Canopus Lossless decoder

At the moment it only does BGR24, but I plan to add the rest after.

Signed-off-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>

libavcodec/avcodec.h

@@ -274,6 +274,7 @@ enum CodecID {
     CODEC_ID_YUV4       = MKBETAG('Y','U','V','4'),
     CODEC_ID_SANM       = MKBETAG('S','A','N','M'),
     CODEC_ID_PAF_VIDEO  = MKBETAG('P','A','F','V'),
+    CODEC_ID_CLLC       = MKBETAG('C','L','L','C'),
 
     /* various PCM "codecs" */
     CODEC_ID_FIRST_AUDIO = 0x10000,     ///< A dummy id pointing at the start of audio codecs