/**
* call-seq:
* tracks() -> array
* tracks() {|offset, length| block }
*
* Returns an array of <tt>[offset, length]</tt> tuples for each track.
*
* Offset and length are both integer values representing sectors.
* If a block is given this method returns +nil+ and instead iterates over the
* block calling the block with two arguments <tt>|offset, length|</tt>.
*
* Returns always +nil+ if no ID was yet read. The block won't be called in
* this case.
*
* You may want to use the method track_details instead of this method to
* retrieve more detailed information about the tracks.
*/
static VALUE mb_discid_tracks(VALUE self)
{
if (rb_iv_get(self, "@read") == Qfalse)
return Qnil;
else
{
DiscId *disc; /* Pointer to the disc struct */
VALUE result = rb_ary_new(); /* Array of all [offset, length] tuples */
VALUE tuple; /* Array to store one [offset, length] tuple. */
int track; /* Counter for the track number to process. */
Data_Get_Struct(self, DiscId, disc);
track = discid_get_first_track_num(disc); /* First track number */
while (track <= discid_get_last_track_num(disc))
{
tuple = rb_ary_new3(2,
INT2FIX(discid_get_track_offset(disc, track)),
INT2FIX(discid_get_track_length(disc, track)) );
if (rb_block_given_p())
rb_yield(tuple);
else
rb_ary_push(result, tuple);
track++;
}
if (rb_block_given_p())
return Qnil;
else
return result;
}
}
/**
* call-seq:
* first_track_num() -> int or nil
*
* Return the number of the first track on this disc (usually 1).
*
* Returns +nil+ if no ID was yet read.
*/
static VALUE mb_discid_first_track_num(VALUE self)
{
if (rb_iv_get(self, "@read") == Qfalse)
return Qnil;
else
{
DiscId *disc;
Data_Get_Struct(self, DiscId, disc);
return INT2FIX(discid_get_first_track_num(disc));
}
}
int main(int argc, char *argv[]) {
int i, first_track, last_track;
char *device = NULL;
char time_str[14];
int sectors;
DiscId *disc;
disc = discid_new();
/* If we have an argument, use it as the device name */
if (argc > 1) {
device = argv[1];
} else {
/* this will use discid_get_default_device() internally */
device = NULL;
}
if (discid_read_sparse(disc, device, 0) == 0) {
fprintf(stderr, "Error: %s\n", discid_get_error_msg(disc));
discid_free(disc);
return 1;
}
printf("DiscID : %s\n", discid_get_id(disc));
printf("FreeDB DiscID : %s\n", discid_get_freedb_id(disc));
first_track = discid_get_first_track_num(disc);
last_track = discid_get_last_track_num(disc);
printf("First track : %d\n", first_track);
printf("Last track : %d\n", last_track);
sectors = discid_get_sectors(disc);
sectors_to_time(sectors, ROUND_SECONDS, time_str, sizeof time_str);
printf("Length : %d sectors (%s)\n", sectors, time_str);
for ( i = first_track; i <= last_track; i++ ) {
sectors = discid_get_track_length(disc, i);
sectors_to_time(sectors, ROUND_SECONDS,
time_str, sizeof time_str);
printf("Track %-2d : %8d %8d (%s)\n",
i, discid_get_track_offset(disc, i),
sectors, time_str);
}
printf("Submit via : %s\n", discid_get_submission_url(disc));
discid_free(disc);
return 0;
}
