diff options
| -rw-r--r-- | seq/aplaymidi/arecordmidi.c | 47 |
1 files changed, 44 insertions, 3 deletions
diff --git a/seq/aplaymidi/arecordmidi.c b/seq/aplaymidi/arecordmidi.c index 19dbb7d..c0d0569 100644 --- a/seq/aplaymidi/arecordmidi.c +++ b/seq/aplaymidi/arecordmidi.c @@ -86,6 +86,25 @@ static int ts_num = 4; /* time signature: numerator */ static int ts_div = 4; /* time signature: denominator */ static int ts_dd = 2; /* time signature: denominator as a power of two */ +/* Parse a decimal number from a command line argument. */ +static long arg_parse_decimal_num(const char *str, int *err) +{ + long val; + char *endptr; + + errno = 0; + val = strtol(str, &endptr, 0); + if (errno > 0) { + *err = -errno; + return 0; + } + if (*endptr != '\0') { + *err = -EINVAL; + return 0; + } + + return val; +} /* prints an error message to stderr, and dies */ static void fatal(const char *msg, ...) @@ -690,7 +709,8 @@ static void help(const char *argv0) " -t,--ticks=ticks resolution in ticks per beat or frame\n" " -s,--split-channels create a track for each channel\n" " -m,--metronome=client:port play a metronome signal\n" - " -i,--timesig=nn:dd time signature\n", + " -i,--timesig=nn:dd time signature\n" + " -n,--num-events=events fixed number of events to record, then exit\n", argv0); } @@ -706,7 +726,7 @@ static void sighandler(int sig) int main(int argc, char *argv[]) { - static const char short_options[] = "hVlp:b:f:t:sdm:i:"; + static const char short_options[] = "hVlp:b:f:t:sdm:i:n:"; static const struct option long_options[] = { {"help", 0, NULL, 'h'}, {"version", 0, NULL, 'V'}, @@ -719,6 +739,7 @@ int main(int argc, char *argv[]) {"dump", 0, NULL, 'd'}, {"metronome", 1, NULL, 'm'}, {"timesig", 1, NULL, 'i'}, + {"num-events", 1, NULL, 'n'}, { } }; @@ -727,6 +748,9 @@ int main(int argc, char *argv[]) struct pollfd *pfds; int npfds; int c, err; + /* If |num_events| isn't specified, leave it at 0. */ + long num_events = 0; + long events_received = 0; init_seq(); @@ -775,6 +799,16 @@ int main(int argc, char *argv[]) case 'i': time_signature(optarg); break; + case 'n': + err = 0; + num_events = arg_parse_decimal_num(optarg, &err); + if (err != 0) { + fatal("Couldn't parse num_events argument: %s\n", + strerror(-err)); + } + if (num_events <= 0) + fatal("num_events must be greater than 0"); + break; default: help(argv[0]); return 1; @@ -864,13 +898,20 @@ int main(int argc, char *argv[]) err = snd_seq_event_input(seq, &event); if (err < 0) break; - if (event) + if (event) { record_event(event); + events_received++; + } } while (err > 0); if (stop) break; + if (num_events && (events_received == num_events)) + break; } + if (num_events && events_received < num_events) + fputs("Warning: Received signal before num_events\n", stdout); + finish_tracks(); write_file(); |