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Martin Storsjö 7e42d5f0ab aarch64: vp8: Optimize vp8_idct_add_neon for aarch64 
The previous version was a pretty exact translation of the arm
version. This version does do some unnecessary arithemetic (it does
more operations on vectors that are only half filled; it does 4
uaddw and 4 sqxtun instead of 2 of each), but it reduces the overhead
of packing data together (which could be done for free in the arm
version).

This gives a decent speedup on Cortex A53, a minor speedup on
A72 and a very minor slowdown on Cortex A73.

Before:        Cortex A53    A72    A73
vp8_idct_add_neon:   79.7   67.5   65.0
After:
vp8_idct_add_neon:   67.7   64.8   66.7

Signed-off-by: Martin Storsjö <martin@martin.st>
2019-02-19 11:46:28 +02:00
avbuild build: Rename OBJDIRS variable to OUTDIRS 2019-02-16 13:09:35 +01:00
avtools build: Rename OBJDIRS variable to OUTDIRS 2019-02-16 13:09:35 +01:00
compat w32pthreads: always use Vista+ API, drop XP support 2018-04-09 21:58:39 +02:00
doc build: Rename OBJDIRS variable to OUTDIRS 2019-02-16 13:09:35 +01:00
libavcodec aarch64: vp8: Optimize vp8_idct_add_neon for aarch64 2019-02-19 11:46:28 +02:00
libavdevice Remove dv1394 input device 2017-10-13 23:57:59 +02:00
libavfilter qsv: Error out if getting session handle failed in avfilter 2018-08-23 08:22:34 +02:00
libavformat srt: Set srto_sender flag to sender srt socket 2019-02-12 11:59:29 +01:00
libavresample Bump major versions of all libraries 2017-03-23 09:56:20 +01:00
libavutil arm: Create proper .rdata sections for COFF 2019-01-25 23:53:37 +02:00
libswscale swscale: Add GRAY10 2018-11-06 12:39:15 -03:00
presets presets: spelling error in libvpx 1080p50_60 2011-10-22 00:28:56 +02:00
tests tests: Add a convenience function for video-only lavf tests 2019-02-16 18:15:55 +01:00
tools build: Rename OBJDIRS variable to OUTDIRS 2019-02-16 13:09:35 +01:00
.gitattributes Treat all '*.pnm' files as non-text file 2014-11-28 17:52:43 -05:00
.gitignore build: Ignore generated .version files 2017-02-03 11:37:53 +01:00
.travis.yml Unbreak travis on macos 2019-02-19 10:05:10 +01:00
Changelog avcodec: libdav1d AV1 decoder wrapper. 2018-11-06 12:40:27 -03:00
configure libdav1d: update API usage to the first stable release 2018-12-12 19:56:16 -03:00
COPYING.GPLv2 Rename COPYING.GPL --> COPYING.GPLv2 and COPYING.LGPL --> COPYING.LGPLv2.1. 2009-06-05 09:51:31 +00:00
COPYING.GPLv3 Add configure option to upgrade (L)GPL to version 3. 2009-06-05 11:04:03 +00:00
COPYING.LGPLv2.1 cosmetics: Delete empty lines at end of file. 2012-02-09 12:26:45 +01:00
COPYING.LGPLv3 Add configure option to upgrade (L)GPL to version 3. 2009-06-05 11:04:03 +00:00
CREDITS partially rename FFmpeg to Libav 2011-03-16 21:54:39 +01:00
INSTALL doc: clarify configure features 2011-04-07 02:54:12 +02:00
LICENSE Remove the legacy X11 screen grabber 2016-07-29 19:03:10 +02:00
Makefile build: Rename OBJDIRS variable to OUTDIRS 2019-02-16 13:09:35 +01:00
README.md doc: Add travis badge 2015-09-14 00:19:08 +02:00
RELEASE Make the RELEASE file match with the most recent tag 2016-10-14 13:52:51 -04:00

README.md

Libav

Build Status

Libav 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.
  • libavresample implements audio mixing and resampling routines.
  • libswscale implements color conversion and scaling routines.

Tools

  • avconv is a command line toolbox to manipulate, convert and stream multimedia content.
  • avplay is a minimalistic multimedia player.
  • avprobe is a simple analisys 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

Conding examples are available in the doc/example directory.

License

Libav codebase is mainly LGPL-licensed with optional components licensed under GPL. Please refer to the LICENSE file for detailed information.