f872b19714
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_bi_hv4_8_c: 385.7 put_hevc_qpel_bi_hv4_8_neon: 131.0 put_hevc_qpel_bi_hv4_8_i8mm: 92.2 put_hevc_qpel_bi_hv6_8_c: 701.0 put_hevc_qpel_bi_hv6_8_neon: 239.5 put_hevc_qpel_bi_hv6_8_i8mm: 191.0 put_hevc_qpel_bi_hv8_8_c: 1162.0 put_hevc_qpel_bi_hv8_8_neon: 228.0 put_hevc_qpel_bi_hv8_8_i8mm: 225.2 put_hevc_qpel_bi_hv12_8_c: 2305.0 put_hevc_qpel_bi_hv12_8_neon: 558.0 put_hevc_qpel_bi_hv12_8_i8mm: 483.2 put_hevc_qpel_bi_hv16_8_c: 3965.2 put_hevc_qpel_bi_hv16_8_neon: 732.7 put_hevc_qpel_bi_hv16_8_i8mm: 656.5 put_hevc_qpel_bi_hv24_8_c: 8709.7 put_hevc_qpel_bi_hv24_8_neon: 1555.2 put_hevc_qpel_bi_hv24_8_i8mm: 1448.7 put_hevc_qpel_bi_hv32_8_c: 14818.0 put_hevc_qpel_bi_hv32_8_neon: 2763.7 put_hevc_qpel_bi_hv32_8_i8mm: 2468.0 put_hevc_qpel_bi_hv48_8_c: 32855.5 put_hevc_qpel_bi_hv48_8_neon: 6107.2 put_hevc_qpel_bi_hv48_8_i8mm: 5452.7 put_hevc_qpel_bi_hv64_8_c: 57591.5 put_hevc_qpel_bi_hv64_8_neon: 10660.2 put_hevc_qpel_bi_hv64_8_i8mm: 9580.0 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.