basesrc: Only force-update the duration for dynamic sources when doing the DURATION...

Doing it after every single create() is not very efficient and not necessary.
Especially on network file systems fstat() is not cached and causes network
traffic, making the source possibly unusable slow.

https://bugzilla.gnome.org/show_bug.cgi?id=652037

diff --git a/libs/gst/base/gstbasesrc.c b/libs/gst/base/gstbasesrc.c
index 984542d..db7c895 100644 (file)
--- a/libs/gst/base/gstbasesrc.c
+++ b/libs/gst/base/gstbasesrc.c
@@ -346,7 +346,7 @@ static GstFlowReturn gst_base_src_get_range (GstBaseSrc * src, guint64 offset,
 static gboolean gst_base_src_seekable (GstBaseSrc * src);
 static gboolean gst_base_src_negotiate (GstBaseSrc * basesrc);
 static gboolean gst_base_src_update_length (GstBaseSrc * src, guint64 offset,
-    guint * length);
+    guint * length, gboolean force);
 
 static void
 gst_base_src_class_init (GstBaseSrcClass * klass)
@@ -1018,8 +1018,8 @@ gst_base_src_default_query (GstBaseSrc * src, GstQuery * query)
           guint length = 0;
 
           /* may have to refresh duration */
-          if (g_atomic_int_get (&src->priv->dynamic_size))
-            gst_base_src_update_length (src, 0, &length);
+          gst_base_src_update_length (src, 0, &length,
+              g_atomic_int_get (&src->priv->dynamic_size));
 
           /* this is the duration as configured by the subclass. */
           GST_OBJECT_LOCK (src);
@@ -2221,13 +2221,13 @@ no_sync:
 
 /* Called with STREAM_LOCK and LIVE_LOCK */
 static gboolean
-gst_base_src_update_length (GstBaseSrc * src, guint64 offset, guint * length)
+gst_base_src_update_length (GstBaseSrc * src, guint64 offset, guint * length,
+    gboolean force)
 {
   guint64 size, maxsize;
   GstBaseSrcClass *bclass;
   GstFormat format;
   gint64 stop;
-  gboolean dynamic;
 
   bclass = GST_BASE_SRC_GET_CLASS (src);
 
@@ -2252,14 +2252,11 @@ gst_base_src_update_length (GstBaseSrc * src, guint64 offset, guint * length)
       ", segment.stop %" G_GINT64_FORMAT ", maxsize %" G_GINT64_FORMAT, offset,
       *length, size, stop, maxsize);
 
-  dynamic = g_atomic_int_get (&src->priv->dynamic_size);
-  GST_DEBUG_OBJECT (src, "dynamic size: %d", dynamic);
-
   /* check size if we have one */
   if (maxsize != -1) {
     /* if we run past the end, check if the file became bigger and
      * retry. */
-    if (G_UNLIKELY (offset + *length >= maxsize || dynamic)) {
+    if (G_UNLIKELY (offset + *length >= maxsize || force)) {
       /* see if length of the file changed */
       if (bclass->get_size)
         if (!bclass->get_size (src, &size))
@@ -2327,7 +2324,7 @@ again:
   if (G_UNLIKELY (!bclass->create))
     goto no_function;
 
-  if (G_UNLIKELY (!gst_base_src_update_length (src, offset, &length)))
+  if (G_UNLIKELY (!gst_base_src_update_length (src, offset, &length, FALSE)))
     goto unexpected_length;
 
   /* track position */