Avoid a compile-time dependency of the pad filter on libavcodec.

Originally committed as revision 23940 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 23932 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 23931 to svn://svn.ffmpeg.org/ffmpeg/trunk

If both /dev/random and /dev/urandom failed to return data, an
uninitialised value might be returned.  Since most systems have a
non-blocking /dev/urandom or have /dev/random with similar properties,
the chance of blocking is minimal, and the alternative of returning
non-random data is worse.

Originally committed as revision 23930 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 23911 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 23910 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 23909 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 23908 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 23907 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 23905 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 23904 to svn://svn.ffmpeg.org/ffmpeg/trunk

Attempt to read from /dev/urandom and /dev/random with O_NONBLOCK set.
If neither succeeds, proceed with fallbacks.

Originally committed as revision 23903 to svn://svn.ffmpeg.org/ffmpeg/trunk

Makes it give correct results with e.g. gcc 4.4.
For unknown reasons the generate asm code also changes
on e.g. gcc 4.3, making the code a bit larger but also
a bit faster.

Originally committed as revision 23896 to svn://svn.ffmpeg.org/ffmpeg/trunk

No changes in generated code.

Originally committed as revision 23856 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 23855 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 23803 to svn://svn.ffmpeg.org/ffmpeg/trunk

This improves readability a bit.

Originally committed as revision 23767 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 23713 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 23711 to svn://svn.ffmpeg.org/ffmpeg/trunk

errors, far from being a complete test system.

Originally committed as revision 23635 to svn://svn.ffmpeg.org/ffmpeg/trunk

the provided expression.

Allow detection of mistyped expressions.

Originally committed as revision 23629 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 23627 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 23624 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 23622 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 23615 to svn://svn.ffmpeg.org/ffmpeg/trunk

When symbol versioning is enabled, moving symbols from one library to
another breaks binary compatibility.  This adds wrappers with the old
version tag for the av_*packet functions recently moved to lavc.

Originally committed as revision 23611 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 23600 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 23593 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 23592 to svn://svn.ffmpeg.org/ffmpeg/trunk

in the only function that uses the macro.

Originally committed as revision 23555 to svn://svn.ffmpeg.org/ffmpeg/trunk

Based on patches by James Darnley <james dot darnley at gmail dot com>.

Originally committed as revision 23554 to svn://svn.ffmpeg.org/ffmpeg/trunk

ansi color code to colored_fputs(), and pass instead the error level so the
proper color code may be used.

Originally committed as revision 23553 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 23552 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 23551 to svn://svn.ffmpeg.org/ffmpeg/trunk

API public.

Originally committed as revision 23485 to svn://svn.ffmpeg.org/ffmpeg/trunk

addition.

Originally committed as revision 23484 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 23462 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 23461 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 23451 to svn://svn.ffmpeg.org/ffmpeg/trunk

This fixes aspect ratio calculation for encoding from files with 0/0 stored,
common with ogg/theora

Originally committed as revision 23280 to svn://svn.ffmpeg.org/ffmpeg/trunk