RepoMirrors
/
ffmpeg
mirror of https://git.ffmpeg.org/ffmpeg.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity
ffmpeg/libavutil
History
Ganesh Ajjanagadde e29db08cf7 lavu/libm: add exp10 support 
exp10 is a function available in GNU libm. Looks like no other common
libm has it. This adds support for it to FFmpeg.

There are essentially 2 ways of handling the fallback:
1. Using pow(10, x)
2. Using exp2(M_LOG2_10 * x).

First one represents a Pareto improvement, with no speed or accuracy
regression anywhere, but speed improvement limited to GNU libm.

Second one represents a slight accuracy loss (relative error ~ 1e-13)
for non GNU libm. Speedup of > 2x is obtained on non GNU libm platforms,
~30% on GNU libm. These are "average case numbers", another benefit is
the lack of triggering of the well-known terrible worst case paths
through pow.

Based on reviews, second one chosen. Comment added accordingly.

Reviewed-by: Hendrik Leppkes <h.leppkes@gmail.com>
Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Reviewed-by: Ronald S. Bultje <rsbultje@gmail.com>
Signed-off-by: Ganesh Ajjanagadde <gajjanagadde@gmail.com>
 		2015-12-23 09:22:59 -08:00
..
aarch64
…
arm avutil/attributes: add AV_GCC_VERSION_AT_MOST 2015-09-18 12:41:29 -03:00
avr32
…
bfin
…
mips mips: intreadwrite: Only execute that code for mips r1 or r2 2015-09-29 11:10:37 +02:00
ppc
…
sh4
…
tomi
…
x86 avutil/x86/bswap: Remove warning about bswap intrinsics with msvc. 2015-11-23 23:03:32 +11:00
Makefile libavutil: add aes-ctr support 2015-12-15 14:16:28 +01:00
adler32.c
…
adler32.h
…
aes.c lavu/aes: test CBC functionality 2015-10-28 09:38:21 -05:00
aes.h lavu: Drop deprecated context size variables 2015-08-28 16:04:27 +02:00
aes_ctr.c libavutil: add aes-ctr support 2015-12-15 14:16:28 +01:00
aes_ctr.h libavutil: add aes-ctr support 2015-12-15 14:16:28 +01:00
aes_internal.h lavu/aes: align AVAES struct members 2015-10-28 04:23:14 -05:00
atomic.c
…
atomic.h
…
atomic_gcc.h
…
atomic_suncc.h
…
atomic_win32.h
…
attributes.h avutil/attributes: add av_warn_unused_result 2015-10-05 19:30:20 +02:00
audio_fifo.c avfilter: add showfreqs filter 2015-08-19 16:15:13 +00:00
audio_fifo.h avutil/audio_fifo: add av_warn_unused_result 2015-10-28 23:05:31 -04:00
avassert.h
…
avstring.c avutil/avstring: Inline some tiny functions 2015-10-03 13:45:37 +02:00
avstring.h avutil/avstring: add av_warn_unused_result 2015-10-27 23:16:09 -04:00
avutil.h doxygen: Remove lavu_internal group 2015-08-22 10:07:05 -07:00
avutilres.rc
…
base64.c
…
base64.h
…
blowfish.c avutil: undo FF_API_CRYPTO_CONTEXT deprecation 2015-10-16 19:13:38 -03:00
blowfish.h avutil: undo FF_API_CRYPTO_CONTEXT deprecation 2015-10-16 19:13:38 -03:00
bprint.c
…
bprint.h
…
bswap.h
…
buffer.c
…
buffer.h
…
buffer_internal.h
…
camellia.c avutil: use EINVAL instead of -1 for the return code of crypto related init functions 2015-10-18 15:17:58 -04:00
camellia.h
…
cast5.c avutil: use EINVAL instead of -1 for the return code of crypto related init functions 2015-10-18 15:17:58 -04:00
cast5.h avutil/cast5: update Doxygen for av_cast5_init with return information 2015-10-15 22:32:58 -04:00
channel_layout.c libavutil/channel_layout: Check strtol*() for failure 2015-11-05 19:28:19 +01:00
channel_layout.h Merge commit 'e23f84d9652474353d8bbc42787a56ec1991908f' 2015-08-24 10:40:24 +02:00
color_utils.c avutil/color_utils: Add basic transfer functions for each AVColorTransferCharacteristic 2015-09-10 23:53:05 +02:00
color_utils.h avutil/color_utils: Add basic transfer functions for each AVColorTransferCharacteristic 2015-09-10 23:53:05 +02:00
colorspace.h
…
common.h avutil: Move av_rint64_clip_* to internal.h 2015-11-15 03:47:09 +01:00
cpu.c lavu: add AESNI CPU flag 2015-10-28 04:23:14 -05:00
cpu.h lavu: add AESNI CPU flag 2015-10-28 04:23:14 -05:00
cpu_internal.h
…
crc.c avutil/crc: use EINVAL instead of -1 for the return code of av_crc_init() 2015-10-16 03:24:36 +02:00
crc.h avutil/crc: avoid needless space wastage of hardcoded crc table 2015-12-02 18:31:56 -05:00
des.c avutil: use EINVAL instead of -1 for the return code of crypto related init functions 2015-10-18 15:17:58 -04:00
des.h avutil: undo FF_API_CRYPTO_CONTEXT deprecation 2015-10-16 19:13:38 -03:00
dict.c Merge commit '11c5f438ff83da5040e85bfa6299f56b321d32ef' 2015-10-14 14:01:11 +02:00
dict.h Merge commit '11c5f438ff83da5040e85bfa6299f56b321d32ef' 2015-10-14 14:01:11 +02:00
display.c
…
display.h
…
downmix_info.c
…
downmix_info.h
…
dynarray.h
…
error.c lavu/error: add missing error messages for errors supported on all platforms 2015-12-18 04:04:14 +01:00
error.h
…
eval.c lavu/eval: remove pow and exp2 for postfixes 2015-12-16 07:56:54 -05:00
eval.h avutil/eval: minor typo 2015-11-01 19:35:01 -05:00
fifo.c avutil/fifo: add function av_fifo_generic_peek_at() 2015-10-14 20:23:58 +02:00
fifo.h avutil/fifo: add function av_fifo_generic_peek_at() 2015-10-14 20:23:58 +02:00
file.c
…
file.h avutil/file: add av_warn_unused_result to av_file_map 2015-10-16 17:18:39 -04:00
file_open.c avutil/file_open: avoid file handle inheritance on Windows 2015-11-02 17:40:49 +01:00
fixed_dsp.c
…
fixed_dsp.h
…
float_dsp.c avutil: merge avpriv_float_dsp_init into avpriv_float_dsp_alloc 2015-10-21 00:24:58 +02:00
float_dsp.h avutil: merge avpriv_float_dsp_init into avpriv_float_dsp_alloc 2015-10-21 00:24:58 +02:00
frame.c lavu/frame: use AVPALETTE_SIZE instead of 1024 2015-12-08 17:50:40 +01:00
frame.h Merge commit '1aa24df74c052a73175c43e57d35b4835e537ec8' 2015-10-03 09:52:39 +02:00
hash.c
…
hash.h
…
hmac.c lavu/hmac: remove deprecated type ids 2015-09-05 18:07:20 +02:00
hmac.h lavu/hmac: remove deprecated type ids 2015-09-05 18:07:20 +02:00
imgutils.c imgutils: Use designated initializers for AVClass 2015-11-23 18:30:25 -08:00
imgutils.h
…
integer.c avutil/integer: Fix av_mod_i() with negative dividend 2015-12-01 13:26:12 +01:00
integer.h
…
internal.h cosmetics: Fix weird indentations 2015-12-07 10:43:43 -08:00
intfloat.h
…
intmath.c intmath: remove av_ctz. 2015-10-11 18:03:10 -04:00
intmath.h lavu/intmath: add faster clz support 2015-12-19 09:35:34 -08:00
intreadwrite.h
…
lfg.c
…
lfg.h
…
libavutil.v
…
libm.h lavu/libm: add exp10 support 2015-12-23 09:22:59 -08:00
lls.c avutil/lls: speed up performance of solve_lls 2015-11-26 09:20:46 -05:00
lls.h lavu: Drop deprecated private lls functions 2015-08-28 16:04:27 +02:00
log.c avutil/log: fix zero length gnu_printf format string warning 2015-09-17 18:58:01 +02:00
log.h
…
log2_tab.c
…
lzo.c
…
lzo.h
…
macros.h
…
mathematics.c avutil/mathematics: Fix division by 0 2015-12-09 17:39:38 +01:00
mathematics.h avutil/mathematics: correct documentation for av_gcd 2015-10-30 13:42:04 -04:00
md5.c lavu: Drop deprecated context size variables 2015-08-28 16:04:27 +02:00
md5.h lavu: Drop deprecated context size variables 2015-08-28 16:04:27 +02:00
mem.c avutil/mem: Add av_fast_mallocz() 2015-11-18 22:05:16 +01:00
mem.h avutil/mem: Add av_fast_mallocz() 2015-11-18 22:05:16 +01:00
mem_internal.h
…
motion_vector.h avutil/motion_vector: export subpel motion information 2015-11-23 10:55:15 +01:00
murmur3.c
…
murmur3.h
…
opencl.c lavu/opencl: restore #if HAVE_THREADS 2015-12-07 20:28:30 +01:00
opencl.h opencl: Force the use of 1.2 APIs 2015-10-17 01:16:50 -07:00
opencl_internal.c
…
opencl_internal.h avutil/opencl_internal: add av_warn_unused_result 2015-10-31 10:40:54 -04:00
opt.c lavu/opt: enhance printing durations. 2015-11-07 16:04:09 +01:00
opt.h lavu/opt: add flag to return NULL when applicable in av_opt_get 2015-10-09 04:12:57 -05:00
parseutils.c Merge commit '219b39a71a5694b1c14a07b86477f665a5b6849b' 2015-07-21 16:55:39 +02:00
parseutils.h
…
pca.c
…
pca.h
…
pixdesc.c pixfmt: Add new SMPTE color primaries and transfer characteristic values 2015-09-17 10:31:43 +02:00
pixdesc.h Merge commit '7b02cb29d9d60cdd5ef321043d11d02023e7dc8f' 2015-09-12 13:03:04 +02:00
pixelutils.c
…
pixelutils.h
…
pixfmt.h pixfmt: Add new SMPTE color primaries and transfer characteristic values 2015-09-17 10:31:43 +02:00
qsort.h avutil/qsort: use the do while form for AV_QSORT, AV_MSORT 2015-10-23 08:41:16 -04:00
random_seed.c lavu/random_seed: use arc4random() when available 2015-12-17 08:12:41 -08:00
random_seed.h
…
rational.c avutil/rational: Test av_rescale_rnd() with combinations of "special" values 2015-12-02 21:38:11 +01:00
rational.h
…
rc4.c avutil: use EINVAL instead of -1 for the return code of crypto related init functions 2015-10-18 15:17:58 -04:00
rc4.h avutil: undo FF_API_CRYPTO_CONTEXT deprecation 2015-10-16 19:13:38 -03:00
replaygain.h
…
reverse.c avutil: add ff_reverse as av_reverse replacement 2015-08-12 00:14:14 +02:00
ripemd.c avutil/ripemd: make rol macro more robust by adding parentheses 2015-10-28 21:42:15 -04:00
ripemd.h
…
samplefmt.c
…
samplefmt.h
…
sha.c avutil: use EINVAL instead of -1 for the return code of crypto related init functions 2015-10-18 15:17:58 -04:00
sha.h lavu: Drop deprecated context size variables 2015-08-28 16:04:27 +02:00
sha512.c avutil: use EINVAL instead of -1 for the return code of crypto related init functions 2015-10-18 15:17:58 -04:00
sha512.h
…
softfloat.c avutil/softfloat: Include negative numbers in cmp/gt tests 2015-11-08 15:04:05 +01:00
softfloat.h avutil/softfloat: Assert that the exponent did not overflow the legal range in av_normalize1_sf() 2015-12-11 13:39:21 +01:00
softfloat_tables.h
…
stereo3d.c
…
stereo3d.h
…
tablegen.h libavutil/tablegen: add missing math.h include 2015-12-04 14:49:35 +01:00
tea.c Add support for TEA (Tiny Encryption Algorithm) 2015-07-21 23:10:44 +02:00
tea.h Add support for TEA (Tiny Encryption Algorithm) 2015-07-21 23:10:44 +02:00
thread.h Merge commit 'c53e796f8b69799b7ad6d28fbab981d37edf1bc9' 2015-10-14 23:02:35 +02:00
threadmessage.c lavc, lavu: use avutil/thread.h instead of redundant conditional includes 2015-12-07 17:25:51 +01:00
threadmessage.h avutil/threadmessage: add av_thread_message_flush() 2015-12-07 11:39:28 +01:00
time.c
…
time.h
…
time_internal.h
…
timecode.c avutil/timecode: Fix fps check 2015-12-03 04:09:48 +01:00
timecode.h
…
timer.h
…
timestamp.h
…
tree.c avutil/tree: clean up pointer incompatibility warnings 2015-10-25 12:45:10 -04:00
tree.h avutil/tree: Document the guaranteed ordering of compare arguments for av_tree_find() 2015-10-25 17:28:47 +01:00
twofish.c avutil: use EINVAL instead of -1 for the return code of crypto related init functions 2015-10-18 15:17:58 -04:00
twofish.h
…
utf8.c
…
utils.c lavu: disable wrong value check in get_version() upon api bump. 2015-08-18 15:57:20 -04:00
version.h libavutil: add aes-ctr support 2015-12-15 14:16:28 +01:00
wchar_filename.h avutil/wchar_filename: add av_warn_unused_result 2015-10-30 13:47:28 -04:00
x86_cpu.h
…
xga_font_data.c
…
xga_font_data.h
…
xtea.c Merge commit '588b6215b4c74945994eb9636b0699028c069ed2' 2015-11-22 14:29:09 +00:00
xtea.h Merge commit '588b6215b4c74945994eb9636b0699028c069ed2' 2015-11-22 14:29:09 +00:00