musique/include/musique_internal.hh

64 lines
2.1 KiB
C++

#ifndef Musique_Internal_HH
#define Musique_Internal_HH
/// Binary operation may be vectorized when there are two argument which one is indexable and other is not
static inline bool may_be_vectorized(std::vector<Value> const& args)
{
return args.size() == 2 && (is_indexable(args[0].type) != is_indexable(args[1].type));
}
struct Interpreter::Incoming_Midi_Callbacks
{
Value note_on{};
Value note_off{};
inline Incoming_Midi_Callbacks() = default;
Incoming_Midi_Callbacks(Incoming_Midi_Callbacks &&) = delete;
Incoming_Midi_Callbacks(Incoming_Midi_Callbacks const&) = delete;
Incoming_Midi_Callbacks& operator=(Incoming_Midi_Callbacks &&) = delete;
Incoming_Midi_Callbacks& operator=(Incoming_Midi_Callbacks const&) = delete;
inline void add_callbacks(midi::Connection &midi, Interpreter &interpreter)
{
register_callback(midi.note_on_callback, note_on, interpreter);
register_callback(midi.note_off_callback, note_off, interpreter);
}
template<typename ...T>
inline void register_callback(std::function<void(T...)> &target, Value &callback, Interpreter &i)
{
if (&callback == &note_on || &callback == &note_off) {
// This messages have MIDI note number as second value, so they should be represented
// in our own note abstraction, not as numbers.
target = [interpreter = &i, callback = &callback](T ...source_args)
{
if (callback->type != Value::Type::Nil) {
std::vector<Value> args { Value::from(Number(source_args))... };
args[1] = Value::from(Chord { .notes { Note {
.base = i32(args[1].n.num % 12),
.octave = args[1].n.num / 12
}}});
auto result = (*callback)(*interpreter, std::move(args));
// We discard this since callback is running in another thread.
(void) result;
}
};
} else {
// Generic case, preserve all passed parameters as numbers
target = [interpreter = &i, callback = &callback](T ...source_args)
{
if (callback->type != Value::Type::Nil) {
auto result = (*callback)(*interpreter, { Value::from(Number(source_args))... });
// We discard this since callback is running in another thread.
(void) result;
}
};
}
}
};
#endif