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  1. 13 Jan, 2016 11 commits
    • Kieran Kunhya's avatar
      diracdec: Add slice threading to HQ profile · bfc8a4da
      Kieran Kunhya authored
      bfc8a4da
    • Claudio Freire's avatar
      AAC encoder: encode out-of-phase I/S efficiently · 699c2ee5
      Claudio Freire authored 
      Use the ability to invert phase with ms_mask instead of changing
the codebook when possible, to avoid having to switch codebooks
if some bands are INTENSTY_BT and others are INTENSITY_BT2, since
usually a set ms_mask uses less bits that a codebook change. While
it may not always be a win (ie: if it causes an ms_mask bitmap
to be sent when it wouldn't have been otherwise), it's unlikely
since the ms_mask bitmap will almost always be there already for
M/S itself.
      699c2ee5
    • Claudio Freire's avatar
      AAC encoder: fix I/S relative error evaluation · aa64a483
      Claudio Freire authored 
      The relative error between two encoding strategies is the simple
difference of rate-distortion values, and not the absolute
difference. An absolute measure would allow worsening of the
quantization error as well as improving.
      aa64a483
    • Claudio Freire's avatar
      AAC encoder: various fixes in M/S coding · 6711aa21
      Claudio Freire authored 
      1. Fix sf_idx and band_type addressing to address only the first
subwindow in the group (others could hold garbage values)

2. Don't step on ms_mask when is_mask is set. I/S selection
already sets the ms_mask properly and shouldn't be overridden.

3. Use mid/sid cb/sf when computing coding error, as should be
since those are the cb/sfs that will eventually be set.

4. Fix distortion computation on multi-subwindow groups (was
subtracting the bits terms multiple times)

5. Clear ms_mask when one side uses PNS and the other doesn't.
When using PNS, ms_mask signals correlated noise, which can be
detected just like regular M/S detection, so we don't skip
noise bands, but when only one side uses PNS setting the flag
can confuse some encoders, so avoid that.
      6711aa21
    • Claudio Freire's avatar
      AAC encoder: in IS, fix index of sf_idx, band_type · 4dcb69cc
      Claudio Freire authored 
      Correct addressing of sf_idx and band_type arrays in I/S code.

Both arrays don't guarantee valid values for subwindows at all
times, depending on which coder is being used, which could result
in reading of garbage values. Instead, only the first subwindow
in the window group has to be used, ie: use w*16+g instead of
(w+w2)*16+g
      4dcb69cc
    • Claudio Freire's avatar
      AAC encoder: don't apply MS on special bands · 509f1680
      Claudio Freire authored 
      Change the condition for application of the M/S transform to match
that of the decoder. Namely, that no special coding books must be
in use in either channel. While the condition ought to be
equivalent to the current one when the invariant of is_mask is
kept, matching the decoder's condition is safer and easier to
maintain.
      509f1680
    • Claudio Freire's avatar
      AAC encoder: avoid assertion failure on PNS · 00d481b2
      Claudio Freire authored 
      In rare corner cases it could still fail an assert on sf_diff due
to failure to update prev_sf in some code paths. Fix that case.
      00d481b2
    • Claudio Freire's avatar
      AAC encoder: fix assertion error with prediction · 2a31b076
      Claudio Freire authored 
      Fixes an assertion error reported in #2686 that happens when
using prediction (either explicitly or implicitly by setting
the AAC main profile), since prediction code would allow
creating new zeroes or removing existing ones, without
properly checking for SF delta violations.

This patch forbids creating/removing zeroes, perhaps an
overly conservative approach, but a safe one. More permissive
and sophisticated approaches may be attempted in the future.
      2a31b076
    • Carl Eugen Hoyos's avatar
      lavc/mjpeg2jpeg: Accept more mjpeg streams as input. · d3fe2e0d
      Carl Eugen Hoyos authored 
      Fixes ticket #5151.
      d3fe2e0d
    • Michael Niedermayer's avatar
      avutil/common: Protect GET_BYTE in GET_UTF8() by () · 9ca64c31
      Michael Niedermayer authored 
      Signed-off-by: 's avatarMichael Niedermayer <michael@niedermayer.cc>
      9ca64c31
    • Michael Niedermayer's avatar
      avformat/aviobuf: Fix end check in put_str16() · 115fb6d0
      Michael Niedermayer authored 
      Fixes out of array read
Fixes: 03c406ec9530e594a074ce2979f8a1f0/asan_heap-oob_7dec26_4664_37c52495b2870a2eaac65f53958e76c1.flac

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: 's avatarMichael Niedermayer <michael@niedermayer.cc>
      115fb6d0
  3. 12 Jan, 2016 12 commits
  5. 11 Jan, 2016 10 commits
  7. 10 Jan, 2016 7 commits