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-rw-r--r--plugins/eg-midigate.lv2/midigate.c224
1 files changed, 110 insertions, 114 deletions
diff --git a/plugins/eg-midigate.lv2/midigate.c b/plugins/eg-midigate.lv2/midigate.c
index 5bffeea..5379440 100644
--- a/plugins/eg-midigate.lv2/midigate.c
+++ b/plugins/eg-midigate.lv2/midigate.c
@@ -32,27 +32,27 @@
#define MIDIGATE_URI "http://lv2plug.in/plugins/eg-midigate"
typedef enum {
- MIDIGATE_CONTROL = 0,
- MIDIGATE_IN = 1,
- MIDIGATE_OUT = 2
+ MIDIGATE_CONTROL = 0,
+ MIDIGATE_IN = 1,
+ MIDIGATE_OUT = 2
} PortIndex;
typedef struct {
- // Port buffers
- const LV2_Atom_Sequence* control;
- const float* in;
- float* out;
+ // Port buffers
+ const LV2_Atom_Sequence* control;
+ const float* in;
+ float* out;
- // Features
- LV2_URID_Map* map;
- LV2_Log_Logger logger;
+ // Features
+ LV2_URID_Map* map;
+ LV2_Log_Logger logger;
- struct {
- LV2_URID midi_MidiEvent;
- } uris;
+ struct {
+ LV2_URID midi_MidiEvent;
+ } uris;
- unsigned n_active_notes;
- unsigned program; // 0 = normal, 1 = inverted
+ unsigned n_active_notes;
+ unsigned program; // 0 = normal, 1 = inverted
} Midigate;
static LV2_Handle
@@ -61,59 +61,57 @@ instantiate(const LV2_Descriptor* descriptor,
const char* bundle_path,
const LV2_Feature* const* features)
{
- Midigate* self = (Midigate*)calloc(1, sizeof(Midigate));
- if (!self) {
- return NULL;
- }
-
- // Scan host features for URID map
- // clang-format off
- const char* missing = lv2_features_query(
- features,
- LV2_LOG__log, &self->logger.log, false,
- LV2_URID__map, &self->map, true,
- NULL);
- // clang-format on
-
- lv2_log_logger_set_map(&self->logger, self->map);
- if (missing) {
- lv2_log_error(&self->logger, "Missing feature <%s>\n", missing);
- free(self);
- return NULL;
- }
-
- self->uris.midi_MidiEvent = self->map->map(
- self->map->handle, LV2_MIDI__MidiEvent);
-
- return (LV2_Handle)self;
+ Midigate* self = (Midigate*)calloc(1, sizeof(Midigate));
+ if (!self) {
+ return NULL;
+ }
+
+ // Scan host features for URID map
+ // clang-format off
+ const char* missing = lv2_features_query(
+ features,
+ LV2_LOG__log, &self->logger.log, false,
+ LV2_URID__map, &self->map, true,
+ NULL);
+ // clang-format on
+
+ lv2_log_logger_set_map(&self->logger, self->map);
+ if (missing) {
+ lv2_log_error(&self->logger, "Missing feature <%s>\n", missing);
+ free(self);
+ return NULL;
+ }
+
+ self->uris.midi_MidiEvent =
+ self->map->map(self->map->handle, LV2_MIDI__MidiEvent);
+
+ return (LV2_Handle)self;
}
static void
-connect_port(LV2_Handle instance,
- uint32_t port,
- void* data)
+connect_port(LV2_Handle instance, uint32_t port, void* data)
{
- Midigate* self = (Midigate*)instance;
-
- switch ((PortIndex)port) {
- case MIDIGATE_CONTROL:
- self->control = (const LV2_Atom_Sequence*)data;
- break;
- case MIDIGATE_IN:
- self->in = (const float*)data;
- break;
- case MIDIGATE_OUT:
- self->out = (float*)data;
- break;
- }
+ Midigate* self = (Midigate*)instance;
+
+ switch ((PortIndex)port) {
+ case MIDIGATE_CONTROL:
+ self->control = (const LV2_Atom_Sequence*)data;
+ break;
+ case MIDIGATE_IN:
+ self->in = (const float*)data;
+ break;
+ case MIDIGATE_OUT:
+ self->out = (float*)data;
+ break;
+ }
}
static void
activate(LV2_Handle instance)
{
- Midigate* self = (Midigate*)instance;
- self->n_active_notes = 0;
- self->program = 0;
+ Midigate* self = (Midigate*)instance;
+ self->n_active_notes = 0;
+ self->program = 0;
}
/**
@@ -124,14 +122,13 @@ activate(LV2_Handle instance)
static void
write_output(Midigate* self, uint32_t offset, uint32_t len)
{
- const bool active = (self->program == 0)
- ? (self->n_active_notes > 0)
- : (self->n_active_notes == 0);
- if (active) {
- memcpy(self->out + offset, self->in + offset, len * sizeof(float));
- } else {
- memset(self->out + offset, 0, len * sizeof(float));
- }
+ const bool active = (self->program == 0) ? (self->n_active_notes > 0)
+ : (self->n_active_notes == 0);
+ if (active) {
+ memcpy(self->out + offset, self->in + offset, len * sizeof(float));
+ } else {
+ memset(self->out + offset, 0, len * sizeof(float));
+ }
}
/**
@@ -159,40 +156,41 @@ write_output(Midigate* self, uint32_t offset, uint32_t len)
static void
run(LV2_Handle instance, uint32_t sample_count)
{
- Midigate* self = (Midigate*)instance;
- uint32_t offset = 0;
-
- LV2_ATOM_SEQUENCE_FOREACH(self->control, ev) {
- if (ev->body.type == self->uris.midi_MidiEvent) {
- const uint8_t* const msg = (const uint8_t*)(ev + 1);
- switch (lv2_midi_message_type(msg)) {
- case LV2_MIDI_MSG_NOTE_ON:
- ++self->n_active_notes;
- break;
- case LV2_MIDI_MSG_NOTE_OFF:
- if (self->n_active_notes > 0) {
- --self->n_active_notes;
- }
- break;
- case LV2_MIDI_MSG_CONTROLLER:
- if (msg[1] == LV2_MIDI_CTL_ALL_NOTES_OFF) {
- self->n_active_notes = 0;
- }
- break;
- case LV2_MIDI_MSG_PGM_CHANGE:
- if (msg[1] == 0 || msg[1] == 1) {
- self->program = msg[1];
- }
- break;
- default: break;
- }
- }
-
- write_output(self, offset, ev->time.frames - offset);
- offset = (uint32_t)ev->time.frames;
- }
-
- write_output(self, offset, sample_count - offset);
+ Midigate* self = (Midigate*)instance;
+ uint32_t offset = 0;
+
+ LV2_ATOM_SEQUENCE_FOREACH (self->control, ev) {
+ if (ev->body.type == self->uris.midi_MidiEvent) {
+ const uint8_t* const msg = (const uint8_t*)(ev + 1);
+ switch (lv2_midi_message_type(msg)) {
+ case LV2_MIDI_MSG_NOTE_ON:
+ ++self->n_active_notes;
+ break;
+ case LV2_MIDI_MSG_NOTE_OFF:
+ if (self->n_active_notes > 0) {
+ --self->n_active_notes;
+ }
+ break;
+ case LV2_MIDI_MSG_CONTROLLER:
+ if (msg[1] == LV2_MIDI_CTL_ALL_NOTES_OFF) {
+ self->n_active_notes = 0;
+ }
+ break;
+ case LV2_MIDI_MSG_PGM_CHANGE:
+ if (msg[1] == 0 || msg[1] == 1) {
+ self->program = msg[1];
+ }
+ break;
+ default:
+ break;
+ }
+ }
+
+ write_output(self, offset, ev->time.frames - offset);
+ offset = (uint32_t)ev->time.frames;
+ }
+
+ write_output(self, offset, sample_count - offset);
}
/**
@@ -207,7 +205,7 @@ deactivate(LV2_Handle instance)
static void
cleanup(LV2_Handle instance)
{
- free(instance);
+ free(instance);
}
/**
@@ -216,23 +214,21 @@ cleanup(LV2_Handle instance)
static const void*
extension_data(const char* uri)
{
- return NULL;
+ return NULL;
}
-static const LV2_Descriptor descriptor = {
- MIDIGATE_URI,
- instantiate,
- connect_port,
- activate,
- run,
- deactivate,
- cleanup,
- extension_data
-};
+static const LV2_Descriptor descriptor = {MIDIGATE_URI,
+ instantiate,
+ connect_port,
+ activate,
+ run,
+ deactivate,
+ cleanup,
+ extension_data};
LV2_SYMBOL_EXPORT
const LV2_Descriptor*
lv2_descriptor(uint32_t index)
{
- return index == 0 ? &descriptor : NULL;
+ return index == 0 ? &descriptor : NULL;
}