FFmpeg audio API
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Discussion page regarding the rework of the ffmpeg audio api to acomodate the requirements needed for todays audio codecs.
Features needed
- Generalized downmixing (simd optimized)
- Codec settable downmixing coeffs, (dca and ac3 supports that, maybe other codecs also, could also be user defined)
- Output channel request function (ie, request a specified number of channels, default should be >2 mapped to 2 channels)
- Channel reordering, currently there are diffrent orders depending on the codec.
- Optimized interleaving
- Allow planer output, (don't duplicate interleaving code in every codec)
- Add support for other bitdepths then 16bits
- Ability to access one channel from a multichannel stream
Whished for features
- Add a better fft routine, maybe the KISS one
- Fixedpoint mdct/fft functions
Current ideas
Thread with previous discussions in the subject.
http://thread.gmane.org/gmane.comp.video.ffmpeg.devel/47485/focus=48097