5cbeefc79e
As the plain neon qpel_h functions process two rows at a time, we need to allocate storage for h+8 rows instead of h+7. By allocating storage for h+8 rows, incrementing the stack pointer won't end up at the right spot in the end. Store the intended final stack pointer value in a register x14 which we store on the stack. AWS Graviton 3: put_hevc_qpel_hv4_8_c: 386.0 put_hevc_qpel_hv4_8_neon: 125.7 put_hevc_qpel_hv4_8_i8mm: 83.2 put_hevc_qpel_hv6_8_c: 749.0 put_hevc_qpel_hv6_8_neon: 207.0 put_hevc_qpel_hv6_8_i8mm: 166.0 put_hevc_qpel_hv8_8_c: 1305.2 put_hevc_qpel_hv8_8_neon: 216.5 put_hevc_qpel_hv8_8_i8mm: 213.0 put_hevc_qpel_hv12_8_c: 2570.5 put_hevc_qpel_hv12_8_neon: 480.0 put_hevc_qpel_hv12_8_i8mm: 398.2 put_hevc_qpel_hv16_8_c: 4158.7 put_hevc_qpel_hv16_8_neon: 659.7 put_hevc_qpel_hv16_8_i8mm: 593.5 put_hevc_qpel_hv24_8_c: 8626.7 put_hevc_qpel_hv24_8_neon: 1653.5 put_hevc_qpel_hv24_8_i8mm: 1398.7 put_hevc_qpel_hv32_8_c: 14646.0 put_hevc_qpel_hv32_8_neon: 2566.2 put_hevc_qpel_hv32_8_i8mm: 2287.5 put_hevc_qpel_hv48_8_c: 31072.5 put_hevc_qpel_hv48_8_neon: 6228.5 put_hevc_qpel_hv48_8_i8mm: 5291.0 put_hevc_qpel_hv64_8_c: 53847.2 put_hevc_qpel_hv64_8_neon: 9856.7 put_hevc_qpel_hv64_8_i8mm: 8831.0 Signed-off-by: Martin Storsjö <martin@martin.st>
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.