improved build process

.gitignore

@@ -1,3 +1,4 @@
 
 /midi-parser
+/build
 

CMakeLists.txt

@@ -0,0 +1,19 @@
+
+cmake_minimum_required(VERSION 3.30)
+
+project(midi-parser)
+
+set(CMAKE_CXX_STANDARD 26)
+set(CMAKE_CXX_FLAGS "-g")
+
+set(SRCS
+	src/main.cpp
+	src/device.cpp
+	src/key.cpp
+)
+
+add_subdirectory(midifile)
+add_executable(midi-parser ${SRCS})
+
+target_link_libraries(midi-parser PRIVATE midifile PUBLIC stdc++)
+

build.sh

@@ -1,6 +0,0 @@
-#!/bin/sh
-
-cd midifile && cmake . && make && cd ..
-
-g++ src/main.cpp ./midifile/libmidifile.a -o midi-parser -g -O3
-

src/device.cpp

@@ -0,0 +1,41 @@
+
+#include "device.hpp"
+
+#include <fcntl.h>
+#include <termios.h>
+#include <unistd.h>
+
+Device::Device(const char* path) {
+	fd = ::open(path, O_RDWR);
+}
+
+Device::~Device() {
+	::close(fd);
+}
+
+Device::operator int() {
+	return fd;
+}
+
+void Device::print(const char* data) {
+	for(size_t i = 0; data[i] != '\0'; i++) {
+		::write(fd, &data[i], 1);
+	}
+}
+
+void Device::write(const char* data, size_t len) {
+	::write(fd, data, len);
+}
+
+void Device::read(char* data, size_t len) {
+	::read(fd, data, len);
+}
+
+void Device::read_until(char target) {
+	char ch;
+	read(&ch, 1);
+	while(ch != target) {
+		read(&ch, 1);
+	}
+}
+

src/device.hpp

@@ -0,0 +1,26 @@
+
+#pragma once
+
+#include <cstddef>
+#include <cstdio>
+
+struct Device {
+	Device(const char* path);
+	~Device();
+	operator int();
+	void print(const char* data);
+	void write(const char* data, size_t len);
+	void read(char* data, size_t len);
+	void read_until(char target = '\n');
+
+	template<typename... Args>
+	void printf(const char* format, Args... args) {
+		char buff[1024];
+		size_t len = std::snprintf(buff, sizeof(buff), format, args...);
+		write(buff, len);
+	}
+
+private:
+	int fd;
+};
+

src/key.cpp

@@ -0,0 +1,12 @@
+
+#include "key.hpp"
+#include <cmath>
+#include <iterator>
+
+const double KEYS[] = {16.35, 17.32, 18.35, 19.45, 20.6, 21.83, 23.12, 24.5, 25.96, 27.5, 29.14, 30.87};
+
+int key::get_freq(int key) {
+	int octave = key / std::size(KEYS);
+	return (int)std::round(KEYS[key % std::size(KEYS)] * std::pow(2, octave));
+}
+

src/key.hpp

@@ -0,0 +1,8 @@
+
+#pragma once
+
+namespace key {
+
+	int get_freq(int key);
+};
+

src/main.cpp

@@ -3,34 +3,14 @@
 #include <cmath>
 #include <csignal>
 #include <cstring>
-#include <fstream>
-#include <iterator>
 #include <ostream>
-#include <thread>
 #include <iostream>
-#include <chrono>
 #include <vector>
-#include <fcntl.h>
+#include "device.hpp"
-#include <termios.h> 
+#include "key.hpp"
-
-const double KEYS[] = {16.35, 17.32, 18.35, 19.45, 20.6, 21.83, 23.12, 24.5, 25.96, 27.5, 29.14, 30.87};
-
-double get_key_freq(int key) {
-	int octave = key / std::size(KEYS);
-	return KEYS[key % std::size(KEYS)] * std::pow(2, octave);
-}
-
-volatile std::sig_atomic_t running = true;
-
-void signal_handler(int id) {
-	std::cout << "Quitting\n";
-	running = false;
-}
 
 int main(int argc, char** argv) {
 
-	std::signal(SIGINT, signal_handler);
-
 	smf::MidiFile midifile;
 	midifile.read(argv[2]);
 
@@ -54,16 +34,14 @@ int main(int argc, char** argv) {
 	midifile.doTimeAnalysis();
 	midifile.joinTracks();
 
-	std::ofstream device {argv[1], std::ios::binary};
+	Device device(argv[1]);
-	device << ":c,";
-	device.flush();
 	
 	auto& track = midifile[0];
 	int current_pressed_keys = 0;
 	int max_pressed_keys = 0;
 	double time_end = 0;
 
-	for(int i = 0; i < track.size() && running; i++) {
+	for(int i = 0; i < track.size(); i++) {
 		smf::MidiEvent& event = track[i];
 
 		if(!event.isNote()) {
@@ -89,11 +67,15 @@ int main(int argc, char** argv) {
 		}
 	}
 	
-	double amplitude = 1.0 / max_pressed_keys;
+	int tones_total = 0;
+	double amplitude = std::max(1.0 / max_pressed_keys, 1.0/16.0);
 	std::vector<int> channel_key_nums(max_pressed_keys, -1);
-	auto now = std::chrono::high_resolution_clock::now();
 
-	for(int i = 0; i < track.size() && running; i++) {
+	std::cout << "Seconds per tick: " << midifile.getTimeInSeconds(1) << std::endl;
+	
+	device.printf(":w,o,%f,%d,", amplitude, (int)(midifile.getTimeInSeconds(1) * 1000000));
+
+	for(int i = 0; i < track.size(); i++) {
 		smf::MidiEvent& event = track[i];
 
 		if(!event.isNote()) {
@@ -134,18 +116,14 @@ int main(int argc, char** argv) {
 		}
 end:
 
-		double key_freq = get_key_freq(key);
+		int key_freq = key::get_freq(key);
-
-		std::this_thread::sleep_until(now + std::chrono::duration<double>(event.seconds));
-		device << ":s," << channel << "," << key_freq << ',';
 
+		device.read_until();
 		if(event.isNoteOn()) {
-			device << std::max(amplitude, 1.0/16.0);
+			device.printf("s,%d,%d,%d,", event.tick, channel, key_freq);
 		} else {
-			device << '0';
+			device.printf("c,%d,%d,", event.tick, channel);
 		}
-		device << ',';
-		device.flush();
 
 		if(i < track.size() - 1 && event.seconds == track[i + 1].seconds) {
 			continue;
@@ -169,13 +147,15 @@ end:
 			}
 		}
 
-		std::cout << " + " << event.seconds << "s / " << time_end << "s" << std::endl;
+		std::cout << " + " << event.seconds << "s / " << time_end << 's' << std::endl;
+		tones_total++;
 	}
 
-	device << ":c,";
+	device.read_until();
-	device.flush();
+	device.printf(";,:p,");
+
+	std::cout << "Sent " << tones_total << " tones\n";
 
 	return 0;
 }
 
-