docs/design/part-buffering.txt: Fix some typos and set the estimated total for push mode to -1.

Original commit message from CVS:
* docs/design/part-buffering.txt:
Fix some typos and set the estimated total for push mode to -1.
* gst/gstquery.c: (gst_query_new_buffering):
Set buffering-left to 0 as we're not buffering by default.
* libs/gst/base/gstbasesrc.c: (gst_base_src_default_query):
Implement BUFFERING query.

ChangeLog

@@ -1,3 +1,14 @@
+2008-04-09  Wim Taymans  <wim.taymans@collabora.co.uk>
+
+	* docs/design/part-buffering.txt:
+	Fix some typos and set the estimated total for push mode to -1.
+
+	* gst/gstquery.c: (gst_query_new_buffering):
+	Set buffering-left to 0 as we're not buffering by default.
+
+	* libs/gst/base/gstbasesrc.c: (gst_base_src_default_query):
+	Implement BUFFERING query.
+
 2008-04-09  Tim-Philipp Müller  <tim at centricular dot net>
 
 	Based on patch by: Milosz Derezynski <internalerror gmail com>

docs/design/part-buffering.txt

@@ -236,7 +236,7 @@ A GstBaseSrc with random access replies to the BUFFERING query with:
   "format" = GST_FORMAT_BYTES
   "start" = 0
   "stop" = the total filesize
-  "estimated-time" = 0
+  "estimated-total" = 0
 
 A GstBaseSrc in push mode replies to the BUFFERING query with:
 
@@ -248,5 +248,5 @@ A GstBaseSrc in push mode replies to the BUFFERING query with:
   "format" = a valid GST_TYPE_FORMAT
   "start" = current position
   "stop" = current position
-  "estimated-time" = 0
+  "estimated-total" = -1
 

gst/gstquery.c

@@ -1126,7 +1126,7 @@ gst_query_new_buffering (GstFormat format)
       GST_QUARK (BUFFERING_MODE), GST_TYPE_BUFFERING_MODE, GST_BUFFERING_STREAM,
       GST_QUARK (AVG_IN_RATE), G_TYPE_INT, -1,
       GST_QUARK (AVG_OUT_RATE), G_TYPE_INT, -1,
-      GST_QUARK (BUFFERING_LEFT), G_TYPE_INT64, -1,
+      GST_QUARK (BUFFERING_LEFT), G_TYPE_INT64, 0,
       GST_QUARK (ESTIMATED_TOTAL), G_TYPE_INT64, -1,
       GST_QUARK (FORMAT), GST_TYPE_FORMAT, format,
       GST_QUARK (START_VALUE), G_TYPE_INT64, (gint64) - 1,

libs/gst/base/gstbasesrc.c

@@ -756,6 +756,7 @@ gst_base_src_default_query (GstBaseSrc * src, GstQuery * query)
 
       GST_DEBUG_OBJECT (src, "duration query in format %s",
           gst_format_get_name (format));
+
       switch (format) {
         case GST_FORMAT_PERCENT:
           gst_query_set_duration (query, GST_FORMAT_PERCENT,
@@ -858,6 +859,47 @@ gst_base_src_default_query (GstBaseSrc * src, GstQuery * query)
     }
     case GST_QUERY_JITTER:
     case GST_QUERY_RATE:
+      res = FALSE;
+      break;
+    case GST_QUERY_BUFFERING:
+    {
+      res = FALSE;
+      GstFormat format;
+      gint64 start, stop, estimated;
+
+      gst_query_parse_buffering_range (query, &format, NULL, NULL, NULL);
+
+      GST_DEBUG_OBJECT (src, "buffering query in format %s",
+          gst_format_get_name (format));
+
+      if (src->random_access) {
+        estimated = 0;
+        start = 0;
+        if (format == GST_FORMAT_PERCENT)
+          stop = GST_FORMAT_PERCENT_MAX;
+        else
+          stop = src->segment.duration;
+      } else {
+        estimated = -1;
+        start = -1;
+        stop = -1;
+      }
+      /* convert to required format. When the conversion fails, we can't answer
+       * the query. When the value is unknown, we can don't perform conversion
+       * but report TRUE. */
+      if (format != GST_FORMAT_PERCENT && stop != -1) {
+        res = gst_pad_query_convert (src->srcpad, src->segment.format,
+            stop, &format, &stop);
+      } else {
+        res = TRUE;
+      }
+      if (res && format != GST_FORMAT_PERCENT && start != -1)
+        res = gst_pad_query_convert (src->srcpad, src->segment.format,
+            start, &format, &start);
+
+      gst_query_set_buffering_range (query, format, start, stop, estimated);
+      break;
+    }
     default:
       res = FALSE;
       break;