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Handle AEffect object updates

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This commit is contained in:
Robbert van der Helm
2020-03-11 16:33:44 +01:00
parent ea8feb07a9
commit 8464706336
5 changed files with 48 additions and 15 deletions
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src/wine-host/plugin-bridge.cpp
+14 -8
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@@ -109,10 +109,8 @@ PluginBridge::PluginBridge(std::string plugin_dll_path,
"' failed to initialize.");
}
// Send the plugin's information to the Linux VST plugin
// TODO: This is now done only once at startup, do plugins update their
// parameters? In that case we should be detecting updates and pass
// them along accordingly.
// Send the plugin's information to the Linux VST plugin. Any updates during
// runtime are handled using the `audioMasterIOChanged` host callback.
write_object(vst_host_aeffect, *plugin);
// We only needed this little hack during initialization
@@ -195,7 +193,8 @@ void PluginBridge::wait() {
class HostCallbackDataConverter : DefaultDataConverter {
public:
HostCallbackDataConverter(VstTimeInfo& time_info) : time(time_info) {}
HostCallbackDataConverter(AEffect* plugin, VstTimeInfo& time_info)
: plugin(plugin), time_info(time_info) {}
std::optional<EventPayload> read(const int opcode,
const intptr_t value,
@@ -219,6 +218,12 @@ class HostCallbackDataConverter : DefaultDataConverter {
case audioMasterGetTime:
return WantsVstTimeInfo{};
break;
case audioMasterIOChanged:
// This is a helpful event that indicates that the VST plugin's
// `AEffect` struct has changed. Writing these results back is
// done inside of `passthrough_event`.
return AEffect(*plugin);
break;
default:
return DefaultDataConverter::read(opcode, value, data);
break;
@@ -230,7 +235,7 @@ class HostCallbackDataConverter : DefaultDataConverter {
case audioMasterGetTime:
// Write the returned `VstTimeInfo` struct into a field and make
// the function return a poitner to it in the function below
time = std::get<VstTimeInfo>(response.payload);
time_info = std::get<VstTimeInfo>(response.payload);
break;
default:
DefaultDataConverter::write(opcode, data, response);
@@ -252,7 +257,8 @@ class HostCallbackDataConverter : DefaultDataConverter {
}
private:
VstTimeInfo& time;
AEffect* plugin;
VstTimeInfo& time_info;
};
intptr_t PluginBridge::host_callback(AEffect* /*plugin*/,
@@ -261,7 +267,7 @@ intptr_t PluginBridge::host_callback(AEffect* /*plugin*/,
intptr_t value,
void* data,
float option) {
HostCallbackDataConverter converter(time_info);
HostCallbackDataConverter converter(plugin, time_info);
return send_event(vst_host_callback, converter, opcode, index, value, data,
option, std::nullopt);
}