Chiebot-Mirror/FFmpeg - FFmpeg - Gitea: Git with a cup of tea

Author	SHA1	Message	Date
Andreas Rheinhardt	ab2173c0a5	avcodec/cbs_h2645: Avoid function pointer casts, fix UB The SEI message read/write functions are called via function pointers where the SEI message-specific context is passed as void. But the actual function definitions use a pointer to their proper context in place of void, making the calls undefined behaviour. Clang UBSan 17 warns about this. This commit fixes this by adding wrapper functions (created via macros) that have the right type that call the actual functions. This reduced the number of failing FATE tests with UBSan from 164 to 85 here. Reviewed-by: Mark Thompson <sw@jkqxz.net> Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>	11 months ago
Andreas Rheinhardt	3ba4f9c21e	avcodec/cbs_sei: Use RefStruct API for SEI messages The SEI message code uses the AVBuffer API for its SEI messages and contained buffers (like the extension buffer for HEVC or the user data (un)registered payload buffers). Contrary to the ordinary CBS code (where some of these contained buffer references are actually references to the provided AVPacket's data so that one can't replace them with the RefStruct API), the CBS SEI code never uses outside buffers at all and can therefore be switched entirely to the RefStruct API. This avoids the overhead inherent in the AVBuffer API (namely the separate allocations etc.). Notice that the refcounting here is actually currently unused; the refcounts are always one (or zero in case of no refcounting); its only advantage is the flexibility provided by custom free functions. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>	1 year ago
Jan Ekström	f4bebc0c34	avcodec/cbs_{h2645,sei}: add support for Ambient Viewing Environment SEI Defined by H.274, this SEI message is utilized by iPhones to save the nominal ambient viewing environment for the display of recorded HDR content.	2 years ago
Mark Thompson	2c96e6cb95	cbs_sei: Detect payload overflows when reading SEI messages The top-level GetBitContext is sized for the whole NAL unit, so it fails to detect overflows where a payload continues into the following message. To fix that, we make a new context on the stack for reading each payload. Fixes: 29892/clusterfuzz-testcase-minimized-ffmpeg_BSF_H264_REDUNDANT_PPS_fuzzer-6310830956216320 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Tested-by: Michael Niedermayer <michael@niedermayer.cc>	4 years ago
Mark Thompson	88b65bed9c	cbs_sei: Remove restrictions on MDCV values Since this was originally written the standards have changed to allow arbitrary values here, but leaves their meaning unspecified.	4 years ago
Mark Thompson	8843607f49	cbs_h2645: Merge SEI message handling in common between codecs	4 years ago
Mark Thompson	4bf3384800	cbs_h2645: Merge SEI messages in common between codecs Make a new template file for common SEI messages - this will also apply to H.266.	4 years ago