295092b46d
The entire set of 32 coefficients and corresponding past 32 samples can fit in a single vector (with LMUL=8) exactly, but... since widening double the needed vector sizes, we still end up too short with 128-bit vectors. This adds a very simple version for future 256+-bit hardware, and for pred_orders values up to 16, and a bit more involved loop for for 128-bit hardware with pred_orders between 17 and 32. With 128-bit hardware, the benchmarks look like this: flac_lpc_32_13_c: 30152.0 flac_lpc_32_13_rvv_i32: 10244.7 flac_lpc_32_16_c: 37314.2 flac_lpc_32_16_rvv_i32: 10126.2 flac_lpc_32_29_c: 61910.0 flac_lpc_32_29_rvv_i32: 14495.2 flac_lpc_32_32_c: 68204.0 flac_lpc_32_32_rvv_i32: 13273.7
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.