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90b1b9350c
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Janne Grunau 90b1b9350c arm: add ff_int32_to_float_fmul_array8_neon 
Quite a bit faster than int32_to_float_fmul_array8_c calling
ff_int32_to_float_fmul_scalar_neon through FmtConvertContext.
Number of cycles per int32_to_float_fmul_array8 call while decoding
padded.dts on exynos5422:

               before  after   change
cortex-a7:     1270     951    -25%
cortex-a15:     434     285    -34%

checkasm --bench cycle counts:     cortex-a15   cortex-a7
int32_to_float_fmul_array8_c:      1730.4       4384.5
int32_to_float_fmul_array8_neon_c:  571.5       1694.3
int32_to_float_fmul_array8_neon:    374.0       1448.8

Interesting are the differences between
int32_to_float_fmul_array8_neon_c and int32_to_float_fmul_array8_neon.
The former is current behaviour of calling
ff_int32_to_float_fmul_scalar_neon repeatedly from the c function,
The raw numbers differ since checkasm uses different lengths than the
dca decoder.
2015-12-14 16:45:02 +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 arm: add ff_int32_to_float_fmul_array8_neon 2015-12-14 16:45:02 +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 mpegtsenc: add flag to embed an AC-3 ES the DVB way 2015-12-14 15:16:33 +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
tests arm: add a cpu flag for the VFPv2 vector mode 2015-12-14 16:42:35 +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
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
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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
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version.sh

README.md

Libav

Build Status

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.