mirror of
https://github.com/alsa-project/alsa-utils
synced 2024-12-22 13:36:31 +01:00
2db896afd4
We need to support older compilers than GCC 11.
Link: https://github.com/alsa-project/alsa-utils/issues/233
Fixes: 1843540
("amidi: fix the verbose compilation warnings for latest gcc")
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
763 lines
17 KiB
C
763 lines
17 KiB
C
/*
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* amidi.c - read from/write to RawMIDI ports
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*
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* Copyright (c) Clemens Ladisch <clemens@ladisch.de>
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#define _GNU_SOURCE
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#include "aconfig.h"
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#include "version.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdarg.h>
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#include <string.h>
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#include <ctype.h>
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#include <math.h>
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#include <getopt.h>
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#include <errno.h>
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#include <signal.h>
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#include <sys/timerfd.h>
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#include <sys/types.h>
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#include <poll.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <alsa/asoundlib.h>
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#include <time.h>
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#define NSEC_PER_SEC 1000000000L
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static int do_print_timestamp = 0;
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static int do_device_list, do_rawmidi_list;
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static char *port_name = "default";
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static char *send_file_name;
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static char *receive_file_name;
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static char *send_hex;
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static char *send_data;
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static int send_data_length;
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static int receive_file;
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static int dump;
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static float timeout;
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static int stop;
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static int sysex_interval;
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static snd_rawmidi_t *input, **inputp;
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static snd_rawmidi_t *output, **outputp;
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static void error(const char *format, ...)
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{
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va_list ap;
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va_start(ap, format);
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vfprintf(stderr, format, ap);
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va_end(ap);
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putc('\n', stderr);
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}
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static void usage(void)
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{
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printf(
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"Usage: amidi options\n"
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"\n"
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"-h, --help this help\n"
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"-V, --version print current version\n"
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"-l, --list-devices list all hardware ports\n"
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"-L, --list-rawmidis list all RawMIDI definitions\n"
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"-p, --port=name select port by name\n"
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"-s, --send=file send the contents of a (.syx) file\n"
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"-r, --receive=file write received data into a file\n"
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"-S, --send-hex=\"...\" send hexadecimal bytes\n"
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"-d, --dump print received data as hexadecimal bytes\n"
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"-T, --timestamp=... adds a timestamp in front of each dumped message\n"
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" realtime\n"
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" monotonic\n"
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#ifdef CLOCK_MONOTONIC_RAW
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" raw\n"
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#endif
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"-t, --timeout=seconds exits when no data has been received\n"
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" for the specified duration\n"
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"-a, --active-sensing include active sensing bytes\n"
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"-c, --clock include clock bytes\n"
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"-i, --sysex-interval=mseconds delay in between each SysEx message\n");
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}
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static void version(void)
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{
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puts("amidi version " SND_UTIL_VERSION_STR);
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}
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static void *my_malloc(size_t size)
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{
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void *p = malloc(size);
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if (!p) {
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error("out of memory");
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exit(EXIT_FAILURE);
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}
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return p;
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}
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static void list_device(snd_ctl_t *ctl, int card, int device)
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{
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snd_rawmidi_info_t *info;
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const char *name;
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const char *sub_name;
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int subs, subs_in, subs_out;
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int sub;
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int err;
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snd_rawmidi_info_alloca(&info);
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snd_rawmidi_info_set_device(info, device);
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snd_rawmidi_info_set_stream(info, SND_RAWMIDI_STREAM_INPUT);
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err = snd_ctl_rawmidi_info(ctl, info);
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if (err >= 0)
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subs_in = snd_rawmidi_info_get_subdevices_count(info);
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else
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subs_in = 0;
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snd_rawmidi_info_set_stream(info, SND_RAWMIDI_STREAM_OUTPUT);
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err = snd_ctl_rawmidi_info(ctl, info);
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if (err >= 0)
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subs_out = snd_rawmidi_info_get_subdevices_count(info);
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else
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subs_out = 0;
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subs = subs_in > subs_out ? subs_in : subs_out;
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if (!subs)
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return;
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for (sub = 0; sub < subs; ++sub) {
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snd_rawmidi_info_set_stream(info, sub < subs_in ?
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SND_RAWMIDI_STREAM_INPUT :
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SND_RAWMIDI_STREAM_OUTPUT);
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snd_rawmidi_info_set_subdevice(info, sub);
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err = snd_ctl_rawmidi_info(ctl, info);
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if (err < 0) {
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error("cannot get rawmidi information %d:%d:%d: %s\n",
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card, device, sub, snd_strerror(err));
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return;
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}
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name = snd_rawmidi_info_get_name(info);
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sub_name = snd_rawmidi_info_get_subdevice_name(info);
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if (sub == 0 && sub_name[0] == '\0') {
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printf("%c%c hw:%d,%d %s",
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sub < subs_in ? 'I' : ' ',
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sub < subs_out ? 'O' : ' ',
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card, device, name);
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if (subs > 1)
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printf(" (%d subdevices)", subs);
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putchar('\n');
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break;
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} else {
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printf("%c%c hw:%d,%d,%d %s\n",
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sub < subs_in ? 'I' : ' ',
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sub < subs_out ? 'O' : ' ',
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card, device, sub, sub_name);
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}
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}
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}
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static void list_card_devices(int card)
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{
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snd_ctl_t *ctl;
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char name[32];
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int device;
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int err;
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sprintf(name, "hw:%d", card);
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if ((err = snd_ctl_open(&ctl, name, 0)) < 0) {
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error("cannot open control for card %d: %s", card, snd_strerror(err));
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return;
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}
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device = -1;
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for (;;) {
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if ((err = snd_ctl_rawmidi_next_device(ctl, &device)) < 0) {
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error("cannot determine device number: %s", snd_strerror(err));
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break;
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}
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if (device < 0)
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break;
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list_device(ctl, card, device);
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}
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snd_ctl_close(ctl);
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}
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static void device_list(void)
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{
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int card, err;
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card = -1;
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if ((err = snd_card_next(&card)) < 0) {
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error("cannot determine card number: %s", snd_strerror(err));
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return;
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}
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if (card < 0) {
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error("no sound card found");
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return;
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}
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puts("Dir Device Name");
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do {
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list_card_devices(card);
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if ((err = snd_card_next(&card)) < 0) {
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error("cannot determine card number: %s", snd_strerror(err));
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break;
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}
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} while (card >= 0);
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}
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static void rawmidi_list(void)
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{
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snd_output_t *output;
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snd_config_t *config;
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int err;
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if ((err = snd_config_update()) < 0) {
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error("snd_config_update failed: %s", snd_strerror(err));
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return;
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}
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if ((err = snd_output_stdio_attach(&output, stdout, 0)) < 0) {
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error("snd_output_stdio_attach failed: %s", snd_strerror(err));
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return;
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}
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if (snd_config_search(snd_config, "rawmidi", &config) >= 0) {
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puts("RawMIDI list:");
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snd_config_save(config, output);
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}
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snd_output_close(output);
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}
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static int send_midi_interleaved(void)
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{
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int err;
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char *data = send_data;
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size_t buffer_size;
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snd_rawmidi_params_t *param;
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snd_rawmidi_status_t *st;
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snd_rawmidi_status_alloca(&st);
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snd_rawmidi_params_alloca(¶m);
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snd_rawmidi_params_current(output, param);
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buffer_size = snd_rawmidi_params_get_buffer_size(param);
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while (data < (send_data + send_data_length)) {
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int len = send_data + send_data_length - data;
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char *temp;
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if (data > send_data) {
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snd_rawmidi_status(output, st);
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do {
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/* 320 µs per byte as noted in Page 1 of MIDI spec */
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usleep((buffer_size - snd_rawmidi_status_get_avail(st)) * 320);
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snd_rawmidi_status(output, st);
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} while(snd_rawmidi_status_get_avail(st) < buffer_size);
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usleep(sysex_interval * 1000);
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}
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/* find end of SysEx */
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if ((temp = memchr(data, 0xf7, len)) != NULL)
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len = temp - data + 1;
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if ((err = snd_rawmidi_write(output, data, len)) < 0)
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return err;
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data += len;
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}
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return 0;
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}
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static void load_file(void)
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{
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int fd;
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off_t length;
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fd = open(send_file_name, O_RDONLY);
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if (fd == -1) {
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error("cannot open %s - %s", send_file_name, strerror(errno));
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return;
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}
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length = lseek(fd, 0, SEEK_END);
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if (length == (off_t)-1) {
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error("cannot determine length of %s: %s", send_file_name, strerror(errno));
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goto _error;
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}
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send_data = my_malloc(length);
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lseek(fd, 0, SEEK_SET);
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if (read(fd, send_data, length) != length) {
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error("cannot read from %s: %s", send_file_name, strerror(errno));
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goto _error;
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}
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if (length >= 4 && !memcmp(send_data, "MThd", 4)) {
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error("%s is a Standard MIDI File; use aplaymidi to send it", send_file_name);
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goto _error;
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}
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send_data_length = length;
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goto _exit;
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_error:
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free(send_data);
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send_data = NULL;
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_exit:
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close(fd);
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}
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static int hex_value(char c)
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{
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if ('0' <= c && c <= '9')
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return c - '0';
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if ('A' <= c && c <= 'F')
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return c - 'A' + 10;
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if ('a' <= c && c <= 'f')
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return c - 'a' + 10;
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error("invalid character %c", c);
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return -1;
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}
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static void parse_data(void)
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{
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const char *p;
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int i, value;
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send_data = my_malloc(strlen(send_hex)); /* guesstimate */
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i = 0;
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value = -1; /* value is >= 0 when the first hex digit of a byte has been read */
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for (p = send_hex; *p; ++p) {
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int digit;
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if (isspace((unsigned char)*p)) {
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if (value >= 0) {
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send_data[i++] = value;
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value = -1;
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}
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continue;
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}
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digit = hex_value(*p);
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if (digit < 0) {
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send_data = NULL;
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return;
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}
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if (value < 0) {
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value = digit;
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} else {
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send_data[i++] = (value << 4) | digit;
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value = -1;
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}
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}
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if (value >= 0)
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send_data[i++] = value;
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send_data_length = i;
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}
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/*
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* prints MIDI commands, formatting them nicely
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*/
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static void print_byte(unsigned char byte, struct timespec *ts)
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{
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static enum {
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STATE_UNKNOWN,
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STATE_1PARAM,
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STATE_1PARAM_CONTINUE,
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STATE_2PARAM_1,
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STATE_2PARAM_2,
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STATE_2PARAM_1_CONTINUE,
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STATE_SYSEX
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} state = STATE_UNKNOWN;
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int newline = 0;
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if (byte >= 0xf8)
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newline = 1;
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else if (byte >= 0xf0) {
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newline = 1;
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switch (byte) {
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case 0xf0:
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state = STATE_SYSEX;
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break;
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case 0xf1:
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case 0xf3:
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state = STATE_1PARAM;
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break;
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case 0xf2:
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state = STATE_2PARAM_1;
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break;
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case 0xf4:
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case 0xf5:
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case 0xf6:
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state = STATE_UNKNOWN;
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break;
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case 0xf7:
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newline = state != STATE_SYSEX;
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state = STATE_UNKNOWN;
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break;
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}
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} else if (byte >= 0x80) {
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newline = 1;
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if (byte >= 0xc0 && byte <= 0xdf)
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state = STATE_1PARAM;
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else
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state = STATE_2PARAM_1;
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} else /* b < 0x80 */ {
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int running_status = 0;
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newline = state == STATE_UNKNOWN;
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switch (state) {
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case STATE_1PARAM:
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state = STATE_1PARAM_CONTINUE;
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break;
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case STATE_1PARAM_CONTINUE:
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running_status = 1;
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break;
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case STATE_2PARAM_1:
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state = STATE_2PARAM_2;
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break;
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case STATE_2PARAM_2:
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state = STATE_2PARAM_1_CONTINUE;
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break;
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case STATE_2PARAM_1_CONTINUE:
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running_status = 1;
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state = STATE_2PARAM_2;
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break;
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default:
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break;
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}
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if (running_status)
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fputs("\n ", stdout);
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}
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putchar(newline ? '\n' : ' ');
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if (newline && do_print_timestamp) {
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/* Nanoseconds does not make a lot of sense for serial MIDI (the
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* 31250 bps one) but I'm not sure about MIDI over USB.
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*/
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printf("%lld.%.9ld) ", (long long)ts->tv_sec, ts->tv_nsec);
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}
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printf("%02X", byte);
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}
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static void sig_handler(int sig ATTRIBUTE_UNUSED)
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{
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stop = 1;
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}
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static void add_send_hex_data(const char *str)
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{
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int length;
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char *s;
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length = (send_hex ? strlen(send_hex) + 1 : 0) + strlen(str) + 1;
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s = my_malloc(length);
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if (send_hex) {
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strcpy(s, send_hex);
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strcat(s, " ");
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} else {
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s[0] = '\0';
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}
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strcat(s, str);
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free(send_hex);
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send_hex = s;
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}
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int main(int argc, char *argv[])
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{
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static const char short_options[] = "hVlLp:s:r:S::dt:aci:T:";
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static const struct option long_options[] = {
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{"help", 0, NULL, 'h'},
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{"version", 0, NULL, 'V'},
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{"list-devices", 0, NULL, 'l'},
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{"list-rawmidis", 0, NULL, 'L'},
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{"port", 1, NULL, 'p'},
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{"send", 1, NULL, 's'},
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{"receive", 1, NULL, 'r'},
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{"send-hex", 2, NULL, 'S'},
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{"dump", 0, NULL, 'd'},
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{"timestamp", 1, NULL, 'T'},
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{"timeout", 1, NULL, 't'},
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{"active-sensing", 0, NULL, 'a'},
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{"clock", 0, NULL, 'c'},
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{"sysex-interval", 1, NULL, 'i'},
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{0}
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};
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int c, err, ok = 0;
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int ignore_active_sensing = 1;
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int ignore_clock = 1;
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int do_send_hex = 0;
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clockid_t cid = CLOCK_REALTIME;
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struct itimerspec itimerspec = { .it_interval = { 0, 0 } };
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while ((c = getopt_long(argc, argv, short_options,
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long_options, NULL)) != -1) {
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switch (c) {
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case 'h':
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usage();
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return 0;
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case 'V':
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version();
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return 0;
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case 'l':
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do_device_list = 1;
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break;
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case 'L':
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do_rawmidi_list = 1;
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break;
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case 'p':
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port_name = optarg;
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break;
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case 's':
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send_file_name = optarg;
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break;
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case 'r':
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receive_file_name = optarg;
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break;
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case 'S':
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do_send_hex = 1;
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if (optarg)
|
|
add_send_hex_data(optarg);
|
|
break;
|
|
case 'd':
|
|
dump = 1;
|
|
break;
|
|
case 'T':
|
|
do_print_timestamp = 1;
|
|
if (optarg == NULL)
|
|
error("Clock type missing");
|
|
else if (strcasecmp(optarg, "realtime") == 0)
|
|
cid = CLOCK_REALTIME;
|
|
else if (strcasecmp(optarg, "monotonic") == 0)
|
|
cid = CLOCK_MONOTONIC;
|
|
#ifdef CLOCK_MONOTONIC_RAW
|
|
else if (strcasecmp(optarg, "raw") == 0)
|
|
cid = CLOCK_MONOTONIC_RAW;
|
|
#endif
|
|
else
|
|
error("Clock type not known");
|
|
break;
|
|
case 't':
|
|
if (optarg)
|
|
timeout = atof(optarg);
|
|
break;
|
|
case 'a':
|
|
ignore_active_sensing = 0;
|
|
break;
|
|
case 'c':
|
|
ignore_clock = 0;
|
|
break;
|
|
case 'i':
|
|
sysex_interval = atoi(optarg);
|
|
break;
|
|
default:
|
|
error("Try `amidi --help' for more information.");
|
|
return 1;
|
|
}
|
|
}
|
|
if (do_send_hex) {
|
|
/* data for -S can be specified as multiple arguments */
|
|
if (!send_hex && !argv[optind]) {
|
|
error("Please specify some data for --send-hex.");
|
|
return 1;
|
|
}
|
|
for (; argv[optind]; ++optind)
|
|
add_send_hex_data(argv[optind]);
|
|
} else {
|
|
if (argv[optind]) {
|
|
error("%s is not an option.", argv[optind]);
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
if (do_rawmidi_list)
|
|
rawmidi_list();
|
|
if (do_device_list)
|
|
device_list();
|
|
if (do_rawmidi_list || do_device_list)
|
|
return 0;
|
|
|
|
if (!send_file_name && !receive_file_name && !send_hex && !dump) {
|
|
error("Please specify at least one of --send, --receive, --send-hex, or --dump.");
|
|
return 1;
|
|
}
|
|
if (send_file_name && send_hex) {
|
|
error("--send and --send-hex cannot be specified at the same time.");
|
|
return 1;
|
|
}
|
|
|
|
if (send_file_name)
|
|
load_file();
|
|
else if (send_hex)
|
|
parse_data();
|
|
if ((send_file_name || send_hex) && !send_data)
|
|
return 1;
|
|
|
|
if (receive_file_name) {
|
|
receive_file = creat(receive_file_name, 0666);
|
|
if (receive_file == -1) {
|
|
error("cannot create %s: %s", receive_file_name, strerror(errno));
|
|
return -1;
|
|
}
|
|
} else {
|
|
receive_file = -1;
|
|
}
|
|
|
|
if (receive_file_name || dump)
|
|
inputp = &input;
|
|
else
|
|
inputp = NULL;
|
|
if (send_data)
|
|
outputp = &output;
|
|
else
|
|
outputp = NULL;
|
|
|
|
if ((err = snd_rawmidi_open(inputp, outputp, port_name, SND_RAWMIDI_NONBLOCK)) < 0) {
|
|
error("cannot open port \"%s\": %s", port_name, snd_strerror(err));
|
|
goto _exit2;
|
|
}
|
|
|
|
if (inputp)
|
|
snd_rawmidi_read(input, NULL, 0); /* trigger reading */
|
|
|
|
if (send_data) {
|
|
if ((err = snd_rawmidi_nonblock(output, 0)) < 0) {
|
|
error("cannot set blocking mode: %s", snd_strerror(err));
|
|
goto _exit;
|
|
}
|
|
if (!sysex_interval) {
|
|
if ((err = snd_rawmidi_write(output, send_data, send_data_length)) < 0) {
|
|
error("cannot send data: %s", snd_strerror(err));
|
|
return err;
|
|
}
|
|
} else {
|
|
if ((err = send_midi_interleaved()) < 0) {
|
|
error("cannot send data: %s", snd_strerror(err));
|
|
return err;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (inputp) {
|
|
int read = 0;
|
|
int npfds;
|
|
struct pollfd *pfds;
|
|
|
|
npfds = 1 + snd_rawmidi_poll_descriptors_count(input);
|
|
pfds = alloca(npfds * sizeof(struct pollfd));
|
|
|
|
if (timeout > 0) {
|
|
pfds[0].fd = timerfd_create(CLOCK_MONOTONIC, 0);
|
|
if (pfds[0].fd == -1) {
|
|
error("cannot create timer: %s", strerror(errno));
|
|
goto _exit;
|
|
}
|
|
pfds[0].events = POLLIN;
|
|
} else {
|
|
pfds[0].fd = -1;
|
|
}
|
|
|
|
snd_rawmidi_poll_descriptors(input, &pfds[1], npfds - 1);
|
|
|
|
signal(SIGINT, sig_handler);
|
|
|
|
if (timeout > 0) {
|
|
float timeout_int;
|
|
|
|
itimerspec.it_value.tv_nsec = modff(timeout, &timeout_int) * NSEC_PER_SEC;
|
|
itimerspec.it_value.tv_sec = timeout_int;
|
|
err = timerfd_settime(pfds[0].fd, 0, &itimerspec, NULL);
|
|
if (err < 0) {
|
|
error("cannot set timer: %s", strerror(errno));
|
|
goto _exit;
|
|
}
|
|
}
|
|
|
|
for (;;) {
|
|
unsigned char buf[256];
|
|
int i, length;
|
|
unsigned short revents;
|
|
struct timespec ts;
|
|
|
|
err = poll(pfds, npfds, -1);
|
|
if (stop || (err < 0 && errno == EINTR))
|
|
break;
|
|
if (err < 0) {
|
|
error("poll failed: %s", strerror(errno));
|
|
break;
|
|
}
|
|
|
|
if (clock_gettime(cid, &ts) < 0) {
|
|
error("clock_getres (%d) failed: %s", cid, strerror(errno));
|
|
break;
|
|
}
|
|
|
|
err = snd_rawmidi_poll_descriptors_revents(input, &pfds[1], npfds - 1, &revents);
|
|
if (err < 0) {
|
|
error("cannot get poll events: %s", snd_strerror(errno));
|
|
break;
|
|
}
|
|
if (revents & (POLLERR | POLLHUP))
|
|
break;
|
|
if (!(revents & POLLIN)) {
|
|
if (pfds[0].revents & POLLIN)
|
|
break;
|
|
continue;
|
|
}
|
|
|
|
err = snd_rawmidi_read(input, buf, sizeof(buf));
|
|
if (err == -EAGAIN)
|
|
continue;
|
|
if (err < 0) {
|
|
error("cannot read from port \"%s\": %s", port_name, snd_strerror(err));
|
|
break;
|
|
}
|
|
length = 0;
|
|
for (i = 0; i < err; ++i)
|
|
if ((buf[i] != MIDI_CMD_COMMON_CLOCK &&
|
|
buf[i] != MIDI_CMD_COMMON_SENSING) ||
|
|
(buf[i] == MIDI_CMD_COMMON_CLOCK && !ignore_clock) ||
|
|
(buf[i] == MIDI_CMD_COMMON_SENSING && !ignore_active_sensing))
|
|
buf[length++] = buf[i];
|
|
if (length == 0)
|
|
continue;
|
|
read += length;
|
|
|
|
if (receive_file != -1)
|
|
write(receive_file, buf, length);
|
|
if (dump) {
|
|
for (i = 0; i < length; ++i)
|
|
print_byte(buf[i], &ts);
|
|
|
|
fflush(stdout);
|
|
}
|
|
|
|
if (timeout > 0) {
|
|
err = timerfd_settime(pfds[0].fd, 0, &itimerspec, NULL);
|
|
if (err < 0) {
|
|
error("cannot set timer: %s", strerror(errno));
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
if (isatty(fileno(stdout)))
|
|
printf("\n%d bytes read\n", read);
|
|
}
|
|
|
|
ok = 1;
|
|
_exit:
|
|
if (inputp)
|
|
snd_rawmidi_close(input);
|
|
if (outputp)
|
|
snd_rawmidi_close(output);
|
|
_exit2:
|
|
if (receive_file != -1)
|
|
close(receive_file);
|
|
return !ok;
|
|
}
|