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authorGoran Mekić <meka@tilda.center>2017-12-30 15:55:53 +0100
committerGoran Mekić <meka@tilda.center>2017-12-30 15:55:53 +0100
commiteb10ac5e8abd41c386d05e555406ec92a54f0164 (patch)
tree70cd659a85d49679debf49fe7da25ffa5908234a /drumgizmo/input/ossmidi.cc
parent992750a805d21de4ffcf7f4382fea8aa1f58c3b7 (diff)
parent74f18e24e100b487184e3dd7a57fe1609f645654 (diff)
Merge branch 'feature/oss-midi'
Diffstat (limited to 'drumgizmo/input/ossmidi.cc')
-rw-r--r--drumgizmo/input/ossmidi.cc132
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;
+}