409 lines
12 KiB
C++
409 lines
12 KiB
C++
/*
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* Copyright (C) 2016-2019 Robin Gareus <robin@gareus.org>
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* Copyright (C) 2017 Paul Davis <paul@linuxaudiosystems.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef _ardour_lua_api_h_
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#define _ardour_lua_api_h_
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#include <string>
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#include <lo/lo.h>
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#include <boost/shared_ptr.hpp>
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#include <vamp-hostsdk/Plugin.h>
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#include "evoral/Note.h"
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#include "ardour/libardour_visibility.h"
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#include "ardour/midi_model.h"
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#include "ardour/processor.h"
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#include "ardour/session.h"
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namespace ARDOUR {
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class Readable;
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}
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namespace ARDOUR { namespace LuaAPI {
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/** convenience constructor for DataType::NIL with managed lifetime
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* @returns DataType::NIL
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*/
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int datatype_ctor_null (lua_State *lua);
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/** convenience constructor for DataType::AUDIO with managed lifetime
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* @returns DataType::AUDIO
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*/
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int datatype_ctor_audio (lua_State *L);
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/** convenience constructor for DataType::MIDI with managed lifetime
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* @returns DataType::MIDI
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*/
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int datatype_ctor_midi (lua_State *L);
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/** Create a null processor shared pointer
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*
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* This is useful for Track:bounce() to indicate no processing.
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*/
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boost::shared_ptr<ARDOUR::Processor> nil_processor ();
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/** create a new Lua Processor (Plugin)
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*
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* @param s Session Handle
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* @param p Identifier or Name of the Processor
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* @returns Processor object (may be nil)
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*/
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boost::shared_ptr<ARDOUR::Processor> new_luaproc (ARDOUR::Session *s, const std::string& p);
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/** List all installed plugins */
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std::list<boost::shared_ptr<ARDOUR::PluginInfo> > list_plugins ();
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/** search a Plugin
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*
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* @param id Plugin Name, ID or URI
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* @param type Plugin Type
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* @returns PluginInfo or nil if not found
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*/
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boost::shared_ptr<ARDOUR::PluginInfo> new_plugin_info (const std::string& id, ARDOUR::PluginType type);
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/** create a new Plugin Instance
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*
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* @param s Session Handle
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* @param id Plugin Name, ID or URI
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* @param type Plugin Type
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* @param preset name of plugin-preset to load, leave empty "" to not load any preset after instantiation
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* @returns Processor or nil
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*/
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boost::shared_ptr<ARDOUR::Processor> new_plugin (ARDOUR::Session *s, const std::string& id, ARDOUR::PluginType type, const std::string& preset = "");
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/** set a plugin control-input parameter value
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*
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* @param proc Plugin-Processor
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* @param which control-input to set (starting at 0)
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* @param value value to set
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* @returns true on success, false on error or out-of-bounds value
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*/
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bool set_processor_param (boost::shared_ptr<ARDOUR::Processor> proc, uint32_t which, float value);
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/** get a plugin control parameter value
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*
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* @param proc Plugin-Processor
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* @param which control port to set (starting at 0, including ports of type input and output))
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* @param ok boolean variable contains true or false after call returned. to be checked by caller before using value.
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* @returns value
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*/
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float get_processor_param (boost::shared_ptr<Processor> proc, uint32_t which, bool &ok);
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/** reset a processor to its default values (only works for plugins )
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*
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* This is a wrapper which looks up the Processor by plugin-insert.
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*
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* @param proc Plugin-Insert
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* @returns true on success, false when the processor is not a plugin
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*/
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bool reset_processor_to_default (boost::shared_ptr<Processor> proc);
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/** set a plugin control-input parameter value
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*
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* This is a wrapper around set_processor_param which looks up the Processor by plugin-insert.
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*
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* @param pi Plugin-Insert
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* @param which control-input to set (starting at 0)
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* @param value value to set
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* @returns true on success, false on error or out-of-bounds value
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*/
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bool set_plugin_insert_param (boost::shared_ptr<ARDOUR::PluginInsert> pi, uint32_t which, float value);
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/** get a plugin control parameter value
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*
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* @param pi Plugin-Insert
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* @param which control port to query (starting at 0, including ports of type input and output)
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* @param ok boolean variable contains true or false after call returned. to be checked by caller before using value.
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* @returns value
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*/
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float get_plugin_insert_param (boost::shared_ptr<ARDOUR::PluginInsert> pi, uint32_t which, bool &ok);
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/**
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* A convenience function to get a Automation Lists and ParamaterDescriptor
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* for a given plugin control.
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*
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* This is equivalent to the following lua code
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* @code
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* function (processor, param_id)
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* local plugininsert = processor:to_insert ()
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* local plugin = plugininsert:plugin(0)
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* local _, t = plugin:get_parameter_descriptor(param_id, ARDOUR.ParameterDescriptor ())
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* local ctrl = Evoral.Parameter (ARDOUR.AutomationType.PluginAutomation, 0, param_id)
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* local ac = pi:automation_control (ctrl, false)
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* local acl = ac:alist()
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* return ac:alist(), ac:to_ctrl():list(), t[2]
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* end
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* @endcode
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*
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* Example usage: get the third input parameter of first plugin on the given route
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* (Ardour starts counting at zero).
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* @code
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* local al, cl, pd = ARDOUR.LuaAPI.plugin_automation (route:nth_plugin (0), 3)
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* @endcode
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* @returns 3 parameters: AutomationList, ControlList, ParamaterDescriptor
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*/
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int plugin_automation (lua_State *lua);
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/**
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* A convenience function for colorspace HSL to RGB conversion.
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* All ranges are 0..1
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*
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* Example:
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* @code
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* local r, g, b, a = ARDOUR.LuaAPI.hsla_to_rgba (hue, saturation, luminosity, alpha)
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* @endcode
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* @returns 4 parameters: red, green, blue, alpha (in range 0..1)
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*/
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int hsla_to_rgba (lua_State *lua);
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/**
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* A convenience function to expand RGBA parameters from an integer
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*
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* convert a Canvas::Color (uint32_t 0xRRGGBBAA) into
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* double RGBA values which can be passed as parameters to
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* Cairo::Context::set_source_rgba
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*
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* Example:
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* @code
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* local r, g, b, a = ARDOUR.LuaAPI.color_to_rgba (0x88aa44ff)
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* cairo_ctx:set_source_rgba (ARDOUR.LuaAPI.color_to_rgba (0x11336699)
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* @endcode
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* @returns 4 parameters: red, green, blue, alpha (in range 0..1)
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*/
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int color_to_rgba (lua_State *lua);
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/**
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*/
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std::string ascii_dtostr (const double d);
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/**
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* Creates a filename from a series of elements using the correct separator for filenames.
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*
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* No attempt is made to force the resulting filename to be an absolute path.
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* If the first element is a relative path, the result will be a relative path.
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*/
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int build_filename (lua_State *lua);
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/**
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* Generic conversion from audio sample count to timecode.
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* (TimecodeType, sample-rate, sample-pos)
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*/
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int sample_to_timecode (lua_State *L);
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/**
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* Generic conversion from timecode to audio sample count.
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* (TimecodeType, sample-rate, hh, mm, ss, ff)
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*/
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int timecode_to_sample (lua_State *L);
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/**
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* Use current session settings to convert
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* audio-sample count into hh, mm, ss, ff
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* timecode (this include session pull up/down).
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*/
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int sample_to_timecode_lua (lua_State *L);
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/**
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* Use current session settings to convert
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* timecode (hh, mm, ss, ff) to audio-sample
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* count (this include session pull up/down).
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*/
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int timecode_to_sample_lua (lua_State *L);
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class Vamp {
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/** Vamp Plugin Interface
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*
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* Vamp is an audio processing plugin system for plugins that extract descriptive information
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* from audio data - typically referred to as audio analysis plugins or audio feature
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* extraction plugins.
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*
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* This interface allows to load a plugins and directly access it using the Vamp Plugin API.
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*
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* A convenience method is provided to analyze Ardour::Readable objects (Regions).
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*/
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public:
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Vamp (const std::string&, float sample_rate);
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~Vamp ();
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/** Search for all available available Vamp plugins.
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* @returns list of plugin-keys
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*/
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static std::vector<std::string> list_plugins ();
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::Vamp::Plugin* plugin () { return _plugin; }
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/** high-level abstraction to process a single channel of the given Readable.
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*
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* If the plugin is not yet initialized, initialize() is called.
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*
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* if \p fn is not nil, it is called with the immediate
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* Vamp::Plugin::Features on every process call.
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*
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* @param r readable
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* @param channel channel to process
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* @param fn lua callback function or nil
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* @return 0 on success
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*/
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int analyze (boost::shared_ptr<ARDOUR::Readable> r, uint32_t channel, luabridge::LuaRef fn);
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/** call plugin():reset() and clear intialization flag */
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void reset ();
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/** initialize the plugin for use with analyze().
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*
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* This is equivalent to plugin():initialise (1, ssiz, bsiz)
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* and prepares a plugin for analyze.
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* (by preferred step and block sizes are used. if the plugin
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* does not specify them or they're larger than 8K, both are set to 1024)
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*
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* Manual initialization is only required to set plugin-parameters
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* which depend on prior initialization of the plugin.
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*
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* @code
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* vamp:reset ()
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* vamp:initialize ()
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* vamp:plugin():setParameter (0, 1.5, nil)
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* vamp:analyze (r, 0)
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* @endcode
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*/
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bool initialize ();
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bool initialized () const { return _initialized; }
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/** process given array of audio-samples.
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*
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* This is a lua-binding for vamp:plugin():process ()
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*
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* @param d audio-data, the vector must match the configured channel count
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* and hold a complete buffer for every channel as set during
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* plugin():initialise()
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* @param rt timestamp matching the provided buffer.
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* @returns features extracted from that data (if the plugin is causal)
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*/
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::Vamp::Plugin::FeatureSet process (const std::vector<float*>& d, ::Vamp::RealTime rt);
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private:
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::Vamp::Plugin* _plugin;
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float _sample_rate;
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samplecnt_t _bufsize;
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samplecnt_t _stepsize;
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bool _initialized;
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};
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boost::shared_ptr<Evoral::Note<Temporal::Beats> >
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new_noteptr (uint8_t, Temporal::Beats, Temporal::Beats, uint8_t, uint8_t);
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std::list<boost::shared_ptr< Evoral::Note<Temporal::Beats> > >
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note_list (boost::shared_ptr<ARDOUR::MidiModel>);
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} } /* namespace */
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namespace ARDOUR { namespace LuaOSC {
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/** OSC transmitter
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*
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* A Class to send OSC messages.
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*/
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class Address {
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/*
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* OSC is kinda special, lo_address is a void* and lo_send() has varags
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* and typed arguments which makes it hard to bind, even lo_cpp.
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*/
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public:
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/** Construct a new OSC transmitter object
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* @param uri the destination uri e.g. "osc.udp://localhost:7890"
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*/
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Address (std::string uri) {
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_addr = lo_address_new_from_url (uri.c_str());
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}
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~Address () { if (_addr) { lo_address_free (_addr); } }
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/** Transmit an OSC message
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*
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* Path (string) and type (string) must always be given.
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* The number of following args must match the type.
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* Supported types are:
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*
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* 'i': integer (lua number)
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*
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* 'f': float (lua number)
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*
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* 'd': double (lua number)
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*
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* 'h': 64bit integer (lua number)
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*
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* 's': string (lua string)
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*
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* 'c': character (lua string)
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*
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* 'T': boolean (lua bool) -- this is not implicily True, a lua true/false must be given
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*
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* 'F': boolean (lua bool) -- this is not implicily False, a lua true/false must be given
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*
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* @param lua: lua arguments: path, types, ...
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* @returns boolean true if successful, false on error.
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*/
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int send (lua_State *lua);
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private:
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lo_address _addr;
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};
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}
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class LuaTableRef {
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public:
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LuaTableRef ();
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~LuaTableRef ();
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int get (lua_State* L);
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int set (lua_State* L);
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private:
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struct LuaTableEntry {
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LuaTableEntry (int kt, int vt)
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: keytype (kt)
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, valuetype (vt)
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{ }
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int keytype;
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std::string k_s;
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unsigned int k_n;
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int valuetype;
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// LUA_TUSERDATA
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const void* c;
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void* p;
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// LUA_TBOOLEAN
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bool b;
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// LUA_TSTRING:
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std::string s;
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// LUA_TNUMBER:
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double n;
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};
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std::vector<LuaTableEntry> _data;
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static void* findclasskey (lua_State *L, const void* key);
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template<typename T>
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static void assign (luabridge::LuaRef* rv, T key, const LuaTableEntry& s);
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};
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} /* namespace */
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#endif // _ardour_lua_api_h_
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