float VinylControlXwax::getAngle() {
double when;
float pos = timecoder_get_position(&timecoder, &when);
if (pos == -1)
return -1.0;
float rps = timecoder_revs_per_sec(&timecoder);
//invert angle to make vinyl spin direction correct
return 360 - ((int)(when * 360.0 * rps) % 360);
}
static void draw_spinner(SDL_Surface *surface, const struct rect *rect,
struct player *pl)
{
int x, y, r, c, rangle, pangle;
double elapsed, remain, rps;
Uint8 *rp, *p;
SDL_Color col;
x = rect->x;
y = rect->y;
elapsed = player_get_elapsed(pl);
remain = player_get_remain(pl);
rps = timecoder_revs_per_sec(pl->timecoder);
rangle = (int)(player_get_position(pl) * 1024 * rps) % 1024;
if (elapsed < 0 || remain < 0)
col = warn_col;
else
col = ok_col;
for (r = 0; r < spinner_size; r++) {
/* Store a pointer to this row of the framebuffer */
rp = surface->pixels + (y + r) * surface->pitch;
for (c = 0; c < spinner_size; c++) {
/* Use the lookup table to provide the angle at each
* pixel */
pangle = spinner_angle[r * spinner_size + c];
/* Calculate the final pixel location and set it */
p = rp + (x + c) * surface->format->BytesPerPixel;
if ((rangle - pangle + 1024) % 1024 < 512) {
p[0] = col.b >> 2;
p[1] = col.g >> 2;
p[2] = col.r >> 2;
} else {
p[0] = col.b;
p[1] = col.g;
p[2] = col.r;
}
}