This commit makes the encoder to perform motion search only once
per reference frame type for each 4x4/4x8/8x4 block. For bus_cif
at 2000 kbps, the runtime goes from 253812ms -> 217817ms
(14% speed-up) for speed 0.
Change-Id: I5f17599ccc8cfaf93ccb4f98fcb6008af6d79e92
Removing tile_rows and tile_columns from VP9Common, removing redundant
constants MIN_TILE_WIDTH and MAX_TILE_WIDTH, changing signature of
vp9_get_tile_n_bits.
Change-Id: I8ff3104a38179b2c6900df965c144c1d6f602267
Cosmetic code changes, renaming 'flat' local var to 'mask', removing
unused field 'blim' from loopfilter_info_n and loop_filter_info structs.
Change-Id: I51e6ccf727fe361ad9a08e29e1201aa7abd4987f
This commit enables SSE2 implementation of 16x16 inverse ADST/DCT
hybrid transform. The runtime goes from 5742 cycles -> 1821 cycles.
This provides about 1% encoding speed-up at speed 0.
Change-Id: I1678d0988bf30b9efd524877705bbb3645edb17b
Making implementation of vp9_set_pred_flag_{seg_id, mbskip} consistent
with vp9_get_segment_id without using confusing sub(a, b) macro. Passing
mi_row and mi_col to functions explicitly instead of replying on
mb_to_right_edge and mb_to_bottom_edge.
Change-Id: I54c1087dd2ba9036f8ba7eb165b073e807d00435
In the prior code, the above context pointers used for entropy
decoding were initialized on the first frame, and not updated when
the frame size changed. The per-frame code which initializes the
contexts assumes that the contexts are contiguous, leading to an
incomplete initialization when the frame is smaller. This commit
updates the pointers so that the context is contigous whenever
the frame size changes.
Change-Id: I08b53e3a30c8289491212311682ff1b8028cff6c
This is a short term optimization till we work out a decoder
implementation requiring no frame border extension.
Change-Id: I02d15bfde4d926b50a4e58b393d8c4062d1be70f
Cycle times:
4x4: 151 to 131 cycles (15% faster)
8x8: 334 to 306 cycles (9% faster)
16x16: 1401 to 1368 cycles (2.5% faster)
32x32: 7403 to 7367 cycles (0.5% faster)
Total encode time of first 50 frames of bus @ 1500kbps (speed 0)
goes from 1min39.2 to 1min38.6, i.e. a 0.67% overall speedup.
Change-Id: I799a49460e5e3fcab01725564dd49c629bfe935f
Renaming flatmask4 to flat_mask4, flatmask5 to flat_mask5, hevmask to
hev_mask, filter to filter4, mbfilter to filter8, wide_mbfilter to
filter16.
Change-Id: Ic61c73e59c2eee505257584867aafac99833cea1
Also inline some of the block calculations to assist the compiler to
not do silly things like calculating the same offset (or converting
between raster/transform block offset or block, mi and pixel unit)
many, many, many times.
Cycle times:
4x4: 584 -> 505 cycles (16% faster)
8x8: 1651 -> 1560 cycles (6% faster)
16x16: 7897 -> 7704 cycles (2.5% faster)
32x32: 16096 -> 15852 cycles (1.5% faster)
Overall, this saves about 0.5 seconds (1min49.8 -> 1min49.3) on the
first 50 frames of bus (speed 0) @ 1500kbps, i.e. 0.5% overall.
Change-Id: If3dd62453f8e2ab9d4ee616bc4ea956fb8874b80
Removing unused DEC_DEBUG define and dec_debug variable. Changing function
signatures to eliminate code duplication, renaming function
mb_init_dequantizer to init_dequantizer. Also removing redundant curly
braces, and comments.
Change-Id: Ia56ee1b0be5f24abb0e878581845be8a4773c298
Change the mbfilter Neon code from executing both branches if all
vectors follow only one branch.
The code is about 5% faster when executing only one branch and about
1% slower when executing both branches.
-PS5: Remove local stack space from mbfilter.
Change-Id: I6a23f9b318a9f4568a2718b4c9348db988fe2182
Skip the inverse transform and reconstruction of inter-mode coded
blocks in the rate-distortion optimization loop, when skip_encode_sb
feature is turned on. This provides about 1% speed-up at speed 0,
and 1.5% speed-up at speed 1. No performance change in both settings.
Change-Id: I2932718bf4d007163702b61b16b6ff100cf9d007
This speed feature allows the encoder to largely remove the spatial
dependency between blocks inside a 64x64 superblock, thereby removing
the need to repeatedly encode superblocks per partition type in the
rate-distortion optimization loop.
A major challenge lies in the intra modes tested in the rate-distortion
optimization loop. The subsequent blocks do not have access to the
reconstructed boundary pixels without the intermediate coding steps.
This was resolved by using the original pixels for intra prediction
in the rd loop, followed by an appropriately designed distortion
modeling on the quantization parameters. Experiments also suggested
that the performance impact is more discernible at lower bit-rate/psnr
settings. Hence a quantizer dependent threshold is applied to deactivate
skip of block coding.
For bus_cif at 2000 kbps,
speed 0: runtime 269854ms -> 237774ms (12% speed-up) at 0.05dB
performance loss.
speed 1: runtime 65312ms -> 61536ms, (7% speed-up) at 0.04dB
performance loss.
This operation is currently turned on in settings of speed 1.
Change-Id: Ib689741dfff8dd38365d8c1b92860a3e176f56ec
