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/* Spa
*
* Copyright © 2018 Wim Taymans
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#include <math.h>
#include <errno.h>
#include <spa/param/audio/format.h>
#include "peaks-ops.h"
#include "resample.h"
struct peaks_data {
uint32_t o_count;
uint32_t i_count;
struct peaks peaks;
float max_f[];
};
static void resample_peaks_process(struct resample *r,
const void * SPA_RESTRICT src[], uint32_t *in_len,
void * SPA_RESTRICT dst[], uint32_t *out_len)
{
struct peaks_data *pd = r->data;
uint32_t c, i, o, end, chunk, i_count, o_count;
if (SPA_UNLIKELY(r->channels == 0))
return;
for (c = 0; c < r->channels; c++) {
const float *s = src[c];
float *d = dst[c], m = pd->max_f[c];
o_count = pd->o_count;
i_count = pd->i_count;
o = i = 0;
while (i < *in_len && o < *out_len) {
end = ((uint64_t) (o_count + 1)
* r->i_rate) / r->o_rate;
end = end > i_count ? end - i_count : 0;
chunk = SPA_MIN(end, *in_len);
m = peaks_abs_max(&pd->peaks, &s[i], chunk - i, m);
i += chunk;
if (i == end) {
d[o++] = m;
m = 0.0f;
o_count++;
}
}
pd->max_f[c] = m;
}
*out_len = o;
*in_len = i;
pd->o_count = o_count;
pd->i_count = i_count + i;
while (pd->i_count >= r->i_rate) {
pd->i_count -= r->i_rate;
pd->o_count -= r->o_rate;
}
}
static void impl_peaks_free(struct resample *r)
{
struct peaks_data *d = r->data;
if (d != NULL) {
peaks_free(&d->peaks);
free(d);
}
r->data = NULL;
}
static void impl_peaks_update_rate(struct resample *r, double rate)
{
}
static uint32_t impl_peaks_delay (struct resample *r)
{
return 0;
}
static uint32_t impl_peaks_in_len(struct resample *r, uint32_t out_len)
{
return out_len;
}
static void impl_peaks_reset (struct resample *r)
{
struct peaks_data *d = r->data;
d->i_count = d->o_count = 0;
}
int resample_peaks_init(struct resample *r)
{
struct peaks_data *d;
int res;
r->free = impl_peaks_free;
r->update_rate = impl_peaks_update_rate;
d = calloc(1, sizeof(struct peaks_data) + sizeof(float) * r->channels);
if (d == NULL)
return -errno;
d->peaks.log = r->log;
d->peaks.cpu_flags = r->cpu_flags;
if ((res = peaks_init(&d->peaks)) < 0) {
free(d);
return res;
}
r->data = d;
r->process = resample_peaks_process;
r->reset = impl_peaks_reset;
r->delay = impl_peaks_delay;
r->in_len = impl_peaks_in_len;
spa_log_debug(r->log, "peaks %p: in:%d out:%d features:%08x:%08x", r,
r->i_rate, r->o_rate, r->cpu_flags, d->peaks.cpu_flags);
r->cpu_flags = d->peaks.cpu_flags;
d->i_count = d->o_count = 0;
return 0;
}
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