1 files changed, 93 insertions, 0 deletions
diff --git a/src/audiocacheidmanager.h b/src/audiocacheidmanager.h
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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>
+#include "mutex.h"
+
+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() = default;
+	~AudioCacheIDManager();
+
+	//! Initialise id lists with specified capacity.
+	//! Exceeding this capacity will result in CACHE_DUMMYID on calls to
+	//! registerID.
+	void init(unsigned int capacity);
+
+	//! Get the cache object connected with the specified cacheid.
+	//! Note: The cacheid MUST be active.
+	cache_t& getCache(cacheid_t id);
+
+	//! Reserve a new cache object and return its cacheid.
+	//! The contents of the supplied cache object will be copied to the new
+	//! cache object.
+	cacheid_t registerID(const cache_t& cache);
+
+	//! Release a cache object and its correseponding cacheid.
+	//! After this call the cacheid can no longer be used.
+	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;
+};