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748e960e04
Currently, packed16togbra16() always sets the alpha value to 0xFFFF, without taking the bit depth into consideration. This causes a bug on x86, which can be reproduced with: ./libswscale/tests/swscale -unscaled 1 -src xyz12le -dst gbrap12be The problem arises in ff_hscale14to15_4_ssse3(), in the conversion from gbrap12be to yuva444p, which comes after the conversion from xyz12le to gbrap12be. It has something to do with pmaddwd not working on unsigned values. There is some code to deal with 0xFFFF if the input has a bit depth of 16, but not for bit depths < 16. We could fix ff_hscale14to15_4_ssse3() to also work correctly with 0xFFFF on bit depths < 16, or we could just not write 0xFFFF there in the first place, which is what this commit does.
FFmpeg README
FFmpeg is a collection of libraries and tools to process multimedia content such as audio, video, subtitles and related metadata.
Libraries
libavcodecprovides implementation of a wider range of codecs.libavformatimplements streaming protocols, container formats and basic I/O access.libavutilincludes hashers, decompressors and miscellaneous utility functions.libavfilterprovides means to alter decoded audio and video through a directed graph of connected filters.libavdeviceprovides an abstraction to access capture and playback devices.libswresampleimplements audio mixing and resampling routines.libswscaleimplements color conversion and scaling routines.
Tools
- ffmpeg is a command line toolbox to manipulate, convert and stream multimedia content.
- ffplay is a minimalistic multimedia player.
- ffprobe is a simple analysis tool to inspect multimedia content.
- Additional small tools such as
aviocat,ismindexandqt-faststart.
Documentation
The offline documentation is available in the doc/ directory.
The online documentation is available in the main website and in the wiki.
Examples
Coding examples are available in the doc/examples directory.
License
FFmpeg codebase is mainly LGPL-licensed with optional components licensed under GPL. Please refer to the LICENSE file for detailed information.
Contributing
Patches should be submitted to the ffmpeg-devel mailing list using
git format-patch or git send-email. Github pull requests should be
avoided because they are not part of our review process and will be ignored.