Create a stereo_mode metadata tag to specify the stereo 3d video layout using the StereoMode tag in a matroska/webm video track.

Commited by michael, for detailed authorship see soc repo

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

libavformat/riff.c has been writing channel_layout for as long as
the field exists.

* qatar/master:
  configure: make executable again
  LATM/AAC: Free previously initialized context on reinit.
  configure: Do not unconditionally add -Wall to host CFLAGS.
  configure: Set OS/2 objformat to a.out.
  Add support for a.out object format to assembler macros.
  fate: disable threading for encoding
  fate: add comment field
  fate: allow overriding default build and install dirs
  mpegtsenc: Add an AVClass pointer to the private data
  mpegaudio: clean up #includes
  mpegaudio: move all header parsing to mpegaudiodecheader.[ch]
Merged-by: Michael Niedermayer <michaelni@gmx.at>

With changes from ubitux.

    * ffmpeg-mt/master:
      Update todo.
      h264: add an assert that copied pictures are valid picture pointers
      valgrind-check: run with 1 and 3 threads
      h264: When decoding a packet with multiple PPS/SPS, don't start the next thread until all of them have been read
      Allow some pictures to be released earlier after 51ead6d2c40c5defdd211f435aec49b19f5f6a18
      h264: fix slice threading MC reading uninitialized frame edges.

    Please see ffmpeg-mt for a list of authors of these changes.

    Conflicts:
        libavcodec/h264.c
        mt-work/valgrind-check.sh
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: Mans Rullgard <mans@mansr.com>

Fixes memory leaks which are the result of overwriting already-initialized
MDCT contexts during context reinitialization, e.g. in valgrind
fate-aac-latm_000000001180bc60.
Signed-off-by: Diego Biurrun <diego@biurrun.de>

Some compilers choke on -Wall, so only add the flag after checking it works.

Signed-off-by: Diego Biurrun <diego@biurrun.de>

This format is still used by e.g. OS/2.
Signed-off-by: Diego Biurrun <diego@biurrun.de>

This explicitly disables threading for encoding as slices are otherwise
automatically activated.  This should be dropped once option resetting
between files is fully implemented.
Signed-off-by: Mans Rullgard <mans@mansr.com>

This adds a comment field to the report header, suitable for
extra information not covered by the automatic fields.
Signed-off-by: Mans Rullgard <mans@mansr.com>

This is useful e.g. for building in a different filesystem than
where the source is kept.
Signed-off-by: Mans Rullgard <mans@mansr.com>

Since a private class is set for this muxer, the callers will
assume that the private data starts with an AVClass pointer.
If no such member exists, the first few bytes of the struct
will be overwritten, and the class pointer may be broken at
any later time.
Signed-off-by: Martin Storsjö <martin@martin.st>

Signed-off-by: Mans Rullgard <mans@mansr.com>

Signed-off-by: Mans Rullgard <mans@mansr.com>

Require the presence of opencv/cxcore.h in place of opencv/cxtypes.h,
which has been removed. Fix compilation with libopencv > 2.1.0.

Fix trac issue #221.

Fix warnings:
cmdutils.c: In function ‘opt_default’:
cmdutils.c:304: warning: initialization discards qualifiers from pointer target type
cmdutils.c: In function ‘set_context_opts’:
cmdutils.c:431: warning: passing argument 2 of ‘alloc_priv_context’ discards qualifiers from pointer target type
cmdutils.c:414: note: expected ‘struct AVClass *’ but argument is of type ‘const struct AVClass *’

Also remove -x264opts item from the ffmpeg manual, since it belongs to
the encoders section.

Make Audio Encoders a separate chapter, and decrese the contained
sections level by one.

Improve rendering, and improve consistency with the other parts of the
manual.

Muxers are not used by ffprobe.

Fix leak.

Avoid the presence of an invalid pointer, fix a crash in case of
get_filtered_frame() failure.

The check is no more required since recent changes in the
avfilter_unref_buffer(), the check is done in the function.
Simplify.

Fix compilation.

* qatar/master:
  qdm2: Use floating point synthesis filter.
  h264: correct border check.
  h264: fix loopfilter with threading at slice boundaries.
  Fix ff_mpa_synth_filter_fixed() prototype
  Rename costablegen.c ---> cos_tablegen.c.
  Collapse tableprint.c into tableprint.h.
  Simplify trig table rules
  Remove potentially unstable filenames from comments in generated files.
  Ignore generated tables and generated table generator programs.
  Simplify CLEANFILES make variable by using wildcards.
  Remove silly insults from avformat_version() Doxygen documentation.
  mpegaudiodsp: fix x86 and ppc makefiles
  configure: Adjust AVX assembler check.
  mpegaudio: remove unused version of SAME_HEADER_MASK
  mpegaudio: remove useless #undef at end of file
  asfdec: add missing #include for av_bswap32()
  mpegaudio: merge two #if CONFIG_FLOAT blocks
  mpegaudio: move some struct definitions from mpegaudio.h
  Move some mpegaudio functions to new mpegaudiodsp subsystem

Conflicts:
	libavcodec/h264.c
	libavcodec/x86/Makefile
Merged-by: Michael Niedermayer <michaelni@gmx.at>

This avoid needlessly convertion from floating point to fixed point and back.
Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>