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/***** jack.transport.c - (c) rohan drape, 2006-2008 *****/
#include <stdlib.h>
#include <stdbool.h>
#include <math.h>
#include <time.h>
#include <curses.h>
#include <signal.h>
#include <jack/jack.h>
#include <jack/transport.h>
struct transport {
bool rolling;
double time;
double incr;
double skip;
jack_client_t *jk;
};
void finish(int sig)
{
endwin();
exit(0);
}
void shutdown(void *PTR)
{
exit(1);
}
void getcmd(const char *prompt, char *result, int n)
{
move(2,0);
addstr(prompt);
echo();
getnstr(result, n);
noecho();
halfdelay(1);
move(2,0);
clrtoeol();
}
double getnum(const char *prompt)
{
char tmp[512];
getcmd(prompt, tmp, 512);
return strtod(tmp, NULL);
}
void mvaddtime(int x, int y, double t)
{
char tmp[512];
time_t a = floor(t);
struct tm *b = gmtime(&a);
strftime(tmp, 512, "%H:%M:%S", b);
mvaddstr(x, y, tmp);
}
void locate(struct transport *t)
{
jack_nframes_t frame = t->time * jack_get_sample_rate(t->jk);
jack_transport_locate(t->jk, frame);
}
void offset(struct transport *t, double o)
{
t->time += o;
if(t->time < 0.0) {
t->time = 0.0;
}
locate(t);
}
int main(int argc, char **argv)
{
struct transport t;
t.rolling = false;
t.time = 0.0;
t.incr = 5.0;
t.skip = 60.0;
t.jk = jack_client_open("jack.transport", JackNullOption, NULL);
if(t.jk) {
jack_on_shutdown(t.jk, shutdown, 0);
jack_activate(t.jk);
} else {
fprintf(stderr, "jack.transport: could not connect to jack.\n");
exit(1);
}
signal(SIGINT, finish);
initscr();
keypad(stdscr, TRUE);
nonl();
halfdelay(1);
noecho();
while (1) {
int c;
jack_transport_state_t s;
jack_position_t p;
s = jack_transport_query(t.jk , &p);
t.rolling = s & JackTransportRolling;
t.time = (double)p.frame / (double)p.frame_rate;
c = getch();
switch(c) {
case 'r':
erase();
refresh();
break;
case ' ':
if(t.rolling) {
jack_transport_stop(t.jk);
} else {
jack_transport_start(t.jk);
}
break;
case '>':
case KEY_RIGHT:
offset(&t, t.incr);
break;
case '.':
case KEY_UP:
offset(&t, t.skip);
break;
case '<':
case KEY_LEFT:
offset(&t, -t.incr);
break;
case KEY_DOWN:
case ',':
offset(&t, -t.skip);
break;
case 'z':
case KEY_SLEFT:
t.time = 0.0;
locate(&t);
break;
case 'i':
t.incr = getnum("Set increment: ");
break;
/* A little bit clever, start typing a number to enter locate mode... */
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
ungetch(c);
case 'l':
t.time = getnum("Locate to: ");
locate(&t);
break;
case 'q':
finish(SIGINT);
break;
case ERR:
break;
}
mvaddstr(0, 0, "jack.transport - (c) rohan drape, 2006-2008");
mvaddch(1, 0, t.rolling ? ACS_RARROW : ACS_BLOCK);
mvaddtime(1, 4, t.time);
}
jack_client_close(t.jk);
endwin();
return 0;
}
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