view vamp-support/RequestResponse.h @ 287:09753ad777db

Add support for ProgramParameters. In theory this means we can select a program and then re-query the plugin's parameters and get the right values back, just as would happen if we were working with the remote extractor directly as a local Vamp plugin.

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

/*
    Piper C++

    An API for audio analysis and feature extraction plugins.

    Centre for Digital Music, Queen Mary, University of London.
    Copyright 2006-2016 Chris Cannam and QMUL.
  
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    obtaining a copy of this software and associated documentation
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    of the Software, and to permit persons to whom the Software is
    furnished to do so, subject to the following conditions:

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    included in all copies or substantial portions of the Software.

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    EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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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 PIPER_REQUEST_RESPONSE_H
#define PIPER_REQUEST_RESPONSE_H

#include "PluginStaticData.h"
#include "PluginConfiguration.h"
#include "PluginProgramParameters.h"

#include <map>
#include <string>

namespace piper_vamp {

/**
 * \class ListRequest
 * 
 * ListRequest is a structure containing the information needed to
 * list plugins.
 *
 * \see ListResponse
 */
struct ListRequest
{
    ListRequest() { } // no constraints by default

    std::vector<std::string> from;
};

/**
 * \class ListResponse
 * 
 * ListResponse is a structure containing the information returned by
 * PluginLoader when asked to list static information about the
 * available plugins.
 *
 * \see PluginStaticData
 */
struct ListResponse
{
    ListResponse() { } // empty by default
    
    std::vector<PluginStaticData> available;
};

/**
 * \class LoadRequest
 * 
 * LoadRequest is a structure containing the information necessary to
 * load a plugin. When a request is made to load a plugin using a
 * LoadRequest, the response is typically returned in a LoadResponse
 * structure.
 *
 * \see LoadResponse
 */
struct LoadRequest
{
    LoadRequest() : // invalid request by default
	inputSampleRate(0.f),
	adapterFlags(0) { }

    /**
     * PluginKey is a string type that is used to identify a plugin
     * uniquely within the scope of "the current system". For further
     * details \see Vamp::PluginLoader::PluginKey.
     */
    typedef std::string PluginKey;

    /**
     * The identifying key for the plugin to be loaded.
     */
    PluginKey pluginKey;

    /**
     * Sample rate to be passed to the plugin's constructor.
     */
    float inputSampleRate;

    /** 
     * A bitwise OR of the values in the PluginLoader::AdapterFlags
     * enumeration, indicating under which circumstances an adapter
     * should be used to wrap the original plugin.  If adapterFlags is
     * 0, no optional adapters will be used.
     *
     * \see Vamp::PluginLoader::AdapterFlags
     */
    int adapterFlags;
};

/**
 * \class LoadResponse
 * 
 * LoadResponse is a structure containing the information returned by
 * PluginLoader when asked to load a plugin using a LoadRequest.
 *
 * If the plugin could not be loaded, the plugin field will be 0.
 *
 * The caller takes ownership of the plugin contained here, which
 * should be deleted (using the standard C++ delete keyword) after
 * use.
 *
 * \see LoadRequest
 */
struct LoadResponse
{
    LoadResponse() : // invalid (failed) response by default
	plugin(0) { }

    /**
     * A pointer to the loaded plugin, or 0 if loading failed. Caller
     * takes ownership of the plugin and must delete it after use.
     */
    Vamp::Plugin *plugin;

    /**
     * The static data associated with the loaded plugin, that is, all
     * information about it that does not depend on its configuration
     * (parameters, programs, initialisation parameters). The contents
     * of this structure are only valid if plugin is non-0.
     *
     * Much of the data in here is duplicated with the plugin itself.
     */
    PluginStaticData staticData;

    /**
     * The default configuration for this plugin, that is, default
     * values for parameters etc. The contents of this structure are
     * only valid if plugin is non-0.
     */
    PluginConfiguration defaultConfiguration;

    /**
     * The parameter values associated with any program settings
     * available for the plugin. The contents of this structure are
     * only valid if plugin is non-0.
     */
    PluginProgramParameters programParameters;
};

/**
 * \class ConfigurationRequest
 * 
 * A wrapper for a plugin pointer and PluginConfiguration, bundling up
 * the data needed to configure a plugin after it has been loaded.
 *
 * \see PluginConfiguration, ConfigurationResponse, LoadRequest, LoadResponse
 */
struct ConfigurationRequest
{
public:
    ConfigurationRequest() : // invalid request by default
	plugin(0) { }

    Vamp::Plugin *plugin;
    PluginConfiguration configuration;
};

/**
 * \class ConfigurationResponse
 *
 * The return value from a configuration request (i.e. setting the
 * parameters and initialising the plugin). If the configuration was
 * successful, the output list will contain the final
 * post-initialisation output descriptors and the required step and
 * block size. (The step and block size will usually match those
 * passed to configure, but may differ if the parameter settings
 * turned out to be incompatible with those.) If configuration failed,
 * the output list will be empty.
 *
 * \see PluginConfiguration, ConfigurationRequest, LoadRequest, LoadResponse
 */
struct ConfigurationResponse
{
public:
    ConfigurationResponse() : // failed by default
        plugin(0) { }

    Vamp::Plugin *plugin;
    Vamp::Plugin::OutputList outputs;
    StaticOutputInfo staticOutputInfo; // stuff not in Plugin::OutputDescriptor
    
    Framing framing;
};

/**
 * \class ProcessRequest
 *
 * A structure that bundles the necessary data for making a process
 * call: plugin, input buffers, and timestamp. Caller retains
 * ownership of the plugin, but the buffers are passed "by value" to
 * avoid ownership concerns. 
 *
 * \see Vamp::Plugin::process()
 */
struct ProcessRequest
{
public:
    ProcessRequest() : // invalid by default
        plugin(0) { }

    Vamp::Plugin *plugin;
    std::vector<std::vector<float> > inputBuffers;
    Vamp::RealTime timestamp;
};

/**
 * \class ProcessResponse
 *
 * A structure that bundles the data returned by a process call. This
 * is simply a FeatureSet wrapper that happens to reference the plugin
 * as well.
 *
 * \see FinishResponse, Vamp::Plugin::process()
 */
struct ProcessResponse
{
public:
    ProcessResponse() : // invalid by default
        plugin(0) { }

    Vamp::Plugin *plugin;
    Vamp::Plugin::FeatureSet features;
};

/**
 * \class FinishRequest
 *
 * A structure that bundles the necessary data for finishing
 * processing, i.e. calling getRemainingFeatures(). This consists only
 * of the plugin pointer. Caller retains ownership of the plugin.
 *
 * \see Vamp::Plugin::getRemainingFeatures()
 */
struct FinishRequest
{
public:
    FinishRequest() : // invalid by default
        plugin(0) { }

    Vamp::Plugin *plugin;
};


/**
 * \class FinishResponse
 *
 * A structure that bundles the data returned by a
 * getRemainingFeatures() call. This is identical to ProcessResponse.
 *
 * \see ProcessResponse, Vamp::Plugin::getRemainingFeatures()
 */
struct FinishResponse
{
public:
    FinishResponse() : // invalid by default
        plugin(0) { }

    Vamp::Plugin *plugin;
    Vamp::Plugin::FeatureSet features;
};

}

#endif