void AlsaSeqMidiInDriver::open(device_id_t device)
{
if (this->is_open())
throw std::logic_error("Device already open");
int err;
err = snd_seq_open(&m_impl->seq, "default", SND_SEQ_OPEN_INPUT,
SND_SEQ_NONBLOCK);
if ( err < 0)
{
throw std::runtime_error("Error opening ALSA sequencer.");
}
std::ostringstream os;
os << "gephex input " << device;
std::string device_name = os.str();
err = snd_seq_set_client_name(m_impl->seq, device_name.c_str());
err = snd_seq_create_simple_port(m_impl->seq, device_name.c_str(),
SND_SEQ_PORT_CAP_WRITE|
SND_SEQ_PORT_CAP_SUBS_WRITE,
SND_SEQ_PORT_TYPE_APPLICATION);
if (err < 0)
{
snd_seq_close (m_impl->seq);
throw std::runtime_error("Error creating sequencer port.");
}
else
{
m_impl->portid = err;
snd_seq_ev_clear (&m_impl->SEv);
snd_seq_ev_set_source (&m_impl->SEv, m_impl->portid);
snd_seq_ev_set_subs (&m_impl->SEv);
snd_seq_ev_set_direct (&m_impl->SEv);
}
if( snd_midi_event_new (32, &m_impl->decoder) )
throw std::runtime_error ("Error creating midi event parser");
snd_midi_event_init(m_impl->decoder);
snd_midi_event_no_status (m_impl->decoder,1);
}
/*
* 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;
}
int snd_rawmidi_virtual_open(snd_rawmidi_t **inputp, snd_rawmidi_t **outputp,
const char *name, snd_seq_t *seq_handle, int port,
int merge, int mode)
{
int err;
snd_rawmidi_t *rmidi;
snd_rawmidi_virtual_t *virt = NULL;
struct pollfd pfd;
if (inputp)
*inputp = 0;
if (outputp)
*outputp = 0;
virt = calloc(1, sizeof(*virt));
if (virt == NULL) {
err = -ENOMEM;
goto _err;
}
virt->handle = seq_handle;
virt->port = port;
err = snd_midi_event_new(256, &virt->midi_event);
if (err < 0)
goto _err;
snd_midi_event_init(virt->midi_event);
snd_midi_event_no_status(virt->midi_event, !merge);
if (inputp) {
rmidi = calloc(1, sizeof(*rmidi));
if (rmidi == NULL) {
err = -ENOMEM;
goto _err;
}
if (name)
rmidi->name = strdup(name);
rmidi->type = SND_RAWMIDI_TYPE_VIRTUAL;
rmidi->stream = SND_RAWMIDI_STREAM_INPUT;
rmidi->mode = mode;
err = snd_seq_poll_descriptors(seq_handle, &pfd, 1, POLLIN);
if (err < 0)
goto _err;
rmidi->poll_fd = pfd.fd;
rmidi->ops = &snd_rawmidi_virtual_ops;
rmidi->private_data = virt;
virt->open++;
*inputp = rmidi;
}
if (outputp) {
rmidi = calloc(1, sizeof(*rmidi));
if (rmidi == NULL) {
err = -ENOMEM;
goto _err;
}
if (name)
rmidi->name = strdup(name);
rmidi->type = SND_RAWMIDI_TYPE_VIRTUAL;
rmidi->stream = SND_RAWMIDI_STREAM_OUTPUT;
rmidi->mode = mode;
err = snd_seq_poll_descriptors(seq_handle, &pfd, 1, POLLOUT);
if (err < 0)
goto _err;
rmidi->poll_fd = pfd.fd;
rmidi->ops = &snd_rawmidi_virtual_ops;
rmidi->private_data = virt;
virt->open++;
*outputp = rmidi;
}
return 0;
_err:
if (seq_handle)
snd_seq_close(seq_handle);
if (virt) {
if (virt->midi_event)
snd_midi_event_free(virt->midi_event);
free(virt);
}
if (inputp)
free(*inputp);
if (outputp)
free(*outputp);
return err;
}
int
snd_seq_oss_midi_check_new_port(struct snd_seq_port_info *pinfo)
{
int i;
struct seq_oss_midi *mdev;
unsigned long flags;
debug_printk(("check for MIDI client %d port %d\n", pinfo->addr.client, pinfo->addr.port));
/* */
if (! (pinfo->type & SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC))
return 0;
/* */
if ((pinfo->capability & PERM_WRITE) != PERM_WRITE &&
(pinfo->capability & PERM_READ) != PERM_READ)
return 0;
/*
*/
if ((mdev = find_slot(pinfo->addr.client, pinfo->addr.port)) != NULL) {
/* */
snd_use_lock_free(&mdev->use_lock);
return 0;
}
/*
*/
if ((mdev = kzalloc(sizeof(*mdev), GFP_KERNEL)) == NULL) {
snd_printk(KERN_ERR "can't malloc midi info\n");
return -ENOMEM;
}
/* */
mdev->client = pinfo->addr.client;
mdev->port = pinfo->addr.port;
mdev->flags = pinfo->capability;
mdev->opened = 0;
snd_use_lock_init(&mdev->use_lock);
/* */
strlcpy(mdev->name, pinfo->name, sizeof(mdev->name));
/* */
if (snd_midi_event_new(MAX_MIDI_EVENT_BUF, &mdev->coder) < 0) {
snd_printk(KERN_ERR "can't malloc midi coder\n");
kfree(mdev);
return -ENOMEM;
}
/* */
snd_midi_event_no_status(mdev->coder, 1);
/*
*/
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;
}