Move the demuxers into their own file.

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

Currently, errors are thrown for various macros while building that are completely bogus.
They occur during the dependency (.d) generation phase, and have no bearing on the compiled output,
since only the stdout is piped into the sed command to generate the .d files.
They basically occur as the relevant -I paths are not (and cannot be passed) during
the dependancy generation phase.
As such, this patch silences them.
Signed-off-by: Ganesh Ajjanagadde <gajjanagadde@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

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

Move the demuxer into its own file.

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

This patch silences such warnings by placing initializations under a header guard,
see e.g
http://fate.ffmpeg.org/log.cgi?time=20150919095430&log=compile&slot=x86_64-archlinux-gcc-disableswscale,
http://fate.ffmpeg.org/log.cgi?time=20150919095048&log=compile&slot=x86_64-archlinux-gcc-disableswresample
for examples of such warnings.
It also has the benefit of placing library specific #defines next to each other.
Signed-off-by: Ganesh Ajjanagadde <gajjanagadde@gmail.com>

SDL_CreateMutex and SDL_CreateCond can fail:
https://wiki.libsdl.org/SDL_CreateMutex.
This patch makes handling more robust in one instance.
Signed-off-by: Ganesh Ajjanagadde <gajjanagadde@gmail.com>
Signed-off-by: Marton Balint <cus@passwd.hu>

Also add a short description for the help output.

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

zlib is used as a suggest/select target not a dep
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

This silences some of the -Wunused-function warnings when compiled with --disable-mmx, e.g
http://fate.ffmpeg.org/log.cgi?time=20150919094617&log=compile&slot=x86_64-archlinux-gcc-disable-mmx.
Header guards are too brittle and ugly for this case.
Signed-off-by: Ganesh Ajjanagadde <gajjanagadde@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

This will give incorrect results in some cases due to not parsing segments
separately, so it currently requires -strict experimental.
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

* commit 'e54d7e4e':
  dnxhddata: Deduplicate cid 1256 chroma table
Merged-by: Hendrik Leppkes <h.leppkes@gmail.com>

* commit '1fb63d6f':
  dnxhddata: Deduplicate dnx100 tables
Merged-by: Hendrik Leppkes <h.leppkes@gmail.com>

* commit 'cc320296':
  dnxhddata: Fix cid 1260 luma and chroma tables
Merged-by: Hendrik Leppkes <h.leppkes@gmail.com>

* commit 'bfe1cd80':
  dnxhddata: Fix 10-bit DNxHD quant matrices
Merged-by: Hendrik Leppkes <h.leppkes@gmail.com>

* commit '38014692':
  x264: Add option to force IDR frames
Merged-by: Hendrik Leppkes <h.leppkes@gmail.com>

* commit 'eb02387a':
  x264: Expose the NV21 input support
Merged-by: Hendrik Leppkes <h.leppkes@gmail.com>

* commit '74942685':
  hls: Check av_opt_set_dict return value as well
Merged-by: Hendrik Leppkes <h.leppkes@gmail.com>

* commit 'd0a3e89d':
  dcadec: make a number of samples per subband per subsubframe a named constant
Merged-by: Hendrik Leppkes <h.leppkes@gmail.com>

* commit '8ae1d87a':
  build: Add support for known custom allocators
Merged-by: Hendrik Leppkes <h.leppkes@gmail.com>

* commit '9a3202a9':
  Screenpresso SPV1 decoder
Merged-by: Hendrik Leppkes <h.leppkes@gmail.com>

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

Fixes: https://trac.ffmpeg.org/attachment/ticket/685/movie.264

In the available testcase the actual PPS only uses a few bits
while there are 7kbyte of apparently random data after it
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

* commit '1aa24df7':
  lavu: Deprecate AVFrame.error[]
Merged-by: Hendrik Leppkes <h.leppkes@gmail.com>

* commit '3f1f6053':
  configure: address a copy-paste typo
Merged-by: Hendrik Leppkes <h.leppkes@gmail.com>

This error was produced by rtmproto.c, it is possibly such streams
where dumped, this commit is needed to support them

Fixes: z0e.flv
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

This affects Annex B streams (such as demuxed from .ts and others). It
also handles the format change in reinit-large_420_8-to-small_420_8.h264
correctly.

Instead of passing through the extradata, create it on the fly it from
the currently active SPS and PPS. Since reconstructing the PPS and SPS
NALs would be very complicated and verbose, we use the NALs as they
originally appeared in the bitstream.

The code for writing the extradata is somewhat derived from
libavformat/avc.c, but it's small and different enough that sharing it
is not really worth it.

We assume an upper bound of 4096 bytes for each raw SPS/PPS. It's hard
to determine an exact maximum size, but this value was was considered
high enough and safe.

Needed for the following VideotoolBox commit.

Otherwise, the dsp may change without its permuation being applied.
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

The current one, while correct, does not yield the best possible
results. The specificiations suggest another formula, which results
in quality gains in the decoded output from fate tests. This
justifies changing said formula.
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

The coded size is a multiple of the macroblock size, which is 16.
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

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

Signed-off-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>