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Add state support and startup state polling for the ui

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This commit is contained in:
Nick Lanham
2012-03-25 18:10:49 +02:00
parent dc2872309c
commit 1715d437e9
5 changed files with 153 additions and 8 deletions
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105
drmr.c
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@@ -159,12 +159,26 @@ connect_port(LV2_Handle instance,
}
}
static inline LV2_Atom* build_update_message(DrMr *drmr, const char* kit) {
static inline LV2_Atom *build_update_message(DrMr *drmr) {
LV2_Atom_Forge_Frame set_frame;
LV2_Atom* msg = (LV2_Atom*)lv2_atom_forge_resource
(&drmr->forge, &set_frame, 1, drmr->uris.ui_msg);
lv2_atom_forge_property_head(&drmr->forge, drmr->uris.kit_path,0);
lv2_atom_forge_string(&drmr->forge, kit, strlen(kit));
if (drmr->current_path) {
lv2_atom_forge_property_head(&drmr->forge, drmr->uris.kit_path,0);
lv2_atom_forge_string(&drmr->forge, drmr->current_path, strlen(drmr->current_path));
}
lv2_atom_forge_pop(&drmr->forge,&set_frame);
return msg;
}
static inline LV2_Atom *build_state_message(DrMr *drmr) {
LV2_Atom_Forge_Frame set_frame;
LV2_Atom* msg = (LV2_Atom*)lv2_atom_forge_resource
(&drmr->forge, &set_frame, 1, drmr->uris.get_state);
if (drmr->current_path) {
lv2_atom_forge_property_head(&drmr->forge, drmr->uris.kit_path,0);
lv2_atom_forge_string(&drmr->forge, drmr->current_path, strlen(drmr->current_path));
}
lv2_atom_forge_pop(&drmr->forge,&set_frame);
return msg;
}
@@ -257,6 +271,10 @@ static void run(LV2_Handle instance, uint32_t n_samples) {
drmr->curReq = reqPos;
if (tmp) free(tmp);
}
} else if (obj->body.otype == drmr->uris.get_state) {
lv2_atom_forge_frame_time(&drmr->forge, 0);
build_state_message(drmr);
printf("Sent state message: %s\n",drmr->current_path);
}
}
else printf("unrecognized event\n");
@@ -272,7 +290,8 @@ static void run(LV2_Handle instance, uint32_t n_samples) {
if (current_kit_changed) {
current_kit_changed = 0;
lv2_atom_forge_frame_time(&drmr->forge, 0);
build_update_message(drmr,drmr->current_path);
build_update_message(drmr);
printf("Sent current path message\n");
}
lv2_atom_forge_pop(&drmr->forge, &seq_frame);
@@ -330,7 +349,85 @@ static void cleanup(LV2_Handle instance) {
free(instance);
}
void save_state(LV2_Handle instance,
LV2_State_Store_Function store,
void* handle,
uint32_t flags,
const LV2_Feature *const * features) {
DrMr *drmr = (DrMr*)instance;
LV2_State_Map_Path* map_path = NULL;
while(*features) {
if (!strcmp((*features)->URI, LV2_STATE__mapPath))
map_path = (LV2_State_Map_Path*)((*features)->data);
features++;
}
if (map_path == NULL) {
fprintf(stderr,"Host does not support map_path, cannot save state\n");
return;
}
char* mapped_path = map_path->abstract_path(map_path->handle,
drmr->current_path);
if (store(handle,
drmr->uris.kit_path,
mapped_path,
strlen(mapped_path) + 1,
drmr->uris.string_urid,
LV2_STATE_IS_POD | LV2_STATE_IS_PORTABLE)) {
printf("Store failed\n");
}
}
void restore_state(LV2_Handle instance,
LV2_State_Retrieve_Function retrieve,
void* handle,
uint32_t flags,
const LV2_Feature *const * features) {
DrMr* drmr = (DrMr*)instance;
size_t size;
uint32_t type;
uint32_t fgs;
LV2_State_Map_Path* map_path = NULL;
while(*features) {
if (!strcmp((*features)->URI, LV2_STATE__mapPath))
map_path = (LV2_State_Map_Path*)((*features)->data);
features++;
}
if (map_path == NULL) {
fprintf(stderr,"Host does not support map_path, cannot restore state\n");
return;
}
const char* abstract_path =
retrieve(handle, drmr->uris.kit_path, &size, &type, &fgs);
if (!abstract_path) {
fprintf(stderr,"Found no path in state, not restoring\n");
return;
}
char *kit_path = map_path->absolute_path(map_path->handle,abstract_path);
if (kit_path) { // safe as we're in "Instantiation" threading class
int reqPos = (drmr->curReq+1)%REQ_BUF_SIZE;
char *tmp = NULL;
if (reqPos >= 0 && drmr->request_buf[reqPos])
tmp = drmr->request_buf[reqPos];
drmr->request_buf[reqPos] = strdup(kit_path);
drmr->curReq = reqPos;
if (tmp) free(tmp);
}
}
static const void* extension_data(const char* uri) {
static const LV2_State_Interface state_iface = { save_state, restore_state };
if (!strcmp(uri, LV2_STATE_URI "#Interface")) return &state_iface;
return NULL;
}