1. 03 Apr, 2017 2 commits
    • Angie Chiang's avatar
      Add av1_predict_intra_block_facade · 3d005e4c
      Angie Chiang authored
      A simpler interface for intra block prediction
      
      Change-Id: I97e3f385746928d87999e6862b1d71a197df0302
      3d005e4c
    • Angie Chiang's avatar
      Add subtract_block() · 19407b52
      Angie Chiang authored
      This function help us merge subtract block code in
      av1_subtract_plane and av1_encode_block_intra.
      
      Change-Id: Ie793d88a218f1082c6fe28900a521f461e34d564
      19407b52
  2. 29 Mar, 2017 2 commits
  3. 28 Mar, 2017 1 commit
  4. 27 Mar, 2017 2 commits
  5. 24 Mar, 2017 2 commits
  6. 23 Mar, 2017 1 commit
  7. 22 Mar, 2017 1 commit
  8. 20 Mar, 2017 2 commits
    • hui su's avatar
      Add av1 prefix to inv_txfm_add · bb9c73b0
      hui su authored
      Change-Id: Id7cbb89ba344770297ef42bf1b09a2b9ba5a1378
      bb9c73b0
    • Alex Converse's avatar
      Port optimize_b cache optimizations to AV1. · c9d2fcc2
      Alex Converse authored
      Bring the following libvpx commits to aom:
      e446ffd Cache optimizations in optimize_b()
      50d3629 Repack vp9_token_state
      
      Saves 24600 bytes of stack in the default configuration.
      
      Change-Id: If9d6506cf3fe1c34ab639dedb3ef62a996293781
      c9d2fcc2
  9. 16 Mar, 2017 1 commit
    • Alex Converse's avatar
      Account for elided extrabits during rate cost calculation. · da3d94fe
      Alex Converse authored
      Fixes some rd-debug mismatches coding cat6 tokens with tx size < 32x32.
      For these tokens the high extrabits are elided during tokenization and
      detokenization, but the rd cost was computed with the old tables from
      VP9 where these high extrabits are always coded.
      
      Change-Id: I4a9a6ea822ff821e1932c351d43a57bdb4d6d466
      da3d94fe
  10. 15 Mar, 2017 1 commit
    • Thomas Davies's avatar
      NEW_TOKENSET: improve RDO. · 10525758
      Thomas Davies authored
      Modify av1_coef_cost to reflect that EOB values are sent
      with each non-zero coefficient, and modify chroma weight
      to preserve original chroma balance.
      
      AWCY, objective-1-fast, new_token+ec_adapt vs ec_multisymbol:
      
      PSNR YCbCr:     -0.43%      -0.52%      -0.58%
      PSNRHVS:        -0.81%
      SSIM:           -0.73%
      MSSSIM:         -0.93%
      CIEDE2000:      -0.36%
      
      This change:
      
      PSNR YCbCr:     -0.15%      0.83%      0.77%
      PSNRHVS:        -0.24%
      SSIM:           -0.23%
      MSSSIM:         -0.24%
      CIEDE2000:       0.24%
      
      Change-Id: I7f2dd9f3cd24bb64eb4131cba94dda466b9691b0
      10525758
  11. 14 Mar, 2017 1 commit
  12. 01 Mar, 2017 1 commit
  13. 27 Feb, 2017 1 commit
  14. 25 Feb, 2017 1 commit
    • Timothy B. Terriberry's avatar
      Fix signed left-shifts added in e93acb2d. · 4e6a8f30
      Timothy B. Terriberry authored
      Since we now require C99, this is undefined behavior.
      Thanks to Luc Trudeau for the report and Alex Converse for the
      suggestion on how to make the macro safe for all integer sizes.
      
      Change-Id: I99a1342dfedb3e17a6869269be317c2ed26bfe9b
      4e6a8f30
  15. 24 Feb, 2017 1 commit
    • Luc Trudeau's avatar
      Add get_plane_type() helper function. · 005feb6b
      Luc Trudeau authored
      Adds the static inline function get_plane_type to convert a plane number
      to the corresponding PLANE_TYPE.
      
      There's no change to the bitstream, it only encapsulates the logic to
      get the PLANE_TYPE.
      
      Change-Id: I1199db3a32c89437d9c029ab5b2b2e62582a13a2
      005feb6b
  16. 23 Feb, 2017 1 commit
    • Jingning Han's avatar
      Add chroma 2x2 block experiment · 31b6a4f9
      Jingning Han authored
      Support the use of 2x2 prediction and transform block size for
      chroma components. This experiment builds on top of cb4x4. It
      brings back the loss in performance gains due to 4x4 chroma
      component constrain. The coding gains for lowres are up from 1.5%
      to 2.5%.
      
      Change-Id: I8e461e230c2d920f6df1af9d935ebe9dfa3820d9
      31b6a4f9
  17. 22 Feb, 2017 1 commit
    • Jingning Han's avatar
      Fix block encoding stage inter mode operation · ea576f3e
      Jingning Han authored
      Properly scale the chroma component block size to handle the sub8x8
      coding block in the encoding stage. It resolves the large performance
      drop issue in cb4x4 due to minimum 4x4 block size.
      
      Change-Id: Ia2477b43521408b72a20aca406f495faba66c033
      ea576f3e
  18. 18 Feb, 2017 1 commit
  19. 17 Feb, 2017 1 commit
    • Yushin Cho's avatar
      Remove PVQ_CHROMA_RD codes · 5c207296
      Yushin Cho authored
      Which was a workaround to balance the quality between
      luma and chroma when PVQ is enabled, by
      1) skipping PVQ DC RDO for chroma and
      2) using smaller lambda value (x0.5) for intra prediction of chroma,
      intended to spend more bits and thus improve quality for chroma.
      
      The change in metric for 5 frames of objective-1-fast is:
      PSNR  PSNR-HVS  SSIM  CIEDE-2000  PSNR Cb PSNR Cr  MS-SSIM
      -1.45 -1.54     -1.46 4.62        13.71   14.87     -1.47
      
      For still images (subset1)
      PSNR  PSNR-HVS  SSIM  CIEDE-2000  PSNR Cb PSNR Cr  MS-SSIM VMAF
      -1.52 -1.54     -1.60 2.56        11.92   12.17     -1.52  -1.66
      
      Change-Id: I31c4d7a7de2939f6004c112649f7303f0e944156
      5c207296
  20. 16 Feb, 2017 2 commits
  21. 13 Feb, 2017 1 commit
  22. 09 Feb, 2017 1 commit
  23. 07 Feb, 2017 1 commit
    • Timothy B. Terriberry's avatar
      Scale PVQ input to OD_COEFF_SHIFT resolution. · e93acb2d
      Timothy B. Terriberry authored
      This ensures we operate at the same precision that Daala uses, which matters
      when activity masking is enabled, because of the gain companding.
      
      Metrics from Patchset 4 (which had slightly incorrect rounding):
      
      With activity masking (5 frames only):
      av1_pvq_AM_ref_5f@2017-02-07T03:37:53.702Z -> av1_pvq_AM_derf_fix2_coeff_scaling_5f@2017-02-07T00:12:24.427Z
      
          PSNR |  PSNR Cb |  PSNR Cr | PSNR HVS |   SSIM | MS SSIM | CIEDE 2000
        0.6653 | -12.3177 | -12.1858 |   0.3350 | 4.1013 |  2.0964 |    -4.0539
      
      In particular for Netflix_Crosswalk_1920x1080_60fps_8bit_420_60f.y4m
       -5.0589 | -22.3077 | -21.2188 |  -7.0389 | -3.3715 |-5.7794 |   -13.1891
      
      I.e., it fixes the large regression with AM on this sequence, and
       substantially improves chroma (at a lesser cost to other metrics).
      
      Without activity masking (5 frames only):
      av1_pvq_ref_5f@2017-02-07T03:52:51.279Z -> av1_pvq_derf_fix2_coeff_scaling_5f@2017-02-07T00:12:48.873Z
      
          PSNR | PSNR Cb | PSNR Cr | PSNR HVS |   SSIM | MS SSIM | CIEDE 2000
        0.0989 | -0.0322 | -0.0464 |   0.1883 | 0.0795 |  0.0579 |     0.0923
      
      Change-Id: I46b808b7c8e4733465f8bebc8336dfd5b75783ec
      e93acb2d
  24. 26 Jan, 2017 1 commit
    • ltrudeau's avatar
      Convert PVQ skip variable to enum · e1c0929f
      ltrudeau authored
      Creates the PVQ_SKIP_TYPE enum to encapsulate the different types of
      skipping that can be signaled by PVQ (i.e. skip: AC, DC or both).
      
      There is no impact on the bitstream. However, the decoder will now emit
      an internal error if the decoded skip flag is out of range. The
      block_skip variable is also renamed to ac_dc_coded as it stores the same
      information.
      
      Change-Id: Ib2aadaf99dc1736ea392ae5ed8948c3cdc12da9b
      e1c0929f
  25. 24 Jan, 2017 1 commit
    • David Barker's avatar
      Make ext-inter use new rectangular intra predictor · 839467f4
      David Barker authored
      Now that https://aomedia-review.googlesource.com/#/c/6729/
      has been merged, build_intra_predictors_for_interintra() is
      now redundant, so replace it by a direct call to
      av1_predict_intra_block() and remove the old function.
      
      Reset rect_interintra back to 1.
      
      To do this, we need to make the intra predictor take a
      BLOCK_SIZE instead of a TX_SIZE. This is because we need to
      be able to predict 32x64 and 64x32 blocks, but there is no
      TX_32X64 or TX_64X32.
      
      No effect on output or performance.
      
      Change-Id: I8c185a211c97a85012cc54ec293c785a693608ed
      839467f4
  26. 23 Jan, 2017 1 commit
    • Yushin Cho's avatar
      Add a new experiment, DAALA_DIST · 7a428ba2
      Yushin Cho authored
      This commit adds a new experiment, Daala's distortion function,
      which is designed to better approximate perceptual distortion
      in 8x8 pixel blocks.
      
      This experiment is expected to work best with PVQ.
      
      It measures the variance of overlapped 4x4 regions in the 8x8 area,
      then uses these variances to scale the MSE of weighted frequency domain
      distortion of 8x8 block.
      
      Since AV1 calculates distortion in blocks as small as 4x4, it is not possible to
      directly replace the existing distortion functions of AV1,
      such as dist_block() and block_rd_txf().
      Hence, there has been substantial changes in order to apply
      Daala's 8x8 distortion function.
      The daala distortion function is applied
      after all 4x4 tx blocks in a 8x8 block are encoded (during RDO),
      as in below two cases:
      1) intra/inter sub8x8 predictions and
      2) 4x4 transform with prediction size >= 8.
      
      To enable this experiment, add '--enable-daala-dist' with configure.
      
      TODO: Significant tuning of parameters is required since the function has
      originally came from Daala thus most parameters would not work
      correctly outside Daala.
      The fact that chroma distortion is added to the distortion of AV1's RDO is
      also critical since Daala's distortion function is applied to luma only
      and chroma continues to use MSE.
      
      Change-Id: If35fdd3aec7efe401f351ba1c99891ad57a3d957
      7a428ba2
  27. 20 Jan, 2017 1 commit
    • ltrudeau's avatar
      Replace Skip with AC/DC coded in PVQ · 472f63f4
      ltrudeau authored
      Instead of returning skip, av1_pvq_encode_helper and od_pvq_encode now
      return ac_dc_coded. This gives more information on whether the DC part
      or the AC part was skipped.
      
      Although it is possible to obtain ac_dc_coded from the pvq_info struct,
      this struct is not always used, in which case the information was lost.
      
      This change does not impact the bitstream.
      
      Change-Id: Ie303de915f74e8da384f822332eb1aa27f677bd3
      472f63f4
  28. 18 Jan, 2017 1 commit
    • Urvang Joshi's avatar
      Enable rectangular transforms for Intra also. · feb925fe
      Urvang Joshi authored
      These are under EXT_TX + RECT_TX experiment combo.
      
      Results
      =======
      
      Derf Set:
      --------
      All Intra frames: 1.8% avg improvement (and 1.78% BD-rate improvement)
      Video: 0.230% avg improvement (and 0.262% BD-rate improvement)
      
      Objective-1-fast set
      --------------------
      Video: 0.52 PSNR improvement
      
      Change-Id: I1893465929858e38419f327752dc61c19b96b997
      feb925fe
  29. 06 Jan, 2017 2 commits
    • Jingning Han's avatar
      Rework the txfm partition context to support cb4x4 mode · 581d1697
      Jingning Han authored
      This commit reworks the transform block partition context update
      to support cb4x4 mode in the recursive transform block partition.
      It resolves the remaining enc/dec mismatch issue when both cb4x4
      and var-tx are turned on.
      
      Change-Id: I850d121204fe4c68e81488f1d2848c570d9d08b9
      581d1697
    • Jingning Han's avatar
      Refactor var-tx pipeline to support cb4x4 mode · 9ca05b7e
      Jingning Han authored
      Replace hard coded 4x4 transform block step size assumption with
      scalable table access.
      
      Change-Id: Ib1cc555c2641e5634acdd91ca33217f00aeb0b89
      9ca05b7e
  30. 05 Jan, 2017 2 commits
    • Nathan E. Egge's avatar
      Use aom_writer with generic_encode(). · 760c27f1
      Nathan E. Egge authored
      Change the generic_encode() function to take an aom_writer struct
       instead of an od_ec_enc struct.
      
      Change-Id: Icb447fe5ada27aba45fbaea08b28e9fe42c5a404
      760c27f1
    • Nathan E. Egge's avatar
      Replace od_ec_enc with aom_writer in daala_enc_ctx. · 6675be0a
      Nathan E. Egge authored
      Use the generic AOM entropy encoder in the daala_enc_ctx struct.
      This is done in preparation for migrating other entropy coder calls to
       use the more generic entropy coding API.
      
      Change-Id: Id627d12402a397bcb21d48d896c0de249d4d8657
      6675be0a
  31. 04 Jan, 2017 2 commits