bufferlist: add new api gst_buffer_list_copy_deep

https://bugzilla.gnome.org/show_bug.cgi?id=751420

docs/gst/gstreamer-sections.txt

@@ -372,6 +372,7 @@ gst_buffer_list_remove
 gst_buffer_list_ref
 gst_buffer_list_unref
 gst_buffer_list_copy
+gst_buffer_list_copy_deep
 gst_buffer_list_is_writable
 gst_buffer_list_make_writable
 

gst/gstbufferlist.c

@@ -364,3 +364,33 @@ gst_buffer_list_remove (GstBufferList * list, guint idx, guint length)
 
   gst_buffer_list_remove_range_internal (list, idx, length, TRUE);
 }
+
+/**
+ * gst_buffer_list_copy_deep:
+ * @list: a #GstBufferList
+ *
+ * Create a copy of the given buffer list. This will make a newly allocated
+ * copy of the buffer that the source buffer list contains.
+ *
+ * Returns: (transfer full): a new copy of @list.
+ *
+ * Since: 1.6
+ */
+GstBufferList *
+gst_buffer_list_copy_deep (const GstBufferList * list)
+{
+  guint i, len;
+  GstBufferList *result = NULL;
+
+  g_return_val_if_fail (GST_IS_BUFFER_LIST (list), NULL);
+
+  result = gst_buffer_list_new ();
+
+  len = list->n_buffers;
+  for (i = 0; i < len; i++) {
+    GstBuffer *old = list->buffers[i];
+    gst_buffer_list_insert (result, i, gst_buffer_copy_deep (old));
+  }
+
+  return result;
+}

gst/gstbufferlist.h

@@ -158,6 +158,7 @@ void                     gst_buffer_list_remove                (GstBufferList *l
 gboolean                 gst_buffer_list_foreach               (GstBufferList *list,
                                                                 GstBufferListFunc func,
 								gpointer user_data);
+GstBufferList *          gst_buffer_list_copy_deep             (const GstBufferList * list);
 
 #define gst_buffer_list_add(l,b) gst_buffer_list_insert((l),-1,(b));
 

tests/check/gst/gstbufferlist.c

@@ -195,6 +195,55 @@ GST_START_TEST (test_copy)
 
 GST_END_TEST;
 
+GST_START_TEST (test_copy_deep)
+{
+  GstBufferList *list_copy;
+  GstMapInfo info, sinfo;
+  GstBuffer *buf1;
+  GstBuffer *buf2;
+  GstBuffer *buf_copy;
+
+  /* add buffers to the list */
+  buf1 = gst_buffer_new_allocate (NULL, 1, NULL);
+  gst_buffer_list_add (list, buf1);
+
+  buf2 = gst_buffer_new_allocate (NULL, 2, NULL);
+  gst_buffer_list_add (list, buf2);
+
+  /* make a copy */
+  list_copy = gst_buffer_list_copy_deep (list);
+  fail_unless (GST_MINI_OBJECT_REFCOUNT_VALUE (list) == 1);
+  fail_unless (GST_MINI_OBJECT_REFCOUNT_VALUE (list_copy) == 1);
+  fail_unless (list_copy != list);
+  fail_unless_equals_int (gst_buffer_list_length (list_copy), 2);
+
+  buf_copy = gst_buffer_list_get (list_copy, 0);
+  /* each buffer in the list is copied and must point to different memory */
+  fail_unless (buf_copy != buf1);
+  ASSERT_BUFFER_REFCOUNT (buf1, "buf1", 1);
+  fail_unless_equals_int (gst_buffer_get_size (buf1), 1);
+
+  buf_copy = gst_buffer_list_get (list_copy, 1);
+  fail_unless (buf_copy != buf2);
+  ASSERT_BUFFER_REFCOUNT (buf2, "buf2", 1);
+  fail_unless_equals_int (gst_buffer_get_size (buf2), 2);
+
+  fail_unless (gst_buffer_map (buf2, &info, GST_MAP_READ));
+  fail_unless (gst_buffer_map (buf_copy, &sinfo, GST_MAP_READ));
+
+  /* NOTE that data is refcounted */
+  fail_unless (info.size == sinfo.size);
+  /* copy_deep() forces new GstMemory to be used */
+  fail_unless (info.data != sinfo.data);
+
+  gst_buffer_unmap (buf_copy, &sinfo);
+  gst_buffer_unmap (buf2, &info);
+
+  gst_buffer_list_unref (list_copy);
+}
+
+GST_END_TEST;
+
 typedef struct
 {
   GstBuffer *buf[2];
@@ -390,6 +439,7 @@ gst_buffer_list_suite (void)
   tcase_add_test (tc_chain, test_remove);
   tcase_add_test (tc_chain, test_make_writable);
   tcase_add_test (tc_chain, test_copy);
+  tcase_add_test (tc_chain, test_copy_deep);
   tcase_add_test (tc_chain, test_foreach);
   tcase_add_test (tc_chain, test_expand_and_remove);
 

win32/common/libgstreamer.def

@@ -149,6 +149,7 @@ EXPORTS
 	gst_buffer_list_new
 	gst_buffer_list_new_sized
 	gst_buffer_list_remove
+	gst_buffer_list_copy_deep
 	gst_buffer_map
 	gst_buffer_map_range
 	gst_buffer_memcmp