24.08.2014 23:55, Peter Meerwald wrote:
04.08.2014 18:40, Peter Meerwald wrote:
+ quality_spec = soxr_quality_spec(SOXR_QQ, 0);
SOXR_QQ means "quick cubic interpolation" - i.e. the worst quality level
provided by the library. It is worse than speex-float-1 (but the message with
the relevant plots exceeded the maximum tolerable size for the list). I think
that it makes sense to expose other quality settings provided in soxr.h.
probably we need to let the user decide, but default to some reasonable
quality
Yes, even SOXR_LQ would be good enough for the definition of "good" that
doesn't take limited bandwidth into account. However, I would like to
raise one peculiar property of soxr that needs to be discussed further.
As described in the README, the soxr resampler is FFT-based (unlike,
e.g., libsamplerate, ffmpeg and speex). Therefore, it introduces more
latency than traditional resamplers - 20ms for the HQ variant vs less
than 1ms for a traditional resampler. Should PulseAudio be aware of it?
How can we make it aware?
--
Alexander E. Patrakov
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