effects.c File Reference

Go to the source code of this file.

Macros
#define	M_PI   3.14159265358979323846

Functions
float	db_to_linear (float db)
	Convert decibels to linear gain.
float	linear_to_db (float linear)
	Convert linear gain to decibels.
float	clamp_float (float value, float min, float max)
	Clamp a float value to a range.
void	compressor_init (compressor_t *comp, float sample_rate)
	Initialize a compressor.
void	compressor_set_params (compressor_t *comp, float threshold_dB, float ratio, uint64_t attack_ns, uint64_t release_ns, float makeup_dB)
	Set compressor parameters.
float	compressor_process_sample (compressor_t *comp, float sidechain)
	Process a single sample through compressor.
void	noise_gate_init (noise_gate_t *gate, float sample_rate)
	Initialize a noise gate.
void	noise_gate_set_params (noise_gate_t *gate, float threshold, uint64_t attack_ns, uint64_t release_ns, float hysteresis)
	Set noise gate parameters.
float	noise_gate_process_sample (noise_gate_t *gate, float input, float peak_amplitude)
	Process a single sample through noise gate.
void	noise_gate_process_buffer (noise_gate_t *gate, float *buffer, int num_samples)
	Process a buffer of samples through noise gate.
bool	noise_gate_is_open (const noise_gate_t *gate)
	Check if noise gate is currently open.
void	highpass_filter_init (highpass_filter_t *filter, float cutoff_hz, float sample_rate)
	Initialize a high-pass filter.
void	highpass_filter_reset (highpass_filter_t *filter)
	Reset high-pass filter state.
float	highpass_filter_process_sample (highpass_filter_t *filter, float input)
	Process a single sample through high-pass filter.
void	highpass_filter_process_buffer (highpass_filter_t *filter, float *buffer, int num_samples)
	Process a buffer of samples through high-pass filter.
void	lowpass_filter_init (lowpass_filter_t *filter, float cutoff_hz, float sample_rate)
	Initialize a low-pass filter.
void	lowpass_filter_reset (lowpass_filter_t *filter)
	Reset low-pass filter state.
float	lowpass_filter_process_sample (lowpass_filter_t *filter, float input)
	Process a single sample through low-pass filter.
void	lowpass_filter_process_buffer (lowpass_filter_t *filter, float *buffer, int num_samples)
	Process a buffer of samples through low-pass filter.
float	soft_clip (float sample, float threshold, float steepness)
	Apply soft clipping to a sample.
void	soft_clip_buffer (float *buffer, int num_samples, float threshold, float steepness)
	Apply soft clipping to a buffer.
float	smoothstep (float t)
	Compute smoothstep interpolation.
int16_t	float_to_int16 (float sample)
	Convert float sample to int16 (WebRTC format).
float	int16_to_float (int16_t sample)
	Convert int16 sample to float.
void	buffer_float_to_int16 (const float *src, int16_t *dst, int count)
	Convert float buffer to int16 buffer.
void	buffer_int16_to_float (const int16_t *src, float *dst, int count)
	Convert int16 buffer to float buffer.
float	buffer_peak (const float *buffer, int count)
	Find peak absolute value in buffer.
void	apply_gain_buffer (float *buffer, int count, float gain)
	Apply gain to buffer in-place.
void	fade_buffer (float *buffer, int count, float start_gain, float end_gain)
	Apply linear fade to buffer in-place.
void	fade_buffer_smooth (float *buffer, int count, bool fade_in)
	Apply smoothstep fade to buffer in-place.
void	copy_buffer_with_gain (const float *src, float *dst, int count, float gain)
	Copy buffer with gain scaling.

Macro Definition Documentation

M_PI

#define M_PI   3.14159265358979323846

Definition at line 6 of file effects.c.

Referenced by digital_rain_init(), highpass_filter_init(), and lowpass_filter_init().