1. 05 Apr, 2013 7 commits
  2. 04 Apr, 2013 2 commits
  3. 03 Apr, 2013 3 commits
    • Yunqing Wang's avatar
      Modify vp9_setup_interp_filters function · 4ca882f3
      Yunqing Wang authored
      Took vp9_setup_scale_factors_for_frame() out from
      vp9_setup_interp_filters(), so that it is only called once per
      frame instead of per macroblock. Decoder tests showed a 1.5%
      performance gain.
      
      Change-Id: I770cb09eb2140ab85132f82aed388ac0bdd3a0aa
      4ca882f3
    • Dmitry Kovalev's avatar
      Reimplementation of setup_frame_size. · da0232fd
      Dmitry Kovalev authored
      General code cleanup in loopfilter code. Modification of setup_frame_size,
      so now VP9_COMMON is modified in one place after all width/height checks
      passed.
      
      Change-Id: Iedf32df43a912d7aae788ed276ac6c429973f6fe
      da0232fd
    • Dmitry Kovalev's avatar
      Renaming sb32_coded and sb64_coded fields. · dca8ad17
      Dmitry Kovalev authored
      Renaming sb32_coded to prob_sb32_coded and sb64_coded to prob_sb64_coded.
      
      Change-Id: I6de5cad00a57c3e066d53467f8c38cb6073dce11
      dca8ad17
  4. 02 Apr, 2013 6 commits
  5. 28 Mar, 2013 2 commits
    • Deb Mukherjee's avatar
      Framework changes in nzc to allow more flexibility · fe9b5143
      Deb Mukherjee authored
      The patch adds the flexibility to use standard EOB based coding
      on smaller block sizes and nzc based coding on larger blocksizes.
      The tx-sizes that use nzc based coding and those that use EOB based
      coding are controlled by a function get_nzc_used().
      By default, this function uses nzc based coding for 16x16 and 32x32
      transform blocks, which seem to bridge the performance gap
      substantially.
      
      All sets are now lower by 0.5% to 0.7%, as opposed to ~1.8% before.
      
      Change-Id: I06abed3df57b52d241ea1f51b0d571c71e38fd0b
      fe9b5143
    • Ronald S. Bultje's avatar
      Fix mix-up in pt token indexing. · 9eea9fa2
      Ronald S. Bultje authored
      This fixes uninitialized reads in the trellis, and probably makes the
      trellis do something again.
      
      Change-Id: Ifac8dae9aa77574bde0954a71d4571c5c556df3c
      9eea9fa2
  6. 27 Mar, 2013 8 commits
    • Yaowu Xu's avatar
      define a specific neighborhood for SB64 mv search · 48104f0d
      Yaowu Xu authored
      Change-Id: Ifda91d697c5970c65ce3ec1feac5562124f91782
      48104f0d
    • Dmitry Kovalev's avatar
      Removing redundant function arguments. · 17cddb4e
      Dmitry Kovalev authored
      Almost all arguments for vp9_build_inter32x32_predictors_sb and
      vp9_build_inter64x64_predictors_sb can be deduced from the first macroblock
      argument.
      
      Change-Id: I5d477a607586d05698d5b3b9b9bc03891dd3fe83
      17cddb4e
    • Dmitry Kovalev's avatar
      Extracting common motion vector prediction code. · 52ccff47
      Dmitry Kovalev authored
      Adding b_mv_pred_row and b_mv_pred_col functions, updating
      mi_mv_pred_row and mi_mv_pred_row functions.
      
      Change-Id: I9af068442d4474478375943cc6fce1605d6fc0a5
      52ccff47
    • Dmitry Kovalev's avatar
      General code cleanup. · 180cd5fa
      Dmitry Kovalev authored
      Removing redundant code, lower case variable names, better indentation,
      better parameter names, adding const to readonly parameters.
      
      Change-Id: Ibfdee00f60316fdc5b3f024028c7aaa76a627483
      180cd5fa
    • Dmitry Kovalev's avatar
      Extract setup_frame_size and update_frame_context functions. · 8c69c193
      Dmitry Kovalev authored
      Extracting setup_frame_size and update_frame_context functions. Introducing
      vp9_read_prob function as shortcut for (vp9_prob)vp9_read_literal(r, 8).
      
      Change-Id: Ia5c68fd725b2d1b9c5eb20f69cacb62361b5a3dd
      8c69c193
    • Yunqing Wang's avatar
      Modify idct code to use macro · c6c0657c
      Yunqing Wang authored
      Small modification of idct code.
      
      Change-Id: I5c4e3223944c68e4ccf762f6cf07c990250e4290
      c6c0657c
    • Yunqing Wang's avatar
      Optimize 32x32 idct function · 21a718d9
      Yunqing Wang authored
      Wrote sse2 version of vp9_short_idct_32x32 function. Compared
      to c version, the sse2 version is 5X faster.
      
      Change-Id: I071ab7378358346ab4d9c6e2980f713c3c209864
      21a718d9
    • Ronald S. Bultje's avatar
      Scatter-based scantables. · 513157e0
      Ronald S. Bultje authored
      This gains about 0.2% on derf, 0.1% on hd and 0.4% on stdhd. I can put
      this under an experimental flag if wanted, just trying to get my patch
      queue in shape.
      
      Change-Id: Ibe1a30fe0e0b07bec4802e0f3ff0ba22e505f576
      513157e0
  7. 26 Mar, 2013 9 commits
    • Deb Mukherjee's avatar
      Implicit weighted prediction experiment · 23144d23
      Deb Mukherjee authored
      Adds an experiment to use a weighted prediction of two INTER
      predictors, where the weight is one of (1/4, 3/4), (3/8, 5/8),
      (1/2, 1/2), (5/8, 3/8) or (3/4, 1/4), and is chosen implicitly
      based on consistency of the predictors to the already
      reconstructed pixels to the top and left of the current macroblock
      or superblock.
      
      Currently the weighting is not applied to SPLITMV modes, which
      default to the usual (1/2, 1/2) weighting. However the code is in
      place controlled by a macro. The same weighting is used for Y and
      UV components, where the weight is derived from analyzing the Y
      component only.
      
      Results (over compound inter-intra experiment)
      derf: +0.18%
      yt: +0.34%
      hd: +0.49%
      stdhd: +0.23%
      
      The experiment suggests bigger benefit for explicitly signaled weights.
      
      Change-Id: I5438539ff4485c5752874cd1eb078ff14bf5235a
      23144d23
    • Ronald S. Bultje's avatar
      Add col/row-based coefficient scanning patterns for 1D 8x8/16x16 ADSTs. · d9094d8f
      Ronald S. Bultje authored
      These are mostly just for experimental purposes. I saw small gains (in
      the 0.1% range) when playing with this on derf.
      
      Change-Id: Ib21eed477bbb46bddcd73b21c5c708a5b46abedc
      d9094d8f
    • Ronald S. Bultje's avatar
      Redo banding for all transforms. · 3120dbdd
      Ronald S. Bultje authored
      Now that the first AC coefficient in both directions use the same DC
      as their context, there no longer is a purpose in letting both have
      their own band. Merging these two bands allows us to split bands for
      some of the very high-frequency AC bands.
      
      In addition, I'm redoing the banding for the 1D-ADST col/row scans. I
      don't think the old banding made any sense at all (it merged the last
      coefficient of the first row/col in the same band as the first two of
      the second row/col), which was clearly an oversight from the band being
      applied in scan-order (rather than in their actual position). Now,
      coefficients at the same position will be in the same band, regardless
      what scan order is used. I think this makes most sense for the purpose
      of banding, which is basically "predict energy for this coefficient
      depending on the energy of context coefficients" (i.e. pt).
      
      After full re-training, together with previous patch, derf gains about
      1.2-1.3%, and hd/stdhd gain about 0.9-1.0%.
      
      Change-Id: I7a0cc12ba724e88b278034113cb4adaaebf87e0c
      3120dbdd
    • Ronald S. Bultje's avatar
      Use above/left (instead of previous in scan-order) as token context. · 790fb132
      Ronald S. Bultje authored
      Pearson correlation for above or left is significantly higher than for
      previous-in-scan-order (absolute values depend on position in scan, but
      in general, we gain about 0.1-0.2 by using either above or left; using
      both basically just makes this even better). For eob branch skipping,
      we continue to use the previous token in scan order.
      
      This helps about 0.9% on derf after re-training on a limited data set.
      Full re-training and results on larger-resolution clips are pending.
      
      Note that this commit breaks trellis, so we can probably get further
      gains out of it by fixing trellis at some later point.
      
      Change-Id: Iead68e296fc3a105cca746b5e3da9555d6010cfe
      790fb132
    • Deb Mukherjee's avatar
      Reoptimizing the interpolation filters · 57c97e2a
      Deb Mukherjee authored
      Reoptimizes the 8-tap smooth filter.
      
      Results:
      derf: +0.101%
      yt: +0.157%
      hd: +0.791%
      stdhd: +0.264%
      
      The next step will be to reoptimize the other two filters.
      
      Change-Id: I3d256a510ad9c7c30c33fae4a70fb43dfc708ed0
      57c97e2a
    • Yaowu Xu's avatar
      remove code not in use · 43df87e8
      Yaowu Xu authored
      Change-Id: I4fa46f10e82aca36c563f7ea829e5a3177a0c740
      43df87e8
    • Dmitry Kovalev's avatar
      Cleaning up loopfilter code. · d7209b3a
      Dmitry Kovalev authored
      Lower case variable names, removing redundant variables, declaration and
      initialization on the same line.
      
      Change-Id: Ie0c6c95b14103990eb6a9d7784f8259c662e1251
      d7209b3a
    • John Koleszar's avatar
      Add an in-loop deringing experiment · 441e2eab
      John Koleszar authored
      Adds a per-frame, strength adjustable, in loop deringing filter. Uses
      the existing vp9_post_proc_down_and_across 5 tap thresholded blur
      code, with a brute force search for the threshold.
      
      Results almost strictly positive on the YT HD set, either having no
      effect or helping PSNR in the range of 1-3% (overall average 0.8%).
      Results more mixed for the CIF set, (-0.5 min, 1.4 max, 0.1 avg).
      This has an almost strictly negative impact to SSIM, so examining a
      different filter or a more balanced search heuristic is in order.
      
      Other test set results pending.
      
      Change-Id: I5ca6ee8fe292dfa3f2eab7f65332423fa1710b58
      441e2eab
    • Deb Mukherjee's avatar
      Modeling default coef probs with distribution · fd18d5df
      Deb Mukherjee authored
      Replaces the default tables for single coefficient magnitudes with
      those obtained from an appropriate distribution. The EOB node
      is left unchanged. The model is represeted as a 256-size codebook
      where the index corresponds to the probability of the Zero or the
      One node. Two variations are implemented corresponding to whether
      the Zero node or the One-node is used as the peg. The main advantage
      is that the default prob tables will become considerably smaller and
      manageable. Besides there is substantially less risk of over-fitting
      for a training set.
      
      Various distributions are tried and the one that gives the best
      results is the family of Generalized Gaussian distributions with
      shape parameter 0.75. The results are within about 0.2% of fully
      trained tables for the Zero peg variant, and within 0.1% of the
      One peg variant.
      
      The forward updates are optionally (controlled by a macro)
      model-based, i.e. restricted to only convey probabilities from the
      codebook. Backward updates can also be optionally (controlled by
      another macro) model-based, but is turned off by default. Currently
      model-based forward updates work about the same as unconstrained
      updates, but there is a drop in performance with backward-updates
      being model based.
      
      The model based approach also allows the probabilities for the key
      frames to be adjusted from the defaults based on the base_qindex of
      the frame. Currently the adjustment function is a placeholder that
      adjusts the prob of EOB and Zero node from the nominal one at higher
      quality (lower qindex) or lower quality (higher qindex) ends of the
      range. The rest of the probabilities are then derived based on the
      model from the adjusted prob of zero.
      
      Change-Id: Iae050f3cbcc6d8b3f204e8dc395ae47b3b2192c9
      fd18d5df
  8. 25 Mar, 2013 2 commits
    • Dmitry Kovalev's avatar
      Code cleanup. · 3644a5b6
      Dmitry Kovalev authored
      Fixing function arguments alignment, reusing MIN/MAX and clamp functions.
      
      Change-Id: I87dd5a40ffb65b521b8abbf0fccf2f50552c5309
      3644a5b6
    • Dmitry Kovalev's avatar
      Code cleanup. · 7cc14e59
      Dmitry Kovalev authored
      Lower case variable names, code simplification by using already defined
      clamp and read_le16 functions.
      
      Change-Id: I8fd544365bd8d1daed86d7b2ae0843e4ef80df08
      7cc14e59
  9. 21 Mar, 2013 1 commit
    • Yunqing Wang's avatar
      Optimize 16x16 idct10 function · 869d6c05
      Yunqing Wang authored
      Wrote sse2 version of vp9_short_idct10_16x16 function. Compared
      to c version, the sse2 version is 2.3X faster.
      
      Change-Id: I314c4f09369648721798321eeed6f58e38857f26
      869d6c05