--- /dev/null
+#include "midi_device.h"
+
+#include <alsa/asoundlib.h>
+#include <sys/eventfd.h>
+#include <unistd.h>
+#include <thread>
+#include <utility>
+
+using namespace std;
+
+MIDIDevice::MIDIDevice(MIDIReceiver *receiver)
+ : receiver(receiver)
+{
+ should_quit_fd = eventfd(/*initval=*/0, /*flags=*/0);
+ assert(should_quit_fd != -1);
+}
+
+MIDIDevice::~MIDIDevice()
+{
+ should_quit = true;
+ const uint64_t one = 1;
+ if (write(should_quit_fd, &one, sizeof(one)) != sizeof(one)) {
+ perror("write(should_quit_fd)");
+ exit(1);
+ }
+ midi_thread.join();
+ close(should_quit_fd);
+}
+
+void MIDIDevice::start_thread()
+{
+ midi_thread = thread(&MIDIDevice::thread_func, this);
+}
+
+#define RETURN_ON_ERROR(msg, expr) do { \
+ int err = (expr); \
+ if (err < 0) { \
+ fprintf(stderr, msg ": %s\n", snd_strerror(err)); \
+ return; \
+ } \
+} while (false)
+
+#define WARN_ON_ERROR(msg, expr) do { \
+ int err = (expr); \
+ if (err < 0) { \
+ fprintf(stderr, msg ": %s\n", snd_strerror(err)); \
+ } \
+} while (false)
+
+
+void MIDIDevice::thread_func()
+{
+ pthread_setname_np(pthread_self(), "MIDIDevice");
+
+ 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_CAP_READ |
+ SND_SEQ_PORT_CAP_SUBS_READ |
+ SND_SEQ_PORT_CAP_WRITE |
+ SND_SEQ_PORT_CAP_SUBS_WRITE,
+ SND_SEQ_PORT_TYPE_MIDI_GENERIC |
+ SND_SEQ_PORT_TYPE_APPLICATION));
+
+ int queue_id = snd_seq_alloc_queue(seq);
+ RETURN_ON_ERROR("snd_seq_create_queue", queue_id);
+ RETURN_ON_ERROR("snd_seq_start_queue", snd_seq_start_queue(seq, queue_id, nullptr));
+
+ // The sequencer object is now ready to be used from other threads.
+ {
+ lock_guard<mutex> lock(mu);
+ alsa_seq = seq;
+ alsa_queue_id = queue_id;
+ }
+
+ // 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) {
+ lock_guard<mutex> lock(mu);
+ subscribe_to_port_lock_held(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]);
+
+ while (!should_quit) {
+ snd_seq_poll_descriptors(seq, fds.get(), num_alsa_fds, POLLIN);
+ fds[num_alsa_fds].fd = should_quit_fd;
+ fds[num_alsa_fds].events = POLLIN;
+ fds[num_alsa_fds].revents = 0;
+
+ err = poll(fds.get(), num_alsa_fds + 1, -1);
+ if (err == 0 || (err == -1 && errno == EINTR)) {
+ continue;
+ }
+ if (err == -1) {
+ perror("poll");
+ break;
+ }
+ if (fds[num_alsa_fds].revents) {
+ // Activity on should_quit_fd.
+ break;
+ }
+
+ // 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;
+ if (err == -ENOSPC) {
+ fprintf(stderr, "snd_seq_event_input: Some events were lost.\n");
+ continue;
+ }
+ fprintf(stderr, "snd_seq_event_input: %s\n", snd_strerror(err));
+ return;
+ }
+ if (event) {
+ handle_event(seq, event);
+ }
+ }
+ }
+}
+
+void MIDIDevice::handle_event(snd_seq_t *seq, snd_seq_event_t *event)
+{
+ if (event->source.client == snd_seq_client_id(seq)) {
+ // Ignore events we sent out ourselves.
+ return;
+ }
+
+ lock_guard<mutex> lock(mu);
+ switch (event->type) {
+ case SND_SEQ_EVENT_CONTROLLER: {
+ receiver->controller_received(event->data.control.param, event->data.control.value);
+ break;
+ }
+ case SND_SEQ_EVENT_NOTEON: {
+ receiver->note_on_received(event->data.note.note);
+ break;
+ }
+ case SND_SEQ_EVENT_PORT_START:
+ subscribe_to_port_lock_held(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_PORT_SUBSCRIBED:
+ if (event->data.connect.sender.client != 0 && // Ignore system senders.
+ event->data.connect.sender.client != snd_seq_client_id(seq) &&
+ event->data.connect.dest.client == snd_seq_client_id(seq)) {
+ receiver->update_num_subscribers(++num_subscribed_ports);
+ }
+ break;
+ case SND_SEQ_EVENT_PORT_UNSUBSCRIBED:
+ if (event->data.connect.sender.client != 0 && // Ignore system senders.
+ event->data.connect.sender.client != snd_seq_client_id(seq) &&
+ event->data.connect.dest.client == snd_seq_client_id(seq)) {
+ receiver->update_num_subscribers(--num_subscribed_ports);
+ }
+ 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:
+ break;
+ default:
+ printf("Ignoring MIDI event of unknown type %d.\n", event->type);
+ }
+}
+
+void MIDIDevice::subscribe_to_port_lock_held(snd_seq_t *seq, const snd_seq_addr_t &addr)
+{
+ // Client 0 (SNDRV_SEQ_CLIENT_SYSTEM) is basically the system; ignore it.
+ // MIDI through (SNDRV_SEQ_CLIENT_DUMMY) echoes back what we give it, so ignore that, too.
+ if (addr.client == 0 || addr.client == 14) {
+ return;
+ }
+
+ // Don't listen to ourselves.
+ if (addr.client == snd_seq_client_id(seq)) {
+ 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);
+ }
+
+ // For sending data back.
+ err = snd_seq_connect_to(seq, 0, addr.client, addr.port);
+ if (err < 0) {
+ printf("Couldn't subscribe MIDI port %d:%d (%s) to us.\n",
+ addr.client, addr.port, snd_strerror(err));
+ } else {
+ printf("Subscribed MIDI port %d:%d to us.\n", addr.client, addr.port);
+ }
+
+ // The current status of the device is unknown, so refresh it.
+ set<unsigned> active_lights;
+ for (const auto &it : current_light_status) {
+ if (it.second) {
+ active_lights.insert(it.first);
+ }
+ }
+ current_light_status.clear();
+ update_lights_lock_held(active_lights);
+}
+
+void MIDIDevice::update_lights_lock_held(const set<unsigned> &active_lights)
+{
+ if (alsa_seq == nullptr) {
+ return;
+ }
+
+ unsigned num_events = 0;
+ for (unsigned note_num = 1; note_num <= 127; ++note_num) {
+ bool active = active_lights.count(note_num);
+ if (current_light_status.count(note_num) &&
+ current_light_status[note_num] == active) {
+ // Already known to be in the desired state.
+ continue;
+ }
+
+ snd_seq_event_t ev;
+ snd_seq_ev_clear(&ev);
+
+ // Some devices drop events if we throw them onto them
+ // too quickly. Add a 1 ms delay for each.
+ snd_seq_real_time_t tm{0, num_events++ * 1000000};
+ snd_seq_ev_schedule_real(&ev, alsa_queue_id, true, &tm);
+ snd_seq_ev_set_source(&ev, 0);
+ snd_seq_ev_set_subs(&ev);
+
+ // For some reason, not all devices respond to note off.
+ // Use note-on with velocity of 0 (which is equivalent) instead.
+ snd_seq_ev_set_noteon(&ev, /*channel=*/0, note_num, active ? 1 : 0);
+ WARN_ON_ERROR("snd_seq_event_output", snd_seq_event_output(alsa_seq, &ev));
+ current_light_status[note_num] = active;
+ }
+ WARN_ON_ERROR("snd_seq_drain_output", snd_seq_drain_output(alsa_seq));
+}
} // namespace
MIDIMapper::MIDIMapper(ControllerReceiver *receiver)
- : receiver(receiver), mapping_proto(new MIDIMappingProto)
+ : receiver(receiver), mapping_proto(new MIDIMappingProto), midi_device(this)
{
- should_quit_fd = eventfd(/*initval=*/0, /*flags=*/0);
- assert(should_quit_fd != -1);
}
-MIDIMapper::~MIDIMapper()
-{
- should_quit = true;
- const uint64_t one = 1;
- if (write(should_quit_fd, &one, sizeof(one)) != sizeof(one)) {
- perror("write(should_quit_fd)");
- exit(1);
- }
- midi_thread.join();
- close(should_quit_fd);
-}
+MIDIMapper::~MIDIMapper() {}
bool load_midi_mapping_from_file(const string &filename, MIDIMappingProto *new_mapping)
{
void MIDIMapper::start_thread()
{
- midi_thread = thread(&MIDIMapper::thread_func, this);
+ midi_device.start_thread();
}
const MIDIMappingProto &MIDIMapper::get_current_mapping() const
return new_receiver; // Now old receiver.
}
-#define RETURN_ON_ERROR(msg, expr) do { \
- int err = (expr); \
- if (err < 0) { \
- fprintf(stderr, msg ": %s\n", snd_strerror(err)); \
- return; \
- } \
-} while (false)
-
-#define WARN_ON_ERROR(msg, expr) do { \
- int err = (expr); \
- if (err < 0) { \
- fprintf(stderr, msg ": %s\n", snd_strerror(err)); \
- } \
-} while (false)
-
-
-void MIDIMapper::thread_func()
+void MIDIMapper::controller_received(int controller, int value_int)
{
- pthread_setname_np(pthread_self(), "MIDIMapper");
-
- 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_CAP_READ |
- SND_SEQ_PORT_CAP_SUBS_READ |
- SND_SEQ_PORT_CAP_WRITE |
- SND_SEQ_PORT_CAP_SUBS_WRITE,
- SND_SEQ_PORT_TYPE_MIDI_GENERIC |
- SND_SEQ_PORT_TYPE_APPLICATION));
-
- int queue_id = snd_seq_alloc_queue(seq);
- RETURN_ON_ERROR("snd_seq_create_queue", queue_id);
- RETURN_ON_ERROR("snd_seq_start_queue", snd_seq_start_queue(seq, queue_id, nullptr));
-
- // The sequencer object is now ready to be used from other threads.
- {
- lock_guard<mutex> lock(mu);
- alsa_seq = seq;
- alsa_queue_id = queue_id;
- }
+ const float value = map_controller_to_float(value_int);
- // 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));
+ receiver->controller_changed(controller);
- // 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) {
- lock_guard<mutex> lock(mu);
- subscribe_to_port_lock_held(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]);
+ // 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::kStereoWidthFieldNumber, MIDIMappingProto::kStereoWidthBankFieldNumber,
+ value, bind(&ControllerReceiver::set_stereo_width, receiver, _1, _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));
+}
- while (!should_quit) {
- snd_seq_poll_descriptors(seq, fds.get(), num_alsa_fds, POLLIN);
- fds[num_alsa_fds].fd = should_quit_fd;
- fds[num_alsa_fds].events = POLLIN;
- fds[num_alsa_fds].revents = 0;
+void MIDIMapper::note_on_received(int note)
+{
+ lock_guard<mutex> lock(mu);
+ receiver->note_on(note);
- err = poll(fds.get(), num_alsa_fds + 1, -1);
- if (err == 0 || (err == -1 && errno == EINTR)) {
- continue;
+ 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;
+ update_highlights();
+ update_lights_lock_held();
}
- if (err == -1) {
- perror("poll");
- break;
+ if (bus_mapping.has_next_bank() &&
+ bus_mapping.next_bank().note_number() == note) {
+ current_controller_bank = (current_controller_bank + 1) % num_controller_banks;
+ update_highlights();
+ update_lights_lock_held();
}
- if (fds[num_alsa_fds].revents) {
- // Activity on should_quit_fd.
- break;
+ if (bus_mapping.has_select_bank_1() &&
+ bus_mapping.select_bank_1().note_number() == note) {
+ current_controller_bank = 0;
+ update_highlights();
+ update_lights_lock_held();
}
-
- // 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;
- if (err == -ENOSPC) {
- fprintf(stderr, "snd_seq_event_input: Some events were lost.\n");
- continue;
- }
- fprintf(stderr, "snd_seq_event_input: %s\n", snd_strerror(err));
- return;
- }
- if (event) {
- handle_event(seq, event);
- }
+ if (bus_mapping.has_select_bank_2() &&
+ bus_mapping.select_bank_2().note_number() == note &&
+ num_controller_banks >= 2) {
+ current_controller_bank = 1;
+ update_highlights();
+ update_lights_lock_held();
}
- }
-}
-
-void MIDIMapper::handle_event(snd_seq_t *seq, snd_seq_event_t *event)
-{
- if (event->source.client == snd_seq_client_id(seq)) {
- // Ignore events we sent out ourselves.
- return;
- }
-
- lock_guard<mutex> lock(mu);
- switch (event->type) {
- case SND_SEQ_EVENT_CONTROLLER: {
- 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::kStereoWidthFieldNumber, MIDIMappingProto::kStereoWidthBankFieldNumber,
- value, bind(&ControllerReceiver::set_stereo_width, receiver, _1, _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));
- break;
- }
- case SND_SEQ_EVENT_NOTEON: {
- const int note = event->data.note.note;
-
- receiver->note_on(note);
-
- 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;
- update_highlights();
- update_lights_lock_held();
- }
- if (bus_mapping.has_next_bank() &&
- bus_mapping.next_bank().note_number() == note) {
- current_controller_bank = (current_controller_bank + 1) % num_controller_banks;
- update_highlights();
- update_lights_lock_held();
- }
- if (bus_mapping.has_select_bank_1() &&
- bus_mapping.select_bank_1().note_number() == note) {
- current_controller_bank = 0;
- update_highlights();
- update_lights_lock_held();
- }
- if (bus_mapping.has_select_bank_2() &&
- bus_mapping.select_bank_2().note_number() == note &&
- num_controller_banks >= 2) {
- current_controller_bank = 1;
- update_highlights();
- update_lights_lock_held();
- }
- if (bus_mapping.has_select_bank_3() &&
- bus_mapping.select_bank_3().note_number() == note &&
- num_controller_banks >= 3) {
- current_controller_bank = 2;
- update_highlights();
- update_lights_lock_held();
- }
- if (bus_mapping.has_select_bank_4() &&
- bus_mapping.select_bank_4().note_number() == note &&
- num_controller_banks >= 4) {
- current_controller_bank = 3;
- update_highlights();
- update_lights_lock_held();
- }
- if (bus_mapping.has_select_bank_5() &&
- bus_mapping.select_bank_5().note_number() == note &&
- num_controller_banks >= 5) {
- current_controller_bank = 4;
- update_highlights();
- update_lights_lock_held();
- }
+ if (bus_mapping.has_select_bank_3() &&
+ bus_mapping.select_bank_3().note_number() == note &&
+ num_controller_banks >= 3) {
+ current_controller_bank = 2;
+ update_highlights();
+ update_lights_lock_held();
}
-
- 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));
- match_button(note, MIDIMappingBusProto::kToggleMuteFieldNumber, MIDIMappingProto::kClearPeakBankFieldNumber,
- bind(&ControllerReceiver::toggle_mute, receiver, _1));
- match_button(note, MIDIMappingBusProto::kToggleLimiterFieldNumber, MIDIMappingProto::kToggleLimiterBankFieldNumber,
- bind(&ControllerReceiver::toggle_limiter, receiver));
- match_button(note, MIDIMappingBusProto::kToggleAutoMakeupGainFieldNumber, MIDIMappingProto::kToggleAutoMakeupGainBankFieldNumber,
- bind(&ControllerReceiver::toggle_auto_makeup_gain, receiver));
- break;
- }
- case SND_SEQ_EVENT_PORT_START:
- subscribe_to_port_lock_held(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_PORT_SUBSCRIBED:
- if (event->data.connect.sender.client != 0 && // Ignore system senders.
- event->data.connect.sender.client != snd_seq_client_id(seq) &&
- event->data.connect.dest.client == snd_seq_client_id(seq)) {
- ++num_subscribed_ports;
+ if (bus_mapping.has_select_bank_4() &&
+ bus_mapping.select_bank_4().note_number() == note &&
+ num_controller_banks >= 4) {
+ current_controller_bank = 3;
update_highlights();
+ update_lights_lock_held();
}
- break;
- case SND_SEQ_EVENT_PORT_UNSUBSCRIBED:
- if (event->data.connect.sender.client != 0 && // Ignore system senders.
- event->data.connect.sender.client != snd_seq_client_id(seq) &&
- event->data.connect.dest.client == snd_seq_client_id(seq)) {
- --num_subscribed_ports;
+ if (bus_mapping.has_select_bank_5() &&
+ bus_mapping.select_bank_5().note_number() == note &&
+ num_controller_banks >= 5) {
+ current_controller_bank = 4;
update_highlights();
+ update_lights_lock_held();
}
- 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:
- break;
- default:
- printf("Ignoring MIDI event of unknown type %d.\n", event->type);
}
+
+ 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));
+ match_button(note, MIDIMappingBusProto::kToggleMuteFieldNumber, MIDIMappingProto::kClearPeakBankFieldNumber,
+ bind(&ControllerReceiver::toggle_mute, receiver, _1));
+ match_button(note, MIDIMappingBusProto::kToggleLimiterFieldNumber, MIDIMappingProto::kToggleLimiterBankFieldNumber,
+ bind(&ControllerReceiver::toggle_limiter, receiver));
+ match_button(note, MIDIMappingBusProto::kToggleAutoMakeupGainFieldNumber, MIDIMappingProto::kToggleAutoMakeupGainBankFieldNumber,
+ bind(&ControllerReceiver::toggle_auto_makeup_gain, receiver));
}
-void MIDIMapper::subscribe_to_port_lock_held(snd_seq_t *seq, const snd_seq_addr_t &addr)
+void MIDIMapper::update_num_subscribers(unsigned num_subscribers)
{
- // Client 0 (SNDRV_SEQ_CLIENT_SYSTEM) is basically the system; ignore it.
- // MIDI through (SNDRV_SEQ_CLIENT_DUMMY) echoes back what we give it, so ignore that, too.
- if (addr.client == 0 || addr.client == 14) {
- return;
- }
-
- // Don't listen to ourselves.
- if (addr.client == snd_seq_client_id(seq)) {
- 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);
- }
-
- // For sending data back.
- err = snd_seq_connect_to(seq, 0, addr.client, addr.port);
- if (err < 0) {
- printf("Couldn't subscribe MIDI port %d:%d (%s) to us.\n",
- addr.client, addr.port, snd_strerror(err));
- } else {
- printf("Subscribed MIDI port %d:%d to us.\n", addr.client, addr.port);
- }
-
- current_light_status.clear(); // The current state of the device is unknown.
- update_lights_lock_held();
+ num_subscribed_ports = num_subscribers;
+ update_highlights();
}
void MIDIMapper::match_controller(int controller, int field_number, int bank_field_number, float value, function<void(unsigned, float)> func)
void MIDIMapper::update_lights_lock_held()
{
- if (alsa_seq == nullptr || global_audio_mixer == nullptr) {
+ if (global_audio_mixer == nullptr) {
return;
}
}
}
- unsigned num_events = 0;
- for (unsigned note_num = 1; note_num <= 127; ++note_num) {
- bool active = active_lights.count(note_num);
- if (current_light_status.count(note_num) &&
- current_light_status[note_num] == active) {
- // Already known to be in the desired state.
- continue;
- }
-
- snd_seq_event_t ev;
- snd_seq_ev_clear(&ev);
-
- // Some devices drop events if we throw them onto them
- // too quickly. Add a 1 ms delay for each.
- snd_seq_real_time_t tm{0, num_events++ * 1000000};
- snd_seq_ev_schedule_real(&ev, alsa_queue_id, true, &tm);
- snd_seq_ev_set_source(&ev, 0);
- snd_seq_ev_set_subs(&ev);
-
- // For some reason, not all devices respond to note off.
- // Use note-on with velocity of 0 (which is equivalent) instead.
- snd_seq_ev_set_noteon(&ev, /*channel=*/0, note_num, active ? 1 : 0);
- WARN_ON_ERROR("snd_seq_event_output", snd_seq_event_output(alsa_seq, &ev));
- current_light_status[note_num] = active;
- }
- WARN_ON_ERROR("snd_seq_drain_output", snd_seq_drain_output(alsa_seq));
+ midi_device.update_lights(active_lights);
}
void MIDIMapper::activate_lights(unsigned bus_idx, int field_number, set<unsigned> *active_lights)
projects / nageru / commitdiff