'Clock' node to generate pulses in BPM units.

noisicaa/node_lib/clock/__init__.py

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+# @begin:license
+#
+# Copyright (c) 2015-2019, Benjamin Niemann <pink@odahoda.de>
+#
+# 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.
+#
+# @end:license

noisicaa/node_lib/clock/audio.cpp

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+/*
+ * @begin:license
+ *
+ * Copyright (c) 2015-2021, Ben Niemann <pink@odahoda.de>
+ *
+ * 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.
+ *
+ * @end:license
+ */
+
+#include <cmath>
+#include <string>
+#include <vector>
+
+#include <flatbuffers/flatbuffers.h>
+
+#include "noisicaa/core/flatbuffers.h"
+#include "noisicaa/engine/engine_impl.h"
+#include "noisicaa/engine/buffers.h"
+#include "noisicaa/engine/block_context.h"
+#include "noisicaa/engine/node_db.h"
+#include "noisicaa/node_lib/clock/audio.h"
+#include "noisicaa/node_lib/clock/node_message_generated.h"
+
+namespace noisicaa::engine::clock {
+
+Node::Node(EngineImpl* engine, uint64_t id)
+  : ProcessorNode(engine, id, "noisicaa.node_lib.clock") {}
+
+Status Node::run(BlockContext* ctxt, const std::vector<Buffer*>* buffers) {
+  float bpm = ((float*)buffers->at(0)->data())[0];
+  float* out = (float*)buffers->at(1)->data();
+
+  uint32_t next_click = _engine->sample_rate() / (std::max(1.0f, std::min(bpm, 1000.0f)) / 60.0);
+  for (uint32_t smpl = 0 ; smpl < ctxt->block_size ; ++smpl) {
+    if (_counter >= next_click) {
+      *out++ = 1.0;
+      _counter = 0;
+
+      FlatBufferAllocator allocator;
+      flatbuffers::FlatBufferBuilder fbs(allocator.buf_size, &allocator);
+
+      NodeMessageBuilder msg_builder(fbs);
+      fbs.Finish(msg_builder.Finish());
+
+      push_node_message(ctxt, fbs.GetBufferPointer(), fbs.GetSize());
+    } else {
+      *out++ = 0.0;
+      ++_counter;
+    }
+  }
+
+  return Status::Ok();
+}
+
+NOISICAA_REGISTER_NODE_CLASS(Node, "node://clock")
+
+}  // namespace noisicaa::engine::clock
+

noisicaa/node_lib/clock/audio.h

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+// -*- mode: c++ -*-
+
+/*
+ * @begin:license
+ *
+ * Copyright (c) 2015-2021, Ben Niemann <pink@odahoda.de>
+ *
+ * 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.
+ *
+ * @end:license
+ */
+
+#ifndef _NOISICAA_NODE_LIB_CLOCK_H
+#define _NOISICAA_NODE_LIB_CLOCK_H
+
+#include <memory>
+#include <vector>
+
+#include "noisicaa/core/status.h"
+#include "noisicaa/engine/processor_node.h"
+
+namespace noisicaa::engine {
+
+class EngineImpl;
+class Program;
+
+namespace clock {
+
+class Node : public ProcessorNode {
+public:
+  Node(EngineImpl* engine, uint64_t id);
+
+  Status run(BlockContext* ctxt, const std::vector<Buffer*>* buffers) override;
+
+private:
+  uint32_t _counter = 0x7fffffff;
+};
+
+}  // namespace clocl
+}  // namespace noisicaa::engine
+
+#endif

noisicaa/node_lib/clock/description.yaml

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+uri: builtin://clock
+audio_class_uri: node://clock
+display_name: Clock
+ui:
+    uri: builtin://clock
+    body_qml: noisicaa/node_lib/clock/ui.qml
+ports:
+- name: bpm
+  direction: INPUT
+  type: CONTROL
+  float_value:
+      default: 120.0
+      min: 1.0
+      max: 1000.0
+- name: out
+  direction: OUTPUT
+  type: AUDIO

noisicaa/node_lib/clock/model.py

@@ -0,0 +1,33 @@
+# @begin:license
+#
+# Copyright (c) 2015-2019, Benjamin Niemann <pink@odahoda.de>
+#
+# 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.
+#
+# @end:license
+
+import logging
+
+from noisicaa import model
+
+logger = logging.getLogger(__name__)
+
+
+class Node(model.GraphNode):
+    pass
+
+
+URI = 'builtin://clock'
+CLASS = Node

noisicaa/node_lib/clock/node_message.fbs

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+// @begin:license
+//
+// Copyright (c) 2015-2021, Ben Niemann <pink@odahoda.de>
+//
+// 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.
+//
+// @end:license
+
+namespace noisicaa.engine.clock;
+
+table NodeMessage {
+  // The message itself means that that click was produced, so no content is needed.
+}
+
+root_type NodeMessage;

noisicaa/node_lib/clock/ui.py

@@ -0,0 +1,45 @@
+# @begin:license
+#
+# Copyright (c) 2015-2019, Benjamin Niemann <pink@odahoda.de>
+#
+# 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.
+#
+# @end:license
+
+import logging
+from typing import Any
+
+from PySide2 import QtCore
+
+from noisicaa.ui.GraphNode import GraphNode
+
+logger = logging.getLogger(__name__)
+
+
+class Node(GraphNode):
+    click = QtCore.Signal()
+
+    def __init__(self, **kwargs: Any) -> None:
+        super().__init__(**kwargs)
+
+        self.setNodeMessageHandler(self.__handleNodeMessage)
+
+    def __handleNodeMessage(self, msg_serialized_unused: bytes) -> None:
+        # Don't care what the messasge it, because it just means 'click'.
+        self.click.emit()
+
+
+URI = 'builtin://clock'
+CLASS = Node

noisicaa/node_lib/clock/ui.qml

@@ -0,0 +1,72 @@
+/*
+ * @begin:license
+ *
+ * Copyright (c) 2015-2019, Benjamin Niemann <pink@odahoda.de>
+ *
+ * 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.
+ *
+ * @end:license
+ */
+
+import QtQuick 2.12
+import QtQuick.Controls 2.15
+import QtQuick.Layouts 1.15
+
+ColumnLayout {
+    property QtObject d
+    anchors.centerIn: parent
+
+    Rectangle {
+        Layout.fillWidth: true
+        Layout.preferredHeight: 32
+
+        color: "#000000"
+
+        ColorAnimation on color {
+            id: clickAnimation;
+            from: "#FF0000"
+            to: "#000000"
+            duration: 200
+        }
+    }
+
+    RowLayout {
+        Layout.alignment: Qt.AlignHCenter
+        Label {
+            text: "BPM"
+        }
+        TextInput {
+            id: bpmInput
+            Layout.preferredWidth: 80
+
+            property var p: d.ports[0]
+            enabled: p.numConnections == 0
+            text: "%1".arg(p.port.controlValue)
+            validator: RegExpValidator { regExp : /[.0-9]{0,7}/ }
+            onEditingFinished: function() {
+                text = Math.max(1.0, Math.min(parseFloat(text), 1000.0));
+            }
+            onTextEdited: function() {
+                if (text) {
+                    p.setControlValue(parseFloat(text));
+                }
+            }
+        }
+    }
+
+    Component.onCompleted: function() {
+        d.click.connect(clickAnimation.restart);
+    }
+}

noisicaa/node_lib/clock/wscript

@@ -0,0 +1,28 @@
+# @begin:license
+#
+# Copyright (c) 2015-2021, Ben Niemann <pink@odahoda.de>
+#
+# 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.
+#
+# @end:license
+
+def build(ctx):
+    ctx.noise_node(
+        has_audio=True,
+        has_model=True,
+        has_ui=True,
+        has_qml=True,
+        has_node_message=True,
+    )