[alsa-midi] add basic alsa-seq midi slave driver

git-svn-id: svn+ssh://jackaudio.org/trunk/jack@4400 0c269be4-1314-0410-8aa9-9f06e86f4224

drivers/alsa-midi/Makefile.am

@@ -1,5 +1,16 @@
 MAINTAINERCLEANFILES=Makefile.in
 
+AM_CFLAGS = $(JACK_CFLAGS)
+
+plugindir = $(ADDON_DIR)
+
+plugin_LTLIBRARIES = jack_alsa_midi.la
+
+jack_alsa_midi_la_LDFLAGS = -module -avoid-version
+jack_alsa_midi_la_SOURCES = alsa_rawmidi.c alsa_seqmidi.c alsa_midi_driver.c
+
 noinst_HEADERS = alsa_midi.h \
 		 midi_pack.h \
 		 midi_unpack.h
+
+jack_alsa_midi_la_LIBADD = $(ALSA_LIBS) 

drivers/alsa-midi/alsa_midi.h

@@ -20,6 +20,7 @@
 #define __jack_alsa_midi_h__
 
 #include <jack/jack.h>
+#include <jack/driver.h>
 
 typedef struct alsa_midi_t alsa_midi_t;
 struct alsa_midi_t {
@@ -35,4 +36,13 @@ struct alsa_midi_t {
 alsa_midi_t* alsa_rawmidi_new(jack_client_t *jack);
 alsa_midi_t* alsa_seqmidi_new(jack_client_t *jack, const char* alsa_name);
 
+typedef struct _alsa_midi_driver {
+
+    JACK_DRIVER_DECL;
+
+    alsa_midi_t *midi;
+    jack_client_t *client;
+
+} alsa_midi_driver_t;
+
 #endif /* __jack_alsa_midi_h__ */

drivers/alsa-midi/alsa_midi_driver.c

@@ -0,0 +1,122 @@
+
+#include "alsa_midi.h"
+#include <string.h>
+
+static int
+alsa_midi_driver_attach( alsa_midi_driver_t *driver, jack_engine_t *engine )
+{
+	return driver->midi->attach(driver->midi);
+}
+
+static int
+alsa_midi_driver_detach( alsa_midi_driver_t *driver, jack_engine_t *engine )
+{
+	return driver->midi->detach(driver->midi);
+}
+
+static int
+alsa_midi_driver_read( alsa_midi_driver_t *driver, jack_nframes_t nframes )
+{
+	driver->midi->read(driver->midi, nframes);
+	return 0;
+}
+
+static int
+alsa_midi_driver_write( alsa_midi_driver_t *driver, jack_nframes_t nframes )
+{
+	driver->midi->write(driver->midi, nframes);
+	return 0;
+}
+
+static int
+alsa_midi_driver_start( alsa_midi_driver_t *driver )
+{
+	return driver->midi->start(driver->midi);
+}
+
+static int
+alsa_midi_driver_stop( alsa_midi_driver_t *driver )
+{
+	return driver->midi->stop(driver->midi);
+}
+
+static void
+alsa_midi_driver_delete( alsa_midi_driver_t *driver )
+{
+	if (driver->midi)
+		(driver->midi->destroy)(driver->midi);
+
+	free (driver);
+}
+
+static jack_driver_t *
+alsa_midi_driver_new (jack_client_t *client, const char *name)
+{
+	alsa_midi_driver_t *driver;
+
+	jack_info ("creating alsa_midi driver ..."); 
+
+	driver = (alsa_midi_driver_t *) calloc (1, sizeof (alsa_midi_driver_t));
+
+	jack_driver_init ((jack_driver_t *) driver);
+
+	driver->attach = (JackDriverAttachFunction) alsa_midi_driver_attach;
+	driver->detach = (JackDriverDetachFunction) alsa_midi_driver_detach;
+	driver->read = (JackDriverReadFunction) alsa_midi_driver_read;
+	driver->write = (JackDriverWriteFunction) alsa_midi_driver_write;
+	driver->start = (JackDriverStartFunction) alsa_midi_driver_start;
+	driver->stop = (JackDriverStartFunction) alsa_midi_driver_stop;
+
+
+	driver->midi   = alsa_seqmidi_new(client, NULL);
+	driver->client = client;
+
+	return (jack_driver_t *) driver;
+}
+
+/* DRIVER "PLUGIN" INTERFACE */
+
+const char driver_client_name[] = "alsa_midi";
+
+const jack_driver_desc_t *
+driver_get_descriptor ()
+{
+	jack_driver_desc_t * desc;
+	jack_driver_param_desc_t * params;
+	//unsigned int i;
+
+	desc = calloc (1, sizeof (jack_driver_desc_t));
+
+	strcpy (desc->name,"alsa_midi");
+	desc->nparams = 0;
+  
+	params = calloc (desc->nparams, sizeof (jack_driver_param_desc_t));
+
+	desc->params = params;
+
+	return desc;
+}
+
+jack_driver_t *
+driver_initialize (jack_client_t *client, const JSList * params)
+{
+	const JSList * node;
+	const jack_driver_param_t * param;
+
+	for (node = params; node; node = jack_slist_next (node)) {
+  	        param = (const jack_driver_param_t *) node->data;
+
+		switch (param->character) {
+			default:
+				break;
+		}
+	}
+			
+	return alsa_midi_driver_new (client, NULL);
+}
+
+void
+driver_finish (jack_driver_t *driver)
+{
+	alsa_midi_driver_delete ((alsa_midi_driver_t *) driver);
+}