Here is a new video output plugin that passes raw data to the front end
through supplied callbacks.

--HG--
extra : transplant_source : -AT%2A%0A%EB%F5%1Eu4%9E%12%C4%B8%0B%87%13%A5%9D%CA

xine_get_current_frame() relies on the caller to provide a sufficiently
sized buffer. To calculate the required size of the buffer, one has to
call xine_get_current_frame() to retrieve the necessary parameters. But
as the image can change between two successive calls one has to pause
the stream for consistency.
To improve the situation, xine_get_current_frame_s() has been introduced
which requires to specify the buffer size when an image is going to be
retrieved. Furthermore, it will return the required/used buffer size.
In that way, it can prevent copying data into a too small buffer and
therefore can be considered safe.
For convenience, xine_get_current_frame_alloc() is provided which takes
care to allocate a sufficiently sized buffer. This function avoids
pausing the stream as the image will be returned in a single call.

(transplanted from 659598a5840c6d8745dc629e83971782d32e814e)

--HG--
extra : transplant_source : e%95%98%A5%84%0Cm%87E%DCb%9E%83%97%17%82%D3.%81N

--HG--
extra : transplant_source : %E0%D0%C5%8B%BEU%DD%24%5D7%1F%ADV%AD%EB%23%CBU%80%EB

For contributed code, leave whatever the version we last synced for is using
to make simpler future syncs.

Intent is to allow front ends to rename their old, badly-named, config items.

config.h is now include/configure.h and no longer #includes os_internals.h.
A new file, include/config.h, #includes both; this breaks a #include loop.
Other files are updated accordingly.