matroska: K&R formatting cosmetics
matroska: Factor out write_track from mkv_write_tracks
matroska: Factor out mkv_write_stereo_mode
Merge commit 'f1f6156b3fc9eb77b439d031ba18974d80b8341e'

* commit 'f1f6156b3fc9eb77b439d031ba18974d80b8341e':
  matroska: K&R formatting cosmetics

Conflicts:
	libavformat/matroskaenc.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit 'b75a1f9892b5b715397edbf837e4d4cda337907b'

* commit 'b75a1f9892b5b715397edbf837e4d4cda337907b':
  matroska: Factor out write_track from mkv_write_tracks

Conflicts:
	libavformat/matroskaenc.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit '48e6432407a73d5006d84609456e6e0bc3dd8fc4'

* commit '48e6432407a73d5006d84609456e6e0bc3dd8fc4':
  matroska: Factor out mkv_write_stereo_mode

Conflicts:
	libavformat/matroskaenc.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>
mjpegdec: Support pix_fmt_id == 0x22112200

Fixes 4780490_300.jpg

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
avcodec/mjpegdec: fix width for non chroma in rescaling

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
avcodec/mjpegdec: Support pix_fmt_id==0x11222200

Fixes: 4858286_300.jpg

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
avcodec/mjpegdec: set upscale_h/upscale_v using generic code instead of hardcoding a list

Some code is left to handle corner cases

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Support raw dvdsub palette as stored on normal dvd's

This is how the palette is stored on dvd's. Currently
only xbmc passes the palette information to libavcodec
this way.
Check return value of avio_seek and avoid modifying state if it fails

The code still modifies state if the timestamp is not found. Not
sure exactly how to avoid that.
asf hacks
if av_read_packet returns AVERROR_IO, we are done. ffmpeg's codecs might or might not handle returning any completed demuxed packets correctly
added: Ticket #7187, TV Teletext support for DVB EBU Teletext streams
Don't accept mpegts PMT that isn't current
Don't reparse PMT unless it's version has changed
Read PID timestamps as well as PCR timestamps to find location in mpegts stream
Get stream durations using read_timestamp
changed: allow 4 second skew between streams in mov before attempting to seek