wavetable load fn
load 16bit pwm wavetable raw (no header) of single cycle waves. use with wave/wavetable play note: you can just load 1 wave and use as wave oscillator filename is supplied as inlet, trig to load , check outlet to see if loaded successfully
Inlets
charptr32 wavetable filename
bool32.rising trig to load
Outlets
bool32 wavetable loaded successfully
Attributes
combo number of waves
combo size of each wave
Declaration
static const uint32_t WAVESPOW = (attr_waves);
static const uint32_t SIZEPOW = (attr_size);
static const uint32_t LENGTHPOW = (attr_waves + attr_size);
static const uint32_t LENGTH = (1 << LENGTHPOW);
static const uint32_t LENGTHMASK = ((1 << LENGTHPOW) - 1);
static const uint32_t BITS = 16;
static const uint32_t GAIN = 12;
int16_t *array;
int ntrig;
int loaded = 0;
Init
static int16_t _array[attr_poly][LENGTH] __attribute__((section(".sdram")));
loaded = 0;
ntrig = 0;
array = &_array[parent->polyIndex][0];
Control Rate
if ((inlet_trig > 0) && !ntrig) {
ntrig = 1;
int i;
for (i = 0; i < LENGTH; i++)
array[i] = 0;
FIL FileObject;
FRESULT err;
UINT bytes_read;
err = f_open(&FileObject, inlet_filename, FA_READ | FA_OPEN_EXISTING);
if (err != FR_OK) {
report_fatfs_error(err, inlet_filename);
return;
}
int rem_sz = sizeof(array) * LENGTH;
int offset = 0;
while (rem_sz > 0) {
if (rem_sz > sizeof(fbuff)) {
err = f_read(&FileObject, fbuff, sizeof(fbuff), &bytes_read);
if (bytes_read == 0)
break;
memcpy((char *)(&array[0]) + offset, (char *)fbuff, bytes_read);
rem_sz -= bytes_read;
offset += bytes_read;
} else {
err = f_read(&FileObject, fbuff, rem_sz, &bytes_read);
memcpy((char *)(&array[0]) + offset, (char *)fbuff, bytes_read);
rem_sz = 0;
}
}
loaded = (err == FR_OK);
if (err != FR_OK) {
LogTextMessage("Read failed\n");
return;
}
err = f_close(&FileObject);
if (err != FR_OK) {
LogTextMessage("Close failed\n");
return;
}
} else if (!(inlet_trig > 0))
ntrig = 0;
outlet_loaded = loaded;