Only one audio stream is allowed in aiff.

The new commits improve the quality.
Signed-off-by: Rostislav Pehlivanov <atomnuker@gmail.com>

This commit improves the TNS implementation to the point where it's
actually usable and very rarely results in nastyness (in all bitrates
except extremely low bitrates it's increasing the quality and prevents
some distortions from the coder being audiable).

Also adds a double filter support which is only used if the energy
difference between the top and bottom of the SFBs is above the
thresholds defined in the header file. Looking at the bitstream
that fdk_aac generates it sometimes used a double filter despite
the specs stating that a single filter should be enough for almost
all cases and purposes.

Unlike FAAC or fdk_aac we sometimes use a reverse filter in case
the energy difference isn't enought to use a double filter. This
actually works better.
Signed-off-by: Rostislav Pehlivanov <atomnuker@gmail.com>

Signed-off-by: Rostislav Pehlivanov <atomnuker@gmail.com>

This commit adds a flag to use the pure coefficients instead
of the processed ones (sce->coeffs). This is needed because
IS will apply the changes to the coefficients immediately
before the adjust_common_prediction function and it doesn't
make sense to measure stereo channel coefficient difference
when one of the channels coefficients are all zero.

Therefore add a flag to use pure coefficients in that case.
TNS is the only thing touching the coefficients before IS
so common window prediction will not take that into account
but the effect of the TNS filter per coefficient can be small
(a few percent) so to some approximation it's fine to just
ignore that.

Also fixed a small error which doesn't alter the results
that much. pow(sqrt(number), 3.0/4.0) == pow(number, 3.0/8.0) !=
pow(number, 3.0/4.0).
Signed-off-by: Rostislav Pehlivanov <atomnuker@gmail.com>

"Fixes" CID1322361
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

Fixes CID1322304, CID1322305
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

Signed-off-by: Carl Eugen Hoyos <cehoyos@ag.or.at>

Signed-off-by: Carl Eugen Hoyos <cehoyos@ag.or.at>

Signed-off-by: Carl Eugen Hoyos <cehoyos@ag.or.at>

+added gamma conversion to refactored code

Fixes decoding for the sample from ticket #4820.

The encoder produces valid and - if requested - lossless files.

Signed-off-by: Paul B Mahol <onemda@gmail.com>

Signed-off-by: Paul B Mahol <onemda@gmail.com>

Signed-off-by: Paul B Mahol <onemda@gmail.com>

Signed-off-by: Paul B Mahol <onemda@gmail.com>

Signed-off-by: Paul B Mahol <onemda@gmail.com>

The fate results change because we now correctly timestamp the pskip
frames, which means the results are now identical to -vsync 0.

Instead, use segmentation.enabled before accessing each of these values.

This makes values consistent with libvpx.

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

Fixes CID1322351
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

Fixes CID1322315
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

Fixes CID1322317
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

stream copy always has a input stream, it cannot use complex video/audio filters with unambigous input
Fixes CID1322348
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

Fixes: CID1322322
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>