diff options
Diffstat (limited to 'alsa-utils/seq/aplaymidi')
-rw-r--r-- | alsa-utils/seq/aplaymidi/Makefile.am | 5 | ||||
-rw-r--r-- | alsa-utils/seq/aplaymidi/Makefile.in | 505 | ||||
-rw-r--r-- | alsa-utils/seq/aplaymidi/aplaymidi.1 | 55 | ||||
-rw-r--r-- | alsa-utils/seq/aplaymidi/aplaymidi.c | 927 | ||||
-rw-r--r-- | alsa-utils/seq/aplaymidi/arecordmidi.1 | 82 | ||||
-rw-r--r-- | alsa-utils/seq/aplaymidi/arecordmidi.c | 880 |
6 files changed, 2454 insertions, 0 deletions
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+++ b/alsa-utils/seq/aplaymidi/aplaymidi.1 @@ -0,0 +1,55 @@ +.TH APLAYMIDI 1 "15 Feb 2004" + +.SH NAME +aplaymidi \- play Standard MIDI Files + +.SH SYNOPSIS +.B aplaymidi +\-p client:port[,...] [\-d delay] midifile ... + +.SH DESCRIPTION +.B aplaymidi +is a command-line utility that plays the specified MIDI file(s) to one +or more ALSA sequencer ports. + +.SH OPTIONS + +.TP +.I \-h, \-\-help +Prints a list of options. + +.TP +.I \-V, \-\-version +Prints the current version. + +.TP +.I \-l, \-\-list +Prints a list of possible output ports. + +.TP +.I \-p, \-\-port=client:port,... +Sets the sequencer port(s) to which the events in the MIDI file(s) are +sent. + +A client can be specified by its number, its name, or a prefix of its +name. A port is specified by its number; for port 0 of a client, the +":0" part of the port specification can be omitted. + +For compatibility with +.B pmidi(1), +the port specification is taken from the +.I ALSA_OUTPUT_PORTS +environment variable if none is given on the command line. + +.TP +.I \-d, \-\-delay=seconds +Specifies how long to wait after the end of each MIDI file, +to allow the last notes to die away. + +.SH SEE ALSO +pmidi(1) +.br +playmidi(1) + +.SH AUTHOR +Clemens Ladisch <clemens@ladisch.de> diff --git a/alsa-utils/seq/aplaymidi/aplaymidi.c b/alsa-utils/seq/aplaymidi/aplaymidi.c new file mode 100644 index 0000000..5ed7bab --- /dev/null +++ b/alsa-utils/seq/aplaymidi/aplaymidi.c @@ -0,0 +1,927 @@ +/* + * aplaymidi.c - play Standard MIDI Files to sequencer port(s) + * + * Copyright (c) 2004-2006 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +/* TODO: sequencer queue timer selection */ + +#include <stdio.h> +#include <stdlib.h> +#include <stdarg.h> +#include <string.h> +#include <getopt.h> +#include <unistd.h> +#include <alsa/asoundlib.h> +#include "aconfig.h" +#include "version.h" + +#define MIDI_BYTES_PER_SEC 3125 + +/* + * A MIDI event after being parsed/loaded from the file. + * There could be made a case for using snd_seq_event_t instead. + */ +struct event { + struct event *next; /* linked list */ + + unsigned char type; /* SND_SEQ_EVENT_xxx */ + unsigned char port; /* port index */ + unsigned int tick; + union { + unsigned char d[3]; /* channel and data bytes */ + int tempo; + unsigned int length; /* length of sysex data */ + } data; + unsigned char sysex[0]; +}; + +struct track { + struct event *first_event; /* list of all events in this track */ + int end_tick; /* length of this track */ + + struct event *current_event; /* used while loading and playing */ +}; + +static snd_seq_t *seq; +static int client; +static int port_count; +static snd_seq_addr_t *ports; +static int queue; +static int end_delay = 2; +static const char *file_name; +static FILE *file; +static int file_offset; /* current offset in input file */ +static int num_tracks; +static struct track *tracks; +static int smpte_timing; + +/* prints an error message to stderr */ +static void errormsg(const char *msg, ...) +{ + va_list ap; + + va_start(ap, msg); + vfprintf(stderr, msg, ap); + va_end(ap); + fputc('\n', stderr); +} + +/* 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); + + /* set our name (otherwise it's "Client-xxx") */ + err = snd_seq_set_client_name(seq, "aplaymidi"); + check_snd("set client name", err); + + /* find out who we actually are */ + client = snd_seq_client_id(seq); + check_snd("get client id", client); +} + +/* 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); +} + +static void create_source_port(void) +{ + snd_seq_port_info_t *pinfo; + int err; + + snd_seq_port_info_alloca(&pinfo); + + /* the first created port is 0 anyway, but let's make sure ... */ + snd_seq_port_info_set_port(pinfo, 0); + snd_seq_port_info_set_port_specified(pinfo, 1); + + snd_seq_port_info_set_name(pinfo, "aplaymidi"); + + snd_seq_port_info_set_capability(pinfo, 0); /* sic */ + snd_seq_port_info_set_type(pinfo, + SND_SEQ_PORT_TYPE_MIDI_GENERIC | + SND_SEQ_PORT_TYPE_APPLICATION); + + err = snd_seq_create_port(seq, pinfo); + check_snd("create port", err); +} + +static void create_queue(void) +{ + queue = snd_seq_alloc_named_queue(seq, "aplaymidi"); + check_snd("create queue", queue); + /* the queue is now locked, which is just fine */ +} + +static void connect_ports(void) +{ + int i, err; + + /* + * We send MIDI events with explicit destination addresses, so we don't + * need any connections to the playback ports. But we connect to those + * anyway to force any underlying RawMIDI ports to remain open while + * we're playing - otherwise, ALSA would reset the port after every + * event. + */ + for (i = 0; i < port_count; ++i) { + err = snd_seq_connect_to(seq, 0, ports[i].client, ports[i].port); + if (err < 0) + fatal("Cannot connect to port %d:%d - %s", + ports[i].client, ports[i].port, snd_strerror(err)); + } +} + +static int read_byte(void) +{ + ++file_offset; + return getc(file); +} + +/* reads a little-endian 32-bit integer */ +static int read_32_le(void) +{ + int value; + value = read_byte(); + value |= read_byte() << 8; + value |= read_byte() << 16; + value |= read_byte() << 24; + return !feof(file) ? value : -1; +} + +/* reads a 4-character identifier */ +static int read_id(void) +{ + return read_32_le(); +} +#define MAKE_ID(c1, c2, c3, c4) ((c1) | ((c2) << 8) | ((c3) << 16) | ((c4) << 24)) + +/* reads a fixed-size big-endian number */ +static int read_int(int bytes) +{ + int c, value = 0; + + do { + c = read_byte(); + if (c == EOF) + return -1; + value = (value << 8) | c; + } while (--bytes); + return value; +} + +/* reads a variable-length number */ +static int read_var(void) +{ + int value, c; + + c = read_byte(); + value = c & 0x7f; + if (c & 0x80) { + c = read_byte(); + value = (value << 7) | (c & 0x7f); + if (c & 0x80) { + c = read_byte(); + value = (value << 7) | (c & 0x7f); + if (c & 0x80) { + c = read_byte(); + value = (value << 7) | c; + if (c & 0x80) + return -1; + } + } + } + return !feof(file) ? value : -1; +} + +/* allocates a new event */ +static struct event *new_event(struct track *track, int sysex_length) +{ + struct event *event; + + event = malloc(sizeof(struct event) + sysex_length); + check_mem(event); + + event->next = NULL; + + /* append at the end of the track's linked list */ + if (track->current_event) + track->current_event->next = event; + else + track->first_event = event; + track->current_event = event; + + return event; +} + +static void skip(int bytes) +{ + while (bytes > 0) + read_byte(), --bytes; +} + +/* reads one complete track from the file */ +static int read_track(struct track *track, int track_end) +{ + int tick = 0; + unsigned char last_cmd = 0; + unsigned char port = 0; + + /* the current file position is after the track ID and length */ + while (file_offset < track_end) { + unsigned char cmd; + struct event *event; + int delta_ticks, len, c; + + delta_ticks = read_var(); + if (delta_ticks < 0) + break; + tick += delta_ticks; + + c = read_byte(); + if (c < 0) + break; + + if (c & 0x80) { + /* have command */ + cmd = c; + if (cmd < 0xf0) + last_cmd = cmd; + } else { + /* running status */ + ungetc(c, file); + file_offset--; + cmd = last_cmd; + if (!cmd) + goto _error; + } + + switch (cmd >> 4) { + /* maps SMF events to ALSA sequencer events */ + static const unsigned char cmd_type[] = { + [0x8] = SND_SEQ_EVENT_NOTEOFF, + [0x9] = SND_SEQ_EVENT_NOTEON, + [0xa] = SND_SEQ_EVENT_KEYPRESS, + [0xb] = SND_SEQ_EVENT_CONTROLLER, + [0xc] = SND_SEQ_EVENT_PGMCHANGE, + [0xd] = SND_SEQ_EVENT_CHANPRESS, + [0xe] = SND_SEQ_EVENT_PITCHBEND + }; + + case 0x8: /* channel msg with 2 parameter bytes */ + case 0x9: + case 0xa: + case 0xb: + case 0xe: + event = new_event(track, 0); + event->type = cmd_type[cmd >> 4]; + event->port = port; + event->tick = tick; + event->data.d[0] = cmd & 0x0f; + event->data.d[1] = read_byte() & 0x7f; + event->data.d[2] = read_byte() & 0x7f; + break; + + case 0xc: /* channel msg with 1 parameter byte */ + case 0xd: + event = new_event(track, 0); + event->type = cmd_type[cmd >> 4]; + event->port = port; + event->tick = tick; + event->data.d[0] = cmd & 0x0f; + event->data.d[1] = read_byte() & 0x7f; + break; + + case 0xf: + switch (cmd) { + case 0xf0: /* sysex */ + case 0xf7: /* continued sysex, or escaped commands */ + len = read_var(); + if (len < 0) + goto _error; + if (cmd == 0xf0) + ++len; + event = new_event(track, len); + event->type = SND_SEQ_EVENT_SYSEX; + event->port = port; + event->tick = tick; + event->data.length = len; + if (cmd == 0xf0) { + event->sysex[0] = 0xf0; + c = 1; + } else { + c = 0; + } + for (; c < len; ++c) + event->sysex[c] = read_byte(); + break; + + case 0xff: /* meta event */ + c = read_byte(); + len = read_var(); + if (len < 0) + goto _error; + + switch (c) { + case 0x21: /* port number */ + if (len < 1) + goto _error; + port = read_byte() % port_count; + skip(len - 1); + break; + + case 0x2f: /* end of track */ + track->end_tick = tick; + skip(track_end - file_offset); + return 1; + + case 0x51: /* tempo */ + if (len < 3) + goto _error; + if (smpte_timing) { + /* SMPTE timing doesn't change */ + skip(len); + } else { + event = new_event(track, 0); + event->type = SND_SEQ_EVENT_TEMPO; + event->port = port; + event->tick = tick; + event->data.tempo = read_byte() << 16; + event->data.tempo |= read_byte() << 8; + event->data.tempo |= read_byte(); + skip(len - 3); + } + break; + + default: /* ignore all other meta events */ + skip(len); + break; + } + break; + + default: /* invalid Fx command */ + goto _error; + } + break; + + default: /* cannot happen */ + goto _error; + } + } +_error: + errormsg("%s: invalid MIDI data (offset %#x)", file_name, file_offset); + return 0; +} + +/* reads an entire MIDI file */ +static int read_smf(void) +{ + int header_len, type, time_division, i, err; + snd_seq_queue_tempo_t *queue_tempo; + + /* the curren position is immediately after the "MThd" id */ + header_len = read_int(4); + if (header_len < 6) { +invalid_format: + errormsg("%s: invalid file format", file_name); + return 0; + } + + type = read_int(2); + if (type != 0 && type != 1) { + errormsg("%s: type %d format is not supported", file_name, type); + return 0; + } + + num_tracks = read_int(2); + if (num_tracks < 1 || num_tracks > 1000) { + errormsg("%s: invalid number of tracks (%d)", file_name, num_tracks); + num_tracks = 0; + return 0; + } + tracks = calloc(num_tracks, sizeof(struct track)); + if (!tracks) { + errormsg("out of memory"); + num_tracks = 0; + return 0; + } + + time_division = read_int(2); + if (time_division < 0) + goto invalid_format; + + /* interpret and set tempo */ + snd_seq_queue_tempo_alloca(&queue_tempo); + smpte_timing = !!(time_division & 0x8000); + if (!smpte_timing) { + /* time_division is ticks per quarter */ + snd_seq_queue_tempo_set_tempo(queue_tempo, 500000); /* default: 120 bpm */ + snd_seq_queue_tempo_set_ppq(queue_tempo, time_division); + } else { + /* upper byte is negative frames per second */ + i = 0x80 - ((time_division >> 8) & 0x7f); + /* lower byte is ticks per frame */ + time_division &= 0xff; + /* now pretend that we have quarter-note based timing */ + switch (i) { + case 24: + snd_seq_queue_tempo_set_tempo(queue_tempo, 500000); + snd_seq_queue_tempo_set_ppq(queue_tempo, 12 * time_division); + break; + case 25: + snd_seq_queue_tempo_set_tempo(queue_tempo, 400000); + snd_seq_queue_tempo_set_ppq(queue_tempo, 10 * time_division); + break; + case 29: /* 30 drop-frame */ + snd_seq_queue_tempo_set_tempo(queue_tempo, 100000000); + snd_seq_queue_tempo_set_ppq(queue_tempo, 2997 * time_division); + break; + case 30: + snd_seq_queue_tempo_set_tempo(queue_tempo, 500000); + snd_seq_queue_tempo_set_ppq(queue_tempo, 15 * time_division); + break; + default: + errormsg("%s: invalid number of SMPTE frames per second (%d)", + file_name, i); + return 0; + } + } + err = snd_seq_set_queue_tempo(seq, queue, queue_tempo); + if (err < 0) { + errormsg("Cannot set queue tempo (%u/%i)", + snd_seq_queue_tempo_get_tempo(queue_tempo), + snd_seq_queue_tempo_get_ppq(queue_tempo)); + return 0; + } + + /* read tracks */ + for (i = 0; i < num_tracks; ++i) { + int len; + + /* search for MTrk chunk */ + for (;;) { + int id = read_id(); + len = read_int(4); + if (feof(file)) { + errormsg("%s: unexpected end of file", file_name); + return 0; + } + if (len < 0 || len >= 0x10000000) { + errormsg("%s: invalid chunk length %d", file_name, len); + return 0; + } + if (id == MAKE_ID('M', 'T', 'r', 'k')) + break; + skip(len); + } + if (!read_track(&tracks[i], file_offset + len)) + return 0; + } + return 1; +} + +static int read_riff(void) +{ + /* skip file length */ + read_byte(); + read_byte(); + read_byte(); + read_byte(); + + /* check file type ("RMID" = RIFF MIDI) */ + if (read_id() != MAKE_ID('R', 'M', 'I', 'D')) { +invalid_format: + errormsg("%s: invalid file format", file_name); + return 0; + } + /* search for "data" chunk */ + for (;;) { + int id = read_id(); + int len = read_32_le(); + if (feof(file)) { +data_not_found: + errormsg("%s: data chunk not found", file_name); + return 0; + } + if (id == MAKE_ID('d', 'a', 't', 'a')) + break; + if (len < 0) + goto data_not_found; + skip((len + 1) & ~1); + } + /* the "data" chunk must contain data in SMF format */ + if (read_id() != MAKE_ID('M', 'T', 'h', 'd')) + goto invalid_format; + return read_smf(); +} + +static void cleanup_file_data(void) +{ + int i; + struct event *event; + + for (i = 0; i < num_tracks; ++i) { + event = tracks[i].first_event; + while (event) { + struct event *next = event->next; + free(event); + event = next; + } + } + num_tracks = 0; + free(tracks); + tracks = NULL; +} + +static void handle_big_sysex(snd_seq_event_t *ev) +{ + unsigned int length; + ssize_t event_size; + int err; + + length = ev->data.ext.len; + if (length > MIDI_BYTES_PER_SEC) + ev->data.ext.len = MIDI_BYTES_PER_SEC; + event_size = snd_seq_event_length(ev); + if (event_size + 1 > snd_seq_get_output_buffer_size(seq)) { + err = snd_seq_drain_output(seq); + check_snd("drain output", err); + err = snd_seq_set_output_buffer_size(seq, event_size + 1); + check_snd("set output buffer size", err); + } + while (length > MIDI_BYTES_PER_SEC) { + err = snd_seq_event_output(seq, ev); + check_snd("output event", err); + err = snd_seq_drain_output(seq); + check_snd("drain output", err); + err = snd_seq_sync_output_queue(seq); + check_snd("sync output", err); + if (sleep(1)) + fatal("aborted"); + ev->data.ext.ptr += MIDI_BYTES_PER_SEC; + length -= MIDI_BYTES_PER_SEC; + } + ev->data.ext.len = length; +} + +static void play_midi(void) +{ + snd_seq_event_t ev; + int i, max_tick, err; + + /* calculate length of the entire file */ + max_tick = -1; + for (i = 0; i < num_tracks; ++i) { + if (tracks[i].end_tick > max_tick) + max_tick = tracks[i].end_tick; + } + + /* initialize current position in each track */ + for (i = 0; i < num_tracks; ++i) + tracks[i].current_event = tracks[i].first_event; + + /* common settings for all our events */ + snd_seq_ev_clear(&ev); + ev.queue = queue; + ev.source.port = 0; + ev.flags = SND_SEQ_TIME_STAMP_TICK; + + err = snd_seq_start_queue(seq, queue, NULL); + check_snd("start queue", err); + /* The queue won't be started until the START_QUEUE event is + * actually drained to the kernel, which is exactly what we want. */ + + for (;;) { + struct event* event = NULL; + struct track* event_track = NULL; + int i, min_tick = max_tick + 1; + + /* search next event */ + for (i = 0; i < num_tracks; ++i) { + struct track *track = &tracks[i]; + struct event *e2 = track->current_event; + if (e2 && e2->tick < min_tick) { + min_tick = e2->tick; + event = e2; + event_track = track; + } + } + if (!event) + break; /* end of song reached */ + + /* advance pointer to next event */ + event_track->current_event = event->next; + + /* output the event */ + ev.type = event->type; + ev.time.tick = event->tick; + ev.dest = ports[event->port]; + switch (ev.type) { + case SND_SEQ_EVENT_NOTEON: + case SND_SEQ_EVENT_NOTEOFF: + case SND_SEQ_EVENT_KEYPRESS: + snd_seq_ev_set_fixed(&ev); + ev.data.note.channel = event->data.d[0]; + ev.data.note.note = event->data.d[1]; + ev.data.note.velocity = event->data.d[2]; + break; + case SND_SEQ_EVENT_CONTROLLER: + snd_seq_ev_set_fixed(&ev); + ev.data.control.channel = event->data.d[0]; + ev.data.control.param = event->data.d[1]; + ev.data.control.value = event->data.d[2]; + break; + case SND_SEQ_EVENT_PGMCHANGE: + case SND_SEQ_EVENT_CHANPRESS: + snd_seq_ev_set_fixed(&ev); + ev.data.control.channel = event->data.d[0]; + ev.data.control.value = event->data.d[1]; + break; + case SND_SEQ_EVENT_PITCHBEND: + snd_seq_ev_set_fixed(&ev); + ev.data.control.channel = event->data.d[0]; + ev.data.control.value = + ((event->data.d[1]) | + ((event->data.d[2]) << 7)) - 0x2000; + break; + case SND_SEQ_EVENT_SYSEX: + snd_seq_ev_set_variable(&ev, event->data.length, + event->sysex); + handle_big_sysex(&ev); + break; + case SND_SEQ_EVENT_TEMPO: + snd_seq_ev_set_fixed(&ev); + ev.dest.client = SND_SEQ_CLIENT_SYSTEM; + ev.dest.port = SND_SEQ_PORT_SYSTEM_TIMER; + ev.data.queue.queue = queue; + ev.data.queue.param.value = event->data.tempo; + break; + default: + fatal("Invalid event type %d!", ev.type); + } + + /* this blocks when the output pool has been filled */ + err = snd_seq_event_output(seq, &ev); + check_snd("output event", err); + } + + /* schedule queue stop at end of song */ + snd_seq_ev_set_fixed(&ev); + ev.type = SND_SEQ_EVENT_STOP; + ev.time.tick = max_tick; + ev.dest.client = SND_SEQ_CLIENT_SYSTEM; + ev.dest.port = SND_SEQ_PORT_SYSTEM_TIMER; + ev.data.queue.queue = queue; + err = snd_seq_event_output(seq, &ev); + check_snd("output event", err); + + /* make sure that the sequencer sees all our events */ + err = snd_seq_drain_output(seq); + check_snd("drain output", err); + + /* + * There are three possibilities how to wait until all events have + * been played: + * 1) send an event back to us (like pmidi does), and wait for it; + * 2) wait for the EVENT_STOP notification for our queue which is sent + * by the system timer port (this would require a subscription); + * 3) wait until the output pool is empty. + * The last is the simplest. + */ + err = snd_seq_sync_output_queue(seq); + check_snd("sync output", err); + + /* give the last notes time to die away */ + if (end_delay > 0) + sleep(end_delay); +} + +static void play_file(void) +{ + int ok; + + if (!strcmp(file_name, "-")) + file = stdin; + else + file = fopen(file_name, "rb"); + if (!file) { + errormsg("Cannot open %s - %s", file_name, strerror(errno)); + return; + } + + file_offset = 0; + ok = 0; + + switch (read_id()) { + case MAKE_ID('M', 'T', 'h', 'd'): + ok = read_smf(); + break; + case MAKE_ID('R', 'I', 'F', 'F'): + ok = read_riff(); + break; + default: + errormsg("%s is not a Standard MIDI File", file_name); + break; + } + + if (file != stdin) + fclose(file); + + if (ok) + play_midi(); + + cleanup_file_data(); +} + +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); + + 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 WRITE and SUBS_WRITE */ + if ((snd_seq_port_info_get_capability(pinfo) + & (SND_SEQ_PORT_CAP_WRITE | SND_SEQ_PORT_CAP_SUBS_WRITE)) + != (SND_SEQ_PORT_CAP_WRITE | SND_SEQ_PORT_CAP_SUBS_WRITE)) + 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 usage(const char *argv0) +{ + printf( + "Usage: %s -p client:port[,...] [-d delay] midifile ...\n" + "-h, --help this help\n" + "-V, --version print current version\n" + "-l, --list list all possible output ports\n" + "-p, --port=client:port,... set port(s) to play to\n" + "-d, --delay=seconds delay after song ends\n", + argv0); +} + +static void version(void) +{ + puts("aplaymidi version " SND_UTIL_VERSION_STR); +} + +int main(int argc, char *argv[]) +{ + static const char short_options[] = "hVlp:d:"; + static const struct option long_options[] = { + {"help", 0, NULL, 'h'}, + {"version", 0, NULL, 'V'}, + {"list", 0, NULL, 'l'}, + {"port", 1, NULL, 'p'}, + {"delay", 1, NULL, 'd'}, + {} + }; + int c; + int do_list = 0; + + init_seq(); + + while ((c = getopt_long(argc, argv, short_options, + long_options, NULL)) != -1) { + switch (c) { + case 'h': + usage(argv[0]); + return 0; + case 'V': + version(); + return 0; + case 'l': + do_list = 1; + break; + case 'p': + parse_ports(optarg); + break; + case 'd': + end_delay = atoi(optarg); + break; + default: + usage(argv[0]); + return 1; + } + } + + if (do_list) { + list_ports(); + } else { + if (port_count < 1) { + /* use env var for compatibility with pmidi */ + const char *ports_str = getenv("ALSA_OUTPUT_PORTS"); + if (ports_str) + parse_ports(ports_str); + if (port_count < 1) { + errormsg("Please specify at least one port with --port."); + return 1; + } + } + if (optind >= argc) { + errormsg("Please specify a file to play."); + return 1; + } + + create_source_port(); + create_queue(); + connect_ports(); + + for (; optind < argc; ++optind) { + file_name = argv[optind]; + play_file(); + } + } + snd_seq_close(seq); + return 0; +} diff --git a/alsa-utils/seq/aplaymidi/arecordmidi.1 b/alsa-utils/seq/aplaymidi/arecordmidi.1 new file mode 100644 index 0000000..78b3a3a --- /dev/null +++ b/alsa-utils/seq/aplaymidi/arecordmidi.1 @@ -0,0 +1,82 @@ +.TH ARECORDMIDI 1 "17 Sep 2007" + +.SH NAME +arecordmidi \- record Standard MIDI Files + +.SH SYNOPSIS +.B arecordmidi +\-p client:port[,...] [options] midifile + +.SH DESCRIPTION +.B arecordmidi +is a command-line utility that records a Standard MIDI File from one or +more ALSA sequencer ports. + +To stop recording, press Ctrl+C. + +.SH OPTIONS + +.TP +.I \-h,\-\-help +Prints a list of options. + +.TP +.I \-V,\-\-version +Prints the current version. + +.TP +.I \-l,\-\-list +Prints a list of possible input ports. + +.TP +.I \-p,\-\-port=client:port,... +Sets the sequencer port(s) from which events are recorded. + +A client can be specified by its number, its name, or a prefix of its +name. A port is specified by its number; for port 0 of a client, the +":0" part of the port specification can be omitted. + +.TP +.I \-b,\-\-bpm=beats +Sets the musical tempo of the MIDI file, in beats per minute. +The default value is 120 BPM. + +.TP +.I \-f,\-\-fps=frames +Sets the SMPTE resolution, in frames per second. +Possible values are 24, 25, 29.97 (for 30 drop-frame), and 30. + +.TP +.I \-t,\-\-ticks=ticks +Sets the resolution of timestamps (ticks) in the MIDI file, +in ticks per beat (when using musical tempo) or ticks per frame +(when using SMPTE timing). +The default value is 384 ticks/beat or 40 ticks/frame, respectively. + +.TP +.I \-s,\-\-split\-channels +Specifies that the data for each MIDI channel should be written to a +separate track in the MIDI file. +This will result in a "format 1" file. +Otherwise, when there is only one track, +.B arecordmidi +will generate a "format 0" file. + +.TP +.I \-m,\-\-metronome=client:port +Plays a metronome signal on the specified sequencer port. + +Metronome sounds are played on channel 10, MIDI notes 33 & 34 (GM2/GS/XG +metronome standard notes), with velocity 100 and duration 1. + +.TP +.I \-i,\-\-timesig=numerator:denominator +Sets the time signature for the MIDI file and metronome. + +The time signature is specified as usual with two numbers, representing +the numerator and denominator of the time signature as it would be +notated. The denominator must be a power of two. Both numbers should be +separated by a colon. The time signature is 4:4 by default. + +.SH AUTHOR +Clemens Ladisch <clemens@ladisch.de> diff --git a/alsa-utils/seq/aplaymidi/arecordmidi.c b/alsa-utils/seq/aplaymidi/arecordmidi.c new file mode 100644 index 0000000..9628086 --- /dev/null +++ b/alsa-utils/seq/aplaymidi/arecordmidi.c @@ -0,0 +1,880 @@ +/* + * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 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 <sys/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 */ + + +/* 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, 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", + 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:"; + 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'}, + { } + }; + + char *filename = NULL; + int do_list = 0; + struct pollfd *pfds; + int npfds; + int c, err; + + 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; + 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); + } while (err > 0); + if (stop) + break; + } + + finish_tracks(); + write_file(); + + fclose(file); + snd_seq_close(seq); + return 0; +} |