125 строки
4.6 KiB
Plaintext
125 строки
4.6 KiB
Plaintext
Aften TODO list
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---------------
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- Channel coupling (this will be a large undertaking)
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- E-AC-3 bitstream format and encoding
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- ABR encoding mode
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- 2-pass encoding
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- Frame parser / analyzer
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- Option to downmix/upmix/resample prior to encoding
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- 2-channel surround-matrix downmix
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- 2-channel headphone downmix
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- Stereo to 5.1 upmix
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- Improve DRC implementation
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- Psychoacoustic model & delta bit allocation
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- Gapless info using auxdata field
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- Streaming interface to libaften / internal sample buffer
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- Better error logging for libaften
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- pkg-config support or alike
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- Channel layout support in PCM decoder
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Aften Changelog
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---------------
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version SVN : current
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- added Windows x64 support (tested with Visual Studio 2008)
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- added C# bindings with simple high level API
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- changed API to simplify its usage
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- added API.txt
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- fixed aften error handling
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- fixed libaften closing in threaded mode, simplifying its usage
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- AftenContext has a new member called initial_samples.
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If 256 samples are provided here, the first frame is not padded
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with zero samples. Nevertheless, you shouldn't use this option unless
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you need perfect sync, as these first 256 samples can't properly be
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reconstructed.
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- fixed bug in wav to ac3 channel remapping
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- Multiple-file commandline input with channel designation
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- AIFF file support
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- CAFF file support
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- changed API to create a new exponent strategy decision with better quality
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and more flexibility
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- rearranged code structure of SIMD optimizations
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version 0.08 :
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- fixed piped input from FFmpeg
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- added support for MPEG channel order remapping
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- restructured audio input. enables raw pcm file support.
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- bugfixes in MMX/SSE2 code
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- stack align hack for x86 MinGW with threads
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- API changes
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- SIMD and threads usage is shown and is configurable
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- screen output gets updated every 200ms to reduce load
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- SIMD detection changed to compiler-independent inline assembly,
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thus nasm/yasm not needed anymore
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version 0.07 : 25 April 2007
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- added C++ bindings (pass -DBINDINGS_CXX=1 to cmake to build them)
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- API change of helper functions
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- new and more precise bitalloc algorithm
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- parallelization
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- optional faster exponent strategy decision
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- added SSE version of window function
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- added MMX and SSE2 versions of some exponent related functions
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- removed old build system
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- frame-independent variable bandwidth
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- minimum and maximum bandwidth settings for variable bandwidth mode
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- altivec support framework (by David Conrad)
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- altivec MDCT (by David Conrad)
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version 0.06 : 31 January 2007
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- added SSE/SSE3 mdct code (based on vorbis lancer by blacksword8192@hotmail.com)
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- added runtime SIMD detection code (Prakash Punnoor)
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- added CMake build system with shared lib/dll support
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- optional faster bit allocation by reducing accuracy/quality
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- replaced MDCT code with implementation from libvorbis
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- added Dynamic Range Compression encoding w/ profile selection
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- improved exponent strategy decision
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- accuracy increase in bit allocation
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- new longhelp option for detailed commandline info
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version 0.05 : 21 August 2006
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- bit allocation speedup by Prakash Punnoor <prakash@punnoor.de>
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- compile-time choice of using floats or doubles internally
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- internal restructuring of MDCT functions
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- more bit allocation speed-ups and bug fixes
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- quality=0 is now a valid setting
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version 0.04 : 05 August 2006
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- fixed VBR to lower quality if needed to fit in largest available frame size
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- small adjustment to exponent strategy decision
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- WAVE_FORMAT_EXTENSIBLE fix by Tebasuna
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- Alternate bit stream syntax with new commandline options
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- Better encoding structure
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- filter library
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- changed sample type from float to double
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- moved CRC code to a separate file
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- LFE low-pass filter
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- DC high-pass filter
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- bandwidth low-pass filter
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- Improved variable bandwidth selection
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- Channel bandwidth low-pass filter
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- Created separate library and frontend
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- changed default mode to CBR
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- allow for specification of max bitrate in VBR mode
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version 0.03 : 20 July 2006
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- support for WAV with sample types 8-bit, 24-bit, 32-bit, float, or double.
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- better multi-channel support, better mapping with WAV_FORMAT_EXTENSIBLE.
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- adjustments to VBR, changed default quality from 200 to 220.
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- adjustments to variable bandwidth, increased average bandwidth settings.
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version 0.02 : 09 July 2006
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- commandline options and customizable settings for:
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- mix levels
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- dialog normalization
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- dolby surround flag
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version 0.01 : 09 July 2006 (first versioned release)
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- simple configure script
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- piped input and output
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- 6-channel mapping
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- corrected defaults for mix levels
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- commandline options
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- quiet mode (no console output)
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- per-frame or average statistics
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- big-endian support
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