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+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/***************************************************************************
+ * audiocacheidmanager.h
+ *
+ * Tue Jan 5 10:59:37 CET 2016
+ * Copyright 2016 Bent Bisballe Nyeng
+ * deva@aasimon.org
+ ****************************************************************************/
+
+/*
+ * This file is part of DrumGizmo.
+ *
+ * DrumGizmo 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.
+ *
+ * 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU 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 <stdlib.h>
+
+#include <vector>
+
+#include <audiotypes.h>
+
+#include <mutex>
+
+class AudioCacheFile;
+
+#define CACHE_DUMMYID -2
+#define CACHE_NOID -1
+
+typedef int cacheid_t;
+
+typedef struct {
+ cacheid_t id{CACHE_NOID}; //< Current id of this cache_t. CACHE_NOID means not in use.
+
+ AudioCacheFile* afile{nullptr};
+ size_t channel{0};
+ size_t pos{0}; //< File position
+ volatile bool ready{false};
+ sample_t* front{nullptr};
+ sample_t* back{nullptr};
+ size_t localpos{0}; //< Intra buffer (front) position.
+
+ sample_t* preloaded_samples{nullptr}; // nullptr means preload buffer not active.
+ size_t preloaded_samples_size{0};
+} cache_t;
+
+class AudioCacheIDManager {
+ friend class AudioCacheEventHandler;
+public:
+ AudioCacheIDManager();
+ ~AudioCacheIDManager();
+
+ void init(unsigned int capacity);
+
+ // #thread safe
+ // #hard real-time safe
+ cache_t& getCache(cacheid_t id);
+
+ // Thread safe
+ // Real-time safe
+ cacheid_t registerID(const cache_t& cache);
+
+ // Thread safe
+ // Real-time safe
+ void releaseID(cacheid_t id);
+
+protected:
+ // For AudioCacheEventHandler
+ void disableActive();
+ std::vector<cacheid_t> getActiveIDs();
+
+ std::mutex mutex;
+
+ std::vector<cache_t> id2cache;
+ std::vector<cacheid_t> availableids;
+};