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Christophe Gisquet 3e892b2bcd x86: hevc_mc: split differently calls 
In some cases, 2 or 3 calls are performed to functions for unusual
widths. Instead, perform 2 calls for different widths to split the
workload.

The 8+16 and 4+8 widths for respectively 8 and more than 8 bits can't
be processed that way without modifications: some calls use unaligned
buffers, and having branches to handle this was resulting in no
micro-benchmark benefit.

For block_w == 12 (around 1% of the pixels of the sequence):
Before:
12758 decicycles in epel_uni, 4093 runs, 3 skips
19389 decicycles in qpel_uni, 8187 runs, 5 skips
22699 decicycles in epel_bi, 32743 runs, 25 skips
34736 decicycles in qpel_bi, 32733 runs, 35 skips

After:
11929 decicycles in epel_uni, 4096 runs, 0 skips
18131 decicycles in qpel_uni, 8184 runs, 8 skips
20065 decicycles in epel_bi, 32750 runs, 18 skips
31458 decicycles in qpel_bi, 32753 runs, 15 skips

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
2014-08-24 12:05:33 +02:00
compat Merge commit 'f929ab0569' 2014-08-15 21:00:50 +02:00
doc doc/ffmpeg: Try to clarify that the input option -r is not the same as -framerate. 2014-08-24 02:49:06 +02:00
libavcodec x86: hevc_mc: split differently calls 2014-08-24 12:05:33 +02:00
libavdevice Merge commit '8bc52dbd9d' 2014-08-19 18:33:46 +02:00
libavfilter avfilter/showcqt: add fontcolor option 2014-08-23 10:01:22 +02:00
libavformat Merge remote-tracking branch 'cehoyos/master' 2014-08-24 03:58:14 +02:00
libavresample Merge commit '11db644a8e' 2014-08-17 21:43:06 +02:00
libavutil avutil/pixelutils: faster pixelutils_sad_16x16 2014-08-23 20:12:56 +02:00
libpostproc Drop remaining unneeded != NULL 2014-08-15 22:47:45 +02:00
libswresample swresample: Add AVFrame based API 2014-08-16 20:39:37 +02:00
libswscale lsws: duplicate ff_log2_tab 2014-08-12 20:52:21 +02:00
presets presets: remove moldering iPod presets 2014-06-17 16:15:04 -08:00
tests fate: Fix ffprobe tests with --target-path set. 2014-08-24 03:04:23 +02:00
tools Merge commit '3526ab891c' 2014-08-22 21:55:27 +02:00
.gitignore avcodec: export motion vectors in frame side data on demand 2014-08-18 14:13:57 +02:00
arch.mak Merge commit '8675bcb0ad' 2014-04-07 02:15:18 +02:00
Changelog Changelog: add "H.261 RTP payload format (RFC 4587)" 2014-08-24 04:11:37 +02:00
cmdutils.c Drop remaining unneeded != NULL 2014-08-15 22:47:45 +02:00
cmdutils.h ffmpeg: add -devices param 2014-05-28 03:52:50 +02:00
cmdutils_common_opts.h ffmpeg: add -devices param 2014-05-28 03:52:50 +02:00
cmdutils_opencl.c cmdutils_opencl: Use av_malloc_array() 2014-07-01 03:49:36 +02:00
common.mak Merge commit 'afe1762654' 2014-05-20 03:33:30 +02:00
configure lavc/tiff: add support for LZMA compression 2014-08-24 01:21:39 +02:00
COPYING.GPLv2
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 CREDITS: redirect to Git log, remove current outdated content 2013-01-31 18:02:52 +01:00
ffmpeg.c Drop remaining unneeded != NULL 2014-08-15 22:47:45 +02:00
ffmpeg.h ffmpeg: remove 32 channel limit from audio_channels_map 2014-08-15 05:38:47 +02:00
ffmpeg_dxva2.c Merge commit 'a7c5fddac8' 2014-04-30 00:46:38 +02:00
ffmpeg_filter.c ffmpeg_filter: refuse to configure input without a decoder. 2014-07-30 14:40:45 +02:00
ffmpeg_opt.c Use new av_dict_set_int helper function. 2014-08-16 14:31:41 +02:00
ffmpeg_vda.c Merge commit '1839fafa95' 2014-05-12 02:44:28 +02:00
ffmpeg_vdpau.c Merge commit '7671dd7cd7' 2013-11-23 14:46:48 +01:00
ffplay.c Use new av_dict_set_int helper function. 2014-08-16 14:31:41 +02:00
ffprobe.c ffprobe: add -show_data_hash option. 2014-08-17 11:30:55 +02:00
ffserver.c ffserver: warn if config uses a system port 2014-08-17 22:51:45 -04:00
INSTALL.md INSTALL: add markdown syntax 2014-05-28 22:38:38 +02:00
library.mak Merge commit 'bb0babd705' 2014-07-22 02:45:45 +02:00
LICENSE.md lavc/flacenc: add sse4 version of the 16-bit lpc encoder 2014-08-13 01:14:47 +02:00
MAINTAINERS Add support for H.261 RTP payload format (RFC 4587) 2014-08-24 03:53:30 +02:00
Makefile Merge commit 'd45ebd4876' 2014-07-22 03:06:43 +02:00
README.md Merge commit '96ce6d6f11' 2014-08-17 21:41:55 +02:00
RELEASE Prepare for 11_beta2 Release 2014-08-23 10:12:16 -04:00
RELEASE_NOTES reset and complete RELEASE_NOTES for the next version 2014-08-13 21:03:55 +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 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

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