/* enqueue a event to singe queue */
int snd_seq_enqueue_event(struct snd_seq_event_cell *cell, int atomic, int hop)
{
int dest, err;
struct snd_seq_queue *q;
if (snd_BUG_ON(!cell))
return -EINVAL;
dest = cell->event.queue; /* destination queue */
q = queueptr(dest);
if (q == NULL)
return -EINVAL;
/* handle relative time stamps, convert them into absolute */
if ((cell->event.flags & SNDRV_SEQ_TIME_MODE_MASK) == SNDRV_SEQ_TIME_MODE_REL) {
switch (cell->event.flags & SNDRV_SEQ_TIME_STAMP_MASK) {
case SNDRV_SEQ_TIME_STAMP_TICK:
cell->event.time.tick += q->timer->tick.cur_tick;
break;
case SNDRV_SEQ_TIME_STAMP_REAL:
snd_seq_inc_real_time(&cell->event.time.time,
&q->timer->cur_time);
break;
}
cell->event.flags &= ~SNDRV_SEQ_TIME_MODE_MASK;
cell->event.flags |= SNDRV_SEQ_TIME_MODE_ABS;
}
/* enqueue event in the real-time or midi queue */
switch (cell->event.flags & SNDRV_SEQ_TIME_STAMP_MASK) {
case SNDRV_SEQ_TIME_STAMP_TICK:
err = snd_seq_prioq_cell_in(q->tickq, cell);
break;
case SNDRV_SEQ_TIME_STAMP_REAL:
default:
err = snd_seq_prioq_cell_in(q->timeq, cell);
break;
}
if (err < 0) {
queuefree(q); /* unlock */
return err;
}
/* trigger dispatching */
snd_seq_check_queue(q, atomic, hop);
queuefree(q); /* unlock */
return 0;
}
/* exported to seq_info.c */
void snd_seq_info_queues_read(struct snd_info_entry *entry,
struct snd_info_buffer *buffer)
{
int i, bpm;
struct snd_seq_queue *q;
struct snd_seq_timer *tmr;
for (i = 0; i < SNDRV_SEQ_MAX_QUEUES; i++) {
if ((q = queueptr(i)) == NULL)
continue;
tmr = q->timer;
if (tmr->tempo)
bpm = 60000000 / tmr->tempo;
else
bpm = 0;
snd_iprintf(buffer, "queue %d: [%s]\n", q->queue, q->name);
snd_iprintf(buffer, "owned by client : %d\n", q->owner);
snd_iprintf(buffer, "lock status : %s\n", q->locked ? "Locked" : "Free");
snd_iprintf(buffer, "queued time events : %d\n", snd_seq_prioq_avail(q->timeq));
snd_iprintf(buffer, "queued tick events : %d\n", snd_seq_prioq_avail(q->tickq));
snd_iprintf(buffer, "timer state : %s\n", tmr->running ? "Running" : "Stopped");
snd_iprintf(buffer, "timer PPQ : %d\n", tmr->ppq);
snd_iprintf(buffer, "current tempo : %d\n", tmr->tempo);
snd_iprintf(buffer, "current BPM : %d\n", bpm);
snd_iprintf(buffer, "current time : %d.%09d s\n", tmr->cur_time.tv_sec, tmr->cur_time.tv_nsec);
snd_iprintf(buffer, "current tick : %d\n", tmr->tick.cur_tick);
snd_iprintf(buffer, "\n");
queuefree(q);
}
}
/* final stage notification -
* remove cells for no longer exist client (for non-owned queue)
* or delete this queue (for owned queue)
*/
void snd_seq_queue_client_leave(int client)
{
int i;
struct snd_seq_queue *q;
/* delete own queues from queue list */
for (i = 0; i < SNDRV_SEQ_MAX_QUEUES; i++) {
if ((q = queue_list_remove(i, client)) != NULL)
queue_delete(q);
}
/* remove cells from existing queues -
* they are not owned by this client
*/
for (i = 0; i < SNDRV_SEQ_MAX_QUEUES; i++) {
if ((q = queueptr(i)) == NULL)
continue;
if (test_bit(client, q->clients_bitmap)) {
snd_seq_prioq_leave(q->tickq, client, 0);
snd_seq_prioq_leave(q->timeq, client, 0);
snd_seq_queue_use(q->queue, client, 0);
}
queuefree(q);
}
}
/* use or unuse this queue -
* if it is the first client, starts the timer.
* if it is not longer used by any clients, stop the timer.
*/
int snd_seq_queue_use(int queueid, int client, int use)
{
struct snd_seq_queue *queue;
queue = queueptr(queueid);
if (queue == NULL)
return -EINVAL;
mutex_lock(&queue->timer_mutex);
if (use) {
if (!test_and_set_bit(client, queue->clients_bitmap))
queue->clients++;
} else {
if (test_and_clear_bit(client, queue->clients_bitmap))
queue->clients--;
}
if (queue->clients) {
if (use && queue->clients == 1)
snd_seq_timer_defaults(queue->timer);
snd_seq_timer_open(queue);
} else {
snd_seq_timer_close(queue);
}
mutex_unlock(&queue->timer_mutex);
queuefree(queue);
return 0;
}
/*
* change queue's owner and permission
*/
int snd_seq_queue_set_owner(int queueid, int client, int locked)
{
struct snd_seq_queue *q = queueptr(queueid);
if (q == NULL)
return -EINVAL;
if (! queue_access_lock(q, client)) {
queuefree(q);
return -EPERM;
}
q->locked = locked ? 1 : 0;
q->owner = client;
queue_access_unlock(q);
queuefree(q);
return 0;
}
/*
* Queue control via timer control port:
* this function is exported as a callback of timer port.
*/
int snd_seq_control_queue(struct snd_seq_event *ev, int atomic, int hop)
{
struct snd_seq_queue *q;
snd_assert(ev != NULL, return -EINVAL);
q = queueptr(ev->data.queue.queue);
if (q == NULL)
return -EINVAL;
if (! queue_access_lock(q, ev->source.client)) {
queuefree(q);
return -EPERM;
}
snd_seq_queue_process_event(q, ev, atomic, hop);
queue_access_unlock(q);
queuefree(q);
return 0;
}
/*
* check if queue is used by the client
* return negative value if the queue is invalid.
* return 0 if not used, 1 if used.
*/
int snd_seq_queue_is_used(int queueid, int client)
{
struct snd_seq_queue *q;
int result;
q = queueptr(queueid);
if (q == NULL)
return -EINVAL; /* invalid queue */
result = test_bit(client, q->clients_bitmap) ? 1 : 0;
queuefree(q);
return result;
}
/* close timer -
* q->use mutex should be down before calling this function
*/
int snd_seq_queue_timer_close(int queueid)
{
struct snd_seq_queue *queue;
int result = 0;
queue = queueptr(queueid);
if (queue == NULL)
return -EINVAL;
snd_seq_timer_close(queue);
queuefree(queue);
return result;
}
/* change queue tempo and ppq */
int snd_seq_queue_timer_set_tempo(int queueid, int client, snd_seq_queue_tempo_t *info)
{
queue_t *q = queueptr(queueid);
int result;
if (q == NULL)
return -EINVAL;
if (! queue_access_lock(q, client)) {
queuefree(q);
return -EPERM;
}
result = snd_seq_timer_set_tempo(q->timer, info->tempo);
if (result >= 0)
result = snd_seq_timer_set_ppq(q->timer, info->ppq);
if (result >= 0 && info->skew_base > 0)
result = snd_seq_timer_set_skew(q->timer, info->skew_value, info->skew_base);
queue_access_unlock(q);
queuefree(q);
return result;
}
/* remove cells from all queues */
void snd_seq_queue_client_leave_cells(int client)
{
int i;
struct snd_seq_queue *q;
for (i = 0; i < SNDRV_SEQ_MAX_QUEUES; i++) {
if ((q = queueptr(i)) == NULL)
continue;
snd_seq_prioq_leave(q->tickq, client, 0);
snd_seq_prioq_leave(q->timeq, client, 0);
queuefree(q);
}
}
/* exported - only checking permission */
int snd_seq_queue_check_access(int queueid, int client)
{
struct snd_seq_queue *q = queueptr(queueid);
int access_ok;
unsigned long flags;
if (! q)
return 0;
spin_lock_irqsave(&q->owner_lock, flags);
access_ok = check_access(q, client);
spin_unlock_irqrestore(&q->owner_lock, flags);
queuefree(q);
return access_ok;
}
/* return the (first) queue matching with the specified name */
struct snd_seq_queue *snd_seq_queue_find_name(char *name)
{
int i;
struct snd_seq_queue *q;
for (i = 0; i < SNDRV_SEQ_MAX_QUEUES; i++) {
if ((q = queueptr(i)) != NULL) {
if (strncmp(q->name, name, sizeof(q->name)) == 0)
return q;
queuefree(q);
}
}
return NULL;
}
/* close timer -
* q->use mutex should be down before calling this function
*/
int snd_seq_queue_timer_close(int queueid)
{
queue_t *queue;
seq_timer_t *tmr;
int result = 0;
queue = queueptr(queueid);
if (queue == NULL)
return -EINVAL;
tmr = queue->timer;
snd_seq_timer_close(queue);
queuefree(queue);
return result;
}
/* remove cells based on flush criteria */
void snd_seq_queue_remove_cells(int client, struct snd_seq_remove_events *info)
{
int i;
struct snd_seq_queue *q;
for (i = 0; i < SNDRV_SEQ_MAX_QUEUES; i++) {
if ((q = queueptr(i)) == NULL)
continue;
if (test_bit(client, q->clients_bitmap) &&
(! (info->remove_mode & SNDRV_SEQ_REMOVE_DEST) ||
q->queue == info->queue)) {
snd_seq_prioq_remove_events(q->tickq, client, info);
snd_seq_prioq_remove_events(q->timeq, client, info);
}
queuefree(q);
}
}
/* open timer -
* q->use mutex should be down before calling this function to avoid
* confliction with snd_seq_queue_use()
*/
int snd_seq_queue_timer_open(int queueid)
{
int result = 0;
struct snd_seq_queue *queue;
struct snd_seq_timer *tmr;
queue = queueptr(queueid);
if (queue == NULL)
return -EINVAL;
tmr = queue->timer;
if ((result = snd_seq_timer_open(queue)) < 0) {
snd_seq_timer_defaults(tmr);
result = snd_seq_timer_open(queue);
}
queuefree(queue);
return result;
}
/* notification that client has left the system -
* stop the timer on all queues owned by this client
*/
void snd_seq_queue_client_termination(int client)
{
unsigned long flags;
int i;
struct snd_seq_queue *q;
for (i = 0; i < SNDRV_SEQ_MAX_QUEUES; i++) {
if ((q = queueptr(i)) == NULL)
continue;
spin_lock_irqsave(&q->owner_lock, flags);
if (q->owner == client)
q->klocked = 1;
spin_unlock_irqrestore(&q->owner_lock, flags);
if (q->owner == client) {
if (q->timer->running)
snd_seq_timer_stop(q->timer);
snd_seq_timer_reset(q->timer);
}
queuefree(q);
}
}