Merge branch 'feature/oss-midi'

1 files changed, 132 insertions, 0 deletions

diff --git a/drumgizmo/input/ossmidi.cc b/drumgizmo/input/ossmidi.cc
new file mode 100644
index 0000000..325a83d
--- /dev/null
+++ b/drumgizmo/input/ossmidi.cc
@@ -0,0 +1,132 @@
+/* -*- Mode: c++ -*- */
+/***************************************************************************
+ *            ossmidi.cc
+ *
+ *  Sun May 21 10:52:09 CEST 2017
+ *  Copyright 2017 Goran Mekić
+ *  meka@tilda.center
+ ****************************************************************************/
+
+/*
+ *  This file is part of DrumGizmo.
+ *
+ *  DrumGizmo is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU Lesser General Public License as published by
+ *  the Free Software Foundation; either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  DrumGizmo 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 Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public License
+ *  along with DrumGizmo; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
+ */
+#include "ossmidi.h"
+#include <sys/soundcard.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <iostream>
+
+
+static int const NOTE_ON = 0x90;
+static int const NOTE_MASK = 0xF0;
+
+
+OSSInputEngine::OSSInputEngine()
+	: AudioInputEngineMidi{}
+	, dev{"/dev/midi"}
+{
+}
+
+
+OSSInputEngine::~OSSInputEngine()
+{
+}
+
+
+bool OSSInputEngine::init(const Instruments& instruments)
+{
+	if(!loadMidiMap(midimap_file, instruments))
+	{
+		std::cerr << "[OSSInputEngine] Failed to parse midimap '"
+		          << midimap_file << std::endl;
+		return false;
+	}
+	if ((fd = open(dev.data(), O_RDONLY | O_NONBLOCK, 0)) == -1)
+	{
+		std::cerr << dev.data() << ' ' << std::strerror(errno) << std::endl;
+		return false;
+	}
+	return true;
+}
+
+
+void OSSInputEngine::setParm(const std::string& parm, const std::string& value)
+{
+	if(parm == "dev")
+	{
+		dev = value;
+	}
+	else if(parm == "midimap")
+	{
+		midimap_file = value;
+	}
+}
+
+
+bool OSSInputEngine::start()
+{
+	return true;
+}
+
+void OSSInputEngine::stop()
+{
+}
+
+
+void OSSInputEngine::pre()
+{
+	events.clear();
+}
+
+
+void OSSInputEngine::run(size_t pos, size_t len, std::vector<event_t>& events)
+{
+	int l;
+	unsigned char buf[128];
+	if ((l = read (fd, buf, sizeof (buf))) != -1)
+	{
+		int masked_note = buf[0] & NOTE_MASK;
+		if (masked_note == NOTE_ON) {
+			int note = buf[1];
+			int velocity = buf[2];
+			event_t event;
+			event.instrument = mmap.lookup(note);
+			if(event.instrument != -1)
+			{
+				event.velocity = velocity / 127.0;
+				event.type = 0;
+				event.offset = 0;
+				events.push_back(event);
+			}
+		}
+	} else if (errno != EAGAIN) {
+		std::cerr << "Error code: " << errno << std::endl;
+		std::cerr << std::strerror(errno) << std::endl;
+	}
+}
+
+
+void OSSInputEngine::post()
+{
+}
+
+
+bool OSSInputEngine::isFreewheeling() const
+{
+	return false;
+}