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         float value = map_controller_to_float(controller, value_int);
  82
  83         receiver->controller_changed(controller);
  84
  85         match_controller(controller, MIDIMappingProto::kJogFieldNumber, MIDIMappingProto::kJogBankFieldNumber,
  86                 delta_value, bind(&ControllerReceiver::jog, receiver, _1));
  87
  88         // Speed goes from 0.0 to 2.0 (the receiver will clamp).
  89         match_controller(controller, MIDIMappingProto::kMasterSpeedFieldNumber, MIDIMappingProto::kMasterSpeedBankFieldNumber,
  90                 value * 2.0, bind(&ControllerReceiver::set_master_speed, receiver, _1));
  91 }
  92
  93 void MIDIMapper::note_on_received(int note)
  94 {
  95         lock_guard<mutex> lock(mu);
  96         receiver->note_on(note);
  97
  98         if (mapping_proto->has_prev_bank() &&
  99             mapping_proto->prev_bank().note_number() == note) {
 100                 current_controller_bank = (current_controller_bank + num_controller_banks - 1) % num_controller_banks;
 101                 update_lights_lock_held();
 102         }
 103         if (mapping_proto->has_next_bank() &&
 104             mapping_proto->next_bank().note_number() == note) {
 105                 current_controller_bank = (current_controller_bank + 1) % num_controller_banks;
 106                 update_lights_lock_held();
 107         }
 108         if (mapping_proto->has_select_bank_1() &&
 109             mapping_proto->select_bank_1().note_number() == note) {
 110                 current_controller_bank = 0;
 111                 update_lights_lock_held();
 112         }
 113         if (mapping_proto->has_select_bank_2() &&
 114             mapping_proto->select_bank_2().note_number() == note &&
 115             num_controller_banks >= 2) {
 116                 current_controller_bank = 1;
 117                 update_lights_lock_held();
 118         }
 119         if (mapping_proto->has_select_bank_3() &&
 120             mapping_proto->select_bank_3().note_number() == note &&
 121             num_controller_banks >= 3) {
 122                 current_controller_bank = 2;
 123                 update_lights_lock_held();
 124         }
 125         if (mapping_proto->has_select_bank_4() &&
 126             mapping_proto->select_bank_4().note_number() == note &&
 127             num_controller_banks >= 4) {
 128                 current_controller_bank = 3;
 129                 update_lights_lock_held();
 130         }
 131         if (mapping_proto->has_select_bank_5() &&
 132             mapping_proto->select_bank_5().note_number() == note &&
 133             num_controller_banks >= 5) {
 134                 current_controller_bank = 4;
 135                 update_lights_lock_held();
 136         }
 137
 138         match_button(note, MIDIMappingProto::kPreviewFieldNumber, MIDIMappingProto::kPreviewBankFieldNumber,
 139                 bind(&ControllerReceiver::preview, receiver));
 140         match_button(note, MIDIMappingProto::kQueueFieldNumber, MIDIMappingProto::kQueueBankFieldNumber,
 141                 bind(&ControllerReceiver::queue, receiver));
 142         match_button(note, MIDIMappingProto::kPlayFieldNumber, MIDIMappingProto::kPlayBankFieldNumber,
 143                 bind(&ControllerReceiver::play, receiver));
 144
 145         unsigned num_cameras = std::min(MAX_STREAMS, mapping_proto->camera_size());
 146         for (unsigned camera_idx = 0; camera_idx < num_cameras; ++camera_idx) {
 147                 const CameraMIDIMappingProto &camera = mapping_proto->camera(camera_idx);
 148                 if (match_bank_helper(camera, CameraMIDIMappingProto::kBankFieldNumber, current_controller_bank) &&
 149                     match_button_helper(camera, CameraMIDIMappingProto::kButtonFieldNumber, note)) {
 150                         receiver->switch_camera(camera_idx);
 151                 }
 152         }
 153
 154         match_button(note, MIDIMappingProto::kCueInFieldNumber, MIDIMappingProto::kCueInBankFieldNumber,
 155                 bind(&ControllerReceiver::cue_in, receiver));
 156         match_button(note, MIDIMappingProto::kCueOutFieldNumber, MIDIMappingProto::kCueOutBankFieldNumber,
 157                 bind(&ControllerReceiver::cue_out, receiver));
 158 }
 159
 160 void MIDIMapper::match_controller(int controller, int field_number, int bank_field_number, float value, function<void(float)> func)
 161 {
 162         if (bank_mismatch(bank_field_number)) {
 163                 return;
 164         }
 165
 166         if (match_controller_helper(*mapping_proto, field_number, controller)) {
 167                 func(value);
 168         }
 169 }
 170
 171 void MIDIMapper::match_button(int note, int field_number, int bank_field_number, function<void()> func)
 172 {
 173         if (bank_mismatch(bank_field_number)) {
 174                 return;
 175         }
 176
 177         if (match_button_helper(*mapping_proto, field_number, note)) {
 178                 func();
 179         }
 180 }
 181
 182 bool MIDIMapper::has_active_controller(int field_number, int bank_field_number)
 183 {
 184         if (bank_mismatch(bank_field_number)) {
 185                 return false;
 186         }
 187
 188         const FieldDescriptor *descriptor = mapping_proto->GetDescriptor()->FindFieldByNumber(field_number);
 189         const Reflection *reflection = mapping_proto->GetReflection();
 190         return reflection->HasField(*mapping_proto, descriptor);
 191 }
 192
 193 bool MIDIMapper::bank_mismatch(int bank_field_number)
 194 {
 195         return !match_bank_helper(*mapping_proto, bank_field_number, current_controller_bank);
 196 }
 197
 198 void MIDIMapper::refresh_lights()
 199 {
 200         lock_guard<mutex> lock(mu);
 201         update_lights_lock_held();
 202 }
 203
 204 void MIDIMapper::update_lights_lock_held()
 205 {
 206         set<unsigned> active_lights;  // Desired state.
 207         if (current_controller_bank == 0) {
 208                 activate_mapped_light(*mapping_proto, MIDIMappingProto::kBank1IsSelectedFieldNumber, &active_lights);
 209         }
 210         if (current_controller_bank == 1) {
 211                 activate_mapped_light(*mapping_proto, MIDIMappingProto::kBank2IsSelectedFieldNumber, &active_lights);
 212         }
 213         if (current_controller_bank == 2) {
 214                 activate_mapped_light(*mapping_proto, MIDIMappingProto::kBank3IsSelectedFieldNumber, &active_lights);
 215         }
 216         if (current_controller_bank == 3) {
 217                 activate_mapped_light(*mapping_proto, MIDIMappingProto::kBank4IsSelectedFieldNumber, &active_lights);
 218         }
 219         if (current_controller_bank == 4) {
 220                 activate_mapped_light(*mapping_proto, MIDIMappingProto::kBank5IsSelectedFieldNumber, &active_lights);
 221         }
 222         if (preview_enabled_light) {
 223                 activate_mapped_light(*mapping_proto, MIDIMappingProto::kPreviewEnabledFieldNumber, &active_lights);
 224         }
 225         if (queue_enabled_light) {
 226                 activate_mapped_light(*mapping_proto, MIDIMappingProto::kQueueEnabledFieldNumber, &active_lights);
 227         }
 228         if (play_enabled_light) {
 229                 activate_mapped_light(*mapping_proto, MIDIMappingProto::kPlayEnabledFieldNumber, &active_lights);
 230         }
 231         if (current_highlighted_camera >= 0 && current_highlighted_camera < mapping_proto->camera_size()) {
 232                 const CameraMIDIMappingProto &camera = mapping_proto->camera(current_highlighted_camera);
 233                 activate_mapped_light(camera, CameraMIDIMappingProto::kIsCurrentFieldNumber, &active_lights);
 234         }
 235
 236         // These are always enabled right now.
 237         activate_mapped_light(*mapping_proto, MIDIMappingProto::kCueInFieldNumber, &active_lights);
 238         activate_mapped_light(*mapping_proto, MIDIMappingProto::kCueOutFieldNumber, &active_lights);
 239
 240         midi_device.update_lights(active_lights);
 241 }