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gst/gstbuffer.c: Set READONLY flag on subbuffers, so that gst_buffer_make_writable() works correctly in all circumsta...

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Original commit message from CVS:
* gst/gstbuffer.c: (gst_subbuffer_init):
Set READONLY flag on subbuffers, so that gst_buffer_make_writable()
works correctly in all circumstances (we could have just copied
the parent buffer's readonly flag, but conceptually it seems
cleaner to mark all subbuffers as read-only). (based on patch
by Alessandro Decina, #314710).
* check/gst/gstbuffer.c: (create_read_only_buffer),
(test_make_writable), (test_subbuffer_make_writable),
(gst_test_suite):
Add some tests for gst_buffer_make_writable().
This commit is contained in:
Tim-Philipp Müller 2005-09-27 13:07:14 +00:00
parent 01085fa26a
commit 246fee258f
4 changed files with 171 additions and 0 deletions
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14
ChangeLog
View file

@ -1,3 +1,17 @@
2005-09-27 Tim-Philipp Müller <tim at centricular dot net>
* gst/gstbuffer.c: (gst_subbuffer_init):
Set READONLY flag on subbuffers, so that gst_buffer_make_writable()
works correctly in all circumstances (we could have just copied
the parent buffer's readonly flag, but conceptually it seems
cleaner to mark all subbuffers as read-only). (based on patch
by Alessandro Decina, #314710).
* check/gst/gstbuffer.c: (create_read_only_buffer),
(test_make_writable), (test_subbuffer_make_writable),
(gst_test_suite):
Add some tests for gst_buffer_make_writable().
2005-09-27 Wim Taymans <wim@fluendo.com>
* gst/gstbin.c: (bin_element_is_semi_sink), (gst_bin_change_state):

78
check/gst/gstbuffer.c
View file

@ -191,6 +191,82 @@ GST_START_TEST (test_span)
GST_END_TEST;
static const char ro_memory[] = "abcdefghijklmnopqrstuvwxyz";
static GstBuffer *
create_read_only_buffer (void)
{
GstBuffer *buf;
buf = (GstBuffer *) gst_mini_object_new (GST_TYPE_BUFFER);
/* assign some read-only data to the new buffer */
GST_BUFFER_DATA (buf) = (guint8 *) ro_memory;
GST_BUFFER_SIZE (buf) = sizeof (ro_memory);
GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_READONLY);
return buf;
}
GST_START_TEST (test_make_writable)
{
GstBuffer *buf, *buf2;
/* create read-only buffer and make it writable */
buf = create_read_only_buffer ();
fail_unless (GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_READONLY),
"read-only buffer should have read-only flag set");
buf = gst_buffer_make_writable (buf);
fail_unless (!GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_READONLY),
"writable buffer must not have read-only flag set");
GST_BUFFER_DATA (buf)[4] = 'a';
gst_buffer_unref (buf);
/* alloc'ed buffer with refcount 1 should be writable */
buf = gst_buffer_new_and_alloc (32);
fail_unless (!GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_READONLY),
"_new_and_alloc'ed buffer must not have read-only flag set");
buf2 = gst_buffer_make_writable (buf);
fail_unless (buf == buf2,
"_make_writable() should have returned same buffer");
gst_buffer_unref (buf2);
/* alloc'ed buffer with refcount >1 should be copied */
buf = gst_buffer_new_and_alloc (32);
fail_unless (!GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_READONLY),
"_new_and_alloc'ed buffer must not have read-only flag set");
gst_buffer_ref (buf);
buf2 = gst_buffer_make_writable (buf);
fail_unless (buf != buf2, "_make_writable() should have returned a copy!");
gst_buffer_unref (buf2);
}
GST_END_TEST;
GST_START_TEST (test_subbuffer_make_writable)
{
GstBuffer *buf, *sub_buf;
/* create sub-buffer of read-only buffer and make it writable */
buf = create_read_only_buffer ();
fail_unless (GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_READONLY),
"read-only buffer should have read-only flag set");
sub_buf = gst_buffer_create_sub (buf, 0, 8);
fail_unless (GST_BUFFER_FLAG_IS_SET (sub_buf, GST_BUFFER_FLAG_READONLY),
"sub-buffer of read-only buffer should have read-only flag set");
sub_buf = gst_buffer_make_writable (sub_buf);
fail_unless (!GST_BUFFER_FLAG_IS_SET (sub_buf, GST_BUFFER_FLAG_READONLY),
"writable buffer must not have read-only flag set");
GST_BUFFER_DATA (sub_buf)[4] = 'a';
gst_buffer_unref (sub_buf);
gst_buffer_unref (buf);
}
GST_END_TEST;
Suite *
gst_test_suite (void)
{
@ -200,6 +276,8 @@ gst_test_suite (void)
suite_add_tcase (s, tc_chain);
tcase_add_test (tc_chain, test_caps);
tcase_add_test (tc_chain, test_subbuffer);
tcase_add_test (tc_chain, test_subbuffer_make_writable);
tcase_add_test (tc_chain, test_make_writable);
tcase_add_test (tc_chain, test_is_span_fast);
tcase_add_test (tc_chain, test_span);
return s;

1
gst/gstbuffer.c
View file

@ -392,6 +392,7 @@ gst_subbuffer_finalize (GstSubBuffer * buffer)
static void
gst_subbuffer_init (GTypeInstance * instance, gpointer g_class)
{
GST_BUFFER_FLAG_SET (GST_BUFFER_CAST (instance), GST_BUFFER_FLAG_READONLY);
}
/**

78
tests/check/gst/gstbuffer.c
View file

@ -191,6 +191,82 @@ GST_START_TEST (test_span)
GST_END_TEST;
static const char ro_memory[] = "abcdefghijklmnopqrstuvwxyz";
static GstBuffer *
create_read_only_buffer (void)
{
GstBuffer *buf;
buf = (GstBuffer *) gst_mini_object_new (GST_TYPE_BUFFER);
/* assign some read-only data to the new buffer */
GST_BUFFER_DATA (buf) = (guint8 *) ro_memory;
GST_BUFFER_SIZE (buf) = sizeof (ro_memory);
GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_READONLY);
return buf;
}
GST_START_TEST (test_make_writable)
{
GstBuffer *buf, *buf2;
/* create read-only buffer and make it writable */
buf = create_read_only_buffer ();
fail_unless (GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_READONLY),
"read-only buffer should have read-only flag set");
buf = gst_buffer_make_writable (buf);
fail_unless (!GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_READONLY),
"writable buffer must not have read-only flag set");
GST_BUFFER_DATA (buf)[4] = 'a';
gst_buffer_unref (buf);
/* alloc'ed buffer with refcount 1 should be writable */
buf = gst_buffer_new_and_alloc (32);
fail_unless (!GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_READONLY),
"_new_and_alloc'ed buffer must not have read-only flag set");
buf2 = gst_buffer_make_writable (buf);
fail_unless (buf == buf2,
"_make_writable() should have returned same buffer");
gst_buffer_unref (buf2);
/* alloc'ed buffer with refcount >1 should be copied */
buf = gst_buffer_new_and_alloc (32);
fail_unless (!GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_READONLY),
"_new_and_alloc'ed buffer must not have read-only flag set");
gst_buffer_ref (buf);
buf2 = gst_buffer_make_writable (buf);
fail_unless (buf != buf2, "_make_writable() should have returned a copy!");
gst_buffer_unref (buf2);
}
GST_END_TEST;
GST_START_TEST (test_subbuffer_make_writable)
{
GstBuffer *buf, *sub_buf;
/* create sub-buffer of read-only buffer and make it writable */
buf = create_read_only_buffer ();
fail_unless (GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_READONLY),
"read-only buffer should have read-only flag set");
sub_buf = gst_buffer_create_sub (buf, 0, 8);
fail_unless (GST_BUFFER_FLAG_IS_SET (sub_buf, GST_BUFFER_FLAG_READONLY),
"sub-buffer of read-only buffer should have read-only flag set");
sub_buf = gst_buffer_make_writable (sub_buf);
fail_unless (!GST_BUFFER_FLAG_IS_SET (sub_buf, GST_BUFFER_FLAG_READONLY),
"writable buffer must not have read-only flag set");
GST_BUFFER_DATA (sub_buf)[4] = 'a';
gst_buffer_unref (sub_buf);
gst_buffer_unref (buf);
}
GST_END_TEST;
Suite *
gst_test_suite (void)
{
@ -200,6 +276,8 @@ gst_test_suite (void)
suite_add_tcase (s, tc_chain);
tcase_add_test (tc_chain, test_caps);
tcase_add_test (tc_chain, test_subbuffer);
tcase_add_test (tc_chain, test_subbuffer_make_writable);
tcase_add_test (tc_chain, test_make_writable);
tcase_add_test (tc_chain, test_is_span_fast);
tcase_add_test (tc_chain, test_span);
return s;