[PATCH] Added rudimentary ALSA support.

From: Johnny Oskarsson <joskar_AT_joskar.se>
Date: Wed, 6 Apr 2016 22:09:17 +0200

Port routing currently needs to be done using external tools, such
as aconnect(1).

---
 Makefile | 10 +++++++---
 alsa.c   | 45 +++++++++++++++++++++++++++++++++++++++++++++
 alsa.h   | 10 ++++++++++
 3 files changed, 62 insertions(+), 3 deletions(-)
 create mode 100644 alsa.c
 create mode 100644 alsa.h
diff --git a/Makefile b/Makefile
index a4a15fd..b8fe4c7 100644
--- a/Makefile
+++ b/Makefile
_AT_@ -2,8 +2,8 @@
 # VERSION = 0
 
 # SOURCE
-SOURCE = main.c sndio.c
-OBJ = main.o sndio.o
+SOURCE = main.c sndio.c alsa.c
+OBJ = main.o
 HDR = midi.h config.h
 
 PREFIX = /usr/local
_AT_@ -15,10 +15,14 @@ XFLAGS = `pkg-config --cflags x11`
 
 SOUNDLIBS = -lsndio
 SOUNDFLAGS = -DSNDIO
+SOUNDOBJ = sndio.o
 # TODO: implement #
 #uncomment for ALSA
-#SOUNDLIBS = -lalsa
+#SOUNDLIBS = -lasound
 #SOUNDFLAGS = -DALSA
+#SOUNDOBJ = alsa.o
+
+OBJ += $(SOUNDOBJ)
 
 LIBS = ${XLIBS} ${SOUNDLIBS}
 CFLAGS = -g -std=c99 -pedantic -Wall -O0 ${XFLAGS} ${SOUNDFLAGS}
diff --git a/alsa.c b/alsa.c
new file mode 100644
index 0000000..48ecc3d
--- /dev/null
+++ b/alsa.c
_AT_@ -0,0 +1,45 @@
+#include <alsa/asoundlib.h>
+
+snd_seq_t *hdl;
+static snd_midi_event_t *mbuf;
+static int midiport;
+
+/* open */
+int
+midiopen(void)
+{
+	snd_midi_event_new(32, &mbuf);
+	if (snd_seq_open(&hdl, "default", SND_SEQ_OPEN_OUTPUT, 0) != 0) {
+		return 1;
+	} else {
+		snd_seq_set_client_name(hdl, "svmidi");
+		if ((midiport = snd_seq_create_simple_port(hdl, "svmidi",
+			    SND_SEQ_PORT_CAP_READ|SND_SEQ_PORT_CAP_SUBS_READ,
+			    SND_SEQ_PORT_TYPE_APPLICATION)) < 0) {
+			return 1;
+		}
+		return 0;
+	}
+}
+
+/* send message */
+void
+_midisend(unsigned char message[], size_t count)
+{
+	snd_seq_event_t ev;
+
+	snd_midi_event_encode(mbuf, message, count, &ev);
+
+	snd_seq_ev_set_subs(&ev);
+	snd_seq_ev_set_direct(&ev);
+	snd_seq_ev_set_source(&ev, midiport);
+	snd_seq_event_output_direct(hdl, &ev);
+}
+
+/* close */
+void
+midiclose(void)
+{
+	snd_midi_event_free(mbuf);
+	snd_seq_close(hdl);
+}
diff --git a/alsa.h b/alsa.h
new file mode 100644
index 0000000..c870308
--- /dev/null
+++ b/alsa.h
_AT_@ -0,0 +1,10 @@
+#include <alsa/asoundlib.h>
+
+/* device */
+extern snd_seq_t *hdl;
+
+/* functions */
+void _midisend(unsigned char [], size_t);
+#define midisend(msg) _midisend(msg, sizeof(msg))
+int midiopen(void);
+void midiclose(void);
-- 
2.4.6
--vGgW1X5XWziG23Ko--

Received on Mon Sep 17 2001 - 00:00:00 CEST