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Classes | |
struct | goertzel_descriptor_t |
struct | goertzel_state_t |
Functions | |
void | make_goertzel_descriptor (goertzel_descriptor_t *t, float freq, int samples) |
Create a descriptor for use with either a Goertzel transform. | |
goertzel_state_t * | goertzel_init (goertzel_state_t *s, goertzel_descriptor_t *t) |
Initialise the state of a Goertzel transform. | |
void | goertzel_reset (goertzel_state_t *s) |
Reset the state of a Goertzel transform. | |
int | goertzel_update (goertzel_state_t *s, const int16_t amp[], int samples) |
Update the state of a Goertzel transform. | |
float | goertzel_result (goertzel_state_t *s) |
Evaluate the final result of a Goertzel transform. |
goertzel_state_t* goertzel_init | ( | goertzel_state_t * | s, | |
goertzel_descriptor_t * | t | |||
) |
Initialise the state of a Goertzel transform.
s | The Goertzel context. If NULL, a context is allocated with malloc. | |
t | The Goertzel descriptor. |
void goertzel_reset | ( | goertzel_state_t * | s | ) |
Reset the state of a Goertzel transform.
s | The Goertzel context. | |
t | The Goertzel descriptor. |
float goertzel_result | ( | goertzel_state_t * | s | ) |
Evaluate the final result of a Goertzel transform.
s | The Goertzel context |
int goertzel_update | ( | goertzel_state_t * | s, | |
const int16_t | amp[], | |||
int | samples | |||
) |
Update the state of a Goertzel transform.
s | The Goertzel context | |
amp | The samples to be transformed | |
samples | The number of samples |