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Add functionality to use files as MIDI data to send to simulated device

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This commit is contained in:
John Stäck 2019-08-05 14:11:25 +02:00
parent 3b405adebb
commit 4dbca53871
5 changed files with 91 additions and 66 deletions
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79
simulation/src/simusbmidi.cpp
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@ -1,8 +1,10 @@
#include <cstdint>
#include <cstdio>
#include <iostream>
#include <fstream>
#include "Arduino.h"
#include "simusbmidi.h"
/*************************************
* Stub simulation of Teensy usbMidi
@ -56,54 +58,41 @@ void SimUsbMidi::sendSysEx(uint16_t length, const uint8_t __unused *data, bool _
//Set a low chunk size on purpose just to let the receiver work for it
#define MIDI_SYSEX_CHUNK_SIZE 32
/* Test data for config mode
//Carefully crafted config command chunk to send via midi
static const uint8_t midimessage[] = {
0xf0, //Sysex start
0x00, 0x3e, 0x7f, //Vendor
'N', 'u', 'E', 'V', 'I', //header
'c', '0', '2', //message code
0, 102, //length
//Payload
0x00, 0x20, 0x7F, 0x7F, 0x7F, 0x7F, 0x7F, 0x7F, //00
0x7F, 0x7F, 0x7F, 0x7F, 0x7F, 0x7F, 0x06, 0x07, //08
0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, //10
0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, //18
0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, //20
0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, //28
0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, //30
0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, //38
0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, //40
0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, //48
0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, //50
0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, //58
0x00, 0x01, 0x02, 0x03, 0x04, 0x05, //60
0x2a, 0x11, 0x32, 0x5a, //crc32
0xf7 //sysex end marker
};
static bool midisent = false;
//On first midi read, send a message
bool SimUsbMidi::read(uint8_t __unused channel) {
if(!midisent) {
this->receiveMidiData(midimessage, sizeof(midimessage));
midisent=true;
if(this->sendMidi) {
printf("[SimUsbMidi::read] Attempting to send midi data\n");
std::ifstream file(this->midiFile, std::ios::binary | std::ios::ate);
std::streamsize size = file.tellg();
file.seekg(0, std::ios::beg);
uint8_t *buffer = (uint8_t*)malloc(size);
if (file.read((char*)buffer, size))
{
printf("[SimUsbMidi::read] Sending %lu bytes.\n", size);
this->receiveMidiData(buffer, size);
}
free(buffer);
this->sendMidi = false;
}
return false;
}
*/
bool SimUsbMidi::read(uint8_t __unused channel) {
return false;
}
//Provide midi data for simulation to receive
void SimUsbMidi::receiveMidiData(const uint8_t *data, const uint16_t length) {
if(length==0) return; //There is no data, what's even the point
uint8_t midi_message = data[0]; //First byte of data
if(midi_message != 0xF0) return; //Only sysex data supported (no other handlers available)
if(this->usb_midi_handleSysExPartial) {
//Chunked sysex receiver set, use that.
if(length<=MIDI_SYSEX_CHUNK_SIZE) {
@ -115,7 +104,7 @@ void SimUsbMidi::receiveMidiData(const uint8_t *data, const uint16_t length) {
int pos=0;
while(pos<length) {
int remaining = length-pos;
int bytesToSend = min(remaining, MIDI_SYSEX_CHUNK_SIZE);
int bytesToSend = std::min(remaining, MIDI_SYSEX_CHUNK_SIZE);
bool complete = (bytesToSend == remaining);
memcpy(buf, data+pos, bytesToSend);
@ -143,3 +132,11 @@ void SimUsbMidi::setHandleSystemExclusive(void (*fptr) (const uint8_t *array, un
void SimUsbMidi::setHandleSystemExclusive(void (*fptr) (const uint8_t *array, uint16_t size, bool last)) {
this->usb_midi_handleSysExPartial = (void (*)(const uint8_t *, uint16_t, uint8_t))fptr;
}
void SimUsbMidi::setMidiFile(std::string filename) {
this->midiFile = filename;
}
void SimUsbMidi::triggerMidi() {
this->sendMidi = true;
}