157 lines
5 KiB
C
Executable file
157 lines
5 KiB
C
Executable file
//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/>.
|
|
|
|
/**
|
|
* @file
|
|
* @brief Device implementation functions
|
|
*/
|
|
|
|
#ifndef MIDI_DEVICE_H
|
|
#define MIDI_DEVICE_H
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
/**
|
|
* @defgroup midi_device Functions used when implementing your own midi device.
|
|
*
|
|
* You use the functions when you are implementing your own midi device.
|
|
*
|
|
* You set a send function to actually send bytes via your device, this method
|
|
* is called when you call a send function with this device, for instance
|
|
* midi_send_cc
|
|
*
|
|
* You use the midi_device_input to process input data from the device and pass
|
|
* it through the device's associated callbacks.
|
|
*
|
|
* You use the midi_device_set_pre_input_process_func if you want to have a
|
|
* function called at the beginning of the device's process function, generally
|
|
* to poll for input and pass that into midi_device_input
|
|
*
|
|
* @{
|
|
*/
|
|
|
|
#include "midi_function_types.h"
|
|
#include "bytequeue/bytequeue.h"
|
|
#define MIDI_INPUT_QUEUE_LENGTH 192
|
|
|
|
typedef enum {
|
|
IDLE,
|
|
ONE_BYTE_MESSAGE = 1,
|
|
TWO_BYTE_MESSAGE = 2,
|
|
THREE_BYTE_MESSAGE = 3,
|
|
SYSEX_MESSAGE} input_state_t;
|
|
|
|
typedef void (* midi_no_byte_func_t)(MidiDevice * device);
|
|
|
|
/**
|
|
* \struct _midi_device
|
|
*
|
|
* @brief 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_quarterframe_callback;
|
|
//one byte funcs
|
|
midi_one_byte_func_t input_realtime_callback;
|
|
midi_one_byte_func_t input_tunerequest_callback;
|
|
|
|
//sysex
|
|
midi_sysex_func_t input_sysex_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;
|
|
uint16_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;
|
|
};
|
|
|
|
/**
|
|
* @brief Process input bytes. This function parses bytes and calls the
|
|
* appropriate callbacks associated with the given device. You use this
|
|
* function if you are creating a custom device and you want to have midi
|
|
* input.
|
|
*
|
|
* @param device the midi device to associate the input with
|
|
* @param cnt the number of bytes you are processing
|
|
* @param input the bytes to process
|
|
*/
|
|
void midi_device_input(MidiDevice * device, uint8_t cnt, uint8_t * input);
|
|
|
|
/**
|
|
* @brief Set the callback function that will be used for sending output
|
|
* data bytes. This is only used if you're creating a custom device.
|
|
* You'll most likely want the callback function to disable interrupts so
|
|
* that you can call the various midi send functions without worrying about
|
|
* locking.
|
|
*
|
|
* \param device the midi device to associate this callback with
|
|
* \param send_func the callback function that will do the sending
|
|
*/
|
|
void midi_device_set_send_func(MidiDevice * device, midi_var_byte_func_t send_func);
|
|
|
|
/**
|
|
* @brief Set a callback which is called at the beginning of the
|
|
* midi_device_process call. This can be used to poll for input
|
|
* data and send the data through the midi_device_input function.
|
|
* You'll probably only use this if you're creating a custom device.
|
|
*
|
|
* \param device the midi device to associate this callback with
|
|
* \param midi_no_byte_func_t the actual callback function
|
|
*/
|
|
void midi_device_set_pre_input_process_func(MidiDevice * device, midi_no_byte_func_t pre_process_func);
|
|
|
|
/**@}*/
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif
|