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Janne Grunau 8563f98871 x86: use emms after ff_int32_to_float_fmul_scalar_sse

Intel's Instruction Set Reference (as of September 2015) clearly states
that cvtpi2ps switches to MMX state. Actual CPUs do not switch if the
source is a memory location. The Instruction Set Reference from 1999
(Order Number 243191) describes this behaviour but all later versions
I've seen have make no distinction whether MMX registers or memory is
used as source.
The documentation for the matching SSE2 instruction to convert to double
(cvtpi2pd) was fixed (see the valgrind bug
https://bugs.kde.org/show_bug.cgi?id=210264).

It will take time to get a clarification and fixes in place. In the
meantime it makes sense to change ff_int32_to_float_fmul_scalar_sse to
be correct according to the documentation. The vast majority of users
will have SSE2 so a change to the SSE version has little effect.

Fixes fate-checkasm on x86 valgrind targets.

Valgrind 'bug' reported as https://bugs.kde.org/show_bug.cgi?id=357059

2015-12-30 13:37:57 +01:00

compat

w32pthreads: Map MemoryBarrier to __sync_synchronize on mingw

2015-10-30 20:15:11 +02:00

doc

lavc: add profiles to AVCodecDescriptor

2015-12-12 21:22:49 +01:00

libavcodec

x86: use emms after ff_int32_to_float_fmul_scalar_sse

2015-12-30 13:37:57 +01:00

libavdevice

avfoundation: Simple capture

2015-11-26 10:55:28 +01:00

libavfilter

vsrc_color: Drop unneeded variable

2015-11-30 10:58:46 -05:00

libavformat

Remove stray line breaks from avpriv_{report_missing_feature|request_samples}

2015-12-26 10:28:03 +01:00

libavresample

avresample: Mark avresample_buffer() as pointer to const

2015-12-14 15:16:33 +01:00

libavutil

arm: add a cpu flag for the VFPv2 vector mode

2015-12-14 16:42:35 +01:00

libswscale

lavu: Drop the {minus,plus}1 suffix from AVComponentDescriptor fields

2015-09-07 12:37:47 +02:00

presets

presets: spelling error in libvpx 1080p50_60

2011-10-22 00:28:56 +02:00

tests

checkasm: x86: post commit review fixes

2015-12-29 12:50:38 +01:00

tools

avpacket: Replace av_free_packet with av_packet_unref

2015-10-26 18:00:55 +01:00

.gitattributes

Treat all '*.pnm' files as non-text file

2014-11-28 17:52:43 -05:00

.gitignore

Checkasm: assembly testing and benchmarking tool

2015-07-12 16:39:07 +02:00

.travis.yml

travis: Enable OSX integration

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

arch.mak

ppc: vsx: Implement float_dsp

2015-05-31 12:07:11 +02:00

avconv_dxva2.c

avconv_dxva2: add hevc support

2015-01-27 09:06:05 +01:00

avconv_filter.c

avconv: Do not try to configure filter outputs without streams

2015-10-07 18:45:50 +02:00

avconv_opt.c

avconv: add support for Intel QSV-accelerated transcoding

2015-10-16 20:01:37 +02:00

avconv_qsv.c

avconv: add support for Intel QSV-accelerated transcoding

2015-10-16 20:01:37 +02:00

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: allocate video surface of VDPAU-specified size

2014-12-25 20:47:49 +01:00

avconv.c

avconv: pass the global codec side data to the muxer

2015-12-06 10:23:21 +01:00

avconv.h

avconv: add support for Intel QSV-accelerated transcoding

2015-10-16 20:01:37 +02:00

avplay.c

avpacket: Replace av_free_packet with av_packet_unref

2015-10-26 18:00:55 +01:00

avprobe.c

avprobe: Unref the packet once it is used

2015-10-26 18:00:54 +01:00

Changelog

lavf: G.723.1 muxer

2015-11-30 10:58:46 -05:00

cmdutils_common_opts.h

avplay: Accept cpuflags option

2013-10-22 10:49:31 +02:00

cmdutils.c

cmdutils: Check for and report the correct codec capability

2015-10-25 22:47:13 +01:00

cmdutils.h

avconv: use read_file() for reading the 2pass stats

2015-07-19 09:37:11 +02:00

common.mak

build: add Solaris symbol versioning

2015-10-11 15:42:36 +02:00

configure

lavc: export Dirac parsing API used by the ogg demuxer as public

2015-12-06 10:28:04 +01:00

COPYING.GPLv2

Rename COPYING.GPL --> COPYING.GPLv2 and COPYING.LGPL --> COPYING.LGPLv2.1.

2009-06-05 09:51:31 +00:00

COPYING.GPLv3

Add configure option to upgrade (L)GPL to version 3.

2009-06-05 11:04:03 +00:00

COPYING.LGPLv2.1

cosmetics: Delete empty lines at end of file.

2012-02-09 12:26:45 +01:00

COPYING.LGPLv3

Add configure option to upgrade (L)GPL to version 3.

2009-06-05 11:04:03 +00:00

CREDITS

partially rename FFmpeg to Libav

2011-03-16 21:54:39 +01:00

INSTALL

doc: clarify configure features

2011-04-07 02:54:12 +02:00

library.mak

build: Support executable only ldflags

2014-07-21 22:18:35 +02:00

LICENSE

license: Mention that vf_interlace is GPL, not LGPL

2014-08-28 19:47:43 +02:00

Makefile

configure: ObjC support

2015-11-26 10:39:15 +01:00

README

doc: Add more information in the README

2014-08-16 00:49:22 +02:00

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

2014-12-01 07:51:14 -05:00

version.sh

Drop git- prefix from version labels

2011-06-19 19:41:23 +01:00

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 90.1%

Assembly 7.9%

Makefile 1.3%

C++ 0.2%

Objective-C 0.2%

Other 0.1%