Displaying 4 results from an estimated 4 matches for "somewthere".
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2014 Jun 29
4
[PATCH] stream_encoder : Improve selection of residual accumulator width
...t that does catch it.
>
> If there is no problem with the patch I'll push it.
As I see it:
FLAC 1.2.1 and 1.3.0 cannot encode snippet6.wav with -7 and -8 encoding modes.
But they are able to do this with --disable-fixed-subframes option. This
implies that snippet6.wav triggers a problem somewthere inside
FLAC__fixed_compute_residual(data[], data_len, order, residual[]) function.
And indeed, max. possible residual value is 16 times bigger than max. value
in data[] array:
residual[i] = data[i] - 4*data[i-1] + 6*data[i-2] - 4*data[i-3] + data[i-4]
16 == 2^4, so max. bps value for residu...
2014 Jun 29
0
[PATCH] stream_encoder : Improve selection of residual accumulator width
...gt; If there is no problem with the patch I'll push it.
>
> As I see it:
>
> FLAC 1.2.1 and 1.3.0 cannot encode snippet6.wav with -7 and -8 encoding modes.
> But they are able to do this with --disable-fixed-subframes option. This
> implies that snippet6.wav triggers a problem somewthere inside
> FLAC__fixed_compute_residual(data[], data_len, order, residual[]) function.
>
> And indeed, max. possible residual value is 16 times bigger than max. value
> in data[] array:
>
> residual[i] = data[i] - 4*data[i-1] + 6*data[i-2] - 4*data[i-3] + data[i-4]
>
> 16...
2014 Jun 30
2
[PATCH] stream_encoder : Improve selection of residual accumulator width
On Mon, Jun 30, 2014 at 03:27:18AM +0400, lvqcl wrote:
> lvqcl wrote:
> > FLAC 1.2.1 and 1.3.0 cannot encode snippet6.wav with -7 and -8 encoding modes.
> > But they are able to do this with --disable-fixed-subframes option. This
> > implies that snippet6.wav triggers a problem somewthere inside
> > FLAC__fixed_compute_residual(data[], data_len, order, residual[]) function.
Interestingly, -8 -l 0 seems to avoid the encoding problem too.
> > And indeed, max. possible residual value is 16 times bigger than max. value
> > in data[] array:
> >
> > re...
2014 Jun 19
7
[PATCH] stream_encoder : Improve selection of residual accumulator width
In the precompute_partition_info_sums_ function, instead of selecting
64-bit accumulator when the signal bps is larger than 16, revert to the
original approach based on partition size, but make room for few extra
bits to not overflow with unusual signals where the average residual
magnitude may be larger than bps.
It slightly improves the performance with standard encoding levels and
16-bit files