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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/>.
#ifndef MIDI_DEVICE_H
#define MIDI_DEVICE_H
#include "midi_function_types.h"
#include "bytequeue.h"
#define MIDI_INPUT_QUEUE_LENGTH 16
typedef enum {
IDLE,
TWO_BYTE_MESSAGE = 2,
THREE_BYTE_MESSAGE = 3,
SYSEX_MESSAGE} input_state_t;
typedef void (* midi_no_byte_func_t)(MidiDevice * device);
//this structure represents the input and output functions and processing data
//for a midi device.
//A device can represent an actual physical device [serial port, usb port] or
//something virtual.
//You should not need to modify this structure directly.
struct _midi_device {
//output send function
midi_var_byte_func_t send_func;
//********input callbacks
//three byte funcs
midi_three_byte_func_t input_cc_callback;
midi_three_byte_func_t input_noteon_callback;
midi_three_byte_func_t input_noteoff_callback;
midi_three_byte_func_t input_aftertouch_callback;
midi_three_byte_func_t input_pitchbend_callback;
midi_three_byte_func_t input_songposition_callback;
//two byte funcs
midi_two_byte_func_t input_progchange_callback;
midi_two_byte_func_t input_chanpressure_callback;
midi_two_byte_func_t input_songselect_callback;
midi_two_byte_func_t input_tc_quaterframe_callback;
//one byte funcs
midi_one_byte_func_t input_realtime_callback;
midi_one_byte_func_t input_tunerequest_callback;
//only called if more specific callback is not matched
midi_var_byte_func_t input_fallthrough_callback;
//called if registered, independent of other callbacks
midi_var_byte_func_t input_catchall_callback;
//pre input processing function
midi_no_byte_func_t pre_input_process_callback;
//for internal input processing
uint8_t input_buffer[3];
input_state_t input_state;
uint8_t input_count;
//for queueing data between the input and the processing functions
uint8_t input_queue_data[MIDI_INPUT_QUEUE_LENGTH];
byteQueue_t input_queue;
};
//input processing, only used if you're creating a custom device
void midi_device_input(MidiDevice * device, uint8_t cnt, uint8_t byte0, uint8_t byte1, uint8_t byte2);
//set send function, only used if you're creating a custom device
//you'll most likely want the function that this calls to disable interrupts so
//that you can call the various midi send functions without worrying about
//locking.
void midi_device_set_send_func(MidiDevice * device, midi_var_byte_func_t send_func);
//if you need to run a function to grab input before you pass it to midi_device_input, set it here.
void midi_device_set_pre_input_process_func(MidiDevice * device, midi_no_byte_func_t pre_process_func);
#endif
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