merge upstream 713427c

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;
+}