1. 27 Mar, 2013 2 commits
    • 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
  2. 26 Mar, 2013 10 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
    • Dmitry Kovalev's avatar
      Cleaning up rate control code. · 77c664ad
      Dmitry Kovalev authored
      Lower case variable names, declaration and initialization on the same line,
      removing redundant casts to double.
      
      Change-Id: I7ea3905bed827aa6faac11a78401b85e448b57f9
      77c664ad
    • 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
    • Dmitry Kovalev's avatar
      Decomposition of vp9_decode_frame function. · 4a3d7860
      Dmitry Kovalev authored
      Moving code from vp9_decode_frame function into setup_loopfilter and
      setup_segmentation functions. A little bit of cleanup.
      
      Change-Id: I2cce1813e4d7aeec701ccf752bf57e3bdd41b51c
      4a3d7860
    • 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
      Bugfix in model coef prob experiment · d14c7265
      Deb Mukherjee authored
      Fixes an issue with model based update that got into
      the original patch that was merged.
      
      Change-Id: Ie42d3d0aff2e48cd187d96664dbd3e9d6d3ac22f
      d14c7265
    • 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
  3. 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
  4. 22 Mar, 2013 2 commits
    • Paul Wilkins's avatar
      Disable zero bin mode boost. · ec080fa9
      Paul Wilkins authored
      As things stand the zero bin mode boost is hurting somewhat.
      In part this seems to be because the boost applied as is
      interferes with the rd mode selection loop.
      
      Average gains (derf 0.072, yt 0.243, ythd 0.179 std-hd 0.212%)
      
      Change-Id: Icaecea3908d9a7352370e49b8fa822f2c2c49dc1
      ec080fa9
    • Paul Wilkins's avatar
      Minor code clean up · 815734e5
      Paul Wilkins authored
      Change-Id: Ifa864e0acb253b238b03cdeed0fe5d6ee30a45d8
      815734e5
  5. 21 Mar, 2013 3 commits
    • 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
    • Dmitry Kovalev's avatar
      Changing initialization order of mb_to_top_edge & mb_to_bottom_edge · 40794024
      Dmitry Kovalev authored
      Making consistent initialization of mb_to_{top,botton,left,right}_edge
      variables after set_mb_row & set_mb_col calls. A little bit of code cleanup
      additionally.
      
      Change-Id: I245bfe32c5701e9836956dc25cf8c770d109cbc1
      40794024
    • Yunqing Wang's avatar
      Optimize 16x16 idct function · ec310066
      Yunqing Wang authored
      Wrote sse2 version of vp9_short_idct16x16 function. Compared to c
      version, the sse2 version is over 2.5X faster.
      
      Change-Id: I38536e2b846427a2cc5c5423aaf305fd0e605d61
      ec310066
  6. 20 Mar, 2013 1 commit
  7. 19 Mar, 2013 1 commit
  8. 18 Mar, 2013 5 commits
    • Paul Wilkins's avatar
      Changes to rd error_per_bit calculation. · d8ffee45
      Paul Wilkins authored
      Specifically changes to retain more precision
      especially at low Q through to the point of use.
      
      Change-Id: Ief5f010f2ca4daaabef49520e7edb46c35daf397
      d8ffee45
    • Ronald S. Bultje's avatar
      Fix ENTROPY_STATS code in vp9_tokenize.c. · b99dce68
      Ronald S. Bultje authored
      Change-Id: I9b4cb1e2ce6c6a99cffd473ff2fa7579bd318fcd
      b99dce68
    • Yunqing Wang's avatar
      Optimize 8x8 idct function · 6344c84c
      Yunqing Wang authored
      Wrote sse2 functions of vp9_short_idct8x8 and vp9_short_idct10_8x8.
      Compared to c version, the sse2 version is 2X faster. The decoder
      test didn't show noticeable gain since 8x8 idct doesn't take much
      of decoding time (less than 1% in my test).
      
      Change-Id: I56313e18cd481700b3b52c4eda5ca204ca6365f3
      6344c84c
    • John Koleszar's avatar
      Replace scaling byte with explicit display size · 8a3f55f2
      John Koleszar authored
      If the intended display size is different than the size the frame is
      coded at, then send that size explicitly in the bitstream. Adds a new
      bit to the frame header to indicate whether the extra size fields
      are present.
      
      Change-Id: I525c66f22d207efaf1e5f903c6a2a91b80245854
      8a3f55f2
    • Paul Wilkins's avatar
      Adapt ARNR filter length and strength. · cdb322dd
      Paul Wilkins authored
      Adjust the filter length and strength for each
      ARF group based on a measure of difficulty (the boost)
      and the active q range.
      
      Remove lower limit on RDMULT value.
      
      Average gains on the different sets in range 0.4%-0.9%.
      However the ARNR changes give a very big boost on a
      few clips.
      
      Eg. Soccer ~5%, in derf set and Cyclist ~ 10% in the std-hd set
      
      Change-Id: I2078d78798e27ad2bcc2b32d703ea37b67412ec4
      cdb322dd
  9. 16 Mar, 2013 3 commits
    • Deb Mukherjee's avatar
      Context-pred fix to not use top/left on edges · b1921b2f
      Deb Mukherjee authored
      This fix resolves some of the mismatch issues being seen
      recently. While this is the right thing to do when tiling
      is used for this experiment, it is not the underlying cause
      of the the mismatches.
      Something else is causing writing outside of the allowable
      frame area in the encoder leading to this mismatch.
      
      Change-Id: If52c6f67555aa18ab8762865384e323b47237277
      b1921b2f
    • John Koleszar's avatar
      Remove some unused rate control variables · b8ac9f2f
      John Koleszar authored
      These variables are unused, and are subject to overflowing, causing
      assertions when built with -ftrapv.
      
      Change-Id: Ia00a3201af309906c05bcd4b23a643925ed6ea86
      b8ac9f2f
    • John Koleszar's avatar
      Fix use of NaN in firstpass · db5f2cb5
      John Koleszar authored
      If the second reference is better than the first in the long term,
      it was possible to try to take the fractional exponent of a
      negative number, giving an undefined result.
      
      Change-Id: I1dd08286747ceae960eb03bb5d98a383cc9d253b
      db5f2cb5
  10. 15 Mar, 2013 2 commits
    • Christian Duvivier's avatar
      Faster vp9_short_fdct16x16. · 4418b790
      Christian Duvivier authored
      Scalar path is about 1.5x faster (3.1% overall encoder speedup).
      SSE2 path is about 7.2x faster (7.8% overall encoder speedup).
      
      Change-Id: I06da5ad0cdae2488431eabf002b0d898d66d8289
      4418b790
    • Dmitry Kovalev's avatar
      Motion vector code cleanup. · 4a0686e7
      Dmitry Kovalev authored
      Moving identical code to separate functions, variable declaration and
      initialization on the same line.
      
      Change-Id: Ifa6474a64189f9d8051e88e19850453b0227752c
      4a0686e7
  11. 14 Mar, 2013 5 commits
    • Dmitry Kovalev's avatar
      Cleaning up frame decoding functionality. · 9285703e
      Dmitry Kovalev authored
      Change-Id: I25424904fb8541fc19d00d9fbc592379374b98c0
      9285703e
    • Yaowu Xu's avatar
      force lossless coding at very high quality end · 374a1736
      Yaowu Xu authored
      Change-Id: I75fc4eee10bee9efd419d248827290cce8e6d637
      374a1736
    • Yaowu Xu's avatar
      Remove leftover reference to 2nd order dc/ac quant · f4d2ad69
      Yaowu Xu authored
      Change-Id: Ib8dacf1d2797743569771b8f699e40e1aeb085cb
      f4d2ad69
    • John Koleszar's avatar
      Fix pulsing issue with scaling · 9b7be888
      John Koleszar authored
      Updates the YV12_BUFFER_CONFIG structure to be crop-aware. The
      exiting width/height parameters are left unchanged, storing the
      width and height algined to a 16 byte boundary. The cropped
      dimensions are added as new fields.
      
      This fixes a nasty visual pulse when switching between scaled and
      unscaled frame dimensions due to a mismatch between the scaling
      ratio and the 16-byte aligned sizes.
      
      Change-Id: Id4a3f6aea6b9b9ae38bdfa1b87b7eb2cfcdd57b6
      9b7be888
    • John Koleszar's avatar
      Add VP9_GET_REFERENCE control · b3c350a1
      John Koleszar authored
      This is like VP8_COPY_REFERENCE, but returns a pointer to the reference
      frame rather than a copy of it. This is useful when the application
      doesn't know what the size of the reference is, as is the case when
      scaling is in effect.
      
      Change-Id: I63667109f65510364d0e397ebe56217140772085
      b3c350a1
  12. 13 Mar, 2013 4 commits
    • Jingning Han's avatar
      Support +/-2048 motion vector coding · 76c12ab9
      Jingning Han authored
      Enable entropy coding of motion vectors up to +/-2048. Also
      extend the motion search range accordingly.
      
      Change-Id: Iac2bb015e8934521cef83a19edbe967d9f097436
      76c12ab9
    • Yaowu Xu's avatar
      put refmvselection under experiment · 88862c04
      Yaowu Xu authored
      and turn the experiment off by default.
      
      Change-Id: If9e684aa6cc49eacd39f36645a110a447e38d2de
      88862c04
    • Yaowu Xu's avatar
      removed reference to "LLM" and "x8" · 00555263
      Yaowu Xu authored
      The commit changed the name of files and function to remove obselete
      reference to LLM and x8.
      
      Change-Id: I973b20fc1a55149ed68b5408b3874768e6f88516
      00555263
    • John Koleszar's avatar
      fix superframe index marker masks · bd9cd9a1
      John Koleszar authored
      The superframe index marker byte carries data in the lower 5 bits. Only the
      upper 3 should be used as part of the mask to detect it. By masking with
      0xf0, the previous code was incorrect for frames over 65k bytes.
      
      Change-Id: I6248889f5af227457f359a56b2348ef6db87a3b4
      bd9cd9a1