2 #define _MIDI_MAPPER_H 1
4 // MIDIMapper is a class that listens for incoming MIDI messages from
5 // mixer controllers (ie., it is not meant to be used with regular
6 // instruments), interprets them according to a device-specific, user-defined
7 // mapping, and calls back into a receiver (typically the MainWindow).
8 // This way, it is possible to control audio functionality using physical
9 // pots and faders instead of the mouse.
22 class MIDIMappingProto;
23 typedef struct snd_seq_addr snd_seq_addr_t;
24 typedef struct snd_seq_event snd_seq_event_t;
25 typedef struct _snd_seq snd_seq_t;
27 // Interface for receiving interpreted controller messages.
28 class ControllerReceiver {
30 // All values are [0.0, 1.0].
31 virtual void set_locut(float value) = 0;
32 virtual void set_limiter_threshold(float value) = 0;
33 virtual void set_makeup_gain(float value) = 0;
35 virtual void set_treble(unsigned bus_idx, float value) = 0;
36 virtual void set_mid(unsigned bus_idx, float value) = 0;
37 virtual void set_bass(unsigned bus_idx, float value) = 0;
38 virtual void set_gain(unsigned bus_idx, float value) = 0;
39 virtual void set_compressor_threshold(unsigned bus_idx, float value) = 0;
40 virtual void set_fader(unsigned bus_idx, float value) = 0;
42 virtual void toggle_mute(unsigned bus_idx) = 0;
43 virtual void toggle_locut(unsigned bus_idx) = 0;
44 virtual void toggle_auto_gain_staging(unsigned bus_idx) = 0;
45 virtual void toggle_compressor(unsigned bus_idx) = 0;
46 virtual void clear_peak(unsigned bus_idx) = 0;
47 virtual void toggle_limiter() = 0;
48 virtual void toggle_auto_makeup_gain() = 0;
50 // Signals to highlight controls to mark them to the user
51 // as MIDI-controllable (or not).
52 virtual void clear_all_highlights() = 0;
54 virtual void highlight_locut(bool highlight) = 0;
55 virtual void highlight_limiter_threshold(bool highlight) = 0;
56 virtual void highlight_makeup_gain(bool highlight) = 0;
58 virtual void highlight_treble(unsigned bus_idx, bool highlight) = 0;
59 virtual void highlight_mid(unsigned bus_idx, bool highlight) = 0;
60 virtual void highlight_bass(unsigned bus_idx, bool highlight) = 0;
61 virtual void highlight_gain(unsigned bus_idx, bool highlight) = 0;
62 virtual void highlight_compressor_threshold(unsigned bus_idx, bool highlight) = 0;
63 virtual void highlight_fader(unsigned bus_idx, bool highlight) = 0;
65 virtual void highlight_mute(unsigned bus_idx, bool highlight) = 0;
66 virtual void highlight_toggle_locut(unsigned bus_idx, bool highlight) = 0;
67 virtual void highlight_toggle_auto_gain_staging(unsigned bus_idx, bool highlight) = 0;
68 virtual void highlight_toggle_compressor(unsigned bus_idx, bool highlight) = 0;
69 virtual void highlight_clear_peak(unsigned bus_idx, bool highlight) = 0;
70 virtual void highlight_toggle_limiter(bool highlight) = 0;
71 virtual void highlight_toggle_auto_makeup_gain(bool highlight) = 0;
73 // Raw events; used for the editor dialog only.
74 virtual void controller_changed(unsigned controller) = 0;
75 virtual void note_on(unsigned note) = 0;
80 MIDIMapper(ControllerReceiver *receiver);
81 virtual ~MIDIMapper();
82 void set_midi_mapping(const MIDIMappingProto &new_mapping);
84 const MIDIMappingProto &get_current_mapping() const;
86 // Overwrites and returns the previous value.
87 ControllerReceiver *set_receiver(ControllerReceiver *new_receiver);
89 void refresh_highlights();
90 void refresh_lights();
92 void set_has_peaked(unsigned bus_idx, bool has_peaked)
94 this->has_peaked[bus_idx] = has_peaked;
99 void handle_event(snd_seq_t *seq, snd_seq_event_t *event);
100 void subscribe_to_port_lock_held(snd_seq_t *seq, const snd_seq_addr_t &addr);
101 void match_controller(int controller, int field_number, int bank_field_number, float value, std::function<void(unsigned, float)> func);
102 void match_button(int note, int field_number, int bank_field_number, std::function<void(unsigned)> func);
103 bool has_active_controller(unsigned bus_idx, int field_number, int bank_field_number); // Also works for buttons.
104 bool bank_mismatch(int bank_field_number);
106 void update_highlights();
108 void update_lights_lock_held();
109 void activate_lights(unsigned bus_idx, int field_number, std::set<unsigned> *active_lights);
110 void activate_lights_all_buses(int field_number, std::set<unsigned> *active_lights);
112 std::atomic<bool> should_quit{false};
115 std::atomic<bool> has_peaked[MAX_BUSES] {{ false }};
117 mutable std::mutex mu;
118 ControllerReceiver *receiver; // Under <mu>.
119 std::unique_ptr<MIDIMappingProto> mapping_proto; // Under <mu>.
120 int num_controller_banks; // Under <mu>.
121 std::atomic<int> current_controller_bank{0};
122 std::atomic<int> num_subscribed_ports{0};
124 std::thread midi_thread;
125 std::map<unsigned, bool> current_light_status; // Keyed by note number. Under <mu>.
126 snd_seq_t *alsa_seq{nullptr}; // Under <mu>.
127 int alsa_queue_id{-1}; // Under <mu>.
130 bool load_midi_mapping_from_file(const std::string &filename, MIDIMappingProto *new_mapping);
131 bool save_midi_mapping_to_file(const MIDIMappingProto &mapping_proto, const std::string &filename);
133 #endif // !defined(_MIDI_MAPPER_H)