git.sesse.net Git - nageru/blob - futatabi/midi_mapper.cpp

   1 #include "midi_mapper.h"
   2
   3 #include <alsa/asoundlib.h>
   4 #include <assert.h>
   5 #include <errno.h>
   6 #include <fcntl.h>
   7 #include <google/protobuf/descriptor.h>
   8 #include <google/protobuf/io/zero_copy_stream_impl.h>
   9 #include <google/protobuf/message.h>
  10 #include <google/protobuf/text_format.h>
  11 #include <pthread.h>
  12 #include <poll.h>
  13 #include <stdint.h>
  14 #include <stdio.h>
  15 #include <sys/eventfd.h>
  16 #include <unistd.h>
  17 #include <algorithm>
  18 #include <functional>
  19 #include <thread>
  20
  21 #include "defs.h"
  22 #include "futatabi_midi_mapping.pb.h"
  23 #include "shared/midi_mapper_util.h"
  24 #include "shared/text_proto.h"
  25
  26 using namespace google::protobuf;
  27 using namespace std;
  28 using namespace std::placeholders;
  29
  30 MIDIMapper::MIDIMapper(ControllerReceiver *receiver)
  31         : receiver(receiver), mapping_proto(new MIDIMappingProto), midi_device(this)
  32 {
  33 }
  34
  35 MIDIMapper::~MIDIMapper() {}
  36
  37 bool load_midi_mapping_from_file(const string &filename, MIDIMappingProto *new_mapping)
  38 {
  39         return load_proto_from_file(filename, new_mapping);
  40 }
  41
  42 bool save_midi_mapping_to_file(const MIDIMappingProto &mapping_proto, const string &filename)
  43 {
  44         return save_proto_to_file(mapping_proto, filename);
  45 }
  46
  47 void MIDIMapper::set_midi_mapping(const MIDIMappingProto &new_mapping)
  48 {
  49         lock_guard<mutex> lock(mu);
  50         if (mapping_proto) {
  51                 mapping_proto->CopyFrom(new_mapping);
  52         } else {
  53                 mapping_proto.reset(new MIDIMappingProto(new_mapping));
  54         }
  55
  56         num_controller_banks = min(max(mapping_proto->num_controller_banks(), 1), 5);
  57         current_controller_bank = 0;
  58 }
  59
  60 void MIDIMapper::start_thread()
  61 {
  62         midi_device.start_thread();
  63 }
  64
  65 const MIDIMappingProto &MIDIMapper::get_current_mapping() const
  66 {
  67         lock_guard<mutex> lock(mu);
  68         return *mapping_proto;
  69 }
  70
  71 ControllerReceiver *MIDIMapper::set_receiver(ControllerReceiver *new_receiver)
  72 {
  73         lock_guard<mutex> lock(mu);
  74         swap(receiver, new_receiver);
  75         return new_receiver;  // Now old receiver.
  76 }
  77
  78 void MIDIMapper::controller_received(int controller, int value_int)
  79 {
  80         int delta_value = value_int - 64;  // For infinite controllers such as jog.
  81
  82         receiver->controller_changed(controller);
  83
  84         match_controller(controller, MIDIMappingProto::kJogFieldNumber, MIDIMappingProto::kJogBankFieldNumber,
  85                 delta_value, bind(&ControllerReceiver::jog, receiver, _1));
  86 }
  87
  88 void MIDIMapper::note_on_received(int note)
  89 {
  90         lock_guard<mutex> lock(mu);
  91         receiver->note_on(note);
  92
  93         if (mapping_proto->has_prev_bank() &&
  94             mapping_proto->prev_bank().note_number() == note) {
  95                 current_controller_bank = (current_controller_bank + num_controller_banks - 1) % num_controller_banks;
  96                 update_lights_lock_held();
  97         }
  98         if (mapping_proto->has_next_bank() &&
  99             mapping_proto->next_bank().note_number() == note) {
 100                 current_controller_bank = (current_controller_bank + 1) % num_controller_banks;
 101                 update_lights_lock_held();
 102         }
 103         if (mapping_proto->has_select_bank_1() &&
 104             mapping_proto->select_bank_1().note_number() == note) {
 105                 current_controller_bank = 0;
 106                 update_lights_lock_held();
 107         }
 108         if (mapping_proto->has_select_bank_2() &&
 109             mapping_proto->select_bank_2().note_number() == note &&
 110             num_controller_banks >= 2) {
 111                 current_controller_bank = 1;
 112                 update_lights_lock_held();
 113         }
 114         if (mapping_proto->has_select_bank_3() &&
 115             mapping_proto->select_bank_3().note_number() == note &&
 116             num_controller_banks >= 3) {
 117                 current_controller_bank = 2;
 118                 update_lights_lock_held();
 119         }
 120         if (mapping_proto->has_select_bank_4() &&
 121             mapping_proto->select_bank_4().note_number() == note &&
 122             num_controller_banks >= 4) {
 123                 current_controller_bank = 3;
 124                 update_lights_lock_held();
 125         }
 126         if (mapping_proto->has_select_bank_5() &&
 127             mapping_proto->select_bank_5().note_number() == note &&
 128             num_controller_banks >= 5) {
 129                 current_controller_bank = 4;
 130                 update_lights_lock_held();
 131         }
 132
 133         match_button(note, MIDIMappingProto::kPreviewFieldNumber, MIDIMappingProto::kPreviewBankFieldNumber,
 134                 bind(&ControllerReceiver::preview, receiver));
 135         match_button(note, MIDIMappingProto::kQueueFieldNumber, MIDIMappingProto::kQueueBankFieldNumber,
 136                 bind(&ControllerReceiver::queue, receiver));
 137         match_button(note, MIDIMappingProto::kPlayFieldNumber, MIDIMappingProto::kPlayBankFieldNumber,
 138                 bind(&ControllerReceiver::play, receiver));
 139
 140         unsigned num_cameras = std::min(MAX_STREAMS, mapping_proto->camera_size());
 141         for (unsigned camera_idx = 0; camera_idx < num_cameras; ++camera_idx) {
 142                 const CameraMIDIMappingProto &camera = mapping_proto->camera(camera_idx);
 143                 if (match_bank_helper(camera, CameraMIDIMappingProto::kBankFieldNumber, current_controller_bank) &&
 144                     match_button_helper(camera, CameraMIDIMappingProto::kButtonFieldNumber, note)) {
 145                         receiver->switch_camera(camera_idx);
 146                 }
 147         }
 148
 149         match_button(note, MIDIMappingProto::kCueInFieldNumber, MIDIMappingProto::kCueInBankFieldNumber,
 150                 bind(&ControllerReceiver::cue_in, receiver));
 151         match_button(note, MIDIMappingProto::kCueOutFieldNumber, MIDIMappingProto::kCueOutBankFieldNumber,
 152                 bind(&ControllerReceiver::cue_out, receiver));
 153 }
 154
 155 void MIDIMapper::match_controller(int controller, int field_number, int bank_field_number, float value, function<void(float)> func)
 156 {
 157         if (bank_mismatch(bank_field_number)) {
 158                 return;
 159         }
 160
 161         if (match_controller_helper(*mapping_proto, field_number, controller)) {
 162                 func(value);
 163         }
 164 }
 165
 166 void MIDIMapper::match_button(int note, int field_number, int bank_field_number, function<void()> func)
 167 {
 168         if (bank_mismatch(bank_field_number)) {
 169                 return;
 170         }
 171
 172         if (match_button_helper(*mapping_proto, field_number, note)) {
 173                 func();
 174         }
 175 }
 176
 177 bool MIDIMapper::has_active_controller(int field_number, int bank_field_number)
 178 {
 179         if (bank_mismatch(bank_field_number)) {
 180                 return false;
 181         }
 182
 183         const FieldDescriptor *descriptor = mapping_proto->GetDescriptor()->FindFieldByNumber(field_number);
 184         const Reflection *reflection = mapping_proto->GetReflection();
 185         return reflection->HasField(*mapping_proto, descriptor);
 186 }
 187
 188 bool MIDIMapper::bank_mismatch(int bank_field_number)
 189 {
 190         return !match_bank_helper(*mapping_proto, bank_field_number, current_controller_bank);
 191 }
 192
 193 void MIDIMapper::refresh_lights()
 194 {
 195         lock_guard<mutex> lock(mu);
 196         update_lights_lock_held();
 197 }
 198
 199 void MIDIMapper::update_lights_lock_held()
 200 {
 201         set<unsigned> active_lights;  // Desired state.
 202         if (current_controller_bank == 0) {
 203                 activate_mapped_light(*mapping_proto, MIDIMappingProto::kBank1IsSelectedFieldNumber, &active_lights);
 204         }
 205         if (current_controller_bank == 1) {
 206                 activate_mapped_light(*mapping_proto, MIDIMappingProto::kBank2IsSelectedFieldNumber, &active_lights);
 207         }
 208         if (current_controller_bank == 2) {
 209                 activate_mapped_light(*mapping_proto, MIDIMappingProto::kBank3IsSelectedFieldNumber, &active_lights);
 210         }
 211         if (current_controller_bank == 3) {
 212                 activate_mapped_light(*mapping_proto, MIDIMappingProto::kBank4IsSelectedFieldNumber, &active_lights);
 213         }
 214         if (current_controller_bank == 4) {
 215                 activate_mapped_light(*mapping_proto, MIDIMappingProto::kBank5IsSelectedFieldNumber, &active_lights);
 216         }
 217         if (preview_enabled_light) {
 218                 activate_mapped_light(*mapping_proto, MIDIMappingProto::kPreviewEnabledFieldNumber, &active_lights);
 219         }
 220         if (queue_enabled_light) {
 221                 activate_mapped_light(*mapping_proto, MIDIMappingProto::kQueueEnabledFieldNumber, &active_lights);
 222         }
 223         if (play_enabled_light) {
 224                 activate_mapped_light(*mapping_proto, MIDIMappingProto::kPlayEnabledFieldNumber, &active_lights);
 225         }
 226         if (current_highlighted_camera >= 0 && current_highlighted_camera < mapping_proto->camera_size()) {
 227                 const CameraMIDIMappingProto &camera = mapping_proto->camera(current_highlighted_camera);
 228                 activate_mapped_light(camera, CameraMIDIMappingProto::kIsCurrentFieldNumber, &active_lights);
 229         }
 230
 231         // These are always enabled right now.
 232         activate_mapped_light(*mapping_proto, MIDIMappingProto::kCueInFieldNumber, &active_lights);
 233         activate_mapped_light(*mapping_proto, MIDIMappingProto::kCueOutFieldNumber, &active_lights);
 234
 235         midi_device.update_lights(active_lights);
 236 }