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Ganesh Ajjanagadde 476ddffccb avutil/common: add FFDIFFSIGN macro

This is of use for defining comparator callbacks. Common approaches like
return x-y are not safe due to the risks of overflow.
Furthermore, the (x > y) - (x < y) trick is optimized to branchless
code.
This also documents this macro accordingly.

Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: Ganesh Ajjanagadde <gajjanagadde@gmail.com>
(cherry picked from commit 265f83fd35977a80e93b3cc13ceb65f52f129a3c)

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

2015-11-12 00:00:57 +01:00

compat

use a wrapper script to call MS link.exe to avoid mixing with /usr/bin/link.exe

2015-07-24 20:02:32 +02:00

doc

update versions for 2.8.2

2015-11-11 02:50:39 +01:00

libavcodec

apng: use correct size for output buffer

2015-11-07 14:11:12 +01:00

libavdevice

avdevice/libdc1394: Make dc1394_frame_format and dc1394_frame_rate, static

2015-08-30 13:10:11 +02:00

libavfilter

doc: fix spelling errors

2015-10-12 21:46:54 +02:00

libavformat

lavf/mov: add support for sidx fragment indexes

2015-11-11 02:50:39 +01:00

libavresample

x86inc: Drop SECTION_TEXT macro

2015-08-04 20:13:09 +02:00

libavutil

avutil/common: add FFDIFFSIGN macro

2015-11-12 00:00:57 +01:00

libpostproc

avutil/x86/asm: rename REG_SP to REG_sp

2015-08-22 02:56:53 +02:00

libswresample

swresample/resample: increase precision for compensation

2015-11-11 18:41:01 +01:00

libswscale

swscale: fix ticket #4881

2015-10-13 20:11:42 +02:00

presets

…

tests

swresample/resample: increase precision for compensation

2015-11-11 18:41:01 +01:00

tools

graph2dot: use avfilter_pad_get_name accessor function

2015-08-20 22:38:01 +02:00

.gitattributes

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

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

.gitignore

doc/examples: rename avio_list_dir -> avio_dir_cmd

2015-08-16 02:16:47 +02:00

arch.mak

use mmi instead of loongson3 as simd-optimization flag

2015-07-07 03:46:57 +02:00

Changelog

update versions for 2.8.2

2015-11-11 02:50:39 +01:00

cmdutils_common_opts.h

opts: add list device sources/sinks options

2014-10-25 20:20:31 +02:00

cmdutils_opencl.c

OpenCL: Avoid potential buffer overflow in cmdutils_opencl.c

2015-04-28 12:18:23 +02:00

cmdutils.c

cmdutils: Filter dst/srcw/h

2015-10-08 13:15:42 +02:00

cmdutils.h

cmdutils: remove sws_opts usage, simplify code

2015-08-08 16:51:25 +02:00

common.mak

Merge commit '3ae0e721c7b6e0483801b9039b3d140e3b68b7f5'

2015-07-22 16:30:37 +02:00

configure

configure: Require libkvazaar < 0.7.

2015-10-14 14:15:30 +02:00

COPYING.GPLv2

…

COPYING.GPLv3

…

COPYING.LGPLv2.1

…

COPYING.LGPLv3

…

CREDITS

…

ffmpeg_dxva2.c

ffmpeg_dxva2: call GetDesktopWindow() in place of GetShellWindow()

2015-06-03 16:25:08 +02:00

ffmpeg_filter.c

lavfi: fix compilation with FF_API_OLD_FILTER_OPTS=0.

2015-08-18 22:22:49 -04:00

ffmpeg_opt.c

ffmpeg: Improve help text for -target.

2015-09-02 14:32:06 +02:00

ffmpeg_vdpau.c

ffmpeg_vdpau: Ignore decoder's max supported level

2015-08-16 15:02:33 -07:00

ffmpeg_videotoolbox.c

avcodec: add new Videotoolbox hwaccel.

2015-08-03 10:12:10 +02:00

ffmpeg.c

ffmpeg: Don't try and write sdp info if none of the outputs had an rtp format.

2015-11-09 23:56:29 +01:00

ffmpeg.h

ffmpeg: switch swscale option handling to AVDictionary similar to what the other subsystems use

2015-08-08 14:44:15 +02:00

ffplay.c

Put remaining pieces of CODEC_FLAG_EMU_EDGE under FF_API_EMU_EDGE.

2015-08-28 14:40:59 -04:00

ffprobe.c

ffprobe: check av_asprintf() for failure

2015-06-13 01:45:27 +02:00

ffserver_config.c

ffserver: use -b instead of -ab for setting audio bitrate.

2015-08-28 14:59:58 -04:00

ffserver_config.h

ffserver: Use singlejpeg muxer for jpeg

2015-06-08 03:36:22 +02:00

ffserver.c

ffserver: cast PID to int64_t before printing

2015-08-21 15:47:54 +02:00

INSTALL.md

…

library.mak

build: add LDLIBFLAGS

2015-07-08 14:35:02 +02:00

LICENSE.md

avfilter/vf_removegrain: add x86 and x86_64 SSE2 functions

2015-07-14 23:50:50 +00:00

MAINTAINERS

MAINTAINERS: add 2.8, drop 2.2

2015-10-08 13:15:42 +02:00

Makefile

avcodec: add new Videotoolbox hwaccel.

2015-08-03 10:12:10 +02:00

README.md

README: add ffserver

2015-02-12 11:59:22 +01:00

RELEASE

update versions for 2.8.2

2015-11-11 02:50:39 +01:00

RELEASE_NOTES

RELEASE_NOTES based on 2.7

2015-09-08 22:33:04 +02:00

version.sh

version.sh: Print versions based on the last git tag for release branches

2014-07-28 15:44:59 +02:00

README.md

FFmpeg README

FFmpeg 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.
libswresample implements audio mixing and resampling routines.
libswscale implements color conversion and scaling routines.

Tools

ffmpeg is a command line toolbox to manipulate, convert and stream multimedia content.
ffplay is a minimalistic multimedia player.
ffprobe is a simple analysis tool to inspect multimedia content.
ffserver is a multimedia streaming server for live broadcasts.
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

Coding examples are available in the doc/examples directory.

License

FFmpeg codebase is mainly LGPL-licensed with optional components licensed under GPL. Please refer to the LICENSE file for detailed information.

Languages

C 90.3%

Assembly 7.8%

Makefile 1.3%

C++ 0.2%

Objective-C 0.2%

Other 0.1%