#include "midi_mapper.h"
+
+#include "audio_mixer.h"
#include "midi_mapping.pb.h"
#include <alsa/asoundlib.h>
void MIDIMapper::set_midi_mapping(const MIDIMappingProto &new_mapping)
{
- lock_guard<mutex> lock(mapping_mu);
+ lock_guard<mutex> lock(mu);
if (mapping_proto) {
mapping_proto->CopyFrom(new_mapping);
} else {
const MIDIMappingProto &MIDIMapper::get_current_mapping() const
{
- lock_guard<mutex> lock(mapping_mu);
+ lock_guard<mutex> lock(mu);
return *mapping_proto;
}
ControllerReceiver *MIDIMapper::set_receiver(ControllerReceiver *new_receiver)
{
- lock_guard<mutex> lock(mapping_mu);
+ lock_guard<mutex> lock(mu);
swap(receiver, new_receiver);
return new_receiver; // Now old receiver.
}
} \
} 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()
{
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_WRITE |
- SND_SEQ_PORT_CAP_SUBS_WRITE,
+ 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));
+ 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));
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));
+ lock_guard<mutex> lock(mu);
+ subscribe_to_port_lock_held(seq, *snd_seq_port_info_get_addr(pinfo));
}
}
}
void MIDIMapper::handle_event(snd_seq_t *seq, snd_seq_event_t *event)
{
- lock_guard<mutex> lock(mapping_mu);
+ 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: {
printf("Controller %d changed to %d\n", event->data.control.param, event->data.control.value);
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();
}
}
bind(&ControllerReceiver::toggle_auto_makeup_gain, receiver));
}
case SND_SEQ_EVENT_PORT_START:
- subscribe_to_port(seq, event->data.addr);
+ 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);
}
}
-void MIDIMapper::subscribe_to_port(snd_seq_t *seq, const snd_seq_addr_t &addr)
+void MIDIMapper::subscribe_to_port_lock_held(snd_seq_t *seq, const snd_seq_addr_t &addr)
{
// Client 0 is basically the system; ignore it.
if (addr.client == 0) {
} 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();
}
void MIDIMapper::match_controller(int controller, int field_number, int bank_field_number, float value, function<void(unsigned, float)> func)
update_highlights();
}
+void MIDIMapper::refresh_lights()
+{
+ lock_guard<mutex> lock(mu);
+ update_lights_lock_held();
+}
+
void MIDIMapper::update_highlights()
{
// Global controllers.
bus_idx, MIDIMappingBusProto::kToggleCompressorFieldNumber, MIDIMappingProto::kToggleCompressorBankFieldNumber));
}
}
+
+void MIDIMapper::update_lights_lock_held()
+{
+ if (alsa_seq == nullptr || global_audio_mixer == nullptr) {
+ return;
+ }
+
+ set<unsigned> active_lights; // Desired state.
+ if (current_controller_bank == 0) {
+ activate_lights_all_buses(MIDIMappingBusProto::kBank1IsSelectedFieldNumber, &active_lights);
+ }
+ if (current_controller_bank == 1) {
+ activate_lights_all_buses(MIDIMappingBusProto::kBank2IsSelectedFieldNumber, &active_lights);
+ }
+ if (current_controller_bank == 2) {
+ activate_lights_all_buses(MIDIMappingBusProto::kBank3IsSelectedFieldNumber, &active_lights);
+ }
+ if (current_controller_bank == 3) {
+ activate_lights_all_buses(MIDIMappingBusProto::kBank4IsSelectedFieldNumber, &active_lights);
+ }
+ if (current_controller_bank == 4) {
+ activate_lights_all_buses(MIDIMappingBusProto::kBank5IsSelectedFieldNumber, &active_lights);
+ }
+ if (global_audio_mixer->get_limiter_enabled()) {
+ activate_lights_all_buses(MIDIMappingBusProto::kLimiterIsOnFieldNumber, &active_lights);
+ }
+ if (global_audio_mixer->get_final_makeup_gain_auto()) {
+ activate_lights_all_buses(MIDIMappingBusProto::kAutoMakeupGainIsOnFieldNumber, &active_lights);
+ }
+ unsigned num_buses = min<unsigned>(global_audio_mixer->num_buses(), mapping_proto->bus_mapping_size());
+ for (unsigned bus_idx = 0; bus_idx < num_buses; ++bus_idx) {
+ if (global_audio_mixer->get_locut_enabled(bus_idx)) {
+ activate_lights(bus_idx, MIDIMappingBusProto::kLocutIsOnFieldNumber, &active_lights);
+ }
+ if (global_audio_mixer->get_gain_staging_auto(bus_idx)) {
+ activate_lights(bus_idx, MIDIMappingBusProto::kAutoGainStagingIsOnFieldNumber, &active_lights);
+ }
+ if (global_audio_mixer->get_compressor_enabled(bus_idx)) {
+ activate_lights(bus_idx, MIDIMappingBusProto::kCompressorIsOnFieldNumber, &active_lights);
+ }
+ if (has_peaked[bus_idx]) {
+ activate_lights(bus_idx, MIDIMappingBusProto::kHasPeakedFieldNumber, &active_lights);
+ }
+ }
+
+ 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 ? 127 : 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));
+}
+
+void MIDIMapper::activate_lights(unsigned bus_idx, int field_number, set<unsigned> *active_lights)
+{
+ const MIDIMappingBusProto &bus_mapping = mapping_proto->bus_mapping(bus_idx);
+
+ const FieldDescriptor *descriptor = bus_mapping.GetDescriptor()->FindFieldByNumber(field_number);
+ const Reflection *bus_reflection = bus_mapping.GetReflection();
+ if (!bus_reflection->HasField(bus_mapping, descriptor)) {
+ return;
+ }
+ const MIDILightProto &light_proto =
+ static_cast<const MIDILightProto &>(bus_reflection->GetMessage(bus_mapping, descriptor));
+ active_lights->insert(light_proto.note_number());
+}
+
+void MIDIMapper::activate_lights_all_buses(int field_number, set<unsigned> *active_lights)
+{
+ 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);
+
+ const FieldDescriptor *descriptor = bus_mapping.GetDescriptor()->FindFieldByNumber(field_number);
+ const Reflection *bus_reflection = bus_mapping.GetReflection();
+ if (!bus_reflection->HasField(bus_mapping, descriptor)) {
+ continue;
+ }
+ const MIDILightProto &light_proto =
+ static_cast<const MIDILightProto &>(bus_reflection->GetMessage(bus_mapping, descriptor));
+ active_lights->insert(light_proto.note_number());
+ }
+}
projects / nageru / blobdiff