[169] | 1 | //midi.c: |
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| 2 | |
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[668] | 3 | /* |
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| 4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2008 |
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| 5 | * |
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| 6 | * This file is part of roard a part of RoarAudio, |
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| 7 | * a cross-platform sound system for both, home and professional use. |
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| 8 | * See README for details. |
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| 9 | * |
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| 10 | * This file is free software; you can redistribute it and/or modify |
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| 11 | * it under the terms of the GNU General Public License version 3 |
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| 12 | * as published by the Free Software Foundation. |
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| 13 | * |
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| 14 | * RoarAudio is distributed in the hope that it will be useful, |
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| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 17 | * GNU General Public License for more details. |
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| 18 | * |
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| 19 | * You should have received a copy of the GNU General Public License |
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| 20 | * along with this software; see the file COPYING. If not, write to |
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| 21 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. |
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| 22 | * |
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| 23 | */ |
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| 24 | |
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[169] | 25 | #include "roard.h" |
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| 26 | |
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[1751] | 27 | #if defined(ROAR_HAVE_IO_POSIX) && !defined(ROAR_TARGET_WIN32) |
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| 28 | #define _HAVE_CONSOLE |
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| 29 | #endif |
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| 30 | |
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[185] | 31 | int midi_init (void) { |
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[1843] | 32 | |
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| 33 | if ( midi_cb_init() == -1 ) { |
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| 34 | ROAR_WARN("Can not initialize MIDI subsystem component CB"); |
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| 35 | } |
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| 36 | |
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| 37 | return 0; |
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| 38 | } |
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| 39 | int midi_free (void) { |
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| 40 | return midi_cb_free(); |
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| 41 | } |
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| 42 | |
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| 43 | int midi_update(void) { |
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| 44 | return midi_cb_update(); |
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| 45 | } |
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| 46 | |
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[1845] | 47 | // STREAMS: |
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| 48 | |
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| 49 | int midi_check_stream (int id) { |
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| 50 | return -1; |
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| 51 | } |
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| 52 | int midi_send_stream (int id) { |
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| 53 | return -1; |
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| 54 | } |
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| 55 | |
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| 56 | // CB: |
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[1843] | 57 | |
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| 58 | int midi_cb_init (void) { |
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[1751] | 59 | #ifdef _HAVE_CONSOLE |
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[1843] | 60 | struct roar_stream * s; |
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| 61 | struct roar_stream_server * ss; |
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[185] | 62 | int i; |
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| 63 | char * files[] = { |
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| 64 | "/dev/console", |
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| 65 | #ifdef __linux__ |
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| 66 | "/dev/tty0", |
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| 67 | "/dev/vc/0", |
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| 68 | #endif |
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| 69 | NULL |
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| 70 | }; |
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| 71 | |
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[192] | 72 | g_console = -1; |
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[1843] | 73 | g_midi_cb_stream = -1; |
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| 74 | g_midi_cb_stoptime = 0; |
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| 75 | g_midi_cb_playing = 0; |
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[185] | 76 | |
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| 77 | for (i = 0; files[i] != NULL; i++) { |
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| 78 | if ( (g_console = open(files[i], O_WRONLY|O_NOCTTY, 0)) != -1 ) |
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| 79 | break; |
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| 80 | } |
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| 81 | |
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[1843] | 82 | if ( g_console == -1 ) |
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| 83 | return -1; |
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| 84 | |
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| 85 | if ( (g_midi_cb_stream = streams_new()) == -1 ) { |
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| 86 | ROAR_WARN("Error while initializing MIDI subsystem component CB"); |
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| 87 | midi_cb_free(); |
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[187] | 88 | return -1; |
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| 89 | } |
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[1843] | 90 | |
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| 91 | streams_get(g_midi_cb_stream, &ss); |
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| 92 | s = ROAR_STREAM(ss); |
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| 93 | |
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| 94 | memcpy(&(s->info), g_sa, sizeof(struct roar_audio_info)); |
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| 95 | |
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| 96 | s->pos_rel_id = -1; |
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| 97 | |
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| 98 | s->info.codec = 0; |
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| 99 | ss->codec_orgi = 0; |
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| 100 | |
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| 101 | s->info.channels = 1; |
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| 102 | s->info.rate = 1193180; |
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| 103 | s->info.bits = 8; |
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| 104 | |
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| 105 | if ( streams_set_dir(g_midi_cb_stream, ROAR_DIR_BRIDGE, 1) == -1 ) { |
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| 106 | ROAR_WARN("Error while initializing MIDI subsystem component CB"); |
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| 107 | midi_cb_free(); |
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| 108 | return -1; |
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| 109 | } |
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| 110 | |
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| 111 | streams_set_name(g_midi_cb_stream, "Console speaker bridge"); |
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| 112 | |
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| 113 | streams_set_flag(g_midi_cb_stream, ROAR_FLAG_OUTPUT); |
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| 114 | streams_set_flag(g_midi_cb_stream, ROAR_FLAG_PRIMARY); |
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| 115 | |
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| 116 | return 0; |
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[1485] | 117 | #else |
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[1843] | 118 | g_console = -1; |
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| 119 | g_midi_cb_stream = -1; |
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| 120 | |
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[1485] | 121 | return -1; |
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| 122 | #endif |
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[185] | 123 | } |
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| 124 | |
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[1843] | 125 | int midi_cb_free (void) { |
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[1751] | 126 | #ifdef _HAVE_CONSOLE |
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[1843] | 127 | |
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| 128 | midi_cb_stop(); |
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| 129 | |
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| 130 | if ( g_midi_cb_stream != -1 ) |
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| 131 | streams_delete(g_midi_cb_stream); |
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| 132 | |
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[185] | 133 | if ( g_console != -1 ) |
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| 134 | close(g_console); |
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[1843] | 135 | |
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[185] | 136 | return 0; |
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[1485] | 137 | #else |
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| 138 | return -1; |
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| 139 | #endif |
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[185] | 140 | } |
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| 141 | |
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| 142 | int midi_cb_play(float t, float freq, int override) { |
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[191] | 143 | float samples_per_sec /* S/s */ = g_sa->rate * g_sa->channels; |
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| 144 | |
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[189] | 145 | /* |
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| 146 | #define MIDI_CB_NOOVERRIDE 0 |
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| 147 | #define MIDI_CB_OVERRIDE 1 |
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| 148 | */ |
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[192] | 149 | if ( g_midi_cb_playing && override != MIDI_CB_OVERRIDE ) |
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[191] | 150 | return -1; |
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| 151 | |
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| 152 | g_midi_cb_stoptime = ROAR_MATH_OVERFLOW_ADD(g_pos, samples_per_sec*t); |
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| 153 | midi_cb_start(freq); |
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[192] | 154 | g_midi_cb_playing = 1; |
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[191] | 155 | |
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| 156 | return 0; |
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[185] | 157 | } |
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| 158 | |
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[190] | 159 | int midi_cb_update (void) { |
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[192] | 160 | if ( !g_midi_cb_playing ) |
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| 161 | return 0; |
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| 162 | |
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[190] | 163 | if ( g_midi_cb_stoptime <= g_pos ) |
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[189] | 164 | midi_cb_stop(); |
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| 165 | |
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| 166 | return 0; |
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| 167 | } |
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| 168 | |
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[185] | 169 | int midi_cb_start(float freq) { |
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| 170 | // On linux this uses ioctl KIOCSOUND |
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[188] | 171 | #ifdef __linux__ |
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| 172 | if ( g_console == -1 ) |
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| 173 | return -1; |
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| 174 | |
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[192] | 175 | if ( ioctl(g_console, KIOCSOUND, freq == 0 ? 0 : (int)(1193180.0/freq)) == -1 ) |
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[188] | 176 | return -1; |
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| 177 | |
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| 178 | return 0; |
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| 179 | #else |
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[185] | 180 | return -1; |
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[188] | 181 | #endif |
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[185] | 182 | } |
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| 183 | |
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| 184 | int midi_cb_stop (void) { |
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| 185 | #ifdef __linux__ |
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[192] | 186 | g_midi_cb_playing = 0; |
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[185] | 187 | return midi_cb_start(0); |
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| 188 | #else |
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| 189 | return -1; |
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| 190 | #endif |
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| 191 | } |
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| 192 | |
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[169] | 193 | //ll |
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