Michael Niedermayer
cc4a41727e
swr: fix "may be used uninitialized in this function" warnings
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The uninitialized use implicates 0 channels, which is unlikely
to reach this function but fixed anyway in this commit.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
2013-01-20 17:09:48 +01:00
Michael Niedermayer
c8737d348b
swr: work with 4 noise shaping coeffs at a time
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63->38 kcycles
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
2013-01-12 19:17:08 +01:00
Michael Niedermayer
ef7fdc8cff
swr: use a local variable for ns_coeffs
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maybe a very tiny bit faster
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
2013-01-12 17:43:29 +01:00
Michael Niedermayer
68ff7d265f
swr: use local variable for ns_errors
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71 -> 63 kcycles
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
2013-01-12 17:43:29 +01:00
Michael Niedermayer
b5d9e5d06c
swr: minor simplification for the noise shaping pos update
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Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
2013-01-12 17:43:29 +01:00
Michael Niedermayer
2eec98125e
swr: mark noise data for noise shaping as const
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Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
2013-01-10 18:07:32 +01:00
Michael Niedermayer
558aa6cab7
swr: add seperate in/out pointers to the noise shaping code
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Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
2013-01-10 18:06:19 +01:00
Michael Niedermayer
fca51256d4
swr: rename dither_pos to noise_pos
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THis more closely matches what the field represents
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
2013-01-10 18:01:26 +01:00
Michael Niedermayer
0b60fc94aa
swr: reorder the operations in the noise shaping code
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Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
2013-01-10 00:27:04 +01:00
Michael Niedermayer
3ab1970612
swr: move dither related fields to their own context
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Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
2013-01-09 18:41:12 +01:00
Michael Niedermayer
82742294b7
swr: Implement Noise shaping dither
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The following variants are implemented:
lipshitz noise shaping dither
shibata noise shaping dither
low shibata noise shaping dither
high shibata noise shaping dither
f-weighted noise shaping dither
modified-e-weighted noise shaping dither
improved-e-weighted noise shaping dither
Data tables taken from SOX
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
2013-01-09 18:25:06 +01:00
