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authorVolker Fischer <corrados>2021-02-02 19:14:09 +0100
committerBent Bisballe Nyeng <deva@aasimon.org>2021-02-02 19:14:37 +0100
commit172cc05cb1f3d2b69b15cfe94c792e042a41b274 (patch)
tree45b24202bc4d73422f8e02e3669c1768a7b4d7bb /drumgizmo/input
parent10ed9e59b8b9aee402547d1261463e00872e03d8 (diff)
Add alsamidi iput engine.
Diffstat (limited to 'drumgizmo/input')
-rw-r--r--drumgizmo/input/alsamidi.cc111
-rw-r--r--drumgizmo/input/alsamidi.h57
2 files changed, 168 insertions, 0 deletions
diff --git a/drumgizmo/input/alsamidi.cc b/drumgizmo/input/alsamidi.cc
new file mode 100644
index 0000000..3547563
--- /dev/null
+++ b/drumgizmo/input/alsamidi.cc
@@ -0,0 +1,111 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/***************************************************************************
+ * alsamidi.cc
+ *
+ * Copyright 2021 corrados
+ ****************************************************************************/
+
+/*
+ * 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 <iostream>
+#include <cassert>
+
+#include "cpp11fix.h" // required for c++11
+#include "alsamidi.h"
+
+AlsaMidiInputEngine::AlsaMidiInputEngine()
+ : AudioInputEngineMidi{}
+ , in_port(0)
+ , seq_handle{nullptr}
+ , pos{0u}
+ , events{}
+{
+}
+
+AlsaMidiInputEngine::~AlsaMidiInputEngine()
+{
+}
+
+bool AlsaMidiInputEngine::init(const Instruments& instruments)
+{
+ if(!loadMidiMap(midimap_file, instruments))
+ {
+ std::cerr << "[MidifileInputEngine] Failed to parse midimap '"
+ << midimap_file << "'\n";
+ return false;
+ }
+
+ snd_seq_open(&seq_handle, "default", SND_SEQ_OPEN_INPUT, 0);
+
+ snd_seq_set_client_name(seq_handle, "Midi Listener");
+
+ in_port =
+ snd_seq_create_simple_port(seq_handle, "listen:in",
+ SND_SEQ_PORT_CAP_WRITE |
+ SND_SEQ_PORT_CAP_SUBS_WRITE,
+ SND_SEQ_PORT_TYPE_APPLICATION);
+
+ return true;
+}
+
+void AlsaMidiInputEngine::setParm(const std::string& parm, const std::string& value)
+{
+ if(parm == "midimap")
+ {
+ // apply midimap filename
+ midimap_file = value;
+ }
+ else
+ {
+ std::cerr << "[AlsaMidiInputEngine] Unsupported parameter '" << parm
+ << "'\n";
+ }
+}
+
+bool AlsaMidiInputEngine::start()
+{
+ return true;
+}
+
+void AlsaMidiInputEngine::stop()
+{
+}
+
+void AlsaMidiInputEngine::pre()
+{
+}
+
+void AlsaMidiInputEngine::run(size_t pos, size_t len,
+ std::vector<event_t>& events)
+{
+ assert(events.empty());
+
+ snd_seq_event_t* ev = nullptr;
+ snd_seq_event_input(seq_handle, &ev);
+
+ processNote(ev->data.raw8.d, 12, ev->data.time.tick, events);
+}
+
+void AlsaMidiInputEngine::post()
+{
+}
+
+bool AlsaMidiInputEngine::isFreewheeling() const
+{
+ return true;
+}
diff --git a/drumgizmo/input/alsamidi.h b/drumgizmo/input/alsamidi.h
new file mode 100644
index 0000000..64d207b
--- /dev/null
+++ b/drumgizmo/input/alsamidi.h
@@ -0,0 +1,57 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/***************************************************************************
+ * alsamidi.h
+ *
+ * Copyright 2021 corrados
+ ****************************************************************************/
+
+/*
+ * 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.
+ */
+#pragma once
+#include <memory>
+#include <alsa/asoundlib.h>
+
+#include "audioinputenginemidi.h"
+#include "midimapper.h"
+#include "midimapparser.h"
+
+class AlsaMidiInputEngine
+ : public AudioInputEngineMidi
+{
+public:
+ AlsaMidiInputEngine();
+ ~AlsaMidiInputEngine();
+
+ // based on AudioInputEngineMidi
+ bool init(const Instruments& instruments) override;
+ void setParm(const std::string& parm, const std::string& value) override;
+ bool start() override;
+ void stop() override;
+ void pre() override;
+ void run(size_t pos, size_t len, std::vector<event_t>& events) override;
+ void post() override;
+ bool isFreewheeling() const override;
+
+private:
+ int in_port;
+ snd_seq_t* seq_handle;
+
+ std::string midimap_file;
+ std::size_t pos;
+ std::vector<event_t> events;
+};