404 lines
8.3 KiB
C
404 lines
8.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* Midi Sequencer interface routines.
|
|
*
|
|
* Copyright (C) 1999 Steve Ratcliffe
|
|
* Copyright (c) 1999-2000 Takashi Iwai <tiwai@suse.de>
|
|
*/
|
|
|
|
#include "emux_voice.h"
|
|
#include <linux/slab.h>
|
|
#include <linux/module.h>
|
|
|
|
/* Prototypes for static functions */
|
|
static void free_port(void *private);
|
|
static void snd_emux_init_port(struct snd_emux_port *p);
|
|
static int snd_emux_use(void *private_data, struct snd_seq_port_subscribe *info);
|
|
static int snd_emux_unuse(void *private_data, struct snd_seq_port_subscribe *info);
|
|
|
|
/*
|
|
* MIDI emulation operators
|
|
*/
|
|
static const struct snd_midi_op emux_ops = {
|
|
.note_on = snd_emux_note_on,
|
|
.note_off = snd_emux_note_off,
|
|
.key_press = snd_emux_key_press,
|
|
.note_terminate = snd_emux_terminate_note,
|
|
.control = snd_emux_control,
|
|
.nrpn = snd_emux_nrpn,
|
|
.sysex = snd_emux_sysex,
|
|
};
|
|
|
|
|
|
/*
|
|
* number of MIDI channels
|
|
*/
|
|
#define MIDI_CHANNELS 16
|
|
|
|
/*
|
|
* type flags for MIDI sequencer port
|
|
*/
|
|
#define DEFAULT_MIDI_TYPE (SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC |\
|
|
SNDRV_SEQ_PORT_TYPE_MIDI_GM |\
|
|
SNDRV_SEQ_PORT_TYPE_MIDI_GS |\
|
|
SNDRV_SEQ_PORT_TYPE_MIDI_XG |\
|
|
SNDRV_SEQ_PORT_TYPE_HARDWARE |\
|
|
SNDRV_SEQ_PORT_TYPE_SYNTHESIZER)
|
|
|
|
/*
|
|
* Initialise the EMUX Synth by creating a client and registering
|
|
* a series of ports.
|
|
* Each of the ports will contain the 16 midi channels. Applications
|
|
* can connect to these ports to play midi data.
|
|
*/
|
|
int
|
|
snd_emux_init_seq(struct snd_emux *emu, struct snd_card *card, int index)
|
|
{
|
|
int i;
|
|
struct snd_seq_port_callback pinfo;
|
|
char tmpname[64];
|
|
|
|
emu->client = snd_seq_create_kernel_client(card, index,
|
|
"%s WaveTable", emu->name);
|
|
if (emu->client < 0) {
|
|
snd_printk(KERN_ERR "can't create client\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
if (emu->num_ports < 0) {
|
|
snd_printk(KERN_WARNING "seqports must be greater than zero\n");
|
|
emu->num_ports = 1;
|
|
} else if (emu->num_ports >= SNDRV_EMUX_MAX_PORTS) {
|
|
snd_printk(KERN_WARNING "too many ports."
|
|
"limited max. ports %d\n", SNDRV_EMUX_MAX_PORTS);
|
|
emu->num_ports = SNDRV_EMUX_MAX_PORTS;
|
|
}
|
|
|
|
memset(&pinfo, 0, sizeof(pinfo));
|
|
pinfo.owner = THIS_MODULE;
|
|
pinfo.use = snd_emux_use;
|
|
pinfo.unuse = snd_emux_unuse;
|
|
pinfo.event_input = snd_emux_event_input;
|
|
|
|
for (i = 0; i < emu->num_ports; i++) {
|
|
struct snd_emux_port *p;
|
|
|
|
sprintf(tmpname, "%s Port %d", emu->name, i);
|
|
p = snd_emux_create_port(emu, tmpname, MIDI_CHANNELS,
|
|
0, &pinfo);
|
|
if (!p) {
|
|
snd_printk(KERN_ERR "can't create port\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
p->port_mode = SNDRV_EMUX_PORT_MODE_MIDI;
|
|
snd_emux_init_port(p);
|
|
emu->ports[i] = p->chset.port;
|
|
emu->portptrs[i] = p;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*
|
|
* Detach from the ports that were set up for this synthesizer and
|
|
* destroy the kernel client.
|
|
*/
|
|
void
|
|
snd_emux_detach_seq(struct snd_emux *emu)
|
|
{
|
|
if (emu->voices)
|
|
snd_emux_terminate_all(emu);
|
|
|
|
if (emu->client >= 0) {
|
|
snd_seq_delete_kernel_client(emu->client);
|
|
emu->client = -1;
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* create a sequencer port and channel_set
|
|
*/
|
|
|
|
struct snd_emux_port *
|
|
snd_emux_create_port(struct snd_emux *emu, char *name,
|
|
int max_channels, int oss_port,
|
|
struct snd_seq_port_callback *callback)
|
|
{
|
|
struct snd_emux_port *p;
|
|
int i, type, cap;
|
|
|
|
/* Allocate structures for this channel */
|
|
p = kzalloc(sizeof(*p), GFP_KERNEL);
|
|
if (!p)
|
|
return NULL;
|
|
|
|
p->chset.channels = kcalloc(max_channels, sizeof(*p->chset.channels),
|
|
GFP_KERNEL);
|
|
if (!p->chset.channels) {
|
|
kfree(p);
|
|
return NULL;
|
|
}
|
|
for (i = 0; i < max_channels; i++)
|
|
p->chset.channels[i].number = i;
|
|
p->chset.private_data = p;
|
|
p->chset.max_channels = max_channels;
|
|
p->emu = emu;
|
|
p->chset.client = emu->client;
|
|
#ifdef SNDRV_EMUX_USE_RAW_EFFECT
|
|
snd_emux_create_effect(p);
|
|
#endif
|
|
callback->private_free = free_port;
|
|
callback->private_data = p;
|
|
|
|
cap = SNDRV_SEQ_PORT_CAP_WRITE;
|
|
if (oss_port) {
|
|
type = SNDRV_SEQ_PORT_TYPE_SPECIFIC;
|
|
} else {
|
|
type = DEFAULT_MIDI_TYPE;
|
|
cap |= SNDRV_SEQ_PORT_CAP_SUBS_WRITE;
|
|
}
|
|
|
|
p->chset.port = snd_seq_event_port_attach(emu->client, callback,
|
|
cap, type, max_channels,
|
|
emu->max_voices, name);
|
|
|
|
return p;
|
|
}
|
|
|
|
|
|
/*
|
|
* release memory block for port
|
|
*/
|
|
static void
|
|
free_port(void *private_data)
|
|
{
|
|
struct snd_emux_port *p;
|
|
|
|
p = private_data;
|
|
if (p) {
|
|
#ifdef SNDRV_EMUX_USE_RAW_EFFECT
|
|
snd_emux_delete_effect(p);
|
|
#endif
|
|
kfree(p->chset.channels);
|
|
kfree(p);
|
|
}
|
|
}
|
|
|
|
|
|
#define DEFAULT_DRUM_FLAGS (1<<9)
|
|
|
|
/*
|
|
* initialize the port specific parameters
|
|
*/
|
|
static void
|
|
snd_emux_init_port(struct snd_emux_port *p)
|
|
{
|
|
p->drum_flags = DEFAULT_DRUM_FLAGS;
|
|
p->volume_atten = 0;
|
|
|
|
snd_emux_reset_port(p);
|
|
}
|
|
|
|
|
|
/*
|
|
* reset port
|
|
*/
|
|
void
|
|
snd_emux_reset_port(struct snd_emux_port *port)
|
|
{
|
|
int i;
|
|
|
|
/* stop all sounds */
|
|
snd_emux_sounds_off_all(port);
|
|
|
|
snd_midi_channel_set_clear(&port->chset);
|
|
|
|
#ifdef SNDRV_EMUX_USE_RAW_EFFECT
|
|
snd_emux_clear_effect(port);
|
|
#endif
|
|
|
|
/* set port specific control parameters */
|
|
port->ctrls[EMUX_MD_DEF_BANK] = 0;
|
|
port->ctrls[EMUX_MD_DEF_DRUM] = 0;
|
|
port->ctrls[EMUX_MD_REALTIME_PAN] = 1;
|
|
|
|
for (i = 0; i < port->chset.max_channels; i++) {
|
|
struct snd_midi_channel *chan = port->chset.channels + i;
|
|
chan->drum_channel = ((port->drum_flags >> i) & 1) ? 1 : 0;
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* input sequencer event
|
|
*/
|
|
int
|
|
snd_emux_event_input(struct snd_seq_event *ev, int direct, void *private_data,
|
|
int atomic, int hop)
|
|
{
|
|
struct snd_emux_port *port;
|
|
|
|
port = private_data;
|
|
if (snd_BUG_ON(!port || !ev))
|
|
return -EINVAL;
|
|
|
|
snd_midi_process_event(&emux_ops, ev, &port->chset);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*
|
|
* increment usage count
|
|
*/
|
|
static int
|
|
__snd_emux_inc_count(struct snd_emux *emu)
|
|
{
|
|
emu->used++;
|
|
if (!try_module_get(emu->ops.owner))
|
|
goto __error;
|
|
if (!try_module_get(emu->card->module)) {
|
|
module_put(emu->ops.owner);
|
|
__error:
|
|
emu->used--;
|
|
return 0;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
int snd_emux_inc_count(struct snd_emux *emu)
|
|
{
|
|
int ret;
|
|
|
|
mutex_lock(&emu->register_mutex);
|
|
ret = __snd_emux_inc_count(emu);
|
|
mutex_unlock(&emu->register_mutex);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* decrease usage count
|
|
*/
|
|
static void
|
|
__snd_emux_dec_count(struct snd_emux *emu)
|
|
{
|
|
module_put(emu->card->module);
|
|
emu->used--;
|
|
if (emu->used <= 0)
|
|
snd_emux_terminate_all(emu);
|
|
module_put(emu->ops.owner);
|
|
}
|
|
|
|
void snd_emux_dec_count(struct snd_emux *emu)
|
|
{
|
|
mutex_lock(&emu->register_mutex);
|
|
__snd_emux_dec_count(emu);
|
|
mutex_unlock(&emu->register_mutex);
|
|
}
|
|
|
|
/*
|
|
* Routine that is called upon a first use of a particular port
|
|
*/
|
|
static int
|
|
snd_emux_use(void *private_data, struct snd_seq_port_subscribe *info)
|
|
{
|
|
struct snd_emux_port *p;
|
|
struct snd_emux *emu;
|
|
|
|
p = private_data;
|
|
if (snd_BUG_ON(!p))
|
|
return -EINVAL;
|
|
emu = p->emu;
|
|
if (snd_BUG_ON(!emu))
|
|
return -EINVAL;
|
|
|
|
mutex_lock(&emu->register_mutex);
|
|
snd_emux_init_port(p);
|
|
__snd_emux_inc_count(emu);
|
|
mutex_unlock(&emu->register_mutex);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Routine that is called upon the last unuse() of a particular port.
|
|
*/
|
|
static int
|
|
snd_emux_unuse(void *private_data, struct snd_seq_port_subscribe *info)
|
|
{
|
|
struct snd_emux_port *p;
|
|
struct snd_emux *emu;
|
|
|
|
p = private_data;
|
|
if (snd_BUG_ON(!p))
|
|
return -EINVAL;
|
|
emu = p->emu;
|
|
if (snd_BUG_ON(!emu))
|
|
return -EINVAL;
|
|
|
|
mutex_lock(&emu->register_mutex);
|
|
snd_emux_sounds_off_all(p);
|
|
__snd_emux_dec_count(emu);
|
|
mutex_unlock(&emu->register_mutex);
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*
|
|
* attach virtual rawmidi devices
|
|
*/
|
|
int snd_emux_init_virmidi(struct snd_emux *emu, struct snd_card *card)
|
|
{
|
|
int i;
|
|
|
|
emu->vmidi = NULL;
|
|
if (emu->midi_ports <= 0)
|
|
return 0;
|
|
|
|
emu->vmidi = kcalloc(emu->midi_ports, sizeof(*emu->vmidi), GFP_KERNEL);
|
|
if (!emu->vmidi)
|
|
return -ENOMEM;
|
|
|
|
for (i = 0; i < emu->midi_ports; i++) {
|
|
struct snd_rawmidi *rmidi;
|
|
struct snd_virmidi_dev *rdev;
|
|
if (snd_virmidi_new(card, emu->midi_devidx + i, &rmidi) < 0)
|
|
goto __error;
|
|
rdev = rmidi->private_data;
|
|
sprintf(rmidi->name, "%s Synth MIDI", emu->name);
|
|
rdev->seq_mode = SNDRV_VIRMIDI_SEQ_ATTACH;
|
|
rdev->client = emu->client;
|
|
rdev->port = emu->ports[i];
|
|
if (snd_device_register(card, rmidi) < 0) {
|
|
snd_device_free(card, rmidi);
|
|
goto __error;
|
|
}
|
|
emu->vmidi[i] = rmidi;
|
|
/* snd_printk(KERN_DEBUG "virmidi %d ok\n", i); */
|
|
}
|
|
return 0;
|
|
|
|
__error:
|
|
/* snd_printk(KERN_DEBUG "error init..\n"); */
|
|
snd_emux_delete_virmidi(emu);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
int snd_emux_delete_virmidi(struct snd_emux *emu)
|
|
{
|
|
int i;
|
|
|
|
if (!emu->vmidi)
|
|
return 0;
|
|
|
|
for (i = 0; i < emu->midi_ports; i++) {
|
|
if (emu->vmidi[i])
|
|
snd_device_free(emu->card, emu->vmidi[i]);
|
|
}
|
|
kfree(emu->vmidi);
|
|
emu->vmidi = NULL;
|
|
return 0;
|
|
}
|