return true;
}
+bool save_midi_mapping_to_file(const MIDIMappingProto &mapping_proto, const string &filename)
+{
+ // Save to disk. We use the text format because it's friendlier
+ // for a user to look at and edit.
+ int fd = open(filename.c_str(), O_WRONLY | O_TRUNC | O_CREAT, 0666);
+ if (fd == -1) {
+ perror(filename.c_str());
+ return false;
+ }
+ io::FileOutputStream output(fd); // Takes ownership of fd.
+ if (!TextFormat::Print(mapping_proto, &output)) {
+ // TODO: Don't overwrite the old file (if any) on error.
+ output.Close();
+ return false;
+ }
+
+ output.Close();
+ return true;
+}
+
void MIDIMapper::set_midi_mapping(const MIDIMappingProto &new_mapping)
{
+ lock_guard<mutex> lock(mapping_mu);
if (mapping_proto) {
mapping_proto->CopyFrom(new_mapping);
} else {
midi_thread = thread(&MIDIMapper::thread_func, this);
}
+const MIDIMappingProto &MIDIMapper::get_current_mapping() const
+{
+ lock_guard<mutex> lock(mapping_mu);
+ return *mapping_proto;
+}
+
+ControllerReceiver *MIDIMapper::set_receiver(ControllerReceiver *new_receiver)
+{
+ lock_guard<mutex> lock(mapping_mu);
+ swap(receiver, new_receiver);
+ return new_receiver; // Now old receiver.
+}
+
#define RETURN_ON_ERROR(msg, expr) do { \
int err = (expr); \
if (err < 0) { \
void MIDIMapper::thread_func()
{
- // TODO: Listen on any port, instead of hardcoding 24:0.
snd_seq_t *seq;
int err;
RETURN_ON_ERROR("snd_seq_open", snd_seq_open(&seq, "default", SND_SEQ_OPEN_DUPLEX, 0));
+ RETURN_ON_ERROR("snd_seq_nonblock", snd_seq_nonblock(seq, 1));
RETURN_ON_ERROR("snd_seq_client_name", snd_seq_set_client_name(seq, "nageru"));
RETURN_ON_ERROR("snd_seq_create_simple_port",
snd_seq_create_simple_port(seq, "nageru",
SND_SEQ_PORT_TYPE_MIDI_GENERIC |
SND_SEQ_PORT_TYPE_APPLICATION));
- snd_seq_addr_t addr;
- RETURN_ON_ERROR("snd_seq_parse_address", snd_seq_parse_address(seq, &addr, "24:0"));
- RETURN_ON_ERROR("snd_seq_connect_from", snd_seq_connect_from(seq, 0, addr.client, addr.port));
+ // Listen to the announce port (0:1), which will tell us about new ports.
+ RETURN_ON_ERROR("snd_seq_connect_from", snd_seq_connect_from(seq, 0, /*client=*/0, /*port=*/1));
+
+ // Now go through all ports and subscribe to them.
+ snd_seq_client_info_t *cinfo;
+ snd_seq_client_info_alloca(&cinfo);
+
+ snd_seq_client_info_set_client(cinfo, -1);
+ while (snd_seq_query_next_client(seq, cinfo) >= 0) {
+ int client = snd_seq_client_info_get_client(cinfo);
+
+ snd_seq_port_info_t *pinfo;
+ snd_seq_port_info_alloca(&pinfo);
+
+ snd_seq_port_info_set_client(pinfo, client);
+ snd_seq_port_info_set_port(pinfo, -1);
+ while (snd_seq_query_next_port(seq, pinfo) >= 0) {
+ constexpr int mask = SND_SEQ_PORT_CAP_READ | SND_SEQ_PORT_CAP_SUBS_READ;
+ if ((snd_seq_port_info_get_capability(pinfo) & mask) == mask) {
+ subscribe_to_port(seq, *snd_seq_port_info_get_addr(pinfo));
+ }
+ }
+ }
int num_alsa_fds = snd_seq_poll_descriptors_count(seq, POLLIN);
unique_ptr<pollfd[]> fds(new pollfd[num_alsa_fds + 1]);
break;
}
- snd_seq_event_t *event;
- err = snd_seq_event_input(seq, &event);
- if (event->type == SND_SEQ_EVENT_CONTROLLER) {
- printf("Controller %d changed to %d\n", event->data.control.param, event->data.control.value);
-
- const int controller = event->data.control.param;
- const float value = map_controller_to_float(event->data.control.value);
-
- match_controller(controller, MIDIMappingBusProto::kLocutFieldNumber, MIDIMappingProto::kLocutBankFieldNumber,
- value, bind(&ControllerReceiver::set_locut, receiver, _2));
- match_controller(controller, MIDIMappingBusProto::kLimiterThresholdFieldNumber, MIDIMappingProto::kLimiterThresholdBankFieldNumber,
- value, bind(&ControllerReceiver::set_limiter_threshold, receiver, _2));
- match_controller(controller, MIDIMappingBusProto::kMakeupGainFieldNumber, MIDIMappingProto::kMakeupGainBankFieldNumber,
- value, bind(&ControllerReceiver::set_makeup_gain, receiver, _2));
-
- match_controller(controller, MIDIMappingBusProto::kTrebleFieldNumber, MIDIMappingProto::kTrebleBankFieldNumber,
- value, bind(&ControllerReceiver::set_treble, receiver, _1, _2));
- match_controller(controller, MIDIMappingBusProto::kMidFieldNumber, MIDIMappingProto::kMidBankFieldNumber,
- value, bind(&ControllerReceiver::set_mid, receiver, _1, _2));
- match_controller(controller, MIDIMappingBusProto::kBassFieldNumber, MIDIMappingProto::kBassBankFieldNumber,
- value, bind(&ControllerReceiver::set_bass, receiver, _1, _2));
- match_controller(controller, MIDIMappingBusProto::kGainFieldNumber, MIDIMappingProto::kGainBankFieldNumber,
- value, bind(&ControllerReceiver::set_gain, receiver, _1, _2));
- match_controller(controller, MIDIMappingBusProto::kCompressorThresholdFieldNumber, MIDIMappingProto::kCompressorThresholdBankFieldNumber,
- value, bind(&ControllerReceiver::set_compressor_threshold, receiver, _1, _2));
- match_controller(controller, MIDIMappingBusProto::kFaderFieldNumber, MIDIMappingProto::kFaderBankFieldNumber,
- value, bind(&ControllerReceiver::set_fader, receiver, _1, _2));
- } else if (event->type == SND_SEQ_EVENT_NOTEON) {
- const int note = event->data.note.note;
-
- printf("Note: %d\n", note);
-
- // Bank change commands. TODO: Highlight the bank change in the UI.
- for (size_t bus_idx = 0; bus_idx < size_t(mapping_proto->bus_mapping_size()); ++bus_idx) {
- const MIDIMappingBusProto &bus_mapping = mapping_proto->bus_mapping(bus_idx);
- if (bus_mapping.has_prev_bank() &&
- bus_mapping.prev_bank().note_number() == note) {
- current_controller_bank = (current_controller_bank + num_controller_banks - 1) % num_controller_banks;
- }
- if (bus_mapping.has_next_bank() &&
- bus_mapping.next_bank().note_number() == note) {
- current_controller_bank = (current_controller_bank + 1) % num_controller_banks;
- }
- if (bus_mapping.has_select_bank_1() &&
- bus_mapping.select_bank_1().note_number() == note) {
- current_controller_bank = 0;
- }
- if (bus_mapping.has_select_bank_2() &&
- bus_mapping.select_bank_2().note_number() == note &&
- num_controller_banks >= 2) {
- current_controller_bank = 1;
- }
- if (bus_mapping.has_select_bank_3() &&
- bus_mapping.select_bank_3().note_number() == note &&
- num_controller_banks >= 3) {
- current_controller_bank = 2;
- }
- if (bus_mapping.has_select_bank_4() &&
- bus_mapping.select_bank_4().note_number() == note &&
- num_controller_banks >= 4) {
- current_controller_bank = 3;
- }
- if (bus_mapping.has_select_bank_5() &&
- bus_mapping.select_bank_5().note_number() == note &&
- num_controller_banks >= 5) {
- current_controller_bank = 4;
- }
+ // Seemingly we can get multiple events in a single poll,
+ // and if we don't handle them all, poll will _not_ alert us!
+ while (!should_quit) {
+ snd_seq_event_t *event;
+ err = snd_seq_event_input(seq, &event);
+ if (err < 0) {
+ if (err == -EINTR) continue;
+ if (err == -EAGAIN) break;
+ fprintf(stderr, "snd_seq_event_input: %s\n", snd_strerror(err));
+ return;
+ }
+ if (event) {
+ handle_event(seq, event);
}
+ }
+ }
+}
+
+void MIDIMapper::handle_event(snd_seq_t *seq, snd_seq_event_t *event)
+{
+ lock_guard<mutex> lock(mapping_mu);
+ switch (event->type) {
+ case SND_SEQ_EVENT_CONTROLLER: {
+ printf("Controller %d changed to %d\n", event->data.control.param, event->data.control.value);
+
+ const int controller = event->data.control.param;
+ const float value = map_controller_to_float(event->data.control.value);
+
+ receiver->controller_changed(controller);
+
+ // Global controllers.
+ match_controller(controller, MIDIMappingBusProto::kLocutFieldNumber, MIDIMappingProto::kLocutBankFieldNumber,
+ value, bind(&ControllerReceiver::set_locut, receiver, _2));
+ match_controller(controller, MIDIMappingBusProto::kLimiterThresholdFieldNumber, MIDIMappingProto::kLimiterThresholdBankFieldNumber,
+ value, bind(&ControllerReceiver::set_limiter_threshold, receiver, _2));
+ match_controller(controller, MIDIMappingBusProto::kMakeupGainFieldNumber, MIDIMappingProto::kMakeupGainBankFieldNumber,
+ value, bind(&ControllerReceiver::set_makeup_gain, receiver, _2));
+
+ // Bus controllers.
+ match_controller(controller, MIDIMappingBusProto::kTrebleFieldNumber, MIDIMappingProto::kTrebleBankFieldNumber,
+ value, bind(&ControllerReceiver::set_treble, receiver, _1, _2));
+ match_controller(controller, MIDIMappingBusProto::kMidFieldNumber, MIDIMappingProto::kMidBankFieldNumber,
+ value, bind(&ControllerReceiver::set_mid, receiver, _1, _2));
+ match_controller(controller, MIDIMappingBusProto::kBassFieldNumber, MIDIMappingProto::kBassBankFieldNumber,
+ value, bind(&ControllerReceiver::set_bass, receiver, _1, _2));
+ match_controller(controller, MIDIMappingBusProto::kGainFieldNumber, MIDIMappingProto::kGainBankFieldNumber,
+ value, bind(&ControllerReceiver::set_gain, receiver, _1, _2));
+ match_controller(controller, MIDIMappingBusProto::kCompressorThresholdFieldNumber, MIDIMappingProto::kCompressorThresholdBankFieldNumber,
+ value, bind(&ControllerReceiver::set_compressor_threshold, receiver, _1, _2));
+ match_controller(controller, MIDIMappingBusProto::kFaderFieldNumber, MIDIMappingProto::kFaderBankFieldNumber,
+ value, bind(&ControllerReceiver::set_fader, receiver, _1, _2));
+ break;
+ }
+ case SND_SEQ_EVENT_NOTEON: {
+ const int note = event->data.note.note;
+
+ receiver->note_on(note);
- match_button(note, MIDIMappingBusProto::kToggleLocutFieldNumber, MIDIMappingProto::kToggleLocutBankFieldNumber,
- bind(&ControllerReceiver::toggle_locut, receiver, _1));
- match_button(note, MIDIMappingBusProto::kToggleAutoGainStagingFieldNumber, MIDIMappingProto::kToggleAutoGainStagingBankFieldNumber,
- bind(&ControllerReceiver::toggle_auto_gain_staging, receiver, _1));
- match_button(note, MIDIMappingBusProto::kToggleCompressorFieldNumber, MIDIMappingProto::kToggleCompressorBankFieldNumber,
- bind(&ControllerReceiver::toggle_compressor, receiver, _1));
- match_button(note, MIDIMappingBusProto::kClearPeakFieldNumber, MIDIMappingProto::kClearPeakBankFieldNumber,
- bind(&ControllerReceiver::clear_peak, receiver, _1));
- } else if (event->type == SND_SEQ_EVENT_NOTEOFF) {
- // Ignore.
- } else {
- printf("Ignoring MIDI event of unknown type %d.\n", event->type);
+ printf("Note: %d\n", note);
+
+ // Bank change commands. TODO: Highlight the bank change in the UI.
+ for (size_t bus_idx = 0; bus_idx < size_t(mapping_proto->bus_mapping_size()); ++bus_idx) {
+ const MIDIMappingBusProto &bus_mapping = mapping_proto->bus_mapping(bus_idx);
+ if (bus_mapping.has_prev_bank() &&
+ bus_mapping.prev_bank().note_number() == note) {
+ current_controller_bank = (current_controller_bank + num_controller_banks - 1) % num_controller_banks;
+ }
+ if (bus_mapping.has_next_bank() &&
+ bus_mapping.next_bank().note_number() == note) {
+ current_controller_bank = (current_controller_bank + 1) % num_controller_banks;
+ }
+ if (bus_mapping.has_select_bank_1() &&
+ bus_mapping.select_bank_1().note_number() == note) {
+ current_controller_bank = 0;
+ }
+ if (bus_mapping.has_select_bank_2() &&
+ bus_mapping.select_bank_2().note_number() == note &&
+ num_controller_banks >= 2) {
+ current_controller_bank = 1;
+ }
+ if (bus_mapping.has_select_bank_3() &&
+ bus_mapping.select_bank_3().note_number() == note &&
+ num_controller_banks >= 3) {
+ current_controller_bank = 2;
+ }
+ if (bus_mapping.has_select_bank_4() &&
+ bus_mapping.select_bank_4().note_number() == note &&
+ num_controller_banks >= 4) {
+ current_controller_bank = 3;
+ }
+ if (bus_mapping.has_select_bank_5() &&
+ bus_mapping.select_bank_5().note_number() == note &&
+ num_controller_banks >= 5) {
+ current_controller_bank = 4;
+ }
}
+
+ match_button(note, MIDIMappingBusProto::kToggleLocutFieldNumber, MIDIMappingProto::kToggleLocutBankFieldNumber,
+ bind(&ControllerReceiver::toggle_locut, receiver, _1));
+ match_button(note, MIDIMappingBusProto::kToggleAutoGainStagingFieldNumber, MIDIMappingProto::kToggleAutoGainStagingBankFieldNumber,
+ bind(&ControllerReceiver::toggle_auto_gain_staging, receiver, _1));
+ match_button(note, MIDIMappingBusProto::kToggleCompressorFieldNumber, MIDIMappingProto::kToggleCompressorBankFieldNumber,
+ bind(&ControllerReceiver::toggle_compressor, receiver, _1));
+ match_button(note, MIDIMappingBusProto::kClearPeakFieldNumber, MIDIMappingProto::kClearPeakBankFieldNumber,
+ bind(&ControllerReceiver::clear_peak, receiver, _1));
+ }
+ case SND_SEQ_EVENT_PORT_START:
+ subscribe_to_port(seq, event->data.addr);
+ break;
+ case SND_SEQ_EVENT_PORT_EXIT:
+ printf("MIDI port %d:%d went away.\n", event->data.addr.client, event->data.addr.port);
+ break;
+ case SND_SEQ_EVENT_NOTEOFF:
+ case SND_SEQ_EVENT_CLIENT_START:
+ case SND_SEQ_EVENT_CLIENT_EXIT:
+ case SND_SEQ_EVENT_CLIENT_CHANGE:
+ case SND_SEQ_EVENT_PORT_CHANGE:
+ case SND_SEQ_EVENT_PORT_SUBSCRIBED:
+ case SND_SEQ_EVENT_PORT_UNSUBSCRIBED:
+ break;
+ default:
+ printf("Ignoring MIDI event of unknown type %d.\n", event->type);
+ }
+}
+
+void MIDIMapper::subscribe_to_port(snd_seq_t *seq, const snd_seq_addr_t &addr)
+{
+ // Client 0 is basically the system; ignore it.
+ if (addr.client == 0) {
+ return;
+ }
+
+ int err = snd_seq_connect_from(seq, 0, addr.client, addr.port);
+ if (err < 0) {
+ // Just print out a warning (i.e., don't die); it could
+ // very well just be e.g. another application.
+ printf("Couldn't subscribe to MIDI port %d:%d (%s).\n",
+ addr.client, addr.port, snd_strerror(err));
+ } else {
+ printf("Subscribed to MIDI port %d:%d.\n", addr.client, addr.port);
}
}
projects / nageru / blobdiff