Jingning Han [Tue, 16 Apr 2013 07:18:02 +0000 (00:18 -0700)]
Recursive partition syntax coding
Enable recursive partition information coding from SB64X64 down to
MB16X16. The bit-stream syntax is now supporting rectangular block
sizes. It starts from SB64X64 and recursively describes the partition
type of the current block. If the partition type is PARTITION_NONE,
the block is coded as a single unit; if it is PARTITION_HORZ or
PARTITION_VERT, the block is segmented into two independently coded
rectangular units, with no further partition needed; otherwise, the
block is segmented into 4 square blocks. i.e., PARTITION_SPLIT case,
each can be potentially further partitioned.
Forward adaptive probability modeling is used for the partition
information coding, conditioned on the current block size.
Adrian Grange [Tue, 16 Apr 2013 22:12:20 +0000 (15:12 -0700)]
Fixed overflow test on boost calculation
Normalization of the frame boost value was being done
when it reached the value 1028. The intention was to
keep to a range of 10 bits, so it should have been
clipped above 1023.
John Koleszar [Tue, 9 Apr 2013 17:54:19 +0000 (10:54 -0700)]
Remove the mb_no_coeff_skip flag
This flag was added to VP8 to allow a mode where MB-level skipping
was not allowed, saving a bit per mb. It was never used in practice,
and hasn't been tested in VP9, so remove it.
Yunqing Wang [Thu, 4 Apr 2013 16:56:02 +0000 (09:56 -0700)]
Optimize the scaling calculation
In decoder, the scaling calculation, such as (mv * x_num / x_den),
is fairly time-consuming. In this patch, we check if the scaling
happens or not at frame level, and then decide which function to
call to skip scaling calculation when no scaling is needed. Tests
showed a 3% decoder performance gain.
Adrian Grange [Tue, 2 Apr 2013 22:08:50 +0000 (15:08 -0700)]
Initial addition of multiple ARF frames
This is work-in-progress, it implements multiple ARF
encoding behind an experimental flag.
It adds the ability to insert multiple ARF frames into a
single ARF group. This patch implements the reordering
of the coded frames, and implements a fixed-length coding
pattern. It applies a fixed quantizer strategy based on
where the frame is in the coding sequence.
Further work to modify the rate control strategy is
ongoing and will be submitted via a set of future patches.
In this first step, each ARF group is recursively
bisected and an ARF frame added at that position in the
sequence. The recursion continues until ARF frames are
within MIN_GF_INTERVAL frames.
The code sits behind the "multiple-arf" experimental
flag ("CONFIG_MULTIPLE_ARF"). The experimental flag
"oneshotq" ("CONFIG_ONESHOTQ") also needs to be enabled
for this patch to work correctly.
Jingning Han [Fri, 12 Apr 2013 18:25:53 +0000 (11:25 -0700)]
Enable inter predictor for rectangular block size
Combine superblock inter predictors into a unified function that
allows configurable block width and height. The inter predictions
of block sizes smaller than 16x16 are handled differently. To be
continued on merging them later.
Ronald S. Bultje [Fri, 12 Apr 2013 00:13:02 +0000 (17:13 -0700)]
Move prediction hit counting to update_state().
The probabilities derived from these statistics are used in bitstream
writing; therefore, we should only do this when we actually decide to
use macroblock coding (over superblock coding). Derf gains +0.15%.
Ronald S. Bultje [Thu, 11 Apr 2013 22:56:39 +0000 (15:56 -0700)]
Merge loop over all macroblock modes into encode_sb_row().
Rename pick_mb_modes to pick_mb_mode, since it now handles only a
single macroblock. This is consistent with pick_sb_mode handling a
single non-macroblock.
Scott LaVarnway [Wed, 10 Apr 2013 23:46:52 +0000 (19:46 -0400)]
WIP: removing predictor buffer usage from decoder
This patch will use the dest buffer instead of the
predictor buffer. This will allow us in future commits
to remove the extra mem copy that occurs in the dequant
functions when eob == 0. We should also be able to remove
extra params that are passed into the dequant functions.
Ronald S. Bultje [Thu, 11 Apr 2013 17:57:16 +0000 (10:57 -0700)]
Remove unused macroblock versions of reconstruction functions.
More specifically, remove vp9_quantize_mb*, vp9_optimize_mb*,
vp9_inverse_transform_mb* and vp9_transform_mb*. Instead, use the
generic _sb* functions that take a size argument, and call them with
BLOCK_SIZE_MB16X16.
Ronald S. Bultje [Wed, 10 Apr 2013 22:55:59 +0000 (15:55 -0700)]
Make RD superblock mode search size-agnostic.
Merge various super_block_yrd and super_block_uvrd versions into one
common function that works for all sizes. Make transform size selection
size-agnostic also. This fixes a slight bug in the intra UV superblock
code where it used the wrong transform size for txsz > 8x8, and stores
the txsz selection for superblocks properly (instead of forgetting it).
Lastly, it removes the trellis search that was done for 16x16 intra
predictors, since trellis is relatively expensive and should thus only
be done after RD mode selection.
Gives basically identical results on derf (+0.009%).
Jingning Han [Wed, 10 Apr 2013 19:30:20 +0000 (12:30 -0700)]
Make dequant/idct block size independent
The unified dequantization, inverse transform, and adding functions
support rectangular block sizes. Also separate the operations on
luma and chroma components, in the consideration of the txfm_size
for uv components in rectangular block sizes.
projects / libvpx / log