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https://gitlab.freedesktop.org/pipewire/pipewire.git
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54 lines
1.8 KiB
C
54 lines
1.8 KiB
C
/* Spa
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*
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* Copyright © 2019 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 "resample-native-impl.h"
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static void inner_product_c(float *d, const float * SPA_RESTRICT s,
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const float * SPA_RESTRICT taps, uint32_t n_taps)
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{
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float sum = 0.0f;
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uint32_t i;
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for (i = 0; i < n_taps; i++)
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sum += s[i] * taps[i];
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*d = sum;
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}
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static void inner_product_ip_c(float *d, const float * SPA_RESTRICT s,
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const float * SPA_RESTRICT t0, const float * SPA_RESTRICT t1, float x,
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uint32_t n_taps)
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{
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float sum[2] = { 0.0f, 0.0f };
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uint32_t i;
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for (i = 0; i < n_taps; i++) {
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sum[0] += s[i] * t0[i];
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sum[1] += s[i] * t1[i];
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}
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*d = (sum[1] - sum[0]) * x + sum[0];
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}
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MAKE_RESAMPLER_COPY(c);
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MAKE_RESAMPLER_FULL(c);
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MAKE_RESAMPLER_INTER(c);
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