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Diffstat (limited to 'libs/evoral/evoral/PatchChange.hpp')
| -rw-r--r-- | libs/evoral/evoral/PatchChange.hpp | 166 |
1 files changed, 166 insertions, 0 deletions
diff --git a/libs/evoral/evoral/PatchChange.hpp b/libs/evoral/evoral/PatchChange.hpp new file mode 100644 index 0000000000..576a1d2e98 --- /dev/null +++ b/libs/evoral/evoral/PatchChange.hpp @@ -0,0 +1,166 @@ +/* + Copyright (C) 2010 Paul Davis + Author: Carl Hetherington <cth@carlh.net> + + This program 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 program 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., 675 Mass Ave, Cambridge, MA 02139, USA. +*/ + +#ifndef EVORAL_PATCH_CHANGE_HPP +#define EVORAL_PATCH_CHANGE_HPP + +#include "evoral/Event.hpp" +#include "evoral/MIDIEvent.hpp" + +namespace Evoral { + +/** Event representing a `patch change', composed of a LSB and MSB + * bank select and then a program change. + */ +template<typename Time> +class PatchChange +{ +public: + /** @param t Time. + * @param c Channel. + * @param p Program change number (counted from 0). + * @param b Bank number (counted from 0, 14-bit). + */ + PatchChange (Time t, uint8_t c, uint8_t p, int b) + : _bank_change_msb (0, t, 3, 0, true) + , _bank_change_lsb (0, t, 3, 0, true) + , _program_change (0, t, 2, 0, true) + { + _bank_change_msb.buffer()[0] = MIDI_CMD_CONTROL | c; + _bank_change_msb.buffer()[1] = MIDI_CTL_MSB_BANK; + _bank_change_msb.buffer()[2] = (b >> 7) & 0x7f; + + _bank_change_lsb.buffer()[0] = MIDI_CMD_CONTROL | c; + _bank_change_lsb.buffer()[1] = MIDI_CTL_LSB_BANK; + _bank_change_lsb.buffer()[2] = b & 0x7f; + + _program_change.buffer()[0] = MIDI_CMD_PGM_CHANGE | c; + _program_change.buffer()[1] = p; + } + + PatchChange (const PatchChange & other) + : _bank_change_msb (other._bank_change_msb, true) + , _bank_change_lsb (other._bank_change_lsb, true) + , _program_change (other._program_change, true) + { + set_id (other.id ()); + } + + event_id_t id () const { + return _program_change.id (); + } + + void set_id (event_id_t id) { + _bank_change_msb.set_id (id); + _bank_change_lsb.set_id (id); + _program_change.set_id (id); + } + + Time time () const { + return _program_change.time (); + } + + void set_time (Time t) { + _bank_change_msb.set_time (t); + _bank_change_lsb.set_time (t); + _program_change.set_time (t); + } + + void set_channel (uint8_t c) { + _bank_change_msb.buffer()[0] &= 0xf0; + _bank_change_msb.buffer()[0] |= c; + _bank_change_lsb.buffer()[0] &= 0xf0; + _bank_change_lsb.buffer()[0] |= c; + _program_change.buffer()[0] &= 0xf0; + _program_change.buffer()[0] |= c; + } + + uint8_t program () const { + return _program_change.buffer()[1]; + } + + void set_program (uint8_t p) { + _program_change.buffer()[1] = p; + } + + int bank () const { + return (bank_msb() << 7) | bank_lsb(); + } + + void set_bank (int b) { + _bank_change_msb.buffer()[2] = (b >> 7) & 0x7f; + _bank_change_lsb.buffer()[2] = b & 0x7f; + } + + uint8_t bank_msb () const { + return _bank_change_msb.buffer()[2]; + } + + uint8_t bank_lsb () const { + return _bank_change_lsb.buffer()[2]; + } + + uint8_t channel () const { return _program_change.buffer()[0] & 0xf; } + + inline bool operator< (const PatchChange<Time>& o) const { + if (time() != o.time()) { + return time() < o.time(); + } + + if (bank != o.bank()) { + return bank() < o.bank(); + } + + return (program() < o.program()); + } + + inline bool operator== (const PatchChange<Time>& o) const { + return (time() == o.time() && program() == o.program() && bank() == o.bank()); + } + + /** The PatchChange is made up of messages() MIDI messages; this method returns them by index. + * @param i index of message to return. + */ + MIDIEvent<Time> const & message (int i) const { + switch (i) { + case 0: + return _bank_change_msb; + case 1: + return _bank_change_lsb; + case 2: + return _program_change; + default: + assert (false); + } + } + + /** @return Number of MIDI messages that make up this change */ + int messages () const { + return 3; + } + +private: + MIDIEvent<Time> _bank_change_msb; + MIDIEvent<Time> _bank_change_lsb; + MIDIEvent<Time> _program_change; +}; + +} + +#endif |