mirror of https://github.com/FFmpeg/FFmpeg.git synced 2025-08-10 06:10:52 +02:00

Go to file

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

compat/atomics: rename header guards

2016-12-02 20:08:54 -03:00

doc

lavfi/buffersink: add accessors for the stream properties.

2017-01-12 14:06:16 +01:00

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

lavd/lavfi: use buffersink accessors.

2017-01-12 14:06:16 +01:00

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

Bump minor versions after 3.2 branchpoint to seperate release

2016-10-26 20:52:42 +02:00

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

Bump minor versions after 3.2 branchpoint to seperate release

2016-10-26 20:52:42 +02:00

libswresample

swresample/arm: cosmetic fixes

2017-01-13 21:24:25 +01:00

libswscale

swscale/swscale: Fix dereference of stride array before null check

2016-12-23 21:47:47 +01:00

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

tools/zmqsend: Do not truncate fgetc() return

2016-12-24 14:46:25 +01:00

.gitattributes

Treat all '*.pnm' files as non-text file

2014-11-28 17:52:43 -05:00

.gitignore

Merge commit '6641819feedb086ebba3d2be89b8d33980f367e1'

2016-06-26 15:43:05 +02:00

.travis.yml

Merge commit 'eda183287489b2c705843aa373a19c4e46fb2fec'

2015-11-22 17:12:24 +00:00

arch.mak

mips: rename mipsdspr1 to mipsdsp

2015-12-04 02:35:42 +01:00

Changelog

avcodec: add Newtek SpeedHQ decoder

2017-01-11 16:02:10 +01:00

cmdutils_common_opts.h

cmdutils: add show_demuxers and show_muxers

2016-11-08 01:56:31 +01:00

cmdutils_opencl.c

cmdutils_opencl: fix resource_leak cid 1396852

2017-01-13 07:54:49 +08:00

cmdutils.c

cmdutils: remove duplicate windows.h include

2016-11-16 15:06:16 +01:00

cmdutils.h

cmdutils: add show_demuxers and show_muxers

2016-11-08 01:56:31 +01:00

common.mak

Merge commit 'c5fd4b50610f62cbb3baa4f4108139363128dea1'

2016-06-27 19:39:46 +02:00

configure

huffyuvencdsp: move shared functions to a new lossless_videoencdsp context

2017-01-12 22:53:04 -03:00

CONTRIBUTING.md

Add CONTRIBUTING.md

2016-09-18 10:02:13 +01:00

COPYING.GPLv2

…

COPYING.GPLv3

…

COPYING.LGPLv2.1

…

COPYING.LGPLv3

…

CREDITS

…

ffmpeg_cuvid.c

doc: fix spelling errors

2016-10-21 23:58:47 +02:00

ffmpeg_dxva2.c

Merge commit '18c506e9e6e8df8b1d496d093077b8240ea68c28'

2016-06-26 15:34:01 +02:00

ffmpeg_filter.c

ffmpeg: use buffersink accessors.

2017-01-12 14:06:16 +01:00

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: Add an option "qsv_device" to choose proper node for QSV child device (vaapi or dxva2)

2017-01-11 20:21:09 +00:00

ffmpeg_vaapi.c

ffmpeg_vaapi: fix choice of decoder_format

2016-09-29 01:23:52 +02:00

ffmpeg_vdpau.c

Merge commit 'f72db3f2f3a8c83a4f5dede8fa03434b2bf676c6'

2016-06-26 15:29:39 +02:00

ffmpeg_videotoolbox.c

ffmpeg/videotoolbox: protect UTGetOSTypeFromString on both VDA and VT

2015-10-15 10:22:31 +02:00

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

ffplay.c

ffplay: use buffersink accessors.

2017-01-12 14:06:16 +01:00

ffprobe.c

lavc: Add spherical packet side data API

2016-12-07 14:40:06 -05:00

ffserver_config.c

ffserver_config: Check for failure to allocate FFServerIPAddressACL

2016-12-22 19:23:08 +01:00

ffserver_config.h

ffsrever: Make the status page bitexact if any stream is bitexact

2016-11-29 19:26:26 +01:00

ffserver.c

ffserver: local OOB write with custom program name

2017-01-08 03:50:56 +01:00

INSTALL.md

…

library.mak

Merge commit 'c5fd4b50610f62cbb3baa4f4108139363128dea1'

2016-06-27 19:39:46 +02:00

LICENSE.md

lavfi/f_ebur128: relicense to LGPL

2016-11-27 20:46:20 +01:00

MAINTAINERS

MAINTAINERS: update

2016-12-27 18:24:31 +01:00

Makefile

Merge commit '6641819feedb086ebba3d2be89b8d33980f367e1'

2016-06-26 15:43:05 +02:00

README.md

Add CONTRIBUTING.md

2016-09-18 10:02:13 +01:00

RELEASE

RELEASE: Update for past 3.2 branch

2016-10-26 20:52:43 +02:00

version.sh

version.sh: Fix spurious rebuilds.

2016-03-10 09:53:10 +01:00

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 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.

Languages

C 90.1%

Assembly 7.9%

Makefile 1.3%

C++ 0.2%

Objective-C 0.2%

Other 0.1%