diff options
Diffstat (limited to 'protocol')
| -rwxr-xr-x | protocol/lufa/midi/bytequeue/COPYING | 674 | ||||
| -rwxr-xr-x | protocol/lufa/midi/bytequeue/bytequeue.c | 65 | ||||
| -rwxr-xr-x | protocol/lufa/midi/bytequeue/bytequeue.h | 59 | ||||
| -rwxr-xr-x | protocol/lufa/midi/bytequeue/interrupt_setting.c | 36 | ||||
| -rwxr-xr-x | protocol/lufa/midi/bytequeue/interrupt_setting.h | 39 | ||||
| -rwxr-xr-x | protocol/lufa/midi/midi.c | 277 | ||||
| -rwxr-xr-x | protocol/lufa/midi/midi.h | 498 | ||||
| -rwxr-xr-x | protocol/lufa/midi/midi_device.c | 291 | ||||
| -rwxr-xr-x | protocol/lufa/midi/midi_device.h | 156 | ||||
| -rwxr-xr-x | protocol/lufa/midi/midi_function_types.h | 50 | ||||
| -rwxr-xr-x | protocol/lufa/midi/sysex_tools.c | 99 | ||||
| -rwxr-xr-x | protocol/lufa/midi/sysex_tools.h | 95 |
12 files changed, 2339 insertions, 0 deletions
diff --git a/protocol/lufa/midi/bytequeue/COPYING b/protocol/lufa/midi/bytequeue/COPYING new file mode 100755 index 0000000000..94a9ed024d --- /dev/null +++ b/protocol/lufa/midi/bytequeue/COPYING @@ -0,0 +1,674 @@ + GNU GENERAL PUBLIC LICENSE + Version 3, 29 June 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/> + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU General Public License is a free, copyleft license for +software and other kinds of works. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. By contrast, +the GNU General Public License is intended to guarantee your freedom to +share and change all versions of a program--to make sure it remains free +software for all its users. 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If not, see <http://www.gnu.org/licenses/>. + +Also add information on how to contact you by electronic and paper mail. + + If the program does terminal interaction, make it output a short +notice like this when it starts in an interactive mode: + + <program> Copyright (C) <year> <name of author> + This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. + This is free software, and you are welcome to redistribute it + under certain conditions; type `show c' for details. + +The hypothetical commands `show w' and `show c' should show the appropriate +parts of the General Public License. Of course, your program's commands +might be different; for a GUI interface, you would use an "about box". + + You should also get your employer (if you work as a programmer) or school, +if any, to sign a "copyright disclaimer" for the program, if necessary. +For more information on this, and how to apply and follow the GNU GPL, see +<http://www.gnu.org/licenses/>. + + The GNU General Public License does not permit incorporating your program +into proprietary programs. If your program is a subroutine library, you +may consider it more useful to permit linking proprietary applications with +the library. If this is what you want to do, use the GNU Lesser General +Public License instead of this License. But first, please read +<http://www.gnu.org/philosophy/why-not-lgpl.html>. diff --git a/protocol/lufa/midi/bytequeue/bytequeue.c b/protocol/lufa/midi/bytequeue/bytequeue.c new file mode 100755 index 0000000000..e434956328 --- /dev/null +++ b/protocol/lufa/midi/bytequeue/bytequeue.c @@ -0,0 +1,65 @@ +//this is a single reader [maybe multiple writer?] byte queue +//Copyright 2008 Alex Norman +//writen by Alex Norman +// +//This file is part of avr-bytequeue. +// +//avr-bytequeue 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-bytequeue 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-bytequeue. If not, see <http://www.gnu.org/licenses/>. + +#include "bytequeue.h" +#include "interrupt_setting.h" + +void bytequeue_init(byteQueue_t * queue, uint8_t * dataArray, byteQueueIndex_t arrayLen){ + queue->length = arrayLen; + queue->data = dataArray; + queue->start = queue->end = 0; +} + +bool bytequeue_enqueue(byteQueue_t * queue, uint8_t item){ + interrupt_setting_t setting = store_and_clear_interrupt(); + //full + if(((queue->end + 1) % queue->length) == queue->start){ + restore_interrupt_setting(setting); + return false; + } else { + queue->data[queue->end] = item; + queue->end = (queue->end + 1) % queue->length; + restore_interrupt_setting(setting); + return true; + } +} + +byteQueueIndex_t bytequeue_length(byteQueue_t * queue){ + byteQueueIndex_t len; + interrupt_setting_t setting = store_and_clear_interrupt(); + if(queue->end >= queue->start) + len = queue->end - queue->start; + else + len = (queue->length - queue->start) + queue->end; + restore_interrupt_setting(setting); + return len; +} + +//we don't need to avoid interrupts if there is only one reader +uint8_t bytequeue_get(byteQueue_t * queue, byteQueueIndex_t index){ + return queue->data[(queue->start + index) % queue->length]; +} + +//we just update the start index to remove elements +void bytequeue_remove(byteQueue_t * queue, byteQueueIndex_t numToRemove){ + interrupt_setting_t setting = store_and_clear_interrupt(); + queue->start = (queue->start + numToRemove) % queue->length; + restore_interrupt_setting(setting); +} + diff --git a/protocol/lufa/midi/bytequeue/bytequeue.h b/protocol/lufa/midi/bytequeue/bytequeue.h new file mode 100755 index 0000000000..e4a286134f --- /dev/null +++ b/protocol/lufa/midi/bytequeue/bytequeue.h @@ -0,0 +1,59 @@ +//this is a single reader [maybe multiple writer?] byte queue +//Copyright 2008 Alex Norman +//writen by Alex Norman +// +//This file is part of avr-bytequeue. +// +//avr-bytequeue 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-bytequeue 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-bytequeue. If not, see <http://www.gnu.org/licenses/>. + +#ifndef BYTEQUEUE_H +#define BYTEQUEUE_H + +#ifdef __cplusplus +extern "C" { +#endif + +#include <inttypes.h> +#include <stdbool.h> + +typedef uint8_t byteQueueIndex_t; + +typedef struct { + byteQueueIndex_t start; + byteQueueIndex_t end; + byteQueueIndex_t length; + uint8_t * data; +} byteQueue_t; + +//you must have a queue, an array of data which the queue will use, and the length of that array +void bytequeue_init(byteQueue_t * queue, uint8_t * dataArray, byteQueueIndex_t arrayLen); + +//add an item to the queue, returns false if the queue is full +bool bytequeue_enqueue(byteQueue_t * queue, uint8_t item); + +//get the length of the queue +byteQueueIndex_t bytequeue_length(byteQueue_t * queue); + +//this grabs data at the index given [starting at queue->start] +uint8_t bytequeue_get(byteQueue_t * queue, byteQueueIndex_t index); + +//update the index in the queue to reflect data that has been dealt with +void bytequeue_remove(byteQueue_t * queue, byteQueueIndex_t numToRemove); + +#ifdef __cplusplus +} +#endif + +#endif + diff --git a/protocol/lufa/midi/bytequeue/interrupt_setting.c b/protocol/lufa/midi/bytequeue/interrupt_setting.c new file mode 100755 index 0000000000..eafef527c0 --- /dev/null +++ b/protocol/lufa/midi/bytequeue/interrupt_setting.c @@ -0,0 +1,36 @@ +//Copyright 20010 Alex Norman +//writen by Alex Norman +// +//This file is part of avr-bytequeue. +// +//avr-bytequeue 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-bytequeue 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-bytequeue. If not, see <http://www.gnu.org/licenses/>. + + +//AVR specific code +//should be able to port to other systems by simply providing chip specific +//implementations of the typedef and these functions + +#include "interrupt_setting.h" +#include <avr/interrupt.h> + +interrupt_setting_t store_and_clear_interrupt(void) { + uint8_t sreg = SREG; + cli(); + return sreg; +} + +void restore_interrupt_setting(interrupt_setting_t setting) { + SREG = setting; +} + diff --git a/protocol/lufa/midi/bytequeue/interrupt_setting.h b/protocol/lufa/midi/bytequeue/interrupt_setting.h new file mode 100755 index 0000000000..053d02c9d0 --- /dev/null +++ b/protocol/lufa/midi/bytequeue/interrupt_setting.h @@ -0,0 +1,39 @@ +//Copyright 20010 Alex Norman +//writen by Alex Norman +// +//This file is part of avr-bytequeue. +// +//avr-bytequeue 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-bytequeue 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-bytequeue. If not, see <http://www.gnu.org/licenses/>. + +#ifndef INTERRUPT_SETTING_H +#define INTERRUPT_SETTING_H + +#ifdef __cplusplus +extern "C" { +#endif + +#include <inttypes.h> + +//AVR specific typedef +typedef uint8_t interrupt_setting_t; + +interrupt_setting_t store_and_clear_interrupt(void); +void restore_interrupt_setting(interrupt_setting_t setting); + +#ifdef __cplusplus +} +#endif + +#endif + diff --git a/protocol/lufa/midi/midi.c b/protocol/lufa/midi/midi.c new file mode 100755 index 0000000000..11a589078c --- /dev/null +++ b/protocol/lufa/midi/midi.c @@ -0,0 +1,277 @@ +//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; +} + diff --git a/protocol/lufa/midi/midi.h b/protocol/lufa/midi/midi.h new file mode 100755 index 0000000000..1a36737df8 --- /dev/null +++ b/protocol/lufa/midi/midi.h @@ -0,0 +1,498 @@ +//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 The main midi functions + * + * This file includes all of the functions you need to set up and process a + * midi device, send midi, and register midi callbacks. + * + */ + +#ifndef XNOR_MIDI_H +#define XNOR_MIDI_H + +#ifdef __cplusplus +extern "C" { +#endif + +#include "midi_device.h" +#include "midi_function_types.h" + +/** + * @defgroup midi_device_setup_process Device initialization and processing + * @brief These are method that you must use to initialize and run a device + * + * @{ + */ + +/** + * @brief Initialize a device + * + * You must call this before using the device in question. + * + * @param device the device to initialize +*/ +void midi_device_init(MidiDevice * device); // [implementation in midi_device.c] + +/** + * @brief Process input data + * + * This method drives the input processing, you must call this method frequently + * if you expect to have your input callbacks called. + * + * @param device the device to process +*/ +void midi_device_process(MidiDevice * device); // [implementation in midi_device.c] + +/**@}*/ + +/** + * @defgroup send_functions Midi send functions + * @brief These are the functions you use to send midi data through a device. + * @{ + */ + +/** + * @brief Send a control change message (cc) via the given device. + * + * @param device the device to use for sending + * @param chan the channel to send on, 0-15 + * @param num the cc num + * @param val the value of that cc num +*/ +void midi_send_cc(MidiDevice * device, uint8_t chan, uint8_t num, uint8_t val); + +/** + * @brief Send a note on message via the given device. + * + * @param device the device to use for sending + * @param chan the channel to send on, 0-15 + * @param num the note number + * @param vel the note velocity +*/ +void midi_send_noteon(MidiDevice * device, uint8_t chan, uint8_t num, uint8_t vel); + +/** + * @brief Send a note off message via the given device. + * + * @param device the device to use for sending + * @param chan the channel to send on, 0-15 + * @param num the note number + * @param vel the note velocity +*/ +void midi_send_noteoff(MidiDevice * device, uint8_t chan, uint8_t num, uint8_t vel); + +/** + * @brief Send an after touch message via the given device. + * + * @param device the device to use for sending + * @param chan the channel to send on, 0-15 + * @param note_num the note number + * @param amt the after touch amount +*/ +void midi_send_aftertouch(MidiDevice * device, uint8_t chan, uint8_t note_num, uint8_t amt); + +/** + * @brief Send a pitch bend message via the given device. + * + * @param device the device to use for sending + * @param chan the channel to send on, 0-15 + * @param amt the bend amount range: -8192..8191, 0 means no bend +*/ +void midi_send_pitchbend(MidiDevice * device, uint8_t chan, int16_t amt); //range -8192, 8191 + +/** + * @brief Send a program change message via the given device. + * + * @param device the device to use for sending + * @param chan the channel to send on, 0-15 + * @param num the program to change to +*/ +void midi_send_programchange(MidiDevice * device, uint8_t chan, uint8_t num); + +/** + * @brief Send a channel pressure message via the given device. + * + * @param device the device to use for sending + * @param chan the channel to send on, 0-15 + * @param amt the amount of channel pressure +*/ +void midi_send_channelpressure(MidiDevice * device, uint8_t chan, uint8_t amt); + +/** + * @brief Send a clock message via the given device. + * + * @param device the device to use for sending + */ +void midi_send_clock(MidiDevice * device); + +/** + * @brief Send a tick message via the given device. + * + * @param device the device to use for sending + */ +void midi_send_tick(MidiDevice * device); + +/** + * @brief Send a start message via the given device. + * + * @param device the device to use for sending + */ +void midi_send_start(MidiDevice * device); + +/** + * @brief Send a continue message via the given device. + * + * @param device the device to use for sending + */ +void midi_send_continue(MidiDevice * device); + +/** + * @brief Send a stop message via the given device. + * + * @param device the device to use for sending + */ +void midi_send_stop(MidiDevice * device); + +/** + * @brief Send an active sense message via the given device. + * + * @param device the device to use for sending + */ +void midi_send_activesense(MidiDevice * device); + +/** + * @brief Send a reset message via the given device. + * + * @param device the device to use for sending + */ +void midi_send_reset(MidiDevice * device); + + +/** + * @brief Send a tc quarter frame message via the given device. + * + * @param device the device to use for sending + * @param time the time of this quarter frame, range 0..16383 + */ +void midi_send_tcquarterframe(MidiDevice * device, uint8_t time); + +/** + * @brief Send a song position message via the given device. + * + * @param device the device to use for sending + * @param pos the song position + */ +void midi_send_songposition(MidiDevice * device, uint16_t pos); + +/** + * @brief Send a song select message via the given device. + * + * @param device the device to use for sending + * @param song the song to select + */ +void midi_send_songselect(MidiDevice * device, uint8_t song); + +/** + * @brief Send a tune request message via the given device. + * + * @param device the device to use for sending + */ +void midi_send_tunerequest(MidiDevice * device); + +/** + * @brief Send a byte via the given device. + * + * This is a generic method for sending data via the given midi device. + * This would be useful for sending sysex data or messages that are not + * implemented in this API, if there are any. Please contact the author + * if you find some so we can add them. + * + * @param device the device to use for sending + * @param b the byte to send + */ +void midi_send_byte(MidiDevice * device, uint8_t b); + +/** + * @brief Send up to 3 bytes of data + * + * % 4 is applied to count so that you can use this to pass sysex through + * + * @param device the device to use for sending + * @param count the count of bytes to send, %4 is applied + * @param byte0 the first byte + * @param byte1 the second byte, ignored if cnt % 4 != 2 + * @param byte2 the third byte, ignored if cnt % 4 != 3 + */ +void midi_send_data(MidiDevice * device, uint16_t count, uint8_t byte0, uint8_t byte1, uint8_t byte2); + +/** + * @brief Send an array of formatted midi data. + * + * Can be used for sysex. + * + * @param device the device to use for sending + * @param count the count of bytes to send + * @param array the array of bytes + */ +void midi_send_array(MidiDevice * device, uint16_t count, uint8_t * array); + +/**@}*/ + + +/** + * @defgroup input_callback_reg Input callback registration functions + * + * @brief These are the functions you use to register your input callbacks. + * + * The functions are called when the appropriate midi message is matched on the + * associated device's input. + * + * @{ + */ + +//three byte funcs + +/** + * @brief Register a control change message (cc) callback. + * + * @param device the device associate with + * @param func the callback function to register + */ +void midi_register_cc_callback(MidiDevice * device, midi_three_byte_func_t func); + +/** + * @brief Register a note on callback. + * + * @param device the device associate with + * @param func the callback function to register + */ +void midi_register_noteon_callback(MidiDevice * device, midi_three_byte_func_t func); + +/** + * @brief Register a note off callback. + * + * @param device the device associate with + * @param func the callback function to register + */ +void midi_register_noteoff_callback(MidiDevice * device, midi_three_byte_func_t func); + +/** + * @brief Register an after touch callback. + * + * @param device the device associate with + * @param func the callback function to register + */ + +void midi_register_aftertouch_callback(MidiDevice * device, midi_three_byte_func_t func); + +/** + * @brief Register a pitch bend callback. + * + * @param device the device associate with + * @param func the callback function to register + */ +void midi_register_pitchbend_callback(MidiDevice * device, midi_three_byte_func_t func); + +/** + * @brief Register a song position callback. + * + * @param device the device associate with + * @param func the callback function to register + */ +void midi_register_songposition_callback(MidiDevice * device, midi_three_byte_func_t func); + +//two byte funcs + +/** + * @brief Register a program change callback. + * + * @param device the device associate with + * @param func the callback function to register + */ +void midi_register_progchange_callback(MidiDevice * device, midi_two_byte_func_t func); + +/** + * @brief Register a channel pressure callback. + * + * @param device the device associate with + * @param func the callback function to register + */ +void midi_register_chanpressure_callback(MidiDevice * device, midi_two_byte_func_t func); + +/** + * @brief Register a song select callback. + * + * @param device the device associate with + * @param func the callback function to register + */ +void midi_register_songselect_callback(MidiDevice * device, midi_two_byte_func_t func); + +/** + * @brief Register a tc quarter frame callback. + * + * @param device the device associate with + * @param func the callback function to register + */ +void midi_register_tc_quarterframe_callback(MidiDevice * device, midi_two_byte_func_t func); + +//one byte funcs + +/** + * @brief Register a realtime callback. + * + * The callback will be called for all of the real time message types. + * + * @param device the device associate with + * @param func the callback function to register + */ +void midi_register_realtime_callback(MidiDevice * device, midi_one_byte_func_t func); + +/** + * @brief Register a tune request callback. + * + * @param device the device associate with + * @param func the callback function to register + */ +void midi_register_tunerequest_callback(MidiDevice * device, midi_one_byte_func_t func); + +/** + * @brief Register a sysex callback. + * + * @param device the device associate with + * @param func the callback function to register + */ +void midi_register_sysex_callback(MidiDevice * device, midi_sysex_func_t func); + +/** + * @brief Register fall through callback. + * + * This is only called if a more specific callback is not matched and called. + * For instance, if you don't register a note on callback but you get a note on message + * the fall through callback will be called, if it is registered. + * + * @param device the device associate with + * @param func the callback function to register + */ +void midi_register_fallthrough_callback(MidiDevice * device, midi_var_byte_func_t func); + + +/** + * @brief Register a catch all callback. + * + * If registered, the catch all callback is called for every message that is + * matched, even if a more specific or the fallthrough callback is registered. + * + * @param device the device associate with + * @param func the callback function to register + */ +void midi_register_catchall_callback(MidiDevice * device, midi_var_byte_func_t func); + +/**@}*/ + +/** + * @defgroup midi_util Device independent utility functions. + * @{ + */ + +/** + * \enum midi_packet_length_t + * + * An enumeration of the possible packet length values. + */ +typedef enum { + UNDEFINED = 0, + ONE = 1, + TWO = 2, + THREE = 3} midi_packet_length_t; + +/** + * @brief Test to see if the byte given is a status byte + * @param theByte the byte to test + * @return true if the byte given is a midi status byte + */ +bool midi_is_statusbyte(uint8_t theByte); + +/** + * @brief Test to see if the byte given is a realtime message + * @param theByte the byte to test + * @return true if it is a realtime message, false otherwise + */ +bool midi_is_realtime(uint8_t theByte); + +/** + * @brief Find the length of the packet associated with the status byte given + * @param status the status byte + * @return the length of the packet, will return UNDEFINED if the byte is not + * a status byte or if it is a sysex status byte + */ +midi_packet_length_t midi_packet_length(uint8_t status); + +/**@}*/ + +/** + * @defgroup defines Midi status and miscellaneous utility #defines + * + * @{ + */ + +#define SYSEX_BEGIN 0xF0 +#define SYSEX_END 0xF7 + +//if you and this with a byte and you get anything non-zero +//it is a status message +#define MIDI_STATUSMASK 0x80 +//if you and this with a status message that contains channel info, +//you'll get the channel +#define MIDI_CHANMASK 0x0F + +#define MIDI_CC 0xB0 +#define MIDI_NOTEON 0x90 +#define MIDI_NOTEOFF 0x80 +#define MIDI_AFTERTOUCH 0xA0 +#define MIDI_PITCHBEND 0xE0 +#define MIDI_PROGCHANGE 0xC0 +#define MIDI_CHANPRESSURE 0xD0 + +//midi realtime +#define MIDI_CLOCK 0xF8 +#define MIDI_TICK 0xF9 +#define MIDI_START 0xFA +#define MIDI_CONTINUE 0xFB +#define MIDI_STOP 0xFC +#define MIDI_ACTIVESENSE 0xFE +#define MIDI_RESET 0xFF + +#define MIDI_TC_QUARTERFRAME 0xF1 +#define MIDI_SONGPOSITION 0xF2 +#define MIDI_SONGSELECT 0xF3 +#define MIDI_TUNEREQUEST 0xF6 + +//This ID is for educational or development use only +#define SYSEX_EDUMANUFID 0x7D + +/**@}*/ + +#ifdef __cplusplus +} +#endif + +#endif + diff --git a/protocol/lufa/midi/midi_device.c b/protocol/lufa/midi/midi_device.c new file mode 100755 index 0000000000..3215a007d5 --- /dev/null +++ b/protocol/lufa/midi/midi_device.c @@ -0,0 +1,291 @@ +//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_device.h" +#include "midi.h" + +#ifndef NULL +#define NULL 0 +#endif + +//forward declarations, internally used to call the callbacks +void midi_input_callbacks(MidiDevice * device, uint16_t cnt, uint8_t byte0, uint8_t byte1, uint8_t byte2); +void midi_process_byte(MidiDevice * device, uint8_t input); + +void midi_device_init(MidiDevice * device){ + device->input_state = IDLE; + device->input_count = 0; + bytequeue_init(&device->input_queue, device->input_queue_data, MIDI_INPUT_QUEUE_LENGTH); + + //three byte funcs + device->input_cc_callback = NULL; + device->input_noteon_callback = NULL; + device->input_noteoff_callback = NULL; + device->input_aftertouch_callback = NULL; + device->input_pitchbend_callback = NULL; + device->input_songposition_callback = NULL; + + //two byte funcs + device->input_progchange_callback = NULL; + device->input_chanpressure_callback = NULL; + device->input_songselect_callback = NULL; + device->input_tc_quarterframe_callback = NULL; + + //one byte funcs + device->input_realtime_callback = NULL; + device->input_tunerequest_callback = NULL; + + //var byte functions + device->input_sysex_callback = NULL; + device->input_fallthrough_callback = NULL; + device->input_catchall_callback = NULL; + + device->pre_input_process_callback = NULL; +} + +void midi_device_input(MidiDevice * device, uint8_t cnt, uint8_t * input) { + uint8_t i; + for (i = 0; i < cnt; i++) + bytequeue_enqueue(&device->input_queue, input[i]); +} + +void midi_device_set_send_func(MidiDevice * device, midi_var_byte_func_t send_func){ + device->send_func = send_func; +} + +void midi_device_set_pre_input_process_func(MidiDevice * device, midi_no_byte_func_t pre_process_func){ + device->pre_input_process_callback = pre_process_func; +} + +void midi_device_process(MidiDevice * device) { + //call the pre_input_process_callback if there is one + if(device->pre_input_process_callback) + device->pre_input_process_callback(device); + + //pull stuff off the queue and process + byteQueueIndex_t len = bytequeue_length(&device->input_queue); + uint16_t i; + //TODO limit number of bytes processed? + for(i = 0; i < len; i++) { + uint8_t val = bytequeue_get(&device->input_queue, 0); + midi_process_byte(device, val); + bytequeue_remove(&device->input_queue, 1); + } +} + +void midi_process_byte(MidiDevice * device, uint8_t input) { + if (midi_is_realtime(input)) { + //call callback, store and restore state + input_state_t state = device->input_state; + device->input_state = ONE_BYTE_MESSAGE; + midi_input_callbacks(device, 1, input, 0, 0); + device->input_state = state; + } else if (midi_is_statusbyte(input)) { + //store the byte + if (device->input_state != SYSEX_MESSAGE) { + device->input_buffer[0] = input; + device->input_count = 1; + } + switch (midi_packet_length(input)) { + case ONE: + device->input_state = ONE_BYTE_MESSAGE;; + midi_input_callbacks(device, 1, input, 0, 0); + device->input_state = IDLE; + break; + case TWO: + device->input_state = TWO_BYTE_MESSAGE; + break; + case THREE: + device->input_state = THREE_BYTE_MESSAGE; + break; + case UNDEFINED: + switch(input) { + case SYSEX_BEGIN: + device->input_state = SYSEX_MESSAGE; + device->input_buffer[0] = input; + device->input_count = 1; + break; + case SYSEX_END: + //send what is left in the input buffer, set idle + device->input_buffer[device->input_count % 3] = input; + device->input_count += 1; + //call the callback + midi_input_callbacks(device, device->input_count, + device->input_buffer[0], device->input_buffer[1], device->input_buffer[2]); + device->input_state = IDLE; + break; + default: + device->input_state = IDLE; + device->input_count = 0; + } + + break; + default: + device->input_state = IDLE; + device->input_count = 0; + break; + } + } else { + if (device->input_state != IDLE) { + //store the byte + device->input_buffer[device->input_count % 3] = input; + //increment count + uint16_t prev = device->input_count; + device->input_count += 1; + + switch(prev % 3) { + case 2: + //call callback + midi_input_callbacks(device, device->input_count, + device->input_buffer[0], device->input_buffer[1], device->input_buffer[2]); + if (device->input_state != SYSEX_MESSAGE) { + //set to 1, keeping status byte, allowing for running status + device->input_count = 1; + } + break; + case 1: + if (device->input_state == TWO_BYTE_MESSAGE) { + //call callback + midi_input_callbacks(device, device->input_count, + device->input_buffer[0], device->input_buffer[1], 0); + if (device->input_state != SYSEX_MESSAGE) { + //set to 1, keeping status byte, allowing for running status + device->input_count = 1; + } + } + break; + case 0: + default: + //one byte messages are dealt with directly + break; + } + } + } +} + +void midi_input_callbacks(MidiDevice * device, uint16_t cnt, uint8_t byte0, uint8_t byte1, uint8_t byte2) { + //did we end up calling a callback? + bool called = false; + if (device->input_state == SYSEX_MESSAGE) { + if (device->input_sysex_callback) { + const uint16_t start = ((cnt - 1) / 3) * 3; + const uint8_t length = (cnt - start); + uint8_t data[3]; + data[0] = byte0; + data[1] = byte1; + data[2] = byte2; + device->input_sysex_callback(device, start, length, data); + called = true; + } + } else { + switch (cnt) { + case 3: + { + midi_three_byte_func_t func = NULL; + switch (byte0 & 0xF0) { + case MIDI_CC: + func = device->input_cc_callback; + break; + case MIDI_NOTEON: + func = device->input_noteon_callback; + break; + case MIDI_NOTEOFF: + func = device->input_noteoff_callback; + break; + case MIDI_AFTERTOUCH: + func = device->input_aftertouch_callback; + break; + case MIDI_PITCHBEND: + func = device->input_pitchbend_callback; + break; + case 0xF0: + if (byte0 == MIDI_SONGPOSITION) + func = device->input_songposition_callback; + break; + default: + break; + } + if(func) { + //mask off the channel for non song position functions + if (byte0 == MIDI_SONGPOSITION) + func(device, byte0, byte1, byte2); + else + func(device, byte0 & 0x0F, byte1, byte2); + called = true; + } + } + break; + case 2: + { + midi_two_byte_func_t func = NULL; + switch (byte0 & 0xF0) { + case MIDI_PROGCHANGE: + func = device->input_progchange_callback; + break; + case MIDI_CHANPRESSURE: + func = device->input_chanpressure_callback; + break; + case 0xF0: + if (byte0 == MIDI_SONGSELECT) + func = device->input_songselect_callback; + else if (byte0 == MIDI_TC_QUARTERFRAME) + func = device->input_tc_quarterframe_callback; + break; + default: + break; + } + if(func) { + //mask off the channel + if (byte0 == MIDI_SONGSELECT || byte0 == MIDI_TC_QUARTERFRAME) + func(device, byte0, byte1); + else + func(device, byte0 & 0x0F, byte1); + called = true; + } + } + break; + case 1: + { + midi_one_byte_func_t func = NULL; + if (midi_is_realtime(byte0)) + func = device->input_realtime_callback; + else if (byte0 == MIDI_TUNEREQUEST) + func = device->input_tunerequest_callback; + if (func) { + func(device, byte0); + called = true; + } + } + break; + default: + //just in case + if (cnt > 3) + cnt = 0; + break; + } + } + + //if there is fallthrough default callback and we haven't called a more specific one, + //call the fallthrough + if (!called && device->input_fallthrough_callback) + device->input_fallthrough_callback(device, cnt, byte0, byte1, byte2); + //always call the catch all if it exists + if (device->input_catchall_callback) + device->input_catchall_callback(device, cnt, byte0, byte1, byte2); +} + diff --git a/protocol/lufa/midi/midi_device.h b/protocol/lufa/midi/midi_device.h new file mode 100755 index 0000000000..088995286c --- /dev/null +++ b/protocol/lufa/midi/midi_device.h @@ -0,0 +1,156 @@ +//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 diff --git a/protocol/lufa/midi/midi_function_types.h b/protocol/lufa/midi/midi_function_types.h new file mode 100755 index 0000000000..35c4601b20 --- /dev/null +++ b/protocol/lufa/midi/midi_function_types.h @@ -0,0 +1,50 @@ +//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 Function signature definitions + */ + +#ifndef MIDI_FUNCTION_TYPES_H +#define MIDI_FUNCTION_TYPES_H + +#ifdef __cplusplus +extern "C" { +#endif + +#include <inttypes.h> +#include <stdbool.h> + +//forward declaration +typedef struct _midi_device MidiDevice; + +typedef void (* midi_one_byte_func_t)(MidiDevice * device, uint8_t byte); +typedef void (* midi_two_byte_func_t)(MidiDevice * device, uint8_t byte0, uint8_t byte1); +typedef void (* midi_three_byte_func_t)(MidiDevice * device, uint8_t byte0, uint8_t byte1, uint8_t byte2); +//all bytes after count bytes should be ignored +typedef void (* midi_var_byte_func_t)(MidiDevice * device, uint16_t count, uint8_t byte0, uint8_t byte1, uint8_t byte2); + +//the start byte tells you how far into the sysex message you are, the data_length tells you how many bytes data is +typedef void (* midi_sysex_func_t)(MidiDevice * device, uint16_t start_byte, uint8_t data_length, uint8_t *data); + +#ifdef __cplusplus +} +#endif + +#endif diff --git a/protocol/lufa/midi/sysex_tools.c b/protocol/lufa/midi/sysex_tools.c new file mode 100755 index 0000000000..7563a3e2aa --- /dev/null +++ b/protocol/lufa/midi/sysex_tools.c @@ -0,0 +1,99 @@ +//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 "sysex_tools.h" + +uint16_t sysex_encoded_length(uint16_t decoded_length){ + uint8_t remainder = decoded_length % 7; + if (remainder) + return (decoded_length / 7) * 8 + remainder + 1; + else + return (decoded_length / 7) * 8; +} + +uint16_t sysex_decoded_length(uint16_t encoded_length){ + uint8_t remainder = encoded_length % 8; + if (remainder) + return (encoded_length / 8) * 7 + remainder - 1; + else + return (encoded_length / 8) * 7; +} + +uint16_t sysex_encode(uint8_t *encoded, const uint8_t *source, const uint16_t length){ + uint16_t encoded_full = length / 7; //number of full 8 byte sections from 7 bytes of input + uint16_t i,j; + + //fill out the fully encoded sections + for(i = 0; i < encoded_full; i++) { + uint16_t encoded_msb_idx = i * 8; + uint16_t input_start_idx = i * 7; + encoded[encoded_msb_idx] = 0; + for(j = 0; j < 7; j++){ + uint8_t current = source[input_start_idx + j]; + encoded[encoded_msb_idx] |= (0x80 & current) >> (1 + j); + encoded[encoded_msb_idx + 1 + j] = 0x7F & current; + } + } + + //fill out the rest if there is any more + uint8_t remainder = length % 7; + if (remainder) { + uint16_t encoded_msb_idx = encoded_full * 8; + uint16_t input_start_idx = encoded_full * 7; + encoded[encoded_msb_idx] = 0; + for(j = 0; j < remainder; j++){ + uint8_t current = source[input_start_idx + j]; + encoded[encoded_msb_idx] |= (0x80 & current) >> (1 + j); + encoded[encoded_msb_idx + 1 + j] = 0x7F & current; + } + return encoded_msb_idx + remainder + 1; + } else { + return encoded_full * 8; + } +} + +uint16_t sysex_decode(uint8_t *decoded, const uint8_t *source, const uint16_t length){ + uint16_t decoded_full = length / 8; + uint16_t i,j; + + if (length < 2) + return 0; + + //fill out the fully encoded sections + for(i = 0; i < decoded_full; i++) { + uint16_t encoded_msb_idx = i * 8; + uint16_t output_start_index = i * 7; + for(j = 0; j < 7; j++){ + decoded[output_start_index + j] = 0x7F & source[encoded_msb_idx + j + 1]; + decoded[output_start_index + j] |= (0x80 & (source[encoded_msb_idx] << (1 + j))); + } + } + uint8_t remainder = length % 8; + if (remainder) { + uint16_t encoded_msb_idx = decoded_full * 8; + uint16_t output_start_index = decoded_full * 7; + for(j = 0; j < (remainder - 1); j++) { + decoded[output_start_index + j] = 0x7F & source[encoded_msb_idx + j + 1]; + decoded[output_start_index + j] |= (0x80 & (source[encoded_msb_idx] << (1 + j))); + } + return decoded_full * 7 + remainder - 1; + } else { + return decoded_full * 7; + } +} + diff --git a/protocol/lufa/midi/sysex_tools.h b/protocol/lufa/midi/sysex_tools.h new file mode 100755 index 0000000000..3654d0114f --- /dev/null +++ b/protocol/lufa/midi/sysex_tools.h @@ -0,0 +1,95 @@ +//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 SYSEX_TOOLS_H +#define SYSEX_TOOLS_H + +#ifdef __cplusplus +extern "C" { +#endif + +#include <inttypes.h> + +/** + * @file + * @brief Sysex utility functions + * + * These functions are for converting data to and from a "midi-safe" format, + * which can be use to send data with sysex messages. Sysex messages may only + * contain data where the to bit is not set. + * + * An "encoded" midi message is one that contains all of the data from its + * original state, but does not have any of the top bits set. + * + * Every 7 bytes of decoded data is converted into 8 bytes of encoded data and + * visa-versa. If you'd like to operate on small segments, make sure that you + * encode in 7 byte increments and decode in 8 byte increments. + * + */ + +/** @defgroup sysex_tools Sysex utility functions + * @{ + */ + +/** + * @brief Compute the length of a message after it is encoded. + * + * @param decoded_length The length, in bytes, of the message to encode. + * + * @return The length, in bytes, of the message after encodeing. + */ +uint16_t sysex_encoded_length(uint16_t decoded_length); + +/** + * @brief Compute the length of a message after it is decoded. + * + * @param encoded_length The length, in bytes, of the encoded message. + * + * @return The length, in bytes, of the message after it is decoded. + */ +uint16_t sysex_decoded_length(uint16_t encoded_length); + +/** + * @brief Encode data so that it can be transmitted safely in a sysex message. + * + * @param encoded The output data buffer, must be at least sysex_encoded_length(length) bytes long. + * @param source The input buffer of data to be encoded. + * @param length The number of bytes from the input buffer to encode. + * + * @return number of bytes encoded. + */ +uint16_t sysex_encode(uint8_t *encoded, const uint8_t *source, uint16_t length); + +/** + * @brief Decode encoded data. + * + * @param decoded The output data buffer, must be at least sysex_decoded_length(length) bytes long. + * @param source The input buffer of data to be decoded. + * @param length The number of bytes from the input buffer to decode. + * + * @return number of bytes decoded. + */ +uint16_t sysex_decode(uint8_t *decoded, const uint8_t *source, uint16_t length); + +/**@}*/ + +#ifdef __cplusplus +} +#endif + +#endif |