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FFmpeg git repo
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Martin Storsjö f872b19714 aarch64: hevc: Produce plain neon versions of qpel_bi_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_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>
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_bi_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
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
.gitignore
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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
CONTRIBUTING.md
COPYING.GPLv2
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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.