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pipewire/spa/plugins/audioconvert/delay.h

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treewide: use SPDX tags to specify copyright information SPDX tags make the licensing information easy to understand and clear, and they are machine parseable. See https://spdx.dev for more information.
2023-02-08 18:12:00 +01:00
/* Spa */
/* SPDX-FileCopyrightText: Copyright © 2022 Wim Taymans */
/* SPDX-License-Identifier: MIT */
audioconvert: add delay to rear channels when upmixing See #861
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#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;
delay: improve delay performance Use a wrap around delay ringbuffer. We can then avoid some modulo arithmetic and read more efficiently. Also handle the delay convolver case better by reversing the taps and reading the taps and delay buffer without extra overhead.
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uint32_t w = *pos;
uint32_t o = n_buffer - delay;
audioconvert: add delay to rear channels when upmixing See #861
2022-03-01 09:53:40 +01:00
for (i = 0; i < n_samples; i++) {
delay: improve delay performance Use a wrap around delay ringbuffer. We can then avoid some modulo arithmetic and read more efficiently. Also handle the delay convolver case better by reversing the taps and reading the taps and delay buffer without extra overhead.
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buffer[w] = buffer[w + n_buffer] = src[i];
dst[i] = buffer[w + o] * vol;
w = w + 1 >= n_buffer ? 0 : w + 1;
audioconvert: add delay to rear channels when upmixing See #861
2022-03-01 09:53:40 +01:00
}
delay: improve delay performance Use a wrap around delay ringbuffer. We can then avoid some modulo arithmetic and read more efficiently. Also handle the delay convolver case better by reversing the taps and reading the taps and delay buffer without extra overhead.
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*pos = w;
audioconvert: add delay to rear channels when upmixing See #861
2022-03-01 09:53:40 +01:00
}
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;
delay: improve delay performance Use a wrap around delay ringbuffer. We can then avoid some modulo arithmetic and read more efficiently. Also handle the delay convolver case better by reversing the taps and reading the taps and delay buffer without extra overhead.
2024-10-15 12:14:57 +02:00
uint32_t w = *pos;
uint32_t o = n_buffer - delay - n_taps-1;
audioconvert: add delay to rear channels when upmixing See #861
2022-03-01 09:53:40 +01:00
delay: improve delay performance Use a wrap around delay ringbuffer. We can then avoid some modulo arithmetic and read more efficiently. Also handle the delay convolver case better by reversing the taps and reading the taps and delay buffer without extra overhead.
2024-10-15 12:14:57 +02:00
if (n_taps == 1) {
delay_run(buffer, pos, n_buffer, delay, dst, src, vol, n_samples);
return;
}
audioconvert: add delay to rear channels when upmixing See #861
2022-03-01 09:53:40 +01:00
for (i = 0; i < n_samples; i++) {
float sum = 0.0f;
delay: improve delay performance Use a wrap around delay ringbuffer. We can then avoid some modulo arithmetic and read more efficiently. Also handle the delay convolver case better by reversing the taps and reading the taps and delay buffer without extra overhead.
2024-10-15 12:14:57 +02:00
buffer[w] = buffer[w + n_buffer] = src[i];
audioconvert: add delay to rear channels when upmixing See #861
2022-03-01 09:53:40 +01:00
for (j = 0; j < n_taps; j++)
delay: improve delay performance Use a wrap around delay ringbuffer. We can then avoid some modulo arithmetic and read more efficiently. Also handle the delay convolver case better by reversing the taps and reading the taps and delay buffer without extra overhead.
2024-10-15 12:14:57 +02:00
sum += taps[j] * buffer[w+o+j];
audioconvert: add delay to rear channels when upmixing See #861
2022-03-01 09:53:40 +01:00
dst[i] = sum * vol;
delay: improve delay performance Use a wrap around delay ringbuffer. We can then avoid some modulo arithmetic and read more efficiently. Also handle the delay convolver case better by reversing the taps and reading the taps and delay buffer without extra overhead.
2024-10-15 12:14:57 +02:00
w = w + 1 >= n_buffer ? 0 : w + 1;
audioconvert: add delay to rear channels when upmixing See #861
2022-03-01 09:53:40 +01:00
}
delay: improve delay performance Use a wrap around delay ringbuffer. We can then avoid some modulo arithmetic and read more efficiently. Also handle the delay convolver case better by reversing the taps and reading the taps and delay buffer without extra overhead.
2024-10-15 12:14:57 +02:00
*pos = w;
audioconvert: add delay to rear channels when upmixing See #861
2022-03-01 09:53:40 +01:00
}
#ifdef __cplusplus
}
#endif
#endif /* DELAY_H */
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