2 * Midi Sequencer interface routines.
4 * Copyright (C) 1999 Steve Ratcliffe
5 * Copyright (c) 1999-2000 Takashi Iwai <tiwai@suse.de>
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.
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.
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
22 #include "emux_voice.h"
23 #include <linux/slab.h>
26 /* Prototypes for static functions */
27 static void free_port(void *private);
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);
31 static int get_client(struct snd_card *card, int index, char *name);
34 * MIDI emulation operators
36 static struct snd_midi_op emux_ops = {
40 snd_emux_terminate_note,
48 * number of MIDI channels
50 #define MIDI_CHANNELS 16
53 * type flags for MIDI sequencer port
55 #define DEFAULT_MIDI_TYPE (SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC |\
56 SNDRV_SEQ_PORT_TYPE_MIDI_GM |\
57 SNDRV_SEQ_PORT_TYPE_MIDI_GS |\
58 SNDRV_SEQ_PORT_TYPE_MIDI_XG |\
59 SNDRV_SEQ_PORT_TYPE_DIRECT_SAMPLE)
62 * Initialise the EMUX Synth by creating a client and registering
64 * Each of the ports will contain the 16 midi channels. Applications
65 * can connect to these ports to play midi data.
68 snd_emux_init_seq(struct snd_emux *emu, struct snd_card *card, int index)
71 struct snd_seq_port_callback pinfo;
74 sprintf(tmpname, "%s WaveTable", emu->name);
75 emu->client = get_client(card, index, tmpname);
76 if (emu->client < 0) {
77 snd_printk("can't create client\n");
81 if (emu->num_ports < 0) {
82 snd_printk("seqports must be greater than zero\n");
84 } else if (emu->num_ports >= SNDRV_EMUX_MAX_PORTS) {
85 snd_printk("too many ports."
86 "limited max. ports %d\n", SNDRV_EMUX_MAX_PORTS);
87 emu->num_ports = SNDRV_EMUX_MAX_PORTS;
90 memset(&pinfo, 0, sizeof(pinfo));
91 pinfo.owner = THIS_MODULE;
92 pinfo.use = snd_emux_use;
93 pinfo.unuse = snd_emux_unuse;
94 pinfo.event_input = snd_emux_event_input;
96 for (i = 0; i < emu->num_ports; i++) {
97 struct snd_emux_port *p;
99 sprintf(tmpname, "%s Port %d", emu->name, i);
100 p = snd_emux_create_port(emu, tmpname, MIDI_CHANNELS,
103 snd_printk("can't create port\n");
107 p->port_mode = SNDRV_EMUX_PORT_MODE_MIDI;
108 snd_emux_init_port(p);
109 emu->ports[i] = p->chset.port;
110 emu->portptrs[i] = p;
118 * Detach from the ports that were set up for this synthesizer and
119 * destroy the kernel client.
122 snd_emux_detach_seq(struct snd_emux *emu)
125 snd_emux_terminate_all(emu);
127 down(&emu->register_mutex);
128 if (emu->client >= 0) {
129 snd_seq_delete_kernel_client(emu->client);
132 up(&emu->register_mutex);
137 * create a sequencer port and channel_set
140 struct snd_emux_port *
141 snd_emux_create_port(struct snd_emux *emu, char *name,
142 int max_channels, int oss_port,
143 struct snd_seq_port_callback *callback)
145 struct snd_emux_port *p;
148 /* Allocate structures for this channel */
149 if ((p = kzalloc(sizeof(*p), GFP_KERNEL)) == NULL) {
150 snd_printk("no memory\n");
153 p->chset.channels = kcalloc(max_channels, sizeof(struct snd_midi_channel), GFP_KERNEL);
154 if (p->chset.channels == NULL) {
155 snd_printk("no memory\n");
159 for (i = 0; i < max_channels; i++)
160 p->chset.channels[i].number = i;
161 p->chset.private_data = p;
162 p->chset.max_channels = max_channels;
164 p->chset.client = emu->client;
165 #ifdef SNDRV_EMUX_USE_RAW_EFFECT
166 snd_emux_create_effect(p);
168 callback->private_free = free_port;
169 callback->private_data = p;
171 cap = SNDRV_SEQ_PORT_CAP_WRITE;
173 type = SNDRV_SEQ_PORT_TYPE_SPECIFIC;
175 type = DEFAULT_MIDI_TYPE;
176 cap |= SNDRV_SEQ_PORT_CAP_SUBS_WRITE;
179 p->chset.port = snd_seq_event_port_attach(emu->client, callback,
180 cap, type, max_channels,
181 emu->max_voices, name);
188 * release memory block for port
191 free_port(void *private_data)
193 struct snd_emux_port *p;
197 #ifdef SNDRV_EMUX_USE_RAW_EFFECT
198 snd_emux_delete_effect(p);
200 kfree(p->chset.channels);
206 #define DEFAULT_DRUM_FLAGS (1<<9)
209 * initialize the port specific parameters
212 snd_emux_init_port(struct snd_emux_port *p)
214 p->drum_flags = DEFAULT_DRUM_FLAGS;
217 snd_emux_reset_port(p);
225 snd_emux_reset_port(struct snd_emux_port *port)
229 /* stop all sounds */
230 snd_emux_sounds_off_all(port);
232 snd_midi_channel_set_clear(&port->chset);
234 #ifdef SNDRV_EMUX_USE_RAW_EFFECT
235 snd_emux_clear_effect(port);
238 /* set port specific control parameters */
239 port->ctrls[EMUX_MD_DEF_BANK] = 0;
240 port->ctrls[EMUX_MD_DEF_DRUM] = 0;
241 port->ctrls[EMUX_MD_REALTIME_PAN] = 1;
243 for (i = 0; i < port->chset.max_channels; i++) {
244 struct snd_midi_channel *chan = port->chset.channels + i;
245 chan->drum_channel = ((port->drum_flags >> i) & 1) ? 1 : 0;
251 * input sequencer event
254 snd_emux_event_input(struct snd_seq_event *ev, int direct, void *private_data,
257 struct snd_emux_port *port;
260 snd_assert(port != NULL && ev != NULL, return -EINVAL);
262 snd_midi_process_event(&emux_ops, ev, &port->chset);
269 * increment usage count
272 snd_emux_inc_count(struct snd_emux *emu)
275 if (!try_module_get(emu->ops.owner))
277 if (!try_module_get(emu->card->module)) {
278 module_put(emu->ops.owner);
288 * decrease usage count
291 snd_emux_dec_count(struct snd_emux *emu)
293 module_put(emu->card->module);
296 snd_emux_terminate_all(emu);
297 module_put(emu->ops.owner);
302 * Routine that is called upon a first use of a particular port
305 snd_emux_use(void *private_data, struct snd_seq_port_subscribe *info)
307 struct snd_emux_port *p;
308 struct snd_emux *emu;
311 snd_assert(p != NULL, return -EINVAL);
313 snd_assert(emu != NULL, return -EINVAL);
315 down(&emu->register_mutex);
316 snd_emux_init_port(p);
317 snd_emux_inc_count(emu);
318 up(&emu->register_mutex);
323 * Routine that is called upon the last unuse() of a particular port.
326 snd_emux_unuse(void *private_data, struct snd_seq_port_subscribe *info)
328 struct snd_emux_port *p;
329 struct snd_emux *emu;
332 snd_assert(p != NULL, return -EINVAL);
334 snd_assert(emu != NULL, return -EINVAL);
336 down(&emu->register_mutex);
337 snd_emux_sounds_off_all(p);
338 snd_emux_dec_count(emu);
339 up(&emu->register_mutex);
345 * Create a sequencer client
348 get_client(struct snd_card *card, int index, char *name)
350 struct snd_seq_client_info cinfo;
353 /* Find a free client, start from 1 as the MPU expects to use 0 */
354 client = snd_seq_create_kernel_client(card, index);
358 memset(&cinfo, 0, sizeof(cinfo));
359 cinfo.client = client;
360 cinfo.type = KERNEL_CLIENT;
361 strcpy(cinfo.name, name);
362 snd_seq_kernel_client_ctl(client, SNDRV_SEQ_IOCTL_SET_CLIENT_INFO, &cinfo);
369 * attach virtual rawmidi devices
371 int snd_emux_init_virmidi(struct snd_emux *emu, struct snd_card *card)
376 if (emu->midi_ports <= 0)
379 emu->vmidi = kcalloc(emu->midi_ports, sizeof(struct snd_rawmidi *), GFP_KERNEL);
380 if (emu->vmidi == NULL)
383 for (i = 0; i < emu->midi_ports; i++) {
384 struct snd_rawmidi *rmidi;
385 struct snd_virmidi_dev *rdev;
386 if (snd_virmidi_new(card, emu->midi_devidx + i, &rmidi) < 0)
388 rdev = rmidi->private_data;
389 sprintf(rmidi->name, "%s Synth MIDI", emu->name);
390 rdev->seq_mode = SNDRV_VIRMIDI_SEQ_ATTACH;
391 rdev->client = emu->client;
392 rdev->port = emu->ports[i];
393 if (snd_device_register(card, rmidi) < 0) {
394 snd_device_free(card, rmidi);
397 emu->vmidi[i] = rmidi;
398 //snd_printk("virmidi %d ok\n", i);
403 //snd_printk("error init..\n");
404 snd_emux_delete_virmidi(emu);
408 int snd_emux_delete_virmidi(struct snd_emux *emu)
412 if (emu->vmidi == NULL)
415 for (i = 0; i < emu->midi_ports; i++) {
417 snd_device_free(emu->card, emu->vmidi[i]);