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ffmpeg-0.6.3

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FFmpeg/libavutil

History

Ganesh Ajjanagadde 68e79b27a5 avutil/lls: speed up performance of solve_lls ... This is a trivial rewrite of the loops that results in better prefetching and associated cache efficiency. Essentially, the problem is that modern prefetching logic is based on finite state Markov memory, a reasonable assumption that is used elsewhere in CPU's in for instance branch predictors. Surrounding loops all iterate forward through the array, making the predictor think of prefetching in the forward direction, but the intermediate loop is unnecessarily in the backward direction. Speedup is nontrivial. Benchmarks obtained by 10^6 iterations within solve_lls, with START/STOP_TIMER. File is tests/data/fate/flac-16-lpc-cholesky.err. Hardware: x86-64, Haswell, GNU/Linux. new: 17291 decicycles in solve_lls, 2096706 runs, 446 skips 17255 decicycles in solve_lls, 4193657 runs, 647 skips 17231 decicycles in solve_lls, 8384997 runs, 3611 skips 17189 decicycles in solve_lls,16771010 runs, 6206 skips 17132 decicycles in solve_lls,33544757 runs, 9675 skips 17092 decicycles in solve_lls,67092404 runs, 16460 skips 17058 decicycles in solve_lls,134188213 runs, 29515 skips old: 18009 decicycles in solve_lls, 2096665 runs, 487 skips 17805 decicycles in solve_lls, 4193320 runs, 984 skips 17779 decicycles in solve_lls, 8386855 runs, 1753 skips 18289 decicycles in solve_lls,16774280 runs, 2936 skips 18158 decicycles in solve_lls,33548104 runs, 6328 skips 18420 decicycles in solve_lls,67091793 runs, 17071 skips 18310 decicycles in solve_lls,134187219 runs, 30509 skips Reviewed-by: Michael Niedermayer <michael@niedermayer.cc> Signed-off-by: Ganesh Ajjanagadde <gajjanagadde@gmail.com>		9 years ago
..
aarch64	Merge commit '780cd20b00a69e26bbfffbb8eec16fbe999ea793'	10 years ago
arm	avutil/attributes: add AV_GCC_VERSION_AT_MOST	9 years ago
avr32	…
bfin	Merge commit '880e2aa23645ed9871c66ee1cbd00f93c72d2d73'	11 years ago
mips	mips: intreadwrite: Only execute that code for mips r1 or r2	9 years ago
ppc	avutil/ppc/cpu: add include avassert.h	10 years ago
sh4	…
tomi	Merge remote-tracking branch 'qatar/master'	12 years ago
x86	avutil/x86/bswap: Remove warning about bswap intrinsics with msvc.	9 years ago
Makefile	avutil: install des.h, rc4.h and tree.h as public headers	9 years ago
adler32.c	avutil/adler32: Fix data type in test code	10 years ago
adler32.h	adler32: Fix doxy group definition	11 years ago
aes.c	lavu/aes: test CBC functionality	9 years ago
aes.h	lavu: Drop deprecated context size variables	9 years ago
aes_internal.h	lavu/aes: align AVAES struct members	9 years ago
atomic.c	avutil/atomic: reuse ret to avoid dereferencing twice the same value.	10 years ago
atomic.h	Merge remote-tracking branch 'qatar/master'	11 years ago
atomic_gcc.h	lavu/atomic: add support for the new memory model aware gcc built-ins	10 years ago
atomic_suncc.h	atomic: Add include guards to the implementation headers	12 years ago
atomic_win32.h	msvc: Fix compilation errors due to header include order.	10 years ago
attributes.h	avutil/attributes: add av_warn_unused_result	9 years ago
audio_fifo.c	avfilter: add showfreqs filter	9 years ago
audio_fifo.h	avutil/audio_fifo: add av_warn_unused_result	9 years ago
avassert.h	av_assert should use AV_LOG_PANIC.	12 years ago
avstring.c	avutil/avstring: Inline some tiny functions	9 years ago
avstring.h	avutil/avstring: add av_warn_unused_result	9 years ago
avutil.h	doxygen: Remove lavu_internal group	9 years ago
avutilres.rc	Add Windows resource file support for shared libraries	11 years ago
base64.c	Merge commit 'fb0c9d41d685abb58575c5482ca33b8cd457c5ec'	11 years ago
base64.h	lavu/base64: extend/clarify doxy for the base64 API	12 years ago
blowfish.c	avutil: undo FF_API_CRYPTO_CONTEXT deprecation	9 years ago
blowfish.h	avutil: undo FF_API_CRYPTO_CONTEXT deprecation	9 years ago
bprint.c	avutil & avdevice: remove av_bprint_fd_contents()	10 years ago
bprint.h	avutil/bprint: C++ compatible AVBPrint definition.	10 years ago
bswap.h	Fix compile error on bfin.	10 years ago
buffer.c	avutil/buffer: Avoid moving the AVBufferRef to a new place in memory in av_buffer_make_writable()	10 years ago
buffer.h	Revert "lavu/buffer: add release function"	11 years ago
buffer_internal.h	Merge commit 'fbd6c97f9ca858140df16dd07200ea0d4bdc1a83'	10 years ago
camellia.c	avutil: use EINVAL instead of -1 for the return code of crypto related init functions	9 years ago
camellia.h	avutil/camellia: fix documentation for av_camellia_crypt()	10 years ago
cast5.c	avutil: use EINVAL instead of -1 for the return code of crypto related init functions	9 years ago
cast5.h	avutil/cast5: update Doxygen for av_cast5_init with return information	9 years ago
channel_layout.c	libavutil/channel_layout: Check strtol*() for failure	9 years ago
channel_layout.h	Merge commit 'e23f84d9652474353d8bbc42787a56ec1991908f'	9 years ago
color_utils.c	avutil/color_utils: Add basic transfer functions for each AVColorTransferCharacteristic	9 years ago
color_utils.h	avutil/color_utils: Add basic transfer functions for each AVColorTransferCharacteristic	9 years ago
colorspace.h	avutil/colorspace: Remove RGB_TO_Y/U/V	10 years ago
common.h	avutil: Move av_rint64_clip_* to internal.h	9 years ago
cpu.c	lavu: add AESNI CPU flag	9 years ago
cpu.h	lavu: add AESNI CPU flag	9 years ago
cpu_internal.h	Merge commit 'cae39851201b7781f1262e1c23627b45e6e80bb4'	10 years ago
crc.c	avutil/crc: use EINVAL instead of -1 for the return code of av_crc_init()	9 years ago
crc.h	Merge commit '0983d48111f578e17e8c1967d25ce593fce62b63'	11 years ago
des.c	avutil: use EINVAL instead of -1 for the return code of crypto related init functions	9 years ago
des.h	avutil: undo FF_API_CRYPTO_CONTEXT deprecation	9 years ago
dict.c	Merge commit '11c5f438ff83da5040e85bfa6299f56b321d32ef'	9 years ago
dict.h	Merge commit '11c5f438ff83da5040e85bfa6299f56b321d32ef'	9 years ago
display.c	Merge commit 'e4fe535d12f4f30df2dd672e30304af112a5a827'	10 years ago
display.h	Merge commit 'e4fe535d12f4f30df2dd672e30304af112a5a827'	10 years ago
downmix_info.c	Merge commit 'c98f3169bfb578c1a4e407b44524f0bfa3b4dc0c'	11 years ago
downmix_info.h	fix spelling errors	10 years ago
dynarray.h	fix spelling errors	10 years ago
error.c	avutil/error: list most common error code in error_entries when strerror_r() is unavailable	10 years ago
error.h	avutil/error: Introduce new error codes for 4XX and 5XX replies from remote servers	10 years ago
eval.c	avutil/eval: change sqrt to hypot	9 years ago
eval.h	avutil/eval: minor typo	9 years ago
fifo.c	avutil/fifo: add function av_fifo_generic_peek_at()	9 years ago
fifo.h	avutil/fifo: add function av_fifo_generic_peek_at()	9 years ago
file.c	Merge commit 'bf704132a51f5d838365158331d4e535e1df4c8e'	10 years ago
file.h	avutil/file: add av_warn_unused_result to av_file_map	9 years ago
file_open.c	avutil/file_open: avoid file handle inheritance on Windows	9 years ago
fixed_dsp.c	avutil/fixed_dsp: remove ff_ prefix from static function	10 years ago
fixed_dsp.h	libavutil: Add new fixed dsp functions.	10 years ago
float_dsp.c	avutil: merge avpriv_float_dsp_init into avpriv_float_dsp_alloc	9 years ago
float_dsp.h	avutil: merge avpriv_float_dsp_init into avpriv_float_dsp_alloc	9 years ago
frame.c	Merge commit '1aa24df74c052a73175c43e57d35b4835e537ec8'	9 years ago
frame.h	Merge commit '1aa24df74c052a73175c43e57d35b4835e537ec8'	9 years ago
hash.c	lavu/hash.c: Add missing "static const".	10 years ago
hash.h	lavu/hash: add hash_final helpers.	11 years ago
hmac.c	lavu/hmac: remove deprecated type ids	9 years ago
hmac.h	lavu/hmac: remove deprecated type ids	9 years ago
imgutils.c	imgutils: Use designated initializers for AVClass	9 years ago
imgutils.h	Replace a few leftover instances of enum PixelFormat with enum AVPixelFormat	10 years ago
integer.c	…
integer.h	…
internal.h	avutil: Move av_rint64_clip_* to internal.h	9 years ago
intfloat.h	Reinstate proper FFmpeg license for all files.	11 years ago
intmath.c	intmath: remove av_ctz.	9 years ago
intmath.h	avutil/intmath: fix undefined behavior in ff_ctzll_c()	9 years ago
intreadwrite.h	libavutil: document side effects of macros	10 years ago
lfg.c	…
lfg.h	…
libavutil.v	lavu: stop exporting internal functions	10 years ago
libm.h	avutil/libm: fix isnan compatibility hack	9 years ago
lls.c	avutil/lls: speed up performance of solve_lls	9 years ago
lls.h	lavu: Drop deprecated private lls functions	9 years ago
log.c	avutil/log: fix zero length gnu_printf format string warning	9 years ago
log.h	avutil/log: modify AV_LOG_MAX_OFFSET for AV_LOG_TRACE	10 years ago
log2_tab.c	…
lzo.c	avutil/lzo: fix resource leak	10 years ago
lzo.h	Merge remote-tracking branch 'qatar/master'	12 years ago
macros.h	Merge remote-tracking branch 'qatar/master'	11 years ago
mathematics.c	avutil/mathematics: make av_gcd more robust	9 years ago
mathematics.h	avutil/mathematics: correct documentation for av_gcd	9 years ago
md5.c	lavu: Drop deprecated context size variables	9 years ago
md5.h	lavu: Drop deprecated context size variables	9 years ago
mem.c	avutil/mem: Add av_fast_mallocz()	9 years ago
mem.h	avutil/mem: Add av_fast_mallocz()	9 years ago
mem_internal.h	avutil/mem_internal: add missing header includes	9 years ago
motion_vector.h	avutil/motion_vector: export subpel motion information	9 years ago
murmur3.c	avutil/murmur3: Add () to protect the ROT() arguments	10 years ago
murmur3.h	Add 128 bit murmur3 hash function.	12 years ago
opencl.c	opencl: Use "opencl" as log context name	9 years ago
opencl.h	opencl: Force the use of 1.2 APIs	9 years ago
opencl_internal.c	lavu: rename ff_opencl_set_parameter() to avpriv_opencl_set_parameter()	10 years ago
opencl_internal.h	avutil/opencl_internal: add av_warn_unused_result	9 years ago
opt.c	lavu/opt: enhance printing durations.	9 years ago
opt.h	lavu/opt: add flag to return NULL when applicable in av_opt_get	9 years ago
parseutils.c	Merge commit '219b39a71a5694b1c14a07b86477f665a5b6849b'	9 years ago
parseutils.h	Merge commit '27f274628234c1f934b9a6a6380ed567c1b4ceae'	10 years ago
pca.c	avutil/pca: Check for av_malloc* failures	10 years ago
pca.h	avutil/pca: Make argument of ff_pca_add() const	10 years ago
pixdesc.c	pixfmt: Add new SMPTE color primaries and transfer characteristic values	9 years ago
pixdesc.h	Merge commit '7b02cb29d9d60cdd5ef321043d11d02023e7dc8f'	9 years ago
pixelutils.c	avutil: check pixdescs in a different place	10 years ago
pixelutils.h	avutil: add pixelutils API	10 years ago
pixfmt.h	pixfmt: Add new SMPTE color primaries and transfer characteristic values	9 years ago
qsort.h	avutil/qsort: use the do while form for AV_QSORT, AV_MSORT	9 years ago
random_seed.c	msvc: fix implicitly declared read/close.	10 years ago
random_seed.h	…
rational.c	avutil/rational: use frexp rather than ad-hoc log to get floating point exponent	9 years ago
rational.h	avutil: Add av_q2intfloat()	10 years ago
rc4.c	avutil: use EINVAL instead of -1 for the return code of crypto related init functions	9 years ago
rc4.h	avutil: undo FF_API_CRYPTO_CONTEXT deprecation	9 years ago
replaygain.h	Merge commit '8542f9c4f17125d483c40c0c5723842f1c982f81'	11 years ago
reverse.c	avutil: add ff_reverse as av_reverse replacement	9 years ago
ripemd.c	avutil/ripemd: make rol macro more robust by adding parentheses	9 years ago
ripemd.h	lavu: Add RIPEMD hashing	12 years ago
samplefmt.c	avutil: remove obsolete FF_API_SAMPLES_UTILS_RETURN_ZERO cruft	10 years ago
samplefmt.h	avutil: remove obsolete FF_API_GET_BITS_PER_SAMPLE_FMT cruft	10 years ago
sha.c	avutil: use EINVAL instead of -1 for the return code of crypto related init functions	9 years ago
sha.h	lavu: Drop deprecated context size variables	9 years ago
sha512.c	avutil: use EINVAL instead of -1 for the return code of crypto related init functions	9 years ago
sha512.h	lavu: Add SHA-2 512 hashing	12 years ago
softfloat.c	avutil/softfloat: Include negative numbers in cmp/gt tests	9 years ago
softfloat.h	avutil/softfloat: use abort() instead of av_assert0(0)	9 years ago
softfloat_tables.h	avutil/softfloat_tables: add missing stdint.h include	10 years ago
stereo3d.c	Merge commit '159a06dfc83d189f753c4583583ddfb571552ff5'	10 years ago
stereo3d.h	Merge commit '440842c4eb1d7709654ec97cd687663d11ef499c'	11 years ago
tea.c	Add support for TEA (Tiny Encryption Algorithm)	9 years ago
tea.h	Add support for TEA (Tiny Encryption Algorithm)	9 years ago
thread.h	Merge commit 'c53e796f8b69799b7ad6d28fbab981d37edf1bc9'	9 years ago
threadmessage.c	lavu: add thread message API.	11 years ago
threadmessage.h	lavu: add thread message API.	11 years ago
time.c	Merge commit '1bd0bdcdc236099d5c0d179696951f35f5310fa5'	10 years ago
time.h	Merge commit '1bd0bdcdc236099d5c0d179696951f35f5310fa5'	10 years ago
time_internal.h	avutil/time_internal: do not attempt to override *time_r() macros	10 years ago
timecode.c	timecode: Support HFR values	9 years ago
timecode.h	lavu: drop disabled FF_API_OLD_TC_ADJUST_FRAMENUM code	12 years ago
timer.h	avutil/timer: give each printed value of STOP_TIMER a fixed length	10 years ago
timestamp.h	avutil/timestamp: Warn about missing __STDC_FORMAT_MACROS for C++ use	11 years ago
tree.c	avutil/tree: clean up pointer incompatibility warnings	9 years ago
tree.h	avutil/tree: Document the guaranteed ordering of compare arguments for av_tree_find()	9 years ago
twofish.c	avutil: use EINVAL instead of -1 for the return code of crypto related init functions	9 years ago
twofish.h	libavutil: Added twofish symmetric block cipher	10 years ago
utf8.c	avutil/utf8: put under #ifdef TEST	11 years ago
utils.c	lavu: disable wrong value check in get_version() upon api bump.	9 years ago
version.h	avutil/motion_vector: export subpel motion information	9 years ago
wchar_filename.h	avutil/wchar_filename: add av_warn_unused_result	9 years ago
x86_cpu.h	…
xga_font_data.c	…
xga_font_data.h	…
xtea.c	Merge commit '588b6215b4c74945994eb9636b0699028c069ed2'	9 years ago
xtea.h	Merge commit '588b6215b4c74945994eb9636b0699028c069ed2'	9 years ago