comparison bits/CountingPluginHandleMapper.h @ 40:55d69b26d4db

Pull out CountingPluginHandleMapper; consts

+/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
+
+/*
+    Vampipe
+
+    Centre for Digital Music, Queen Mary, University of London.
+    Copyright 2006-2016 Chris Cannam and QMUL.
+  
+    Permission is hereby granted, free of charge, to any person
+    obtaining a copy of this software and associated documentation
+    files (the "Software"), to deal in the Software without
+    restriction, including without limitation the rights to use, copy,
+    modify, merge, publish, distribute, sublicense, and/or sell copies
+    of the Software, and to permit persons to whom the Software is
+    furnished to do so, subject to the following conditions:
+
+    The above copyright notice and this permission notice shall be
+    included in all copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+    EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+    NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
+    ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
+    CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+    WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+    Except as contained in this notice, the names of the Centre for
+    Digital Music; Queen Mary, University of London; and Chris Cannam
+    shall not be used in advertising or otherwise to promote the sale,
+    use or other dealings in this Software without prior written
+    authorization.
+*/
+
+#ifndef VAMPIPE_COUNTING_PLUGIN_HANDLE_MAPPER_H
+#define VAMPIPE_COUNTING_PLUGIN_HANDLE_MAPPER_H
+
+#include "PluginHandleMapper.h"
+
+#include <set>
+#include <map>
+
+namespace vampipe {
+
+//!!! NB not thread-safe at present, should it be?
+class CountingPluginHandleMapper : public PluginHandleMapper
+{
+public:
+    CountingPluginHandleMapper() : m_nextHandle(1) { }
+
+    void addPlugin(Vamp::Plugin *p) {
+	if (m_rplugins.find(p) == m_rplugins.end()) {
+	    int32_t h = m_nextHandle++;
+	    m_plugins[h] = p;
+	    m_rplugins[p] = h;
+	}
+    }
+
+    void removePlugin(int32_t h) {
+	if (m_plugins.find(h) == m_plugins.end()) {
+	    throw NotFound();
+	}
+	Vamp::Plugin *p = m_plugins[h];
+	m_plugins.erase(h);
+	if (isConfigured(h)) {
+	    m_configuredPlugins.erase(h);
+	    m_channelCounts.erase(h);
+	}
+	m_rplugins.erase(p);
+    }
+    
+    int32_t pluginToHandle(Vamp::Plugin *p) const {
+	if (m_rplugins.find(p) == m_rplugins.end()) {
+	    throw NotFound();
+	}
+	return m_rplugins.at(p);
+    }
+    
+    Vamp::Plugin *handleToPlugin(int32_t h) const {
+	if (m_plugins.find(h) == m_plugins.end()) {
+	    throw NotFound();
+	}
+	return m_plugins.at(h);
+    }
+
+    bool isConfigured(int32_t h) const {
+	return m_configuredPlugins.find(h) != m_configuredPlugins.end();
+    }
+
+    void markConfigured(int32_t h, int channelCount, int blockSize) {
+	m_configuredPlugins.insert(h);
+	m_channelCounts[h] = channelCount;
+	m_blockSizes[h] = blockSize;
+    }
+
+    int getChannelCount(int32_t h) const {
+	if (m_channelCounts.find(h) == m_channelCounts.end()) {
+	    throw NotFound();
+	}
+	return m_channelCounts.at(h);
+    }
+
+    int getBlockSize(int32_t h) const {
+	if (m_blockSizes.find(h) == m_blockSizes.end()) {
+	    throw NotFound();
+	}
+	return m_blockSizes.at(h);
+    }
+    
+private:
+    int32_t m_nextHandle; // NB plugin handle type must fit in JSON number
+    std::map<uint32_t, Vamp::Plugin *> m_plugins;
+    std::map<Vamp::Plugin *, uint32_t> m_rplugins;
+    std::set<uint32_t> m_configuredPlugins;
+    std::map<uint32_t, int> m_channelCounts;
+    std::map<uint32_t, int> m_blockSizes;
+};
+
+}
+
+#endif