1. 09 Mar, 2013 1 commit
    • Deb Mukherjee's avatar
      Continued experiment with nonzero count · a28139c8
      Deb Mukherjee authored
      Adds probability updates for extra bits for the nzcs, code for
      getting nzc stats, plus some minor cleanups and fixes.
      
      Change-Id: If2814e7f04fb52f5025ad9f400f3e6c50a00b543
      a28139c8
  2. 08 Mar, 2013 2 commits
    • Jingning Han's avatar
      Extend diff MV limit from +/-256 to +/-1024 · 2a5278bd
      Jingning Han authored
      Increase the motion search range by 4x. Change MV_CLASS tree of the
      entropy coding to allow two additional mv classes to cover the
      extended motion vector limit. The codec determines the effective
      motion search range conditioned on the actual frame dimension.
      
      It provides coding gains:
      
      stdhd 0.39%
      yt    0.56%
      hd    0.47%
      
      Major coding performance gains are packed in several sequences with
      intense motion activities, e.g., ped_1080p gains 7% at high bit-rates,
      and on average 3%.
      
      TODO: Need to further tune the rate control and motion search units.
      
      Change-Id: Ib842540a6796fbee5a797809433ef6a477c6d78d
      2a5278bd
    • Ronald S. Bultje's avatar
      Add support for tx_select in i8x8 encoding in keyframes. · b41dee84
      Ronald S. Bultje authored
      Also enable tx_select for keyframes.
      
      Change-Id: Iadb1231d9fa7af0c8dce3d9b41830b93a302479e
      b41dee84
  3. 07 Mar, 2013 2 commits
    • Ronald S. Bultje's avatar
      Re-add support for ADST in superblocks. · d3724abe
      Ronald S. Bultje authored
      This also changes the RD search to take account of the correct block
      index when searching (this is required for ADST positioning to work
      correctly in combination with tx_select).
      
      Change-Id: Ie50d05b3a024a64ecd0b376887aa38ac5f7b6af6
      d3724abe
    • Deb Mukherjee's avatar
      Coding con-zero count rather than EOB for coeffs · eb6ef241
      Deb Mukherjee authored
      This patch revamps the entropy coding of coefficients to code first
      a non-zero count per coded block and correspondingly remove the EOB
      token from the token set.
      
      STATUS:
      Main encode/decode code achieving encode/decode sync - done.
      Forward and backward probability updates to the nzcs - done.
      Rd costing updates for nzcs - done.
      Note: The dynamic progrmaming apporach used in trellis quantization
      is not exactly compatible with nzcs. A suboptimal approach has been
      used instead where branch costs are updated to account for changes
      in the nzcs.
      
      TODO:
      Training the default probs/counts for nzcs
      
      Change-Id: I951bc1e22f47885077a7453a09b0493daa77883d
      eb6ef241
  4. 05 Mar, 2013 1 commit
    • Ronald S. Bultje's avatar
      Make superblocks independent of macroblock code and data. · 111ca421
      Ronald S. Bultje authored
      Split macroblock and superblock tokenization and detokenization
      functions and coefficient-related data structs so that the bitstream
      layout and related code of superblock coefficients looks less like it's
      a hack to fit macroblocks in superblocks.
      
      In addition, unify chroma transform size selection from luma transform
      size (i.e. always use the same size, as long as it fits the predictor);
      in practice, this means 32x32 and 64x64 superblocks using the 16x16 luma
      transform will now use the 16x16 (instead of the 8x8) chroma transform,
      and 64x64 superblocks using the 32x32 luma transform will now use the
      32x32 (instead of the 16x16) chroma transform.
      
      Lastly, add a trellis optimize function for 32x32 transform blocks.
      
      HD gains about 0.3%, STDHD about 0.15% and derf about 0.1%. There's
      a few negative points here and there that I might want to analyze
      a little closer.
      
      Change-Id: Ibad7c3ddfe1acfc52771dfc27c03e9783e054430
      111ca421
  5. 02 Mar, 2013 1 commit
    • Dmitry Kovalev's avatar
      Code cleanup. · 135428e9
      Dmitry Kovalev authored
      Removing redundant 'extern' keyword, lowercase variable names.
      
      Change-Id: I608e8d8579aba8981f5fac3493f77b4481b13808
      135428e9
  6. 27 Feb, 2013 4 commits
    • Ronald S. Bultje's avatar
      Move eob from BLOCKD to MACROBLOCKD. · e8c74e2b
      Ronald S. Bultje authored
      Consistent with VP8.
      
      Change-Id: I8c316ee49f072e15abbb033a80e9c36617891f07
      e8c74e2b
    • John Koleszar's avatar
      Use ref_frame_map vice active_ref_idx on the encoder · 800ad0b8
      John Koleszar authored
      This patch makes the encoder's use of ref_frame_map and active_ref_idx
      consistent with the decoder. ref_frame_map[] maps a reference buffer
      index to its actual location in the yv12_fb array, since many
      references may share an underlying buffer. active_ref_idx[] mirrors
      cpi->{lst,gld,alt}_fb_idx, holding the active references in each
      slot.
      
      This also fixes a bug in setup_buffer_inter() where the incorrect
      reference was used to populate the scaling factors.
      
      Change-Id: Id3728f6d77cffcd27c248903bf51f9c3e594287e
      800ad0b8
    • John Koleszar's avatar
      Combined motion compensation with scaled predictors · 77f88e97
      John Koleszar authored
      This patch extends the previous support for using references of a
      different resolution in ZEROMV mode to all inter prediction modes.
      Subpixel based best-mv scoring is disabled when the reference frame
      differs in resolution from the current frame.
      
      Change-Id: Id4dc3e5e6692de98d9857fd56bfad3ac57e944ac
      77f88e97
    • John Koleszar's avatar
      Spatial resamping of ZEROMV predictors · eb939f45
      John Koleszar authored
      This patch allows coding frames using references of different
      resolution, in ZEROMV mode. For compound prediction, either
      reference may be scaled.
      
      To test, I use the resize_test and enable WRITE_RECON_BUFFER
      in vp9_onyxd_if.c. It's also useful to apply this patch to
      test/i420_video_source.h:
      
        --- a/test/i420_video_source.h
        +++ b/test/i420_video_source.h
        @@ -93,6 +93,7 @@ class I420VideoSource : public VideoSource {
      
           virtual void FillFrame() {
             // Read a frame from input_file.
        +    if (frame_ != 3)
             if (fread(img_->img_data, raw_sz_, 1, input_file_) == 0) {
               limit_ = frame_;
             }
      
      This forces the frame that the resolution changes on to be coded
      with no motion, only scaling, and improves the quality of the
      result.
      
      Change-Id: I1ee75d19a437ff801192f767fd02a36bcbd1d496
      eb939f45
  7. 26 Feb, 2013 5 commits
  8. 25 Feb, 2013 1 commit
    • Jingning Han's avatar
      clean up forward and inverse hybrid transform · 77a3becf
      Jingning Han authored
      Rebased.
      
      Remove the old matrix multiplication transform computation. The 16x16
      ADST/DCT can be switched on/off and evaluated by setting ACTIVE_HT16
      300/0 in vp9/common/vp9_blockd.h.
      
      Change-Id: Icab2dbd18538987e1dc4e88c45abfc4cfc6e133f
      77a3becf
  9. 23 Feb, 2013 2 commits
    • Ronald S. Bultje's avatar
      Split coefficient token tables intra vs. inter. · 0c9e2e9a
      Ronald S. Bultje authored
      Change-Id: I5416455f8f129ca0f450d00e48358d2012605072
      0c9e2e9a
    • Paul Wilkins's avatar
      Further changes to coefficient contexts. · c17672a3
      Paul Wilkins authored
      This patch alters the balance of context between the
      coefficient bands (reflecting the position of coefficients
      within a transform blocks) and the energy of the previous
      token (or tokens) within a block.
      
      In this case the number of coefficient bands is reduced
      but more previous token energy bands are supported.
      
      Some initial rebalancing of the default tables has been
      by running multiple derf clips at multiple data rates using
      the ENTOPY_STATS macro. Further balancing needs to be
      done using larger image formatsd especially in regard to
      the bigger transform sizes which are not as well represented
      in encodings of smaller image formats.
      
      Change-Id: If9736e95c391e711b04aef6393d26f60f36e1f8a
      c17672a3
  10. 22 Feb, 2013 2 commits
    • Paul Wilkins's avatar
      Experimental removal of over quant code · dbf49420
      Paul Wilkins authored
      The over quant code was added in VP8 post
      bitstream freeze to allow compression to lower
      data rates
      
      In VP9 the real qualtizer range has been greatly
      extended anyway.
      
      Change-Id: I5d384fa5e9a83ef75a3df34ee30627bd21901526
      dbf49420
    • Jingning Han's avatar
      Forward butterfly hybrid transform · babbd5d1
      Jingning Han authored
      This patch includes 4x4, 8x8, and 16x16 forward butterfly ADST/DCT
      hybrid transform. The kernel of 4x4 ADST is sin((2k+1)*(n+1)/(2N+1)).
      The kernel of 8x8/16x16 ADST is of the form sin((2k+1)*(2n+1)/4N).
      
      Change-Id: I8f1ab3843ce32eb287ab766f92e0611e1c5cb4c1
      babbd5d1
  11. 21 Feb, 2013 1 commit
    • Deb Mukherjee's avatar
      Refactoring of switchable filter search for speed · 28b1db92
      Deb Mukherjee authored
      Refactors the switchable filter search in the rd loop to
      improve encode speed.
      
      Uses a piecewise approximation to a closed form expression to estimate
      rd cost for a Laplacian source with a given variance and quantization
      step-size.
      
      About 40% encode time reduction is achieved.
      
      Results (on a feb 12 baseline) show a slight drop:
      
      derf: -0.019%
      yt: +0.010%
      std-hd: -0.162%
      hd: -0.050%
      
      Change-Id: Ie861badf5bba1e3b1052e29a0ef1b7e256edbcd0
      28b1db92
  12. 16 Feb, 2013 2 commits
    • Ronald S. Bultje's avatar
      Minor cosmetic cleanups. · aa84c16d
      Ronald S. Bultje authored
      Change-Id: I13d8ae754827368755575dd699a087b3b11f5b16
      aa84c16d
    • Ronald S. Bultje's avatar
      Prevent filling transform size cache with uninitialized values. · ebfdaa0e
      Ronald S. Bultje authored
      The 32x32 value in case of splitmv was uninitialized. this leads to
      all kind of erratic behaviour down the line. Also fill in dummy values
      for superblocks in keyframes (the values are currently unused, but we
      run into integer overflows anyway, which makes detecting bad cases
      harder). Lastly, in case we did not find any RD value at all, don't
      set tx_diff to INT_MIN, but instead set it to zero (since if we couldn't
      find a mode, it's unlikely that any particular transform would have made
      that worse or better; rather, it's likely equally bad for all tx_sizes).
      
      Change-Id: If236fd3aa2037e5b398d03f3b1978fbbc5ce740e
      ebfdaa0e
  13. 15 Feb, 2013 3 commits
  14. 14 Feb, 2013 1 commit
  15. 13 Feb, 2013 6 commits
    • Paul Wilkins's avatar
      Abstract selection of coef band. · 9255ad10
      Paul Wilkins authored
      This patch abstracts the selection of the coefficient band
      context into a function as a precursor to further experiments
      with the coefficient context.
      
      It also removes the large per TX size coefficient band structures
      and uses a single matrix for all block sizes within the test function.
      
      This may have an impact on quality (results to follow) but is only an
      intermediate step in the process of redefining the context. Also the
      quality impact will be larger initially because the default tables will
      be out of step with the new banding.
      
      In particular the 4x4 will in this case only use 7 bands. If needed we
      can add back block size dependency localized within the function, but
      this can follow on after the other changes to the definition of the
      context.
      
      Change-Id: Id7009c2f4f9bb1d02b861af85fd8223d4285bde5
      9255ad10
    • Paul Wilkins's avatar
      Abstract the selection of coefficient context. · 0d284ffe
      Paul Wilkins authored
      This is an initial step to facilitate experimentation
      with changes to the prior token context used to code
      coefficients to take better account of the energy of
      preceding tokens.
      
      This patch merely abstracts the selection of context into
      two functions and does not alter the output.
      
      Change-Id: I117fff0b49c61da83aed641e36620442f86def86
      0d284ffe
    • Yaowu Xu's avatar
      enable bitstream lossless support · 17db5d00
      Yaowu Xu authored
      1. Added a bit in frame header to  to indicate if a frame is encoded
      in lossless mode, so decoder does not make the decision based on Q0
      2. Minor changes to make sure that lossy coding works same as when
      the lossless experiment is not enabled.
      3. Renamed function pointers for transforms to be consistent, using
      prefix fwd_txm and inv_txm for forward and inverse respectively
      
      To encode in lossless mode, using "--lossless=1 --min-q=0 --max-q=0"
      with vpxenc.
      
      Change-Id: Ifae53b26d2ffbe378d707e29d96817b8a5e6c068
      17db5d00
    • Yaowu Xu's avatar
      fix the lossless experiment · 16f25f9d
      Yaowu Xu authored
      Change-Id: I95acfc1417634b52d344586ab97f0abaa9a4b256
      16f25f9d
    • Paul Wilkins's avatar
      Remove NEWCOEFCONTEXT experiment. · 6a9f0c61
      Paul Wilkins authored
      Removal of the  NEWCOEFCONTEXT experiment to
      reduce code clutter and make it easier to experiment with
      some other changes to the coefficient coding context.
      
      Change-Id: Icd17b421384c354df6117cc714747647c5eb7e98
      6a9f0c61
    • Paul Wilkins's avatar
      Removal of Hybrid DWT/DCT experiment. · 649be94c
      Paul Wilkins authored
      Removal of experiment to simplify code base for other
      changes.
      
      Change-Id: If0a33952504558511926ad212bc311fc2bffb19a
      649be94c
  16. 11 Feb, 2013 1 commit
    • Jingning Han's avatar
      butterfly inverse 4x4 ADST · 57e995ff
      Jingning Han authored
      fixed format issues.
      
      Implement the inverse 4x4 ADST using 9 multiplications. For this
      particular dimension, the original ADST transform can be
      factorized into simpler operations, hence is retained.
      
      Change-Id: Ie5d9749942468df299ab74e90d92cd899569e960
      57e995ff
  17. 09 Feb, 2013 2 commits
    • John Koleszar's avatar
      Replace as_mv struct with array · 7ca517f7
      John Koleszar authored
      Replace as_mv.{first, second} with a two element array, so that they
      can easily be processed with an index variable.
      
      Change-Id: I1e429155544d2a94a5b72a5b467c53d8b8728190
      7ca517f7
    • Ronald S. Bultje's avatar
      Make cost_coeffs() more efficient. · 639b863d
      Ronald S. Bultje authored
      Cache the constant offset in one variable to prevent re-loading that
      in each loop iteration, and mark the function as inline so we can use
      the fact that the transform size is always known in the caller.
      
      Almost 1% faster encoding overall.
      
      Change-Id: Id78325a60b025057d8f4ecd9003a74086ccbf85a
      639b863d
  18. 08 Feb, 2013 2 commits
    • John Koleszar's avatar
      Pass macroblock index to pick inter functions · 6125a1ed
      John Koleszar authored
      Pass the current mb row and column around rather than the
      recon_yoffset and recon_uvoffset, since those offsets will
      change from predictor to predictor, based on the reference
      frame selection.
      
      Change-Id: If3f9df059e00f5048ca729d3d083ff428e1859c1
      6125a1ed
    • John Koleszar's avatar
      Initial support for resolution changes on P-frames · 393b4856
      John Koleszar authored
      Allows inter-frames to change resolution. Currently these are
      almost equivalent to keyframes, as only intra prediction modes
      are allowed, but without the other context resets that occur on
      keyframes.
      
      Change-Id: Icd1a2a5af0d9462cc792588427b0a1f5b12e40d3
      393b4856
  19. 07 Feb, 2013 1 commit