Implement IStreamAttributes when reading from host

This allows presets to contain meta data about file names and the type
of preset.

Even though the docs don't mention that this is also relevant for
`getState()`, we should also implement it there so plugins can write
their own meta data.

src/common/logging/vst3.cpp

@@ -22,6 +22,25 @@
 
 #include "src/common/serialization/vst3.h"
 
+/**
+ * Format a `YaBStream` object as a string so we don't have to repeat this
+ * everywhere.
+ */
+std::string format_bstream(const YaBStream& stream) {
+    std::ostringstream formatted;
+    formatted << "<IBStream* ";
+    if (stream.supports_stream_attributes) {
+        formatted << "with meta data ";
+    }
+    if (stream.file_name) {
+        formatted << "for \"" << VST3::StringConvert::convert(*stream.file_name)
+                  << "\" ";
+    }
+    formatted << "containing " << stream.size() << " bytes>";
+
+    return formatted.str();
+}
+
 Vst3Logger::Vst3Logger(Logger& generic_logger) : logger(generic_logger) {}
 
 void Vst3Logger::log_query_interface(
@@ -87,8 +106,7 @@ bool Vst3Logger::log_request(bool is_host_vst,
     return log_request_base(is_host_vst, [&](auto& message) {
         message << request.instance_id
                 << ": {IComponent,IEditController}::setState(state = "
-                   "<IBStream* containing "
-                << request.state.size() << "bytes>)";
+                << format_bstream(request.state) << ")";
     });
 }
 
@@ -180,9 +198,8 @@ bool Vst3Logger::log_request(
     const YaEditController::SetComponentState& request) {
     return log_request_base(is_host_vst, [&](auto& message) {
         message << request.instance_id
-                << ": IEditController::setComponentState(state = <IBStream* "
-                   "containing "
-                << request.state.size() << " bytes>)";
+                << ": IEditController::setComponentState(state = "
+                << format_bstream(request.state) << ")";
     });
 }
 
@@ -611,8 +628,7 @@ bool Vst3Logger::log_request(bool is_host_vst,
         message << "IProgramListData::setProgramData(listId = "
                 << request.list_id
                 << ", programIndex = " << request.program_index
-                << ", data = <IBStream* containing " << request.data.size()
-                << "bytes>)";
+                << ", data = " << format_bstream(request.data) << ")";
     });
 }
 
@@ -635,8 +651,7 @@ bool Vst3Logger::log_request(bool is_host_vst,
                              const YaUnitData::SetUnitData& request) {
     return log_request_base(is_host_vst, [&](auto& message) {
         message << "IUnitData::setUnitData(listId = " << request.unit_id
-                << ", data = <IBStream* containing " << request.data.size()
-                << "bytes>)";
+                << ", data = " << format_bstream(request.data) << ")";
     });
 }
 
@@ -747,8 +762,7 @@ bool Vst3Logger::log_request(bool is_host_vst,
                 << ": IUnitInfo::setUnitProgramData(listOrUnitId = "
                 << request.list_or_unit_id
                 << ", programIndex = " << request.program_index
-                << ", data = <IBStream* containing " << request.data.size()
-                << "bytes>)";
+                << ", data = " << format_bstream(request.data) << ")";
     });
 }
 
@@ -1199,8 +1213,7 @@ void Vst3Logger::log_response(
     log_response_base(is_host_vst, [&](auto& message) {
         message << response.result.string();
         if (response.result == Steinberg::kResultOk) {
-            message << ", <IBStream* containing "
-                    << response.updated_state.size() << " bytes>";
+            message << ", " << format_bstream(response.updated_state);
         }
     });
 }
@@ -1372,8 +1385,7 @@ void Vst3Logger::log_response(
     log_response_base(is_host_vst, [&](auto& message) {
         message << response.result.string();
         if (response.result == Steinberg::kResultOk) {
-            message << ", <IBStream* containing " << response.data.size()
-                    << " bytes>";
+            message << ", " << format_bstream(response.data);
         }
     });
 }
@@ -1383,8 +1395,7 @@ void Vst3Logger::log_response(bool is_host_vst,
     log_response_base(is_host_vst, [&](auto& message) {
         message << response.result.string();
         if (response.result == Steinberg::kResultOk) {
-            message << ", <IBStream* containing " << response.data.size()
-                    << " bytes>";
+            message << ", " << format_bstream(response.data);
         }
     });
 }
@@ -1469,8 +1480,7 @@ void Vst3Logger::log_response(
     log_response_base(is_host_vst, [&](auto& message) {
         message << response.result.string();
         if (response.result == Steinberg::kResultOk) {
-            message << ", <IBStream* containing " << response.stream.size()
-                    << " bytes>";
+            message << ", " << format_bstream(response.stream);
         }
     });
 }