blob: 4911ceda2a654ef1008d128f4d4a838dc202a103 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
|
#include "../libfilter/iir_filter.h"
typedef struct samplerate {
double factor;
struct {
iir_filter_t lp;
sample_t last_sample;
double in_index;
} down;
struct {
iir_filter_t lp;
sample_t current_sample;
sample_t last_sample;
double in_index;
} up;
} samplerate_t;
int init_samplerate(samplerate_t *state, double low_samplerate, double high_samplerate, double filter_cutoff);
int samplerate_downsample(samplerate_t *state, sample_t *samples, int input_num);
int samplerate_upsample(samplerate_t *state, sample_t *input, int input_num, sample_t *output);
|