The header parser uses forward and backward parsing, making the
bulletproof prevention of loops difficult, thus this simple
detection code.
If someone improves the forward/backward parsing so it cannot loop
then this commit should be reverted

Fixes Ticket3278
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Fixes ticket #3261 visually.

Analyzed-by: Michael Doilnitsyn

Add two examples on the usage of the equalizer filter.

Fixes use of uninitialized memory
Fixes: msan_uninit-mem_7fcecee73d71_6470_luckynight-partial.tak
Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Fixes use of uninitialized memory
Partly fixes; msan_uninit-mem_7fb7d24780d0_2744_R03T.CAK
Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Fixes use of uninitialized memory
Partly fixes; msan_uninit-mem_7fb7d24780d0_2744_R03T.CAK
Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Fixes use of uninitialized memory
Fixes: msan_uninit-mem_7f6e13c220d0_8489_short.flac
Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

* qatar/master:
  network.h: Add #endif comments to improve readability
Merged-by: Michael Niedermayer <michaelni@gmx.at>

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

* commit '794fcf79':
  Rename CONFIG_FFT_FLOAT ---> FFT_FLOAT

Conflicts:
	libavcodec/fft-internal.h
	libavcodec/fft-test.c
	libavcodec/fft_fixed.c
	libavcodec/fft_float.c
	libavcodec/fft_template.c
	libavcodec/mdct_fixed.c
	libavcodec/mdct_float.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>

Fixes use of uninitialized memory
Fixes: msan_uninit-mem_7f49667d83db_3396_WebVTT_capability_tester.vtt
Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Fixes use of uninitialized memory with vlc (sample from ticket3277)
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

* qatar/master:
  libopusenc: Change default frame duration to 20 ms

See: 74906d37Merged-by: Michael Niedermayer <michaelni@gmx.at>

Fixes use of uninitialized memory
Fixes: msan_uninit-mem_7fa8c49400d0_3923_audiosig.rm
Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Fixes use of uninitialized memory
Fixes: msan_uninit-mem_7f2785ab8669_6838_mewmew_vorbis_ssa.nut
Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

* commit '9409c9bd':
  configure: Disable networking if winsock2.h is available but winsock functions aren't
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '01d245ef':
  random_seed: Rewrite the generic clock() based seed code

Conflicts:
	libavutil/random_seed.c

See: 66531c75Merged-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>

The define does not originate from configure, so it should not
have a name that is CONFIG_-prefixed.

20 ms is the default in the libopus encoder, and gives better
quality than 10 ms.
Signed-off-by: Martin Storsjö <martin@martin.st>

Previously, if neither of the checks for the closesocket function
succeeded, we still kept winsock2.h and networking in general
enabled.

When targeting the WinRT API subset, the winsock2.h header is
available (making the check for it succeed, giving the impression
that winsock is available), but tests that actually try to use
such a function will fail. In this case, disable the winsock2.h
feature and networking in general, as if the winsock2.h header
test would have failed in the first place.
Signed-off-by: Martin Storsjö <martin@martin.st>

The new code is faster and reuses the previous state in case of
multiple calls.

The previous code could easily end up in near-infinite loops,
if the difference between two clock() calls never was larger than
1.

This makes fate-parseutils finish in finite time when run in wine,
if CryptGenRandom isn't available (which e.g. isn't available if
targeting Windows RT/metro).

Patch originally by Michael Niedermayer but with some modifications
by Martin Storsjö.
Signed-off-by: Martin Storsjö <martin@martin.st>

* qatar/master:
  configure: Update freetype check to follow upstream

Conflicts:
	configure

Not merged, as its broken (Reported by ubitux)

See: cea5812fMerged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'd68dc3c9':
  drawtext: Drop pointless header

See: cea5812fMerged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '6892d145':
  segafilm: fix leaks if reading the header fails

Conflicts:
	libavformat/segafilm.c

See: ca5456dbMerged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '9cbf2d78':
  pthread_frame: unref decoded frames on failure
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'a03a642d':
  h264: do not use 422 functions for monochrome

See: 07abf13dMerged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '9eef9eb3':
  h264: check that execute_decode_slices() is not called too many times

Conflicts:
	libavcodec/h264.c

The check is replaced by an assert() as the mb index should not ever go out
of bounds.
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'bfd26b7c':
  h264: reject mismatching luma/chroma bit depths during sps parsing

Conflicts:
	libavcodec/h264_ps.c

See: bdeb61ccMerged-by: Michael Niedermayer <michaelni@gmx.at>

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

* commit '9a026c72':
  h264: rebuild the default ref list if the reference count changes

Conflicts:
	libavcodec/h264.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '4736d003':
  cavsdec: check ff_get_buffer() return value

Conflicts:
	libavcodec/cavsdec.c

See: eee8c94fMerged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '50079a6a':
  lavc: do not leak the internal frame if opening the codec fails

Conflicts:
	libavcodec/utils.c

See: 8b285f03Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '3867f371':
  lavf: remove a pointless check

Conflicts:
	libavformat/utils.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '75647dea':
  oggparseogm: check timing variables

See: 9ed388f5Merged-by: Michael Niedermayer <michaelni@gmx.at>