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authorAndré Nusser <andre.nusser@googlemail.com>2016-01-24 00:47:42 +0100
committerAndré Nusser <andre.nusser@googlemail.com>2016-02-09 11:09:51 +0100
commit0070316e75f149d63eb0c0b00cbd9658bd04d503 (patch)
tree8b7c1738581b08eb67fc65694ba4a9ff3b68bae4
parent9f904b80a83465f945cb66cae4666d663b82c5d7 (diff)
Implement memchecker to ensure a drumkit fits into RAM.
It's a class that can calculate the available free RAM (or rather a rough estimation of it) and the size of the drumkit when loaded into RAM and provides a plugic method to check if the drumkit then fits into RAM.
-rw-r--r--src/Makefile.am.drumgizmo1
-rw-r--r--src/memchecker.cc102
-rw-r--r--src/memchecker.h48
-rw-r--r--vst/Makefile.mingw32.in1
4 files changed, 152 insertions, 0 deletions
diff --git a/src/Makefile.am.drumgizmo b/src/Makefile.am.drumgizmo
index 57b6362..3248702 100644
--- a/src/Makefile.am.drumgizmo
+++ b/src/Makefile.am.drumgizmo
@@ -18,6 +18,7 @@ DRUMGIZMO_SOURCES = \
$(top_srcdir)/src/events.cc \
$(top_srcdir)/src/instrument.cc \
$(top_srcdir)/src/instrumentparser.cc \
+ $(top_srcdir)/src/memchecker.cc \
$(top_srcdir)/src/messagehandler.cc \
$(top_srcdir)/src/messagereceiver.cc \
$(top_srcdir)/src/midimapparser.cc \
diff --git a/src/memchecker.cc b/src/memchecker.cc
new file mode 100644
index 0000000..b26603a
--- /dev/null
+++ b/src/memchecker.cc
@@ -0,0 +1,102 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/***************************************************************************
+ * memchecker.cc
+ *
+ * Sat Jan 16 18:27:52 CET 2016
+ * Copyright 2016 André Nusser
+ * andre.nusser@googlemail.com
+ ****************************************************************************/
+
+/*
+ * 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 "memchecker.h"
+
+#ifdef WIN32
+ #define WIN32_LEAN_AND_MEAN
+ #include <windows.h>
+#else
+ #include <sys/sysinfo.h>
+#endif
+#include <sndfile.h>
+#include <hugin.hpp>
+
+bool Memchecker::enoughFreeMemory(const DrumKit& drumkit) const
+{
+ size_t freeMemory = calcFreeMemory();
+ size_t neededMemory = calcNeededMemory(drumkit);
+
+ return freeMemory >= neededMemory;
+}
+
+size_t Memchecker::calcFreeMemory() const
+{
+ size_t free_memory(0);
+
+ // Platform specific calculation of the amount of free memory.
+#ifdef WIN32
+ MEMORYSTATUSEX status;
+ status.dwLength = sizeof(status);
+ GlobalMemoryStatusEx(&status);
+ free_memory = status.ullAvailPhys;
+#else
+ struct sysinfo sys_info;
+ sysinfo (&sys_info);
+ free_memory = sys_info.freeram * sys_info.mem_unit;
+#endif
+
+ DEBUG(memchecker, "Calculated %llu free memory.\n", (long long unsigned int)free_memory);
+
+ return free_memory;
+}
+
+size_t Memchecker::calcNeededMemory(const DrumKit& drumkit) const
+{
+ size_t needed_memory(0);
+
+ // Calculate memory usage of all instruments of drumkit.
+ for(auto instrument : drumkit.instruments)
+ {
+ const auto& audiofiles = instrument->audiofiles;
+
+ // Calculate memory usage of all audiofiles.
+ for(auto audiofile : audiofiles)
+ {
+ needed_memory += calcBytesPerChannel(audiofile->filename);
+ }
+ }
+
+ DEBUG(memchecker, "Calculated %llu needed memory.\n", (long long unsigned int)needed_memory);
+
+ return needed_memory;
+}
+
+size_t Memchecker::calcBytesPerChannel(const std::string& filename) const
+{
+ SF_INFO sf_info;
+
+ SNDFILE* f = sf_open(filename.c_str(), SFM_READ, &sf_info);
+ if(!f)
+ {
+ ERR(memchecker, "SNDFILE Error (%s): %s\n", filename.c_str(), sf_strerror(f));
+ return 0;
+ }
+
+ sf_close(f);
+
+ return sf_info.frames * sizeof(sample_t);
+}
diff --git a/src/memchecker.h b/src/memchecker.h
new file mode 100644
index 0000000..c3e13c2
--- /dev/null
+++ b/src/memchecker.h
@@ -0,0 +1,48 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/***************************************************************************
+ * memchecker.h
+ *
+ * Sat Jan 16 18:27:52 CET 2016
+ * Copyright 2016 André Nusser
+ * andre.nusser@googlemail.com
+ ****************************************************************************/
+
+/*
+ * 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 "drumkit.h"
+
+#include <string>
+
+class Memchecker
+{
+public:
+ //! Checks if there is enough memory left to load drumkit into RAM.
+ //! \param drumkit The drumkit for which it is checked if there's enough memory left.
+ //! \return True iff there is enough memory left.
+ bool enoughFreeMemory(const DrumKit& drumkit) const;
+
+protected:
+ // Computes how much RAM (in bytes) is left.
+ size_t calcFreeMemory() const;
+ // Computes how much memory the drumkit takes when loaded into RAM (in bytes).
+ size_t calcNeededMemory(const DrumKit& drumkit) const;
+ // Computes the number of bytes per channel of <filename> using libsnd.
+ size_t calcBytesPerChannel(const std::string& filename) const;
+};
diff --git a/vst/Makefile.mingw32.in b/vst/Makefile.mingw32.in
index 1caf926..bf0e7f4 100644
--- a/vst/Makefile.mingw32.in
+++ b/vst/Makefile.mingw32.in
@@ -26,6 +26,7 @@ DG_SRC = \
@top_srcdir@/src/events.cc \
@top_srcdir@/src/instrument.cc \
@top_srcdir@/src/instrumentparser.cc \
+ @top_srcdir@/src/memchecker.cc \
@top_srcdir@/src/messagehandler.cc \
@top_srcdir@/src/messagereceiver.cc \
@top_srcdir@/src/midimapparser.cc \