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Martin Storsjö eabc5abf94 arm: vp9itxfm16: Do a simpler half/quarter idct16/idct32 when possible 
This work is sponsored by, and copyright, Google.

This avoids loading and calculating coefficients that we know will
be zero, and avoids filling the temp buffer with zeros in places
where we know the second pass won't read.

This gives a pretty substantial speedup for the smaller subpartitions.

The code size increases from 14516 bytes to 22484 bytes.

The idct16/32_end macros are moved above the individual functions; the
instructions themselves are unchanged, but since new functions are added
at the same place where the code is moved from, the diff looks rather
messy.

Before:                                 Cortex A7       A8       A9      A53
vp9_inv_dct_dct_16x16_sub1_add_10_neon:     454.0    270.7    418.5    295.4
vp9_inv_dct_dct_16x16_sub2_add_10_neon:    3840.2   3244.8   3700.1   2337.9
vp9_inv_dct_dct_16x16_sub4_add_10_neon:    4212.5   3575.4   3996.9   2571.6
vp9_inv_dct_dct_16x16_sub8_add_10_neon:    5174.4   4270.5   4615.5   3031.9
vp9_inv_dct_dct_16x16_sub12_add_10_neon:   5676.0   4908.5   5226.5   3491.3
vp9_inv_dct_dct_16x16_sub16_add_10_neon:   6403.9   5589.0   5839.8   3948.5
vp9_inv_dct_dct_32x32_sub1_add_10_neon:    1710.7    944.7   1582.1   1045.4
vp9_inv_dct_dct_32x32_sub2_add_10_neon:   21040.7  16706.1  18687.7  13193.1
vp9_inv_dct_dct_32x32_sub4_add_10_neon:   22197.7  18282.7  19577.5  13918.6
vp9_inv_dct_dct_32x32_sub8_add_10_neon:   24511.5  20911.5  21472.5  15367.5
vp9_inv_dct_dct_32x32_sub12_add_10_neon:  26939.5  24264.3  23239.1  16830.3
vp9_inv_dct_dct_32x32_sub16_add_10_neon:  29419.5  26845.1  25020.6  18259.9
vp9_inv_dct_dct_32x32_sub20_add_10_neon:  31146.4  29633.5  26803.3  19721.7
vp9_inv_dct_dct_32x32_sub24_add_10_neon:  33376.3  32507.8  28642.4  21174.2
vp9_inv_dct_dct_32x32_sub28_add_10_neon:  35629.4  35439.6  30416.5  22625.7
vp9_inv_dct_dct_32x32_sub32_add_10_neon:  37269.9  37914.9  32271.9  24078.9

After:
vp9_inv_dct_dct_16x16_sub1_add_10_neon:     454.0    276.0    418.5    295.1
vp9_inv_dct_dct_16x16_sub2_add_10_neon:    2336.2   1886.0   2251.0   1458.6
vp9_inv_dct_dct_16x16_sub4_add_10_neon:    2531.0   2054.7   2402.8   1591.1
vp9_inv_dct_dct_16x16_sub8_add_10_neon:    3848.6   3491.1   3845.7   2554.8
vp9_inv_dct_dct_16x16_sub12_add_10_neon:   5703.8   4831.6   5230.8   3493.4
vp9_inv_dct_dct_16x16_sub16_add_10_neon:   6399.5   5567.0   5832.4   3951.5
vp9_inv_dct_dct_32x32_sub1_add_10_neon:    1722.1    938.5   1577.3   1044.5
vp9_inv_dct_dct_32x32_sub2_add_10_neon:   15003.5  11576.8  13105.8   9602.2
vp9_inv_dct_dct_32x32_sub4_add_10_neon:   15768.5  12677.2  13726.0  10138.1
vp9_inv_dct_dct_32x32_sub8_add_10_neon:   17278.8  14825.4  14907.5  11185.7
vp9_inv_dct_dct_32x32_sub12_add_10_neon:  22335.7  21544.5  20379.5  15019.8
vp9_inv_dct_dct_32x32_sub16_add_10_neon:  24165.6  23881.7  21938.6  16308.2
vp9_inv_dct_dct_32x32_sub20_add_10_neon:  31082.2  30860.9  26835.3  19711.3
vp9_inv_dct_dct_32x32_sub24_add_10_neon:  33102.6  31922.8  28638.3  21161.0
vp9_inv_dct_dct_32x32_sub28_add_10_neon:  35104.9  34867.5  30411.7  22621.2
vp9_inv_dct_dct_32x32_sub32_add_10_neon:  37438.1  39103.4  32217.8  24067.6

Signed-off-by: Martin Storsjö <martin@martin.st>
2017-03-19 22:54:33 +02:00
compat compat/atomics/gcc: use __typeof__ instead of typeof 2017-03-18 12:13:46 -03:00
doc Merge commit '963b3ab11f98fcc4a311f0dc7b268890c5675da2' 2017-03-19 18:34:48 +01:00
libavcodec arm: vp9itxfm16: Do a simpler half/quarter idct16/idct32 when possible 2017-03-19 22:54:33 +02:00
libavdevice Merge commit '93fed46a92bab8be176d3e67be4354189a8dbe7f' 2017-03-19 16:08:27 +01:00
libavfilter lavfi: deprecate AVFilterGraph->resample_lavr_opts 2017-03-18 07:37:35 +00:00
libavformat Merge commit 'd42809f9835a4e9e5c7c63210abb09ad0ef19cfb' 2017-03-19 18:28:40 +01:00
libavresample Bump minor versions after 3.2 branchpoint to seperate release 2016-10-26 20:52:42 +02:00
libavutil lavu/mathematics: split closing bracket out of ifdefery 2017-03-18 23:50:05 +01:00
libpostproc Bump minor versions after 3.2 branchpoint to seperate release 2016-10-26 20:52:42 +02:00
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 presets: remove moldering iPod presets 2014-06-17 16:15:04 -08:00
tests Merge commit '87c6c78604e4dd16f1f45862b27ca006da010527' 2017-03-19 15:11:44 -03:00
tools tools/target_dec_fuzzer: Fix misaligned read 2017-02-24 14:12:13 +01:00
.gitattributes fate: add SCC test 2017-01-27 17:06:42 +01:00
.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 Merge commit '4fef648d10bf3bcfd4b8fa5755c1128966a2427c' 2017-03-15 22:07:47 +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 Merge commit '46e3936fb04d06550151e667357065e3f646da1a' 2017-03-19 18:21:56 +01:00
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 ffmpeg_cuvid: adapt for recent filter graph initialization changes 2017-03-03 08:45:43 +01:00
ffmpeg_dxva2.c Merge commit '18c506e9e6e8df8b1d496d093077b8240ea68c28' 2016-06-26 15:34:01 +02:00
ffmpeg_filter.c ffmpeg: don't use resample_lavr_opts 2017-03-16 06:58:50 +00:00
ffmpeg_opt.c ffmpeg, ffprobe: don't "merge" side data into packet data by default 2017-03-14 23:37:28 +01:00
ffmpeg_qsv.c ffmpeg: init filtergraphs only after we have a frame on each input 2017-03-03 08:45:43 +01:00
ffmpeg_vaapi.c ffmpeg_vaapi: Always set hwaccel_ctx, so it gets properly cleaned up on error 2017-02-05 15:13:15 +00:00
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: set the encoding framerate when the output is CFR 2017-03-17 11:54:38 +01:00
ffmpeg.h Merge commit 'b0f36a0043d76436cc7ab8ff92ab99c94595d3c0' 2017-03-12 13:08:04 +01:00
ffplay.c ffplay: change keyboard volume control to logarithmic 2017-02-08 22:36:42 +01:00
ffprobe.c fate: Do not report side data size 2017-03-17 13:12:25 -04:00
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 INSTALL: add markdown syntax 2014-05-28 22:38:38 +02:00
library.mak Merge commit 'c5fd4b50610f62cbb3baa4f4108139363128dea1' 2016-06-27 19:39:46 +02:00
LICENSE.md Merge commit '4fef648d10bf3bcfd4b8fa5755c1128966a2427c' 2017-03-15 22:07:47 +01:00
MAINTAINERS MAINTAINERS: Add Rodger Combs to ffmpeg-security 2017-02-28 01:13:52 +01:00
Makefile Makefile: Clean compat/atomics/pthread subdirectory. 2017-03-01 13:43:03 +01:00
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.