More consistent/readable.

The new function accepts a slightly more intuitive order of paramters,
and returns an error code, thus allowing applications to report a
meaningful error message.

Address trac issue #33.

* qatar/master:
  ffmpeg: get rid of the -vglobal option.
  dct32: Add AVX implementation of 32-point DCT
  dct32: Change pass 6 permutation to allow for AVX implementation
  dct32: port SSE 32-point DCT to YASM
  multiple inclusion guard cleanup
  avio: document buffer must created with av_malloc() and friends
  avio: check AVIOContext malloc failure
  swscale: point out an alternative to sws_getContext
  svq3: Do initialization after parsing the extradata
  add changelog entries for 0.7_beta2
  mp3lame: add #include required for AV_RB32 macro.

Conflicts:
	Changelog
	libavcodec/svq3.c
	libavcodec/x86/dct32_sse.c
	libavfilter/vsrc_buffer.h
Merged-by: Michael Niedermayer <michaelni@gmx.at>

Fixes ticket212
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Rename "default" -> "output1", "default2" -> output2.

Improve logical coherence, fix nit.

Fixes ticket183
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

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

It's badly documented and does the same thing as -flags global_header,
so it's redundant.

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>

Add missing multiple inclusion guards; clean up #endif comments;
add missing library prefixes; keep guard names consistent.

Else a later buffer resize in ffio_set_buf_size() will ABORT.
Signed-off-by: Anton Khirnov <anton@khirnov.net>

Signed-off-by: Anton Khirnov <anton@khirnov.net>

Signed-off-by: Anton Khirnov <anton@khirnov.net>

If done before, some parameters aren't known yet.

With svq3/rtp, initializing before some parameters are known
can lead to calling av_malloc(0), which on OS X currently returns
broken pointers.

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>

Fixes compilation with mp3lame enabled.