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