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audioconvert: implement passthrough

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Add some const and SPA_RESTRICT to methods
When the input and output is the same, work in passthrough mode
where we simply copy place the input pointer onto the output buffer
without doing a memcpy.
Do memcpy when the resampler is not active.
This commit is contained in:
Wim Taymans 2019-03-20 19:29:14 +01:00
parent 74cf412f47
commit 0505f2dc98
9 changed files with 247 additions and 167 deletions
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8
spa/plugins/audioconvert/resample-speex.h
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@ -40,7 +40,13 @@ static void impl_speex_update_rate(struct resample *r, double rate)
static void impl_speex_process(struct resample *r, int channel,
void *src, uint32_t *in_len, void *dst, uint32_t *out_len)
{
speex_resampler_process_float(r->data, channel, src, in_len, dst, out_len);
if (r->i_rate == r->o_rate) {
*out_len = *in_len = SPA_MIN(*in_len, *out_len);
spa_memcpy(dst, src, *out_len * sizeof(float));
}
else {
speex_resampler_process_float(r->data, channel, src, in_len, dst, out_len);
}
}
static void impl_speex_reset (struct resample *r)