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67 lines
2.1 KiB
C
67 lines
2.1 KiB
C
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/* 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 <speex/speex_resampler.h>
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static void impl_speex_free(struct resample *r)
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{
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if (r->data)
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speex_resampler_destroy(r->data);
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r->data = NULL;
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}
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static void impl_speex_update_rate(struct resample *r, double rate)
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{
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speex_resampler_set_rate_frac(r->data,
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r->i_rate * rate, r->o_rate, r->i_rate, r->o_rate);
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}
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static void impl_speex_process(struct resample *r, int channel,
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void *src, uint32_t *in_len, void *dst, uint32_t *out_len)
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{
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speex_resampler_process_float(r->data, channel, src, in_len, dst, out_len);
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}
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static void impl_speex_reset (struct resample *r)
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{
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}
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static int impl_speex_init(struct resample *r)
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{
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int err;
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r->free = impl_speex_free;
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r->update_rate = impl_speex_update_rate;
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r->process = impl_speex_process;
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r->reset = impl_speex_reset;
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r->data = speex_resampler_init_frac(r->channels,
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r->i_rate, r->o_rate, r->i_rate, r->o_rate,
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SPEEX_RESAMPLER_QUALITY_DEFAULT, &err);
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if (r->data == NULL) {
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return -ENOMEM;
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}
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return 0;
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}
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