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Claudio Freire 8df9bf8e39 AAC encoder: refactor to resynchronize MIPS port 
This patch refactors the AAC coders to reuse code
between the MIPS port and the regular, portable C code.
There were two main functions that had to use
hand-optimized versions of quantization code:
 - search_for_quantizers_twoloop
 - codebook_trellis_rate

Those two were split into their own template header
files so they can be inlined inside both the MIPS port
and the generic code. In each context, they'll link
to their specialized implementations, and thus be
optimized by the compiler.

This approach I believe is better than maintaining
several copies of each function. As past experience has
proven, having to keep those in sync was error prone.
In this way, they will remain in sync by default.

Also, an implementation of the dequantized output
argument for the optimized quantize_and_encode
functions is included in the patch. While the current
implementation of search_for_pred still isn't using
it, future iterations of main prediction probably will.
It should not imply any measurable performance hit while
not being used.
2015-09-16 23:14:26 -03:00
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 doc/filters: ladspa: add two more examples, this time using SWH plugins 2015-09-16 09:45:59 +00:00
libavcodec AAC encoder: refactor to resynchronize MIPS port 2015-09-16 23:14:26 -03:00
libavdevice lavc: Switch bitrate to 64bit unless compatibility with avconv was requested. 2015-09-15 18:02:43 +02:00
libavfilter avfilter/af_ladspa: process all channels for nb_handles > 1 2015-09-16 09:45:59 +00:00
libavformat avformat/avidec: disable parsing for RV40 2015-09-17 02:08:15 +02:00
libavresample Merge commit 'c7247eb7fe2b95803983e8f7c4f0e904f050ca7b' 2015-09-16 11:19:36 +02:00
libavutil lavu/avstring: switch AV_ESCAPE_FLAGs to shift-based formatting 2015-09-15 00:00:57 +02:00
libpostproc Merge commit 'e88103a7f92cf27a2868b50acc8a9912f6088249' 2015-09-05 21:35:46 +02:00
libswresample Merge commit 'e88103a7f92cf27a2868b50acc8a9912f6088249' 2015-09-05 21:35:46 +02:00
libswscale swscale/swscale: silence unused function warning 2015-09-16 16:31:29 -07:00
presets presets: remove moldering iPod presets 2014-06-17 16:15:04 -08:00
tests AAC encoder: refactor to resynchronize MIPS port 2015-09-16 23:14:26 -03:00
tools Merge commit '87e5d8d78cf08b54b4a9e7cbaeff89f8c1d91b78' 2015-09-07 12:27:21 +02:00
.gitattributes Treat all '*.pnm' files as non-text file 2014-11-28 17:52:43 -05:00
.gitignore .gitignore: ignore temp files 2015-09-10 17:55:34 +02:00
.travis.yml travis: fix dependencies 2015-09-12 12:29:27 +02:00
arch.mak use mmi instead of loongson3 as simd-optimization flag 2015-07-07 03:46:57 +02:00
Changelog avfilter: add stereowiden filter 2015-09-15 09:34:22 +00:00
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 ffmpeg: replace deprecated av_log_ask_for_sample with av_log 2015-08-12 00:14:13 +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: Print large lists in more columns if the screen size allows 2015-09-16 16:22:24 -07:00
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 Merge commit '6064f697a321174232a3fad351afb21150c3e9e5' 2015-09-12 15:12:05 +02:00
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 Remove left-over FF_API_AVFILTERBUFFER cruft 2015-09-05 16:27:19 +02:00
ffprobe.c ffprobe: use AV_OPT_TYPE_BOOL for writers options 2015-09-12 17:50:22 +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 lavc: Switch bitrate to 64bit unless compatibility with avconv was requested. 2015-09-15 18:02:43 +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 2015-09-09 04:50:20 +02:00
Makefile avcodec: add new Videotoolbox hwaccel. 2015-08-03 10:12:10 +02:00
README.md README.md: avoid Github pull requests 2015-09-15 10:13:46 -08:00
RELEASE RELEASE: update to 2.8.git 2015-09-09 23:53:15 -03:00
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.

Contributing

Patches should be submitted to the ffmpeg-devel mailing list using git format-patch or git send-email. Github pull requests should be avoided because they are not part of our review process. Few developers follow pull requests so they will likely be ignored.