eg-sampler: Support patch:Get, and request initial state from UI.

3 files changed, 23 insertions, 3 deletions

diff --git a/plugins/eg-sampler.lv2/sampler.c b/plugins/eg-sampler.lv2/sampler.c
index 54da799..0471a90 100644
--- a/plugins/eg-sampler.lv2/sampler.c
+++ b/plugins/eg-sampler.lv2/sampler.c
@@ -350,6 +350,13 @@ run(LV2_Handle instance,
 				self->schedule->schedule_work(self->schedule->handle,
 				                              lv2_atom_total_size(&ev->body),
 				                              &ev->body);
+			} else if (obj->body.otype == uris->patch_Get) {
+				// Received a get message, emit our state (probably to UI)
+				lv2_log_trace(&self->logger, "Responding to get request\n");
+				lv2_atom_forge_frame_time(&self->forge, self->frame_offset);
+				write_set_file(&self->forge, &self->uris,
+				               self->sample->path,
+				               self->sample->path_len);
 			} else {
 				lv2_log_trace(&self->logger,
 				              "Unknown object type %d\n", obj->body.otype);
diff --git a/plugins/eg-sampler.lv2/sampler_ui.c b/plugins/eg-sampler.lv2/sampler_ui.c
index d691c98..643f8c7 100644
--- a/plugins/eg-sampler.lv2/sampler_ui.c
+++ b/plugins/eg-sampler.lv2/sampler_ui.c
@@ -131,6 +131,19 @@ instantiate(const LV2UI_Descriptor*   descriptor,
 	                 G_CALLBACK(on_load_clicked),
 	                 ui);
 
+	// Request state (filename) from plugin
+	uint8_t get_buf[512];
+	lv2_atom_forge_set_buffer(&ui->forge, get_buf, sizeof(get_buf));
+	
+	LV2_Atom_Forge_Frame frame;
+	LV2_Atom*            msg = (LV2_Atom*)lv2_atom_forge_object(
+		&ui->forge, &frame, 0, ui->uris.patch_Get);
+	lv2_atom_forge_pop(&ui->forge, &frame);
+
+	ui->write(ui->controller, 0, lv2_atom_total_size(msg),
+	          ui->uris.atom_eventTransfer,
+	          msg);
+
 	*widget = ui->box;
 
 	return ui;
@@ -154,7 +167,7 @@ port_event(LV2UI_Handle handle,
 	SamplerUI* ui = (SamplerUI*)handle;
 	if (format == ui->uris.atom_eventTransfer) {
 		const LV2_Atom* atom = (const LV2_Atom*)buffer;
-		if (atom->type == ui->uris.atom_Blank) {
+		if (lv2_atom_forge_is_object_type(&ui->forge, atom->type)) {
 			const LV2_Atom_Object* obj      = (const LV2_Atom_Object*)atom;
 			const LV2_Atom*        file_uri = read_set_file(&ui->uris, obj);
 			if (!file_uri) {
diff --git a/plugins/eg-sampler.lv2/uris.h b/plugins/eg-sampler.lv2/uris.h
index 8e9faee..c21c6c8 100644
--- a/plugins/eg-sampler.lv2/uris.h
+++ b/plugins/eg-sampler.lv2/uris.h
@@ -28,7 +28,6 @@
 #define EG_SAMPLER__freeSample  EG_SAMPLER_URI "#freeSample"
 
 typedef struct {
-	LV2_URID atom_Blank;
 	LV2_URID atom_Path;
 	LV2_URID atom_Resource;
 	LV2_URID atom_Sequence;
@@ -38,6 +37,7 @@ typedef struct {
 	LV2_URID eg_sample;
 	LV2_URID eg_freeSample;
 	LV2_URID midi_Event;
+	LV2_URID patch_Get;
 	LV2_URID patch_Set;
 	LV2_URID patch_property;
 	LV2_URID patch_value;
@@ -46,7 +46,6 @@ typedef struct {
 static inline void
 map_sampler_uris(LV2_URID_Map* map, SamplerURIs* uris)
 {
-	uris->atom_Blank         = map->map(map->handle, LV2_ATOM__Blank);
 	uris->atom_Path          = map->map(map->handle, LV2_ATOM__Path);
 	uris->atom_Resource      = map->map(map->handle, LV2_ATOM__Resource);
 	uris->atom_Sequence      = map->map(map->handle, LV2_ATOM__Sequence);
@@ -56,6 +55,7 @@ map_sampler_uris(LV2_URID_Map* map, SamplerURIs* uris)
 	uris->eg_freeSample      = map->map(map->handle, EG_SAMPLER__freeSample);
 	uris->eg_sample          = map->map(map->handle, EG_SAMPLER__sample);
 	uris->midi_Event         = map->map(map->handle, LV2_MIDI__MidiEvent);
+	uris->patch_Get          = map->map(map->handle, LV2_PATCH__Get);
 	uris->patch_Set          = map->map(map->handle, LV2_PATCH__Set);
 	uris->patch_property     = map->map(map->handle, LV2_PATCH__property);
 	uris->patch_value        = map->map(map->handle, LV2_PATCH__value);