annotate bits/CountingPluginHandleMapper.h @ 42:91f5c92d3bf7

Some JSON fixes and a quick test program

/* -*- 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.
  
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    furnished to do so, subject to the following conditions:

    The above copyright notice and this permission notice shall be
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    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,
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*/

#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