From 88cc4f41efcca827c22aab09e83efe729c89bc9b Mon Sep 17 00:00:00 2001
From: Bent Bisballe Nyeng <deva@aasimon.org>
Date: Fri, 10 Apr 2015 10:40:47 +0200
Subject: Initial design of cache manager.
---
src/cachemanager.cc | 28 ++++++++++++++++++
src/cachemanager.h | 84 +++++++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 112 insertions(+)
create mode 100644 src/cachemanager.cc
create mode 100644 src/cachemanager.h
diff --git a/src/cachemanager.cc b/src/cachemanager.cc
new file mode 100644
index 0000000..2e9eab9
--- /dev/null
+++ b/src/cachemanager.cc
@@ -0,0 +1,28 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/***************************************************************************
+ * cachemanager.cc
+ *
+ * Fri Apr 10 10:39:24 CEST 2015
+ * Copyright 2015 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.
+ */
+#include "cachemanager.h"
+
diff --git a/src/cachemanager.h b/src/cachemanager.h
new file mode 100644
index 0000000..ed89d12
--- /dev/null
+++ b/src/cachemanager.h
@@ -0,0 +1,84 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/***************************************************************************
+ * cachemanager.h
+ *
+ * Fri Apr 10 10:39:24 CEST 2015
+ * Copyright 2015 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.
+ */
+#ifndef __DRUMGIZMO_CACHEMANAGER_H__
+#define __DRUMGIZMO_CACHEMANAGER_H__
+
+#include <string>
+#include <list>
+
+class AudioFile;
+
+class CacheManager {
+public:
+
+ class Request {
+ public:
+ std::string filename;
+ std::map<unsigned int, void*> targets;
+ size_t pos;
+ };
+
+ // Pre: preloaded contains 2 x framesize. chunk size is framesize.
+ // allocate 2 chunks and copy initial_samples_needed to first buffer from
+ // preloaded data and enough to fill up the second buffer from preloaded
+ // returns the first buffer and its size in &size.
+ // get id from "free stack" and store pointers to buffers in id vector.
+ // event: open sndfile handle (if not already open) and increase refcount
+ sample_t *hello(AudioFile *file, int initial_samples_needed, int channel, id_t &new_id);
+
+ // Return which ever buffer is the front, swap them and add event to load the
+ // next chunk.
+ sample_t *getNextBuffer(id_t id, size_t &size);
+
+ // decrement file handle refcounter and close file if it is 0.
+ // free the 2 buffers
+ // (do not erase from the id vector), push index to
+ // "free stack" for reuse.
+ void goodbye(id_t id);
+
+ // id vector:
+ // {
+ // AudioFile*
+ // channel
+ // buffer1, buffer2
+ // position
+ // (ready?)
+ // }
+
+private:
+ class File {
+ public:
+ sndfile_t *handle;
+ int refcounter;
+ };
+
+ std::list<Request> requests;
+ std::map<AudioFile *, File>
+
+};
+
+#endif/*__DRUMGIZMO_CACHEMANAGER_H__*/
--
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