FFmpeg git repo

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Martin Storsjö ceb36b8178 aarch64: Add NEON optimizations for 10 and 12 bit vp9 itxfm This work is sponsored by, and copyright, Google. Compared to the arm version, on aarch64 we can keep the full 8x8 transform in registers, and for 16x16 and 32x32, we can process it in slices of 4 pixels instead of 2. Examples of runtimes vs the 32 bit version, on a Cortex A53: ARM AArch64 vp9_inv_adst_adst_4x4_sub4_add_10_neon: 111.0 109.7 vp9_inv_adst_adst_8x8_sub8_add_10_neon: 914.0 733.5 vp9_inv_adst_adst_16x16_sub16_add_10_neon: 5184.0 3745.7 vp9_inv_dct_dct_4x4_sub1_add_10_neon: 65.0 65.7 vp9_inv_dct_dct_4x4_sub4_add_10_neon: 100.0 96.7 vp9_inv_dct_dct_8x8_sub1_add_10_neon: 111.0 119.7 vp9_inv_dct_dct_8x8_sub8_add_10_neon: 618.0 494.7 vp9_inv_dct_dct_16x16_sub1_add_10_neon: 295.1 284.6 vp9_inv_dct_dct_16x16_sub2_add_10_neon: 2303.2 1883.9 vp9_inv_dct_dct_16x16_sub8_add_10_neon: 2984.8 2189.3 vp9_inv_dct_dct_16x16_sub16_add_10_neon: 3890.0 2799.4 vp9_inv_dct_dct_32x32_sub1_add_10_neon: 1044.4 1012.7 vp9_inv_dct_dct_32x32_sub2_add_10_neon: 13333.7 9695.1 vp9_inv_dct_dct_32x32_sub16_add_10_neon: 18531.3 12459.8 vp9_inv_dct_dct_32x32_sub32_add_10_neon: 24470.7 16160.2 vp9_inv_wht_wht_4x4_sub4_add_10_neon: 83.0 79.7 The larger transforms are significantly faster than the corresponding ARM versions. The speedup vs C code is smaller than in 32 bit mode, probably because the 64 bit intermediates in the C code can be expressed more efficiently in aarch64. Signed-off-by: Martin Storsjö <martin@martin.st>		2017-01-24 22:36:08 +02:00
compat	…
doc	avfilter: add EIA-608 line extractor	2017-01-24 10:20:10 +01:00
libavcodec	aarch64: Add NEON optimizations for 10 and 12 bit vp9 itxfm	2017-01-24 22:36:08 +02:00
libavdevice	…
libavfilter	avfilter: add EIA-608 line extractor	2017-01-24 10:20:10 +01:00
libavformat	avformat/hlsenc: improve to write m3u8 head block	2017-01-24 22:25:29 +08:00
libavresample	…
libavutil	hwcontext_cuda: implement frames_get_constraints	2017-01-23 16:21:18 +01:00
libpostproc	…
libswresample	…
libswscale	…
presets	…
tests	Merge commit '71a0472114574993df7035f4de9aa007e03817b8'	2017-01-24 19:21:29 +01:00
tools	…
.gitattributes	…
.gitignore	…
.travis.yml	…
CONTRIBUTING.md	…
COPYING.GPLv2	…
COPYING.GPLv3	…
COPYING.LGPLv2.1	…
COPYING.LGPLv3	…
CREDITS	…
Changelog	avfilter: add EIA-608 line extractor	2017-01-24 10:20:10 +01:00
INSTALL.md	…
LICENSE.md	…
MAINTAINERS	dxva2: allow an empty array of ID3D11VideoDecoderOutputView	2017-01-16 02:54:04 +01:00
Makefile	…
README.md	…
RELEASE	…
arch.mak	…
cmdutils.c	…
cmdutils.h	…
cmdutils_common_opts.h	…
cmdutils_opencl.c	…
common.mak	…
configure	vaapi_hevc: Convert to use the new VAAPI hwaccel code	2017-01-17 23:06:46 +00:00
ffmpeg.c	ffmpeg: pass output stream duration as a hint to the muxer	2017-01-19 01:54:49 +01:00
ffmpeg.h	…
ffmpeg_cuvid.c	…
ffmpeg_dxva2.c	…
ffmpeg_filter.c	…
ffmpeg_opt.c	…
ffmpeg_qsv.c	…
ffmpeg_vaapi.c	ffmpeg_vaapi: Convert to use hw_frames_ctx only	2017-01-17 23:06:46 +00:00
ffmpeg_vdpau.c	…
ffmpeg_videotoolbox.c	…
ffplay.c	ffplay: fix indentation after last commit	2017-01-22 16:17:50 +01:00
ffprobe.c	…
ffserver.c	…
ffserver_config.c	…
ffserver_config.h	…
library.mak	…
version.sh	…

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 a mean to alter decoded Audio and Video through chain of 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.
ffserver is a multimedia streaming server for live broadcasts.
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.