/* play previous song */
void prev(pid_t g_pid, link_t head)
{
link_t prevsong;
printf("===============================PRIOR MP3=============================\n");
memcpy(&prevsong, p_addr + sizeof(pid_t) + 1, 4);
prevsong = prevsong->prev;
if (prevsong == head)
{
prevsong = prevsong->prev;
}
kill(g_pid, SIGKILL);
kill(pid, SIGKILL);
wait(NULL);
startplay(&pid, prevsong, head);
}
/* play next song */
void next(pid_t g_pid, link_t head)
{
link_t nextsong;
printf("===============================NEXT MP3=============================\n");
memcpy(&nextsong, p_addr + sizeof(pid_t) + 1, 4);
nextsong = nextsong->next;
if (nextsong == head)
{
nextsong = nextsong->next;
}
kill(g_pid, SIGKILL);
kill(pid, SIGKILL);
wait(NULL);
startplay(&pid, nextsong, head);
}
void
decproc(void*)
{
Pmsg playstate, newstate;
int fd;
Pacbuf *pb;
Alt a[3] = {
{empty, &pb, CHANNOP},
{playc, &newstate.m, CHANRCV},
{nil, nil, CHANEND},
};
threadsetname("decproc");
close(srvfd[1]);
newstate.cmd = playstate.cmd = Stop;
newstate.off = playstate.off = 0;
fd = -1;
for(;;){
switch(alt(a)){
case 0:
/* Play out next buffer (pb points to one already) */
assert(fd >= 0); /* Because we must be in Play mode */
pb->m = playstate.m;
pb->len = read(fd, pb->data, sizeof pb->data);
if(pb->len > 0){
sendp(full, pb);
break;
}
if(pb->len < 0){
if(debug & DbgPlayer)
fprint(2, "pac, error: %d\n", playstate.off);
pb->cmd = Error;
pb->len = snprint(pb->data, sizeof pb->data, "%s: %r", curfile);
sendp(full, pb);
}else{
/* Simple end of file */
sendp(empty, pb); /* Don't need buffer after all */
}
close(fd);
fd = -1;
if(debug & DbgPlayer)
fprint(2, "pac, eof: %d\n", playstate.off);
/* End of file, do next by falling through */
newstate.cmd = playstate.cmd;
newstate.off = playstate.off + 1;
case 1:
if((debug & DbgPac) && newstate.cmd)
fprint(2, "Pacproc: newstate %s-%d, playstate %s-%d\n",
statetxt[newstate.cmd], newstate.off,
statetxt[playstate.cmd], playstate.off);
/* Deal with an incoming command */
if(newstate.cmd == Pause || newstate.cmd == Resume){
/* Just pass them on, don't change local state */
pb = recvp(spare);
pb->m = newstate.m;
sendp(full, pb);
break;
}
/* Stop whatever we're doing */
if(fd >= 0){
if(debug & DbgPlayer)
fprint(2, "pac, stop\n");
/* Stop any active (pac) decoders */
close(fd);
fd = -1;
}
a[0].op = CHANNOP;
switch(newstate.cmd){
default:
sysfatal("decproc: unexpected newstate %d", newstate.cmd);
case Stop:
/* Wait for state to change */
break;
case Skip:
case Play:
fd = startplay(newstate.off);
if(fd >=0){
playstate = newstate;
a[0].op = CHANRCV;
continue; /* Start reading */
}
newstate.cmd = Stop;
}
pb = recvp(spare);
pb->m = newstate.m;
sendp(full, pb);
playstate = newstate;
}
}
}
/* main */
int main(void)
{
int buttons_fd;
int key_value;
link_t head;
buttons_fd = open("/dev/key", 0);
if (buttons_fd < 0)
{
perror("open device buttons");
exit(1);
}
head = create_song_list(SONG_DIRECTORY);
if (is_empty_list(head) == 1)
{
printf("The song list is empty !\n");
destroy_list(head);
exit(1);
}
printf("===================================SONG LIST====================================\n");
traverse_list(print_songname, head);
printf("================================================================================\n");
printf("===================================FUNTION======================================\n\n");
printf(" K1:START/PAUSE K2:STOP K3:NEXT K4:PRIOR\n\n");
printf("================================================================================\n");
if ((shmid = shmget(IPC_PRIVATE, 5, PERM)) == -1)
{
perror("shmget");
exit(1);
}
p_addr = shmat(shmid, 0, 0);
memset(p_addr, '\0', 1024);
while (1)
{
fd_set rds;
int ret;
FD_ZERO(&rds);
FD_SET(buttons_fd, &rds);
ret = select(buttons_fd + 1, &rds, NULL, NULL, NULL);
if (ret < 0)
{
perror("select");
exit(1);
}
if (ret == 0)
{
printf("Timeout.\n");
}
else if (FD_ISSET(buttons_fd, &rds))
{
ret = read(buttons_fd, &key_value, sizeof key_value);
if (ret != sizeof key_value)
{
if (errno != EAGAIN)
perror("read buttons\n");
continue;
}
else
{
printf("buttons_value: %d\n", key_value + 1);
if (first_key == 1)
{
switch(key_value)
{
case 0:
startplay(&pid, head->next, head);
first_key = 0;
break;
case 1:
case 2:
case 3:
printf("=======================PRESS K1 TO START PLAY===================\n");
break;
default:
printf("=======================PRESS K1 TO START PLAY===================\n");
break;
} //end switch
}//end if(first_key)
else if(first_key == 0)
{
memcpy(&gradchild, p_addr, sizeof(pid_t));
switch(key_value)
{
case 0:
//printf("play_flag:%d\n",play_flag);
if(play_flag == 1)
{
my_pause(gradchild);
}
else
{
conti_play(gradchild);
}
break;
case 1:
my_stop(gradchild);
first_key = 1;
break;
case 2:
next(gradchild, head);
break;
case 3:
prev(gradchild, head);
break;
default:
break;
} //end switch
}//end if(!first_key)
}
}
}
destroy_list(head);
close(buttons_fd);
return 0;
}
