1. 08 Dec, 2012 2 commits
    • Ronald S. Bultje's avatar
      Clean up 4x4 coefficient decoding code. · fbf052df
      Ronald S. Bultje authored
      Don't use vp9_decode_coefs_4x4() for 2nd order DC or luma blocks. The
      code introduces some overhead which is unnecessary for these cases.
      Also, remove variable declarations that are only used once, remove
      magic offsets into the coefficient buffer (use xd->block[i].qcoeff
      instead of xd->qcoeff + magic_offset), and fix a few Google Style
      Guide violations.
      
      Change-Id: I0ae653fd80ca7f1e4bccd87ecef95ddfff8f28b4
      fbf052df
    • Ronald S. Bultje's avatar
      Introduce vp9_coeff_probs/counts/stats/accum types. · 885cf816
      Ronald S. Bultje authored
      Use these, instead of the 4/5-dimensional arrays, to hold statistics,
      counts, accumulations and probabilities for coefficient tokens. This
      commit also re-allows ENTROPY_STATS to compile.
      
      Change-Id: If441ffac936f52a3af91d8f2922ea8a0ceabdaa5
      885cf816
  2. 07 Dec, 2012 1 commit
    • Ronald S. Bultje's avatar
      32x32 transform for superblocks. · c456b35f
      Ronald S. Bultje authored
      This adds Debargha's DCT/DWT hybrid and a regular 32x32 DCT, and adds
      code all over the place to wrap that in the bitstream/encoder/decoder/RD.
      
      Some implementation notes (these probably need careful review):
      - token range is extended by 1 bit, since the value range out of this
        transform is [-16384,16383].
      - the coefficients coming out of the FDCT are manually scaled back by
        1 bit, or else they won't fit in int16_t (they are 17 bits). Because
        of this, the RD error scoring does not right-shift the MSE score by
        two (unlike for 4x4/8x8/16x16).
      - to compensate for this loss in precision, the quantizer is halved
        also. This is currently a little hacky.
      - FDCT and IDCT is double-only right now. Needs a fixed-point impl.
      - There are no default probabilities for the 32x32 transform yet; I'm
        simply using the 16x16 luma ones. A future commit will add newly
        generated probabilities for all transforms.
      - No ADST version. I don't think we'll add one for this level; if an
        ADST is desired, transform-size selection can scale back to 16x16
        or lower, and use an ADST at that level.
      
      Additional notes specific to Debargha's DWT/DCT hybrid:
      - coefficient scale is different for the top/left 16x16 (DCT-over-DWT)
        block than for the rest (DWT pixel differences) of the block. Therefore,
        RD error scoring isn't easily scalable between coefficient and pixel
        domain. Thus, unfortunately, we need to compute the RD distortion in
        the pixel domain until we figure out how to scale these appropriately.
      
      Change-Id: I00386f20f35d7fabb19aba94c8162f8aee64ef2b
      c456b35f
  3. 06 Dec, 2012 3 commits
  4. 05 Dec, 2012 8 commits
  5. 04 Dec, 2012 4 commits
  6. 03 Dec, 2012 11 commits
  7. 01 Dec, 2012 1 commit
  8. 30 Nov, 2012 5 commits
  9. 29 Nov, 2012 5 commits