+void
+PluginInsert::bypass (BufferSet& bufs, pframes_t nframes)
+{
+ /* bypass the plugin(s) not the whole processor.
+ * -> use mappings just like connect_and_run
+ */
+
+ // TODO: atomically copy maps & _no_inplace
+ ChanMapping in_map (input_map ());
+ ChanMapping out_map (output_map ());
+ if (_mapping_changed) {
+ _no_inplace = check_inplace ();
+ _mapping_changed = false;
+ }
+
+ bufs.set_count(ChanCount::max(bufs.count(), _configured_internal));
+ bufs.set_count(ChanCount::max(bufs.count(), _configured_out));
+
+ if (_no_inplace) {
+ ChanMapping thru_map (_thru_map);
+
+ BufferSet& inplace_bufs = _session.get_noinplace_buffers();
+ // copy all inputs
+ for (DataType::iterator t = DataType::begin(); t != DataType::end(); ++t) {
+ for (uint32_t in = 0; in < _configured_internal.get (*t); ++in) {
+ inplace_bufs.get (*t, in).read_from (bufs.get (*t, in), nframes, 0, 0);
+ }
+ }
+ ARDOUR::ChanMapping used_outputs;
+ // copy thru
+ for (DataType::iterator t = DataType::begin(); t != DataType::end(); ++t) {
+ for (uint32_t out = 0; out < _configured_out.get (*t); ++out) {
+ bool valid;
+ uint32_t in_idx = thru_map.get (*t, out, &valid);
+ if (valid) {
+ bufs.get (*t, out).read_from (inplace_bufs.get (*t, in_idx), nframes, 0, 0);
+ used_outputs.set (*t, out, 1); // mark as used
+ }
+ }
+ }
+ // plugin no-op: assume every plugin has an internal identity map
+ for (DataType::iterator t = DataType::begin(); t != DataType::end(); ++t) {
+ for (uint32_t out = 0; out < _configured_out.get (*t); ++out) {
+ bool valid;
+ uint32_t src_idx = out_map.get_src (*t, out, &valid);
+ if (!valid) {
+ continue;
+ }
+ uint32_t in_idx = in_map.get (*t, src_idx, &valid);
+ if (!valid) {
+ continue;
+ }
+ bufs.get (*t, out).read_from (inplace_bufs.get (*t, in_idx), nframes, 0, 0);
+ used_outputs.set (*t, out, 1); // mark as used
+ }
+ }
+ // now silence all unused outputs
+ if (has_midi_bypass ()) {
+ used_outputs.set (DataType::MIDI, 0, 1); // Midi bypass.
+ }
+ for (DataType::iterator t = DataType::begin(); t != DataType::end(); ++t) {
+ for (uint32_t out = 0; out < _configured_out.get (*t); ++out) {
+ bool valid;
+ used_outputs.get (*t, out, &valid);
+ if (!valid) {
+ bufs.get (*t, out).silence (nframes, 0);
+ }
+ }
+ }
+ } else {
+ if (_match.method == Split) {
+ for (DataType::iterator t = DataType::begin(); t != DataType::end(); ++t) {
+ if (_configured_internal.get (*t) == 0) {
+ continue;
+ }
+ // copy/feeds _all_ *connected* inputs, copy the first buffer
+ bool valid;
+ uint32_t first_idx = in_map.get (*t, 0, &valid);
+ assert (valid && first_idx == 0); // check_inplace ensures this
+ for (uint32_t i = 1; i < natural_input_streams ().get (*t); ++i) {
+ uint32_t idx = in_map.get (*t, i, &valid);
+ if (valid) {
+ assert (idx == 0);
+ bufs.get (*t, i).read_from (bufs.get (*t, first_idx), nframes, 0, 0);
+ }
+ }
+ }
+ }
+
+ // apply output map and/or monotonic but not identity i/o mappings
+ for (DataType::iterator t = DataType::begin(); t != DataType::end(); ++t) {
+ for (uint32_t out = 0; out < _configured_out.get (*t); ++out) {
+ bool valid;
+ uint32_t src_idx = out_map.get_src (*t, out, &valid);
+ if (!valid) {
+ bufs.get (*t, out).silence (nframes, 0);
+ continue;
+ }
+ uint32_t in_idx = in_map.get (*t, src_idx, &valid);
+ if (!valid) {
+ bufs.get (*t, out).silence (nframes, 0);
+ continue;
+ }
+ if (in_idx != src_idx) {
+ bufs.get (*t, out).read_from (bufs.get (*t, in_idx), nframes, 0, 0);
+ }
+ }
+ }
+ }
+}
+