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Add a more distinct wrapper around chunk data

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This commit is contained in:
Robbert van der Helm
2020-12-07 02:41:37 +01:00
parent 7f7da50282
commit 84d00b568b
4 changed files with 47 additions and 37 deletions
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src/common/communication.h
+27 -25
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@@ -931,8 +931,8 @@ EventResult passthrough_event(AEffect* plugin, F callback, Event& event) {
[&](const std::string& s) -> void* {
return const_cast<char*>(s.c_str());
},
[&](const std::vector<uint8_t>& buffer) -> void* {
return const_cast<uint8_t*>(buffer.data());
[&](const ChunkData& chunk) -> void* {
return const_cast<uint8_t*>(chunk.buffer.data());
},
[&](native_size_t& window_handle) -> void* {
// This is the X11 window handle that the editor should reparent
@@ -982,32 +982,26 @@ EventResult passthrough_event(AEffect* plugin, F callback, Event& event) {
auto write_payload_fn = overload{
[&](auto) -> EventResultPayload { return nullptr; },
[&](const AEffect& updated_plugin) -> EventResultPayload {
// This is a bit of a special case! Instead of writing some
// return value, we will update values on the native VST
// plugin's `AEffect` object. This is triggered by the
// `audioMasterIOChanged` callback from the hosted VST plugin.
// This is a bit of a special case! Instead of writing some return
// value, we will update values on the native VST plugin's `AEffect`
// object. This is triggered by the `audioMasterIOChanged` callback
// from the hosted VST plugin.
update_aeffect(*plugin, updated_plugin);
return nullptr;
},
[&](DynamicSpeakerArrangement& speaker_arrangement)
-> EventResultPayload { return speaker_arrangement; },
[&](WantsChunkBuffer&) -> EventResultPayload {
// In this case the plugin will have written its data stored in
// an array to which a pointer is stored in `data`, with the
// return value from the event determines how much data the
// plugin has written
const uint8_t* chunk_data = *static_cast<uint8_t**>(data);
return std::vector<uint8_t>(chunk_data, chunk_data + return_value);
},
[&](VstIOProperties& props) -> EventResultPayload { return props; },
[&](VstMidiKeyName& key_name) -> EventResultPayload {
return key_name;
},
[&](VstParameterProperties& props) -> EventResultPayload {
return props;
},
[&](WantsAEffectUpdate&) -> EventResultPayload { return *plugin; },
[&](WantsChunkBuffer&) -> EventResultPayload {
// In this case the plugin will have written its data stored in an
// array to which a pointer is stored in `data`, with the return
// value from the event determines how much data the plugin has
// written
const uint8_t* chunk_data = *static_cast<uint8_t**>(data);
return ChunkData{
std::vector<uint8_t>(chunk_data, chunk_data + return_value)};
},
[&](WantsVstRect&) -> EventResultPayload {
// The plugin should have written a pointer to a VstRect struct into
// the data pointer. I haven't seen this fail yet, but since some
@@ -1021,10 +1015,11 @@ EventResult passthrough_event(AEffect* plugin, F callback, Event& event) {
return *editor_rect;
},
[&](WantsVstTimeInfo&) -> EventResultPayload {
// Not sure why the VST API has twenty different ways of returning
// structs, but in this case the value returned from the callback
// function is actually a pointer to a `VstTimeInfo` struct! It can
// also be a null pointer if the host doesn't support this.
// Not sure why the VST API has twenty different ways of
// returning structs, but in this case the value returned from
// the callback function is actually a pointer to a
// `VstTimeInfo` struct! It can also be a null pointer if the
// host doesn't support this.
const auto time_info =
reinterpret_cast<const VstTimeInfo*>(return_value);
if (!time_info) {
@@ -1035,6 +1030,13 @@ EventResult passthrough_event(AEffect* plugin, F callback, Event& event) {
},
[&](WantsString&) -> EventResultPayload {
return std::string(static_cast<char*>(data));
},
[&](VstIOProperties& props) -> EventResultPayload { return props; },
[&](VstMidiKeyName& key_name) -> EventResultPayload {
return key_name;
},
[&](VstParameterProperties& props) -> EventResultPayload {
return props;
}};
// As mentioned about, the `effSetSpeakerArrangement` and