dsp.h File Reference

Optimized DSP functions. More...

#include "zrythm-config.h"
#include <stdbool.h>
#include <stddef.h>
#include "utils/math.h"
#include "zrythm.h"
#include <glib.h>

Include dependency graph for dsp.h:

Go to the source code of this file.

Functions
NONNULL float	dsp_min (float *buf, size_t size)
	Gets the minimum of the buffer.
NONNULL float	dsp_max (float *buf, size_t size)
	Gets the maximum of the buffer.
NONNULL void	dsp_mix_add2 (float *dest, const float *src1, const float *src2, float k1, float k2, size_t size)
	Calculate dst[i] = dst[i] + src1[i] * k1 + src2[i] * k2.
NONNULL void	dsp_linear_fade_in_from (float *dest, int32_t start_offset, int32_t total_frames_to_fade, size_t size, float fade_from_multiplier)
	Calculate linear fade by multiplying from 0 to 1 for.
NONNULL void	dsp_linear_fade_out_to (float *dest, int32_t start_offset, int32_t total_frames_to_fade, size_t size, float fade_to_multiplier)
	Calculate linear fade by multiplying from 0 to 1 for.
NONNULL void	dsp_make_mono (float *l, float *r, size_t size, bool equal_power)
	Makes the two signals mono.

Detailed Description

Optimized DSP functions.

Note

More at https://github.com/DISTRHO/DPF-Max-Gen/blob/master/plugins/common/gen_dsp/genlib_ops.h#L313

Definition in file dsp.h.

Function Documentation

dsp_linear_fade_in_from()

NONNULL void dsp_linear_fade_in_from	(	float *	dest,
		int32_t	start_offset,
		int32_t	total_frames_to_fade,
		size_t	size,
		float	fade_from_multiplier )

Calculate linear fade by multiplying from 0 to 1 for.

Parameters

total_frames_to_fade

samples.

Note

Does not work properly when

Parameters

fade_from_multiplier	is < 1k.
start_offset	Start offset in the fade interval.
total_frames_to_fade	Total frames that should be faded.
size	Number of frames to process.
fade_from_multiplier	Multiplier to fade from (0 to fade from silence.)

dsp_linear_fade_out_to()

NONNULL void dsp_linear_fade_out_to	(	float *	dest,
		int32_t	start_offset,
		int32_t	total_frames_to_fade,
		size_t	size,
		float	fade_to_multiplier )

Calculate linear fade by multiplying from 0 to 1 for.

Parameters

total_frames_to_fade	samples.
start_offset	Start offset in the fade interval.
total_frames_to_fade	Total frames that should be faded.
size	Number of frames to process.
fade_to_multiplier	Multiplier to fade to (0 to fade to silence.)

dsp_make_mono()

NONNULL void dsp_make_mono	(	float *	l,
		float *	r,
		size_t	size,
		bool	equal_power )

Makes the two signals mono.

Parameters

equal_power

True for equal power, false for equal amplitude.

Note

Equal amplitude is more suitable for mono compatibility checking. For reference:

• equal power sum = (L+R) * 0.7079 (-3dB)
• equal amplitude sum = (L+R) /2 (-6.02dB)