mirror of
https://gitlab.freedesktop.org/pipewire/pipewire.git
synced 2025-10-31 22:25:38 -04:00
109 lines
2.8 KiB
C
109 lines
2.8 KiB
C
/* 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>
|
|
|
|
struct peaks_data {
|
|
uint32_t o_count;
|
|
uint32_t i_count;
|
|
float max_f[0];
|
|
};
|
|
|
|
#if defined (__SSE__)
|
|
#include "resample-peaks-sse.h"
|
|
#endif
|
|
|
|
static void impl_peaks_free(struct resample *r)
|
|
{
|
|
free(r->data);
|
|
r->data = NULL;
|
|
}
|
|
|
|
static void impl_peaks_update_rate(struct resample *r, double rate)
|
|
{
|
|
}
|
|
|
|
static void impl_peaks_process(struct resample *r, int channel,
|
|
void *src, uint32_t *in_len, void *dst, uint32_t *out_len)
|
|
{
|
|
struct peaks_data *pd = r->data;
|
|
float *s = src, *d = dst, m;
|
|
uint32_t i, o, end, chunk;
|
|
|
|
o = i = 0;
|
|
m = pd->max_f[channel];
|
|
|
|
while (i < *in_len && o < *out_len) {
|
|
end = ((uint64_t) (pd->o_count + 1) * r->i_rate) / r->o_rate;
|
|
end = end > pd->i_count ? end - pd->i_count : 0;
|
|
chunk = SPA_MIN(end, *in_len);
|
|
|
|
for (; i < chunk; i++)
|
|
m = SPA_MAX(fabsf(s[i]), m);
|
|
|
|
if (i == end) {
|
|
d[o++] = m;
|
|
m = 0.0f;
|
|
pd->o_count++;
|
|
}
|
|
}
|
|
pd->max_f[channel] = m;
|
|
|
|
*out_len = o;
|
|
*in_len = i;
|
|
pd->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_reset (struct resample *r)
|
|
{
|
|
struct peaks_data *d = r->data;
|
|
d->i_count = d->o_count = 0;
|
|
}
|
|
|
|
static int impl_peaks_init(struct resample *r)
|
|
{
|
|
struct peaks_data *d;
|
|
|
|
r->free = impl_peaks_free;
|
|
r->update_rate = impl_peaks_update_rate;
|
|
#if defined (__SSE__)
|
|
if (r->cpu_flags & SPA_CPU_FLAG_SSE)
|
|
r->process = impl_peaks_process_sse;
|
|
else
|
|
#endif
|
|
r->process = impl_peaks_process;
|
|
|
|
r->reset = impl_peaks_reset;
|
|
d = r->data = calloc(1, sizeof(struct peaks_data) * sizeof(float) * r->channels);
|
|
if (r->data == NULL)
|
|
return -ENOMEM;
|
|
|
|
d->i_count = d->o_count = 0;
|
|
return 0;
|
|
}
|