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resample: add peaks resampler

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This commit is contained in:
Wim Taymans 2018-12-05 15:58:55 +01:00
parent e7462c470e
commit 5fa7e0f3eb
4 changed files with 236 additions and 27 deletions
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66
spa/plugins/audioconvert/resample-speex.h Normal file
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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 <speex/speex_resampler.h>
static void impl_speex_free(struct resample *r)
{
if (r->data)
speex_resampler_destroy(r->data);
r->data = NULL;
}
static void impl_speex_update_rate(struct resample *r, double rate)
{
speex_resampler_set_rate_frac(r->data,
r->i_rate * rate, r->o_rate, r->i_rate, r->o_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);
}
static void impl_speex_reset (struct resample *r)
{
}
static int impl_speex_init(struct resample *r)
{
int err;
r->free = impl_speex_free;
r->update_rate = impl_speex_update_rate;
r->process = impl_speex_process;
r->reset = impl_speex_reset;
r->data = speex_resampler_init_frac(r->channels,
r->i_rate, r->o_rate, r->i_rate, r->o_rate,
SPEEX_RESAMPLER_QUALITY_DEFAULT, &err);
if (r->data == NULL) {
return -ENOMEM;
}
return 0;
}