User-defined input and port numbers of ALSA MIDI connection
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09f736bf83
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51
src/main.cc
51
src/main.cc
@ -34,14 +34,21 @@ static std::string_view pop(std::span<char const*> &span)
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"usage: musique <options> [filename]\n"
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" where filename is path to file with Musique code that will be executed\n"
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" where options are:\n"
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" -i,--input PORT\n"
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" provides input port, a place where Musique receives MIDI messages\n"
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" -o,--output PORT\n"
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" provides output port, a place where Musique produces MIDI messages\n"
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" -l,--list\n"
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" lists all available MIDI ports and quit\n"
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"\n"
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" -c,--run CODE\n"
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" executes given code\n"
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" -i,--interactive,--repl\n"
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" -I,--interactive,--repl\n"
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" enables interactive mode even when another code was passed\n"
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"\n"
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" --ast\n"
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" prints ast for given code\n"
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" -l,--list\n"
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" lists all available MIDI ports and quit\n";
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;
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std::exit(1);
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}
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@ -74,15 +81,19 @@ struct Runner
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Interpreter interpreter;
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/// Setup interpreter and midi connection with given port
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Runner(std::string port)
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Runner(std::string input_port, std::string output_port)
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: alsa("musique")
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{
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assert(the == nullptr, "Only one instance of runner is supported");
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the = this;
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alsa.init_sequencer();
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alsa.connect_output(port);
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interpreter.midi_connection = &alsa;
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bool const alsa_go = output_port.size() || input_port.size();
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if (alsa_go) {
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alsa.init_sequencer();
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interpreter.midi_connection = &alsa;
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}
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if (output_port.size()) alsa.connect_output(output_port);
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if (input_port.size()) alsa.connect_input(input_port);
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Env::global->force_define("say", +[](Interpreter&, std::vector<Value> args) -> Result<Value> {
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for (auto it = args.begin(); it != args.end(); ++it) {
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@ -147,6 +158,10 @@ static Result<void> Main(std::span<char const*> args)
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std::string_view argument;
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};
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// Arbitraly chosen for conviniance of the author
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std::string_view input_port{};
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std::string_view output_port{};
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std::vector<Run> runnables;
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while (not args.empty()) {
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@ -178,16 +193,34 @@ static Result<void> Main(std::span<char const*> args)
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continue;
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}
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if (arg == "--repl" || arg == "-i" || arg == "--interactive") {
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if (arg == "--repl" || arg == "-I" || arg == "--interactive") {
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enable_repl = true;
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continue;
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}
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if (arg == "-i" || arg == "--input") {
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if (args.empty()) {
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std::cerr << "musique: error: option " << arg << " requires an argument" << std::endl;
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std::exit(1);
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}
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input_port = pop(args);
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continue;
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}
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if (arg == "-o" || arg == "--output") {
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if (args.empty()) {
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std::cerr << "musique: error: option " << arg << " requires an argument" << std::endl;
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std::exit(1);
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}
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output_port = pop(args);
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continue;
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}
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std::cerr << "musique: error: unrecognized command line option: " << arg << std::endl;
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std::exit(1);
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}
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Runner runner("14");
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Runner runner{std::string(input_port), std::string(output_port)};
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for (auto const& [is_file, argument] : runnables) {
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if (!is_file) {
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