bufferlist: add function to add a list of buffers

Add a function to add a list of buffers to the bufferlist.

gst/gstbufferlist.c

@@ -526,6 +526,52 @@ gst_buffer_list_iterator_add (GstBufferListIterator * it, GstBuffer * buffer)
       buffer);
 }
 
+/**
+ * gst_buffer_list_iterator_add_list:
+ * @it: a #GstBufferListIterator
+ * @list: a #GList
+ *
+ * Inserts @list of buffers into the #GstBufferList iterated with @it. The list is
+ * inserted into the current group, immediately before the buffer that would be
+ * returned by gst_buffer_list_iterator_next(). The list is inserted before
+ * the implicit cursor, a subsequent call to gst_buffer_list_iterator_next()
+ * will return the buffer after the last buffer of the inserted list, if any.
+ *
+ * This function takes ownership of @list and all its buffers.
+ *
+ * Since: 0.10.31
+ */
+void
+gst_buffer_list_iterator_add_list (GstBufferListIterator * it, GList * list)
+{
+  GList *last;
+
+  g_return_if_fail (it != NULL);
+  g_return_if_fail (it->next != it->list->buffers);
+
+  if (list == NULL)
+    return;
+
+  if (it->next) {
+    last = list;
+    while (last->next)
+      last = last->next;
+
+    last->next = it->next;
+    list->prev = it->next->prev;
+    it->next->prev = last;
+    if (list->prev)
+      list->prev->next = list;
+  } else {
+    last = it->list->buffers;
+    while (last->next)
+      last = last->next;
+
+    last->next = list;
+    list->prev = last;
+  }
+}
+
 /**
  * gst_buffer_list_iterator_add_group:
  * @it: a #GstBufferListIterator

gst/gstbufferlist.h

@@ -220,6 +220,7 @@ GstBuffer *              gst_buffer_list_iterator_next         (GstBufferListIte
 gboolean                 gst_buffer_list_iterator_next_group   (GstBufferListIterator *it);
 
 void                     gst_buffer_list_iterator_add          (GstBufferListIterator *it, GstBuffer *buffer);
+void                     gst_buffer_list_iterator_add_list     (GstBufferListIterator *it, GList *list);
 void                     gst_buffer_list_iterator_add_group    (GstBufferListIterator *it);
 void                     gst_buffer_list_iterator_remove       (GstBufferListIterator *it);
 GstBuffer *              gst_buffer_list_iterator_steal        (GstBufferListIterator *it);

tests/check/gst/gstbufferlist.c

@@ -766,6 +766,36 @@ GST_START_TEST (test_foreach)
 
 GST_END_TEST;
 
+GST_START_TEST (test_list)
+{
+  GstBufferListIterator *it;
+  GList *l = NULL;
+  gint i;
+
+  for (i = 0; i < 10; i++) {
+    gchar name[10];
+    g_snprintf (name, 10, "%d", i);
+    l = g_list_append (l, buffer_from_string (name));
+  }
+
+  /* add buffers to the list */
+  it = gst_buffer_list_iterate (list);
+  gst_buffer_list_iterator_add_group (it);
+  gst_buffer_list_iterator_add_list (it, l);
+
+  for (i = 0; i < 10; i++) {
+    GstBuffer *buf;
+    gchar name[10];
+
+    buf = gst_buffer_list_get (list, 0, i);
+    g_snprintf (name, 10, "%d", i);
+    fail_unless (memcmp (name, (gchar *) GST_BUFFER_DATA (buf),
+            GST_BUFFER_SIZE (buf)) == 0);
+  }
+  gst_buffer_list_iterator_free (it);
+}
+
+GST_END_TEST;
 
 static Suite *
 gst_buffer_list_suite (void)
@@ -783,6 +813,7 @@ gst_buffer_list_suite (void)
   tcase_add_test (tc_chain, test_do);
   tcase_add_test (tc_chain, test_merge);
   tcase_add_test (tc_chain, test_foreach);
+  tcase_add_test (tc_chain, test_list);
 
   return s;
 }

win32/common/libgstreamer.def

@@ -98,6 +98,7 @@ EXPORTS
 	gst_buffer_list_iterate
 	gst_buffer_list_iterator_add
 	gst_buffer_list_iterator_add_group
+	gst_buffer_list_iterator_add_list
 	gst_buffer_list_iterator_do
 	gst_buffer_list_iterator_free
 	gst_buffer_list_iterator_merge_group