prepare for patchbay effects

src/engine/effect/abstract.cpp

@@ -0,0 +1,85 @@
+/**
+ * Furnace Tracker - multi-system chiptune tracker
+ * Copyright (C) 2021-2023 tildearrow and contributors
+ *
+ * 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.
+ */
+
+#include "../effect.h"
+#include "../../ta-log.h"
+#include <stdexcept>
+
+void DivEffect::acquire(float** in, float** out, size_t len) {
+}
+
+void DivEffect::reset() {
+}
+
+int DivEffect::getInputCount() {
+  return 0;
+}
+
+int DivEffect::getOutputCount() {
+  return 0;
+}
+
+void DivEffect::rateChanged(double rate) {
+}
+
+String DivEffect::getParam(size_t param) {
+  throw std::out_of_range("param");
+
+  // unreachable
+  return "";
+}
+
+bool DivEffect::setParam(size_t param, String value) {
+  return false;
+}
+
+const char* DivEffect::getParams() {
+  return NULL;
+}
+
+size_t DivEffect::getParamCount() {
+  return 0;
+}
+
+String DivEffect::getDynamicText(size_t id) {
+  throw std::out_of_range("param");
+
+  // unreachable
+  return "";
+}
+
+bool DivEffect::load(unsigned short version, const unsigned char* data, size_t len) {
+  return false;
+}
+
+unsigned char* DivEffect::save(unsigned short* version, size_t* len) {
+  *len=0;
+  *version=0;
+  return NULL;
+}
+
+bool DivEffect::init(DivEngine* parent, double rate, unsigned short version, const unsigned char* data, size_t len) {
+  return false;
+}
+
+void DivEffect::quit() {
+}
+
+DivEffect::~DivEffect() {
+}

src/engine/effect/dummy.cpp

@@ -0,0 +1,60 @@
+/**
+ * Furnace Tracker - multi-system chiptune tracker
+ * Copyright (C) 2021-2023 tildearrow and contributors
+ *
+ * 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.
+ */
+
+#include "dummy.h"
+
+void DivEffectDummy::acquire(float** in, float** out, size_t len) {
+  memcpy(out[0],in[0],len*sizeof(float));
+}
+
+void DivEffectDummy::reset() {
+}
+
+int DivEffectDummy::getInputCount() {
+  return 1;
+}
+
+int DivEffectDummy::getOutputCount() {
+  return 1;
+}
+
+const char* DivEffectDummy::getParams() {
+  return NULL;
+}
+
+size_t DivEffectDummy::getParamCount() {
+  return 0;
+}
+
+bool DivEffectDummy::load(unsigned short version, const unsigned char* data, size_t len) {
+  return true;
+}
+
+unsigned char* DivEffectDummy::save(unsigned short* version, size_t* len) {
+  *len=0;
+  *version=0;
+  return NULL;
+}
+
+bool DivEffectDummy::init(DivEngine* parent, double rate, unsigned short version, const unsigned char* data, size_t len) {
+  return false;
+}
+
+void DivEffectDummy::quit() {
+}

src/engine/effect/dummy.h

@@ -0,0 +1,34 @@
+/**
+ * Furnace Tracker - multi-system chiptune tracker
+ * Copyright (C) 2021-2023 tildearrow and contributors
+ *
+ * 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.
+ */
+
+#include "../effect.h"
+
+class DivEffectDummy: public DivEffect {
+  public:
+    void acquire(float** in, float** out, size_t len);
+    void reset();
+    int getInputCount();
+    int getOutputCount();
+    const char* getParams();
+    size_t getParamCount();
+    bool load(unsigned short version, const unsigned char* data, size_t len);
+    unsigned char* save(unsigned short* version, size_t* len);
+    bool init(DivEngine* parent, double rate, unsigned short version, const unsigned char* data, size_t len);
+    void quit();
+};