Due to rounding used computation, HDB variance computation may produce
slightly negative values. This commit adds clamping to make sure
output variance values for 10 and 12 to be non-negative.
Change-Id: Id679aa55a4c201958c4c7d28cd8733b9246a71c8
This commit fixes the use of uninitialized context values in the
combination of supertx and var-tx.
Change-Id: I2d36badf5c9806ea402ce3e19515cc299e6b79e8
This commit refactors the reference frame structure used in the
dynamic motion vector referencing system, and makes it support
the bi-directional reference frames. This resolves unit test
failure (enc/dec mismatch) when both are turned on.
The compression performance (ref-mv + ext-refs) is improved by
0.2% for lowres.
Change-Id: I233624d8fccc1f69e82295f94de984ff056365dc
This reinstates commit efda2831e5f758b4f350679b5c55c0b9282449b0
without the tests and with fixes for 32 bit x86 builds.
Change-Id: I34be4fe1e8a67686d26ba256fd7efe0eb6a569e8
This commit adds an encoder workaround to support better
compatibility with a non-compliant hardware vp9 profile 2 decoder.
The known issue with this decoder is:
The decoder assumes a wrong value, 127 instead of the correct
value of 511 and 2047, for any assumed top-left corner pixel in
UV planes for 10 and 12 bit, respectively. Such assumed
top-left corner pixel is used for INTRA prediction when a real
decoded/reconstructed pixel is not avalable, e.g. when it is
located inside the row above the top row or inside the column
left to the leftest column of a video image.
Change-Id: Ic15a938a3107e1b85e96cb7903a5c4220986b99d
The tile boundaries should now be respected even between tile rows.
regardless of whether ext-tile is used or not.
Change-Id: I5a39fd274451114a4264215f97f12be2c908016d
When the next two states are identical, skip repeated cost table
fetch and multiplication operations. This makes the trellis unit
about 5% faster.
Change-Id: I0dbf7ad0a5732044e4e45dd59e9431a251c678f2
- Apply signal direction/4-pixel vertical/8-pixel vertical
parallelism.
- Add unit test to verify the bit exact result.
- Overall encoding time improves ~24% on Xeon E5-2680 CPU.
Change-Id: I104dcbfd43451476fee1f94cd16ca5f965878e59
decoding is done if the decoder is available, with errors handled
accordingly. the encoded frame count should be sufficient for this test.
+ remove HandleDecodeResult() as it's redundant given the base
implementation
BUG=webm:1233
Change-Id: I513c1c3475c58a746f4df627491bdc392fe21416
Properly restore the rate cost in the inner search loop of obmc
prediction. This avoids unexpected encoding behavior. It fixes
the unit test failure in obmc experiment:
AltRefForcedKeyTestLarge.Frame1IsKey/2
Change-Id: I667b219dfcf2f2c63d9d984900ed3cfd10c354bd
This commit refactors the trellis coefficient optimization process.
It saves multiplications used to generate the final dequantized
coefficients. It removes two memset operations on quantized
and dequantized coefficient sets. This improves the unit speed
by 10%.
Change-Id: I23f47c6e14582520a7f952f03ce8f72183e7f0e6
