From 53148852c03fc5a0a914cefda6f3850bd9aebdd0 Mon Sep 17 00:00:00 2001
From: falkTX <falktx@falktx.com>
Date: Sun, 20 Nov 2022 16:47:37 +0000
Subject: Implement custom State::fileTypes for MOD

Signed-off-by: falkTX <falktx@falktx.com>
---
 distrho/DistrhoPlugin.hpp              | 21 +++++++++++++++++++++
 distrho/src/DistrhoPluginInternal.hpp  |  9 +++++++++
 distrho/src/DistrhoPluginLV2export.cpp |  9 +++++++++
 3 files changed, 39 insertions(+)

diff --git a/distrho/DistrhoPlugin.hpp b/distrho/DistrhoPlugin.hpp
index 02d2cda7..79b65a8c 100644
--- a/distrho/DistrhoPlugin.hpp
+++ b/distrho/DistrhoPlugin.hpp
@@ -763,6 +763,27 @@ struct State {
     */
     String description;
 
+   #ifdef __MOD_DEVICES__
+   /**
+      The file types that a filename path state supports, written as a comma-separated string without whitespace.
+      Currently supported file types are:
+         - audioloop: Audio Loops, meant to be used for looper-style plugins
+         - audiorecording: Audio Recordings, triggered by plugins and stored in the unit
+         - audiosample: One-shot Audio Samples, meant to be used for sampler-style plugins
+         - audiotrack: Audio Tracks, meant to be used as full-performance/song or backtrack
+         - cabsim: Speaker Cabinets, meant as small IR audio files
+         - h2drumkit: Hydrogen Drumkits, must use h2drumkit file extension
+         - ir: Impulse Responses
+         - midiclip: MIDI Clips, to be used in sync with host tempo, must have mid or midi file extension
+         - midisong: MIDI Songs, meant to be used as full-performance/song or backtrack
+         - sf2: SF2 Instruments, must have sf2 or sf3 file extension
+         - sfz: SFZ Instruments, must have sfz file extension
+
+      @note This is a custom extension only valid in builds MOD Audio.
+    */
+    String fileTypes;
+   #endif
+
    /**
       Default constructor for a null state.
     */
diff --git a/distrho/src/DistrhoPluginInternal.hpp b/distrho/src/DistrhoPluginInternal.hpp
index 30b31355..413654d7 100644
--- a/distrho/src/DistrhoPluginInternal.hpp
+++ b/distrho/src/DistrhoPluginInternal.hpp
@@ -859,6 +859,15 @@ public:
         return fData->states[index].description;
     }
 
+   #ifdef __MOD_DEVICES__
+    const String& getStateFileTypes(const uint32_t index) const noexcept
+    {
+        DISTRHO_SAFE_ASSERT_RETURN(fData != nullptr && index < fData->stateCount, sFallbackString);
+
+        return fData->states[index].fileTypes;
+    }
+   #endif
+
 # if DISTRHO_PLUGIN_WANT_FULL_STATE
     String getStateValue(const char* const key) const
     {
diff --git a/distrho/src/DistrhoPluginLV2export.cpp b/distrho/src/DistrhoPluginLV2export.cpp
index 24d9e229..8b93e7c7 100644
--- a/distrho/src/DistrhoPluginLV2export.cpp
+++ b/distrho/src/DistrhoPluginLV2export.cpp
@@ -393,9 +393,18 @@ void lv2_generate_ttl(const char* const basename)
             }
 
             if ((hints & kStateIsFilenamePath) == kStateIsFilenamePath)
+            {
+               #ifdef __MOD_DEVICES__
+                const String& fileTypes(plugin.getStateFileTypes(i));
+                if (fileTypes.isNotEmpty())
+                    pluginString += "    mod:fileTypes \"" + fileTypes + "\" ; \n";
+               #endif
                 pluginString += "    rdfs:range atom:Path .\n\n";
+            }
             else
+            {
                 pluginString += "    rdfs:range atom:String .\n\n";
+            }
 
             hasHostVisibleState = true;
         }
-- 
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