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Martin Storsjö 8b11a89c06 aarch64: vp9itxfm: Skip empty slices in the first pass of idct_idct 16x16 and 32x32 This work is sponsored by, and copyright, Google. Previously all subpartitions except the eob=1 (DC) case ran with the same runtime: vp9_inv_dct_dct_16x16_sub16_add_neon: 1373.2 vp9_inv_dct_dct_32x32_sub32_add_neon: 8089.0 By skipping individual 8x16 or 8x32 pixel slices in the first pass, we reduce the runtime of these functions like this: vp9_inv_dct_dct_16x16_sub1_add_neon: 235.3 vp9_inv_dct_dct_16x16_sub2_add_neon: 1036.7 vp9_inv_dct_dct_16x16_sub4_add_neon: 1036.7 vp9_inv_dct_dct_16x16_sub8_add_neon: 1036.7 vp9_inv_dct_dct_16x16_sub12_add_neon: 1372.1 vp9_inv_dct_dct_16x16_sub16_add_neon: 1372.1 vp9_inv_dct_dct_32x32_sub1_add_neon: 555.1 vp9_inv_dct_dct_32x32_sub2_add_neon: 5190.2 vp9_inv_dct_dct_32x32_sub4_add_neon: 5180.0 vp9_inv_dct_dct_32x32_sub8_add_neon: 5183.1 vp9_inv_dct_dct_32x32_sub12_add_neon: 6161.5 vp9_inv_dct_dct_32x32_sub16_add_neon: 6155.5 vp9_inv_dct_dct_32x32_sub20_add_neon: 7136.3 vp9_inv_dct_dct_32x32_sub24_add_neon: 7128.4 vp9_inv_dct_dct_32x32_sub28_add_neon: 8098.9 vp9_inv_dct_dct_32x32_sub32_add_neon: 8098.8 I.e. in general a very minor overhead for the full subpartition case due to the additional cmps, but a significant speedup for the cases when we only need to process a small part of the actual input data. This is cherrypicked from libav commits `cad42fadcd` and `a0c443a398`. Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>		2017-01-14 21:13:32 +01:00
compat	…
doc	…
libavcodec	aarch64: vp9itxfm: Skip empty slices in the first pass of idct_idct 16x16 and 32x32	2017-01-14 21:13:32 +01:00
libavdevice	…
libavfilter	libavfilter/af_biquads: warn about clipping only after frame with clipping	2017-01-12 19:52:29 +01:00
libavformat	Cosmetics: Reindent after last commit.	2017-01-14 06:07:06 +01:00
libavresample	…
libavutil	avutil/tests/audio_fifo.c: pass by reference for efficiency and change datatype to const	2017-01-13 00:17:10 +01:00
libpostproc	…
libswresample	swresample/arm: cosmetic fixes	2017-01-13 21:24:25 +01:00
libswscale	…
presets	…
tests	arm: vp9itxfm: Skip empty slices in the first pass of idct_idct 16x16 and 32x32	2017-01-14 21:13:30 +01:00
tools	…
.gitattributes	…
.gitignore	…
.travis.yml	…
CONTRIBUTING.md	…
COPYING.GPLv2	…
COPYING.GPLv3	…
COPYING.LGPLv2.1	…
COPYING.LGPLv3	…
CREDITS	…
Changelog	…
INSTALL.md	…
LICENSE.md	…
MAINTAINERS	…
Makefile	…
README.md	…
RELEASE	…
arch.mak	…
cmdutils.c	…
cmdutils.h	…
cmdutils_common_opts.h	…
cmdutils_opencl.c	cmdutils_opencl: fix resource_leak cid 1396852	2017-01-13 07:54:49 +08:00
common.mak	…
configure	huffyuvencdsp: move shared functions to a new lossless_videoencdsp context	2017-01-12 22:53:04 -03:00
ffmpeg.c	ffmpeg: Add -time_base option to hint the time base	2017-01-14 20:03:56 +01:00
ffmpeg.h	ffmpeg: Add -time_base option to hint the time base	2017-01-14 20:03:56 +01:00
ffmpeg_cuvid.c	…
ffmpeg_dxva2.c	…
ffmpeg_filter.c	…
ffmpeg_opt.c	ffmpeg: Add -time_base option to hint the time base	2017-01-14 20:03:56 +01:00
ffmpeg_qsv.c	…
ffmpeg_vaapi.c	…
ffmpeg_vdpau.c	…
ffmpeg_videotoolbox.c	…
ffplay.c	…
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.