void
TimeNode::run(ProcessContext& context)
{
BufferRef buf = _notify_port->buffer(0);
LV2_Atom_Sequence* seq = buf->get<LV2_Atom_Sequence>();
// Initialise output to the empty sequence
seq->atom.type = _notify_port->bufs().uris().atom_Sequence;
seq->atom.size = sizeof(LV2_Atom_Sequence_Body);
seq->body.unit = 0;
seq->body.pad = 0;
// Ask the driver to append any time events for this cycle
context.engine().driver()->append_time_events(
context, *_notify_port->buffer(0));
}
void
DelayNode::run(ProcessContext& context)
{
Buffer* const delay_buf = _delay_port->buffer(0).get();
Buffer* const in_buf = _in_port->buffer(0).get();
Buffer* const out_buf = _out_port->buffer(0).get();
DelayNode* plugin_data = this;
const float* const in = in_buf->samples();
float* const out = out_buf->samples();
const float delay_time = delay_buf->samples()[0];
const uint32_t buffer_mask = plugin_data->_buffer_mask;
const SampleRate sample_rate = context.engine().driver()->sample_rate();
float delay_samples = plugin_data->_delay_samples;
int64_t write_phase = plugin_data->_write_phase;
const uint32_t sample_count = context.nframes();
if (write_phase == 0) {
_last_delay_time = delay_time;
_delay_samples = delay_samples = CALC_DELAY(delay_time);
}
if (delay_time == _last_delay_time) {
const int64_t idelay_samples = (int64_t)delay_samples;
const float frac = delay_samples - idelay_samples;
for (uint32_t i = 0; i < sample_count; i++) {
int64_t read_phase = write_phase - (int64_t)delay_samples;
const float read = cube_interp(frac,
buffer_at(read_phase - 1),
buffer_at(read_phase),
buffer_at(read_phase + 1),
buffer_at(read_phase + 2));
buffer_at(write_phase++) = in[i];
out[i] = read;
}
} else {
const float next_delay_samples = CALC_DELAY(delay_time);
const float delay_samples_slope = (next_delay_samples - delay_samples) / sample_count;
for (uint32_t i = 0; i < sample_count; i++) {
delay_samples += delay_samples_slope;
write_phase++;
const int64_t read_phase = write_phase - (int64_t)delay_samples;
const int64_t idelay_samples = (int64_t)delay_samples;
const float frac = delay_samples - idelay_samples;
const float read = cube_interp(frac,
buffer_at(read_phase - 1),
buffer_at(read_phase),
buffer_at(read_phase + 1),
buffer_at(read_phase + 2));
buffer_at(write_phase) = in[i];
out[i] = read;
}
_last_delay_time = delay_time;
_delay_samples = delay_samples;
}
_write_phase = write_phase;
}