Fix Ticket #1617, revealing a regression I introduced in 8f3eebd6.

We need to make sure no stream is added in between Ogg context save and
restore operations (because it would likely lead to a mismatch between
ogg->nstreams and AVFormatContext->nb_streams after the restore op).
This is the reason the ogg->state check is added in ogg_new_stream().
Before this patch, checking for ogg->headers was preventing this:
ogg->headers is always set before any ogg save/restore (though, it was
also preventing from creating the stream when necessary).

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

* qatar/master:
  libx264: add forgotten ;
  matroskadec: fix a sanity check.
  matroskadec: only return corrupt packets that actually contain data
  lavf: zero data/size of the packet passed to read_packet().
  ARM: use 2-operand syntax for ADD Rd, PC in Apple PIC code
  ARM: align PIC offset pools to 4 bytes
  ARM: swap source operands in some add instructions
  configure: update tms470 detection for latest version
  lavf probe: prevent codec probe with no data at all seen
  motion_est: fix use of inline on extern functions

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

Fix possible crash when long_name is not defined (for example if
--enable-small).

Possibly safer.

Previously when saturation was reinited, the old value was freed when
setting options, and freed again in PARSE_EXPRESSION().

Avoid possible segmentation fault if codec_long_name is defined as
NULL (for example if --enable-small).

Fixes bug 372.

The Apple assembler refuses to assemble the 3-operand form
in Thumb2 even though it is valid syntax.
Signed-off-by: Mans Rullgard <mans@mansr.com>

When building Thumb2 code, the end of a function, where the PIC
offsets are placed, need not be aligned.  Although the values
are only accessed with instructions allowing unaligned addresses,
keeping them aligned is preferable.
Signed-off-by: Mans Rullgard <mans@mansr.com>

Fixes out of array read, should fix ffprove fate failure
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

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>

This allows using a 16-bit opcode when generating Thumb2 code.
Signed-off-by: Mans Rullgard <mans@mansr.com>

v5.0 of the TI ARM compiler changes the version string.
This updates the detection to check for both the old and
the new strings.
Signed-off-by: Mans Rullgard <mans@mansr.com>

This occurs with fuzzed mpeg-ts files. set_codec_from_probe_data() is
called with a zeroed AVProbeData since no packet made through for
specific stream.

* 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.

Inline functions declared without extern do not provide an external
definition in standard C99.  This code only works because most
compilers do not implement the inline semantics correctly.  With a
stricter compiler, linking fails with unresolved references to these
functions.

Declaring the functions extern inline works correctly with some
compilers while some others still fail to create external definitions.

For maximum portability, create a static inline version with an
externally visible wrapper for ff_get_mb_score.  ff_epzs_motion_search
is so large that no sane compiler inlines it anyway, so there the
inline keyword can simply be dropped with no effect.
Signed-off-by: Mans Rullgard <mans@mansr.com>

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