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FFmpeg git repo
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Martin Storsjö 5ab138673b aarch64: hevc: Produce plain neon versions of qpel_uni_hv 
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_uni_hv4_8_c: 384.2
put_hevc_qpel_uni_hv4_8_neon: 127.5
put_hevc_qpel_uni_hv4_8_i8mm: 85.5
put_hevc_qpel_uni_hv6_8_c: 705.5
put_hevc_qpel_uni_hv6_8_neon: 224.5
put_hevc_qpel_uni_hv6_8_i8mm: 176.2
put_hevc_qpel_uni_hv8_8_c: 1136.5
put_hevc_qpel_uni_hv8_8_neon: 216.5
put_hevc_qpel_uni_hv8_8_i8mm: 214.0
put_hevc_qpel_uni_hv12_8_c: 2259.5
put_hevc_qpel_uni_hv12_8_neon: 498.5
put_hevc_qpel_uni_hv12_8_i8mm: 410.7
put_hevc_qpel_uni_hv16_8_c: 3824.7
put_hevc_qpel_uni_hv16_8_neon: 670.0
put_hevc_qpel_uni_hv16_8_i8mm: 603.7
put_hevc_qpel_uni_hv24_8_c: 8113.5
put_hevc_qpel_uni_hv24_8_neon: 1474.7
put_hevc_qpel_uni_hv24_8_i8mm: 1351.5
put_hevc_qpel_uni_hv32_8_c: 14744.5
put_hevc_qpel_uni_hv32_8_neon: 2599.7
put_hevc_qpel_uni_hv32_8_i8mm: 2266.0
put_hevc_qpel_uni_hv48_8_c: 32800.0
put_hevc_qpel_uni_hv48_8_neon: 5650.0
put_hevc_qpel_uni_hv48_8_i8mm: 5011.7
put_hevc_qpel_uni_hv64_8_c: 57856.2
put_hevc_qpel_uni_hv64_8_neon: 9863.5
put_hevc_qpel_uni_hv64_8_i8mm: 8767.7

Signed-off-by: Martin Storsjö <martin@martin.st>
2024-03-26 09:05:55 +02:00
compat
doc avutil/timestamp: introduce av_ts_make_time_string2 for better precision 2024-03-25 21:30:51 +01:00
ffbuild
fftools fftools/ffmpeg_mux_init: Fix double-free on error 2024-03-26 06:48:35 +01:00
libavcodec aarch64: hevc: Produce plain neon versions of qpel_uni_hv 2024-03-26 09:05:55 +02:00
libavdevice avformat/internal: Move FF_FMT_INIT_CLEANUP to demux.h 2024-03-26 06:36:43 +01:00
libavfilter avfilter/af_channelmap: add some additional checks for the mappings 2024-03-24 21:27:55 +01:00
libavformat avformat/internal: Move FF_FMT_INIT_CLEANUP to demux.h 2024-03-26 06:36:43 +01:00
libavutil avutil/timestamp: change precision of av_ts_make_time_string() 2024-03-25 21:30:51 +01:00
libpostproc
libswresample
libswscale avutil/x86util: Fix broken pre-SSE4.1 PMINSD emulation 2024-03-17 13:52:27 +01:00
presets
tests avutil/timestamp: change precision of av_ts_make_time_string() 2024-03-25 21:30:51 +01:00
tools tools/target_dec_fuzzer: Adjust RKA threshold up further 2024-03-25 21:41:26 +01:00
.gitattributes
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.travis.yml
Changelog Changelog: add dnn libtorch backend entry 2024-03-23 11:42:13 +01:00
configure configure: Make hls demuxer select AAC, AC3 and EAC3 demuxers 2024-03-26 06:36:43 +01:00
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README.md

FFmpeg README

FFmpeg is a collection of libraries and tools to process multimedia content such as audio, video, subtitles and related metadata.

Libraries

  • libavcodec provides implementation of a wider range of codecs.
  • libavformat implements streaming protocols, container formats and basic I/O access.
  • libavutil includes hashers, decompressors and miscellaneous utility functions.
  • libavfilter provides means to alter decoded audio and video through a directed graph of connected filters.
  • libavdevice provides an abstraction to access capture and playback devices.
  • libswresample implements audio mixing and resampling routines.
  • libswscale implements 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, ismindex and qt-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.