int jth_height_percentile(struct waveform_data* d, int channel, int j) {
int index_from;
int index_to;
int i;
int height;
int arr_size;
int* arr;
int SKIP;
SKIP = 16;
index_from = (d->w->numSamples)/(d->width)*(MAX(j-2, 0));
index_to = (d->w->numSamples)/(d->width)*(MIN(j+1+2, d->width));
arr_size = (index_to-index_from)/SKIP;
arr = malloc(sizeof(int)*(arr_size));
for (i=0; i<arr_size; i++) {
arr[i] = ABS(sample_at(d->w, channel, i*SKIP+index_from));
}
qsort(arr, arr_size, sizeof(int), compare_int);
height = arr[(arr_size)*3/4];
free(arr);
return height;
}
void eeprom_write_buffer(struct sample_buffer* buffer, uint16_t pos) {
eeprom_busy_wait();
eeprom_update_word((uint16_t*) pos, buffer->count);
pos += 2;
for (uint16_t i = 0; i < buffer->count; i++) {
eeprom_busy_wait();
eeprom_update_byte((uint8_t*) pos + i, sample_at(buffer, i));
}
}
void print_sample_buffer(struct sample_buffer* buffer, FILE* stream) {
for (uint16_t i = 0; i < buffer->count; i++) {
fprintf(stream, "%02u", sample_at(buffer, i));
if (i + 1 < buffer->count) {
fputc(' ', stream);
}
if ((i + 1) % 25 == 0) {
fputc('\n', stream);
}
}
fputc('\n', stream);
fputc('\n', stream);
}
int jth_height_max(struct waveform_data* d, int channel, int j) {
int index_from;
int index_to;
int i, max;
index_from = (d->w->numSamples)/(d->width)*j;
index_to = (d->w->numSamples)/(d->width)*(j+1);
max = 0;
for (i=index_from; i<index_to; i++) {
max = MAX(max, ABS(sample_at(d->w, channel, i)));
}
return max;
}
