Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Midi Sequencer interface routines. |
| 3 | * |
| 4 | * Copyright (C) 1999 Steve Ratcliffe |
| 5 | * Copyright (c) 1999-2000 Takashi Iwai <tiwai@suse.de> |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License as published by |
| 9 | * the Free Software Foundation; either version 2 of the License, or |
| 10 | * (at your option) any later version. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License |
| 18 | * along with this program; if not, write to the Free Software |
| 19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 20 | */ |
| 21 | |
| 22 | #include "emux_voice.h" |
| 23 | #include <linux/slab.h> |
| 24 | |
| 25 | |
| 26 | /* Prototypes for static functions */ |
| 27 | static void free_port(void *private); |
Takashi Iwai | 03da312 | 2005-11-17 14:24:47 +0100 | [diff] [blame] | 28 | static void snd_emux_init_port(struct snd_emux_port *p); |
| 29 | static int snd_emux_use(void *private_data, struct snd_seq_port_subscribe *info); |
| 30 | static int snd_emux_unuse(void *private_data, struct snd_seq_port_subscribe *info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | |
| 32 | /* |
| 33 | * MIDI emulation operators |
| 34 | */ |
Takashi Iwai | 03da312 | 2005-11-17 14:24:47 +0100 | [diff] [blame] | 35 | static struct snd_midi_op emux_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | snd_emux_note_on, |
| 37 | snd_emux_note_off, |
| 38 | snd_emux_key_press, |
| 39 | snd_emux_terminate_note, |
| 40 | snd_emux_control, |
| 41 | snd_emux_nrpn, |
| 42 | snd_emux_sysex, |
| 43 | }; |
| 44 | |
| 45 | |
| 46 | /* |
| 47 | * number of MIDI channels |
| 48 | */ |
| 49 | #define MIDI_CHANNELS 16 |
| 50 | |
| 51 | /* |
| 52 | * type flags for MIDI sequencer port |
| 53 | */ |
| 54 | #define DEFAULT_MIDI_TYPE (SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC |\ |
| 55 | SNDRV_SEQ_PORT_TYPE_MIDI_GM |\ |
| 56 | SNDRV_SEQ_PORT_TYPE_MIDI_GS |\ |
| 57 | SNDRV_SEQ_PORT_TYPE_MIDI_XG |\ |
| 58 | SNDRV_SEQ_PORT_TYPE_DIRECT_SAMPLE) |
| 59 | |
| 60 | /* |
| 61 | * Initialise the EMUX Synth by creating a client and registering |
| 62 | * a series of ports. |
| 63 | * Each of the ports will contain the 16 midi channels. Applications |
| 64 | * can connect to these ports to play midi data. |
| 65 | */ |
| 66 | int |
Takashi Iwai | 03da312 | 2005-11-17 14:24:47 +0100 | [diff] [blame] | 67 | snd_emux_init_seq(struct snd_emux *emu, struct snd_card *card, int index) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | { |
| 69 | int i; |
Takashi Iwai | 03da312 | 2005-11-17 14:24:47 +0100 | [diff] [blame] | 70 | struct snd_seq_port_callback pinfo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | char tmpname[64]; |
| 72 | |
Clemens Ladisch | 7b6d924 | 2005-12-12 09:33:37 +0100 | [diff] [blame] | 73 | emu->client = snd_seq_create_kernel_client(card, index, |
| 74 | "%s WaveTable", emu->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | if (emu->client < 0) { |
| 76 | snd_printk("can't create client\n"); |
| 77 | return -ENODEV; |
| 78 | } |
| 79 | |
| 80 | if (emu->num_ports < 0) { |
| 81 | snd_printk("seqports must be greater than zero\n"); |
| 82 | emu->num_ports = 1; |
| 83 | } else if (emu->num_ports >= SNDRV_EMUX_MAX_PORTS) { |
| 84 | snd_printk("too many ports." |
| 85 | "limited max. ports %d\n", SNDRV_EMUX_MAX_PORTS); |
| 86 | emu->num_ports = SNDRV_EMUX_MAX_PORTS; |
| 87 | } |
| 88 | |
| 89 | memset(&pinfo, 0, sizeof(pinfo)); |
| 90 | pinfo.owner = THIS_MODULE; |
| 91 | pinfo.use = snd_emux_use; |
| 92 | pinfo.unuse = snd_emux_unuse; |
| 93 | pinfo.event_input = snd_emux_event_input; |
| 94 | |
| 95 | for (i = 0; i < emu->num_ports; i++) { |
Takashi Iwai | 03da312 | 2005-11-17 14:24:47 +0100 | [diff] [blame] | 96 | struct snd_emux_port *p; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | |
| 98 | sprintf(tmpname, "%s Port %d", emu->name, i); |
| 99 | p = snd_emux_create_port(emu, tmpname, MIDI_CHANNELS, |
| 100 | 0, &pinfo); |
| 101 | if (p == NULL) { |
| 102 | snd_printk("can't create port\n"); |
| 103 | return -ENOMEM; |
| 104 | } |
| 105 | |
| 106 | p->port_mode = SNDRV_EMUX_PORT_MODE_MIDI; |
| 107 | snd_emux_init_port(p); |
| 108 | emu->ports[i] = p->chset.port; |
| 109 | emu->portptrs[i] = p; |
| 110 | } |
| 111 | |
| 112 | return 0; |
| 113 | } |
| 114 | |
| 115 | |
| 116 | /* |
| 117 | * Detach from the ports that were set up for this synthesizer and |
| 118 | * destroy the kernel client. |
| 119 | */ |
| 120 | void |
Takashi Iwai | 03da312 | 2005-11-17 14:24:47 +0100 | [diff] [blame] | 121 | snd_emux_detach_seq(struct snd_emux *emu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | { |
| 123 | if (emu->voices) |
| 124 | snd_emux_terminate_all(emu); |
| 125 | |
Ingo Molnar | ef9f0a4 | 2006-01-16 16:31:42 +0100 | [diff] [blame^] | 126 | mutex_lock(&emu->register_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | if (emu->client >= 0) { |
| 128 | snd_seq_delete_kernel_client(emu->client); |
| 129 | emu->client = -1; |
| 130 | } |
Ingo Molnar | ef9f0a4 | 2006-01-16 16:31:42 +0100 | [diff] [blame^] | 131 | mutex_unlock(&emu->register_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | } |
| 133 | |
| 134 | |
| 135 | /* |
| 136 | * create a sequencer port and channel_set |
| 137 | */ |
| 138 | |
Takashi Iwai | 03da312 | 2005-11-17 14:24:47 +0100 | [diff] [blame] | 139 | struct snd_emux_port * |
| 140 | snd_emux_create_port(struct snd_emux *emu, char *name, |
| 141 | int max_channels, int oss_port, |
| 142 | struct snd_seq_port_callback *callback) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | { |
Takashi Iwai | 03da312 | 2005-11-17 14:24:47 +0100 | [diff] [blame] | 144 | struct snd_emux_port *p; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | int i, type, cap; |
| 146 | |
| 147 | /* Allocate structures for this channel */ |
Takashi Iwai | 561b220 | 2005-09-09 14:22:34 +0200 | [diff] [blame] | 148 | if ((p = kzalloc(sizeof(*p), GFP_KERNEL)) == NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | snd_printk("no memory\n"); |
| 150 | return NULL; |
| 151 | } |
Takashi Iwai | 03da312 | 2005-11-17 14:24:47 +0100 | [diff] [blame] | 152 | p->chset.channels = kcalloc(max_channels, sizeof(struct snd_midi_channel), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 153 | if (p->chset.channels == NULL) { |
| 154 | snd_printk("no memory\n"); |
| 155 | kfree(p); |
| 156 | return NULL; |
| 157 | } |
| 158 | for (i = 0; i < max_channels; i++) |
| 159 | p->chset.channels[i].number = i; |
| 160 | p->chset.private_data = p; |
| 161 | p->chset.max_channels = max_channels; |
| 162 | p->emu = emu; |
| 163 | p->chset.client = emu->client; |
| 164 | #ifdef SNDRV_EMUX_USE_RAW_EFFECT |
| 165 | snd_emux_create_effect(p); |
| 166 | #endif |
| 167 | callback->private_free = free_port; |
| 168 | callback->private_data = p; |
| 169 | |
| 170 | cap = SNDRV_SEQ_PORT_CAP_WRITE; |
| 171 | if (oss_port) { |
| 172 | type = SNDRV_SEQ_PORT_TYPE_SPECIFIC; |
| 173 | } else { |
| 174 | type = DEFAULT_MIDI_TYPE; |
| 175 | cap |= SNDRV_SEQ_PORT_CAP_SUBS_WRITE; |
| 176 | } |
| 177 | |
| 178 | p->chset.port = snd_seq_event_port_attach(emu->client, callback, |
| 179 | cap, type, max_channels, |
| 180 | emu->max_voices, name); |
| 181 | |
| 182 | return p; |
| 183 | } |
| 184 | |
| 185 | |
| 186 | /* |
| 187 | * release memory block for port |
| 188 | */ |
| 189 | static void |
| 190 | free_port(void *private_data) |
| 191 | { |
Takashi Iwai | 03da312 | 2005-11-17 14:24:47 +0100 | [diff] [blame] | 192 | struct snd_emux_port *p; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 193 | |
| 194 | p = private_data; |
| 195 | if (p) { |
| 196 | #ifdef SNDRV_EMUX_USE_RAW_EFFECT |
| 197 | snd_emux_delete_effect(p); |
| 198 | #endif |
| 199 | kfree(p->chset.channels); |
| 200 | kfree(p); |
| 201 | } |
| 202 | } |
| 203 | |
| 204 | |
| 205 | #define DEFAULT_DRUM_FLAGS (1<<9) |
| 206 | |
| 207 | /* |
| 208 | * initialize the port specific parameters |
| 209 | */ |
| 210 | static void |
Takashi Iwai | 03da312 | 2005-11-17 14:24:47 +0100 | [diff] [blame] | 211 | snd_emux_init_port(struct snd_emux_port *p) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 212 | { |
| 213 | p->drum_flags = DEFAULT_DRUM_FLAGS; |
| 214 | p->volume_atten = 0; |
| 215 | |
| 216 | snd_emux_reset_port(p); |
| 217 | } |
| 218 | |
| 219 | |
| 220 | /* |
| 221 | * reset port |
| 222 | */ |
| 223 | void |
Takashi Iwai | 03da312 | 2005-11-17 14:24:47 +0100 | [diff] [blame] | 224 | snd_emux_reset_port(struct snd_emux_port *port) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | { |
| 226 | int i; |
| 227 | |
| 228 | /* stop all sounds */ |
| 229 | snd_emux_sounds_off_all(port); |
| 230 | |
| 231 | snd_midi_channel_set_clear(&port->chset); |
| 232 | |
| 233 | #ifdef SNDRV_EMUX_USE_RAW_EFFECT |
| 234 | snd_emux_clear_effect(port); |
| 235 | #endif |
| 236 | |
| 237 | /* set port specific control parameters */ |
| 238 | port->ctrls[EMUX_MD_DEF_BANK] = 0; |
| 239 | port->ctrls[EMUX_MD_DEF_DRUM] = 0; |
| 240 | port->ctrls[EMUX_MD_REALTIME_PAN] = 1; |
| 241 | |
| 242 | for (i = 0; i < port->chset.max_channels; i++) { |
Takashi Iwai | 03da312 | 2005-11-17 14:24:47 +0100 | [diff] [blame] | 243 | struct snd_midi_channel *chan = port->chset.channels + i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | chan->drum_channel = ((port->drum_flags >> i) & 1) ? 1 : 0; |
| 245 | } |
| 246 | } |
| 247 | |
| 248 | |
| 249 | /* |
| 250 | * input sequencer event |
| 251 | */ |
| 252 | int |
Takashi Iwai | 03da312 | 2005-11-17 14:24:47 +0100 | [diff] [blame] | 253 | snd_emux_event_input(struct snd_seq_event *ev, int direct, void *private_data, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | int atomic, int hop) |
| 255 | { |
Takashi Iwai | 03da312 | 2005-11-17 14:24:47 +0100 | [diff] [blame] | 256 | struct snd_emux_port *port; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 257 | |
| 258 | port = private_data; |
| 259 | snd_assert(port != NULL && ev != NULL, return -EINVAL); |
| 260 | |
| 261 | snd_midi_process_event(&emux_ops, ev, &port->chset); |
| 262 | |
| 263 | return 0; |
| 264 | } |
| 265 | |
| 266 | |
| 267 | /* |
| 268 | * increment usage count |
| 269 | */ |
| 270 | int |
Takashi Iwai | 03da312 | 2005-11-17 14:24:47 +0100 | [diff] [blame] | 271 | snd_emux_inc_count(struct snd_emux *emu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 272 | { |
| 273 | emu->used++; |
| 274 | if (!try_module_get(emu->ops.owner)) |
| 275 | goto __error; |
| 276 | if (!try_module_get(emu->card->module)) { |
| 277 | module_put(emu->ops.owner); |
| 278 | __error: |
| 279 | emu->used--; |
| 280 | return 0; |
| 281 | } |
| 282 | return 1; |
| 283 | } |
| 284 | |
| 285 | |
| 286 | /* |
| 287 | * decrease usage count |
| 288 | */ |
| 289 | void |
Takashi Iwai | 03da312 | 2005-11-17 14:24:47 +0100 | [diff] [blame] | 290 | snd_emux_dec_count(struct snd_emux *emu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 291 | { |
| 292 | module_put(emu->card->module); |
| 293 | emu->used--; |
| 294 | if (emu->used <= 0) |
| 295 | snd_emux_terminate_all(emu); |
| 296 | module_put(emu->ops.owner); |
| 297 | } |
| 298 | |
| 299 | |
| 300 | /* |
| 301 | * Routine that is called upon a first use of a particular port |
| 302 | */ |
| 303 | static int |
Takashi Iwai | 03da312 | 2005-11-17 14:24:47 +0100 | [diff] [blame] | 304 | snd_emux_use(void *private_data, struct snd_seq_port_subscribe *info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 305 | { |
Takashi Iwai | 03da312 | 2005-11-17 14:24:47 +0100 | [diff] [blame] | 306 | struct snd_emux_port *p; |
| 307 | struct snd_emux *emu; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 308 | |
| 309 | p = private_data; |
| 310 | snd_assert(p != NULL, return -EINVAL); |
| 311 | emu = p->emu; |
| 312 | snd_assert(emu != NULL, return -EINVAL); |
| 313 | |
Ingo Molnar | ef9f0a4 | 2006-01-16 16:31:42 +0100 | [diff] [blame^] | 314 | mutex_lock(&emu->register_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | snd_emux_init_port(p); |
| 316 | snd_emux_inc_count(emu); |
Ingo Molnar | ef9f0a4 | 2006-01-16 16:31:42 +0100 | [diff] [blame^] | 317 | mutex_unlock(&emu->register_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 318 | return 0; |
| 319 | } |
| 320 | |
| 321 | /* |
| 322 | * Routine that is called upon the last unuse() of a particular port. |
| 323 | */ |
| 324 | static int |
Takashi Iwai | 03da312 | 2005-11-17 14:24:47 +0100 | [diff] [blame] | 325 | snd_emux_unuse(void *private_data, struct snd_seq_port_subscribe *info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 326 | { |
Takashi Iwai | 03da312 | 2005-11-17 14:24:47 +0100 | [diff] [blame] | 327 | struct snd_emux_port *p; |
| 328 | struct snd_emux *emu; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 329 | |
| 330 | p = private_data; |
| 331 | snd_assert(p != NULL, return -EINVAL); |
| 332 | emu = p->emu; |
| 333 | snd_assert(emu != NULL, return -EINVAL); |
| 334 | |
Ingo Molnar | ef9f0a4 | 2006-01-16 16:31:42 +0100 | [diff] [blame^] | 335 | mutex_lock(&emu->register_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 336 | snd_emux_sounds_off_all(p); |
| 337 | snd_emux_dec_count(emu); |
Ingo Molnar | ef9f0a4 | 2006-01-16 16:31:42 +0100 | [diff] [blame^] | 338 | mutex_unlock(&emu->register_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 339 | return 0; |
| 340 | } |
| 341 | |
| 342 | |
| 343 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 344 | * attach virtual rawmidi devices |
| 345 | */ |
Takashi Iwai | 03da312 | 2005-11-17 14:24:47 +0100 | [diff] [blame] | 346 | int snd_emux_init_virmidi(struct snd_emux *emu, struct snd_card *card) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 347 | { |
| 348 | int i; |
| 349 | |
| 350 | emu->vmidi = NULL; |
| 351 | if (emu->midi_ports <= 0) |
| 352 | return 0; |
| 353 | |
Takashi Iwai | 03da312 | 2005-11-17 14:24:47 +0100 | [diff] [blame] | 354 | emu->vmidi = kcalloc(emu->midi_ports, sizeof(struct snd_rawmidi *), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 355 | if (emu->vmidi == NULL) |
| 356 | return -ENOMEM; |
| 357 | |
| 358 | for (i = 0; i < emu->midi_ports; i++) { |
Takashi Iwai | 03da312 | 2005-11-17 14:24:47 +0100 | [diff] [blame] | 359 | struct snd_rawmidi *rmidi; |
| 360 | struct snd_virmidi_dev *rdev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 361 | if (snd_virmidi_new(card, emu->midi_devidx + i, &rmidi) < 0) |
| 362 | goto __error; |
| 363 | rdev = rmidi->private_data; |
| 364 | sprintf(rmidi->name, "%s Synth MIDI", emu->name); |
| 365 | rdev->seq_mode = SNDRV_VIRMIDI_SEQ_ATTACH; |
| 366 | rdev->client = emu->client; |
| 367 | rdev->port = emu->ports[i]; |
| 368 | if (snd_device_register(card, rmidi) < 0) { |
| 369 | snd_device_free(card, rmidi); |
| 370 | goto __error; |
| 371 | } |
| 372 | emu->vmidi[i] = rmidi; |
| 373 | //snd_printk("virmidi %d ok\n", i); |
| 374 | } |
| 375 | return 0; |
| 376 | |
| 377 | __error: |
| 378 | //snd_printk("error init..\n"); |
| 379 | snd_emux_delete_virmidi(emu); |
| 380 | return -ENOMEM; |
| 381 | } |
| 382 | |
Takashi Iwai | 03da312 | 2005-11-17 14:24:47 +0100 | [diff] [blame] | 383 | int snd_emux_delete_virmidi(struct snd_emux *emu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 384 | { |
| 385 | int i; |
| 386 | |
| 387 | if (emu->vmidi == NULL) |
| 388 | return 0; |
| 389 | |
| 390 | for (i = 0; i < emu->midi_ports; i++) { |
| 391 | if (emu->vmidi[i]) |
| 392 | snd_device_free(emu->card, emu->vmidi[i]); |
| 393 | } |
| 394 | kfree(emu->vmidi); |
| 395 | emu->vmidi = NULL; |
| 396 | return 0; |
| 397 | } |