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0e52a4e434
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Stone Chen 0e52a4e434 libavcodec/x86/vvc: Add AVX2 DMVR SAD functions for VVC 
Implements AVX2 DMVR (decoder-side motion vector refinement) SAD functions. DMVR SAD is only calculated if w >= 8, h >= 8, and w * h > 128. To reduce complexity, SAD is only calculated on even rows. This is calculated for all video bitdepths, but the values passed to the function are always 16bit (even if the original video bitdepth is 8). The AVX2 implementation uses min/max/sub.

Additionally this changes parameters dx and dy from int to intptr_t. This allows dx & dy to be used as pointer offsets without needing to use movsxd.

Benchmarks ( AMD 7940HS )
Before:
BQTerrace_1920x1080_60_10_420_22_RA.vvc | 106.0 |
Chimera_8bit_1080P_1000_frames.vvc | 204.3 |
NovosobornayaSquare_1920x1080.bin | 197.3 |
RitualDance_1920x1080_60_10_420_37_RA.266 | 174.0 |

After:
BQTerrace_1920x1080_60_10_420_22_RA.vvc | 109.3 |
Chimera_8bit_1080P_1000_frames.vvc | 216.0 |
NovosobornayaSquare_1920x1080.bin | 204.0|
RitualDance_1920x1080_60_10_420_37_RA.266 | 181.7 |

Reviewed-by: Ronald S. Bultje <rsbultje@gmail.com>
Signed-off-by: James Almer <jamrial@gmail.com>
2024-05-22 20:36:21 -03:00
compat avutil/common: Don't auto-include mem.h 2024-03-31 00:08:43 +01:00
doc lavu/hwcontext_qsv: update AVQSVFramesContext to support dynamic frame pool 2024-05-20 09:30:48 +08:00
ffbuild riscv: add Zvbb vector bit manipulation extension 2024-05-11 11:38:49 +03:00
fftools fftools/ffmpeg_filter: Fix leak on error 2024-05-20 14:15:23 +02:00
libavcodec libavcodec/x86/vvc: Add AVX2 DMVR SAD functions for VVC 2024-05-22 20:36:21 -03:00
libavdevice lavd/v4l2: Use proper field type for second parameter of ioctl() with BSD's 2024-05-08 21:33:32 +02:00
libavfilter avfilter/vf_dnn_detect: Fix null pointer dereference 2024-05-21 18:17:07 +08:00
libavformat avformat/mov: store sample_sizes as unsigned ints 2024-05-22 17:46:49 -03:00
libavutil avutil/hwcontext_qsv: fix GCC 14.1 warnings 2024-05-21 16:57:46 +08:00
libpostproc avutil/common: Don't auto-include mem.h 2024-03-31 00:08:43 +01:00
libswresample avutil/common: Don't auto-include mem.h 2024-03-31 00:08:43 +01:00
libswscale swscale/riscv: explicitly require Zbb for MIN 2024-05-10 18:59:06 +03:00
presets
tests avformat/vvc: initialize some ptl flags 2024-05-22 17:46:49 -03:00
tools tools/target_enc_fuzzer: Only read pix_fmts if its set 2024-05-09 16:17:39 +02:00
.gitattributes
.gitignore
.mailmap
Changelog Changelog: add DVB compatible information for VVC decoder 2024-05-21 20:20:25 +08:00
configure configure: split ISOBMFF writer helpers into a separate component 2024-05-18 13:21:35 -03:00
CONTRIBUTING.md
COPYING.GPLv2
COPYING.GPLv3
COPYING.LGPLv2.1
COPYING.LGPLv3
CREDITS
INSTALL.md
LICENSE.md
MAINTAINERS MAINTAINERS: add myself as *BSD maintainer 2024-05-13 03:40:16 +02:00
Makefile riscv: add Zvbb vector bit manipulation extension 2024-05-11 11:38:49 +03:00
README.md
RELEASE RELEASE: update after 7.0 branch 2024-04-02 13:02:39 -03:00

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.