We don't have a text encoder yet, so this commit makes automatic
encoding working with srt output.

The SRT format should never have outputted CODEC_ID_SRT packets in the
first place: SRT is a subtitle format containing SubRip text markup
events. The timing information is part of the format, not the codec, and
thus CODEC_ID_SRT should not exist.

Creating packets with the timing information within the payload only
leads to problem (such as remuxing with timing alteration not working),
especially when the SubRip markup is being used in container like
Matroska in addition to this standalone SRT format.

The main reason the timing line was included in those CODEC_ID_SRT
packets is likely because it contained extra information (the event
position) the codec actually needs. This issue is solved by using the
AV_PKT_DATA_SUBTITLE_POSITION side data type.

This commit introduces a new packet side data type for the subtitle
position information. This is meant to be used by the SRT format where
that information is stored along with the timing, which is not part of
the subrip packets.

This allows side data to be transmitted properly with subtitles.

Also fix potential overflow (CID733778)

Allow to factorize buffers initialization/release, for all the writers
which use it. Simplify.

I cannot find a reason for such a rule, which was resulting in badly
escaped filtergraph snippets.

Fix trac ticket #1610.

If someone finds a cleaner fix, dont hesitate to revert this!
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

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

It is possible to support files with odd width and/or height
if real width and height are stored in header.
Signed-off-by: Paul B Mahol <onemda@gmail.com>

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

None of these are likely unless the user is writing a file with two billion
streams or a duration of around two months.

This fixes CIDs 700568, 700569, 700570, 700571, 700572 and 700573.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

This fixes CID 733800.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

There's a a potential DoS problem in this function. Say an MXF file is
created with a PixelLayout with a long run of non-zeroes. Such a file could be
sent quickly (packed) over the net and would unpack quite fast. mxfdec would
then read it byte-by-byte, which would take considerable time.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Coverity thinks ofs can end up 15, thus writing past the end of layout[]. This
is incorrect since it's always incremented by 2. Checking ofs <= 14 makes
Coverity happy and doesn't hurt.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

They dont work at all and trash the output totally
also they are unmaintained -> that is if you want to maintain them
contact us !
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

This check is somewhat more lenient as would be ideal because we dont
know if the input is signed or unsigned
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

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

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

* qatar/master:
  asfdec: cosmetics, reformat ff_asf_parse_packet()
  g.723.1: add missing CODEC_CAP_DR1
  avconv: remove now unneeded calls to avcodec_get_frame_defaults().
  lavc: initialize output AVFrame before decoding.

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

* commit 'c68317eb':
  lavc: fix documentation for AVCodecContext.delay
  atrac3: return an error if extradata_size is not a specific known size
  lavc: use the correct API version guard macro for avcodec_encode_audio()
  Move Doxyfile into the doc/ subdirectory
  doxygen: Build Doxygen documentation in the doc/ subdirectory
  dfa: use av_memcpy_backptr() where previously impossible
  av_memcpy_backptr: Drop no longer necessary malloc padding

Conflicts:
	.gitignore
	libavcodec/avcodec.h
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'd82f1885':
  Remove need for padding in av_memcpy_backptr()

Conflicts:
	libavutil/lzo.h
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'ceb754d0':
  lzo: Use AV_COPY*U macros where appropriate
  prepare 9_beta2 release
  dsputil: Replace AV_WNxx(AV_RNxx()) combinations by AV_COPYxxU
  intreadwrite: Add AV_COPYxxU macros for copying to/from unaligned addresses
  dxtory: Replace AV_WN16A(AV_RN16A()) combination by AV_COPY16
  mp3: properly forward mp_decode_frame errors

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

* commit '0c03cc68':
  mp3: exit on parsing error in mp_decode_frame
  rtmppkt: Avoid unescaped backslash in Doxygen comment
  fate-lavfi: replace sed/grep/cut combos with awk
  build: Plan 9 support

Conflicts:
	configure
	tests/lavfi-regression.sh
Merged-by: Michael Niedermayer <michaelni@gmx.at>

The code from libav seems to have been entirely untested.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

* commit '80521c19':
  build: allow targets to specify extra objects to link with executables
  swscale: avoid pointless use of compound literals
  libm: add fallbacks for various single-precision functions
  network: use getservbyport() only if available
  network: add fallbacks for INADDR_LOOPBACK and INET_ADDRSTRLEN
  Include sys/time.h before sys/resource.h

Conflicts:
	Makefile
	configure
	libavutil/libm.h
Merged-by: Michael Niedermayer <michaelni@gmx.at>

Avoids memleaks with audio when extended_data is nontrivial and the user
doesn't reset the frame.
Shouldn't have any effect for video for now, but might be useful in the
future.

Fixes CID703747
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Fixes CID703748
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Fixes CID739472
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

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

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