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#include <cstdio>
#include <fstream>
#include <iostream>
#include <map>
#include <sstream>
#include <string>
#include <vector>
struct Sample {
std::string name;
float freq, dur, amp, attack, harmonic_decay;
int harmonics;
};
struct Event {
float beat;
std::string sample_name;
float volume, pan;
};
struct Pattern {
std::string name;
std::vector<Event> events;
};
struct Trigger {
float time;
std::string pattern_name;
};
int main(int argc, char** argv) {
if (argc < 3) {
fprintf(stderr, "Usage: %s <input.track> <output.cc>\n", argv[0]);
return 1;
}
std::ifstream in(argv[1]);
if (!in.is_open()) {
fprintf(stderr, "Could not open input file: %s\n", argv[1]);
return 1;
}
float bpm = 120.0f;
std::vector<Sample> samples;
std::map<std::string, int> sample_map;
std::vector<Pattern> patterns;
std::map<std::string, int> pattern_map;
std::vector<Trigger> score;
std::string line;
std::string current_section = "";
while (std::getline(in, line)) {
if (line.empty() || line[0] == '#')
continue;
std::stringstream ss(line);
std::string cmd;
ss >> cmd;
if (cmd == "BPM") {
ss >> bpm;
} else if (cmd == "SAMPLE") {
Sample s;
std::string name;
ss >> name;
if (name.back() == ',')
name.pop_back();
s.name = name;
// Very simple parsing: freq, dur, amp, attack, harmonics, harmonic_decay
char comma;
ss >> s.freq >> comma >> s.dur >> comma >> s.amp >> comma >> s.attack >>
comma >> s.harmonics >> comma >> s.harmonic_decay;
sample_map[s.name] = samples.size();
samples.push_back(s);
} else if (cmd == "PATTERN") {
Pattern p;
ss >> p.name;
current_section = "PATTERN:" + p.name;
patterns.push_back(p);
pattern_map[p.name] = patterns.size() - 1;
} else if (cmd == "SCORE") {
current_section = "SCORE";
} else {
if (current_section.rfind("PATTERN:", 0) == 0) {
// Parse event: beat, sample, vol, pan
Event e;
float beat;
std::stringstream ss2(line);
ss2 >> beat;
char comma;
ss2 >> comma;
std::string sname;
ss2 >> sname;
if (sname.back() == ',')
sname.pop_back();
e.beat = beat;
e.sample_name = sname;
ss2 >> e.volume >> comma >> e.pan;
patterns.back().events.push_back(e);
} else if (current_section == "SCORE") {
Trigger t;
float time;
std::stringstream ss2(line);
ss2 >> time;
char comma;
ss2 >> comma;
std::string pname;
ss2 >> pname;
t.time = time;
t.pattern_name = pname;
score.push_back(t);
}
}
}
FILE* out_file = fopen(argv[2], "w");
if (!out_file) {
fprintf(stderr, "Could not open output file: %s\n", argv[2]);
return 1;
}
fprintf(out_file, "// Generated by tracker_compiler. Do not edit.\n\n");
fprintf(out_file, "#include \"audio/tracker.h\"\n\n");
fprintf(out_file, "const NoteParams g_tracker_samples[] = {\n");
for (const auto& s : samples) {
fprintf(out_file,
" { %.1ff, %.2ff, %.1ff, %.2ff, 0.0f, 0.0f, 0.0f, %d, %.1ff, "
"0.0f, 0.0f }, // %s\n",
s.freq, s.dur, s.amp, s.attack, s.harmonics, s.harmonic_decay,
s.name.c_str());
}
fprintf(out_file, "};\n");
fprintf(out_file, "const uint32_t g_tracker_samples_count = %zu;\n\n",
samples.size());
for (const auto& p : patterns) {
fprintf(out_file, "static const TrackerEvent PATTERN_EVENTS_%s[] = {\n",
p.name.c_str());
for (const auto& e : p.events) {
fprintf(out_file, " { %.1ff, %d, %.1ff, %.1ff },\n", e.beat,
sample_map[e.sample_name], e.volume, e.pan);
}
fprintf(out_file, "};\n");
}
fprintf(out_file, "\n");
fprintf(out_file, "const TrackerPattern g_tracker_patterns[] = {\n");
for (const auto& p : patterns) {
fprintf(out_file, " { PATTERN_EVENTS_%s, %zu, 4.0f }, // %s\n",
p.name.c_str(), p.events.size(), p.name.c_str());
}
fprintf(out_file, "};\n");
fprintf(out_file, "const uint32_t g_tracker_patterns_count = %zu;\n\n",
patterns.size());
fprintf(out_file,
"static const TrackerPatternTrigger SCORE_TRIGGERS[] = {\n");
for (const auto& t : score) {
fprintf(out_file, " { %.1ff, %d },\n", t.time,
pattern_map[t.pattern_name]);
}
fprintf(out_file, "};\n\n");
fprintf(out_file, "const TrackerScore g_tracker_score = {\n");
fprintf(out_file, " SCORE_TRIGGERS, %zu, %.1ff\n", score.size(), bpm);
fprintf(out_file, "};\n");
fclose(out_file);
return 0;
}
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