Jingning Han [Mon, 6 Jan 2014 21:29:16 +0000 (13:29 -0800)]
Remove avoid_frame_with_high_error from RD loop
The feature undergoes prior assumption that the recursive partition
size search from 4x4 to 64x64, hence utilizing information from small
blocks to determine early termination in large block rate-distortion
optimization search. The current codebase is now going from top down.
The previous function might go with not properly initialized values,
hence removed.
Tested on pedestrian_area_1080p at 4000 kbps running under speed 2.
No visible difference in runtime observed.
Deb Mukherjee [Fri, 3 Jan 2014 23:41:57 +0000 (15:41 -0800)]
Corerctly sets frame type in the 2 pass case
This patch sets frame types correctly in the new
vp9_get_second_pass_params() function called prior
to encode_frame_to_data_rate() function, so that the
latter function can just work with what is passed to
it. This will allow multiple vp9_get_second_pass_params()
to be created for various encode strategies without
messing with the core encode function.
There is no difference in derf and yt. stdhd/hd are pending.
Jingning Han [Fri, 3 Jan 2014 23:05:25 +0000 (15:05 -0800)]
Tune IDCT8_1D macro function interface
This commit adds input/output ports for IDCT8_1D macro function to
provide more flexibility in variable use. It allows to skip several
buffer swap operations.
Jingning Han [Thu, 2 Jan 2014 23:33:38 +0000 (15:33 -0800)]
Rework idct8x8_10 SSE2 implementation
This commit optimizes the SSE2 implmentation of idct8x8_10. It exploits
the fact that only top-left 4x4 block contains non-zero coefficients,
and hence reduces the instructions needed.
The runtime of idct8x8_10_sse2 goes down from 216 to 198 CPU cycles,
estimated by averaging over 100000 runs. For pedestrian_area_1080p 300
frames coded at 4000kbps, the average decoding speed goes up from
79.3 fps to 79.7 fps.
Paul Wilkins [Thu, 2 Jan 2014 15:45:06 +0000 (15:45 +0000)]
Modified Handling of min and max vbr rates.
In two pass encodes bits are allocated to each frame
according to a modified error score for the frame as a
fraction of the modified error score for the clip or section.
Previously a minimum rate per frame was reserved and
subtracted from the bits allocatable by the two pass code.
The vbr max section rate was enforced by clipping the
actual number of bits allocated.
In this patch the min and max vbr rates are enforced
instead by clipping the modified error scores for each frame
rather than the number of bits allocated.
Small gains for all test sets (psnr and SSIM) ranging from
~ +0.05 for YT psnr up to ~ +0.25 for Std-hd SSIM.
Dmitry Kovalev [Fri, 27 Dec 2013 22:01:12 +0000 (14:01 -0800)]
Removing vpx_codec_vp9x_cx and internal experimental flag.
vpx_codec_vp9x_cx is not used internally. Experimental flag from
vp9_extracfg is also not really used. YUV 4:4:4 just works after these
changes (you have to specify --profile=1 for the encoder).
Jingning Han [Fri, 20 Dec 2013 23:24:22 +0000 (15:24 -0800)]
Adaptive motion control on ref and search range
This commit takes a preliminary attempt to refine the motion search
control. It detects the SAD associated with mv predictor per reference
frame, and based on which to determine whether the encoder wants to
reduce the motion search range (if the predicted mv provides fairly
small SAD), or to skip the current reference frame (if there exists
another ref frame that gives much smaller SAD cost).
This feature is turned on in the settings of speed 1 and above.
In speed 1, compression performance changed
derf -0.018%
yt -0.043%
hd -0.045%
stdhd -0.281%
Jingning Han [Fri, 20 Dec 2013 02:41:29 +0000 (18:41 -0800)]
Store the SSE of prediction residuals
Buffer the SSE of prediction residuals in the rate-distortion
optimization loop of a given block. This information would be used
for later encoding control.
Dmitry Kovalev [Fri, 20 Dec 2013 00:06:33 +0000 (16:06 -0800)]
Using single struct to represent scale factors.
Moving back to scale_factors struct. We don't need anymore x_offset_q4 and
y_offset_q4 because both values are calculated locally inside vp9_scale_mv
function.
Dmitry Kovalev [Thu, 19 Dec 2013 19:16:05 +0000 (11:16 -0800)]
Call set_scaled_offsets() just before scale_mv() call.
Before mv scaling it is required to calculate x_offset_q4/y_offset_q4
by calling set_scaled_offsets(). Now offset configuration can not be
missed because it happens just before scale_mv().
Deb Mukherjee [Wed, 18 Dec 2013 18:26:27 +0000 (10:26 -0800)]
Begin refactor of frame schedule in rate control
Various cleanups and streamlining of interfaces as precursor
to further advancements in rate control.
Pre-encode parameter setting for different use cases:
One-pass, first of 2-pass, second of 2-pass, and Svc
are separated out.
projects / libvpx / log