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VST3: yet another attempt at setting speaker arr to configure busses

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Robin Gareus 2026-01-28 18:50:26 +01:00
parent f9f74f3d8f
commit 45e53ea809
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GPG key ID: A090BCE02CF57F04
2 changed files with 56 additions and 20 deletions
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3
libs/ardour/ardour/vst3_plugin.h
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@ -353,6 +353,9 @@ private:
std::map<int, AudioBusInfo> _bus_info_in;
std::map<int, AudioBusInfo> _bus_info_out;
std::map<int, int32_t> _bus_channel_cnt_in;
std::map<int, int32_t> _bus_channel_cnt_out;
int _n_inputs;
int _n_outputs;
int _n_aux_inputs;

73
libs/ardour/vst3_plugin.cc
View file

@ -1295,6 +1295,25 @@ VST3PI::VST3PI (std::shared_ptr<ARDOUR::VST3PluginModule> m, std::string unique_
query_io_config ();
}
/* cache default bus width, later calls to setBusArrangements will change these */
for (int32 i = 0; i < _n_bus_in; ++i) {
Vst::BusInfo bus;
if (_component->getBusInfo (Vst::kAudio, Vst::kInput, i, bus) == kResultTrue) {
_bus_channel_cnt_in[i] = bus.channelCount;
} else {
_bus_channel_cnt_in[i] = 0;
}
}
for (int32 i = 0; i < _n_bus_out; ++i) {
Vst::BusInfo bus;
if (_component->getBusInfo (Vst::kAudio, Vst::kOutput, i, bus) == kResultTrue) {
_bus_channel_cnt_out[i] = bus.channelCount;
} else {
_bus_channel_cnt_out[i] = 0;
}
}
init_output_configuration ();
if (!connect_components ()) {
@ -2304,8 +2323,6 @@ VST3PI::set_event_bus_state (bool enable)
void
VST3PI::request_bus_layout (uint32_t in, uint32_t aux_in, uint32_t out)
{
// TODO only if changed .. and if plugin doesn't have defaults
DEBUG_TRACE (DEBUG::VST3Config, string_compose ("VST3PI::request_bus_layout: in = %1 aux-in = %2 out = %3\n", in, aux_in, out));
bool was_active = _is_processing;
@ -2317,37 +2334,53 @@ VST3PI::request_bus_layout (uint32_t in, uint32_t aux_in, uint32_t out)
VSTSpeakerArrangements sa_in;
VSTSpeakerArrangements sa_out;
/* This needs work for busses >= 64 channels.
* also bitset shifting only work until 1 << 18 (speaker layout 11.2.6)
* ~/src/ardour/libs/vst3/pluginterfaces/vst/vstspeaker.h
*/
Vst::SpeakerArrangement sa = ((uint64_t)1 << in) - 1;
if (in == 1 /*Vst::SpeakerArr::kSpeakerL */ && !_no_kMono) {
sa = Vst::SpeakerArr::kMono; /* 1 << 19 */
} else if (in > 63) {
sa = 0xffffffffffffffff;
}
if (_n_bus_in > 0) {
sa_in.push_back (sa);
while (sa_in.size () < (VSTSpeakerArrangements::size_type) _n_bus_in) {
size_t const bn = sa_in.size ();
int32_t const n_chn = _bus_channel_cnt_in[bn];
Vst::SpeakerArrangement s = sa;
DEBUG_TRACE (DEBUG::VST3Config, string_compose ("VST3PI::request_bus_layout bus-width = %1 ; in[%2] = %3%4 \n", n_chn, bn, std::hex, s));
sa_in.push_back (s);
if (n_chn > 0) {
sa = sa >> n_chn;
}
if (sa_in.size () == 1) {
/* add aux inputs */
sa |= ((uint64_t)1 << aux_in) - 1;
}
}
sa = ((uint64_t)1 << out) - 1;
if (out == 1 /*Vst::SpeakerArr::kSpeakerL */ && !_no_kMono) {
sa = Vst::SpeakerArr::kMono; /* 1 << 19 */
}
if (_n_bus_out > 0) {
sa_out.push_back (sa);
}
sa = ((uint64_t)1 << aux_in) - 1;
if (_n_bus_in > 1) {
sa_in.push_back (sa);
}
sa = 0;
while (sa_in.size () < (VSTSpeakerArrangements::size_type) _n_bus_in) {
sa_in.push_back (sa);
} else if (out > 63) {
sa = 0xffffffffffffffff;
}
while (sa_out.size () < (VSTSpeakerArrangements::size_type) _n_bus_out) {
sa_out.push_back (sa);
size_t const bn = sa_out.size ();
int32_t const n_chn = _bus_channel_cnt_out[bn];
Vst::SpeakerArrangement s = sa;
DEBUG_TRACE (DEBUG::VST3Config, string_compose ("VST3PI::request_bus_layout bus-width = %1 ; out[%2] = %3%4 \n", n_chn, bn, std::hex, s));
sa_out.push_back (s);
if (n_chn > 0) {
sa = sa >> n_chn;
}
}
Vst::SpeakerArrangement null_arrangement = {};