123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277 |
- //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;
- }
|