No RDO as yet, but the deblocking filter and parameter infrastructure are
full implemented, functional and tested.

* Modify plane data structure to allow for padded border

* Pad reconstructed frame

* Have ME consider motion vectors pointing outside frame boundary

* Remove clamping inside motion compensation loop

Clamping is now done outside the loop and relies on the frame
being padded.

* Reduce size of intermediate buffer in motion compensation

* Update encode/decode tests

* CPU feature check for SSSE3.
* Measure rdo_cfl_alpha() speed.
* Remove redundant loop for 2x speed-up of rdo_cfl_alpha().
* Allow rdo_cfl_alpha() to return None.
* Tidy up formatting.

Gideon Mayhak authored 6 years ago and Thomas Daede committed 6 years ago

Added information about AppVeyor Windows builds, and other minor edits.

This reduces the time for cdef_filter_frame by ~33%.

Change MV mode if NEAREST isn't NEAREST anymore instead of doing repeated RDO optimizations. Improves run time by about 20-25%.

Add assert statement to check that nearest MV is indeed the same
as the MV passed as argument to encode_block_b()

Move MV stack construction out of encoding function such that the
value of the nearest MV can be determined before encoding

* Move motion compensation to separate function

* Motion compensate for every iteration of tx search

Yushin Cho authored 6 years ago and Yushin Cho committed 6 years ago

Also does pulling tx_type_rdo() out of chroma RDO, as requested in #521.

* Move SAD computation into a separate function

* Always inline SAD function for speed

This yields an ~4x speed-up of this function.
Update sameness test with in-range values.
Return early for zero alpha.
Elide bounds checks from SSSE3 implementation
Bounds are enforced in the safe wrapper.

Frank Bossen authored 6 years ago and Thomas Daede committed 6 years ago

Move .take() ealier in the chain as suggested by lu-zero

Frank Bossen authored 6 years ago and Thomas Daede committed 6 years ago

Use single loop for all coefficients

Frank Bossen authored 6 years ago and Thomas Daede committed 6 years ago

Speed up probability update function

Remove array and compute values on the fly instead

Add reference frame structure to capture YUV data and probabilities
of a previously decoded frame.
Symbol counts are reset and not carried from one frame to the next.
Error resilient mode is disabled to support this feature.

Add 1/8th pel motion refinement step but don't enable it by default

Currently this feature yields an average loss of about 1 percent
BD rate

Add storage for block-level loop deblocking filter delta adjustments, as well as infrastructure for writing out these parameters.

Unused as yet.  No funcitonal change to current encoder.

This patch implements the block-level deblocking filter params set by the frame header.

As requested by Yushin in 490

Frank Bossen authored 6 years ago and Yushin Cho committed 6 years ago

Search 1/2 pel square, then 1/4 pel square

Implement motion compensation interpolation filters since chroma
may now require half-sample interpolation

Frank Bossen authored 6 years ago and Yushin Cho committed 6 years ago

Removal suppresses compiler warnings

Motion estimation code should be about 3x faster. Disassembly of
compiled code shows use of SIMD instructions.

* Add the chroma-from-luma predictor and a test
* Add benchmarks for CfL predictor
* Implement CfL signalling
* Plumb from predict_intra to pred_cfl
* Add struct for CfL parameters
* Compute subsampled luma AC and plumb it with CfL alpha
* Plumb CfL parameters up to RDO
* Add CfL to RDO loop, no parameter search