Hi,
First of all I would like to thank you for this! I use VMPK quite
a lot and it is nice to see a "simpler" alternative without all the
dependencies.
> The biggest missing feature is ALSA support, which I can't do
> since I have no linux box, but might be extremely simple task.
> Once the support is added, the software can be quite useful, in
> such a small piece of code.
I added basic support for ALSA, which works on my machine at least. See
attached patch.
(fair warning: I haven't used the ALSA sequencer API before)
There seems to be some BSD-specific things in your code (u_char, for
instance) which I had to change to make svmidi compile, but I haven't
included this in the patch since it would distract from the ALSA
support itself.
Cheers,
Johnny
>From 4f341bd11a76d8b92fcc954ba0e072af2b0e62d4 Mon Sep 17 00:00:00 2001
From: Johnny Oskarsson <jos...@joskar.se>
Date: Wed, 6 Apr 2016 22:09:17 +0200
Subject: [PATCH] Added rudimentary ALSA support.
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
@@ -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
@@ -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
@@ -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
@@ -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
