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  1. 13 Feb, 2020 4 commits
    • Lynne's avatar
      lavu/tx: implement 32 bit fixed point FFT and MDCT · e8f054b0
      Lynne authored 
      Required minimal changes to the code so made sense to implement.
FFT and MDCT tested, the output of both was properly rounded.
Fun fact: the non-power-of-two fixed-point FFT and MDCT are the fastest ever
non-power-of-two fixed-point FFT and MDCT written.
This can replace the power of two integer MDCTs in aac and ac3 if the
MIPS optimizations are ported across.
Unfortunately the ac3 encoder uses a 16-bit fixed point forward transform,
unlike the encoder which uses a 32bit inverse transform, so some modifications
might be required there.

The 3-point FFT is somewhat less accurate than it otherwise could be,
having minor rounding errors with bigger transforms. However, this
could be improved later, and the way its currently written is the way one
would write assembly for it.
Similar rounding errors can also be found throughout the power of two FFTs
as well, though those are more difficult to correct.
Despite this, the integer transforms are more than accurate enough.
      e8f054b0
    • Paul B Mahol's avatar
      avcodec/midivid: only multiple of 4 width/height are possible · e007059d
      Paul B Mahol authored
      e007059d
    • Paul B Mahol's avatar
      avcodec/midivid: improve decoding of widths not multiple of 32 · 388a221a
      Paul B Mahol authored
      388a221a
    • Andriy Gelman's avatar
      avcodec/h264_ps: Return error if pps has FMO parameters · 018a4279
      Andriy Gelman authored 
      FMO is not supported and fields related to FMO are not parsed, meaning
that any fields which follow will be corrupt.
Signed-off-by: 's avatarJames Almer <jamrial@gmail.com>
      018a4279
  3. 12 Feb, 2020 7 commits
  5. 11 Feb, 2020 7 commits
  7. 10 Feb, 2020 9 commits
  9. 09 Feb, 2020 13 commits