Replace subbuffer and copy vmethods by a more generic transform function that
can then be parametrised by transform specific data. This should allow us to
implement make-writable and more future transform functions.
Keep a pointer to the bufferpool. Release the buffer to the pool when
finalizing. Make sure the pool sets itself as the pool member of buffers that it
sends out.
Make separate api for getting and adding metadata. This allows us to pass extra
parameters to the init functions when creating metadata, which is needed for
specific API implementations.
Add beginnings of memory metadata.
Add first implementation of arbitrary buffer metadata. We use a simple linked
linked of slice allocated metadata chunks. Future implementations could use
something more performant.
Add get, remove, iterate methods to handle the metadata.
Make sure we execute the same code path in git versions and in releases,
so just warn when metadata isn't writable when we want it to be instead
of bailing out.
The alignment guaranteed by malloc is not always sufficient. E.g. vector
instructions or hardware subsystems want specifically aligned buffers. The
attached patch will use posix_memalign if available to allocate buffers.
The desired alignment can be set when running configure using the new
--with-buffer-alignment option.
Move the parent buffer pointer into the GstBuffer struct so that we can
remove the subbuffer class and type. This is interesting because it allows us to
more naturally implement methods to get the real type and parent
of a subbuffer (See #545501).
It should also be slightly faster because there is no extra object hierarchy to
initialize and free.
Check for metadata writability when setting caps on buffer or when copying
metadata flags. Only enable these extra assertions in git versions.
This should help us find bad elements.
Original commit message from CVS:
* gst/gstbuffer.c: (gst_buffer_finalize):
Avoid costly typechecking for trivially correct pointers.
* gst/gstpoll.c: (gst_poll_wait):
Add some G_LIKELY here and there.
* libs/gst/base/gstadapter.c: (gst_adapter_push):
Add some debug info.
Original commit message from CVS:
2008-10-06 Andy Wingo <wingo@pobox.com>
* gst/gstbuffer.h (GST_BUFFER_FREE_FUNC): New API, a free function
that will be called on the malloc_data to free it. Basically a way
to avoid subclassing when all you need is a different free
function, i.e. free() instead of g_free().
* gst/gstbuffer.c (gst_buffer_finalize): Free malloc_data via
calling the free function.
(gst_buffer_init): Initialize the free function to g_free.
Original commit message from CVS:
* gst/gstbuffer.c:
Update some comments.
* tools/gst-inspect.c: (print_element_properties_info):
Improve printing of flags.
Original commit message from CVS:
* gst/gstbuffer.c: (gst_buffer_finalize):
Make it once again possible to free GstBuffers in the default
build.
The poisoning scribbles on parts of the miniobject we need in
order to free it.
Fixes#480341
Original commit message from CVS:
* gst/gstbuffer.c: (gst_buffer_finalize):
Implement poisoning for GstBuffer if --enable-poisoning is specified.
When finalizing a buffer the complete struct is filled with 0xff,
thus making a use of the buffer after the final unref impossible.
Original commit message from CVS:
* docs/gst/gstreamer-sections.txt:
* gst/gstbuffer.c: (gst_buffer_try_new_and_alloc):
* gst/gstbuffer.h:
* tests/check/gst/gstbuffer.c: (GST_START_TEST),
(gst_buffer_suite):
API: add gst_buffer_try_new_and_alloc() plus unit test (#431940).
Original commit message from CVS:
* gst/gstbuffer.c: (gst_buffer_make_metadata_writable),
(gst_buffer_create_sub):
Copy duration/offset_end/caps when creating a subbuffer of the
complete parent.
Make the subbuffer read-only when we make the metadata writable for
now. Fixes#351768.
* tests/check/gst/gstbuffer.c: (GST_START_TEST):
Added check for metadata copy when creating subbuffers.
Original commit message from CVS:
* gst/gstbuffer.c:
* gst/gsttask.c: (gst_task_join):
Small doc updates.
* gst/gstpad.c: (gst_pad_activate_pull), (gst_pad_activate_push),
(gst_pad_stop_task):
When pad (de)activation failed for some reason, restore the old
activation mode and set the pad to flushing instead of assuming the
pad is deactivated.
If the _task_join() failed, reinstall the task on the pad so that it can
be stopped later and return an error.
Original commit message from CVS:
* gst/gstbuffer.c: (gst_buffer_get_type), (gst_buffer_new),
(gst_subbuffer_get_type), (gst_buffer_create_sub):
Avoid function call for known types by keeping the buffer and
subbuffer GType global.
* plugins/elements/gstfilesrc.c: (gst_file_src_create_read):
Random silly optimisations in read() path.
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.
Original commit message from CVS:
* gst/gstbuffer.c: (gst_buffer_get_type), (gst_buffer_finalize),
(_gst_buffer_copy), (gst_buffer_is_metadata_writable),
(gst_subbuffer_finalize), (gst_buffer_create_sub),
(gst_buffer_is_span_fast), (gst_buffer_span):
Init _type for consistency.
Use _FLAGS macro to avoid type check.
Avoid unneeded type checks in subbufer code.
