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/*************************************************************************** |
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* * |
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* Copyright (C) 2006 Christian Schoenebeck * |
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* * |
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* This library 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 library 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 * |
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* along with this library; if not, write to the Free Software * |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, * |
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* MA 02111-1307 USA * |
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***************************************************************************/ |
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#ifndef __LS_MIDIINSTRUMENTMAPPER_H__ |
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#define __LS_MIDIINSTRUMENTMAPPER_H__ |
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#include "../../common/global.h" |
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#include "../../common/optional.h" |
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#include "midi.h" |
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#include "../../engines/InstrumentManager.h" |
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#include <map> |
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namespace LinuxSampler { |
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// just symbol prototyping |
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class MidiInputPort; |
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/** @brief Mapping MIDI bank/program numbers with real instruments. |
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* |
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* By default (that is on startup) the sampler will simply ignore all |
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* MIDI program change messages. The MidiInstrumentMapper allows to map |
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* arbitrary (MIDI bank MSB, MIDI bank LSB, MIDI program) triples with |
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* an actual (Sampler Engine, Instrument File, Index) triple, so the |
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* sampler knows which instrument to load on the respective MIDI program |
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* change messages. |
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*/ |
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class MidiInstrumentMapper { |
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public: |
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/** |
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* Defines the life-time strategy for an instrument. |
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*/ |
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enum mode_t { |
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ON_DEMAND = 0, ///< Instrument will be loaded when needed, freed once not needed anymore. |
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ON_DEMAND_HOLD = 1, ///< Instrument will be loaded when needed and kept even if not needed anymore. |
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PERSISTENT = 2, ///< Instrument will immediately be loaded and kept all the time. |
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VOID = 127 ///< Don't care, let it up to the InstrumentManager to decide for an appropriate LoadMode. |
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}; |
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/** |
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* Defines the instrument and settings a MIDI bank MSB, LSB, |
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* program triple ought to be mapped to. |
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*/ |
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struct entry_t { |
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String EngineName; ///< The sampler engine to be used. |
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String InstrumentFile; ///< File name of the instrument to be loaded. |
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uint InstrumentIndex; ///< Index of the instrument within its file. |
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mode_t LoadMode; ///< Life-time strategy of instrument. |
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float Volume; ///< Global volume factor for this instrument. |
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String Name; ///< Display name that should be associated with this mapping. |
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}; |
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/** |
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* Adds a new entry to the sampler's MIDI instrument map in case |
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* an entry with \a Index does not exist yet, otherwise it will |
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* replace the existing entry. Note that some given settings |
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* might simply be ignored or might change the settings of other |
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* entries in the map (i.e. because another instrument in the |
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* map is part of the same file and the respective sampler |
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* engine does not allow to use different LoadModes for |
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* instruments of the same file). Note that in case of a |
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* PERSISTENT LoadMode argument the given instrument will |
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* immediately be loaded, that means by default this method will |
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* block until the whole instrument was loaded completely. You |
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* can override this behavior by setting \a bInBackground to |
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* true, so the instrument will be loaded in a separate thread |
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* (in that case you won't catch loading errors though, i.e. if |
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* the file does not exist or might be corrupt for example). |
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* |
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* @param Index - unique index of the new entry to add |
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* @param Entry - the actual instrument and settings |
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* @throws Exception - if the given engine type does not exist or instrument loading failed |
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*/ |
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static void AddOrReplaceMapping(midi_prog_index_t Index, entry_t Entry, bool bInBackground = false) throw (Exception); |
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/** |
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* Remove an existing entry from the MIDI instrument map. |
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* |
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* @param Index - index of entry to delete |
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*/ |
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static void RemoveMapping(midi_prog_index_t Index); |
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/** |
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* Clear the whole MIDI instrument map, that is delete all |
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* entries. |
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*/ |
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static void RemoveAllMappings(); |
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/** |
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* Returns the currently existing MIDI instrument map entries |
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* with their current settings. |
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*/ |
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static std::map<midi_prog_index_t,entry_t> Mappings(); |
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protected: |
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static optional<entry_t> GetEntry(midi_prog_index_t Index); // shall only be used by MidiInputPort ATM (see source comment) |
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friend class MidiInputPort; // allow MidiInputPort to access GetEntry() |
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}; |
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} // namespace LinuxSampler |
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#endif // __LS_MIDIINSTRUMENTMAPPER_H__ |