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resample-native: optimize equal input and output sample rates

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This commit is contained in:
Wim Taymans 2019-03-27 13:38:34 +01:00
parent 4fafd10a89
commit eaffb25cc2
3 changed files with 43 additions and 9 deletions
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22
spa/plugins/audioconvert/resample-native.h
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@ -32,7 +32,6 @@ struct native_data {
double rate;
uint32_t n_taps;
uint32_t n_phases;
uint32_t oversample;
uint32_t in_rate;
uint32_t out_rate;
uint32_t index;
@ -101,8 +100,8 @@ static int build_filter(float *taps, uint32_t stride, uint32_t n_taps, uint32_t
for (j = 0; j < n_taps12; j++, t += 1.0) {
/* exploit symmetry in filter taps */
taps[(n_phases - i) * stride + n_taps12 + j] =
taps[i * stride + (n_taps12 - j - 1)] =
cutoff * sinc(t * cutoff) * blackman(t, n_taps);
taps[i * stride + (n_taps12 - j - 1)] =
cutoff * sinc(t * cutoff) * blackman(t, n_taps);
}
}
return 0;
@ -144,15 +143,21 @@ static void impl_native_update_rate(struct resample *r, double rate)
data->inc = data->in_rate / data->out_rate;
data->frac = data->in_rate % data->out_rate;
data->func = rate == 1.0 ? do_resample_full_c : do_resample_inter_c;
if (data->in_rate == data->out_rate)
data->func = do_resample_copy_c;
else {
bool is_full = r->i_rate == in_rate;
data->func = is_full ? do_resample_full_c : do_resample_inter_c;
#if defined (__SSE__)
if (r->cpu_flags & SPA_CPU_FLAG_SSE)
data->func = rate == 1.0 ? do_resample_full_sse : do_resample_inter_sse;
if (r->cpu_flags & SPA_CPU_FLAG_SSE)
data->func = is_full ? do_resample_full_sse : do_resample_inter_sse;
#endif
#if defined (__SSSE3__)
if (r->cpu_flags & SPA_CPU_FLAG_SSSE3)
data->func = rate == 1.0 ? do_resample_full_ssse3 : do_resample_inter_ssse3;
if (r->cpu_flags & SPA_CPU_FLAG_SSSE3)
data->func = is_full ? do_resample_full_ssse3 : do_resample_inter_ssse3;
#endif
}
}
static void impl_native_process(struct resample *r,
@ -300,7 +305,6 @@ static int impl_native_init(struct resample *r)
r->data = d;
d->n_taps = n_taps;
d->n_phases = n_phases;
d->oversample = oversample;
d->in_rate = in_rate;
d->out_rate = out_rate;
d->filter = SPA_MEMBER(d, sizeof(struct native_data), float);