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engines/scumm/imuse_digi/dimuse_utils.cpp

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+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * 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 3 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, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "scumm/imuse_digi/dimuse_engine.h"
+
+namespace Scumm {
+
+int IMuseDigital::addTrackToList(IMuseDigiTrack **listPtr, IMuseDigiTrack *listPtr_Item) {
+	Common::StackLock lock(*_mutex);
+
+	// [0] is ->prev, [1] is ->next
+	if (!listPtr_Item || listPtr_Item->prev || listPtr_Item->next) {
+		debug(5, "IMuseDigital::addTrackToList(): ERROR: arguments might be null");
+		return -5;
+	} else {
+		// Set item's next element to the list
+		listPtr_Item->next = *listPtr;
+
+		if (*listPtr) {
+			// If the list is empty, use this item as the list
+			(*listPtr)->prev = listPtr_Item;
+		}
+
+		// Set the previous element of the item as nullptr,
+		// effectively making the item the first element of the list
+		listPtr_Item->prev = nullptr;
+
+		// Update the list with the new data
+		*listPtr = listPtr_Item;
+
+	}
+	return 0;
+}
+
+int IMuseDigital::removeTrackFromList(IMuseDigiTrack **listPtr, IMuseDigiTrack *listPtr_Item) {
+	Common::StackLock lock(*_mutex);
+
+	IMuseDigiTrack *currentTrack = *listPtr;
+	IMuseDigiTrack *nextTrack;
+	if (listPtr_Item && currentTrack) {
+		do {
+			if (currentTrack == listPtr_Item)
+				break;
+			currentTrack = currentTrack->next;
+		} while (currentTrack);
+
+		if (currentTrack) {
+			nextTrack = listPtr_Item->next;
+
+			if (nextTrack)
+				nextTrack->prev = listPtr_Item->prev;
+
+			if (listPtr_Item->prev) {
+				listPtr_Item->prev->next = listPtr_Item->next;
+			} else {
+				*listPtr = listPtr_Item->next;
+			}
+
+			listPtr_Item->prev = nullptr;
+			listPtr_Item->next = nullptr;
+			return 0;
+		} else {
+			debug(5, "IMuseDigital::removeTrackFromList(): ERROR: item not on list");
+			return -3;
+		}
+	} else {
+		debug(5, "IMuseDigital::removeTrackFromList(): ERROR: arguments might be null");
+		return -5;
+	}
+}
+
+int IMuseDigital::addStreamZoneToList(IMuseDigiStreamZone **listPtr, IMuseDigiStreamZone *listPtr_Item) {
+	if (!listPtr_Item || listPtr_Item->prev || listPtr_Item->next) {
+		debug(5, "IMuseDigital::addStreamZoneToList(): ERROR: arguments might be null");
+		return -5;
+	} else {
+		// Set item's next element to the list
+		listPtr_Item->next = *listPtr;
+
+		if (*listPtr) {
+			// If the list is empty, use this item as the list
+			(*listPtr)->prev = listPtr_Item;
+		}
+
+		// Set the previous element of the item as nullptr,
+		// effectively making the item the first element of the list
+		listPtr_Item->prev = nullptr;
+
+		// Update the list with the new data
+		*listPtr = listPtr_Item;
+
+	}
+	return 0;
+}
+
+int IMuseDigital::removeStreamZoneFromList(IMuseDigiStreamZone **listPtr, IMuseDigiStreamZone *listPtr_Item) {
+	IMuseDigiStreamZone *currentStrZone = *listPtr;
+	IMuseDigiStreamZone *nextStrZone;
+	if (listPtr_Item && currentStrZone) {
+		do {
+			if (currentStrZone == listPtr_Item)
+				break;
+			currentStrZone = currentStrZone->next;
+		} while (currentStrZone);
+
+		if (currentStrZone) {
+			nextStrZone = listPtr_Item->next;
+
+			if (nextStrZone)
+				nextStrZone->prev = listPtr_Item->prev;
+
+			if (listPtr_Item->prev) {
+				listPtr_Item->prev->next = listPtr_Item->next;
+			} else {
+				*listPtr = listPtr_Item->next;
+			}
+
+			listPtr_Item->prev = nullptr;
+			listPtr_Item->next = nullptr;
+			return 0;
+		} else {
+			debug(5, "IMuseDigital::removeStreamZoneFromList(): ERROR: item not on list");
+			return -3;
+		}
+	} else {
+		debug(5, "IMuseDigital::removeStreamZoneFromList(): ERROR: arguments might be null");
+		return -5;
+	}
+}
+
+int IMuseDigital::clampNumber(int value, int minValue, int maxValue) {
+	if (value < minValue)
+		return minValue;
+
+	if (value > maxValue)
+		return maxValue;
+
+	return value;
+}
+
+int IMuseDigital::clampTuning(int value, int minValue, int maxValue) {
+	if (minValue > value) {
+		value += (12 * ((minValue - value) + 11) / 12);
+	}
+
+	if (maxValue < value) {
+		value -= (12 * ((value - maxValue) + 11) / 12);
+	}
+
+	return value;
+}
+
+int IMuseDigital::checkHookId(int &trackHookId, int sampleHookId) {
+	if (sampleHookId) {
+		if (trackHookId == sampleHookId) {
+			trackHookId = 0;
+			return 0;
+		} else {
+			return -1;
+		}
+	} else if (trackHookId == 128) {
+		trackHookId = 0;
+		return -1;
+	} else {
+		return 0;
+	}
+}
+
+} // End of namespace Scumm