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resample: fix off-by-one

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Don't use the previously skipped sample to calculate the remaining
amount of samples or else we remove one sample too much in some cases
and cause distortion, mostly when downsampling.

Fixes #1646
This commit is contained in:
Wim Taymans 2021-09-28 15:31:07 +02:00
parent b3646743c1
commit 4d85e6aead
1 changed files with 3 additions and 3 deletions
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6
spa/plugins/audioconvert/resample-native.c
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@ -261,10 +261,10 @@ static void impl_native_process(struct resample *r,
in = *in_len; in = *in_len;
data->func(r, src, skip, &in, dst, out, out_len); data->func(r, src, skip, &in, dst, out, out_len);
spa_log_trace_fp(r->log, "native %p: in:%d/%d out %d/%d", spa_log_trace_fp(r->log, "native %p: in:%d/%d out %d/%d skip:%d",
r, *in_len, in, *out_len, out); r, *in_len, in, *out_len, out, skip);
remain = *in_len - skip - in; remain = *in_len - in;
if (remain > 0 && remain <= n_taps) { if (remain > 0 && remain <= n_taps) {
/* not enough input data remaining for more output, /* not enough input data remaining for more output,
* copy to history */ * copy to history */