GStreamer's "theoradec" element always calls th_decode_ctl() for all telemetry
options, passing 0 if they are not enabled. This results in our creating a
Cairo buffer and performing YUV/RGB conversion, even if all telemetry is
disabled, which is very slow and can cause noticeable lag during playback.

svn path=/trunk/theora/; revision=18759

There was never any reason for these to not be const, and it
 shouldn't break backwards API or ABI compatibility.

svn path=/trunk/theora/; revision=18348

It wrongly claimed the returned buffer was owned by libtheora, when
 in reality libtheora was creating a temporary buffer and not
 storing the pointer to the returned packet anywhere.
Since there's no encoder parameter passed to this function, it
 doesn't even have a place to store it.
This situation is sub-optimal, but can be solved by migrating to
 the 1.0 API, which does require an encoder instance to encode a
 comment, and thus does not have this problem.

Fixes #726.

svn path=/trunk/theora/; revision=17994

Patch by mnemo.
Fixes #1804.

svn path=/trunk/theora/; revision=17989

THEORA_DISABLE_FLOAT C preprocessor symbol.

This originally disabled slow floating point code in the library,
but the critical path code has all been removed. It also used
to disable function of th_granule_time() which returns a double,
but it has not done so since prior to the 1.0 release, and there
have been no complaints.

It might be helpful to restore this option if it eliminated    
the th_granule_time() API entry entirely, so that platforms
without native floating point don't have to link to an emulation
library, but in the absence of a request we prefer shorter code.

svn path=/trunk/theora/; revision=17951

Make a note that passing 0 for the bitrate may not be guaranteed to
 return an error in future versions.

svn path=/trunk/theora/; revision=17949

svn path=/trunk/theora/; revision=17876

I've always found two different API links for libtheoradec hard
to find on the main documentation page. This reformats them to
be more obvious, and shifts the emphasis further away from the
legacy api.

I've also added notes about which library to link with to the
API groups in codec.h.

svn path=/trunk/theora/; revision=17833

svn path=/trunk/theora/; revision=17787

to the control codes passed.

svn path=/trunk/theora/; revision=17639

This will be the basis of the 1.2.x releases.

svn path=/trunk/theora/; revision=17445