gst_adapter_masked_scan_uint32 could return values smaller than offset
if the first byte(s) of the mask are 0 and the pattern matches the
beginning of the adapter.
Added examples to documentation of gst_adapter_masked_scan_uint32().
Also added some more masked boundary tests.
Fixes#584118
Add a reasonably optimized new gst_adapter_masked_scan_uint32() function
to scan the adapter for a pattern after applying a mask.
Add some unit tests.
API: GstAdapter::gst_adapter_masked_scan_uint32()
Fixes#583187
When a are requested to take a buffer from the adapter that is exactly the
headbuffer, don't make a subbuffer of it but return that head buffer.
Add a unit-test for this new optimisation.
Original commit message from CVS:
* Makefile.am:
* configure.ac:
* libs/gst/base/gstadapter.c: (gst_adapter_clear),
(gst_adapter_push), (gst_adapter_peek_into), (gst_adapter_peek),
(gst_adapter_flush), (gst_adapter_take), (gst_adapter_take_buffer):
* libs/gst/base/gstadapter.h:
* tests/check/libs/adapter.c: (create_and_fill_adapter),
(GST_START_TEST), (gst_adapter_suite):
* tests/examples/Makefile.am:
Do some optimisation work in GstAdapter to avoid copies in more cases.
It could still do slightly better by merging buffers when
gst_buffer_is_span_fast is true, but is already faster.
Also, avoid traversing a single-linked list to append each incoming
buffer inside the adapter.
Add simple test app that times the adapter behaviour in different
situations, and extend the unit test to check that bytes enter and
exit the adapter in their original order.
Original commit message from CVS:
* docs/libs/gstreamer-libs-sections.txt:
API: addition: gst_adapter_take_buffer()
* libs/gst/base/gstadapter.c: (gst_adapter_push),
(gst_adapter_peek), (gst_adapter_take), (gst_adapter_take_buffer),
(gst_adapter_available_fast):
* libs/gst/base/gstadapter.h:
Prepare for optimizing the hell out of this hugely inefficient
piece of code.
Added gst_adapter_take_buffer() so we can at least start thinking
about subbuffering and merging.
Added some comments.
* tests/check/Makefile.am:
* tests/check/libs/adapter.c: (GST_START_TEST),
(gst_adapter_suite), (main):
Added GstAdapter check.
