Add an index to gst_buffer_take_memory() so that we can also insert memory at a
certain offset. This is mostly interesting to prepend a header memory block to
the buffer.
Add a function to retrieve a list of buffers containing the first N bytes from
the adapter. This can be done without a memcpy and should make it possible to
transfer the list to a GstBufferList later.
Retain the last scanned buffer entry and offset, so we can resume buffer
scanning there in case of a typical progressive scan.
Also potentially optimize _copy subsequently occurring in that area.
This avoids:
* triple-checking for the GType when type-checking is enabled (see #597260)
* Avoids going through an expensive no-argument checking which landed in
glib-2.22
* Avoids going through 2 extrac functions (g_object_new -> g_object_new_valist)
Clarify byte reader docs a bit: offset is relative to the current
position of the reader, not to the start of the data. Also, the
examples in both the adapter docs and the byte reader docs have
the mask and pattern arguments swapped (see #587561). Spotted
by Carl-Anton Ingmarsson.
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
Don't use realloc to grow the scratch area because we don't want the memcpy the
old useless data into the new area before we write our new stuff in it.
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:
* 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:
* gst/gstelement.c: (gst_element_get_state_func):
Don't output the same debug statement twice.
* libs/gst/base/gstadapter.c: (gst_adapter_try_to_merge_up),
(gst_adapter_peek), (gst_adapter_take_buffer):
Optimise the case where we have buffers at the head of the queue that
can be joined quickly (because they're contiguous sub-buffers) by
merging them together rather than copying data out into new memory.
* gst/parse/grammar.y:
* tests/check/pipelines/parse-launch.c:
Fix a leak in an error path for parse_launch, and add a check
for it to the testsuite.
Original commit message from CVS:
* libs/gst/base/gstadapter.c: (gst_adapter_take_buffer):
Make take_buffer a bit quicker by removing redundant checks
caused by calling gst_adapter_take.
Original commit message from CVS:
Patch by: David Schleef <ds at schleef dot org>
* docs/libs/gstreamer-libs-sections.txt:
* libs/gst/base/gstadapter.c: (gst_adapter_copy):
* libs/gst/base/gstadapter.h:
API: gst_adapter_copy() that can reduce the amount of memcpy when
getting data from the adapter. Fixes#388201.
Original commit message from CVS:
* libs/gst/base/gstadapter.c: (gst_adapter_flush),
(gst_adapter_take_buffer):
Fix format string to use all its arguments.
Remove useless >= check on a guint
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.
