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filter-chain: convolver: resample IR

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Ensure correct filtering when node rate does not match filter rate
This commit is contained in:
Dmitry Sharshakov 2022-12-12 13:06:27 +03:00 • committed by Wim Taymans
parent b5c21c1fbc
commit 7950d3ff0d
2 changed files with 25 additions and 3 deletions
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2
src/modules/meson.build
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@ -100,7 +100,7 @@ filter_chain_sources = [
'module-filter-chain/convolver.c'
]
filter_chain_dependencies = [
mathlib, dl_lib, pipewire_dep, sndfile_dep
mathlib, dl_lib, pipewire_dep, sndfile_dep, audioconvert_dep
]
if lilv_lib.found()

26
src/modules/module-filter-chain/builtin_plugin.c
View file

@ -32,6 +32,7 @@
#include <spa/utils/json.h>
#include <spa/support/cpu.h>
#include <spa/plugins/audioconvert/resample.h>
#include <pipewire/log.h>
@ -635,8 +636,29 @@ static void * convolver_instantiate(const struct fc_descriptor * Descriptor,
samples = read_samples(filename, gain, delay, offset,
length, channel, &rate, &n_samples);
if (rate != SampleRate) {
pw_log_warn("Convolver samplerate %lu doesn't match filter rate %lu. "
"Consider forcing a filter rate.", rate, SampleRate);
pw_log_info("Convolver running rate %lu doesn't match filter file rate %lu, "
"resampling filter (len: %d)", SampleRate, rate, n_samples);
float *samples_original = samples;
uint32_t in_len = n_samples;
uint32_t out_len = in_len * SampleRate / rate;
samples = calloc(out_len, sizeof(float));
struct resample r;
spa_zero(r);
r.channels = 1;
r.i_rate = rate;
r.o_rate = SampleRate;
r.quality = RESAMPLE_DEFAULT_QUALITY;
if (resample_native_init(&r) < 0) {
pw_log_error("resampling failed");
return NULL;
}
resample_process(&r, (void *)&samples_original, &in_len, (void *)&samples, &out_len);
free(samples_original);
n_samples = out_len;
rate = SampleRate;
}
}
if (samples == NULL) {