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Commit Graph

4 Commits (ab5c4d006da0b3e7aea6fddcebdf5d3d9ad7fd30)

Author	SHA1	Message	Date
Steinar H. Gunderson	08b098169b	speedhq: fix out-of-bounds write ... Certain alpha run lengths (for SHQ1/SHQ3/SHQ5) could be stored in both long and short versions, and we would only accept the short version, returning -1 (invalid code) for the others. This could cause an out-of-bounds write on malicious input, as discovered by Andreas Cadhalpun during fuzzing. Fix by simply allowing both versions, leaving no invalid codes in the alpha VLC. Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>	8 years ago
Michael Niedermayer	1df3d636d4	avcodec/speedhq: Fix warning about "initialization from incompatible pointer type" ... Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>	8 years ago
Steinar H. Gunderson	d68d7198be	speedhq: Align blocks variable properly. ... Seemingly ff_clear_block_sse assumed that the block array is aligned, so make sure it is. Fixes ticket #6079 Signed-off-by: James Almer <jamrial@gmail.com>	8 years ago
Steinar H. Gunderson	2a293ec7ac	avcodec: add Newtek SpeedHQ decoder ... This decoder can decode all existing SpeedHQ formats (SHQ0–5, 7, and 9), including correct decoding of the alpha channel. 1080p is decoded in 142 fps on one core of my i7-4600U (2.1 GHz Haswell), about evenly split between bitstream reader and IDCT. There is currently no attempt at slice or frame threading, even though the format trivially supports both. NewTek very helpfully provided a full set of SHQ samples, as well as source code for an SHQ2 encoder (not included) and assistance with understanding some details of the format.	8 years ago