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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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41
spa/plugins/audioconvert/resample.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.
*/
struct resample {
uint32_t channels;
uint32_t i_rate;
uint32_t o_rate;
void (*free) (struct resample *r);
void (*update_rate) (struct resample *r, double rate);
void (*process) (struct resample *r, int channel,
void *src, uint32_t *in_len, void *dst, uint32_t *out_len);
void (*reset) (struct resample *r);
void *data;
};
#define resample_free(r) (r)->free(r)
#define resample_update_rate(r,...) (r)->update_rate(r,__VA_ARGS__)
#define resample_process(r,...) (r)->process(r,__VA_ARGS__)
#define resample_reset(r) (r)->reset(r)