182 lines
7.7 KiB
C
182 lines
7.7 KiB
C
// 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
|
|
|
|
#define MIN(x, y) (((x) < (y)) ? (x) : (y))
|
|
|
|
#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; }
|