/*
* arecordmidi.c - record standard MIDI files from sequencer ports
*
* Copyright (c) 2004-2005 Clemens Ladisch <clemens@ladisch.de>
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/* TODO: sequencer queue timer selection */
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include <signal.h>
#include <getopt.h>
#include <poll.h>
#include <alsa/asoundlib.h>
#include "aconfig.h"
#include "version.h"
#define BUFFER_SIZE 4088
/* linked list of buffers, stores data as in the .mid file */
struct buffer {
struct buffer *next;
unsigned char buf[BUFFER_SIZE];
};
struct smf_track {
int size; /* size of entire data */
int cur_buf_size; /* size of cur_buf */
struct buffer *cur_buf;
snd_seq_tick_time_t last_tick; /* end of track */
unsigned char last_command; /* used for running status */
int used; /* anything record on this track */
struct buffer first_buf; /* list head */
};
/* timing/sysex + 16 channels */
#define TRACKS_PER_PORT 17
/* metronome settings */
/* TODO: create options for this */
#define METRONOME_CHANNEL 9
#define METRONOME_STRONG_NOTE 34
#define METRONOME_WEAK_NOTE 33
#define METRONOME_VELOCITY 100
#define METRONOME_PROGRAM 0
static snd_seq_t *seq;
static int client;
static int port_count;
static snd_seq_addr_t *ports;
static int queue;
static int smpte_timing = 0;
static int beats = 120;
static int frames;
static int ticks = 0;
static FILE *file;
static int channel_split;
static int num_tracks;
static struct smf_track *tracks;
static volatile sig_atomic_t stop = 0;
static int use_metronome = 0;
static snd_seq_addr_t metronome_port;
static int metronome_weak_note = METRONOME_WEAK_NOTE;
static int metronome_strong_note = METRONOME_STRONG_NOTE;
static int metronome_velocity = METRONOME_VELOCITY;
static int metronome_program = METRONOME_PROGRAM;
static int metronome_channel = METRONOME_CHANNEL;
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, ...)
{
va_list ap;
va_start(ap, msg);
vfprintf(stderr, msg, ap);
va_end(ap);
fputc('\n', stderr);
exit(EXIT_FAILURE);
}
/* memory allocation error handling */
static void check_mem(void *p)
{
if (!p)
fatal("Out of memory");
}
/* error handling for ALSA functions */
static void check_snd(const char *operation, int err)
{
if (err < 0)
fatal("Cannot %s - %s", operation, snd_strerror(err));
}
static void init_seq(void)
{
int err;
/* open sequencer */
err = snd_seq_open(&seq, "default", SND_SEQ_OPEN_DUPLEX, 0);
check_snd("open sequencer", err);
/* find out our client's id */
client = snd_seq_client_id(seq);
check_snd("get client id", client);
/* set our client's name */
err = snd_seq_set_client_name(seq, "arecordmidi");
check_snd("set client name", err);
}
/* parses one or more port addresses from the string */
static void parse_ports(const char *arg)
{
char *buf, *s, *port_name;
int err;
/* make a copy of the string because we're going to modify it */
buf = strdup(arg);
check_mem(buf);
for (port_name = s = buf; s; port_name = s + 1) {
/* Assume that ports are separated by commas. We don't use
* spaces because those are valid in client names. */
s = strchr(port_name, ',');
if (s)
*s = '\0';
++port_count;
ports = realloc(ports, port_count * sizeof(snd_seq_addr_t));
check_mem(ports);
err = snd_seq_parse_address(seq, &ports[port_count - 1], port_name);
if (err < 0)
fatal("Invalid port %s - %s", port_name, snd_strerror(err));
}
free(buf);
}
/* parses the metronome port address */
static void init_metronome(const char *arg)
{
int err;
err = snd_seq_parse_address(seq, &metronome_port, arg);
if (err < 0)
fatal("Invalid port %s - %s", arg, snd_strerror(err));
use_metronome = 1;
}
/* parses time signature specification */
static void time_signature(const char *arg)
{
long x = 0;
char *sep;
x = strtol(arg, &sep, 10);
if (x < 1 || x > 64 || *sep != ':')
fatal("Invalid time signature (%s)", arg);
ts_num = x;
x = strtol(++sep, NULL, 10);
if (x < 1 || x > 64)
fatal("Invalid time signature (%s)", arg);
ts_div = x;
for (ts_dd = 0; x > 1; x /= 2)
++ts_dd;
}
/*
* Metronome implementation
*/
static void metronome_note(unsigned char note, unsigned int tick)
{
snd_seq_event_t ev;
snd_seq_ev_clear(&ev);
snd_seq_ev_set_note(&ev, metronome_channel, note, metronome_velocity, 1);
snd_seq_ev_schedule_tick(&ev, queue, 0, tick);
snd_seq_ev_set_source(&ev, port_count);
snd_seq_ev_set_subs(&ev);
snd_seq_event_output(seq, &ev);
}
static void metronome_echo(unsigned int tick)
{
snd_seq_event_t ev;
snd_seq_ev_clear(&ev);
ev.type = SND_SEQ_EVENT_USR0;
snd_seq_ev_schedule_tick(&ev, queue, 0, tick);
snd_seq_ev_set_source(&ev, port_count);
snd_seq_ev_set_dest(&ev, client, port_count);
snd_seq_event_output(seq, &ev);
}
static void metronome_pattern(unsigned int tick)
{
int j, t, duration;
t = tick;
duration = ticks * 4 / ts_div;
for (j = 0; j < ts_num; j++) {
metronome_note(j ? metronome_weak_note : metronome_strong_note, t);
t += duration;
}
metronome_echo(t);
snd_seq_drain_output(seq);
}
static void metronome_set_program(void)
{
snd_seq_event_t ev;
snd_seq_ev_clear(&ev);
snd_seq_ev_set_pgmchange(&ev, metronome_channel, metronome_program);
snd_seq_ev_set_source(&ev, port_count);
snd_seq_ev_set_subs(&ev);
snd_seq_event_output(seq, &ev);
}
static void init_tracks(void)
{
int i;
/* MIDI RP-019 says we need at least one track per port */
num_tracks = port_count;
/* Allocate one track for each possible channel.
* Empty tracks won't be written to the file. */
if (channel_split)
num_tracks *= TRACKS_PER_PORT;
tracks = calloc(num_tracks, sizeof(struct smf_track));
check_mem(tracks);
for (i = 0; i < num_tracks; ++i)
tracks[i].cur_buf = &tracks[i].first_buf;
}
static void create_queue(void)
{
snd_seq_queue_tempo_t *tempo;
int err;
queue = snd_seq_alloc_named_queue(seq, "arecordmidi");
check_snd("create queue", queue);
snd_seq_queue_tempo_alloca(&tempo);
if (!smpte_timing) {
snd_seq_queue_tempo_set_tempo(tempo, 60000000 / beats);
snd_seq_queue_tempo_set_ppq(tempo, ticks);
} else {
/*
* ALSA doesn't know about the SMPTE time divisions, so
* we pretend to have a musical tempo with the equivalent
* number of ticks/s.
*/
switch (frames) {
case 24:
snd_seq_queue_tempo_set_tempo(tempo, 500000);
snd_seq_queue_tempo_set_ppq(tempo, 12 * ticks);
break;
case 25:
snd_seq_queue_tempo_set_tempo(tempo, 400000);
snd_seq_queue_tempo_set_ppq(tempo, 10 * ticks);
break;
case 29:
snd_seq_queue_tempo_set_tempo(tempo, 100000000);
snd_seq_queue_tempo_set_ppq(tempo, 2997 * ticks);
break;
case 30:
snd_seq_queue_tempo_set_tempo(tempo, 500000);
snd_seq_queue_tempo_set_ppq(tempo, 15 * ticks);
break;
default:
fatal("Invalid SMPTE frames %d", frames);
}
}
err = snd_seq_set_queue_tempo(seq, queue, tempo);
if (err < 0)
fatal("Cannot set queue tempo (%u/%i)",
snd_seq_queue_tempo_get_tempo(tempo),
snd_seq_queue_tempo_get_ppq(tempo));
}
static void create_ports(void)
{
snd_seq_port_info_t *pinfo;
int i, err;
char name[32];
snd_seq_port_info_alloca(&pinfo);
/* common information for all our ports */
snd_seq_port_info_set_capability(pinfo,
SND_SEQ_PORT_CAP_WRITE |
SND_SEQ_PORT_CAP_SUBS_WRITE);
snd_seq_port_info_set_type(pinfo,
SND_SEQ_PORT_TYPE_MIDI_GENERIC |
SND_SEQ_PORT_TYPE_APPLICATION);
snd_seq_port_info_set_midi_channels(pinfo, 16);
/* we want to know when the events got delivered to us */
snd_seq_port_info_set_timestamping(pinfo, 1);
snd_seq_port_info_set_timestamp_queue(pinfo, queue);
/* our port number is the same as our port index */
snd_seq_port_info_set_port_specified(pinfo, 1);
for (i = 0; i < port_count; ++i) {
snd_seq_port_info_set_port(pinfo, i);
sprintf(name, "arecordmidi port %i", i);
snd_seq_port_info_set_name(pinfo, name);
err = snd_seq_create_port(seq, pinfo);
check_snd("create port", err);
}
/* create an optional metronome port */
if (use_metronome) {
snd_seq_port_info_set_port(pinfo, port_count);
snd_seq_port_info_set_name(pinfo, "arecordmidi metronome");
snd_seq_port_info_set_capability(pinfo,
SND_SEQ_PORT_CAP_READ |
SND_SEQ_PORT_CAP_WRITE);
snd_seq_port_info_set_type(pinfo, SND_SEQ_PORT_TYPE_APPLICATION);
snd_seq_port_info_set_midi_channels(pinfo, 0);
snd_seq_port_info_set_timestamping(pinfo, 0);
err = snd_seq_create_port(seq, pinfo);
check_snd("create metronome port", err);
}
}
static void connect_ports(void)
{
int i, err;
for (i = 0; i < port_count; ++i) {
err = snd_seq_connect_from(seq, i, ports[i].client, ports[i].port);
if (err < 0)
fatal("Cannot connect from port %d:%d - %s",
ports[i].client, ports[i].port, snd_strerror(err));
}
/* subscribe the metronome port */
if (use_metronome) {
err = snd_seq_connect_to(seq, port_count, metronome_port.client, metronome_port.port);
if (err < 0)
fatal("Cannot connect to port %d:%d - %s",
metronome_port.client, metronome_port.port, snd_strerror(err));
}
}
/* records a byte to be written to the .mid file */
static void add_byte(struct smf_track *track, unsigned char byte)
{
/* make sure we have enough room in the current buffer */
if (track->cur_buf_size >= BUFFER_SIZE) {
track->cur_buf->next = calloc(1, sizeof(struct buffer));
if (!track->cur_buf->next)
fatal("out of memory");
track->cur_buf = track->cur_buf->next;
track->cur_buf_size = 0;
}
track->cur_buf->buf[track->cur_buf_size++] = byte;
track->size++;
}
/* record a variable-length quantity */
static void var_value(struct smf_track *track, int v)
{
if (v >= (1 << 28))
add_byte(track, 0x80 | ((v >> 28) & 0x03));
if (v >= (1 << 21))
add_byte(track, 0x80 | ((v >> 21) & 0x7f));
if (v >= (1 << 14))
add_byte(track, 0x80 | ((v >> 14) & 0x7f));
if (v >= (1 << 7))
add_byte(track, 0x80 | ((v >> 7) & 0x7f));
add_byte(track, v & 0x7f);
}
/* record the delta time from the last event */
static void delta_time(struct smf_track *track, const snd_seq_event_t *ev)
{
int diff = ev->time.tick - track->last_tick;
if (diff < 0)
diff = 0;
var_value(track, diff);
track->last_tick = ev->time.tick;
}
/* record a status byte (or not if we can use running status) */
static void command(struct smf_track *track, unsigned char cmd)
{
if (cmd != track->last_command)
add_byte(track, cmd);
track->last_command = cmd < 0xf0 ? cmd : 0;
}
/* put port numbers into all tracks */
static void record_port_numbers(void)
{
int i;
for (i = 0; i < num_tracks; ++i) {
var_value(&tracks[i], 0);
add_byte(&tracks[i], 0xff);
add_byte(&tracks[i], 0x21);
var_value(&tracks[i], 1);
if (channel_split)
add_byte(&tracks[i], i / TRACKS_PER_PORT);
else
add_byte(&tracks[i], i);
}
}
static void record_event(const snd_seq_event_t *ev)
{
unsigned int i;
struct smf_track *track;
/* ignore events without proper timestamps */
if (ev->queue != queue || !snd_seq_ev_is_tick(ev))
return;
/* determine which track to record to */
i = ev->dest.port;
if (i == port_count) {
if (ev->type == SND_SEQ_EVENT_USR0)
metronome_pattern(ev->time.tick);
return;
}
if (channel_split) {
i *= TRACKS_PER_PORT;
if (snd_seq_ev_is_channel_type(ev))
i += 1 + (ev->data.note.channel & 0xf);
}
if (i >= num_tracks)
return;
track = &tracks[i];
switch (ev->type) {
case SND_SEQ_EVENT_NOTEON:
delta_time(track, ev);
command(track, MIDI_CMD_NOTE_ON | (ev->data.note.channel & 0xf));
add_byte(track, ev->data.note.note & 0x7f);
add_byte(track, ev->data.note.velocity & 0x7f);
break;
case SND_SEQ_EVENT_NOTEOFF:
delta_time(track, ev);
command(track, MIDI_CMD_NOTE_OFF | (ev->data.note.channel & 0xf));
add_byte(track, ev->data.note.note & 0x7f);
add_byte(track, ev->data.note.velocity & 0x7f);
break;
case SND_SEQ_EVENT_KEYPRESS:
delta_time(track, ev);
command(track, MIDI_CMD_NOTE_PRESSURE | (ev->data.note.channel & 0xf));
add_byte(track, ev->data.note.note & 0x7f);
add_byte(track, ev->data.note.velocity & 0x7f);
break;
case SND_SEQ_EVENT_CONTROLLER:
delta_time(track, ev);
command(track, MIDI_CMD_CONTROL | (ev->data.control.channel & 0xf));
add_byte(track, ev->data.control.param & 0x7f);
add_byte(track, ev->data.control.value & 0x7f);
break;
case SND_SEQ_EVENT_PGMCHANGE:
delta_time(track, ev);
command(track, MIDI_CMD_PGM_CHANGE | (ev->data.control.channel & 0xf));
add_byte(track, ev->data.control.value & 0x7f);
break;
case SND_SEQ_EVENT_CHANPRESS:
delta_time(track, ev);
command(track, MIDI_CMD_CHANNEL_PRESSURE | (ev->data.control.channel & 0xf));
add_byte(track, ev->data.control.value & 0x7f);
break;
case SND_SEQ_EVENT_PITCHBEND:
delta_time(track, ev);
command(track, MIDI_CMD_BENDER | (ev->data.control.channel & 0xf));
add_byte(track, (ev->data.control.value + 8192) & 0x7f);
add_byte(track, ((ev->data.control.value + 8192) >> 7) & 0x7f);
break;
case SND_SEQ_EVENT_CONTROL14:
/* create two commands for MSB and LSB */
delta_time(track, ev);
command(track, MIDI_CMD_CONTROL | (ev->data.control.channel & 0xf));
add_byte(track, ev->data.control.param & 0x7f);
add_byte(track, (ev->data.control.value >> 7) & 0x7f);
if ((ev->data.control.param & 0x7f) < 0x20) {
delta_time(track, ev);
/* running status */
add_byte(track, (ev->data.control.param & 0x7f) + 0x20);
add_byte(track, ev->data.control.value & 0x7f);
}
break;
case SND_SEQ_EVENT_NONREGPARAM:
delta_time(track, ev);
command(track, MIDI_CMD_CONTROL | (ev->data.control.channel & 0xf));
add_byte(track, MIDI_CTL_NONREG_PARM_NUM_LSB);
add_byte(track, ev->data.control.param & 0x7f);
delta_time(track, ev);
add_byte(track, MIDI_CTL_NONREG_PARM_NUM_MSB);
add_byte(track, (ev->data.control.param >> 7) & 0x7f);
delta_time(track, ev);
add_byte(track, MIDI_CTL_MSB_DATA_ENTRY);
add_byte(track, (ev->data.control.value >> 7) & 0x7f);
delta_time(track, ev);
add_byte(track, MIDI_CTL_LSB_DATA_ENTRY);
add_byte(track, ev->data.control.value & 0x7f);
break;
case SND_SEQ_EVENT_REGPARAM:
delta_time(track, ev);
command(track, MIDI_CMD_CONTROL | (ev->data.control.channel & 0xf));
add_byte(track, MIDI_CTL_REGIST_PARM_NUM_LSB);
add_byte(track, ev->data.control.param & 0x7f);
delta_time(track, ev);
add_byte(track, MIDI_CTL_REGIST_PARM_NUM_MSB);
add_byte(track, (ev->data.control.param >> 7) & 0x7f);
delta_time(track, ev);
add_byte(track, MIDI_CTL_MSB_DATA_ENTRY);
add_byte(track, (ev->data.control.value >> 7) & 0x7f);
delta_time(track, ev);
add_byte(track, MIDI_CTL_LSB_DATA_ENTRY);
add_byte(track, ev->data.control.value & 0x7f);
break;
#if 0 /* ignore */
case SND_SEQ_EVENT_SONGPOS:
case SND_SEQ_EVENT_SONGSEL:
case SND_SEQ_EVENT_QFRAME:
case SND_SEQ_EVENT_START:
case SND_SEQ_EVENT_CONTINUE:
case SND_SEQ_EVENT_STOP:
case SND_SEQ_EVENT_TUNE_REQUEST:
case SND_SEQ_EVENT_RESET:
case SND_SEQ_EVENT_SENSING:
break;
#endif
case SND_SEQ_EVENT_SYSEX:
if (ev->data.ext.len == 0)
break;
delta_time(track, ev);
if (*(unsigned char*)ev->data.ext.ptr == 0xf0)
command(track, 0xf0), i = 1;
else
command(track, 0xf7), i = 0;
var_value(track, ev->data.ext.len - i);
for (; i < ev->data.ext.len; ++i)
add_byte(track, ((unsigned char*)ev->data.ext.ptr)[i]);
break;
default:
return;
}
track->used = 1;
}
static void finish_tracks(void)
{
snd_seq_queue_status_t *queue_status;
int tick, i, err;
snd_seq_queue_status_alloca(&queue_status);
err = snd_seq_get_queue_status(seq, queue, queue_status);
check_snd("get queue status", err);
tick = snd_seq_queue_status_get_tick_time(queue_status);
/* make length of first track the recording length */
var_value(&tracks[0], tick - tracks[0].last_tick);
add_byte(&tracks[0], 0xff);
add_byte(&tracks[0], 0x2f);
var_value(&tracks[0], 0);
/* finish other tracks */
for (i = 1; i < num_tracks; ++i) {
var_value(&tracks[i], 0);
add_byte(&tracks[i], 0xff);
add_byte(&tracks[i], 0x2f);
var_value(&tracks[i], 0);
}
}
static void write_file(void)
{
int used_tracks, time_division, i;
struct buffer *buf;
used_tracks = 0;
for (i = 0; i < num_tracks; ++i)
used_tracks += !!tracks[i].used;
/* header id and length */
fwrite("MThd\0\0\0\6", 1, 8, file);
/* type 0 or 1 */
fputc(0, file);
fputc(used_tracks > 1 ? 1 : 0, file);
/* number of tracks */
fputc((used_tracks >> 8) & 0xff, file);
fputc(used_tracks & 0xff, file);
/* time division */
time_division = ticks;
if (smpte_timing)
time_division |= (0x100 - frames) << 8;
fputc(time_division >> 8, file);
fputc(time_division & 0xff, file);
for (i = 0; i < num_tracks; ++i) {
if (!tracks[i].used)
continue;
/* track id */
fwrite("MTrk", 1, 4, file);
/* data length */
fputc((tracks[i].size >> 24) & 0xff, file);
fputc((tracks[i].size >> 16) & 0xff, file);
fputc((tracks[i].size >> 8) & 0xff, file);
fputc(tracks[i].size & 0xff, file);
/* track contents */
for (buf = &tracks[i].first_buf; buf; buf = buf->next)
fwrite(buf->buf, 1, buf == tracks[i].cur_buf
? tracks[i].cur_buf_size : BUFFER_SIZE, file);
}
}
static void list_ports(void)
{
snd_seq_client_info_t *cinfo;
snd_seq_port_info_t *pinfo;
snd_seq_client_info_alloca(&cinfo);
snd_seq_port_info_alloca(&pinfo);
puts(" Port Client name Port name");
snd_seq_client_info_set_client(cinfo, -1);
while (snd_seq_query_next_client(seq, cinfo) >= 0) {
int client = snd_seq_client_info_get_client(cinfo);
if (client == SND_SEQ_CLIENT_SYSTEM)
continue; /* don't show system timer and announce ports */
snd_seq_port_info_set_client(pinfo, client);
snd_seq_port_info_set_port(pinfo, -1);
while (snd_seq_query_next_port(seq, pinfo) >= 0) {
/* port must understand MIDI messages */
if (!(snd_seq_port_info_get_type(pinfo)
& SND_SEQ_PORT_TYPE_MIDI_GENERIC))
continue;
/* we need both READ and SUBS_READ */
if ((snd_seq_port_info_get_capability(pinfo)
& (SND_SEQ_PORT_CAP_READ | SND_SEQ_PORT_CAP_SUBS_READ))
!= (SND_SEQ_PORT_CAP_READ | SND_SEQ_PORT_CAP_SUBS_READ))
continue;
printf("%3d:%-3d %-32.32s %s\n",
snd_seq_port_info_get_client(pinfo),
snd_seq_port_info_get_port(pinfo),
snd_seq_client_info_get_name(cinfo),
snd_seq_port_info_get_name(pinfo));
}
}
}
static void help(const char *argv0)
{
fprintf(stderr, "Usage: %s [options] outputfile\n"
"\nAvailable options:\n"
" -h,--help this help\n"
" -V,--version show version\n"
" -l,--list list input ports\n"
" -p,--port=client:port,... source port(s)\n"
" -b,--bpm=beats tempo in beats per minute\n"
" -f,--fps=frames resolution in frames per second (SMPTE)\n"
" -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"
" -n,--num-events=events fixed number of events to record, then exit\n",
argv0);
}
static void version(void)
{
fputs("arecordmidi version " SND_UTIL_VERSION_STR "\n", stderr);
}
static void sighandler(int sig)
{
stop = 1;
}
int main(int argc, char *argv[])
{
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'},
{"list", 0, NULL, 'l'},
{"port", 1, NULL, 'p'},
{"bpm", 1, NULL, 'b'},
{"fps", 1, NULL, 'f'},
{"ticks", 1, NULL, 't'},
{"split-channels", 0, NULL, 's'},
{"dump", 0, NULL, 'd'},
{"metronome", 1, NULL, 'm'},
{"timesig", 1, NULL, 'i'},
{"num-events", 1, NULL, 'n'},
{0}
};
char *filename = NULL;
int do_list = 0;
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();
while ((c = getopt_long(argc, argv, short_options,
long_options, NULL)) != -1) {
switch (c) {
case 'h':
help(argv[0]);
return 0;
case 'V':
version();
return 0;
case 'l':
do_list = 1;
break;
case 'p':
parse_ports(optarg);
break;
case 'b':
beats = atoi(optarg);
if (beats < 4 || beats > 6000)
fatal("Invalid tempo");
smpte_timing = 0;
break;
case 'f':
frames = atoi(optarg);
if (frames != 24 && frames != 25 &&
frames != 29 && frames != 30)
fatal("Invalid number of frames/s");
smpte_timing = 1;
break;
case 't':
ticks = atoi(optarg);
if (ticks < 1 || ticks > 0x7fff)
fatal("Invalid number of ticks");
break;
case 's':
channel_split = 1;
break;
case 'd':
fputs("The --dump option isn't supported anymore, use aseqdump instead.\n", stderr);
break;
case 'm':
init_metronome(optarg);
break;
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;
}
}
if (do_list) {
list_ports();
return 0;
}
if (port_count < 1) {
fputs("Pleast specify a source port with --port.\n", stderr);
return 1;
}
if (!ticks)
ticks = smpte_timing ? 40 : 384;
if (smpte_timing && ticks > 0xff)
ticks = 0xff;
if (optind >= argc) {
fputs("Please specify a file to record to.\n", stderr);
return 1;
}
filename = argv[optind];
init_tracks();
create_queue();
create_ports();
connect_ports();
if (port_count > 1)
record_port_numbers();
/* record tempo */
if (!smpte_timing) {
int usecs_per_quarter = 60000000 / beats;
var_value(&tracks[0], 0); /* delta time */
add_byte(&tracks[0], 0xff);
add_byte(&tracks[0], 0x51);
var_value(&tracks[0], 3);
add_byte(&tracks[0], usecs_per_quarter >> 16);
add_byte(&tracks[0], usecs_per_quarter >> 8);
add_byte(&tracks[0], usecs_per_quarter);
/* time signature */
var_value(&tracks[0], 0); /* delta time */
add_byte(&tracks[0], 0xff);
add_byte(&tracks[0], 0x58);
var_value(&tracks[0], 4);
add_byte(&tracks[0], ts_num);
add_byte(&tracks[0], ts_dd);
add_byte(&tracks[0], 24); /* MIDI clocks per metronome click */
add_byte(&tracks[0], 8); /* notated 32nd-notes per MIDI quarter note */
}
/* always write at least one track */
tracks[0].used = 1;
file = fopen(filename, "wb");
if (!file)
fatal("Cannot open %s - %s", filename, strerror(errno));
err = snd_seq_start_queue(seq, queue, NULL);
check_snd("start queue", err);
snd_seq_drain_output(seq);
err = snd_seq_nonblock(seq, 1);
check_snd("set nonblock mode", err);
if (use_metronome) {
metronome_set_program();
metronome_pattern(0);
}
signal(SIGINT, sighandler);
signal(SIGTERM, sighandler);
npfds = snd_seq_poll_descriptors_count(seq, POLLIN);
pfds = alloca(sizeof(*pfds) * npfds);
for (;;) {
snd_seq_poll_descriptors(seq, pfds, npfds, POLLIN);
if (poll(pfds, npfds, -1) < 0)
break;
do {
snd_seq_event_t *event;
err = snd_seq_event_input(seq, &event);
if (err < 0)
break;
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();
fclose(file);
snd_seq_close(seq);
return 0;
}