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Diffstat (limited to 'src/engine/ingen_lv2.cpp')
| -rw-r--r-- | src/engine/ingen_lv2.cpp | 195 |
1 files changed, 195 insertions, 0 deletions
diff --git a/src/engine/ingen_lv2.cpp b/src/engine/ingen_lv2.cpp new file mode 100644 index 00000000..424df46c --- /dev/null +++ b/src/engine/ingen_lv2.cpp @@ -0,0 +1,195 @@ +/* Ingen.LV2 - A thin wrapper which allows Ingen to run as an LV2 plugin. + * Copyright (C) 2008-2009 Dave Robillard <http://drobilla.net> + * + * This library is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the Free + * Software Foundation; either version 2 of the License, or (at your option) + * any later version. + * + * This library is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#ifndef PLUGIN_URI +#error "This file requires PLUGIN_URI to be defined" +#endif + +#include <stdlib.h> +#include "lv2.h" +#include "engine/Engine.hpp" +#include "engine/Driver.hpp" +#include "engine/ProcessContext.hpp" +#include "engine/PatchImpl.hpp" +#include "module/World.hpp" + +extern "C" { + +using namespace Ingen; + +/* Plugin */ + +struct IngenLV2Driver : public Ingen::Driver { + IngenLV2Driver(Engine& engine, SampleCount buffer_size, SampleCount sample_rate) + : _context(engine) + , _buffer_size(buffer_size) + , _sample_rate(sample_rate) + , _frame_time(0) + , _root_patch(NULL) + {} + + void activate() {} + void deactivate() {} + bool is_activated() const { return true; } + + void run(uint32_t nframes) { + _context.locate(_frame_time, nframes, 0); + if (_root_patch) + _root_patch->process(_context); + _frame_time += nframes; + } + + virtual void set_root_patch(PatchImpl* patch) {} + virtual PatchImpl* root_patch() { return NULL; } + + virtual void add_port(DriverPort* port) {} + virtual DriverPort* remove_port(const Raul::Path& path) { return NULL; } + + virtual DriverPort* create_port(DuplexPort* patch_port) { return NULL; } + + virtual DriverPort* driver_port(const Raul::Path& path) { return NULL; } + + virtual SampleCount buffer_size() const { return _buffer_size; } + virtual SampleCount sample_rate() const { return _sample_rate; } + virtual SampleCount frame_time() const { return _frame_time;} + + virtual bool is_realtime() const { return true; } + virtual ProcessContext& context() { return _context; } + +private: + ProcessContext _context; + PatchImpl* _root_patch; + SampleCount _buffer_size; + SampleCount _sample_rate; + SampleCount _frame_time; +}; + + +struct IngenPlugin { + Ingen::Shared::World* world; + SharedPtr<Ingen::Engine> engine; +}; + + +static void +ingen_activate(LV2_Handle instance) +{ + IngenPlugin* plugin = (IngenPlugin*)instance; + plugin->engine->activate(1); +} + + +static void +ingen_cleanup(LV2_Handle instance) +{ + IngenPlugin* plugin = (IngenPlugin*)instance; + plugin->engine.reset(); + ingen_destroy_world(); + free(instance); +} + + +static void +ingen_connect_port(LV2_Handle instance, uint32_t port, void* data) +{ +} + + +static LV2_Handle +ingen_instantiate(const LV2_Descriptor* descriptor, + double rate, + const char* bundle_path, + const LV2_Feature*const* features) +{ + IngenPlugin* plugin = (IngenPlugin*)malloc(sizeof(IngenPlugin)); + + Shared::bundle_path = bundle_path; + + plugin->world = ingen_get_world(); + plugin->engine = SharedPtr<Engine>(new Engine(plugin->world)); + plugin->world->local_engine = plugin->engine; + + // FIXME: fixed buffer size + plugin->engine->set_driver(PortType::AUDIO, + SharedPtr<Driver>(new IngenLV2Driver(*plugin->engine, rate, 4096))); + + return (LV2_Handle)plugin; +} + + +static void +ingen_run(LV2_Handle instance, uint32_t sample_count) +{ + IngenPlugin* plugin = (IngenPlugin*)instance; + ((IngenLV2Driver*)plugin->engine->driver())->run(sample_count); +} + + +static const void* +ingen_extension_data(const char* uri) +{ + return NULL; +} + + +static void +ingen_deactivate(LV2_Handle instance) +{ + IngenPlugin* plugin = (IngenPlugin*)instance; + plugin->engine->deactivate(); +} + + +/* Library */ + +static LV2_Descriptor *ingen_descriptor = NULL; + +static void +init_descriptor() +{ + ingen_descriptor = (LV2_Descriptor*)malloc(sizeof(LV2_Descriptor)); + + ingen_descriptor->URI = PLUGIN_URI; + ingen_descriptor->instantiate = ingen_instantiate; + ingen_descriptor->connect_port = ingen_connect_port; + ingen_descriptor->activate = ingen_activate; + ingen_descriptor->run = ingen_run; + ingen_descriptor->deactivate = ingen_deactivate; + ingen_descriptor->cleanup = ingen_cleanup; + ingen_descriptor->extension_data = ingen_extension_data; +} + + +LV2_SYMBOL_EXPORT +const LV2_Descriptor* +lv2_descriptor(uint32_t index) +{ + if (!ingen_descriptor) + init_descriptor(); + + switch (index) { + case 0: + return ingen_descriptor; + default: + return NULL; + } +} + + +} // extern "C" + |