static void
run(LV2_Handle handle, uint32_t n_samples)
{
SiSco* self = (SiSco*)handle;
const uint32_t size = (sizeof(float) * n_samples + 80) * self->n_channels;
const uint32_t capacity = self->notify->atom.size;
bool capacity_ok = true;
/* check if atom-port buffer is large enough to hold
* all audio-samples and configuration settings */
if (capacity < size + 216 + self->n_channels * 16) {
capacity_ok = false;
if (!self->printed_capacity_warning) {
fprintf(stderr, "SiSco.lv2 error: LV2 comm-buffersize is insufficient %d/%d bytes.\n",
capacity, size + 216 + self->n_channels * 16);
self->printed_capacity_warning = true;
}
}
/* prepare forge buffer and initialize atom-sequence */
lv2_atom_forge_set_buffer(&self->forge, (uint8_t*)self->notify, capacity);
lv2_atom_forge_sequence_head(&self->forge, &self->frame, 0);
/* Send settings to UI */
if (self->send_settings_to_ui && self->ui_active) {
self->send_settings_to_ui = false;
/* forge container object of type 'ui_state' */
LV2_Atom_Forge_Frame frame;
lv2_atom_forge_frame_time(&self->forge, 0);
x_forge_object(&self->forge, &frame, 1, self->uris.ui_state);
/* forge attributes for 'ui_state' */
lv2_atom_forge_property_head(&self->forge, self->uris.samplerate, 0);
lv2_atom_forge_float(&self->forge, capacity_ok ? self->rate : 0);
lv2_atom_forge_property_head(&self->forge, self->uris.ui_state_grid, 0);
lv2_atom_forge_int(&self->forge, self->ui_grid);
lv2_atom_forge_property_head(&self->forge, self->uris.ui_state_trig, 0);
lv2_atom_forge_vector(&self->forge, sizeof(float), self->uris.atom_Float,
sizeof(struct triggerstate) / sizeof(float), &self->triggerstate);
lv2_atom_forge_property_head(&self->forge, self->uris.ui_state_curs, 0);
lv2_atom_forge_vector(&self->forge, sizeof(int32_t), self->uris.atom_Int,
sizeof(struct cursorstate) / sizeof(int32_t), &self->cursorstate);
lv2_atom_forge_property_head(&self->forge, self->uris.ui_state_chn, 0);
lv2_atom_forge_vector(&self->forge, sizeof(float), self->uris.atom_Float,
self->n_channels * sizeof(struct channelstate) / sizeof(float), self->channelstate);
lv2_atom_forge_property_head(&self->forge, self->uris.ui_state_misc, 0);
lv2_atom_forge_int(&self->forge, self->ui_misc);
/* close-off frame */
lv2_atom_forge_pop(&self->forge, &frame);
}
/* Process incoming events from GUI */
if (self->control) {
LV2_Atom_Event* ev = lv2_atom_sequence_begin(&(self->control)->body);
/* for each message from UI... */
while(!lv2_atom_sequence_is_end(&(self->control)->body, (self->control)->atom.size, ev)) {
/* .. only look at atom-events.. */
if (ev->body.type == self->uris.atom_Blank || ev->body.type == self->uris.atom_Object) {
const LV2_Atom_Object* obj = (LV2_Atom_Object*)&ev->body;
/* interpret atom-objects: */
if (obj->body.otype == self->uris.ui_on) {
/* UI was activated */
self->ui_active = true;
self->send_settings_to_ui = true;
} else if (obj->body.otype == self->uris.ui_off) {
/* UI was closed */
self->ui_active = false;
} else if (obj->body.otype == self->uris.ui_state) {
/* UI sends current settings */
const LV2_Atom* grid = NULL;
const LV2_Atom* trig = NULL;
const LV2_Atom* curs = NULL;
const LV2_Atom* misc = NULL;
const LV2_Atom* chn = NULL;
lv2_atom_object_get(obj,
self->uris.ui_state_grid, &grid,
self->uris.ui_state_trig, &trig,
self->uris.ui_state_curs, &curs,
self->uris.ui_state_misc, &misc,
self->uris.ui_state_chn, &chn,
0);
if (grid && grid->type == self->uris.atom_Int) {
self->ui_grid = ((LV2_Atom_Int*)grid)->body;
}
if (misc && misc->type == self->uris.atom_Int) {
self->ui_misc = ((LV2_Atom_Int*)misc)->body;
}
if (trig && trig->type == self->uris.atom_Vector) {
LV2_Atom_Vector *vof = (LV2_Atom_Vector*)LV2_ATOM_BODY(trig);
if (vof->atom.type == self->uris.atom_Float) {
struct triggerstate *ts = (struct triggerstate *) LV2_ATOM_BODY(&vof->atom);
memcpy(&self->triggerstate, ts, sizeof(struct triggerstate));
}
}
if (curs && curs->type == self->uris.atom_Vector) {
LV2_Atom_Vector *vof = (LV2_Atom_Vector*)LV2_ATOM_BODY(curs);
if (vof->atom.type == self->uris.atom_Int) {
struct cursorstate *cs = (struct cursorstate *) LV2_ATOM_BODY(&vof->atom);
memcpy(&self->cursorstate, cs, sizeof(struct cursorstate));
}
}
if (chn && chn->type == self->uris.atom_Vector) {
LV2_Atom_Vector *vof = (LV2_Atom_Vector*)LV2_ATOM_BODY(chn);
if (vof->atom.type == self->uris.atom_Float) {
struct channelstate *cs = (struct channelstate *) LV2_ATOM_BODY(&vof->atom);
memcpy(self->channelstate, cs, self->n_channels * sizeof(struct channelstate));
}
}
}
}
ev = lv2_atom_sequence_next(ev);
}
}
/* process audio data */
for (uint32_t c = 0; c < self->n_channels; ++c) {
if (self->ui_active && capacity_ok) {
/* if UI is active, send raw audio data to UI */
tx_rawaudio(&self->forge, &self->uris, c, n_samples, self->input[c]);
}
/* if not processing in-place, forward audio */
if (self->input[c] != self->output[c]) {
memcpy(self->output[c], self->input[c], sizeof(float) * n_samples);
}
}
/* close off atom-sequence */
lv2_atom_forge_pop(&self->forge, &self->frame);
}
/** ==== Run Method ==== */
static void
run(LV2_Handle handle, uint32_t n_samples)
{
EgScope* self = (EgScope*)handle;
/* Ensure notify port buffer is large enough to hold all audio-samples and
configuration settings. A minimum size was requested in the .ttl file,
but check here just to be sure.
TODO: Explain these magic numbers.
*/
const size_t size = (sizeof(float) * n_samples + 64) * self->n_channels;
const uint32_t space = self->notify->atom.size;
if (space < size + 128) {
/* Insufficient space, report error and do nothing. Note that a
real-time production plugin mustn't call log functions in run(), but
this can be useful for debugging and example purposes.
*/
lv2_log_error(&self->logger, "Buffer size is insufficient\n");
return;
}
// Prepare forge buffer and initialize atom-sequence
lv2_atom_forge_set_buffer(&self->forge, (uint8_t*)self->notify, space);
lv2_atom_forge_sequence_head(&self->forge, &self->frame, 0);
/* Send settings to UI
The plugin can continue to run while the UI is closed and re-opened.
The state and settings of the UI are kept here and transmitted to the UI
every time it asks for them or if the user initializes a 'load preset'.
*/
if (self->send_settings_to_ui && self->ui_active) {
self->send_settings_to_ui = false;
// Forge container object of type 'ui_state'
LV2_Atom_Forge_Frame frame;
lv2_atom_forge_frame_time(&self->forge, 0);
lv2_atom_forge_object(&self->forge, &frame, 0, self->uris.ui_State);
// Add UI state as properties
lv2_atom_forge_key(&self->forge, self->uris.ui_spp);
lv2_atom_forge_int(&self->forge, self->ui_spp);
lv2_atom_forge_key(&self->forge, self->uris.ui_amp);
lv2_atom_forge_float(&self->forge, self->ui_amp);
lv2_atom_forge_key(&self->forge, self->uris.param_sampleRate);
lv2_atom_forge_float(&self->forge, self->rate);
lv2_atom_forge_pop(&self->forge, &frame);
}
// Process incoming events from GUI
if (self->control) {
const LV2_Atom_Event* ev = lv2_atom_sequence_begin(
&(self->control)->body);
// For each incoming message...
while (!lv2_atom_sequence_is_end(
&self->control->body, self->control->atom.size, ev)) {
// If the event is an atom:Blank object
if (ev->body.type == self->uris.atom_Blank) {
const LV2_Atom_Object* obj = (const LV2_Atom_Object*)&ev->body;
if (obj->body.otype == self->uris.ui_On) {
// If the object is a ui-on, the UI was activated
self->ui_active = true;
self->send_settings_to_ui = true;
} else if (obj->body.otype == self->uris.ui_Off) {
// If the object is a ui-off, the UI was closed
self->ui_active = false;
} else if (obj->body.otype == self->uris.ui_State) {
// If the object is a ui-state, it's the current UI settings
const LV2_Atom* spp = NULL;
const LV2_Atom* amp = NULL;
lv2_atom_object_get(obj, self->uris.ui_spp, &spp,
self->uris.ui_amp, &,
0);
if (spp) {
self->ui_spp = ((const LV2_Atom_Int*)spp)->body;
}
if (amp) {
self->ui_amp = ((const LV2_Atom_Float*)amp)->body;
}
}
}
ev = lv2_atom_sequence_next(ev);
}
}
// Process audio data
for (uint32_t c = 0; c < self->n_channels; ++c) {
if (self->ui_active) {
// If UI is active, send raw audio data to UI
tx_rawaudio(&self->forge, &self->uris, c, n_samples, self->input[c]);
}
// If not processing audio in-place, forward audio
if (self->input[c] != self->output[c]) {
memcpy(self->output[c], self->input[c], sizeof(float) * n_samples);
}
}
// Close off sequence
lv2_atom_forge_pop(&self->forge, &self->frame);
}
