diff options
Diffstat (limited to 'quantum/midi/midi.c')
| -rw-r--r-- | quantum/midi/midi.c | 247 | 
1 files changed, 247 insertions, 0 deletions
| diff --git a/quantum/midi/midi.c b/quantum/midi/midi.c new file mode 100644 index 0000000000..1ba3e73a40 --- /dev/null +++ b/quantum/midi/midi.c @@ -0,0 +1,247 @@ +// midi for embedded chips, +// Copyright 2010 Alex Norman +// +// This file is part of avr-midi. +// +// avr-midi 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 3 of the License, or +//(at your option) any later version. +// +// avr-midi 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 avr-midi.  If not, see <http://www.gnu.org/licenses/>. + +#include "midi.h" +#include <string.h> //for memcpy + +#ifndef MIN +#    define MIN(x, y) (((x) < (y)) ? (x) : (y)) +#endif + +#ifndef NULL +#    define NULL 0 +#endif + +bool midi_is_statusbyte(uint8_t theByte) { +    return (bool)(theByte & MIDI_STATUSMASK); +} + +bool midi_is_realtime(uint8_t theByte) { +    return (theByte >= MIDI_CLOCK); +} + +midi_packet_length_t midi_packet_length(uint8_t status) { +    switch (status & 0xF0) { +        case MIDI_CC: +        case MIDI_NOTEON: +        case MIDI_NOTEOFF: +        case MIDI_AFTERTOUCH: +        case MIDI_PITCHBEND: +            return THREE; +        case MIDI_PROGCHANGE: +        case MIDI_CHANPRESSURE: +        case MIDI_SONGSELECT: +            return TWO; +        case 0xF0: +            switch (status) { +                case MIDI_CLOCK: +                case MIDI_TICK: +                case MIDI_START: +                case MIDI_CONTINUE: +                case MIDI_STOP: +                case MIDI_ACTIVESENSE: +                case MIDI_RESET: +                case MIDI_TUNEREQUEST: +                    return ONE; +                case MIDI_SONGPOSITION: +                    return THREE; +                case MIDI_TC_QUARTERFRAME: +                case MIDI_SONGSELECT: +                    return TWO; +                case SYSEX_END: +                case SYSEX_BEGIN: +                default: +                    return UNDEFINED; +            } +        default: +            return UNDEFINED; +    } +} + +void midi_send_cc(MidiDevice* device, uint8_t chan, uint8_t num, uint8_t val) { +    // CC Status: 0xB0 to 0xBF where the low nibble is the MIDI channel. +    // CC Data: Controller Num, Controller Val +    device->send_func(device, 3, MIDI_CC | (chan & MIDI_CHANMASK), num & 0x7F, val & 0x7F); +} + +void midi_send_noteon(MidiDevice* device, uint8_t chan, uint8_t num, uint8_t vel) { +    // Note Data: Note Num, Note Velocity +    device->send_func(device, 3, MIDI_NOTEON | (chan & MIDI_CHANMASK), num & 0x7F, vel & 0x7F); +} + +void midi_send_noteoff(MidiDevice* device, uint8_t chan, uint8_t num, uint8_t vel) { +    // Note Data: Note Num, Note Velocity +    device->send_func(device, 3, MIDI_NOTEOFF | (chan & MIDI_CHANMASK), num & 0x7F, vel & 0x7F); +} + +void midi_send_aftertouch(MidiDevice* device, uint8_t chan, uint8_t note_num, uint8_t amt) { +    device->send_func(device, 3, MIDI_AFTERTOUCH | (chan & MIDI_CHANMASK), note_num & 0x7F, amt & 0x7F); +} + +// XXX does this work right? +// amt in range -0x2000, 0x1fff +// uAmt should be in range.. +// 0x0000 to 0x3FFF +void midi_send_pitchbend(MidiDevice* device, uint8_t chan, int16_t amt) { +    uint16_t uAmt; +    // check range +    if (amt > 0x1fff) { +        uAmt = 0x3FFF; +    } else if (amt < -0x2000) { +        uAmt = 0; +    } else { +        uAmt = amt + 0x2000; +    } +    device->send_func(device, 3, MIDI_PITCHBEND | (chan & MIDI_CHANMASK), uAmt & 0x7F, (uAmt >> 7) & 0x7F); +} + +void midi_send_programchange(MidiDevice* device, uint8_t chan, uint8_t num) { +    device->send_func(device, 2, MIDI_PROGCHANGE | (chan & MIDI_CHANMASK), num & 0x7F, 0); +} + +void midi_send_channelpressure(MidiDevice* device, uint8_t chan, uint8_t amt) { +    device->send_func(device, 2, MIDI_CHANPRESSURE | (chan & MIDI_CHANMASK), amt & 0x7F, 0); +} + +void midi_send_clock(MidiDevice* device) { +    device->send_func(device, 1, MIDI_CLOCK, 0, 0); +} + +void midi_send_tick(MidiDevice* device) { +    device->send_func(device, 1, MIDI_TICK, 0, 0); +} + +void midi_send_start(MidiDevice* device) { +    device->send_func(device, 1, MIDI_START, 0, 0); +} + +void midi_send_continue(MidiDevice* device) { +    device->send_func(device, 1, MIDI_CONTINUE, 0, 0); +} + +void midi_send_stop(MidiDevice* device) { +    device->send_func(device, 1, MIDI_STOP, 0, 0); +} + +void midi_send_activesense(MidiDevice* device) { +    device->send_func(device, 1, MIDI_ACTIVESENSE, 0, 0); +} + +void midi_send_reset(MidiDevice* device) { +    device->send_func(device, 1, MIDI_RESET, 0, 0); +} + +void midi_send_tcquarterframe(MidiDevice* device, uint8_t time) { +    device->send_func(device, 2, MIDI_TC_QUARTERFRAME, time & 0x7F, 0); +} + +// XXX is this right? +void midi_send_songposition(MidiDevice* device, uint16_t pos) { +    device->send_func(device, 3, MIDI_SONGPOSITION, pos & 0x7F, (pos >> 7) & 0x7F); +} + +void midi_send_songselect(MidiDevice* device, uint8_t song) { +    device->send_func(device, 2, MIDI_SONGSELECT, song & 0x7F, 0); +} + +void midi_send_tunerequest(MidiDevice* device) { +    device->send_func(device, 1, MIDI_TUNEREQUEST, 0, 0); +} + +void midi_send_byte(MidiDevice* device, uint8_t b) { +    device->send_func(device, 1, b, 0, 0); +} + +void midi_send_data(MidiDevice* device, uint16_t count, uint8_t byte0, uint8_t byte1, uint8_t byte2) { +    // ensure that the count passed along is always 3 or lower +    if (count > 3) { +        // TODO how to do this correctly? +    } +    device->send_func(device, count, byte0, byte1, byte2); +} + +void midi_send_array(MidiDevice* device, uint16_t count, uint8_t* array) { +    uint16_t i; +    for (i = 0; i < count; i += 3) { +        uint8_t  b[3]    = {0, 0, 0}; +        uint16_t to_send = count - i; +        to_send          = (to_send > 3) ? 3 : to_send; +        memcpy(b, array + i, to_send); +        midi_send_data(device, to_send, b[0], b[1], b[2]); +    } +} + +void midi_register_cc_callback(MidiDevice* device, midi_three_byte_func_t func) { +    device->input_cc_callback = func; +} + +void midi_register_noteon_callback(MidiDevice* device, midi_three_byte_func_t func) { +    device->input_noteon_callback = func; +} + +void midi_register_noteoff_callback(MidiDevice* device, midi_three_byte_func_t func) { +    device->input_noteoff_callback = func; +} + +void midi_register_aftertouch_callback(MidiDevice* device, midi_three_byte_func_t func) { +    device->input_aftertouch_callback = func; +} + +void midi_register_pitchbend_callback(MidiDevice* device, midi_three_byte_func_t func) { +    device->input_pitchbend_callback = func; +} + +void midi_register_songposition_callback(MidiDevice* device, midi_three_byte_func_t func) { +    device->input_songposition_callback = func; +} + +void midi_register_progchange_callback(MidiDevice* device, midi_two_byte_func_t func) { +    device->input_progchange_callback = func; +} + +void midi_register_chanpressure_callback(MidiDevice* device, midi_two_byte_func_t func) { +    device->input_chanpressure_callback = func; +} + +void midi_register_songselect_callback(MidiDevice* device, midi_two_byte_func_t func) { +    device->input_songselect_callback = func; +} + +void midi_register_tc_quarterframe_callback(MidiDevice* device, midi_two_byte_func_t func) { +    device->input_tc_quarterframe_callback = func; +} + +void midi_register_realtime_callback(MidiDevice* device, midi_one_byte_func_t func) { +    device->input_realtime_callback = func; +} + +void midi_register_tunerequest_callback(MidiDevice* device, midi_one_byte_func_t func) { +    device->input_tunerequest_callback = func; +} + +void midi_register_sysex_callback(MidiDevice* device, midi_sysex_func_t func) { +    device->input_sysex_callback = func; +} + +void midi_register_fallthrough_callback(MidiDevice* device, midi_var_byte_func_t func) { +    device->input_fallthrough_callback = func; +} + +void midi_register_catchall_callback(MidiDevice* device, midi_var_byte_func_t func) { +    device->input_catchall_callback = func; +} | 
