ardour/livetrax
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VST3: assume left-only is Mono (#9229)

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VST3 speaker arrangements (ie port is connected) can distinguish
between left only pin (of stereo pair) and Mono.
This commit is contained in:
Robin Gareus 2023-02-08 22:53:26 +01:00
parent 4429697799
commit 445e5162fd
Signed by: rgareus
GPG Key ID: A090BCE02CF57F04
1 changed files with 17 additions and 6 deletions
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23
libs/ardour/vst3_plugin.cc
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@ -2064,10 +2064,12 @@ VST3PI::enable_io (std::vector<bool> const& ins, std::vector<bool> const& outs)
return;
}
bool was_active = false;
if (_is_processing) {
was_active = true;
deactivate ();
/* some plugins, notably JUCE based ones, require the plugin to be
* inactive to change bus arrangements.
*/
bool was_active = _is_processing;
if (!deactivate ()) {
DEBUG_TRACE (DEBUG::VST3Config, "VST3PI::enable_io failed to deactivate plugin\n");
}
DEBUG_TRACE (DEBUG::VST3Config, string_compose ("VST3PI::enable_io: ins = %1 == %3 outs = %2 == %4\n", ins.size (), outs.size (), n_audio_inputs (), n_audio_outputs ()));
@ -2098,6 +2100,10 @@ VST3PI::enable_io (std::vector<bool> const& ins, std::vector<bool> const& outs)
enable = true;
}
}
/* special case for Left only == Mono */
if (sa == 1 /*Vst::SpeakerArr::kSpeakerL */) {
sa = Vst::SpeakerArr::kMono; /* 1 << 19 */
}
DEBUG_TRACE (DEBUG::VST3Config, string_compose ("VST3PI::enable_io: activateBus (kAudio, kInput, %1, %2, %3%4)\n", sa_in.size (), enable, std::hex, sa));
_component->activateBus (Vst::kAudio, Vst::kInput, sa_in.size (), enable);
@ -2114,16 +2120,21 @@ VST3PI::enable_io (std::vector<bool> const& ins, std::vector<bool> const& outs)
enable = true;
}
}
/* special case for Left only == Mono */
if (sa == 1 /*Vst::SpeakerArr::kSpeakerL */) {
sa = Vst::SpeakerArr::kMono; /* 1 << 19 */
}
DEBUG_TRACE (DEBUG::VST3Config, string_compose ("VST3PI::enable_io: activateBus (kAudio, kOutput, %1, %2, %3%4)\n", sa_out.size (), enable, std::hex, sa));
_component->activateBus (Vst::kAudio, Vst::kOutput, sa_out.size (), enable);
sa_out.push_back (sa);
}
Vst::SpeakerArrangement null_arrangement = {};
#ifndef NDEBUG
tresult rv =
#endif
_processor->setBusArrangements (sa_in.size () > 0 ? &sa_in[0] : NULL, sa_in.size (),
sa_out.size () > 0 ? &sa_out[0] : NULL, sa_out.size ());
_processor->setBusArrangements (sa_in.size () > 0 ? &sa_in[0] : &null_arrangement, sa_in.size (),
sa_out.size () > 0 ? &sa_out[0] : &null_arrangement, sa_out.size ());
#ifndef NDEBUG
DEBUG_TRACE (DEBUG::VST3Config, string_compose ("VST3PI::enable_io: setBusArrangements ins = %1 outs = %2 | rv = %3\n", sa_in.size (), sa_out.size (), rv));