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51 Commits

Author SHA1 Message Date
Shreesh Adiga
5085432f8b avutil/crc: add aarch64 NEON PMULL+EOR3 SIMD implementation for av_crc 
Implemented clmul algorithm for aarch64 using PMULL and EOR3 instructions.
The logic and structure is same as x86 clmul implementation with
slight rearrangement of constants as per PMULL and PMULL2 instructions.

Benchmarking in Android (Termux) on a MediaTek Dimensity 9400 SoC:

./tests/checkasm/checkasm --test=crc --bench --runs=12
benchmarking with native FFmpeg timers
nop: 0.2
checkasm: SVE 128 bits, using random seed 2502847808
checkasm: bench runs 4096 (1 << 12)
CRC:
 - crc.crc [OK]
PMULL:
 - crc.crc [OK]
checkasm: all 10 tests passed
crc_8_ATM_c:                                            26.0 ( 1.00x)
crc_8_ATM_pmull_eor3:                                    0.7 (37.17x)
crc_8_EBU_c:                                            46.4 ( 1.00x)
crc_8_EBU_pmull_eor3:                                    1.5 (31.47x)
crc_16_ANSI_c:                                          36.3 ( 1.00x)
crc_16_ANSI_pmull_eor3:                                  1.1 (31.70x)
crc_16_ANSI_LE_c:                                       90.9 ( 1.00x)
crc_16_ANSI_LE_pmull_eor3:                               2.8 (32.30x)
crc_16_CCITT_c:                                        118.0 ( 1.00x)
crc_16_CCITT_pmull_eor3:                                 3.7 (32.00x)
crc_24_IEEE_c:                                           1.6 ( 1.00x)
crc_24_IEEE_pmull_eor3:                                  0.1 (12.19x)
crc_32_IEEE_c:                                          45.2 ( 1.00x)
crc_32_IEEE_pmull_eor3:                                  1.4 (31.39x)
crc_32_IEEE_LE_c:                                       49.1 ( 1.00x)
crc_32_IEEE_LE_crc:                                      2.5 (19.51x)
crc_32_IEEE_LE_pmull_eor3:                               1.5 (32.84x)
crc_custom_polynomial_c:                                45.3 ( 1.00x)
crc_custom_polynomial_pmull_eor3:                        1.3 (35.16x)
 2026-03-11 14:03:36 +00:00
Zhao Zhili
66f7e9db71 avutil/crc: use arm64 crc32 instruction 
On rpi5 A76
crc_32_ieee_le_c:                       23146.3 ( 1.00x)
crc_32_ieee_le_crc:                      1060.1 (21.83x)

On RK3566 A55
crc_32_ieee_le_c:                       28773.8 ( 1.00x)
crc_32_ieee_le_crc:                      2602.4 (11.06x)

Co-authored-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
 2026-01-04 15:49:30 +01:00
Andreas Rheinhardt
dc03cffe9c avutil/crc: Use x86 clmul for CRC when available 
Observed near 10x speedup on AMD Zen4 7950x:
av_crc_c:                                            22057.0 ( 1.00x)
av_crc_clmul:                                         2202.8 (10.01x)

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
 2026-01-04 15:49:30 +01:00
Andreas Rheinhardt
52190efade avutil/crc: Don't assert AVCRCId to be valid 
This function is supposed to return NULL on failure.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
 2026-01-04 15:49:30 +01:00
Andreas Rheinhardt
636631d9db Remove unnecessary libavutil/(avutil|common|internal).h inclusions 
Some of these were made possible by moving several common macros to
libavutil/macros.h.

While just at it, also improve the other headers a bit.

Reviewed-by: Martin Storsjö <martin@martin.st>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
 2022-02-24 12:56:49 +01:00
Aurelien Jacobs
0b4ad86959 crc: add AV_CRC_8_SBC as a 8 bits CRC with polynomial 0x1D 2018-03-07 22:26:53 +01:00
Muhammad Faiz
8329ae781a avutil/crc: use ff_thread_once at av_crc_get_table 
Fix tsan warnings.

Signed-off-by: Muhammad Faiz <mfcc64@gmail.com>
 2017-11-14 06:25:05 +07:00
Derek Buitenhuis
96d616052b Merge commit 'd12b5b2f135aade4099f4b26b0fe678656158c13' 
* commit 'd12b5b2f135aade4099f4b26b0fe678656158c13':
  build: Split test programs off into separate files

Some conversions done by: James Almer <jamrial@gmail.com>
Merged-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>
 2016-05-11 19:13:03 +01:00
Derek Buitenhuis
5f587b1daf Merge commit '3b08d9d932eef09403074d5af31e10d8011e840b' 
* commit '3b08d9d932eef09403074d5af31e10d8011e840b':
  testprogs: K&R formatting cosmetics

Merged-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>
 2016-04-21 16:50:06 +01:00
Diego Biurrun
d12b5b2f13 build: Split test programs off into separate files 
This avoids spurious library rebuilds when only the test program
code is changed and simplifies the build system.
 2016-04-07 16:14:42 +02:00
Diego Biurrun
3b08d9d932 testprogs: K&R formatting cosmetics 2016-03-24 21:45:07 +01:00
Michael Niedermayer
d6f6e98eb1 avutil/crc: use EINVAL instead of -1 for the return code of av_crc_init() 
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
 2015-10-16 03:24:36 +02:00
Michael Niedermayer
d1dce1c517 avutil/crc: Fix type of p table so its content fits without overflwoing 
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2015-06-19 02:25:48 +02:00
Michael Niedermayer
a8d01a7378 Merge commit '0983d48111f578e17e8c1967d25ce593fce62b63' 
* commit '0983d48111f578e17e8c1967d25ce593fce62b63':
  crc: add ANSI CRC16 LE

Conflicts:
	doc/APIchanges
	libavutil/crc.c
	libavutil/crc.h
	libavutil/version.h
	tests/ref/fate/crc

Merged-by: Michael Niedermayer <michaelni@gmx.at>
 2014-04-17 22:38:51 +02:00
Alessandro Ghedini
0983d48111 crc: add ANSI CRC16 LE 
This adds the reversed byte-order version of the ANSI CRC16.

Signed-off-by: Anton Khirnov <anton@khirnov.net>
 2014-04-17 20:08:19 +02:00
Paul B Mahol
410192e369 add crc24 tables 
Signed-off-by: Paul B Mahol <onemda@gmail.com>
 2013-07-10 12:07:53 +00:00
James Almer
c485c835fe avutil/crc: Dont limit CRC32 standard tables 
Currently, standard tables like AV_CRC_32_IEEE and such are being generated (or
provided in case the user compiles with hardcoded tables) with only 257 elements.
We're missing a considerable boost in performance by not making them with a size
of 1024 elements instead.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2013-06-01 10:53:39 +02:00
Michael Niedermayer
e2b703f536 Merge commit '62a43d30cc3b9b2460f2c926beb522df32493625' 
* commit '62a43d30cc3b9b2460f2c926beb522df32493625':
  crc: Move static data table from header to .c file
  avcodec/rectangle: Remove nonsense assert

Conflicts:
	libavcodec/rectangle.h
	libavutil/crc_data.h

The assert is not removed as the assert ensures clear and easy
to debug failures instead of undefined behavior in case of
misalignment.

Merged-by: Michael Niedermayer <michaelni@gmx.at>
 2013-02-12 13:11:14 +01:00
Diego Biurrun
62a43d30cc crc: Move static data table from header to .c file 
Having static data tables in header files is a potential source of trouble.
 2013-02-11 16:48:44 +01:00
Michael Niedermayer
99efd59626 Merge commit 'cb45553f577f8e0ebfe05d3287e1b6fa5859b967' 
* commit 'cb45553f577f8e0ebfe05d3287e1b6fa5859b967':
  Remove pointless #undefs of previously forbidden functions.
  fate: Add dependencies for bmp, cdxl, dfa, mp3

Conflicts:
	doc/examples/muxing.c
	libavfilter/filtfmts.c
	libavutil/des.c
	libavutil/eval.c
	libavutil/log.c
	libavutil/parseutils.c
	tests/fate/mp3.mak

Merged-by: Michael Niedermayer <michaelni@gmx.at>
 2012-12-05 13:34:45 +01:00
Anton Khirnov
cb45553f57 Remove pointless #undefs of previously forbidden functions. 2012-12-04 21:40:22 +01:00
Michael Niedermayer
37e81996dc Merge commit '9221efef7968463f3e3d9ce79ea72eaca082e73f' 
* commit '9221efef7968463f3e3d9ce79ea72eaca082e73f':
  lavf: fix av_interleaved_write_frame() doxy.
  lavf: clarify the lifetime of demuxed packets.
  avconv: do not free muxed packet on streamcopy.
  crc: move doxy to the header
  vf_drawtext: do not use deprecated av_tree_node_size
  x86: Refactor PSWAPD fallback implementations and port to cpuflags

Merged-by: Michael Niedermayer <michaelni@gmx.at>
 2012-11-03 14:24:11 +01:00
Anton Khirnov
b4dc6dccba crc: move doxy to the header 2012-11-02 18:28:56 +01:00
Michael Niedermayer
707138593a Merge remote-tracking branch 'qatar/master' 
* qatar/master:
  adpcmenc: cosmetics: pretty-printing
  ac3dec: cosmetics: pretty-printing
  yuv4mpeg: cosmetics: pretty-printing
  shorten: remove dead initialization
  roqvideodec: set AVFrame reference before reget_buffer.
  bmp: fix some 1bit samples.
  latmdec: add fate test for audio config change
  oma: PCM support
  oma: better format detection with small probe buffer
  oma: clearify ambiguous if condition
  wavpack: Properly clip samples during lossy decode
  Code clean-up for crc.c, lfg.c, log.c, random_see.d, rational.c and tree.c.
  Cleaned pixdesc.c file in libavutil
  zmbv.c: coding style clean-up.
  xan.c: coding style clean-up.
  mpegvideo.c: code cleanup - first 500 lines.

Conflicts:
	Changelog
	libavcodec/adpcmenc.c
	libavcodec/bmp.c
	libavcodec/zmbv.c
	libavutil/log.c
	libavutil/pixdesc.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>
 2011-12-05 00:11:57 +01:00
Yordan Makariev
425b45d4b0 Code clean-up for crc.c, lfg.c, log.c, random_see.d, rational.c and tree.c. 
Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>
 2011-12-03 15:13:48 -08:00
Michael Niedermayer
0a23067ab4 Merge remote-tracking branch 'qatar/master' 
* qatar/master:
  mpeg4dec: use unsigned type for startcode in ff_mpeg4_decode_picture_header
  mpeg124: use sign_extend() function
  ac3dec: use get_sbits() instead of manually sign-extending
  4xm: fix signed overflow
  wmavoice: fix a signed overflow
  mpegvideo_enc: fix a signed overflow
  crc: fix signed overflow
  fate: run avconv with -nostats flag
  avtools: add -v as alias for -loglevel
  avconv: always print stats with AV_LOG_INFO
  doc/avconv: add forgotten output/per-stream info to -filter
  avconv: add -stats option to enable/disable printing encoding progress
  avconv: in output_packet() don't set decoded_data_size for video.
  avconv: remove pointless always true condition
  avconv: factorize common code in transcode_init()
  zmbv: remove memcpy() of decoded frame
  mpeg12enc: use sign_extend() function
  h264pred: use unsigned types for pixel values, fix signed overflows
  h264: fix signed overflows in x*0x01010101 expressions
  h264pred: remove unused variables

Conflicts:
	avconv.c
	tests/fate-run.sh

Merged-by: Michael Niedermayer <michaelni@gmx.at>
 2011-10-10 03:50:58 +02:00
Mans Rullgard
8b19ae0761 crc: fix signed overflow 
This fixes a signed overflow from i << 24 when i == 255 by
making i unsigned.  The result of the shift is already
assigned to an variable of unsigned type.

Signed-off-by: Mans Rullgard <mans@mansr.com>
 2011-10-09 16:53:31 +01:00
Mans Rullgard
2912e87a6c Replace FFmpeg with Libav in licence headers 
Signed-off-by: Mans Rullgard <mans@mansr.com>
 2011-03-19 13:33:20 +00:00
Måns Rullgård
8fc0162ac4 Add av_ prefix to bswap macros 
Originally committed as revision 24170 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2010-07-10 22:12:30 +00:00
Måns Rullgård
e6b22522c9 bswap: change ME to NE in macro names 
Other parts of FFmpeg use NE (native endian) rather than ME (machine).
This makes it consistent.

Originally committed as revision 24169 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2010-07-10 22:09:01 +00:00
Diego Biurrun
e669590a0a Fix parameter name and position in av_crc_init Doxygen documentation. 
Originally committed as revision 23981 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2010-07-02 11:49:17 +00:00
Måns Rullgård
49bd8e4b84 Fix grammar errors in documentation 
Originally committed as revision 23904 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2010-06-30 15:38:06 +00:00
Måns Rullgård
2ed6f39944 Replace many includes of libavutil/common.h with what is actually needed 
This reduces the number of false dependencies on header files and
speeds up compilation.

Originally committed as revision 22407 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2010-03-09 17:39:19 +00:00
Jeff Downs
d468ff0fdf Fix cast of byte buffer to uint32 that was disregarding alignment 
requirements.
Now calculates crc byte at a time until aligned, then continues with uint32
optimized calculation.
This fixes crashes during mlp decoding on sparc (at least, maybe others).

Originally committed as revision 19160 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2009-06-12 02:13:12 +00:00
Diego Biurrun
7d685b486b spelling/grammar/consistency review part III 
Originally committed as revision 16849 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2009-01-28 23:16:49 +00:00
Diego Biurrun
89c9ff504b spelling/grammar/consistency review part I 
Originally committed as revision 16840 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2009-01-28 00:16:05 +00:00
Aurelien Jacobs
b250f9c66d Change semantic of CONFIG_*, HAVE_* and ARCH_*. 
They are now always defined to either 0 or 1.

Originally committed as revision 16590 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2009-01-13 23:44:16 +00:00
Diego Biurrun
e503674c4a Add necessary, remove unnecessary #includes. 
Originally committed as revision 16547 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2009-01-11 21:03:42 +00:00
Aurelien Jacobs
37d3e0667a uses FF_ARRAY_ELEMS() where appropriate 
Originally committed as revision 15662 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2008-10-21 21:40:24 +00:00
Michael Niedermayer
070144671d Dont cast const away. 
Originally committed as revision 11700 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2008-02-01 01:33:16 +00:00
Diego Biurrun
f3635240b7 Fix a couple of 'return type defaults to int' and 'control reaches end of 
non-void function' warnings in test code.

Originally committed as revision 11491 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2008-01-10 10:35:37 +00:00
Aurelien Jacobs
03d83abcc6 Fix access to the last element of the table. 
(size of the table vs. number of elements in the table)

Originally committed as revision 11448 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2008-01-07 13:19:38 +00:00
Aurelien Jacobs
3abe5fbdc4 improve CRC API 
- don't export any global var
 - provide either generated or hardcoded tables

Originally committed as revision 11409 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2008-01-04 23:09:58 +00:00
Diego Biurrun
f8a80fd69d main() --> main(void) 
Originally committed as revision 11079 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2007-11-23 00:52:56 +00:00
Reimar Döffinger
45e3c163a9 Additional documentation for CRC functions 
Originally committed as revision 10151 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2007-08-20 16:54:47 +00:00
Reimar Döffinger
7b07d3e8fe Use defines instead of raw hex numbers to specify CRC polynomials 
Originally committed as revision 10143 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2007-08-19 12:36:15 +00:00
Michael Niedermayer
08cb195020 kill 3 more av_mallocz_static() 
Originally committed as revision 8397 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2007-03-14 01:59:53 +00:00
Diego Biurrun
b78e7197a8 Change license headers to say 'FFmpeg' instead of 'this program/this library' 
and fix GPL/LGPL version mismatches.

Originally committed as revision 6577 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2006-10-07 15:30:46 +00:00
Diego Biurrun
04d7f60143 Add official LGPL license headers to the files that were missing them. 
Originally committed as revision 6219 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2006-09-10 14:02:42 +00:00
Michael Niedermayer
a08d38ee82 put the code which is specific for the large crc table under #ifndef CONFIG_SMALL 
Originally committed as revision 5676 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2006-07-08 20:23:19 +00:00