static int dspio_get_output_sample(struct dspio_state *state, void *ptr,
int is16bit)
{
if (rng_count(&state->fifo_out)) {
if (is16bit) {
rng_get(&state->fifo_out, ptr);
} else {
Bit16u tmp;
rng_get(&state->fifo_out, &tmp);
*(Bit8u *) ptr = tmp;
}
return 1;
}
return 0;
}
real_t rng_uniform(rng_t* rng)
{
if (rng->vtable.uniform != NULL)
return rng->vtable.uniform(rng->context);
else
return (real_t)(1.0 * rng_get(rng) / (rng->max + 1.0));
}
Bit8u dspio_get_midi_in_byte(void *dspio)
{
Bit8u val;
int ret = rng_get(&DSPIO->midi_fifo_in, &val);
assert(ret == 1);
return val;
}
static Bit8u dspio_get_midi_data(struct dspio_state *state)
{
Bit8u val;
int ret = rng_get(&state->midi_fifo_out, &val);
assert(ret == 1);
return val;
}
static int dspio_get_dma_data(struct dspio_state *state, void *ptr, int is16bit)
{
if (sb_get_dma_data(ptr, is16bit))
return 1;
if (rng_count(&state->fifo_in)) {
if (is16bit) {
rng_get(&state->fifo_in, ptr);
} else {
Bit16u tmp;
rng_get(&state->fifo_in, &tmp);
*(Bit8u *) ptr = tmp;
}
return 1;
}
error("SB: input fifo empty\n");
return 0;
}
STATIC mp_obj_t os_urandom(mp_obj_t num) {
machine_int_t n = mp_obj_get_int(num);
byte *data;
mp_obj_t o = mp_obj_str_builder_start(&mp_type_bytes, n, &data);
for (int i = 0; i < n; i++) {
data[i] = rng_get();
}
return mp_obj_str_builder_end(o);
}
STATIC mp_obj_t os_urandom(mp_obj_t num) {
mp_int_t n = mp_obj_get_int(num);
vstr_t vstr;
vstr_init_len(&vstr, n);
for (int i = 0; i < n; i++) {
vstr.buf[i] = rng_get();
}
return mp_obj_new_str_from_vstr(&mp_type_bytes, &vstr);
}
uint32_t rng_uniform_int(rng_t* rng, uint32_t n)
{
if (rng->vtable.uniform_int != NULL)
return rng->vtable.uniform_int(rng->context, n);
else
{
uint32_t reduction_factor = rng->max / n;
return rng_get(rng) / reduction_factor;
}
}
