[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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[1848] | 37 | if ( midi_clock_init() == -1 ) { |
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| 38 | ROAR_WARN("Can not initialize MIDI subsystem component clock"); |
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| 39 | } |
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| 40 | |
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[1843] | 41 | return 0; |
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| 42 | } |
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[1848] | 43 | |
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[1843] | 44 | int midi_free (void) { |
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| 45 | return midi_cb_free(); |
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| 46 | } |
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| 47 | |
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| 48 | int midi_update(void) { |
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[1848] | 49 | |
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| 50 | if ( g_midi_clock_stream != -1 ) |
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| 51 | midi_check_bridge(g_midi_clock_stream); |
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| 52 | |
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[1843] | 53 | return midi_cb_update(); |
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| 54 | } |
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| 55 | |
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[1845] | 56 | // STREAMS: |
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| 57 | |
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| 58 | int midi_check_stream (int id) { |
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[1846] | 59 | struct roar_stream * s; |
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| 60 | struct roar_stream_server * ss; |
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| 61 | |
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| 62 | if ( g_streams[id] == NULL ) |
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| 63 | return -1; |
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| 64 | |
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| 65 | ROAR_DBG("midi_check_stream(id=%i) = ?", id); |
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| 66 | |
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| 67 | s = ROAR_STREAM(ss = g_streams[id]); |
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| 68 | |
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[1848] | 69 | if ( s->dir == ROAR_DIR_BRIDGE ) |
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| 70 | return midi_check_bridge(id); |
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| 71 | |
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[1846] | 72 | switch (s->info.codec) { |
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| 73 | default: |
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| 74 | streams_delete(id); |
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| 75 | return -1; |
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| 76 | } |
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| 77 | |
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| 78 | return 0; |
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[1845] | 79 | } |
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[1846] | 80 | |
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[1845] | 81 | int midi_send_stream (int id) { |
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[1846] | 82 | struct roar_stream * s; |
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| 83 | struct roar_stream_server * ss; |
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| 84 | |
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| 85 | if ( g_streams[id] == NULL ) |
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| 86 | return -1; |
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| 87 | |
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| 88 | ROAR_DBG("midi_send_stream(id=%i) = ?", id); |
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| 89 | |
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| 90 | s = ROAR_STREAM(ss = g_streams[id]); |
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| 91 | |
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| 92 | switch (s->info.codec) { |
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| 93 | default: |
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| 94 | streams_delete(id); |
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| 95 | return -1; |
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| 96 | } |
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| 97 | |
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| 98 | return 0; |
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[1845] | 99 | } |
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| 100 | |
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[1848] | 101 | // bridges: |
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| 102 | int midi_check_bridge (int id) { |
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| 103 | return -1; |
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| 104 | } |
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| 105 | |
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| 106 | // clock: |
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| 107 | |
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| 108 | int midi_clock_init (void) { |
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| 109 | struct roar_stream * s; |
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| 110 | struct roar_stream_server * ss; |
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| 111 | |
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| 112 | if ( (g_midi_clock_stream = streams_new()) == -1 ) { |
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| 113 | ROAR_WARN("Error while initializing MIDI subsystem component clock"); |
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| 114 | return -1; |
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| 115 | } |
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| 116 | |
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| 117 | midi_vio_set_dummy(g_midi_clock_stream); |
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| 118 | |
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| 119 | streams_get(g_midi_clock_stream, &ss); |
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| 120 | s = ROAR_STREAM(ss); |
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| 121 | |
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| 122 | memcpy(&(s->info), g_sa, sizeof(struct roar_audio_info)); |
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| 123 | |
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| 124 | s->pos_rel_id = g_midi_clock_stream; |
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| 125 | |
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| 126 | s->info.codec = ROAR_CODEC_MIDI; |
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| 127 | ss->codec_orgi = ROAR_CODEC_MIDI; |
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| 128 | |
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| 129 | s->info.channels = 0; |
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| 130 | s->info.rate = MIDI_RATE; |
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| 131 | s->info.bits = 8; |
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| 132 | |
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| 133 | if ( streams_set_dir(g_midi_clock_stream, ROAR_DIR_BRIDGE, 1) == -1 ) { |
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| 134 | ROAR_WARN("Error while initializing MIDI subsystem component clock"); |
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| 135 | return -1; |
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| 136 | } |
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| 137 | |
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| 138 | streams_set_name(g_midi_clock_stream, "MIDI Clock"); |
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| 139 | |
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| 140 | streams_set_flag(g_midi_clock_stream, ROAR_FLAG_PRIMARY); |
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| 141 | streams_set_flag(g_midi_clock_stream, ROAR_FLAG_SYNC); |
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| 142 | |
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| 143 | return 0; |
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| 144 | } |
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| 145 | |
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[1845] | 146 | // CB: |
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[1843] | 147 | |
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| 148 | int midi_cb_init (void) { |
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[1751] | 149 | #ifdef _HAVE_CONSOLE |
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[1843] | 150 | struct roar_stream * s; |
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| 151 | struct roar_stream_server * ss; |
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[185] | 152 | int i; |
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| 153 | char * files[] = { |
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| 154 | "/dev/console", |
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| 155 | #ifdef __linux__ |
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| 156 | "/dev/tty0", |
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| 157 | "/dev/vc/0", |
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| 158 | #endif |
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| 159 | NULL |
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| 160 | }; |
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| 161 | |
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[192] | 162 | g_console = -1; |
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[1843] | 163 | g_midi_cb_stream = -1; |
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| 164 | g_midi_cb_stoptime = 0; |
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| 165 | g_midi_cb_playing = 0; |
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[185] | 166 | |
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| 167 | for (i = 0; files[i] != NULL; i++) { |
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| 168 | if ( (g_console = open(files[i], O_WRONLY|O_NOCTTY, 0)) != -1 ) |
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| 169 | break; |
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| 170 | } |
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| 171 | |
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[1843] | 172 | if ( g_console == -1 ) |
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| 173 | return -1; |
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| 174 | |
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| 175 | if ( (g_midi_cb_stream = streams_new()) == -1 ) { |
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| 176 | ROAR_WARN("Error while initializing MIDI subsystem component CB"); |
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| 177 | midi_cb_free(); |
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[187] | 178 | return -1; |
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| 179 | } |
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[1843] | 180 | |
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[1848] | 181 | midi_vio_set_dummy(g_midi_cb_stream); |
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| 182 | |
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[1843] | 183 | streams_get(g_midi_cb_stream, &ss); |
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| 184 | s = ROAR_STREAM(ss); |
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| 185 | |
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| 186 | memcpy(&(s->info), g_sa, sizeof(struct roar_audio_info)); |
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| 187 | |
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| 188 | s->pos_rel_id = -1; |
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| 189 | |
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| 190 | s->info.codec = 0; |
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| 191 | ss->codec_orgi = 0; |
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| 192 | |
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| 193 | s->info.channels = 1; |
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| 194 | s->info.rate = 1193180; |
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| 195 | s->info.bits = 8; |
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| 196 | |
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| 197 | if ( streams_set_dir(g_midi_cb_stream, ROAR_DIR_BRIDGE, 1) == -1 ) { |
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| 198 | ROAR_WARN("Error while initializing MIDI subsystem component CB"); |
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| 199 | midi_cb_free(); |
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| 200 | return -1; |
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| 201 | } |
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| 202 | |
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| 203 | streams_set_name(g_midi_cb_stream, "Console speaker bridge"); |
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| 204 | |
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| 205 | streams_set_flag(g_midi_cb_stream, ROAR_FLAG_OUTPUT); |
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| 206 | streams_set_flag(g_midi_cb_stream, ROAR_FLAG_PRIMARY); |
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[1847] | 207 | streams_set_flag(g_midi_cb_stream, ROAR_FLAG_HWMIXER); |
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[1843] | 208 | |
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| 209 | return 0; |
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[1485] | 210 | #else |
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[1843] | 211 | g_console = -1; |
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| 212 | g_midi_cb_stream = -1; |
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| 213 | |
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[1485] | 214 | return -1; |
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| 215 | #endif |
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[185] | 216 | } |
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| 217 | |
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[1843] | 218 | int midi_cb_free (void) { |
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[1751] | 219 | #ifdef _HAVE_CONSOLE |
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[1843] | 220 | |
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| 221 | midi_cb_stop(); |
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| 222 | |
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| 223 | if ( g_midi_cb_stream != -1 ) |
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| 224 | streams_delete(g_midi_cb_stream); |
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| 225 | |
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[185] | 226 | if ( g_console != -1 ) |
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| 227 | close(g_console); |
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[1843] | 228 | |
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[185] | 229 | return 0; |
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[1485] | 230 | #else |
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| 231 | return -1; |
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| 232 | #endif |
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[185] | 233 | } |
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| 234 | |
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| 235 | int midi_cb_play(float t, float freq, int override) { |
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[191] | 236 | float samples_per_sec /* S/s */ = g_sa->rate * g_sa->channels; |
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| 237 | |
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[189] | 238 | /* |
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| 239 | #define MIDI_CB_NOOVERRIDE 0 |
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| 240 | #define MIDI_CB_OVERRIDE 1 |
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| 241 | */ |
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[192] | 242 | if ( g_midi_cb_playing && override != MIDI_CB_OVERRIDE ) |
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[191] | 243 | return -1; |
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| 244 | |
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| 245 | g_midi_cb_stoptime = ROAR_MATH_OVERFLOW_ADD(g_pos, samples_per_sec*t); |
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| 246 | midi_cb_start(freq); |
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[192] | 247 | g_midi_cb_playing = 1; |
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[191] | 248 | |
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| 249 | return 0; |
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[185] | 250 | } |
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| 251 | |
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[190] | 252 | int midi_cb_update (void) { |
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[192] | 253 | if ( !g_midi_cb_playing ) |
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| 254 | return 0; |
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| 255 | |
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[190] | 256 | if ( g_midi_cb_stoptime <= g_pos ) |
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[189] | 257 | midi_cb_stop(); |
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| 258 | |
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| 259 | return 0; |
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| 260 | } |
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| 261 | |
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[185] | 262 | int midi_cb_start(float freq) { |
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| 263 | // On linux this uses ioctl KIOCSOUND |
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[188] | 264 | #ifdef __linux__ |
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| 265 | if ( g_console == -1 ) |
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| 266 | return -1; |
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| 267 | |
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[192] | 268 | if ( ioctl(g_console, KIOCSOUND, freq == 0 ? 0 : (int)(1193180.0/freq)) == -1 ) |
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[188] | 269 | return -1; |
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| 270 | |
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| 271 | return 0; |
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| 272 | #else |
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[185] | 273 | return -1; |
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[188] | 274 | #endif |
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[185] | 275 | } |
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| 276 | |
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| 277 | int midi_cb_stop (void) { |
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| 278 | #ifdef __linux__ |
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[192] | 279 | g_midi_cb_playing = 0; |
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[185] | 280 | return midi_cb_start(0); |
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| 281 | #else |
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| 282 | return -1; |
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| 283 | #endif |
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| 284 | } |
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| 285 | |
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[1848] | 286 | // VIO: |
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| 287 | |
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| 288 | int midi_vio_set_dummy(int stream) { |
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| 289 | struct roar_stream_server * ss; |
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| 290 | |
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| 291 | if ( streams_get(stream, &ss) == -1 ) |
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| 292 | return -1; |
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| 293 | |
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| 294 | ss->vio.read = NULL; |
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| 295 | ss->vio.write = NULL; |
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| 296 | ss->vio.lseek = NULL; |
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[1849] | 297 | ss->vio.nonblock = (int (*)(struct roar_vio_calls * vio, int state))midi_vio_ok; |
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| 298 | ss->vio.sync = (int (*)(struct roar_vio_calls * vio))midi_vio_ok; |
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[1848] | 299 | ss->vio.ctl = NULL; |
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[1849] | 300 | ss->vio.close = (int (*)(struct roar_vio_calls * vio))midi_vio_ok; |
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| 301 | |
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| 302 | return 0; |
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[1848] | 303 | } |
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| 304 | |
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| 305 | int midi_vio_ok(struct roar_vio_calls * vio, ...) { |
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| 306 | return 0; |
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| 307 | } |
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| 308 | |
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[169] | 309 | //ll |
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