diff VamPipeAdapter.h @ 69:967b0619b090

Start on plugin-library-to-json-request-response-handler adapter

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/VamPipeAdapter.h	Mon Aug 22 17:17:28 2016 +0100
@@ -0,0 +1,126 @@
+/* -*- 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 2015-2016 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_ADAPTER_H
+#define VAMPIPE_ADAPTER_H
+
+#include <vamp-hostsdk/PluginStaticData.h>
+#include <vamp-hostsdk/PluginConfiguration.h>
+#include <vamp-hostsdk/RequestResponse.h>
+
+#include <vamp-hostsdk/PluginInputDomainAdapter.h>
+#include <vamp-hostsdk/PluginBufferingAdapter.h>
+#include <vamp-hostsdk/PluginChannelAdapter.h>
+
+namespace vampipe {
+
+class VamPipeAdapterBase
+{
+public:
+    virtual Vamp::HostExt::PluginStaticData getStaticData() const = 0;
+    virtual Vamp::HostExt::LoadResponse loadPlugin(Vamp::HostExt::LoadRequest r) const = 0;
+};
+
+template <typename P>
+class VamPipeAdapter : public VamPipeAdapterBase
+{
+    const int adaptInputDomain = 0x01;
+    const int adaptChannelCount = 0x02;
+    const int adaptBufferSize = 0x04;
+    
+public:
+    VamPipeAdapter(std::string libname) :
+	m_soname(libname) { }
+    
+    virtual Vamp::HostExt::PluginStaticData getStaticData() const {
+	P p(44100.f);
+	return Vamp::HostExt::PluginStaticData::fromPlugin
+	    (m_soname + ":" + p.getIdentifier(),
+	     {}, //!!! todo: category - tricky one that
+	     &p);
+    }
+
+    virtual Vamp::HostExt::LoadResponse loadPlugin(Vamp::HostExt::
+						   LoadRequest r) const {
+	
+	// We assume the caller has guaranteed that the request is for
+	// the correct plugin (so we don't have to check the plugin
+	// key field here)
+
+	Vamp::Plugin *p = new P(r.inputSampleRate);
+	
+	if (r.adapterFlags & adaptInputDomain) {
+	    if (p->getInputDomain() == Vamp::Plugin::FrequencyDomain) {
+		p = new Vamp::HostExt::PluginInputDomainAdapter(p);
+	    }
+	}
+
+	if (r.adapterFlags & adaptBufferSize) {
+	    p = new Vamp::HostExt::PluginBufferingAdapter(p);
+	}
+
+	if (r.adapterFlags & adaptChannelCount) {
+	    p = new Vamp::HostExt::PluginChannelAdapter(p);
+	}
+
+	Vamp::HostExt::LoadResponse response;
+	response.plugin = p;
+
+	response.staticData = Vamp::HostExt::PluginStaticData::fromPlugin
+	    (m_soname + ":" + p->getIdentifier(),
+	     {}, //!!! todo: category - tricky one that
+	     p);
+
+	int defaultChannels = 0;
+	if (p->getMinChannelCount() == p->getMaxChannelCount()) {
+	    defaultChannels = p->getMinChannelCount();
+	}
+    
+	response.defaultConfiguration = Vamp::HostExt::PluginConfiguration::fromPlugin
+	    (p,
+	     defaultChannels,
+	     p->getPreferredStepSize(),
+	     p->getPreferredBlockSize());
+    
+	return response;
+    }
+    
+private:
+    std::string m_soname;
+};
+
+}
+
+#endif
+