Prior to this it could theoretically become negative and read
out of array.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Fixes regression since 98f753ecSigned-off-by: Michael Niedermayer <michaelni@gmx.at>

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

Done to simplify next commit introducing av_copy_packet()
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

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

fixes regression from the xing toc support
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

* qatar/master:
  mp3dec: read Xing frame TOC index
  mp3dec: use named constants for Xing header flags
  libx264: add support for nal-hrd, required for Blu-ray streams.
  mov: support random access point grouping
  matroskadec: properly support BlockDuration

Conflicts:
	libavcodec/libx264.c
	libavformat/isom.h
	libavformat/matroskadec.c
	libavformat/mov.c
	libavformat/mp3dec.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'c831ebf6':
  matroskadec: split frame parsing
  matroskadec: split laces parsing

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

* commit '117d8c6d':
  matroska: implement support for ProRes
  matroska: implement support for ALAC

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

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

* commit '870e7552':
  matroskadec: validate lace_size when parsed
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'c9a39cec':
  matroskadec: return meaningful errors in matroska_decode_buffer
  matroskadec: fix incorrect unsigned->signed conversion

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

* commit '8d4dd55c':
  matroskadec: refactor matroska_decode_buffer

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

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

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

Previously the device was returning EOF when the first sink was ending,
with the current change the device will continue to return frames until
all the sinks are EOF, which seems the most expected behavior.

Compute duration in microseconds, rather than in timebase units. Decrease
approximation errors.

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

This code causes infinite loops
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

* commit '581281e2':
  matroskadec: check realloc in lzo encoding
  matroska: honor error_recognition on unknown doctypes
  tiffdec: Add support for GRAY16LE.
  tiffenc: Add support for little endian RGB48 and GRAY16
  mpeg4: support frame parameter changes with frame-mt
  mpegvideo: check ff_find_unused_picture() return value for errors
  mpegvideo: release frame buffers before freeing them
  configure: msvc: default to 'lib' as 'ar' tool
  build: support some non-standard ar variants

Conflicts:
	libavcodec/h263dec.c
	libavcodec/mpegvideo.c
	libavcodec/tiff.c
	libavcodec/tiffenc.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>

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

Reviewed-by: Tomas Härdin <tomas.hardin@codemill.se>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

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

Based on code by: Clément Bœsch <ubitux@gmail.com>
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: Michael Niedermayer <michaelni@gmx.at>

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

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

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

Frames described by this grouping are the starter of a closed or
an open GOP.
This is useful for open GOP of H.264 stream which is not described
by sync sample atom.
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>

Support Matroska native formatting.

On demuxing prepend a Frame container atom (32bit big endian encoded
frame size and 'icpf' string).
On muxing remove it.

Stricter validation, explicitly exit on misparsing and some error
forwarding from the ebml parsing functions used.

Make MATROSKA_TRACK_ENCODING_COMP_HEADERSTRIP behave like
the other encodings and spare few lines of boilerplate code.