1. 23 Feb, 2013 2 commits
    • 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
    • Yaowu Xu's avatar
      optimize 8x8 fdct rounding for accuracy · 22012ee9
      Yaowu Xu authored
      The commit added a final rounding choice for 8x8 forward dct to get
      rid of a sign bias at DC position and improve the accuracry in term
      of round trip error for 8x8 fDCT/iDCT.
      
      This commit also enabled forward 8x8 dct test.
      
      Change-Id: Ib67f99b0a24d513e230c7812bc04569d472fdc50
      22012ee9
  2. 22 Feb, 2013 3 commits
    • Dmitry Kovalev's avatar
      Code cleanup. · 548b4dd5
      Dmitry Kovalev authored
      Removing redundant 'extern' keywords and parentheses, fixing indentation,
      making variable names lower case, using short expressions x *= c
      instead of x = x * c, minor code simplifications.
      
      Change-Id: If6a25fcf306d1db26e90d27e3c24a32735c607de
      548b4dd5
    • 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
  3. 21 Feb, 2013 3 commits
    • Dmitry Kovalev's avatar
      Code cleanup. · 5a18106f
      Dmitry Kovalev authored
      Removing redundant 'extern' keywords. Moving VP9DX_BOOL_DECODER from .h
      to .c file.
      
      Change-Id: I5a3056cb3d33db7ed3c3f4629675aa8e21014e66
      5a18106f
    • Dmitry Kovalev's avatar
      Code cleanup. · 5da85349
      Dmitry Kovalev authored
      Removing redundant 'extern' keyword from function declarations and making
      function arguments lower case.
      
      Change-Id: Idae9a2183b067f2b6c85ad84738d275e8bbff9d9
      5da85349
    • 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
  4. 20 Feb, 2013 3 commits
    • Jingning Han's avatar
      Fixed the buffer overflow issue · 232ccc2f
      Jingning Han authored
      The issue that potentially broke the encoding process was due to the fact
      that the length of token link is calculated from the total number of tokens
      coded, while it is possible, in high bit-rate setting, this length is
      greater than the buffer length initially assigned to the cpi->tok.
      
      This patch increases the initially allocated buffer length assigned to
      cpi->tok from
      (mb_rows * mb_cols * 24 * 16) to (mb_rows * mb_cols * (1 + 24 * 16)).
      
      It resolves the buffer overflow problem.
      
      Change-Id: I8661a8d39ea0a3c24303e3f71a170787a1d5b1df
      232ccc2f
    • Yaowu Xu's avatar
      Merge lossless experiment · d262e26c
      Yaowu Xu authored
      Change-Id: I7b7b8d4fda3a23699e0c920d727f8c15d37d43aa
      d262e26c
    • Paul Wilkins's avatar
      Entropy stats output code. · ef01b956
      Paul Wilkins authored
      Fixes to make Entropy stats code work again
      
      Change-Id: I62e380481a4eb4c170076ac6ab36f0c2b203e914
      ef01b956
  5. 19 Feb, 2013 1 commit
    • Yaowu Xu's avatar
      Use lossless for Q0 · 93d6b86c
      Yaowu Xu authored
      The commit changes the coding mode to lossless whenever the lowest
      quantizer is choosen.
      
      As expected, test results showed no difference for cif and std-hd
      set where Q0 is rarely used. For yt and yt-hd set, Q0 is used for
      a number of clips, where this commit helped a lot in the high end.
      
      Average over all clips in the sets:
      yt: 2.391% 1.017% 1.066%
      hd: 1.937%  .764%  .787%
      
      Change-Id: I9fa9df8646fd70cb09ffe9e4202b86b67da16765
      93d6b86c
  6. 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
  7. 15 Feb, 2013 4 commits
  8. 14 Feb, 2013 2 commits
  9. 13 Feb, 2013 8 commits
    • Ronald S. Bultje's avatar
      Add support for tile rows. · 89a206ef
      Ronald S. Bultje authored
      These allow sending partial bitstream packets over the network before
      encoding a complete frame is completed, thus lowering end-to-end
      latency. The tile-rows are not independent.
      
      Change-Id: I99986595cbcbff9153e2a14f49b4aa7dee4768e2
      89a206ef
    • 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
      Fixed encoder decoder mismatch. · 56049d94
      Paul Wilkins authored
      Reverted part of change
      I19981d1ef0b33e4e5732739574f367fe82771a84
      
      That gives rise to an enc/dec mismatch.
      As things stand the memsets are still needed.
      
      Change-Id: I9fa076a703909aa0c4da0059ac6ae19aa530db30
      56049d94
    • 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
  10. 12 Feb, 2013 3 commits
  11. 11 Feb, 2013 2 commits
    • 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
    • Paul Wilkins's avatar
      Change rd thresholds and add speed trade off flags. · aec5bed3
      Paul Wilkins authored
      Experimental tweaks to various thresholds to measure
      quality / speed trade off.
      
      Add flag that allows static segmentation to be turned off
      and disables it unless in the second pass of a two pass
      encode.
      
      Change-Id: I219702ffe858412a83db801cbbbd869924b8c61b
      aec5bed3
  12. 09 Feb, 2013 4 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
      Port sadNxNx4d functions to x86inc.asm. · c0ce2ab3
      Ronald S. Bultje authored
      Change-Id: Ic639f5742f7a007753d7a3fa5c66235172eb31d8
      c0ce2ab3
    • Ronald S. Bultje's avatar
      Add sad64x64 and sad32x32 SSE2 versions. · 02ff360b
      Ronald S. Bultje authored
      Also port the 4x4, 16x16, 8x16 and 16x8 versions to x86inc.asm; this
      makes them all slightly faster, particularly on x86-64. Remove SSE3
      sad16x16 version, since the SSE2 version is now faster.
      
      About 1.5% overall encoding speedup.
      
      Change-Id: Id4011a78cce7839f554b301d0800d5ca021af797
      02ff360b
    • 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
  13. 08 Feb, 2013 3 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
    • John Koleszar's avatar
      Avoid allocating memory when resizing frames · c03d45de
      John Koleszar authored
      As long as the new frame is smaller than the size that was originally
      allocated, we don't need to free and reallocate the memory allocated.
      Instead, do the allocation on the size of the first frame. We could
      make this passed in from the application instead, if we wanted to
      support external upscaling.
      
      Change-Id: I204d17a130728bbd91155bb4bd863a99bb99b038
      c03d45de