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-rw-r--r--quantum/midi/midi.c247
1 files changed, 247 insertions, 0 deletions
diff --git a/quantum/midi/midi.c b/quantum/midi/midi.c
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+++ b/quantum/midi/midi.c
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+// 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;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-22 10:57:04 +0000