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56 Commits

Author SHA1 Message Date
Michael Niedermayer
4aa1a42a91
avutil/softfloat: Basic documentation for av_sincos_sf() 
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
 2023-06-23 02:06:46 +02:00
Michael Niedermayer
d84677abd8
avutil/softfloat: fix av_sincos_sf() 
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
 2023-06-23 02:06:46 +02:00
Michael Niedermayer
e34fe61bf4 avutil/softfloat: Add FLOAT_MIN 
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
 2017-11-05 22:13:16 +01:00
Michael Niedermayer
6019d721d4 avutil/softfloat: Fix sign error in and improve documentation of av_int2sf() 
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
 2017-06-04 23:41:08 +02:00
Michael Niedermayer
277e397eb5 avutil/softfloat: Fix overflow in av_div_sf() 
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
 2017-05-06 23:23:39 +02:00
Michael Niedermayer
35f3df0d76 avutil/softfloat: Fix multiple runtime error: left shift of negative value -8 
Fixes: 1352/clusterfuzz-testcase-minimized-5757565017260032

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
 2017-05-06 00:33:19 +02:00
Michael Niedermayer
79aa2ff199 avutil/softfloat: use ldexp(), fixes undefined shift 
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
 2017-05-02 22:55:44 +02:00
Andreas Cadhalpun
2d6f46d801 softfloat: decrease MIN_EXP to cover full float range 
floats are not necessarily normalized, so a normalized softfloat needs
MIN_EXP lowered by 23 to cover that range.

Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
 2016-11-25 01:23:48 +01:00
Andreas Cadhalpun
0edd569466 softfloat: handle -INT_MAX correctly 
This is similar to commit 9ac61e73d0.

Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
 2016-11-14 22:57:07 +01:00
Michael Niedermayer
52ca24bdd2 avutil/softfloat: Improve doxy for av_sub_sf() and av_sf2int() 
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
 2016-05-29 14:45:07 +02:00
Michael Niedermayer
d1520a6cfd avutil/softfloat: Document public constants and a few public functions 
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
 2016-05-28 14:24:20 +02:00
Michael Niedermayer
5e8b9e746f avutil/softfloat: Assert that the exponent did not overflow the legal range in av_normalize1_sf() 
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
 2015-12-11 13:39:21 +01:00
James Almer
9f4a41bf99 avutil/softfloat: use abort() instead of av_assert0(0) 
Fixes compilation of host tool aacps_fixed_tablegen.

Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: James Almer <jamrial@gmail.com>
 2015-11-10 13:37:24 -03:00
Andreas Cadhalpun
9ac61e73d0 softfloat: handle INT_MIN correctly in av_int2sf 
Otherwise v=INT_MIN doesn't get normalized and thus triggers av_assert2
in other functions.

Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
 2015-11-08 21:06:40 +01:00
Andreas Cadhalpun
f3866a14c3 softfloat: assert when the argument of av_sqrt_sf is negative 
The correct result can't be expressed in SoftFloat.
Currently it returns a random value from an out of bounds read.

Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
 2015-11-08 21:05:21 +01:00
Michael Niedermayer
05b05a7a84 avutil/softfloat: Fix av_gt_sf() with large exponents try #2 
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
 2015-11-08 15:03:28 +01:00
Michael Niedermayer
cee3c9d29a avutil/softfloat: Fix overflows in shifts in av_cmp_sf() and av_gt_sf() 
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
 2015-11-08 14:54:51 +01:00
Michael Niedermayer
046218b212 avutil/softfloat: Fix exponent underflow in av_div_sf() 
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
 2015-11-08 14:23:38 +01:00
Michael Niedermayer
a1e3303fc0 avutil/softfloat: Fix exponent underflow in av_mul_sf() 
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
 2015-11-08 14:23:38 +01:00
Michael Niedermayer
4135a2bfd6 avutil/softfloat: Fix typo in av_mul_sf() doxy 
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
 2015-11-08 14:23:37 +01:00
Michael Niedermayer
4b6ad23609 Revert "avutil/softfloat: Check for MIN_EXP in av_sqrt_sf()" 
This case should not be possible if the input has a exponent within
the valid range

This reverts commit 0269fb11e3.
 2015-11-08 14:23:37 +01:00
Michael Niedermayer
0269fb11e3 avutil/softfloat: Check for MIN_EXP in av_sqrt_sf() 
Otherwise the exponent could eventually underflow

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
 2015-11-08 13:39:06 +01:00
Michael Niedermayer
107db5abf3 avutil/softfloat: Correctly set the exponent for 0.0 in av_sqrt_sf() 
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
 2015-11-08 13:39:06 +01:00
Michael Niedermayer
a66b243d52 avutil/softfloat: FLOAT_0 should use MIN_EXP 
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
 2015-11-08 03:57:02 +01:00
James Almer
a176bbc873 avutil/softfloat: move av_sincos_sf() back to header 
Fixes compilation of host tool aacps_fixed_tablegen

Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: James Almer <jamrial@gmail.com>
 2015-07-22 23:12:21 -03:00
Djordje Pesut
f85bc147fb avcodec: Implementation of AAC_fixed_decoder (SBR-module) 
Add fixed poind code.

Signed-off-by: Nedeljko Babic <nedeljko.babic@imgtec.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
 2015-07-20 17:20:16 +02:00
James Almer
20abb1afe5 softfloat: make av_div_sf() inline 
Removes a defined but not used warning on files including softfloat.h

Reviewed-by: Michael Niedermayer <michaelni@gmx.at>
Signed-off-by: James Almer <jamrial@gmail.com>
 2015-06-13 22:28:39 -03:00
Michael Niedermayer
daf1158d77 avutil/softfloat: Move av_sf2double() to header 
It was not intended to be a static private function

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2015-06-11 16:16:38 +02:00
Michael Niedermayer
af8d63e756 avutil/softfloat: Fix alternative implementation of av_normalize1_sf() 
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2015-06-05 17:40:16 +02:00
Michael Niedermayer
6690ca22b3 avutil/softfloat: Fix alternative implementation of av_normalize_sf() 
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2015-06-05 17:40:16 +02:00
Michael Niedermayer
d3585c53de avutil/softfloat: Move av_sincos_sf() from header to c file 
The function is quite big and trigonometric functions should not really
be used in speed critical code

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2015-06-05 13:42:05 +02:00
Michael Niedermayer
c7ce16e716 avutil/softfloat: Fix thresholds in av_normalize_sf() 
Found-by: Nedeljko Babic <Nedeljko.Babic@imgtec.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2015-06-05 12:56:12 +02:00
Nedeljko Babic
7131aba916 libavutil/softfloat: Fix av_normalize1_sf bias. 
av_normalize1_sf doesn't properly address border case when mantis is
exactly -0x40000000.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2015-06-04 17:20:03 +02:00
Nedeljko Babic
1fae268307 libavutil/softfloat: Add functions. 
Functions av_gt_sf, av_sqrt_sf and av_sincos_sf added to softfloat

Signed-off-by: Nedeljko Babic <nedeljko.babic@imgtec.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2015-04-30 15:05:12 +02:00
Nedeljko Babic
7bab281475 libavutil/softfloat: Added av_normalize_sf in av_add_sf 
This will normalize sums for which mantissa is smaller than the lower boundary
(needed for implementation of fixed point aac decoder).

Signed-off-by: Nedeljko Babic <nedeljko.babic@imgtec.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2015-04-30 14:53:09 +02:00
Nedeljko Babic
a1c7fe431c libavutil/softfloat: exponent adjusted for aac fixed point dec 
Exponent usage and calculation in softfloat adjusted to the format used in
implementation of fixed point aac decoder.

Signed-off-by: Nedeljko Babic <nedeljko.babic@imgtec.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2015-04-30 14:20:28 +02:00
Michael Niedermayer
a3110beebd avutil/softfloat: document av_int2sf() 
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2015-04-25 14:51:02 +02:00
Nedeljko Babic
f4ccf38902 libavutil/softfloat: Change order of fields in SoftFloat structure. 
Softfloat will be used in implementation of AAC fixed point decoder.
This change is needed in order to more easily integrate ffmpegs softfloat in
already developed algorithm for AAC.

Signed-off-by: Nedeljko Babic <nedeljko.babic@imgtec.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2015-04-15 18:53:55 +02:00
Michael Niedermayer
171d971dbf avutil/softfloat: Fix undefined shift in av_add_sf() 
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2014-10-10 19:36:12 +02:00
Michael Niedermayer
99afec08f8 avutil/softfloat: add some asserts 
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2014-10-09 17:02:59 +02:00
Michael Niedermayer
44198a728d avutil/softfloat: Fix dependence on signed overflow in av_normalize1_sf() 
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2014-10-09 16:52:56 +02:00
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
Stefano Sabatini
987903826b Globally rename the header inclusion guard names. 
Consistently apply this rule: the guard name is obtained from the
filename by stripping the leading "lib", converting '/' and '.'  to
'_' and uppercasing the resulting name. Guard names in the root
directory have to be prefixed by "FFMPEG_".

Originally committed as revision 15120 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2008-08-31 07:39:47 +00:00
Diego Biurrun
ca74c0a180 cosmetics: Fix two common typos: wont --> will not, lets --> let us. 
Originally committed as revision 14372 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2008-07-24 17:09:28 +00:00
Måns Rullgård
3540b950ec add missing #include "common.h" to libavutil headers 
Originally committed as revision 12502 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2008-03-19 08:47:31 +00:00
Zuxy Meng
85074d3c93 Reapply r12489: Add pure, const and malloc attributes to proper functions 
in libavutil.
Fix a compilation failure in r12489.

Originally committed as revision 12498 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2008-03-19 06:17:43 +00:00
Benoit Fouet
2119bb8f51 revert r12489. 
Originally committed as revision 12490 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2008-03-18 16:29:47 +00:00
Zuxy Meng
6544f48f03 Pure, const and malloc attributes to libavutil. 
Patch by Zuxy Meng: zuxy meng gmail com
Original thread:
[FFmpeg-devel] [PATCH] Pure, const and malloc attributes to libavutil
Date: 03/18/2008 6:09 AM

Originally committed as revision 12489 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2008-03-18 15:27:15 +00:00
Diego Biurrun
5b21bdabe4 Add FFMPEG_ prefix to all multiple inclusion guards. 
Originally committed as revision 10765 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2007-10-17 09:37:46 +00:00
Diego Biurrun
e5a389a1b7 license header consistency cosmetics 
Originally committed as revision 9484 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2007-07-05 10:40:25 +00:00