mirror of https://github.com/FFmpeg/FFmpeg.git synced 2026-06-19 19:03:00 +02:00

T

Martin Storsjö 32e273c111 arm: vp9itxfm16: Avoid reloading the idct32 coefficients

Keep the idct32 coefficients in narrow form in q6-q7, and idct16
coefficients in lengthened 32 bit form in q0-q3. Avoid clobbering
q0-q3 in the pass1 function, and squeeze the idct16 coefficients
into q0-q1 in the pass2 function to avoid reloading them.

The idct16 coefficients are clobbered and reloaded within idct32_odd
though, since that turns out to be faster than narrowing them and
swapping them into q6-q7.

Before:                            Cortex       A7        A8        A9      A53
vp9_inv_dct_dct_32x32_sub4_add_10_neon:    22653.8   18268.4   19598.0  14079.0
vp9_inv_dct_dct_32x32_sub32_add_10_neon:   37699.0   38665.2   32542.3  24472.2
After:
vp9_inv_dct_dct_32x32_sub4_add_10_neon:    22270.8   18159.3   19531.0  13865.0
vp9_inv_dct_dct_32x32_sub32_add_10_neon:   37523.3   37731.6   32181.7  24071.2

Signed-off-by: Martin Storsjö <martin@martin.st>

2017-03-19 22:53:57 +02:00

compat

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doc

Merge commit '963b3ab11f98fcc4a311f0dc7b268890c5675da2'

2017-03-19 18:34:48 +01:00

libavcodec

arm: vp9itxfm16: Avoid reloading the idct32 coefficients

2017-03-19 22:53:57 +02:00

libavdevice

Merge commit '93fed46a92bab8be176d3e67be4354189a8dbe7f'

2017-03-19 16:08:27 +01:00

libavfilter

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libavformat

Merge commit 'd42809f9835a4e9e5c7c63210abb09ad0ef19cfb'

2017-03-19 18:28:40 +01:00

libavresample

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libavutil

lavu/mathematics: split closing bracket out of ifdefery

2017-03-18 23:50:05 +01:00

libpostproc

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libswresample

swresample/x86/resample: extend resample_double to support avx and fma3

2017-03-19 12:24:41 +07:00

libswscale

Merge commit 'aa37d2bf4505afc106e2a23c44afc722bb204a8e'

2017-03-19 15:40:03 +01:00

presets

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tests

Merge commit '87c6c78604e4dd16f1f45862b27ca006da010527'

2017-03-19 15:11:44 -03:00

tools

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.gitattributes

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.gitignore

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.travis.yml

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arch.mak

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Changelog

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cmdutils_common_opts.h

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cmdutils_opencl.c

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cmdutils.c

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cmdutils.h

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common.mak

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configure

Merge commit '46e3936fb04d06550151e667357065e3f646da1a'

2017-03-19 18:21:56 +01:00

CONTRIBUTING.md

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COPYING.GPLv2

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COPYING.GPLv3

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COPYING.LGPLv2.1

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COPYING.LGPLv3

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CREDITS

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ffmpeg_cuvid.c

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ffmpeg_dxva2.c

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ffmpeg_filter.c

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ffmpeg_opt.c

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ffmpeg_qsv.c

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ffmpeg_vaapi.c

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ffmpeg_vdpau.c

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ffmpeg_videotoolbox.c

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ffmpeg.c

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ffmpeg.h

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ffplay.c

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ffprobe.c

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ffserver_config.c

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ffserver_config.h

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ffserver.c

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INSTALL.md

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library.mak

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LICENSE.md

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MAINTAINERS

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Makefile

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README.md

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RELEASE

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version.sh

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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 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.