find media type", NULL);
+  gst_element_error(GST_ELEMENT(ident), GST_ERROR_INVALID_DATA,
+		    g_strdup (_("Could not find data type")),
+		    g_strdup_printf ("spider element %s couldn't typefind the data stream", 
+				     GST_ELEMENT_NAME (ident)));
   gst_buffer_unref(buf);
   buf = GST_BUFFER (gst_event_new (GST_EVENT_EOS));
 

gst/elements/gstfakesink.c

@@ -24,6 +24,7 @@
 #ifdef HAVE_CONFIG_H
 #  include "config.h"
 #endif
+#include "gst/gst_private.h"
 
 #include "gstfakesink.h"
 
@@ -406,7 +407,9 @@ gst_fakesink_change_state (GstElement *element)
   return GST_STATE_SUCCESS;
 
 error:
-  gst_element_error (element, "failed state change as requested");
+  gst_element_gerror (element, GST_ERROR_NO_ERROR,
+		      g_strdup (_("user selected error")),
+		      g_strdup ("failed state change as requested"));
   return GST_STATE_FAILURE;
 }
 

gst/elements/gstfilesink.c

@@ -24,6 +24,7 @@
 #ifdef HAVE_CONFIG_H
 #  include "config.h"
 #endif
+#include "gst/gst_private.h"
 
 #include <gst/gst.h>
 #include <errno.h>
@@ -222,9 +223,9 @@ gst_filesink_open_file (GstFileSink *sink)
 
   sink->file = fopen (sink->filename, "w");
   if (sink->file == NULL) {
-    gst_element_error (GST_ELEMENT (sink),
+    gst_element_gerror (GST_ELEMENT (sink), GST_ERROR_DEVICE,
-		       "Error opening file %s: %s",
+			g_strdup_printf (_("Could not open file \"%s\""), sink->filename),
-		       sink->filename, g_strerror(errno));
+			g_strdup_printf ("Error opening file \"%s\": %s", sink->filename, g_strerror(errno)));
     return FALSE;
   } 
 
@@ -242,9 +243,9 @@ gst_filesink_close_file (GstFileSink *sink)
 
   if (fclose (sink->file) != 0)
   {
-    gst_element_error (GST_ELEMENT (sink),
+    gst_element_gerror (GST_ELEMENT (sink), GST_ERROR_DEVICE,
-		       "Error closing file %s: %s",
+			g_strdup_printf (_("Could not open file \"%s\""), sink->filename),
-		       sink->filename, g_strerror(errno));
+			g_strdup_printf ("Error closing file \"%s\": %s", sink->filename, g_strerror(errno)));
   }
   else {
     GST_FLAG_UNSET (sink, GST_FILESINK_OPEN);
@@ -340,9 +341,10 @@ gst_filesink_handle_event (GstPad *pad, GstEvent *event)
 
       if (GST_EVENT_SEEK_FLAGS (event) & GST_SEEK_FLAG_FLUSH)
         if (fflush (filesink->file))
-          gst_element_error (GST_ELEMENT (filesink),
+          gst_element_gerror (GST_ELEMENT (filesink), GST_ERROR_DEVICE,
-			     "Error flushing file %s: %s",
+			      g_strdup_printf (_("Could not write to file \"%s\""), filesink->filename),
-			     filesink->filename, g_strerror(errno));
+			      g_strdup_printf ("Error flushing file \"%s\": %s",
+					       filesink->filename, g_strerror(errno)));
 
       switch (GST_EVENT_SEEK_METHOD(event))
       {
@@ -372,9 +374,10 @@ gst_filesink_handle_event (GstPad *pad, GstEvent *event)
     }
     case GST_EVENT_FLUSH:
       if (fflush (filesink->file)) {
-        gst_element_error (GST_ELEMENT (filesink),
+        gst_element_gerror (GST_ELEMENT (filesink), GST_ERROR_DEVICE,
-			   "Error flushing file %s: %s",
+			    g_strdup_printf (_("Could not write to file \"%s\""), filesink->filename),
-			   filesink->filename, g_strerror(errno));
+			    g_strdup_printf ("Error flushing file \"%s\": %s",
+					     filesink->filename, g_strerror(errno)));
       }
       break;
     case GST_EVENT_EOS:
@@ -423,10 +426,10 @@ gst_filesink_chain (GstPad *pad, GstBuffer *buf)
 			     GST_BUFFER_SIZE (buf) - bytes_written,
 			     filesink->file);
       if (wrote <= 0) {
-	gst_element_error (GST_ELEMENT (filesink),
+	gst_element_gerror (GST_ELEMENT (filesink), GST_ERROR_DEVICE,
-			   "Only %d of %d bytes written: %s",
+			    g_strdup_printf (_("Could not write to file \"%s\""), filesink->filename),
-			   bytes_written, GST_BUFFER_SIZE (buf),
+			    g_strdup_printf ("Only %d of %d bytes written: %s", bytes_written,
-			   strerror (errno));
+			    GST_BUFFER_SIZE (buf), strerror (errno)));
 	break;
       }
       bytes_written += wrote;

gst/elements/gstfilesrc.c

@@ -23,6 +23,7 @@
 #ifdef HAVE_CONFIG_H
 #  include "config.h"
 #endif
+#include "gst/gst_private.h"
 
 #include <gst/gst.h>
 #include "gstfilesrc.h"
@@ -398,7 +399,9 @@ gst_filesrc_map_region (GstFileSrc *src, off_t offset, size_t size)
   mmapregion = mmap (NULL, size, PROT_READ, MAP_SHARED, src->fd, offset);
 
   if (mmapregion == NULL) {
-    gst_element_error (GST_ELEMENT (src), "couldn't map file");
+    gst_element_gerror (GST_ELEMENT (src), GST_ERROR_DEVICE,
+			g_strdup_printf (_("could not open file %s"), src->filename),
+			g_strdup_printf ("couldn't map file %s", src->filename));
     return NULL;
   }
   else if (mmapregion == MAP_FAILED) {
@@ -635,13 +638,11 @@ gst_filesrc_get_read (GstFileSrc *src)
   g_return_val_if_fail (buf != NULL, NULL);
 
   ret = read (src->fd, GST_BUFFER_DATA (buf), readsize);
+  GST_BUFFER_SIZE (buf) = ret;
   if (ret < 0){
-    gst_element_error (GST_ELEMENT (src), "reading file (%s)",
+    gst_element_gerror (GST_ELEMENT (src), GST_ERROR_DEVICE,
-        strerror (errno), NULL);
+		       g_strdup_printf (_("Could not read file \"%s\""), src->filename),
-    return NULL;
+		       g_strdup_printf ("Error during file reading: %s", strerror (errno)));
-  }
-  if (ret < readsize) {
-    gst_element_error (GST_ELEMENT (src), "unexpected end of file", NULL);
     return NULL;
   }
 
@@ -702,8 +703,9 @@ gst_filesrc_open_file (GstFileSrc *src)
   /* open the file */
   src->fd = open (src->filename, O_RDONLY);
   if (src->fd < 0) {
-    gst_element_error (GST_ELEMENT (src), "opening file \"%s\" (%s)", 
+    gst_element_gerror (GST_ELEMENT (src), GST_ERROR_DEVICE,
-    		       src->filename, strerror (errno), NULL);
+		        g_strdup_printf (_("Could not open file \"%s\""), src->filename),
+		        g_strdup_printf ("Error opening file \"%s\": %s", src->filename, strerror (errno)));
     return FALSE;
   } else {
     /* check if it is a regular file, otherwise bail out */
@@ -712,8 +714,10 @@ gst_filesrc_open_file (GstFileSrc *src)
     fstat(src->fd, &stat_results);
 
     if (!S_ISREG(stat_results.st_mode)) {
-      gst_element_error (GST_ELEMENT (src), "opening file \"%s\" failed. it isn't a regular file", 
+      gst_element_gerror (GST_ELEMENT (src), GST_ERROR_DEVICE,
-      					src->filename, NULL);
+			  g_strdup_printf (_("Could not open file \"%s\""), src->filename),
+			  g_strdup_printf ("opening file \"%s\" failed. it isn't a regular file", 
+					   src->filename));
       close(src->fd);
       return FALSE;
     }

gst/elements/gstidentity.c

@@ -26,6 +26,7 @@
 #ifdef HAVE_CONFIG_H
 #  include "config.h"
 #endif
+#include "gst/gst_private.h"
 
 #include "gstidentity.h"
 
@@ -249,7 +250,9 @@ gst_identity_chain (GstPad *pad, GstBuffer *buf)
     identity->error_after--;
     if (identity->error_after == 0) {
       gst_buffer_unref (buf);
-      gst_element_error (GST_ELEMENT (identity), "errored after iterations as requested");
+      gst_element_error (GST_ELEMENT (identity), GST_ERROR_NO_ERROR,
+			 g_strdup (_("user selected error")),
+			 g_strdup ("errored after iterations as requested"));
       return;
     }
   }

gst/elements/gstmultidisksrc.c

@@ -26,10 +26,12 @@
 #include <fcntl.h>
 #include <unistd.h>
 #include <sys/mman.h>
+#include <errno.h>
 
 #ifdef HAVE_CONFIG_H
 #  include "config.h"
 #endif
+#include "gst/gst_private.h"
 
 #include "gstmultidisksrc.h"
 
@@ -253,7 +255,9 @@ gboolean gst_multidisksrc_open_file (GstMultiDiskSrc *src, GstPad *srcpad)
 
   if (src->fd < 0) {
     perror ("open");
-    gst_element_error (GST_ELEMENT (src), g_strconcat("opening file \"", src->currentfilename, "\"", NULL));
+    gst_element_gerror (GST_ELEMENT (src), GST_ERROR_DEVICE,
+		       g_strdup_printf (_("Could not open file \"%s\""), src->currentfilename),
+		       g_strdup_printf ("error opening file \"%s\": %s", src->currentfilename, strerror (errno)));
     return FALSE;
   } else {
     /* find the file length */
@@ -261,13 +265,16 @@ gboolean gst_multidisksrc_open_file (GstMultiDiskSrc *src, GstPad *srcpad)
     lseek (src->fd, 0, SEEK_SET);
     /* map the file into memory */
     src->map = mmap (NULL, src->size, PROT_READ, MAP_SHARED, src->fd, 0);
-    madvise (src->map,src->size, 2);
     /* collapse state if that failed */
     if (src->map == NULL) {
       close (src->fd);
-      gst_element_error (GST_ELEMENT (src),"mmapping file");
+      gst_element_gerror (GST_ELEMENT (src), GST_ERROR_DEVICE,
+			  g_strdup_printf (_("Could not open file \"%s\""), src->currentfilename),
+			  g_strdup_printf ("error mmapping file \"%s\": %s", 
+					   src->currentfilename, strerror (errno)));
       return FALSE;
     }
+    madvise (src->map, src->size, 2);
     GST_FLAG_SET (src, GST_MULTIDISKSRC_OPEN);
     src->new_seek = TRUE;
   }

gst/elements/gstmultifilesrc.c

@@ -26,10 +26,12 @@
 #include <fcntl.h>
 #include <unistd.h>
 #include <sys/mman.h>
+#include <errno.h>
 
 #ifdef HAVE_CONFIG_H
 #  include "config.h"
 #endif
+#include "gst/gst_private.h"
 
 #include "gstmultidisksrc.h"
 
@@ -253,7 +255,9 @@ gboolean gst_multidisksrc_open_file (GstMultiDiskSrc *src, GstPad *srcpad)
 
   if (src->fd < 0) {
     perror ("open");
-    gst_element_error (GST_ELEMENT (src), g_strconcat("opening file \"", src->currentfilename, "\"", NULL));
+    gst_element_gerror (GST_ELEMENT (src), GST_ERROR_DEVICE,
+		       g_strdup_printf (_("Could not open file \"%s\""), src->currentfilename),
+		       g_strdup_printf ("error opening file \"%s\": %s", src->currentfilename, strerror (errno)));
     return FALSE;
   } else {
     /* find the file length */
@@ -261,13 +265,16 @@ gboolean gst_multidisksrc_open_file (GstMultiDiskSrc *src, GstPad *srcpad)
     lseek (src->fd, 0, SEEK_SET);
     /* map the file into memory */
     src->map = mmap (NULL, src->size, PROT_READ, MAP_SHARED, src->fd, 0);
-    madvise (src->map,src->size, 2);
     /* collapse state if that failed */
     if (src->map == NULL) {
       close (src->fd);
-      gst_element_error (GST_ELEMENT (src),"mmapping file");
+      gst_element_gerror (GST_ELEMENT (src), GST_ERROR_DEVICE,
+			  g_strdup_printf (_("Could not open file \"%s\""), src->currentfilename),
+			  g_strdup_printf ("error mmapping file \"%s\": %s", 
+					   src->currentfilename, strerror (errno)));
       return FALSE;
     }
+    madvise (src->map, src->size, 2);
     GST_FLAG_SET (src, GST_MULTIDISKSRC_OPEN);
     src->new_seek = TRUE;
   }

gst/elements/gstpipefilter.c

@@ -32,6 +32,7 @@
 #ifdef HAVE_CONFIG_H
 #  include "config.h"
 #endif
+#include "gst/gst_private.h"
 
 #include "gstpipefilter.h"
 
@@ -148,9 +149,9 @@ gst_pipefilter_handle_event (GstPad *pad, GstEvent *event)
 
   GST_DEBUG ("pipefilter: %s received event", GST_ELEMENT_NAME (pipefilter));
   if (close (pipefilter->fdin[1]) < 0)
-    perror("close");
+    GST_DEBUG ("close");
   if (close (pipefilter->fdout[0]) < 0)
-    perror("close");
+    GST_DEBUG ("close");
 
   return TRUE;
 }
@@ -178,8 +179,9 @@ gst_pipefilter_get (GstPad *pad)
   readbytes = read(pipefilter->fdout[0], GST_BUFFER_DATA(newbuf), pipefilter->bytes_per_read);
   GST_DEBUG ("read %ld bytes", readbytes);
   if (readbytes < 0) {
-    perror("read");
+    gst_element_gerror (GST_ELEMENT(pipefilter), GST_ERROR_DEVICE,
-    gst_element_error(GST_ELEMENT(pipefilter),"reading");
+			g_strdup (_("Could not process data")),
+			g_strdup_printf ("Error reading from pipe: %s", strerror (errno)));
     return NULL;
   }
   /* if we didn't get as many bytes as we asked for, we're at EOF */
@@ -216,8 +218,7 @@ gst_pipefilter_chain (GstPad *pad,GstBuffer *buf)
   writebytes = write(pipefilter->fdin[1],data,size);
   GST_DEBUG ("written %ld bytes", writebytes);
   if (writebytes < 0) {
-    perror("write");
+    gst_element_gerror (GST_ELEMENT(pipefilter), GST_ERROR_DEVICE, g_strdup (""), g_strdup ("writing"));
-    gst_element_error(GST_ELEMENT(pipefilter),"writing");
     return;
   }
   gst_buffer_unref(buf);
@@ -272,8 +273,7 @@ gst_pipefilter_open_file (GstPipefilter *src)
 
   if((src->childpid = fork()) == -1)
   {
-    perror("fork");
+    gst_element_gerror (GST_ELEMENT(src), GST_ERROR_UNKNOWN, g_strdup (""), g_strdup ("forking"));
-    gst_element_error(GST_ELEMENT(src),"forking");
     return FALSE;
   }
 
@@ -286,8 +286,7 @@ gst_pipefilter_open_file (GstPipefilter *src)
     dup2(src->fdout[1], STDOUT_FILENO);  /* set the childs output stream */
     execvp(src->command[0], &src->command[0]);
     /* will only reach if error */
-    perror("exec");
+    gst_element_gerror (GST_ELEMENT(src), GST_ERROR_UNKNOWN, g_strdup (""), g_strdup ("starting child process"));
-    gst_element_error(GST_ELEMENT(src),"starting child process");
     return FALSE;
     
   }

gst/gstelement.c

@@ -59,7 +59,7 @@ static void			gst_element_real_get_property	(GObject *object, guint prop_id, GVa
 static void 			gst_element_dispose 		(GObject *object);
 
 static GstElementStateReturn	gst_element_change_state	(GstElement *element);
-static void			gst_element_error_func		(GstElement* element, GstElement *source, gchar *errormsg);
+static void			gst_element_error_func		(GstElement* element, GstElement *source, GError *error, gchar *errormsg);
 
 #ifndef GST_DISABLE_LOADSAVE
 static xmlNodePtr		gst_element_save_thyself	(GstObject *object, xmlNodePtr parent);
@@ -70,6 +70,7 @@ GType _gst_element_type = 0;
 
 static GstObjectClass *parent_class = NULL;
 static guint gst_element_signals[LAST_SIGNAL] = { 0 };
+static GQuark gst_element_error_quark;
 
 GType gst_element_get_type (void) 
 {
@@ -121,8 +122,8 @@ gst_element_class_init (GstElementClass *klass)
   gst_element_signals[ERROR] =
     g_signal_new ("error", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,
                   G_STRUCT_OFFSET (GstElementClass, error), NULL, NULL,
-                  gst_marshal_VOID__OBJECT_STRING, G_TYPE_NONE, 2,
+                  gst_marshal_VOID__OBJECT_POINTER_STRING, G_TYPE_NONE, 3,
-                  G_TYPE_OBJECT, G_TYPE_STRING);
+                  G_TYPE_OBJECT, G_TYPE_POINTER, G_TYPE_STRING);
   gst_element_signals[EOS] =
     g_signal_new ("eos", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,
                   G_STRUCT_OFFSET (GstElementClass,eos), NULL, NULL,
@@ -143,6 +144,8 @@ gst_element_class_init (GstElementClass *klass)
   klass->elementfactory 		= NULL;
   klass->padtemplates 			= NULL;
   klass->numpadtemplates 		= 0;
+
+  gst_element_error_quark = g_quark_from_static_string ("GstError");
 }
 
 static void
@@ -1788,17 +1791,17 @@ gst_element_unlink (GstElement *src, GstElement *dest)
 
 static void
 gst_element_error_func (GstElement* element, GstElement *source, 
-                        gchar *errormsg)
+                        GError *error, gchar *errormsg)
 {
   /* tell the parent */
   if (GST_OBJECT_PARENT (element)) {
-    GST_CAT_DEBUG (GST_CAT_EVENT, "forwarding error \"%s\" from %s to %s", 
+    GST_CAT_LOG (GST_CAT_EVENT, "forwarding error \"%s\" from %s to %s", 
 	       errormsg, GST_ELEMENT_NAME (element), 
 	       GST_OBJECT_NAME (GST_OBJECT_PARENT (element)));
 
     gst_object_ref (GST_OBJECT (element));
     g_signal_emit (G_OBJECT (GST_OBJECT_PARENT (element)), 
-	           gst_element_signals[ERROR], 0, source, errormsg);
+	           gst_element_signals[ERROR], 0, source, error, errormsg);
     gst_object_unref (GST_OBJECT (element));
   }
 }
@@ -2079,33 +2082,36 @@ gst_element_convert (GstElement *element,
  * It results in the "error" signal.
  */
 void
-gst_element_error (GstElement *element, const gchar *error, ...)
+gst_element_error_detailed (GstElement *element, const gchar *file, const gchar *function,
+			    gint line, GstErrorType type, 
+			    const gchar *error_message, const gchar *detailed)
 {
-  va_list var_args;
+  gchar *really_detailed;
-  gchar *string;
+  GError *error;
   
   /* checks */
   g_return_if_fail (GST_IS_ELEMENT (element));
   g_return_if_fail (error != NULL);
 
-  /* create error message */
-  va_start (var_args, error);
-  string = g_strdup_vprintf (error, var_args);
-  va_end (var_args);
-  GST_CAT_INFO (GST_CAT_EVENT, "ERROR in %s: %s", GST_ELEMENT_NAME (element), string);
-
   /* if the element was already in error, stop now */
   if (GST_FLAG_IS_SET (element, GST_ELEMENT_ERROR)) {
-    GST_CAT_INFO (GST_CAT_EVENT, "recursive ERROR detected in %s", GST_ELEMENT_NAME (element));
+    GST_CAT_INFO_OBJECT (GST_CAT_EVENT, element, "recursive ERROR detected, skipping");
-    g_free (string);
     return;
   }
-    
   GST_FLAG_SET (element, GST_ELEMENT_ERROR);
     
+  /* create detailed error message */
+  if (!function || function[0] == '\0') {
+    really_detailed = g_strdup_printf ("Error in line %d in file %s: %s", line, file, detailed);
+  } else {
+    really_detailed = g_strdup_printf ("Error in line %d in file %s: %s", line, file, detailed);
+  }
+  /* create the GError */
+  error = g_error_new_literal (gst_element_error_quark, type, error_message);
+
   /* emit the signal, make sure the element stays available */
   gst_object_ref (GST_OBJECT (element));
-  g_signal_emit (G_OBJECT (element), gst_element_signals[ERROR], 0, element, string);
+  g_signal_emit (G_OBJECT (element), gst_element_signals[ERROR], 0, element, error, really_detailed);
   
  /* tell the scheduler */
   if (element->sched) {
@@ -2125,7 +2131,7 @@ gst_element_error (GstElement *element, const gchar *error, ...)
 
   /* cleanup */
   gst_object_unref (GST_OBJECT (element));
-  g_free (string);
+  g_free (really_detailed);
 }
 
 /**

gst/gstelement.h

@@ -182,7 +182,7 @@ struct _GstElementClass {
   void (*state_change)	(GstElement *element, GstElementState old, GstElementState state);
   void (*new_pad)	(GstElement *element, GstPad *pad);
   void (*pad_removed)	(GstElement *element, GstPad *pad);
-  void (*error)		(GstElement *element, GstElement *source, gchar *error);
+  void (*error)		(GstElement *element, GstElement *source, GError *error, gchar *detailed_description);
   void (*eos)		(GstElement *element);
 
   /* local pointers for get/set */
@@ -327,7 +327,31 @@ gboolean		gst_element_convert		(GstElement *element,
 
 void			gst_element_set_eos		(GstElement *element);
 
-void 			gst_element_error 		(GstElement *element, const gchar *error, ...);
+#define gst_element_error(element,type,translated,detailed) G_STMT_START{\
+  gchar *translated_str = translated; \
+  gchar *detailed_str = detailed; \
+  GST_ERROR_OBJECT (element, detailed_str); \
+  gst_element_error_detailed (element,  __FILE__, GST_FUNCTION, __LINE__, type, translated_str, detailed_str); \
+  g_free (translated_str); \
+  g_free (detailed_str); \
+}G_STMT_END
+/* FIXME: remove the next define before releasing 0.8 */
+#if GST_VERSION_MINOR < 8
+#define gst_element_gerror gst_element_error
+#else
+#define gst_element_gerror(element,type,translated,detailed) G_STMT_START{\
+  g_warning ("gst_element_gerror should be replaced by gst_element_error"); \
+  gst_element_error (element,type,translated,detailed); \
+}G_STMT_END
+#endif
+
+void 			gst_element_error_detailed 	(GstElement *element, 
+							 const gchar *file,
+							 const gchar *function,
+							 gint line,
+							 GstErrorType type,
+							 const gchar *error_message,
+							 const gchar *detailed_error);
 
 gboolean		gst_element_is_locked_state	(GstElement *element);
 void			gst_element_set_locked_state	(GstElement *element, gboolean locked_state);

gst/gstmarshal.list

@@ -6,6 +6,7 @@ VOID:POINTER
 VOID:OBJECT
 VOID:OBJECT,PARAM
 VOID:OBJECT,POINTER
+VOID:OBJECT,POINTER,STRING
 VOID:OBJECT,STRING
 VOID:INT,INT
 VOID:INT64

gst/gstpad.c

@@ -864,11 +864,11 @@ gst_pad_unlink (GstPad *srcpad,
   g_return_if_fail ((GST_RPAD_DIRECTION (realsrc) == GST_PAD_SRC) &&
                     (GST_RPAD_DIRECTION (realsink) == GST_PAD_SINK));
 
-  if (GST_RPAD_UNLINKFUNC (srcpad)) {
+  if (GST_RPAD_UNLINKFUNC (realsrc)) {
-    GST_RPAD_UNLINKFUNC (srcpad) (srcpad);
+    GST_RPAD_UNLINKFUNC (realsrc) (GST_PAD_CAST (realsrc));
   }
-  if (GST_RPAD_UNLINKFUNC (sinkpad)) {
+  if (GST_RPAD_UNLINKFUNC (realsink)) {
-    GST_RPAD_UNLINKFUNC (sinkpad) (sinkpad);
+    GST_RPAD_UNLINKFUNC (realsink) (GST_PAD_CAST (realsink));
   }
 
   /* get the schedulers before we unlink */
@@ -2077,8 +2077,8 @@ gst_pad_recover_caps_error (GstPad *pad, GstCaps *allowed)
 
   /* report error */
   parent = gst_pad_get_parent (pad);
-  gst_element_error (parent, "negotiation failed on pad %s:%s",
+  gst_element_gerror (parent, GST_ERROR_CAPS_NEGOTIATION, g_strdup (_("Cannot decode the given data type")),
-		  GST_DEBUG_PAD_NAME (pad));
+		     g_strdup_printf ("negotiation failed on pad %s:%s", GST_DEBUG_PAD_NAME (pad)));
 
   return FALSE;
 }
@@ -2381,10 +2381,9 @@ gst_pad_pull (GstPad *pad)
   peer = GST_RPAD_PEER (pad);
 
   if (!peer) {
-    gst_element_error (GST_PAD_PARENT (pad), 
+    gst_element_gerror (GST_PAD_PARENT (pad), GST_ERROR_PIPELINE,
-		       "pull on pad %s:%s but it was unlinked", 
+		       g_strdup (_("application error: GStreamer was used wrong")),
-		       GST_ELEMENT_NAME (GST_PAD_PARENT (pad)), 
+		       g_strdup_printf ("pull on pad %s:%s but it was unlinked", GST_DEBUG_PAD_NAME (pad)));
-		       GST_PAD_NAME (pad), NULL);
   }
   else {
 restart:
@@ -2405,15 +2404,16 @@ restart:
       }
 
       /* no null buffers allowed */
-      gst_element_error (GST_PAD_PARENT (pad), 
+      gst_element_gerror (GST_PAD_PARENT (pad), GST_ERROR_PIPELINE,
-	                 "NULL buffer during pull on %s:%s", 
+			 g_strdup (_("application error: GStreamer was used wrong")),
-			 GST_DEBUG_PAD_NAME (pad));
+	                 g_strdup_printf ("NULL buffer during pull on %s:%s", GST_DEBUG_PAD_NAME (pad)));
 	  
     } else {
-      gst_element_error (GST_PAD_PARENT (pad), 
+      gst_element_gerror (GST_PAD_PARENT (pad), GST_ERROR_PIPELINE,
-		         "internal error: pull on pad %s:%s "
+			 g_strdup (_("application error: GStreamer was used wrong")),
+		         g_strdup_printf ("internal error: pull on pad %s:%s "
 			 "but the peer pad %s:%s has no gethandler", 
-		         GST_DEBUG_PAD_NAME (pad), GST_DEBUG_PAD_NAME (peer));
+		         GST_DEBUG_PAD_NAME (pad), GST_DEBUG_PAD_NAME (peer)));
     }
   }
   return GST_BUFFER (gst_event_new (GST_EVENT_INTERRUPT));

gst/gstpad.h

@@ -247,34 +247,34 @@ struct _GstGhostPadClass {
 #define GST_PAD_PAD_TEMPLATE(pad)	(((GstPad *)(pad))->padtemplate)
 
 /* GstRealPad */
-#define GST_RPAD_DIRECTION(pad)		(((GstRealPad *)(pad))->direction)
+#define GST_RPAD_DIRECTION(pad)		(GST_REAL_PAD(pad)->direction)
-#define GST_RPAD_CAPS(pad)		(((GstRealPad *)(pad))->caps)
+#define GST_RPAD_CAPS(pad)		(GST_REAL_PAD(pad)->caps)
-#define GST_RPAD_FILTER(pad)		(((GstRealPad *)(pad))->filter)
+#define GST_RPAD_FILTER(pad)		(GST_REAL_PAD(pad)->filter)
-#define GST_RPAD_APPFILTER(pad)		(((GstRealPad *)(pad))->appfilter)
+#define GST_RPAD_APPFILTER(pad)		(GST_REAL_PAD(pad)->appfilter)
-#define GST_RPAD_PEER(pad)		(((GstRealPad *)(pad))->peer)
+#define GST_RPAD_PEER(pad)		(GST_REAL_PAD(pad)->peer)
-#define GST_RPAD_CHAINFUNC(pad)		(((GstRealPad *)(pad))->chainfunc)
+#define GST_RPAD_CHAINFUNC(pad)		(GST_REAL_PAD(pad)->chainfunc)
-#define GST_RPAD_CHAINHANDLER(pad)	(((GstRealPad *)(pad))->chainhandler)
+#define GST_RPAD_CHAINHANDLER(pad)	(GST_REAL_PAD(pad)->chainhandler)
-#define GST_RPAD_GETFUNC(pad)		(((GstRealPad *)(pad))->getfunc)
+#define GST_RPAD_GETFUNC(pad)		(GST_REAL_PAD(pad)->getfunc)
-#define GST_RPAD_GETHANDLER(pad)	(((GstRealPad *)(pad))->gethandler)
+#define GST_RPAD_GETHANDLER(pad)	(GST_REAL_PAD(pad)->gethandler)
-#define GST_RPAD_EVENTFUNC(pad)		(((GstRealPad *)(pad))->eventfunc)
+#define GST_RPAD_EVENTFUNC(pad)		(GST_REAL_PAD(pad)->eventfunc)
-#define GST_RPAD_EVENTHANDLER(pad)	(((GstRealPad *)(pad))->eventhandler)
+#define GST_RPAD_EVENTHANDLER(pad)	(GST_REAL_PAD(pad)->eventhandler)
-#define GST_RPAD_CONVERTFUNC(pad)	(((GstRealPad *)(pad))->convertfunc)
+#define GST_RPAD_CONVERTFUNC(pad)	(GST_REAL_PAD(pad)->convertfunc)
-#define GST_RPAD_QUERYFUNC(pad)		(((GstRealPad *)(pad))->queryfunc)
+#define GST_RPAD_QUERYFUNC(pad)		(GST_REAL_PAD(pad)->queryfunc)
-#define GST_RPAD_INTLINKFUNC(pad)	(((GstRealPad *)(pad))->intlinkfunc)
+#define GST_RPAD_INTLINKFUNC(pad)	(GST_REAL_PAD(pad)->intlinkfunc)
-#define GST_RPAD_FORMATSFUNC(pad)	(((GstRealPad *)(pad))->formatsfunc)
+#define GST_RPAD_FORMATSFUNC(pad)	(GST_REAL_PAD(pad)->formatsfunc)
-#define GST_RPAD_QUERYTYPEFUNC(pad)	(((GstRealPad *)(pad))->querytypefunc)
+#define GST_RPAD_QUERYTYPEFUNC(pad)	(GST_REAL_PAD(pad)->querytypefunc)
-#define GST_RPAD_EVENTMASKFUNC(pad)	(((GstRealPad *)(pad))->eventmaskfunc)
+#define GST_RPAD_EVENTMASKFUNC(pad)	(GST_REAL_PAD(pad)->eventmaskfunc)
 
-#define GST_RPAD_LINKFUNC(pad)		(((GstRealPad *)(pad))->linkfunc)
+#define GST_RPAD_LINKFUNC(pad)		(GST_REAL_PAD(pad)->linkfunc)
-#define GST_RPAD_UNLINKFUNC(pad)	(((GstRealPad *)(pad))->unlinkfunc)
+#define GST_RPAD_UNLINKFUNC(pad)	(GST_REAL_PAD(pad)->unlinkfunc)
-#define GST_RPAD_GETCAPSFUNC(pad)	(((GstRealPad *)(pad))->getcapsfunc)
+#define GST_RPAD_GETCAPSFUNC(pad)	(GST_REAL_PAD(pad)->getcapsfunc)
-#define GST_RPAD_BUFFERPOOLFUNC(pad)	(((GstRealPad *)(pad))->bufferpoolfunc)
+#define GST_RPAD_BUFFERPOOLFUNC(pad)	(GST_REAL_PAD(pad)->bufferpoolfunc)
 
 /* GstGhostPad */
 #define GST_GPAD_REALPAD(pad)		(((GstGhostPad *)(pad))->realpad)
 
 /* Generic */
-#define GST_PAD_REALIZE(pad)		(GST_IS_REAL_PAD(pad) ? ((GstRealPad *)(pad)) : GST_GPAD_REALPAD(pad))
+#define GST_PAD_REALIZE(pad)		(GST_IS_REAL_PAD(pad) ? GST_REAL_PAD(pad) : GST_GPAD_REALPAD(pad))
 #define GST_PAD_DIRECTION(pad)		GST_RPAD_DIRECTION(GST_PAD_REALIZE(pad))
 #define GST_PAD_CAPS(pad)		GST_RPAD_CAPS(GST_PAD_REALIZE(pad))
 #define GST_PAD_PEER(pad)		GST_PAD_CAST(GST_RPAD_PEER(GST_PAD_REALIZE(pad)))

gst/gstqueue.c

@@ -413,7 +413,9 @@ restart:
 	if (!queue->may_deadlock) {
           g_mutex_unlock (queue->qlock);
           gst_data_unref (GST_DATA (buf));
-          gst_element_error (GST_ELEMENT (queue), "deadlock found, source pad elements are shut down");
+          gst_element_error (GST_ELEMENT (queue), GST_ERROR_UNKNOWN,
+			     g_strdup (_("Cannot go on decoding")), /* FIXME: Better ideas? */
+			     g_strdup ("deadlock found, source pad elements are shut down"));
 	  /* we don't want to goto out_unref here, since we want to clean up before calling gst_element_error */
 	  return;
 	}
@@ -493,7 +495,9 @@ restart:
       /* this means the other end is shut down */
       if (!queue->may_deadlock) {
         g_mutex_unlock (queue->qlock);
-        gst_element_error (GST_ELEMENT (queue), "deadlock found, sink pad elements are shut down");
+        gst_element_error (GST_ELEMENT (queue), GST_ERROR_UNKNOWN,
+			   g_strdup (_("Cannot go on decoding")), /* FIXME: Better ideas? */
+			   g_strdup ("deadlock found, sink pad elements are shut down"));
         goto restart;
       }
       else {

gst/gsttypefind.c

@@ -236,8 +236,9 @@ end:
   gst_buffer_unref (buf);
 
   if (typefind->max_buffers && typefind->num_buffer >= typefind->max_buffers) {
-    gst_element_error (GST_ELEMENT (typefind), 
+    gst_element_gerror (GST_ELEMENT (typefind), GST_ERROR_INVALID_DATA,
-		    "typefind could not determine type after %d buffers", typefind->num_buffer);
+	    g_strdup (_("The data cannot be identified")),
+	    g_strdup_printf ("typefind could not determine type after %d buffers", typefind->num_buffer));
   }
 }
 

gst/gsttypes.h

@@ -58,6 +58,25 @@ typedef enum {
   GST_RESULT_NOT_IMPL
 } GstResult;
 
+typedef enum {
+  /* undefined error */
+  GST_ERROR_UNDEFINED,
+  /* something that does not fit into the other categories */
+  GST_ERROR_UNKNOWN,
+  /* no error (used ie for debugging purposes) */
+  GST_ERROR_NO_ERROR,
+  /* error with device or file */
+  GST_ERROR_DEVICE,
+  /* invalid data inside the stream */
+  GST_ERROR_INVALID_DATA,
+  /* pipeline is not setup correctly */
+  GST_ERROR_PIPELINE,
+  /* no way to do caps negotiation */
+  GST_ERROR_CAPS_NEGOTIATION,
+  /* internal error - used by schedulers */
+  GST_ERROR_INTERNAL
+} GstErrorType;
+
 G_END_DECLS
 
 #endif /* __GST_TYPES_H__ */

gst/schedulers/gstbasicscheduler.c

@@ -23,6 +23,7 @@
 #ifdef HAVE_CONFIG_H
 #  include "config.h"
 #endif
+#include "gst/gst_private.h"
 
 #include <gst/gst.h>
 
@@ -451,8 +452,9 @@ gst_basic_scheduler_chainhandler_proxy (GstPad * pad, GstBuffer * buf)
   }
 
   if (loop_count == 0) {
-    gst_element_error (parent, 
+    gst_element_gerror (parent, GST_ERROR_INTERNAL,
-		    "(internal error) basic: maximum number of switches exceeded");
+			g_strdup (_("Internal error in GStreamer")),
+			g_strdup ("basic scheduler error: maximum number of switches exceeded"));
     return;
   }
 
@@ -519,7 +521,9 @@ gst_basic_scheduler_gethandler_proxy (GstPad * pad)
       GST_CAT_DEBUG (debug_dataflow, "new pad in mid-switch!");
       pad = (GstPad *) GST_RPAD_PEER (peer);
       if (!pad) {
-	gst_element_error (parent, "pad unlinked");
+	gst_element_gerror (parent, GST_ERROR_PIPELINE,
+			    g_strdup (_("application error")),
+			    g_strdup_printf ("pad %s:%s is unlinked", GST_DEBUG_PAD_NAME (peer)));
       }
       parent = GST_PAD_PARENT (pad);
       peer = GST_RPAD_PEER (pad);
@@ -650,10 +654,10 @@ gst_basic_scheduler_cothreaded_chain (GstBin * bin, GstSchedulerChain * chain)
 	   * either, we have an error */
 	  if (different_sched && !peer_decoupled) 
  	  {
-            gst_element_error (element, 
+            gst_element_gerror (element, GST_ERROR_PIPELINE,
-		               "element \"%s\" is not decoupled but has pads "
+				g_strdup (_("application error")),
-			       "in different schedulers",
+				g_strdup_printf ("element \"%s\" is not decoupled but has pads "
-			       GST_ELEMENT_NAME (element), NULL);
+						 "in different schedulers", GST_ELEMENT_NAME (element)));
 	    return FALSE;
 	  }
 	  /* ok, the peer is in a different scheduler and is decoupled, 
@@ -719,8 +723,9 @@ gst_basic_scheduler_cothreaded_chain (GstBin * bin, GstSchedulerChain * chain)
 	                    chain->sched->context, 
 			    wrapper_function, 0, (char **) element);
 	if (GST_ELEMENT_THREADSTATE (element) == NULL) {
-          gst_element_error (element, "could not create cothread for \"%s\"", 
+          gst_element_gerror (element, GST_ERROR_INTERNAL,
-			  GST_ELEMENT_NAME (element), NULL);
+			      g_strdup (_("internal GStreamer error")),
+			      g_strdup_printf ("could not create cothread for \"%s\"", GST_ELEMENT_NAME (element)));
 	  return FALSE;
 	}
 	GST_DEBUG ("created cothread %p for '%s'", 

plugins/elements/gstfakesink.c

@@ -24,6 +24,7 @@
 #ifdef HAVE_CONFIG_H
 #  include "config.h"
 #endif
+#include "gst/gst_private.h"
 
 #include "gstfakesink.h"
 
@@ -406,7 +407,9 @@ gst_fakesink_change_state (GstElement *element)
   return GST_STATE_SUCCESS;
 
 error:
-  gst_element_error (element, "failed state change as requested");
+  gst_element_gerror (element, GST_ERROR_NO_ERROR,
+		      g_strdup (_("user selected error")),
+		      g_strdup ("failed state change as requested"));
   return GST_STATE_FAILURE;
 }
 

plugins/elements/gstfilesink.c

@@ -24,6 +24,7 @@
 #ifdef HAVE_CONFIG_H
 #  include "config.h"
 #endif
+#include "gst/gst_private.h"
 
 #include <gst/gst.h>
 #include <errno.h>
@@ -222,9 +223,9 @@ gst_filesink_open_file (GstFileSink *sink)
 
   sink->file = fopen (sink->filename, "w");
   if (sink->file == NULL) {
-    gst_element_error (GST_ELEMENT (sink),
+    gst_element_gerror (GST_ELEMENT (sink), GST_ERROR_DEVICE,
-		       "Error opening file %s: %s",
+			g_strdup_printf (_("Could not open file \"%s\""), sink->filename),
-		       sink->filename, g_strerror(errno));
+			g_strdup_printf ("Error opening file \"%s\": %s", sink->filename, g_strerror(errno)));
     return FALSE;
   } 
 
@@ -242,9 +243,9 @@ gst_filesink_close_file (GstFileSink *sink)
 
   if (fclose (sink->file) != 0)
   {
-    gst_element_error (GST_ELEMENT (sink),
+    gst_element_gerror (GST_ELEMENT (sink), GST_ERROR_DEVICE,
-		       "Error closing file %s: %s",
+			g_strdup_printf (_("Could not open file \"%s\""), sink->filename),
-		       sink->filename, g_strerror(errno));
+			g_strdup_printf ("Error closing file \"%s\": %s", sink->filename, g_strerror(errno)));
   }
   else {
     GST_FLAG_UNSET (sink, GST_FILESINK_OPEN);
@@ -340,9 +341,10 @@ gst_filesink_handle_event (GstPad *pad, GstEvent *event)
 
       if (GST_EVENT_SEEK_FLAGS (event) & GST_SEEK_FLAG_FLUSH)
         if (fflush (filesink->file))
-          gst_element_error (GST_ELEMENT (filesink),
+          gst_element_gerror (GST_ELEMENT (filesink), GST_ERROR_DEVICE,
-			     "Error flushing file %s: %s",
+			      g_strdup_printf (_("Could not write to file \"%s\""), filesink->filename),
-			     filesink->filename, g_strerror(errno));
+			      g_strdup_printf ("Error flushing file \"%s\": %s",
+					       filesink->filename, g_strerror(errno)));
 
       switch (GST_EVENT_SEEK_METHOD(event))
       {
@@ -372,9 +374,10 @@ gst_filesink_handle_event (GstPad *pad, GstEvent *event)
     }
     case GST_EVENT_FLUSH:
       if (fflush (filesink->file)) {
-        gst_element_error (GST_ELEMENT (filesink),
+        gst_element_gerror (GST_ELEMENT (filesink), GST_ERROR_DEVICE,
-			   "Error flushing file %s: %s",
+			    g_strdup_printf (_("Could not write to file \"%s\""), filesink->filename),
-			   filesink->filename, g_strerror(errno));
+			    g_strdup_printf ("Error flushing file \"%s\": %s",
+					     filesink->filename, g_strerror(errno)));
       }
       break;
     case GST_EVENT_EOS:
@@ -423,10 +426,10 @@ gst_filesink_chain (GstPad *pad, GstBuffer *buf)
 			     GST_BUFFER_SIZE (buf) - bytes_written,
 			     filesink->file);
       if (wrote <= 0) {
-	gst_element_error (GST_ELEMENT (filesink),
+	gst_element_gerror (GST_ELEMENT (filesink), GST_ERROR_DEVICE,
-			   "Only %d of %d bytes written: %s",
+			    g_strdup_printf (_("Could not write to file \"%s\""), filesink->filename),
-			   bytes_written, GST_BUFFER_SIZE (buf),
+			    g_strdup_printf ("Only %d of %d bytes written: %s", bytes_written,
-			   strerror (errno));
+			    GST_BUFFER_SIZE (buf), strerror (errno)));
 	break;
       }
       bytes_written += wrote;

plugins/elements/gstfilesrc.c

@@ -23,6 +23,7 @@
 #ifdef HAVE_CONFIG_H
 #  include "config.h"
 #endif
+#include "gst/gst_private.h"
 
 #include <gst/gst.h>
 #include "gstfilesrc.h"
@@ -398,7 +399,9 @@ gst_filesrc_map_region (GstFileSrc *src, off_t offset, size_t size)
   mmapregion = mmap (NULL, size, PROT_READ, MAP_SHARED, src->fd, offset);
 
   if (mmapregion == NULL) {
-    gst_element_error (GST_ELEMENT (src), "couldn't map file");
+    gst_element_gerror (GST_ELEMENT (src), GST_ERROR_DEVICE,
+			g_strdup_printf (_("could not open file %s"), src->filename),
+			g_strdup_printf ("couldn't map file %s", src->filename));
     return NULL;
   }
   else if (mmapregion == MAP_FAILED) {
@@ -635,13 +638,11 @@ gst_filesrc_get_read (GstFileSrc *src)
   g_return_val_if_fail (buf != NULL, NULL);
 
   ret = read (src->fd, GST_BUFFER_DATA (buf), readsize);
+  GST_BUFFER_SIZE (buf) = ret;
   if (ret < 0){
-    gst_element_error (GST_ELEMENT (src), "reading file (%s)",
+    gst_element_gerror (GST_ELEMENT (src), GST_ERROR_DEVICE,
-        strerror (errno), NULL);
+		       g_strdup_printf (_("Could not read file \"%s\""), src->filename),
-    return NULL;
+		       g_strdup_printf ("Error during file reading: %s", strerror (errno)));
-  }
-  if (ret < readsize) {
-    gst_element_error (GST_ELEMENT (src), "unexpected end of file", NULL);
     return NULL;
   }
 
@@ -702,8 +703,9 @@ gst_filesrc_open_file (GstFileSrc *src)
   /* open the file */
   src->fd = open (src->filename, O_RDONLY);
   if (src->fd < 0) {
-    gst_element_error (GST_ELEMENT (src), "opening file \"%s\" (%s)", 
+    gst_element_gerror (GST_ELEMENT (src), GST_ERROR_DEVICE,
-    		       src->filename, strerror (errno), NULL);
+		        g_strdup_printf (_("Could not open file \"%s\""), src->filename),
+		        g_strdup_printf ("Error opening file \"%s\": %s", src->filename, strerror (errno)));
     return FALSE;
   } else {
     /* check if it is a regular file, otherwise bail out */
@@ -712,8 +714,10 @@ gst_filesrc_open_file (GstFileSrc *src)
     fstat(src->fd, &stat_results);
 
     if (!S_ISREG(stat_results.st_mode)) {
-      gst_element_error (GST_ELEMENT (src), "opening file \"%s\" failed. it isn't a regular file", 
+      gst_element_gerror (GST_ELEMENT (src), GST_ERROR_DEVICE,
-      					src->filename, NULL);
+			  g_strdup_printf (_("Could not open file \"%s\""), src->filename),
+			  g_strdup_printf ("opening file \"%s\" failed. it isn't a regular file", 
+					   src->filename));
       close(src->fd);
       return FALSE;
     }

plugins/elements/gstidentity.c

@@ -26,6 +26,7 @@
 #ifdef HAVE_CONFIG_H
 #  include "config.h"
 #endif
+#include "gst/gst_private.h"
 
 #include "gstidentity.h"
 
@@ -249,7 +250,9 @@ gst_identity_chain (GstPad *pad, GstBuffer *buf)
     identity->error_after--;
     if (identity->error_after == 0) {
       gst_buffer_unref (buf);
-      gst_element_error (GST_ELEMENT (identity), "errored after iterations as requested");
+      gst_element_error (GST_ELEMENT (identity), GST_ERROR_NO_ERROR,
+			 g_strdup (_("user selected error")),
+			 g_strdup ("errored after iterations as requested"));
       return;
     }
   }

plugins/elements/gstmultidisksrc.c

@@ -26,10 +26,12 @@
 #include <fcntl.h>
 #include <unistd.h>
 #include <sys/mman.h>
+#include <errno.h>
 
 #ifdef HAVE_CONFIG_H
 #  include "config.h"
 #endif
+#include "gst/gst_private.h"
 
 #include "gstmultidisksrc.h"
 
@@ -253,7 +255,9 @@ gboolean gst_multidisksrc_open_file (GstMultiDiskSrc *src, GstPad *srcpad)
 
   if (src->fd < 0) {
     perror ("open");
-    gst_element_error (GST_ELEMENT (src), g_strconcat("opening file \"", src->currentfilename, "\"", NULL));
+    gst_element_gerror (GST_ELEMENT (src), GST_ERROR_DEVICE,
+		       g_strdup_printf (_("Could not open file \"%s\""), src->currentfilename),
+		       g_strdup_printf ("error opening file \"%s\": %s", src->currentfilename, strerror (errno)));
     return FALSE;
   } else {
     /* find the file length */
@@ -261,13 +265,16 @@ gboolean gst_multidisksrc_open_file (GstMultiDiskSrc *src, GstPad *srcpad)
     lseek (src->fd, 0, SEEK_SET);
     /* map the file into memory */
     src->map = mmap (NULL, src->size, PROT_READ, MAP_SHARED, src->fd, 0);
-    madvise (src->map,src->size, 2);
     /* collapse state if that failed */
     if (src->map == NULL) {
       close (src->fd);
-      gst_element_error (GST_ELEMENT (src),"mmapping file");
+      gst_element_gerror (GST_ELEMENT (src), GST_ERROR_DEVICE,
+			  g_strdup_printf (_("Could not open file \"%s\""), src->currentfilename),
+			  g_strdup_printf ("error mmapping file \"%s\": %s", 
+					   src->currentfilename, strerror (errno)));
       return FALSE;
     }
+    madvise (src->map, src->size, 2);
     GST_FLAG_SET (src, GST_MULTIDISKSRC_OPEN);
     src->new_seek = TRUE;
   }

plugins/elements/gstmultifilesrc.c

@@ -26,10 +26,12 @@
 #include <fcntl.h>
 #include <unistd.h>
 #include <sys/mman.h>
+#include <errno.h>
 
 #ifdef HAVE_CONFIG_H
 #  include "config.h"
 #endif
+#include "gst/gst_private.h"
 
 #include "gstmultidisksrc.h"
 
@@ -253,7 +255,9 @@ gboolean gst_multidisksrc_open_file (GstMultiDiskSrc *src, GstPad *srcpad)
 
   if (src->fd < 0) {
     perror ("open");
-    gst_element_error (GST_ELEMENT (src), g_strconcat("opening file \"", src->currentfilename, "\"", NULL));
+    gst_element_gerror (GST_ELEMENT (src), GST_ERROR_DEVICE,
+		       g_strdup_printf (_("Could not open file \"%s\""), src->currentfilename),
+		       g_strdup_printf ("error opening file \"%s\": %s", src->currentfilename, strerror (errno)));
     return FALSE;
   } else {
     /* find the file length */
@@ -261,13 +265,16 @@ gboolean gst_multidisksrc_open_file (GstMultiDiskSrc *src, GstPad *srcpad)
     lseek (src->fd, 0, SEEK_SET);
     /* map the file into memory */
     src->map = mmap (NULL, src->size, PROT_READ, MAP_SHARED, src->fd, 0);
-    madvise (src->map,src->size, 2);
     /* collapse state if that failed */
     if (src->map == NULL) {
       close (src->fd);
-      gst_element_error (GST_ELEMENT (src),"mmapping file");
+      gst_element_gerror (GST_ELEMENT (src), GST_ERROR_DEVICE,
+			  g_strdup_printf (_("Could not open file \"%s\""), src->currentfilename),
+			  g_strdup_printf ("error mmapping file \"%s\": %s", 
+					   src->currentfilename, strerror (errno)));
       return FALSE;
     }
+    madvise (src->map, src->size, 2);
     GST_FLAG_SET (src, GST_MULTIDISKSRC_OPEN);
     src->new_seek = TRUE;
   }

plugins/elements/gstpipefilter.c

@@ -32,6 +32,7 @@
 #ifdef HAVE_CONFIG_H
 #  include "config.h"
 #endif
+#include "gst/gst_private.h"
 
 #include "gstpipefilter.h"
 
@@ -148,9 +149,9 @@ gst_pipefilter_handle_event (GstPad *pad, GstEvent *event)
 
   GST_DEBUG ("pipefilter: %s received event", GST_ELEMENT_NAME (pipefilter));
   if (close (pipefilter->fdin[1]) < 0)
-    perror("close");
+    GST_DEBUG ("close");
   if (close (pipefilter->fdout[0]) < 0)
-    perror("close");
+    GST_DEBUG ("close");
 
   return TRUE;
 }
@@ -178,8 +179,9 @@ gst_pipefilter_get (GstPad *pad)
   readbytes = read(pipefilter->fdout[0], GST_BUFFER_DATA(newbuf), pipefilter->bytes_per_read);
   GST_DEBUG ("read %ld bytes", readbytes);
   if (readbytes < 0) {
-    perror("read");
+    gst_element_gerror (GST_ELEMENT(pipefilter), GST_ERROR_DEVICE,
-    gst_element_error(GST_ELEMENT(pipefilter),"reading");
+			g_strdup (_("Could not process data")),
+			g_strdup_printf ("Error reading from pipe: %s", strerror (errno)));
     return NULL;
   }
   /* if we didn't get as many bytes as we asked for, we're at EOF */
@@ -216,8 +218,7 @@ gst_pipefilter_chain (GstPad *pad,GstBuffer *buf)
   writebytes = write(pipefilter->fdin[1],data,size);
   GST_DEBUG ("written %ld bytes", writebytes);
   if (writebytes < 0) {
-    perror("write");
+    gst_element_gerror (GST_ELEMENT(pipefilter), GST_ERROR_DEVICE, g_strdup (""), g_strdup ("writing"));
-    gst_element_error(GST_ELEMENT(pipefilter),"writing");
     return;
   }
   gst_buffer_unref(buf);
@@ -272,8 +273,7 @@ gst_pipefilter_open_file (GstPipefilter *src)
 
   if((src->childpid = fork()) == -1)
   {
-    perror("fork");
+    gst_element_gerror (GST_ELEMENT(src), GST_ERROR_UNKNOWN, g_strdup (""), g_strdup ("forking"));
-    gst_element_error(GST_ELEMENT(src),"forking");
     return FALSE;
   }
 
@@ -286,8 +286,7 @@ gst_pipefilter_open_file (GstPipefilter *src)
     dup2(src->fdout[1], STDOUT_FILENO);  /* set the childs output stream */
     execvp(src->command[0], &src->command[0]);
     /* will only reach if error */
-    perror("exec");
+    gst_element_gerror (GST_ELEMENT(src), GST_ERROR_UNKNOWN, g_strdup (""), g_strdup ("starting child process"));
-    gst_element_error(GST_ELEMENT(src),"starting child process");
     return FALSE;
     
   }

plugins/elements/gstqueue.c

@@ -413,7 +413,9 @@ restart:
 	if (!queue->may_deadlock) {
           g_mutex_unlock (queue->qlock);
           gst_data_unref (GST_DATA (buf));
-          gst_element_error (GST_ELEMENT (queue), "deadlock found, source pad elements are shut down");
+          gst_element_error (GST_ELEMENT (queue), GST_ERROR_UNKNOWN,
+			     g_strdup (_("Cannot go on decoding")), /* FIXME: Better ideas? */
+			     g_strdup ("deadlock found, source pad elements are shut down"));
 	  /* we don't want to goto out_unref here, since we want to clean up before calling gst_element_error */
 	  return;
 	}
@@ -493,7 +495,9 @@ restart:
       /* this means the other end is shut down */
       if (!queue->may_deadlock) {
         g_mutex_unlock (queue->qlock);
-        gst_element_error (GST_ELEMENT (queue), "deadlock found, sink pad elements are shut down");
+        gst_element_error (GST_ELEMENT (queue), GST_ERROR_UNKNOWN,
+			   g_strdup (_("Cannot go on decoding")), /* FIXME: Better ideas? */
+			   g_strdup ("deadlock found, sink pad elements are shut down"));
         goto restart;
       }
       else {