annotate vamp-support/PluginStaticData.h @ 186:52322dde68ea

Fix erroneous logic for handling step and block size in prior commit

The earlier change had a logical misconception. If PluginStub is
receiving the correct step and block size back from the configure call,
the plugin on the server side must have already been successfully
initialised, as the step and block size are only returned in a
successful configure response. This means the test for a failed
initialise and redo with the correct parameters must be done on the
server side (in LoaderRequests) not the client. The client has a more
complicated job, which is to notice that a *successful* configure had
returned different framing parameters from those passed to the
initialise call, and to pretend that it had actually failed until the
host called again with the correct parameters. We definitely need tests
for this!

/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */

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    Piper C++

    Centre for Digital Music, Queen Mary, University of London.
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#ifndef PIPER_PLUGIN_STATIC_DATA_H
#define PIPER_PLUGIN_STATIC_DATA_H

#include <vamp-hostsdk/Plugin.h>

namespace piper_vamp {

/**
 * \class PluginStaticData
 * 
 * PluginStaticData is a structure bundling together all the
 * information about a plugin that cannot be changed by the plugin
 * after it is loaded. That is, everything that does not depend on a
 * parameter or initialisation setting.
 *
 * All of the information in here can be queried from other sources
 * directly (notably the Vamp::Plugin class itself); this structure
 * just pulls it together in one place and provides something that can
 * be stored and recalled without having a Vamp::Plugin object to
 * hand.
 */
struct PluginStaticData
{
public:
    struct Basic {
	std::string identifier;
	std::string name;
	std::string description;
    };
    typedef std::vector<Basic> BasicList;

    PluginStaticData() : // invalid static data by default
	pluginVersion(0), minChannelCount(0), maxChannelCount(0),
	inputDomain(Vamp::Plugin::TimeDomain) { }

    std::string pluginKey;
    Basic basic;
    std::string maker;
    std::string copyright;
    int pluginVersion;
    std::vector<std::string> category;
    size_t minChannelCount;
    size_t maxChannelCount;
    Vamp::PluginBase::ParameterList parameters;
    Vamp::PluginBase::ProgramList programs;
    Vamp::Plugin::InputDomain inputDomain;
    BasicList basicOutputInfo;

    static PluginStaticData
    fromPlugin(std::string pluginKey,
	       std::vector<std::string> category,
	       Vamp::Plugin *p) {

	PluginStaticData d;
	d.pluginKey = pluginKey;
	d.basic.identifier = p->getIdentifier();
	d.basic.name = p->getName();
	d.basic.description = p->getDescription();
	d.maker = p->getMaker();
	d.copyright = p->getCopyright();
	d.pluginVersion = p->getPluginVersion();
	d.category = category;
	d.minChannelCount = p->getMinChannelCount();
	d.maxChannelCount = p->getMaxChannelCount();
	d.parameters = p->getParameterDescriptors();
	d.programs = p->getPrograms();
	d.inputDomain = p->getInputDomain();

	Vamp::Plugin::OutputList outputs = p->getOutputDescriptors();
	for (Vamp::Plugin::OutputList::const_iterator i = outputs.begin();
	     i != outputs.end(); ++i) {
	    Basic b;
	    b.identifier = i->identifier;
	    b.name = i->name;
	    b.description = i->description;
	    d.basicOutputInfo.push_back(b);
	}

	return d;
    }
};

}

#endif