Add initial video playback support for Ogg Theora videos (resolves issue #66.)

The basic APIs are:

video = love.graphics.newVideo("myvideo.ogv")

love.graphics.draw(video, ...) -- Video objects are Drawables.

video:play(), video:pause()

video:getDuration(), video:tell(), video:rewind(), video:seek(seconds)

video:getSource()

video:getWidth(), video:getHeight(), video:setFilter(min, mag)

More advanced APIs include video:setSource(source), video:getStream(), and videostream:setSync.

To use a custom pixel shader when drawing a Video, call the new TexelVideo(texcoords) function instead of Texel(texture, texcoords) in order to get the pixel colors of a video frame.

platform/unix/configure.ac

@@ -53,6 +53,7 @@ PKG_CHECK_MODULES([openal], [openal], [], [LOVE_MSG_ERROR([OpenAL])])
 PKG_CHECK_MODULES([libmodplug], [libmodplug], [], [LOVE_MSG_ERROR([libmodplug])])
 PKG_CHECK_MODULES([vorbisfile], [vorbisfile], [], [LOVE_MSG_ERROR([libvorbis and libvorbisfile])])
 PKG_CHECK_MODULES([zlib], [zlib], [], [LOVE_MSG_ERROR([zlib])])
+PKG_CHECK_MODULES([theora], [theoradec], [], [LOVE_MSG_ERROR([libtheora])])
 
 # Other libraries
 AC_SEARCH_LIBS([sqrt], [m], [], [LOVE_MSG_ERROR([the C math library])])

platform/unix/genmodules

@@ -114,7 +114,7 @@ cat > src/Makefile.am << EOF
 AM_CPPFLAGS = -I$inc_current -I$inc_modules -I$inc_libraries -I$inc_libraries/enet/libenet/include \$(LOVE_INCLUDES) \$(FILE_OFFSET)\
 	\$(SDL_CFLAGS) \$(lua_CFLAGS) \$(freetype2_CFLAGS)\
 	\$(openal_CFLAGS) \$(zlib_CFLAGS) \$(libmodplug_CFLAGS)\
-	\$(vorbisfile_CFLAGS)
+	\$(vorbisfile_CFLAGS) \$(theora_CFLAGS)
 AUTOMAKE_OPTIONS = subdir-objects
 SUBDIRS =
 SUFFIXES = .lua .lua.h
@@ -146,7 +146,7 @@ liblove${love_amsuffix}_la_LDFLAGS = -module -export-dynamic \$(LDFLAGS)
 liblove${love_amsuffix}_la_LIBADD = \
 	\$(SDL_LIBS) \$(freetype2_LIBS) \$(lua_LIBS)\
 	\$(openal_LIBS) \$(zlib_LIBS) \$(libmodplug_LIBS)\
-	\$(vorbisfile_LIBS)
+	\$(vorbisfile_LIBS) \$(theora_LIBS)
 EOF
 
 genmodules >> src/Makefile.am