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/* hexter DSSI software synthesizer GUI
*
* Copyright (C) 2004, 2009 Sean Bolton and others.
*
* Portions of this file may have come from specimen, copyright
* (c) 2004 Pete Bessman under the GNU General Public License
* version 2.
*
* 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., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301 USA.
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#ifdef MIDI_ALSA
#include <alsa/asoundlib.h>
#include <gtk/gtk.h>
#include "gui_main.h"
#include "gui_midi.h"
int sysex_enabled = 0;
snd_seq_t *sysex_seq_handle;
int sysex_seq_client_id;
int sysex_seq_port_id;
gint sysex_seq_gtk_fd_tag;
sysex_callback_function *sysex_handler_callback;
void
sysex_receive_callback(gpointer data, gint source,
GdkInputCondition condition)
{
snd_seq_event_t *ev;
do {
if (snd_seq_event_input(sysex_seq_handle, &ev) <= 0)
continue;
if (ev->type == SND_SEQ_EVENT_SYSEX) {
(*sysex_handler_callback)(ev->data.ext.len, ev->data.ext.ptr);
}
snd_seq_free_event(ev);
} while (snd_seq_event_input_pending(sysex_seq_handle, 0) > 0);
}
int
sysex_start(sysex_callback_function *handler, char **errmsg)
{
char buf[33];
int npfd;
struct pollfd pfd;
if (snd_seq_open(&sysex_seq_handle, "default", SND_SEQ_OPEN_INPUT,
SND_SEQ_NONBLOCK) < 0) {
*errmsg = "Error opening ALSA sequencer.\n";
return 0;
}
snprintf(buf, 33, "hexter %s", user_friendly_id);
snd_seq_set_client_name(sysex_seq_handle, buf);
sysex_seq_client_id = snd_seq_client_id(sysex_seq_handle);
if ((sysex_seq_port_id = snd_seq_create_simple_port(sysex_seq_handle,
"sys-ex receive",
SND_SEQ_PORT_CAP_WRITE|SND_SEQ_PORT_CAP_SUBS_WRITE,
SND_SEQ_PORT_TYPE_APPLICATION)) < 0) {
*errmsg = "Error creating sequencer port.\n";
snd_seq_close(sysex_seq_handle);
return 0;
}
sysex_handler_callback = handler;
/* tell GTK+ to watch seq fd */
npfd = snd_seq_poll_descriptors_count(sysex_seq_handle, POLLIN);
if (npfd != 1) {
*errmsg = "Incompatible ALSA version.\n";
snd_seq_close(sysex_seq_handle);
return 0;
}
snd_seq_poll_descriptors(sysex_seq_handle, &pfd, npfd, POLLIN);
sysex_seq_gtk_fd_tag = gdk_input_add(pfd.fd, GDK_INPUT_READ,
sysex_receive_callback, NULL);
sysex_enabled = 1;
return 1;
}
void
sysex_stop(void)
{
gdk_input_remove(sysex_seq_gtk_fd_tag);
snd_seq_delete_simple_port (sysex_seq_handle, sysex_seq_port_id);
snd_seq_close(sysex_seq_handle);
sysex_enabled = 0;
}
#else /* MIDI_ALSA */
#include "gui_main.h"
#include "gui_midi.h"
int sysex_enabled = 0;
int
sysex_start(sysex_callback_function *handler, char **errmsg)
{
*errmsg = "MIDI sys-ex support not available!\n";
sysex_enabled = 0;
return 0;
}
void
sysex_stop(void)
{
sysex_enabled = 0;
}
#endif /* MIDI_ALSA */
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