1 #include "midi_mapper.h"
3 #include <alsa/asoundlib.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>
15 #include <sys/eventfd.h>
21 #include "audio_mixer.h"
22 #include "nageru_midi_mapping.pb.h"
23 #include "shared/midi_device.h"
24 #include "shared/midi_mapper_util.h"
25 #include "shared/text_proto.h"
27 using namespace google::protobuf;
29 using namespace std::placeholders;
33 double map_controller_to_float(int controller, int val)
35 if (controller == MIDIReceiver::PITCH_BEND_CONTROLLER) {
36 // We supposedly go from -8192 to 8191 (inclusive), but there are
37 // controllers that only have 10-bit precision and do the upconversion
38 // to 14-bit wrong (just padding with zeros), making 8176 the highest
39 // attainable value. We solve this by making the effective range
40 // -8176..8176 (inclusive).
43 } else if (val >= 8176) {
46 return 0.5 * (double(val) / 8176.0) + 0.5;
50 // Slightly hackish mapping so that we can represent exactly 0.0, 0.5 and 1.0.
53 } else if (val >= 127) {
56 return (val + 0.5) / 127.0;
62 MIDIMapper::MIDIMapper(ControllerReceiver *receiver)
63 : receiver(receiver), mapping_proto(new MIDIMappingProto), midi_device(this)
67 MIDIMapper::~MIDIMapper() {}
69 bool load_midi_mapping_from_file(const string &filename, MIDIMappingProto *new_mapping)
71 return load_proto_from_file(filename, new_mapping);
74 bool save_midi_mapping_to_file(const MIDIMappingProto &mapping_proto, const string &filename)
76 return save_proto_to_file(mapping_proto, filename);
79 void MIDIMapper::set_midi_mapping(const MIDIMappingProto &new_mapping)
81 lock_guard<mutex> lock(mu);
83 mapping_proto->CopyFrom(new_mapping);
85 mapping_proto.reset(new MIDIMappingProto(new_mapping));
88 num_controller_banks = min(max(mapping_proto->num_controller_banks(), 1), 5);
89 current_controller_bank = 0;
91 receiver->clear_all_highlights();
95 void MIDIMapper::start_thread()
97 midi_device.start_thread();
100 const MIDIMappingProto &MIDIMapper::get_current_mapping() const
102 lock_guard<mutex> lock(mu);
103 return *mapping_proto;
106 ControllerReceiver *MIDIMapper::set_receiver(ControllerReceiver *new_receiver)
108 lock_guard<mutex> lock(mu);
109 swap(receiver, new_receiver);
110 return new_receiver; // Now old receiver.
113 void MIDIMapper::controller_received(int controller, int value_int)
115 const float value = map_controller_to_float(controller, value_int);
117 receiver->controller_changed(controller);
119 // Global controllers.
120 match_controller(controller, MIDIMappingBusProto::kLocutFieldNumber, MIDIMappingProto::kLocutBankFieldNumber,
121 value, bind(&ControllerReceiver::set_locut, receiver, _2));
122 match_controller(controller, MIDIMappingBusProto::kLimiterThresholdFieldNumber, MIDIMappingProto::kLimiterThresholdBankFieldNumber,
123 value, bind(&ControllerReceiver::set_limiter_threshold, receiver, _2));
124 match_controller(controller, MIDIMappingBusProto::kMakeupGainFieldNumber, MIDIMappingProto::kMakeupGainBankFieldNumber,
125 value, bind(&ControllerReceiver::set_makeup_gain, receiver, _2));
128 match_controller(controller, MIDIMappingBusProto::kStereoWidthFieldNumber, MIDIMappingProto::kStereoWidthBankFieldNumber,
129 value, bind(&ControllerReceiver::set_stereo_width, receiver, _1, _2));
130 match_controller(controller, MIDIMappingBusProto::kTrebleFieldNumber, MIDIMappingProto::kTrebleBankFieldNumber,
131 value, bind(&ControllerReceiver::set_treble, receiver, _1, _2));
132 match_controller(controller, MIDIMappingBusProto::kMidFieldNumber, MIDIMappingProto::kMidBankFieldNumber,
133 value, bind(&ControllerReceiver::set_mid, receiver, _1, _2));
134 match_controller(controller, MIDIMappingBusProto::kBassFieldNumber, MIDIMappingProto::kBassBankFieldNumber,
135 value, bind(&ControllerReceiver::set_bass, receiver, _1, _2));
136 match_controller(controller, MIDIMappingBusProto::kGainFieldNumber, MIDIMappingProto::kGainBankFieldNumber,
137 value, bind(&ControllerReceiver::set_gain, receiver, _1, _2));
138 match_controller(controller, MIDIMappingBusProto::kCompressorThresholdFieldNumber, MIDIMappingProto::kCompressorThresholdBankFieldNumber,
139 value, bind(&ControllerReceiver::set_compressor_threshold, receiver, _1, _2));
140 match_controller(controller, MIDIMappingBusProto::kFaderFieldNumber, MIDIMappingProto::kFaderBankFieldNumber,
141 value, bind(&ControllerReceiver::set_fader, receiver, _1, _2));
144 void MIDIMapper::note_on_received(int note)
146 lock_guard<mutex> lock(mu);
147 receiver->note_on(note);
149 for (size_t bus_idx = 0; bus_idx < size_t(mapping_proto->bus_mapping_size()); ++bus_idx) {
150 const MIDIMappingBusProto &bus_mapping = mapping_proto->bus_mapping(bus_idx);
151 if (bus_mapping.has_prev_bank() &&
152 bus_mapping.prev_bank().note_number() == note) {
153 current_controller_bank = (current_controller_bank + num_controller_banks - 1) % num_controller_banks;
155 update_lights_lock_held();
157 if (bus_mapping.has_next_bank() &&
158 bus_mapping.next_bank().note_number() == note) {
159 current_controller_bank = (current_controller_bank + 1) % num_controller_banks;
161 update_lights_lock_held();
163 if (bus_mapping.has_select_bank_1() &&
164 bus_mapping.select_bank_1().note_number() == note) {
165 current_controller_bank = 0;
167 update_lights_lock_held();
169 if (bus_mapping.has_select_bank_2() &&
170 bus_mapping.select_bank_2().note_number() == note &&
171 num_controller_banks >= 2) {
172 current_controller_bank = 1;
174 update_lights_lock_held();
176 if (bus_mapping.has_select_bank_3() &&
177 bus_mapping.select_bank_3().note_number() == note &&
178 num_controller_banks >= 3) {
179 current_controller_bank = 2;
181 update_lights_lock_held();
183 if (bus_mapping.has_select_bank_4() &&
184 bus_mapping.select_bank_4().note_number() == note &&
185 num_controller_banks >= 4) {
186 current_controller_bank = 3;
188 update_lights_lock_held();
190 if (bus_mapping.has_select_bank_5() &&
191 bus_mapping.select_bank_5().note_number() == note &&
192 num_controller_banks >= 5) {
193 current_controller_bank = 4;
195 update_lights_lock_held();
199 match_button(note, MIDIMappingBusProto::kToggleLocutFieldNumber, MIDIMappingProto::kToggleLocutBankFieldNumber,
200 bind(&ControllerReceiver::toggle_locut, receiver, _1));
201 match_button(note, MIDIMappingBusProto::kToggleAutoGainStagingFieldNumber, MIDIMappingProto::kToggleAutoGainStagingBankFieldNumber,
202 bind(&ControllerReceiver::toggle_auto_gain_staging, receiver, _1));
203 match_button(note, MIDIMappingBusProto::kToggleCompressorFieldNumber, MIDIMappingProto::kToggleCompressorBankFieldNumber,
204 bind(&ControllerReceiver::toggle_compressor, receiver, _1));
205 match_button(note, MIDIMappingBusProto::kClearPeakFieldNumber, MIDIMappingProto::kClearPeakBankFieldNumber,
206 bind(&ControllerReceiver::clear_peak, receiver, _1));
207 match_button(note, MIDIMappingBusProto::kToggleMuteFieldNumber, MIDIMappingProto::kClearPeakBankFieldNumber,
208 bind(&ControllerReceiver::toggle_mute, receiver, _1));
209 match_button(note, MIDIMappingBusProto::kToggleLimiterFieldNumber, MIDIMappingProto::kToggleLimiterBankFieldNumber,
210 bind(&ControllerReceiver::toggle_limiter, receiver));
211 match_button(note, MIDIMappingBusProto::kToggleAutoMakeupGainFieldNumber, MIDIMappingProto::kToggleAutoMakeupGainBankFieldNumber,
212 bind(&ControllerReceiver::toggle_auto_makeup_gain, receiver));
215 void MIDIMapper::update_num_subscribers(unsigned num_subscribers)
217 num_subscribed_ports = num_subscribers;
221 void MIDIMapper::match_controller(int controller, int field_number, int bank_field_number, float value, function<void(unsigned, float)> func)
223 if (bank_mismatch(bank_field_number)) {
227 for (size_t bus_idx = 0; bus_idx < size_t(mapping_proto->bus_mapping_size()); ++bus_idx) {
228 const MIDIMappingBusProto &bus_mapping = mapping_proto->bus_mapping(bus_idx);
229 if (match_controller_helper(bus_mapping, field_number, controller)) {
230 func(bus_idx, value);
235 void MIDIMapper::match_button(int note, int field_number, int bank_field_number, function<void(unsigned)> func)
237 if (bank_mismatch(bank_field_number)) {
241 for (size_t bus_idx = 0; bus_idx < size_t(mapping_proto->bus_mapping_size()); ++bus_idx) {
242 const MIDIMappingBusProto &bus_mapping = mapping_proto->bus_mapping(bus_idx);
243 if (match_button_helper(bus_mapping, field_number, note)) {
249 bool MIDIMapper::has_active_controller(unsigned bus_idx, int field_number, int bank_field_number)
251 if (bank_mismatch(bank_field_number)) {
255 const MIDIMappingBusProto &bus_mapping = mapping_proto->bus_mapping(bus_idx);
256 const FieldDescriptor *descriptor = bus_mapping.GetDescriptor()->FindFieldByNumber(field_number);
257 const Reflection *bus_reflection = bus_mapping.GetReflection();
258 return bus_reflection->HasField(bus_mapping, descriptor);
261 bool MIDIMapper::bank_mismatch(int bank_field_number)
263 return !match_bank_helper(*mapping_proto, bank_field_number, current_controller_bank);
266 void MIDIMapper::refresh_highlights()
268 receiver->clear_all_highlights();
272 void MIDIMapper::refresh_lights()
274 lock_guard<mutex> lock(mu);
275 update_lights_lock_held();
278 void MIDIMapper::update_highlights()
280 if (num_subscribed_ports.load() == 0) {
281 receiver->clear_all_highlights();
285 // Global controllers.
286 bool highlight_locut = false;
287 bool highlight_limiter_threshold = false;
288 bool highlight_makeup_gain = false;
289 bool highlight_toggle_limiter = false;
290 bool highlight_toggle_auto_makeup_gain = false;
291 for (size_t bus_idx = 0; bus_idx < size_t(mapping_proto->bus_mapping_size()); ++bus_idx) {
292 if (has_active_controller(
293 bus_idx, MIDIMappingBusProto::kLocutFieldNumber, MIDIMappingProto::kLocutBankFieldNumber)) {
294 highlight_locut = true;
296 if (has_active_controller(
297 bus_idx, MIDIMappingBusProto::kLimiterThresholdFieldNumber, MIDIMappingProto::kLimiterThresholdBankFieldNumber)) {
298 highlight_limiter_threshold = true;
300 if (has_active_controller(
301 bus_idx, MIDIMappingBusProto::kMakeupGainFieldNumber, MIDIMappingProto::kMakeupGainBankFieldNumber)) {
302 highlight_makeup_gain = true;
304 if (has_active_controller(
305 bus_idx, MIDIMappingBusProto::kToggleLimiterFieldNumber, MIDIMappingProto::kToggleLimiterBankFieldNumber)) {
306 highlight_toggle_limiter = true;
308 if (has_active_controller(
309 bus_idx, MIDIMappingBusProto::kToggleAutoMakeupGainFieldNumber, MIDIMappingProto::kToggleAutoMakeupGainBankFieldNumber)) {
310 highlight_toggle_auto_makeup_gain = true;
313 receiver->highlight_locut(highlight_locut);
314 receiver->highlight_limiter_threshold(highlight_limiter_threshold);
315 receiver->highlight_makeup_gain(highlight_makeup_gain);
316 receiver->highlight_toggle_limiter(highlight_toggle_limiter);
317 receiver->highlight_toggle_auto_makeup_gain(highlight_toggle_auto_makeup_gain);
319 // Per-bus controllers.
320 for (size_t bus_idx = 0; bus_idx < size_t(mapping_proto->bus_mapping_size()); ++bus_idx) {
321 receiver->highlight_stereo_width(bus_idx, has_active_controller(
322 bus_idx, MIDIMappingBusProto::kStereoWidthFieldNumber, MIDIMappingProto::kStereoWidthBankFieldNumber));
323 receiver->highlight_treble(bus_idx, has_active_controller(
324 bus_idx, MIDIMappingBusProto::kTrebleFieldNumber, MIDIMappingProto::kTrebleBankFieldNumber));
325 receiver->highlight_mid(bus_idx, has_active_controller(
326 bus_idx, MIDIMappingBusProto::kMidFieldNumber, MIDIMappingProto::kMidBankFieldNumber));
327 receiver->highlight_bass(bus_idx, has_active_controller(
328 bus_idx, MIDIMappingBusProto::kBassFieldNumber, MIDIMappingProto::kBassBankFieldNumber));
329 receiver->highlight_gain(bus_idx, has_active_controller(
330 bus_idx, MIDIMappingBusProto::kGainFieldNumber, MIDIMappingProto::kGainBankFieldNumber));
331 receiver->highlight_compressor_threshold(bus_idx, has_active_controller(
332 bus_idx, MIDIMappingBusProto::kCompressorThresholdFieldNumber, MIDIMappingProto::kCompressorThresholdBankFieldNumber));
333 receiver->highlight_fader(bus_idx, has_active_controller(
334 bus_idx, MIDIMappingBusProto::kFaderFieldNumber, MIDIMappingProto::kFaderBankFieldNumber));
335 receiver->highlight_mute(bus_idx, has_active_controller(
336 bus_idx, MIDIMappingBusProto::kToggleMuteFieldNumber, MIDIMappingProto::kToggleMuteBankFieldNumber));
337 receiver->highlight_toggle_locut(bus_idx, has_active_controller(
338 bus_idx, MIDIMappingBusProto::kToggleLocutFieldNumber, MIDIMappingProto::kToggleLocutBankFieldNumber));
339 receiver->highlight_toggle_auto_gain_staging(bus_idx, has_active_controller(
340 bus_idx, MIDIMappingBusProto::kToggleAutoGainStagingFieldNumber, MIDIMappingProto::kToggleAutoGainStagingBankFieldNumber));
341 receiver->highlight_toggle_compressor(bus_idx, has_active_controller(
342 bus_idx, MIDIMappingBusProto::kToggleCompressorFieldNumber, MIDIMappingProto::kToggleCompressorBankFieldNumber));
346 void MIDIMapper::update_lights_lock_held()
348 if (global_audio_mixer == nullptr) {
352 set<unsigned> active_lights; // Desired state.
353 if (current_controller_bank == 0) {
354 activate_lights_all_buses(MIDIMappingBusProto::kBank1IsSelectedFieldNumber, &active_lights);
356 if (current_controller_bank == 1) {
357 activate_lights_all_buses(MIDIMappingBusProto::kBank2IsSelectedFieldNumber, &active_lights);
359 if (current_controller_bank == 2) {
360 activate_lights_all_buses(MIDIMappingBusProto::kBank3IsSelectedFieldNumber, &active_lights);
362 if (current_controller_bank == 3) {
363 activate_lights_all_buses(MIDIMappingBusProto::kBank4IsSelectedFieldNumber, &active_lights);
365 if (current_controller_bank == 4) {
366 activate_lights_all_buses(MIDIMappingBusProto::kBank5IsSelectedFieldNumber, &active_lights);
368 if (global_audio_mixer->get_limiter_enabled()) {
369 activate_lights_all_buses(MIDIMappingBusProto::kLimiterIsOnFieldNumber, &active_lights);
371 if (global_audio_mixer->get_final_makeup_gain_auto()) {
372 activate_lights_all_buses(MIDIMappingBusProto::kAutoMakeupGainIsOnFieldNumber, &active_lights);
374 unsigned num_buses = min<unsigned>(global_audio_mixer->num_buses(), mapping_proto->bus_mapping_size());
375 for (unsigned bus_idx = 0; bus_idx < num_buses; ++bus_idx) {
376 const MIDIMappingBusProto &bus_mapping = mapping_proto->bus_mapping(bus_idx);
377 if (global_audio_mixer->get_mute(bus_idx)) {
378 activate_mapped_light(bus_mapping, MIDIMappingBusProto::kIsMutedFieldNumber, &active_lights);
380 if (global_audio_mixer->get_locut_enabled(bus_idx)) {
381 activate_mapped_light(bus_mapping, MIDIMappingBusProto::kLocutIsOnFieldNumber, &active_lights);
383 if (global_audio_mixer->get_gain_staging_auto(bus_idx)) {
384 activate_mapped_light(bus_mapping, MIDIMappingBusProto::kAutoGainStagingIsOnFieldNumber, &active_lights);
386 if (global_audio_mixer->get_compressor_enabled(bus_idx)) {
387 activate_mapped_light(bus_mapping, MIDIMappingBusProto::kCompressorIsOnFieldNumber, &active_lights);
389 if (has_peaked[bus_idx]) {
390 activate_mapped_light(bus_mapping, MIDIMappingBusProto::kHasPeakedFieldNumber, &active_lights);
394 midi_device.update_lights(active_lights);
397 void MIDIMapper::activate_lights_all_buses(int field_number, set<unsigned> *active_lights)
399 for (size_t bus_idx = 0; bus_idx < size_t(mapping_proto->bus_mapping_size()); ++bus_idx) {
400 const MIDIMappingBusProto &bus_mapping = mapping_proto->bus_mapping(bus_idx);
401 activate_mapped_light(bus_mapping, field_number, active_lights);