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John Koleszar bd84685f78 Optimize vp9_tree_probs_from_distribution 
The previous implementation visited each node in the tree multiple times
because it used each symbol's encoding to revisit the branches taken and
increment its count. Instead, we can traverse the tree depth first and
calculate the probabilities and branch counts as we walk back up. The
complexity goes from somewhere between O(nlogn) and O(n^2) (depending on
how balanced the tree is) to O(n).

Only tested one clip (256kbps, CIF), saw 13% decoding perf improvement.

Note that this optimization should port trivially to VP8 as well. In VP8,
the decoder doesn't use this function, but it does routinely show up
on the profile for realtime encoding.

Change-Id: I4f2848e4f41dc9a7694f73f3e75034bce08d1b12
2013-03-10 13:39:30 -07:00
..
generic
Convert subpixel filters to use convolve framework
2013-02-05 14:23:17 -08:00
ppc
Convert subpixel filters to use convolve framework
2013-02-05 14:23:17 -08:00
x86
Merge "Optimize vp9_short_idct4x4llm function" into experimental
2013-03-04 14:13:31 -08:00
vp9_alloccommon.c
Remove NEWCOEFCONTEXT experiment.
2013-02-13 15:12:17 +00:00
vp9_alloccommon.h
Use standard integer types for pixel values and coefficients.
2012-12-18 15:31:19 -08:00
vp9_asm_com_offsets.c
Remove ARM optimizations from VP9
2012-12-05 08:59:25 -08:00
vp9_blockd.c
Make superblocks independent of macroblock code and data.
2013-03-04 16:34:36 -08:00
vp9_blockd.h
Make superblocks independent of macroblock code and data.
2013-03-04 16:34:36 -08:00
vp9_coefupdateprobs.h
Use standard integer types for pixel values and coefficients.
2012-12-18 15:31:19 -08:00
vp9_common.h
Use configure checks for various inline keywords.
2013-02-06 16:12:56 -08:00
vp9_context.c
fixed includes to be fully specified
2012-11-28 10:53:17 -08:00
vp9_convolve.c
Use 256-byte aligned filter tables
2013-02-27 08:22:39 -08:00
vp9_convolve.h
Spatial resamping of ZEROMV predictors
2013-02-26 23:54:23 -08:00
vp9_debugmodes.c
Replace as_mv struct with array
2013-02-08 20:23:35 -08:00
vp9_default_coef_probs.h
Make superblocks independent of macroblock code and data.
2013-03-04 16:34:36 -08:00
vp9_entropy.c
Optimize vp9_tree_probs_from_distribution
2013-03-10 13:39:30 -07:00
vp9_entropy.h
Make superblocks independent of macroblock code and data.
2013-03-04 16:34:36 -08:00
vp9_entropymode.c
Optimize vp9_tree_probs_from_distribution
2013-03-10 13:39:30 -07:00
vp9_entropymode.h
Refactoring of switchable filter search for speed
2013-02-20 18:34:42 -08:00
vp9_entropymv.c
Optimize vp9_tree_probs_from_distribution
2013-03-10 13:39:30 -07:00
vp9_entropymv.h
Added update-able mv-ref probabilities.
2013-01-02 14:22:11 +00:00
vp9_extend.c
Use standard integer types for pixel values and coefficients.
2012-12-18 15:31:19 -08:00
vp9_extend.h
Use standard integer types for pixel values and coefficients.
2012-12-18 15:31:19 -08:00
vp9_filter.c
Use 256-byte aligned filter tables
2013-02-27 08:22:39 -08:00
vp9_filter.h
Use 256-byte aligned filter tables
2013-02-27 08:22:39 -08:00
vp9_findnearmv.c
Merge master branch into experimental
2013-03-01 11:06:05 -08:00
vp9_findnearmv.h
Replace as_mv struct with array
2013-02-08 20:23:35 -08:00
vp9_header.h
Use standard integer types for pixel values and coefficients.
2012-12-18 15:31:19 -08:00
vp9_idct.h
Optimize vp9_short_idct4x4llm function
2013-03-04 12:01:27 -08:00
vp9_idctllm.c
Make superblocks independent of macroblock code and data.
2013-03-04 16:34:36 -08:00
vp9_implicit_segmentation.c
Use INT64_MAX instead of LLONG_MAX
2013-01-14 15:57:21 -08:00
vp9_invtrans.c
Make superblocks independent of macroblock code and data.
2013-03-04 16:34:36 -08:00
vp9_invtrans.h
Make superblocks independent of macroblock code and data.
2013-03-04 16:34:36 -08:00
vp9_loopfilter_filters.c
Use configure checks for various inline keywords.
2013-02-06 16:12:56 -08:00
vp9_loopfilter.c
Merge "Intrinsic version of loopfilter now matches C code" into experimental
2013-01-24 08:45:22 -08:00
vp9_loopfilter.h
Initial sse2 version of the wide loopfilters
2013-01-11 14:54:14 -08:00
vp9_maskingmv.c
Add vp9_ prefix to all vp9 files
2012-11-27 14:12:30 -08:00
vp9_mbpitch.c
Spatial resamping of ZEROMV predictors
2013-02-26 23:54:23 -08:00
vp9_modecont.c
Nearest / Zero Mv default entropy tweak.
2013-02-08 10:16:13 +00:00
vp9_modecont.h
Use standard integer types for pixel values and coefficients.
2012-12-18 15:31:19 -08:00
vp9_modecontext.c
fixed includes to be fully specified
2012-11-28 10:53:17 -08:00
vp9_mv.h
Refactor inter recon functions to support scaling
2013-02-26 10:03:29 -08:00
vp9_mvref_common.c
[WIP] Add column-based tiling.
2013-02-05 15:43:03 -08:00
vp9_mvref_common.h
[WIP] Add column-based tiling.
2013-02-05 15:43:03 -08:00
vp9_onyx.h
Support 16K sequence coding
2013-03-04 11:08:41 -08:00
vp9_onyxc_int.h
Make superblocks independent of macroblock code and data.
2013-03-04 16:34:36 -08:00
vp9_postproc.c
Merge vp9-preview changes into experimental branch
2013-01-08 10:19:59 -08:00
vp9_postproc.h
Use standard integer types for pixel values and coefficients.
2012-12-18 15:31:19 -08:00
vp9_ppflags.h
Use standard integer types for pixel values and coefficients.
2012-12-18 15:31:19 -08:00
vp9_pragmas.h
Use standard integer types for pixel values and coefficients.
2012-12-18 15:31:19 -08:00
vp9_pred_common.c
[WIP] Add column-based tiling.
2013-02-05 15:43:03 -08:00
vp9_pred_common.h
Use standard integer types for pixel values and coefficients.
2012-12-18 15:31:19 -08:00
vp9_quant_common.c
fixed includes to be fully specified
2012-11-28 10:53:17 -08:00
vp9_quant_common.h
Use standard integer types for pixel values and coefficients.
2012-12-18 15:31:19 -08:00
vp9_recon.c
Make superblocks independent of macroblock code and data.
2013-03-04 16:34:36 -08:00
vp9_reconinter.c
Code cleanup and simplification of build_4x4uvmvs function.
2013-03-01 17:50:55 -08:00
vp9_reconinter.h
Spatial resamping of ZEROMV predictors
2013-02-26 23:54:23 -08:00
vp9_reconintra4x4.c
[WIP] Add column-based tiling.
2013-02-05 15:43:03 -08:00
vp9_reconintra.c
Avoid division in intra prediction
2013-02-20 10:37:36 +02:00
vp9_reconintra.h
Removing redundant 'extern' keyword from function declarations.
2013-02-26 15:52:05 -08:00
vp9_rtcd_defs.sh
Merge changes Ifacbf5a0,Ibad7c3dd into experimental
2013-03-05 11:17:14 -08:00
vp9_rtcd.c
Removing redundant 'extern' keyword from function declarations.
2013-02-26 15:52:05 -08:00
vp9_sadmxn.h
Use configure checks for various inline keywords.
2013-02-06 16:12:56 -08:00
vp9_seg_common.c
Segment Skip Flag
2013-01-28 17:28:04 +00:00
vp9_seg_common.h
Use standard integer types for pixel values and coefficients.
2012-12-18 15:31:19 -08:00
vp9_setupintrarecon.c
Use standard integer types for pixel values and coefficients.
2012-12-18 15:31:19 -08:00
vp9_setupintrarecon.h
Removing redundant 'extern' keyword from function declarations.
2013-02-26 15:52:05 -08:00
vp9_subpelvar.h
Use standard integer types for pixel values and coefficients.
2012-12-18 15:31:19 -08:00
vp9_swapyv12buffer.c
Use standard integer types for pixel values and coefficients.
2012-12-18 15:31:19 -08:00
vp9_swapyv12buffer.h
Use standard integer types for pixel values and coefficients.
2012-12-18 15:31:19 -08:00
vp9_systemdependent.h
Merge vp9-preview changes into experimental branch
2013-01-08 10:19:59 -08:00
vp9_tapify.py
Add vp9_ prefix to all vp9 files
2012-11-27 14:12:30 -08:00
vp9_textblit.c
Code cleanup.
2013-02-22 11:03:14 -08:00
vp9_textblit.h
Code cleanup.
2013-02-22 11:03:14 -08:00
vp9_tile_common.c
Add support for tile rows.
2013-02-13 12:31:00 -08:00
vp9_tile_common.h
Code cleanup.
2013-02-22 11:03:14 -08:00
vp9_treecoder.c
Optimize vp9_tree_probs_from_distribution
2013-03-10 13:39:30 -07:00
vp9_treecoder.h
Optimize vp9_tree_probs_from_distribution
2013-03-10 13:39:30 -07:00