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User-defined input and port numbers of ALSA MIDI connection

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This commit is contained in:
Robert Bendun 2022-06-18 00:28:48 +02:00
parent 09f736bf83
commit bf3f388acb
1 changed files with 42 additions and 9 deletions
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47
src/main.cc
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@ -34,14 +34,21 @@ static std::string_view pop(std::span<char const*> &span)
"usage: musique <options> [filename]\n" "usage: musique <options> [filename]\n"
" where filename is path to file with Musique code that will be executed\n" " where filename is path to file with Musique code that will be executed\n"
" where options are:\n" " where options are:\n"
" -i,--input PORT\n"
" provides input port, a place where Musique receives MIDI messages\n"
" -o,--output PORT\n"
" provides output port, a place where Musique produces MIDI messages\n"
" -l,--list\n"
" lists all available MIDI ports and quit\n"
"\n"
" -c,--run CODE\n" " -c,--run CODE\n"
" executes given code\n" " executes given code\n"
" -i,--interactive,--repl\n" " -I,--interactive,--repl\n"
" enables interactive mode even when another code was passed\n" " enables interactive mode even when another code was passed\n"
"\n"
" --ast\n" " --ast\n"
" prints ast for given code\n" " prints ast for given code\n"
" -l,--list\n" ;
" lists all available MIDI ports and quit\n";
std::exit(1); std::exit(1);
} }
@ -74,15 +81,19 @@ struct Runner
Interpreter interpreter; Interpreter interpreter;
/// Setup interpreter and midi connection with given port /// Setup interpreter and midi connection with given port
Runner(std::string port) Runner(std::string input_port, std::string output_port)
: alsa("musique") : alsa("musique")
{ {
assert(the == nullptr, "Only one instance of runner is supported"); assert(the == nullptr, "Only one instance of runner is supported");
the = this; the = this;
bool const alsa_go = output_port.size() || input_port.size();
if (alsa_go) {
alsa.init_sequencer(); alsa.init_sequencer();
alsa.connect_output(port);
interpreter.midi_connection = &alsa; interpreter.midi_connection = &alsa;
}
if (output_port.size()) alsa.connect_output(output_port);
if (input_port.size()) alsa.connect_input(input_port);
Env::global->force_define("say", +[](Interpreter&, std::vector<Value> args) -> Result<Value> { Env::global->force_define("say", +[](Interpreter&, std::vector<Value> args) -> Result<Value> {
for (auto it = args.begin(); it != args.end(); ++it) { for (auto it = args.begin(); it != args.end(); ++it) {
@ -147,6 +158,10 @@ static Result<void> Main(std::span<char const*> args)
std::string_view argument; std::string_view argument;
}; };
// Arbitraly chosen for conviniance of the author
std::string_view input_port{};
std::string_view output_port{};
std::vector<Run> runnables; std::vector<Run> runnables;
while (not args.empty()) { while (not args.empty()) {
@ -178,16 +193,34 @@ static Result<void> Main(std::span<char const*> args)
continue; continue;
} }
if (arg == "--repl" || arg == "-i" || arg == "--interactive") { if (arg == "--repl" || arg == "-I" || arg == "--interactive") {
enable_repl = true; enable_repl = true;
continue; continue;
} }
if (arg == "-i" || arg == "--input") {
if (args.empty()) {
std::cerr << "musique: error: option " << arg << " requires an argument" << std::endl;
std::exit(1);
}
input_port = pop(args);
continue;
}
if (arg == "-o" || arg == "--output") {
if (args.empty()) {
std::cerr << "musique: error: option " << arg << " requires an argument" << std::endl;
std::exit(1);
}
output_port = pop(args);
continue;
}
std::cerr << "musique: error: unrecognized command line option: " << arg << std::endl; std::cerr << "musique: error: unrecognized command line option: " << arg << std::endl;
std::exit(1); std::exit(1);
} }
Runner runner("14"); Runner runner{std::string(input_port), std::string(output_port)};
for (auto const& [is_file, argument] : runnables) { for (auto const& [is_file, argument] : runnables) {
if (!is_file) { if (!is_file) {