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No point in checking if the size of the subbuffer > 0, the code handles it correclty as demonstrated by unit test.

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Original commit message from CVS:
* gst/gstbuffer.c: (_gst_buffer_copy), (gst_buffer_create_sub):
* tests/check/gst/gstbuffer.c: (GST_START_TEST),
(gst_buffer_suite):
No point in checking if the size of the subbuffer > 0, the
code handles it correclty as demonstrated by unit test.
Also add a unit test for the zero sized _new_and_alloc and
_copy. Fixes #346663.
This commit is contained in:
Wim Taymans 2006-07-05 17:09:18 +00:00
parent d7c7dcc686
commit fa9bb7929e
3 changed files with 61 additions and 4 deletions
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10
ChangeLog
View file

@ -1,3 +1,13 @@
2006-07-05 Wim Taymans <wim@fluendo.com>
* gst/gstbuffer.c: (_gst_buffer_copy), (gst_buffer_create_sub):
* tests/check/gst/gstbuffer.c: (GST_START_TEST),
(gst_buffer_suite):
No point in checking if the size of the subbuffer > 0, the
code handles it correclty as demonstrated by unit test.
Also add a unit test for the zero sized _new_and_alloc and
_copy. Fixes #346663.
2006-07-05 Wim Taymans <wim@fluendo.com>
* libs/gst/base/gstbasetransform.c:

7
gst/gstbuffer.c
View file

@ -210,7 +210,7 @@ _gst_buffer_copy (GstBuffer * buffer)
/* we simply copy everything from our parent */
copy->data = g_memdup (buffer->data, buffer->size);
/* make sure it gets freed (even if the parent is subclassed, we return a
normal buffer */
normal buffer) */
copy->malloc_data = copy->data;
copy->size = buffer->size;
@ -270,6 +270,8 @@ gst_buffer_new (void)
* Creates a newly allocated buffer with data of the given size.
* The buffer memory is not cleared.
*
* Note that when @size == 0, the buffer data pointer will be NULL.
*
* MT safe.
* Returns: the new #GstBuffer.
*/
@ -466,7 +468,7 @@ gst_subbuffer_init (GTypeInstance * instance, gpointer g_class)
* @parent: a #GstBuffer.
* @offset: the offset into parent #GstBuffer at which the new sub-buffer
* begins.
* @size: the size of the new #GstBuffer sub-buffer, in bytes (with size > 0).
* @size: the size of the new #GstBuffer sub-buffer, in bytes.
*
* Creates a sub-buffer from @parent at @offset and @size.
* This sub-buffer uses the actual memory space of the parent buffer.
@ -486,7 +488,6 @@ gst_buffer_create_sub (GstBuffer * buffer, guint offset, guint size)
g_return_val_if_fail (buffer != NULL, NULL);
g_return_val_if_fail (buffer->mini_object.refcount > 0, NULL);
g_return_val_if_fail (size > 0, NULL);
g_return_val_if_fail (buffer->size >= offset + size, NULL);
/* find real parent */

48
tests/check/gst/gstbuffer.c
View file

@ -81,6 +81,17 @@ GST_START_TEST (test_subbuffer)
ASSERT_BUFFER_REFCOUNT (buffer, "parent", 2);
ASSERT_BUFFER_REFCOUNT (sub, "subbuffer", 1);
gst_buffer_unref (sub);
/* create a subbuffer of size 0 */
sub = gst_buffer_create_sub (buffer, 1, 0);
fail_if (sub == NULL, "create_sub of buffer returned NULL");
fail_unless (GST_BUFFER_SIZE (sub) == 0, "subbuffer has wrong size");
fail_unless (memcmp (GST_BUFFER_DATA (buffer) + 1, GST_BUFFER_DATA (sub),
0) == 0, "subbuffer contains the wrong data");
ASSERT_BUFFER_REFCOUNT (buffer, "parent", 2);
ASSERT_BUFFER_REFCOUNT (sub, "subbuffer", 1);
/* clean up */
gst_buffer_unref (sub);
gst_buffer_unref (buffer);
@ -186,7 +197,7 @@ GST_START_TEST (test_span)
gst_buffer_unref (span);
ASSERT_BUFFER_REFCOUNT (buffer, "parent", 3);
/* clean up */
/* clean up */
gst_buffer_unref (sub1);
gst_buffer_unref (sub2);
gst_buffer_unref (buffer);
@ -321,6 +332,39 @@ GST_START_TEST (test_metadata_writable)
GST_END_TEST;
GST_START_TEST (test_copy)
{
GstBuffer *buffer, *copy;
buffer = gst_buffer_new_and_alloc (4);
ASSERT_BUFFER_REFCOUNT (buffer, "buffer", 1);
copy = gst_buffer_copy (buffer);
ASSERT_BUFFER_REFCOUNT (buffer, "buffer", 1);
ASSERT_BUFFER_REFCOUNT (copy, "copy", 1);
/* data must be copied and thus point to different memory */
fail_if (GST_BUFFER_DATA (buffer) == GST_BUFFER_DATA (copy));
gst_buffer_unref (copy);
gst_buffer_unref (buffer);
/* a 0-sized buffer has NULL data as per docs */
buffer = gst_buffer_new_and_alloc (0);
fail_unless (GST_BUFFER_DATA (buffer) == NULL);
fail_unless (GST_BUFFER_SIZE (buffer) == 0);
/* copying a 0-sized buffer should not crash and also set
* the data member NULL. */
copy = gst_buffer_copy (buffer);
fail_unless (GST_BUFFER_DATA (copy) == NULL);
fail_unless (GST_BUFFER_SIZE (copy) == 0);
gst_buffer_unref (copy);
gst_buffer_unref (buffer);
}
GST_END_TEST;
Suite *
gst_buffer_suite (void)
{
@ -335,6 +379,8 @@ gst_buffer_suite (void)
tcase_add_test (tc_chain, test_is_span_fast);
tcase_add_test (tc_chain, test_span);
tcase_add_test (tc_chain, test_metadata_writable);
tcase_add_test (tc_chain, test_copy);
return s;
}