From dcfbc34ba1df9055c47026885d00d66fd0b662dd Mon Sep 17 00:00:00 2001
From: Robbert van der Helm <mail@robbertvanderhelm.nl>
Date: Mon, 4 Jan 2021 22:17:19 +0100
Subject: [PATCH] Add stubs for IAudioPresentationLatency

---
 src/common/serialization/vst3/plugin-proxy.cpp | 10 +++++++++-
 src/common/serialization/vst3/plugin-proxy.h   |  7 ++++++-
 src/plugin/bridges/vst3-impls/plugin-proxy.cpp | 11 +++++++++++
 src/plugin/bridges/vst3-impls/plugin-proxy.h   |  6 ++++++
 4 files changed, 32 insertions(+), 2 deletions(-)

diff --git a/src/common/serialization/vst3/plugin-proxy.cpp b/src/common/serialization/vst3/plugin-proxy.cpp
index 934d7968..ffe6e7d0 100644
--- a/src/common/serialization/vst3/plugin-proxy.cpp
+++ b/src/common/serialization/vst3/plugin-proxy.cpp
@@ -22,6 +22,7 @@ Vst3PluginProxy::ConstructArgs::ConstructArgs(
     Steinberg::IPtr<Steinberg::FUnknown> object,
     size_t instance_id)
     : instance_id(instance_id),
+      audio_presentation_latency_args(object),
       audio_processor_args(object),
       component_args(object),
       connection_point_args(object),
@@ -35,7 +36,9 @@ Vst3PluginProxy::ConstructArgs::ConstructArgs(
       unit_info_args(object) {}
 
 Vst3PluginProxy::Vst3PluginProxy(const ConstructArgs&& args)
-    : YaAudioProcessor(std::move(args.audio_processor_args)),
+    : YaAudioPresentationLatency(
+          std::move(args.audio_presentation_latency_args)),
+      YaAudioProcessor(std::move(args.audio_processor_args)),
       YaComponent(std::move(args.component_args)),
       YaConnectionPoint(std::move(args.connection_point_args)),
       YaEditController(std::move(args.edit_controller_args)),
@@ -78,6 +81,11 @@ tresult PLUGIN_API Vst3PluginProxy::queryInterface(Steinberg::FIDString _iid,
             return ::Steinberg ::kResultOk;
         }
     }
+    if (YaAudioPresentationLatency::supported()) {
+        QUERY_INTERFACE(_iid, obj,
+                        Steinberg::Vst::IAudioPresentationLatency::iid,
+                        Steinberg::Vst::IAudioPresentationLatency)
+    }
     if (YaAudioProcessor::supported()) {
         QUERY_INTERFACE(_iid, obj, Steinberg::Vst::IAudioProcessor::iid,
                         Steinberg::Vst::IAudioProcessor)
diff --git a/src/common/serialization/vst3/plugin-proxy.h b/src/common/serialization/vst3/plugin-proxy.h
index 427eb91e..a25d8bf1 100644
--- a/src/common/serialization/vst3/plugin-proxy.h
+++ b/src/common/serialization/vst3/plugin-proxy.h
@@ -19,6 +19,7 @@
 #include <bitsery/ext/std_variant.h>
 
 #include "../common.h"
+#include "plugin/audio-presentation-latency.h"
 #include "plugin/audio-processor.h"
 #include "plugin/component.h"
 #include "plugin/connection-point.h"
@@ -57,7 +58,8 @@
  * implements any interface such an object might also implement, we can allow
  * perfect proxying behaviour for connecting components.
  */
-class Vst3PluginProxy : public YaAudioProcessor,
+class Vst3PluginProxy : public YaAudioPresentationLatency,
+                        public YaAudioProcessor,
                         public YaComponent,
                         public YaConnectionPoint,
                         public YaEditController,
@@ -86,6 +88,8 @@ class Vst3PluginProxy : public YaAudioProcessor,
          */
         native_size_t instance_id;
 
+        YaAudioPresentationLatency::ConstructArgs
+            audio_presentation_latency_args;
         YaAudioProcessor::ConstructArgs audio_processor_args;
         YaComponent::ConstructArgs component_args;
         YaConnectionPoint::ConstructArgs connection_point_args;
@@ -102,6 +106,7 @@ class Vst3PluginProxy : public YaAudioProcessor,
         template <typename S>
         void serialize(S& s) {
             s.value8b(instance_id);
+            s.object(audio_presentation_latency_args);
             s.object(audio_processor_args);
             s.object(component_args);
             s.object(connection_point_args);
diff --git a/src/plugin/bridges/vst3-impls/plugin-proxy.cpp b/src/plugin/bridges/vst3-impls/plugin-proxy.cpp
index a8937309..4da62329 100644
--- a/src/plugin/bridges/vst3-impls/plugin-proxy.cpp
+++ b/src/plugin/bridges/vst3-impls/plugin-proxy.cpp
@@ -39,6 +39,17 @@ Vst3PluginProxyImpl::queryInterface(const Steinberg::TUID _iid, void** obj) {
     return result;
 }
 
+tresult PLUGIN_API Vst3PluginProxyImpl::setAudioPresentationLatencySamples(
+    Steinberg::Vst::BusDirection dir,
+    int32 busIndex,
+    uint32 latencyInSamples) {
+    // TODO: Implement
+    bridge.logger.log(
+        "TODO: "
+        "IAudioPresentationLatency::setAudioPresentationLatencySamples()");
+    return Steinberg::kNotImplemented;
+}
+
 tresult PLUGIN_API Vst3PluginProxyImpl::setBusArrangements(
     Steinberg::Vst::SpeakerArrangement* inputs,
     int32 numIns,
diff --git a/src/plugin/bridges/vst3-impls/plugin-proxy.h b/src/plugin/bridges/vst3-impls/plugin-proxy.h
index e8465fff..4ff42cc7 100644
--- a/src/plugin/bridges/vst3-impls/plugin-proxy.h
+++ b/src/plugin/bridges/vst3-impls/plugin-proxy.h
@@ -38,6 +38,12 @@ class Vst3PluginProxyImpl : public Vst3PluginProxy {
     tresult PLUGIN_API queryInterface(const Steinberg::TUID _iid,
                                       void** obj) override;
 
+    // From `IAudioPresentationLatency`
+    tresult PLUGIN_API
+    setAudioPresentationLatencySamples(Steinberg::Vst::BusDirection dir,
+                                       int32 busIndex,
+                                       uint32 latencyInSamples) override;
+
     // From `IAudioProcessor`
     tresult PLUGIN_API
     setBusArrangements(Steinberg::Vst::SpeakerArrangement* inputs,