![Jie Yang](/assets/img/avatar_default.png)
We may disable proc fs only for sound part, to reduce ALSA memory footprint. So add CONFIG_SND_PROC_FS and replace the old CONFIG_PROC_FSs in alsa code. With sound proc fs disabled, we can save about 9KB memory size on X86_64 platform. Signed-off-by: Jie Yang <yang.jie@intel.com> Reviewed-by: Mark Brown <broonie@kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
709 lines
16 KiB
C
709 lines
16 KiB
C
/*
|
|
* OSS compatible sequencer driver
|
|
*
|
|
* MIDI device handlers
|
|
*
|
|
* Copyright (C) 1998,99 Takashi Iwai <tiwai@suse.de>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
|
|
#include <sound/asoundef.h>
|
|
#include "seq_oss_midi.h"
|
|
#include "seq_oss_readq.h"
|
|
#include "seq_oss_timer.h"
|
|
#include "seq_oss_event.h"
|
|
#include <sound/seq_midi_event.h>
|
|
#include "../seq_lock.h"
|
|
#include <linux/init.h>
|
|
#include <linux/slab.h>
|
|
|
|
|
|
/*
|
|
* constants
|
|
*/
|
|
#define SNDRV_SEQ_OSS_MAX_MIDI_NAME 30
|
|
|
|
/*
|
|
* definition of midi device record
|
|
*/
|
|
struct seq_oss_midi {
|
|
int seq_device; /* device number */
|
|
int client; /* sequencer client number */
|
|
int port; /* sequencer port number */
|
|
unsigned int flags; /* port capability */
|
|
int opened; /* flag for opening */
|
|
unsigned char name[SNDRV_SEQ_OSS_MAX_MIDI_NAME];
|
|
struct snd_midi_event *coder; /* MIDI event coder */
|
|
struct seq_oss_devinfo *devinfo; /* assigned OSSseq device */
|
|
snd_use_lock_t use_lock;
|
|
};
|
|
|
|
|
|
/*
|
|
* midi device table
|
|
*/
|
|
static int max_midi_devs;
|
|
static struct seq_oss_midi *midi_devs[SNDRV_SEQ_OSS_MAX_MIDI_DEVS];
|
|
|
|
static DEFINE_SPINLOCK(register_lock);
|
|
|
|
/*
|
|
* prototypes
|
|
*/
|
|
static struct seq_oss_midi *get_mdev(int dev);
|
|
static struct seq_oss_midi *get_mididev(struct seq_oss_devinfo *dp, int dev);
|
|
static int send_synth_event(struct seq_oss_devinfo *dp, struct snd_seq_event *ev, int dev);
|
|
static int send_midi_event(struct seq_oss_devinfo *dp, struct snd_seq_event *ev, struct seq_oss_midi *mdev);
|
|
|
|
/*
|
|
* look up the existing ports
|
|
* this looks a very exhausting job.
|
|
*/
|
|
int
|
|
snd_seq_oss_midi_lookup_ports(int client)
|
|
{
|
|
struct snd_seq_client_info *clinfo;
|
|
struct snd_seq_port_info *pinfo;
|
|
|
|
clinfo = kzalloc(sizeof(*clinfo), GFP_KERNEL);
|
|
pinfo = kzalloc(sizeof(*pinfo), GFP_KERNEL);
|
|
if (! clinfo || ! pinfo) {
|
|
kfree(clinfo);
|
|
kfree(pinfo);
|
|
return -ENOMEM;
|
|
}
|
|
clinfo->client = -1;
|
|
while (snd_seq_kernel_client_ctl(client, SNDRV_SEQ_IOCTL_QUERY_NEXT_CLIENT, clinfo) == 0) {
|
|
if (clinfo->client == client)
|
|
continue; /* ignore myself */
|
|
pinfo->addr.client = clinfo->client;
|
|
pinfo->addr.port = -1;
|
|
while (snd_seq_kernel_client_ctl(client, SNDRV_SEQ_IOCTL_QUERY_NEXT_PORT, pinfo) == 0)
|
|
snd_seq_oss_midi_check_new_port(pinfo);
|
|
}
|
|
kfree(clinfo);
|
|
kfree(pinfo);
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*
|
|
*/
|
|
static struct seq_oss_midi *
|
|
get_mdev(int dev)
|
|
{
|
|
struct seq_oss_midi *mdev;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(®ister_lock, flags);
|
|
mdev = midi_devs[dev];
|
|
if (mdev)
|
|
snd_use_lock_use(&mdev->use_lock);
|
|
spin_unlock_irqrestore(®ister_lock, flags);
|
|
return mdev;
|
|
}
|
|
|
|
/*
|
|
* look for the identical slot
|
|
*/
|
|
static struct seq_oss_midi *
|
|
find_slot(int client, int port)
|
|
{
|
|
int i;
|
|
struct seq_oss_midi *mdev;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(®ister_lock, flags);
|
|
for (i = 0; i < max_midi_devs; i++) {
|
|
mdev = midi_devs[i];
|
|
if (mdev && mdev->client == client && mdev->port == port) {
|
|
/* found! */
|
|
snd_use_lock_use(&mdev->use_lock);
|
|
spin_unlock_irqrestore(®ister_lock, flags);
|
|
return mdev;
|
|
}
|
|
}
|
|
spin_unlock_irqrestore(®ister_lock, flags);
|
|
return NULL;
|
|
}
|
|
|
|
|
|
#define PERM_WRITE (SNDRV_SEQ_PORT_CAP_WRITE|SNDRV_SEQ_PORT_CAP_SUBS_WRITE)
|
|
#define PERM_READ (SNDRV_SEQ_PORT_CAP_READ|SNDRV_SEQ_PORT_CAP_SUBS_READ)
|
|
/*
|
|
* register a new port if it doesn't exist yet
|
|
*/
|
|
int
|
|
snd_seq_oss_midi_check_new_port(struct snd_seq_port_info *pinfo)
|
|
{
|
|
int i;
|
|
struct seq_oss_midi *mdev;
|
|
unsigned long flags;
|
|
|
|
/* the port must include generic midi */
|
|
if (! (pinfo->type & SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC))
|
|
return 0;
|
|
/* either read or write subscribable */
|
|
if ((pinfo->capability & PERM_WRITE) != PERM_WRITE &&
|
|
(pinfo->capability & PERM_READ) != PERM_READ)
|
|
return 0;
|
|
|
|
/*
|
|
* look for the identical slot
|
|
*/
|
|
if ((mdev = find_slot(pinfo->addr.client, pinfo->addr.port)) != NULL) {
|
|
/* already exists */
|
|
snd_use_lock_free(&mdev->use_lock);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* allocate midi info record
|
|
*/
|
|
mdev = kzalloc(sizeof(*mdev), GFP_KERNEL);
|
|
if (!mdev)
|
|
return -ENOMEM;
|
|
|
|
/* copy the port information */
|
|
mdev->client = pinfo->addr.client;
|
|
mdev->port = pinfo->addr.port;
|
|
mdev->flags = pinfo->capability;
|
|
mdev->opened = 0;
|
|
snd_use_lock_init(&mdev->use_lock);
|
|
|
|
/* copy and truncate the name of synth device */
|
|
strlcpy(mdev->name, pinfo->name, sizeof(mdev->name));
|
|
|
|
/* create MIDI coder */
|
|
if (snd_midi_event_new(MAX_MIDI_EVENT_BUF, &mdev->coder) < 0) {
|
|
pr_err("ALSA: seq_oss: can't malloc midi coder\n");
|
|
kfree(mdev);
|
|
return -ENOMEM;
|
|
}
|
|
/* OSS sequencer adds running status to all sequences */
|
|
snd_midi_event_no_status(mdev->coder, 1);
|
|
|
|
/*
|
|
* look for en empty slot
|
|
*/
|
|
spin_lock_irqsave(®ister_lock, flags);
|
|
for (i = 0; i < max_midi_devs; i++) {
|
|
if (midi_devs[i] == NULL)
|
|
break;
|
|
}
|
|
if (i >= max_midi_devs) {
|
|
if (max_midi_devs >= SNDRV_SEQ_OSS_MAX_MIDI_DEVS) {
|
|
spin_unlock_irqrestore(®ister_lock, flags);
|
|
snd_midi_event_free(mdev->coder);
|
|
kfree(mdev);
|
|
return -ENOMEM;
|
|
}
|
|
max_midi_devs++;
|
|
}
|
|
mdev->seq_device = i;
|
|
midi_devs[mdev->seq_device] = mdev;
|
|
spin_unlock_irqrestore(®ister_lock, flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* release the midi device if it was registered
|
|
*/
|
|
int
|
|
snd_seq_oss_midi_check_exit_port(int client, int port)
|
|
{
|
|
struct seq_oss_midi *mdev;
|
|
unsigned long flags;
|
|
int index;
|
|
|
|
if ((mdev = find_slot(client, port)) != NULL) {
|
|
spin_lock_irqsave(®ister_lock, flags);
|
|
midi_devs[mdev->seq_device] = NULL;
|
|
spin_unlock_irqrestore(®ister_lock, flags);
|
|
snd_use_lock_free(&mdev->use_lock);
|
|
snd_use_lock_sync(&mdev->use_lock);
|
|
snd_midi_event_free(mdev->coder);
|
|
kfree(mdev);
|
|
}
|
|
spin_lock_irqsave(®ister_lock, flags);
|
|
for (index = max_midi_devs - 1; index >= 0; index--) {
|
|
if (midi_devs[index])
|
|
break;
|
|
}
|
|
max_midi_devs = index + 1;
|
|
spin_unlock_irqrestore(®ister_lock, flags);
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*
|
|
* release the midi device if it was registered
|
|
*/
|
|
void
|
|
snd_seq_oss_midi_clear_all(void)
|
|
{
|
|
int i;
|
|
struct seq_oss_midi *mdev;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(®ister_lock, flags);
|
|
for (i = 0; i < max_midi_devs; i++) {
|
|
if ((mdev = midi_devs[i]) != NULL) {
|
|
snd_midi_event_free(mdev->coder);
|
|
kfree(mdev);
|
|
midi_devs[i] = NULL;
|
|
}
|
|
}
|
|
max_midi_devs = 0;
|
|
spin_unlock_irqrestore(®ister_lock, flags);
|
|
}
|
|
|
|
|
|
/*
|
|
* set up midi tables
|
|
*/
|
|
void
|
|
snd_seq_oss_midi_setup(struct seq_oss_devinfo *dp)
|
|
{
|
|
dp->max_mididev = max_midi_devs;
|
|
}
|
|
|
|
/*
|
|
* clean up midi tables
|
|
*/
|
|
void
|
|
snd_seq_oss_midi_cleanup(struct seq_oss_devinfo *dp)
|
|
{
|
|
int i;
|
|
for (i = 0; i < dp->max_mididev; i++)
|
|
snd_seq_oss_midi_close(dp, i);
|
|
dp->max_mididev = 0;
|
|
}
|
|
|
|
|
|
/*
|
|
* open all midi devices. ignore errors.
|
|
*/
|
|
void
|
|
snd_seq_oss_midi_open_all(struct seq_oss_devinfo *dp, int file_mode)
|
|
{
|
|
int i;
|
|
for (i = 0; i < dp->max_mididev; i++)
|
|
snd_seq_oss_midi_open(dp, i, file_mode);
|
|
}
|
|
|
|
|
|
/*
|
|
* get the midi device information
|
|
*/
|
|
static struct seq_oss_midi *
|
|
get_mididev(struct seq_oss_devinfo *dp, int dev)
|
|
{
|
|
if (dev < 0 || dev >= dp->max_mididev)
|
|
return NULL;
|
|
return get_mdev(dev);
|
|
}
|
|
|
|
|
|
/*
|
|
* open the midi device if not opened yet
|
|
*/
|
|
int
|
|
snd_seq_oss_midi_open(struct seq_oss_devinfo *dp, int dev, int fmode)
|
|
{
|
|
int perm;
|
|
struct seq_oss_midi *mdev;
|
|
struct snd_seq_port_subscribe subs;
|
|
|
|
if ((mdev = get_mididev(dp, dev)) == NULL)
|
|
return -ENODEV;
|
|
|
|
/* already used? */
|
|
if (mdev->opened && mdev->devinfo != dp) {
|
|
snd_use_lock_free(&mdev->use_lock);
|
|
return -EBUSY;
|
|
}
|
|
|
|
perm = 0;
|
|
if (is_write_mode(fmode))
|
|
perm |= PERM_WRITE;
|
|
if (is_read_mode(fmode))
|
|
perm |= PERM_READ;
|
|
perm &= mdev->flags;
|
|
if (perm == 0) {
|
|
snd_use_lock_free(&mdev->use_lock);
|
|
return -ENXIO;
|
|
}
|
|
|
|
/* already opened? */
|
|
if ((mdev->opened & perm) == perm) {
|
|
snd_use_lock_free(&mdev->use_lock);
|
|
return 0;
|
|
}
|
|
|
|
perm &= ~mdev->opened;
|
|
|
|
memset(&subs, 0, sizeof(subs));
|
|
|
|
if (perm & PERM_WRITE) {
|
|
subs.sender = dp->addr;
|
|
subs.dest.client = mdev->client;
|
|
subs.dest.port = mdev->port;
|
|
if (snd_seq_kernel_client_ctl(dp->cseq, SNDRV_SEQ_IOCTL_SUBSCRIBE_PORT, &subs) >= 0)
|
|
mdev->opened |= PERM_WRITE;
|
|
}
|
|
if (perm & PERM_READ) {
|
|
subs.sender.client = mdev->client;
|
|
subs.sender.port = mdev->port;
|
|
subs.dest = dp->addr;
|
|
subs.flags = SNDRV_SEQ_PORT_SUBS_TIMESTAMP;
|
|
subs.queue = dp->queue; /* queue for timestamps */
|
|
if (snd_seq_kernel_client_ctl(dp->cseq, SNDRV_SEQ_IOCTL_SUBSCRIBE_PORT, &subs) >= 0)
|
|
mdev->opened |= PERM_READ;
|
|
}
|
|
|
|
if (! mdev->opened) {
|
|
snd_use_lock_free(&mdev->use_lock);
|
|
return -ENXIO;
|
|
}
|
|
|
|
mdev->devinfo = dp;
|
|
snd_use_lock_free(&mdev->use_lock);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* close the midi device if already opened
|
|
*/
|
|
int
|
|
snd_seq_oss_midi_close(struct seq_oss_devinfo *dp, int dev)
|
|
{
|
|
struct seq_oss_midi *mdev;
|
|
struct snd_seq_port_subscribe subs;
|
|
|
|
if ((mdev = get_mididev(dp, dev)) == NULL)
|
|
return -ENODEV;
|
|
if (! mdev->opened || mdev->devinfo != dp) {
|
|
snd_use_lock_free(&mdev->use_lock);
|
|
return 0;
|
|
}
|
|
|
|
memset(&subs, 0, sizeof(subs));
|
|
if (mdev->opened & PERM_WRITE) {
|
|
subs.sender = dp->addr;
|
|
subs.dest.client = mdev->client;
|
|
subs.dest.port = mdev->port;
|
|
snd_seq_kernel_client_ctl(dp->cseq, SNDRV_SEQ_IOCTL_UNSUBSCRIBE_PORT, &subs);
|
|
}
|
|
if (mdev->opened & PERM_READ) {
|
|
subs.sender.client = mdev->client;
|
|
subs.sender.port = mdev->port;
|
|
subs.dest = dp->addr;
|
|
snd_seq_kernel_client_ctl(dp->cseq, SNDRV_SEQ_IOCTL_UNSUBSCRIBE_PORT, &subs);
|
|
}
|
|
|
|
mdev->opened = 0;
|
|
mdev->devinfo = NULL;
|
|
|
|
snd_use_lock_free(&mdev->use_lock);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* change seq capability flags to file mode flags
|
|
*/
|
|
int
|
|
snd_seq_oss_midi_filemode(struct seq_oss_devinfo *dp, int dev)
|
|
{
|
|
struct seq_oss_midi *mdev;
|
|
int mode;
|
|
|
|
if ((mdev = get_mididev(dp, dev)) == NULL)
|
|
return 0;
|
|
|
|
mode = 0;
|
|
if (mdev->opened & PERM_WRITE)
|
|
mode |= SNDRV_SEQ_OSS_FILE_WRITE;
|
|
if (mdev->opened & PERM_READ)
|
|
mode |= SNDRV_SEQ_OSS_FILE_READ;
|
|
|
|
snd_use_lock_free(&mdev->use_lock);
|
|
return mode;
|
|
}
|
|
|
|
/*
|
|
* reset the midi device and close it:
|
|
* so far, only close the device.
|
|
*/
|
|
void
|
|
snd_seq_oss_midi_reset(struct seq_oss_devinfo *dp, int dev)
|
|
{
|
|
struct seq_oss_midi *mdev;
|
|
|
|
if ((mdev = get_mididev(dp, dev)) == NULL)
|
|
return;
|
|
if (! mdev->opened) {
|
|
snd_use_lock_free(&mdev->use_lock);
|
|
return;
|
|
}
|
|
|
|
if (mdev->opened & PERM_WRITE) {
|
|
struct snd_seq_event ev;
|
|
int c;
|
|
|
|
memset(&ev, 0, sizeof(ev));
|
|
ev.dest.client = mdev->client;
|
|
ev.dest.port = mdev->port;
|
|
ev.queue = dp->queue;
|
|
ev.source.port = dp->port;
|
|
if (dp->seq_mode == SNDRV_SEQ_OSS_MODE_SYNTH) {
|
|
ev.type = SNDRV_SEQ_EVENT_SENSING;
|
|
snd_seq_oss_dispatch(dp, &ev, 0, 0);
|
|
}
|
|
for (c = 0; c < 16; c++) {
|
|
ev.type = SNDRV_SEQ_EVENT_CONTROLLER;
|
|
ev.data.control.channel = c;
|
|
ev.data.control.param = MIDI_CTL_ALL_NOTES_OFF;
|
|
snd_seq_oss_dispatch(dp, &ev, 0, 0);
|
|
if (dp->seq_mode == SNDRV_SEQ_OSS_MODE_MUSIC) {
|
|
ev.data.control.param =
|
|
MIDI_CTL_RESET_CONTROLLERS;
|
|
snd_seq_oss_dispatch(dp, &ev, 0, 0);
|
|
ev.type = SNDRV_SEQ_EVENT_PITCHBEND;
|
|
ev.data.control.value = 0;
|
|
snd_seq_oss_dispatch(dp, &ev, 0, 0);
|
|
}
|
|
}
|
|
}
|
|
// snd_seq_oss_midi_close(dp, dev);
|
|
snd_use_lock_free(&mdev->use_lock);
|
|
}
|
|
|
|
|
|
/*
|
|
* get client/port of the specified MIDI device
|
|
*/
|
|
void
|
|
snd_seq_oss_midi_get_addr(struct seq_oss_devinfo *dp, int dev, struct snd_seq_addr *addr)
|
|
{
|
|
struct seq_oss_midi *mdev;
|
|
|
|
if ((mdev = get_mididev(dp, dev)) == NULL)
|
|
return;
|
|
addr->client = mdev->client;
|
|
addr->port = mdev->port;
|
|
snd_use_lock_free(&mdev->use_lock);
|
|
}
|
|
|
|
|
|
/*
|
|
* input callback - this can be atomic
|
|
*/
|
|
int
|
|
snd_seq_oss_midi_input(struct snd_seq_event *ev, int direct, void *private_data)
|
|
{
|
|
struct seq_oss_devinfo *dp = (struct seq_oss_devinfo *)private_data;
|
|
struct seq_oss_midi *mdev;
|
|
int rc;
|
|
|
|
if (dp->readq == NULL)
|
|
return 0;
|
|
if ((mdev = find_slot(ev->source.client, ev->source.port)) == NULL)
|
|
return 0;
|
|
if (! (mdev->opened & PERM_READ)) {
|
|
snd_use_lock_free(&mdev->use_lock);
|
|
return 0;
|
|
}
|
|
|
|
if (dp->seq_mode == SNDRV_SEQ_OSS_MODE_MUSIC)
|
|
rc = send_synth_event(dp, ev, mdev->seq_device);
|
|
else
|
|
rc = send_midi_event(dp, ev, mdev);
|
|
|
|
snd_use_lock_free(&mdev->use_lock);
|
|
return rc;
|
|
}
|
|
|
|
/*
|
|
* convert ALSA sequencer event to OSS synth event
|
|
*/
|
|
static int
|
|
send_synth_event(struct seq_oss_devinfo *dp, struct snd_seq_event *ev, int dev)
|
|
{
|
|
union evrec ossev;
|
|
|
|
memset(&ossev, 0, sizeof(ossev));
|
|
|
|
switch (ev->type) {
|
|
case SNDRV_SEQ_EVENT_NOTEON:
|
|
ossev.v.cmd = MIDI_NOTEON; break;
|
|
case SNDRV_SEQ_EVENT_NOTEOFF:
|
|
ossev.v.cmd = MIDI_NOTEOFF; break;
|
|
case SNDRV_SEQ_EVENT_KEYPRESS:
|
|
ossev.v.cmd = MIDI_KEY_PRESSURE; break;
|
|
case SNDRV_SEQ_EVENT_CONTROLLER:
|
|
ossev.l.cmd = MIDI_CTL_CHANGE; break;
|
|
case SNDRV_SEQ_EVENT_PGMCHANGE:
|
|
ossev.l.cmd = MIDI_PGM_CHANGE; break;
|
|
case SNDRV_SEQ_EVENT_CHANPRESS:
|
|
ossev.l.cmd = MIDI_CHN_PRESSURE; break;
|
|
case SNDRV_SEQ_EVENT_PITCHBEND:
|
|
ossev.l.cmd = MIDI_PITCH_BEND; break;
|
|
default:
|
|
return 0; /* not supported */
|
|
}
|
|
|
|
ossev.v.dev = dev;
|
|
|
|
switch (ev->type) {
|
|
case SNDRV_SEQ_EVENT_NOTEON:
|
|
case SNDRV_SEQ_EVENT_NOTEOFF:
|
|
case SNDRV_SEQ_EVENT_KEYPRESS:
|
|
ossev.v.code = EV_CHN_VOICE;
|
|
ossev.v.note = ev->data.note.note;
|
|
ossev.v.parm = ev->data.note.velocity;
|
|
ossev.v.chn = ev->data.note.channel;
|
|
break;
|
|
case SNDRV_SEQ_EVENT_CONTROLLER:
|
|
case SNDRV_SEQ_EVENT_PGMCHANGE:
|
|
case SNDRV_SEQ_EVENT_CHANPRESS:
|
|
ossev.l.code = EV_CHN_COMMON;
|
|
ossev.l.p1 = ev->data.control.param;
|
|
ossev.l.val = ev->data.control.value;
|
|
ossev.l.chn = ev->data.control.channel;
|
|
break;
|
|
case SNDRV_SEQ_EVENT_PITCHBEND:
|
|
ossev.l.code = EV_CHN_COMMON;
|
|
ossev.l.val = ev->data.control.value + 8192;
|
|
ossev.l.chn = ev->data.control.channel;
|
|
break;
|
|
}
|
|
|
|
snd_seq_oss_readq_put_timestamp(dp->readq, ev->time.tick, dp->seq_mode);
|
|
snd_seq_oss_readq_put_event(dp->readq, &ossev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* decode event and send MIDI bytes to read queue
|
|
*/
|
|
static int
|
|
send_midi_event(struct seq_oss_devinfo *dp, struct snd_seq_event *ev, struct seq_oss_midi *mdev)
|
|
{
|
|
char msg[32];
|
|
int len;
|
|
|
|
snd_seq_oss_readq_put_timestamp(dp->readq, ev->time.tick, dp->seq_mode);
|
|
if (!dp->timer->running)
|
|
len = snd_seq_oss_timer_start(dp->timer);
|
|
if (ev->type == SNDRV_SEQ_EVENT_SYSEX) {
|
|
if ((ev->flags & SNDRV_SEQ_EVENT_LENGTH_MASK) == SNDRV_SEQ_EVENT_LENGTH_VARIABLE)
|
|
snd_seq_oss_readq_puts(dp->readq, mdev->seq_device,
|
|
ev->data.ext.ptr, ev->data.ext.len);
|
|
} else {
|
|
len = snd_midi_event_decode(mdev->coder, msg, sizeof(msg), ev);
|
|
if (len > 0)
|
|
snd_seq_oss_readq_puts(dp->readq, mdev->seq_device, msg, len);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*
|
|
* dump midi data
|
|
* return 0 : enqueued
|
|
* non-zero : invalid - ignored
|
|
*/
|
|
int
|
|
snd_seq_oss_midi_putc(struct seq_oss_devinfo *dp, int dev, unsigned char c, struct snd_seq_event *ev)
|
|
{
|
|
struct seq_oss_midi *mdev;
|
|
|
|
if ((mdev = get_mididev(dp, dev)) == NULL)
|
|
return -ENODEV;
|
|
if (snd_midi_event_encode_byte(mdev->coder, c, ev) > 0) {
|
|
snd_seq_oss_fill_addr(dp, ev, mdev->client, mdev->port);
|
|
snd_use_lock_free(&mdev->use_lock);
|
|
return 0;
|
|
}
|
|
snd_use_lock_free(&mdev->use_lock);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/*
|
|
* create OSS compatible midi_info record
|
|
*/
|
|
int
|
|
snd_seq_oss_midi_make_info(struct seq_oss_devinfo *dp, int dev, struct midi_info *inf)
|
|
{
|
|
struct seq_oss_midi *mdev;
|
|
|
|
if ((mdev = get_mididev(dp, dev)) == NULL)
|
|
return -ENXIO;
|
|
inf->device = dev;
|
|
inf->dev_type = 0; /* FIXME: ?? */
|
|
inf->capabilities = 0; /* FIXME: ?? */
|
|
strlcpy(inf->name, mdev->name, sizeof(inf->name));
|
|
snd_use_lock_free(&mdev->use_lock);
|
|
return 0;
|
|
}
|
|
|
|
|
|
#ifdef CONFIG_SND_PROC_FS
|
|
/*
|
|
* proc interface
|
|
*/
|
|
static char *
|
|
capmode_str(int val)
|
|
{
|
|
val &= PERM_READ|PERM_WRITE;
|
|
if (val == (PERM_READ|PERM_WRITE))
|
|
return "read/write";
|
|
else if (val == PERM_READ)
|
|
return "read";
|
|
else if (val == PERM_WRITE)
|
|
return "write";
|
|
else
|
|
return "none";
|
|
}
|
|
|
|
void
|
|
snd_seq_oss_midi_info_read(struct snd_info_buffer *buf)
|
|
{
|
|
int i;
|
|
struct seq_oss_midi *mdev;
|
|
|
|
snd_iprintf(buf, "\nNumber of MIDI devices: %d\n", max_midi_devs);
|
|
for (i = 0; i < max_midi_devs; i++) {
|
|
snd_iprintf(buf, "\nmidi %d: ", i);
|
|
mdev = get_mdev(i);
|
|
if (mdev == NULL) {
|
|
snd_iprintf(buf, "*empty*\n");
|
|
continue;
|
|
}
|
|
snd_iprintf(buf, "[%s] ALSA port %d:%d\n", mdev->name,
|
|
mdev->client, mdev->port);
|
|
snd_iprintf(buf, " capability %s / opened %s\n",
|
|
capmode_str(mdev->flags),
|
|
capmode_str(mdev->opened));
|
|
snd_use_lock_free(&mdev->use_lock);
|
|
}
|
|
}
|
|
#endif /* CONFIG_SND_PROC_FS */
|