From 7a46c07230b8d8108c0e8e80df4522d0ac116538 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:28:17 +0200 Subject: Adding upstream version 0.3.65. Signed-off-by: Daniel Baumann --- spa/plugins/audioconvert/delay.h | 72 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 72 insertions(+) create mode 100644 spa/plugins/audioconvert/delay.h (limited to 'spa/plugins/audioconvert/delay.h') diff --git a/spa/plugins/audioconvert/delay.h b/spa/plugins/audioconvert/delay.h new file mode 100644 index 0000000..16e189f --- /dev/null +++ b/spa/plugins/audioconvert/delay.h @@ -0,0 +1,72 @@ +/* Spa + * + * Copyright © 2022 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. + */ + +#ifndef DELAY_H +#define DELAY_H + +#ifdef __cplusplus +extern "C" { +#endif + +static inline void delay_run(float *buffer, uint32_t *pos, + uint32_t n_buffer, uint32_t delay, + float *dst, const float *src, const float vol, uint32_t n_samples) +{ + uint32_t i; + uint32_t p = *pos; + + for (i = 0; i < n_samples; i++) { + buffer[p] = src[i]; + dst[i] = buffer[(p - delay) & (n_buffer-1)] * vol; + p = (p + 1) & (n_buffer-1); + } + *pos = p; +} + +static inline void delay_convolve_run(float *buffer, uint32_t *pos, + uint32_t n_buffer, uint32_t delay, + const float *taps, uint32_t n_taps, + float *dst, const float *src, const float vol, uint32_t n_samples) +{ + uint32_t i, j; + uint32_t p = *pos; + + for (i = 0; i < n_samples; i++) { + float sum = 0.0f; + + buffer[p] = src[i]; + for (j = 0; j < n_taps; j++) + sum += (taps[j] * buffer[((p - delay) - j) & (n_buffer-1)]); + dst[i] = sum * vol; + + p = (p + 1) & (n_buffer-1); + } + *pos = p; +} + +#ifdef __cplusplus +} +#endif + +#endif /* DELAY_H */ -- cgit v1.2.3