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Martin Storsjö 5eb5aec475 arm: vp9itxfm: 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 12388 bytes to 19784 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_neon:     273.0    189.5    212.0    235.8
vp9_inv_dct_dct_16x16_sub2_add_neon:    2102.1   1521.7   1736.2   1265.8
vp9_inv_dct_dct_16x16_sub4_add_neon:    2104.5   1533.0   1736.6   1265.5
vp9_inv_dct_dct_16x16_sub8_add_neon:    2484.8   1828.7   2014.4   1506.5
vp9_inv_dct_dct_16x16_sub12_add_neon:   2851.2   2117.8   2294.8   1753.2
vp9_inv_dct_dct_16x16_sub16_add_neon:   3239.4   2408.3   2543.5   1994.9
vp9_inv_dct_dct_32x32_sub1_add_neon:     758.3    456.7    864.5    553.9
vp9_inv_dct_dct_32x32_sub2_add_neon:   10776.7   7949.8   8567.7   6819.7
vp9_inv_dct_dct_32x32_sub4_add_neon:   10865.6   8131.5   8589.6   6816.3
vp9_inv_dct_dct_32x32_sub8_add_neon:   12053.9   9271.3   9387.7   7564.0
vp9_inv_dct_dct_32x32_sub12_add_neon:  13328.3  10463.2  10217.0   8321.3
vp9_inv_dct_dct_32x32_sub16_add_neon:  14176.4  11509.5  11018.7   9062.3
vp9_inv_dct_dct_32x32_sub20_add_neon:  15301.5  12999.9  11855.1   9828.2
vp9_inv_dct_dct_32x32_sub24_add_neon:  16482.7  14931.5  12650.1  10575.0
vp9_inv_dct_dct_32x32_sub28_add_neon:  17589.5  15811.9  13482.8  11333.4
vp9_inv_dct_dct_32x32_sub32_add_neon:  18696.2  17049.2  14355.6  12089.7

After:
vp9_inv_dct_dct_16x16_sub1_add_neon:     273.0    189.5    211.7    235.8
vp9_inv_dct_dct_16x16_sub2_add_neon:    1203.5    998.2   1035.3    763.0
vp9_inv_dct_dct_16x16_sub4_add_neon:    1203.5    998.1   1035.5    760.8
vp9_inv_dct_dct_16x16_sub8_add_neon:    1926.1   1610.6   1722.1   1271.7
vp9_inv_dct_dct_16x16_sub12_add_neon:   2873.2   2129.7   2285.1   1757.3
vp9_inv_dct_dct_16x16_sub16_add_neon:   3221.4   2520.3   2557.6   2002.1
vp9_inv_dct_dct_32x32_sub1_add_neon:     753.0    457.5    866.6    554.6
vp9_inv_dct_dct_32x32_sub2_add_neon:    7554.6   5652.4   6048.4   4920.2
vp9_inv_dct_dct_32x32_sub4_add_neon:    7549.9   5685.0   6046.9   4925.7
vp9_inv_dct_dct_32x32_sub8_add_neon:    8336.9   6704.5   6604.0   5478.0
vp9_inv_dct_dct_32x32_sub12_add_neon:  10914.0   9777.2   9240.4   7416.9
vp9_inv_dct_dct_32x32_sub16_add_neon:  11859.2  11223.3   9966.3   8095.1
vp9_inv_dct_dct_32x32_sub20_add_neon:  15237.1  13029.4  11838.3   9829.4
vp9_inv_dct_dct_32x32_sub24_add_neon:  16293.2  14379.8  12644.9  10572.0
vp9_inv_dct_dct_32x32_sub28_add_neon:  17424.3  15734.7  13473.0  11326.9
vp9_inv_dct_dct_32x32_sub32_add_neon:  18531.3  17457.0  14298.6  12080.0

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

2017-02-09 12:32:00 +02:00

avbuild

build: Add version numbers to "Requires" entries in pkg-config files

2016-12-28 17:41:54 +01:00

compat

compat/atomics: add typecasts in atomic_compare_exchange_strong()

2016-12-08 15:53:58 -05:00

doc

lavc: deprecate refcounted_frames field

2017-02-01 10:47:46 +01:00

libavcodec

arm: vp9itxfm: Do a simpler half/quarter idct16/idct32 when possible

2017-02-09 12:32:00 +02:00

libavdevice

build: Generate pkg-config files from Make and not from configure

2016-12-22 12:30:54 +01:00

libavfilter

Mark some arrays that never change as const.

2017-02-01 10:42:59 +01:00

libavformat

Use bitstream_init8() where appropriate

2017-02-07 18:27:21 +01:00

libavresample

Mark some arrays that never change as const.

2017-02-01 10:42:59 +01:00

libavutil

asm: Consistently uppercase SECTION markers

2017-02-03 11:37:53 +01:00

libswscale

swscale-test: const correctness for pointer variable

2017-01-24 13:03:57 +01:00

presets

…

tests

fate: Skip the checkasm test if CONFIG_STATIC is disabled

2017-01-09 13:57:02 +02:00

tools

build: Move entries related to building TOOLS to a subdirectory Makefile

2016-12-07 11:02:31 +01:00

.gitattributes

…

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build: Ignore generated .version files

2017-02-03 11:37:53 +01:00

.travis.yml

travis: Enable OSX integration

2015-11-17 16:51:00 +01:00

avconv_dxva2.c

avconv_dxva2: add a profile check for hevc

2016-07-20 16:33:09 +02:00

avconv_filter.c

avconv: make sure the filtergraph is freed on init failure

2016-10-02 11:41:45 +02:00

avconv_opt.c

avconv: allow -b to be used with streamcopy

2017-02-01 10:42:59 +01:00

avconv_qsv.c

avconv_qsv: use the actual pixel format provided by lavc

2016-07-22 19:08:12 +02:00

avconv_vaapi.c

avconv_vaapi: Convert to use hw_frames_ctx only

2016-08-30 22:16:01 +01:00

avconv_vda.c

avconv: vda: Unlock the pixel buffer once it is accessed

2015-07-09 00:10:13 +02:00

avconv_vdpau.c

avconv_vdpau: use the hwcontext device creation API

2016-05-26 15:40:34 +02:00

avconv.c

avconv: allow -b to be used with streamcopy

2017-02-01 10:42:59 +01:00

avconv.h

avconv: allow -b to be used with streamcopy

2017-02-01 10:42:59 +01:00

avplay.c

Replace cmdutils_common_opts.h by a macro

2017-01-12 11:42:21 +01:00

avprobe.c

Replace cmdutils_common_opts.h by a macro

2017-01-12 11:42:21 +01:00

Changelog

vaapi_encode: Add VP8 support

2017-01-30 23:03:46 +00:00

cmdutils.c

cmdutils: update copyright year to 2017

2017-01-01 17:10:11 -05:00

cmdutils.h

Replace cmdutils_common_opts.h by a macro

2017-01-12 11:42:21 +01:00

configure

configure: Correctly recurse in do_check_deps()

2017-02-08 21:23:41 +01:00

COPYING.GPLv2

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COPYING.GPLv3

…

COPYING.LGPLv2.1

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COPYING.LGPLv3

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CREDITS

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INSTALL

…

LICENSE

Remove the legacy X11 screen grabber

2016-07-29 19:03:10 +02:00

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Replace cmdutils_common_opts.h by a macro

2017-01-12 11:42:21 +01:00

README

…

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

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.

Languages

C 90.3%

Assembly 7.8%

Makefile 1.3%

C++ 0.2%

Objective-C 0.2%

Other 0.1%