initial import

1 files changed, 64 insertions, 0 deletions

diff --git a/midialsa.cpp b/midialsa.cpp
new file mode 100644
index 0000000..e8e653a
--- /dev/null
+++ b/midialsa.cpp
@@ -0,0 +1,64 @@
+/*
+ * Copyright (C) 2022 Javier S. Pedro
+ *
+ * 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.
+ */
+
+#define LOG_ENABLED 1
+#define LOG_ENABLE_FLOW 1
+#define LOG_GROUP LOG_GROUP_DEV_SB16
+
+#include <VBox/err.h>
+#include <VBox/log.h>
+#include <alsa/asoundlib.h>
+#include "midialsa.h"
+
+MIDIOutAlsa::MIDIOutAlsa() : _out(NULL)
+{
+
+}
+
+MIDIOutAlsa::~MIDIOutAlsa()
+{
+}
+
+int MIDIOutAlsa::open(const char *dev)
+{
+	int err;
+
+    if ((err = snd_rawmidi_open(NULL, &_out, "virtual", SND_RAWMIDI_NONBLOCK))) {
+        LogWarn(("ALSA rawmidi open error: %s\n", snd_strerror(err)));
+        return VERR_AUDIO_STREAM_COULD_NOT_CREATE;
+    }
+
+    // TODO: Connect somewhere
+    NOREF(dev);
+
+	return VINF_SUCCESS;
+}
+
+int MIDIOutAlsa::close()
+{
+    if (_out) {
+        snd_rawmidi_close(_out);
+        _out = NULL;
+    }
+	return VINF_SUCCESS;
+}
+
+ssize_t MIDIOutAlsa::write(uint8_t *data, size_t len)
+{
+    return snd_rawmidi_write(_out, data, len);
+}