Based on a patch by Clément Bœsch <u@pkh.me>.
Signed-off-by: Timothy Gu <timothygu99@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Fixes Ticket3761
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'acf91215':
  x86: dsputil: Avoid pointless CONFIG_ENCODERS indirection

Conflicts:
	libavcodec/x86/dsputil_init.c
	libavcodec/x86/dsputilenc_mmx.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'a8552ee3':
  ppc: dsputil: Coalesce all init files

Conflicts:
	libavcodec/ppc/dsputil_altivec.h
	libavcodec/ppc/dsputil_ppc.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Lukasz Marek <lukasz.m.luki2@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

ubitux maintains them. It seems it was forgotten to update MAINTAINERs though

See: Re: [FFmpeg-devel] [PATCH] MAINTAINERS: add Subtitle maintainer
     Message-ID: <20140713120546.GC26262@leki>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Reviewed-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

The remaining dsputil bits are encoding-specific anyway.

The previous implementation targeted DTS Coherent Acoustics, which only
requires mdct_bits == 6. This relatively small size lent itself to
unrolling the loops a small number of times, and encoding offsets
calculated at assembly time within the load/store instructions of each
iteration.

In the more general case (codecs such as AAC and AC3) much larger arrays
are used - mdct_bits == [8, 9, 11]. The old method does not scale for
these cases, so more integer registers are used with non-unrolled versions
of the loops (and with some stack spillage). The postrotation filter loop
is still unrolled by a factor of 2 to permit the double-buffering of some
VFP registers to facilitate overlap of neighbouring iterations.

I benchmarked the result by measuring the number of gperftools samples
that hit anywhere in the AAC decoder (starting from aac_decode_frame())
or specifically in ff_imdct_half_c / ff_imdct_half_vfp, for the same
example AAC stream:

                  Before          After
                  Mean   StdDev   Mean   StdDev  Confidence  Change
aac_decode_frame  2368.1 35.8     2117.2 35.3    100.0%      +11.8%
ff_imdct_half_*   457.5  22.4     251.2  16.2    100.0%      +82.1%
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: James Almer <jamrial@gmail.com>
Reviewed-by: Kieran Kunhya <kierank@obe.tv>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Fixes http://forum.doom9.org/showthread.php?t=170867.
Fixes: corrupt-1677.mkv
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

might fix ticket 3410
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Should fix Ticket3328
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Fixes long loop
Fixes Ticket3208
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Was requested in review
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

These are part of the hardening flags used by Debian.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Reviewed-by: Timothy Gu <timothygu99@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Fixes Ticket 3763
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Fixes leaving a pointer to unreferenced memory
Fixes Ticket 3115
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Found-by: Hendrik Leppkes <h.leppkes@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Fixes part of Ticket2516 with ffplay
Reviewed-by: Marton Balint <cus@passwd.hu>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: James Almer <jamrial@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

fixes integer overflow
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Lukasz Marek <lukasz.m.luki2@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Fixes part of Ticket2516
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

* commit '6cc1409b':
  examples/output: Remove unused variable

See: 9b211c43Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '11733202':
  dsputil: Drop unused bit_depth parameter from all init functions

Conflicts:
	libavcodec/dsputil.c
	libavcodec/dsputil.h
	libavcodec/ppc/dsputil_ppc.c
	libavcodec/x86/dsputilenc_mmx.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>

doc/examples/output.c:460:9: warning: unused variable ‘i’

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

Fixes Ticket2441
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>