4 Commits

Author	SHA1	Message	Date
Kostya Shishkov	4cfb0d871d	tscc2: do not add/subtract 128 bias during DCT ... It turns out that the reference decoder subtracts 128 from DC during block decode but adds it back during reordering block with zigzag pattern. Transforming block with incorrect DC caused heavy visual artifacts for many quantisers.	2012-07-18 07:05:59 +02:00
Kostya Shishkov	3c6c19184c	tscc2: fix typo in DCT	2012-07-18 07:05:53 +02:00
Kostya Shishkov	0b40153d20	tscc2: DCT output should not be clipped ... This fixes decoding some TSCC2 files with large quantisers.	2012-07-17 07:21:24 +02:00
Kostya Shishkov	781888da89	TechSmith Screen Codec 2 decoder	2012-07-11 07:29:05 +02:00