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);
33 * MIDI emulation operators
35 static struct snd_midi_op emux_ops = {
39 snd_emux_terminate_note,
47 * number of MIDI channels
49 #define MIDI_CHANNELS 16
52 * type flags for MIDI sequencer port
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)
61 * Initialise the EMUX Synth by creating a client and registering
63 * Each of the ports will contain the 16 midi channels. Applications
64 * can connect to these ports to play midi data.
67 snd_emux_init_seq(struct snd_emux *emu, struct snd_card *card, int index)
70 struct snd_seq_port_callback pinfo;
73 emu->client = snd_seq_create_kernel_client(card, index,
74 "%s WaveTable", emu->name);
75 if (emu->client < 0) {
76 snd_printk("can't create client\n");
80 if (emu->num_ports < 0) {
81 snd_printk("seqports must be greater than zero\n");
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;
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;
95 for (i = 0; i < emu->num_ports; i++) {
96 struct snd_emux_port *p;
98 sprintf(tmpname, "%s Port %d", emu->name, i);
99 p = snd_emux_create_port(emu, tmpname, MIDI_CHANNELS,
102 snd_printk("can't create port\n");
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;
117 * Detach from the ports that were set up for this synthesizer and
118 * destroy the kernel client.
121 snd_emux_detach_seq(struct snd_emux *emu)
124 snd_emux_terminate_all(emu);
126 down(&emu->register_mutex);
127 if (emu->client >= 0) {
128 snd_seq_delete_kernel_client(emu->client);
131 up(&emu->register_mutex);
136 * create a sequencer port and channel_set
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)
144 struct snd_emux_port *p;
147 /* Allocate structures for this channel */
148 if ((p = kzalloc(sizeof(*p), GFP_KERNEL)) == NULL) {
149 snd_printk("no memory\n");
152 p->chset.channels = kcalloc(max_channels, sizeof(struct snd_midi_channel), GFP_KERNEL);
153 if (p->chset.channels == NULL) {
154 snd_printk("no memory\n");
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;
163 p->chset.client = emu->client;
164 #ifdef SNDRV_EMUX_USE_RAW_EFFECT
165 snd_emux_create_effect(p);
167 callback->private_free = free_port;
168 callback->private_data = p;
170 cap = SNDRV_SEQ_PORT_CAP_WRITE;
172 type = SNDRV_SEQ_PORT_TYPE_SPECIFIC;
174 type = DEFAULT_MIDI_TYPE;
175 cap |= SNDRV_SEQ_PORT_CAP_SUBS_WRITE;
178 p->chset.port = snd_seq_event_port_attach(emu->client, callback,
179 cap, type, max_channels,
180 emu->max_voices, name);
187 * release memory block for port
190 free_port(void *private_data)
192 struct snd_emux_port *p;
196 #ifdef SNDRV_EMUX_USE_RAW_EFFECT
197 snd_emux_delete_effect(p);
199 kfree(p->chset.channels);
205 #define DEFAULT_DRUM_FLAGS (1<<9)
208 * initialize the port specific parameters
211 snd_emux_init_port(struct snd_emux_port *p)
213 p->drum_flags = DEFAULT_DRUM_FLAGS;
216 snd_emux_reset_port(p);
224 snd_emux_reset_port(struct snd_emux_port *port)
228 /* stop all sounds */
229 snd_emux_sounds_off_all(port);
231 snd_midi_channel_set_clear(&port->chset);
233 #ifdef SNDRV_EMUX_USE_RAW_EFFECT
234 snd_emux_clear_effect(port);
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;
242 for (i = 0; i < port->chset.max_channels; i++) {
243 struct snd_midi_channel *chan = port->chset.channels + i;
244 chan->drum_channel = ((port->drum_flags >> i) & 1) ? 1 : 0;
250 * input sequencer event
253 snd_emux_event_input(struct snd_seq_event *ev, int direct, void *private_data,
256 struct snd_emux_port *port;
259 snd_assert(port != NULL && ev != NULL, return -EINVAL);
261 snd_midi_process_event(&emux_ops, ev, &port->chset);
268 * increment usage count
271 snd_emux_inc_count(struct snd_emux *emu)
274 if (!try_module_get(emu->ops.owner))
276 if (!try_module_get(emu->card->module)) {
277 module_put(emu->ops.owner);
287 * decrease usage count
290 snd_emux_dec_count(struct snd_emux *emu)
292 module_put(emu->card->module);
295 snd_emux_terminate_all(emu);
296 module_put(emu->ops.owner);
301 * Routine that is called upon a first use of a particular port
304 snd_emux_use(void *private_data, struct snd_seq_port_subscribe *info)
306 struct snd_emux_port *p;
307 struct snd_emux *emu;
310 snd_assert(p != NULL, return -EINVAL);
312 snd_assert(emu != NULL, return -EINVAL);
314 down(&emu->register_mutex);
315 snd_emux_init_port(p);
316 snd_emux_inc_count(emu);
317 up(&emu->register_mutex);
322 * Routine that is called upon the last unuse() of a particular port.
325 snd_emux_unuse(void *private_data, struct snd_seq_port_subscribe *info)
327 struct snd_emux_port *p;
328 struct snd_emux *emu;
331 snd_assert(p != NULL, return -EINVAL);
333 snd_assert(emu != NULL, return -EINVAL);
335 down(&emu->register_mutex);
336 snd_emux_sounds_off_all(p);
337 snd_emux_dec_count(emu);
338 up(&emu->register_mutex);
344 * attach virtual rawmidi devices
346 int snd_emux_init_virmidi(struct snd_emux *emu, struct snd_card *card)
351 if (emu->midi_ports <= 0)
354 emu->vmidi = kcalloc(emu->midi_ports, sizeof(struct snd_rawmidi *), GFP_KERNEL);
355 if (emu->vmidi == NULL)
358 for (i = 0; i < emu->midi_ports; i++) {
359 struct snd_rawmidi *rmidi;
360 struct snd_virmidi_dev *rdev;
361 if (snd_virmidi_new(card, emu->midi_devidx + i, &rmidi) < 0)
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);
372 emu->vmidi[i] = rmidi;
373 //snd_printk("virmidi %d ok\n", i);
378 //snd_printk("error init..\n");
379 snd_emux_delete_virmidi(emu);
383 int snd_emux_delete_virmidi(struct snd_emux *emu)
387 if (emu->vmidi == NULL)
390 for (i = 0; i < emu->midi_ports; i++) {
392 snd_device_free(emu->card, emu->vmidi[i]);