From da5be4446fafd0529458b865787c8ef035341f07 Mon Sep 17 00:00:00 2001
From: falkTX <falktx@falktx.com>
Date: Fri, 8 Aug 2025 18:00:47 +0200
Subject: [PATCH] Implemement MIDI output for RtAudio native audio fallback

Signed-off-by: falkTX <falktx@falktx.com>
---
 distrho/src/jackbridge/JackBridge.cpp    |  2 +-
 distrho/src/jackbridge/RtAudioBridge.hpp | 24 +++++++++++++++++++++++-
 distrho/src/jackbridge/WebBridge.hpp     |  2 +-
 3 files changed, 25 insertions(+), 3 deletions(-)

diff --git a/distrho/src/jackbridge/JackBridge.cpp b/distrho/src/jackbridge/JackBridge.cpp
index ba5ecb18..5638848b 100644
--- a/distrho/src/jackbridge/JackBridge.cpp
+++ b/distrho/src/jackbridge/JackBridge.cpp
@@ -951,7 +951,7 @@ jack_client_t* jackbridge_client_open(const char* client_name, uint32_t options,
         return kValidClient;
     delete nativeBridge;
    #endif
-    
+
    #if defined(HAVE_RTAUDIO) && defined(RTAUDIO_API_TYPE)
     nativeBridge = new RtAudioBridge;
     if (nativeBridge->open(client_name))
diff --git a/distrho/src/jackbridge/RtAudioBridge.hpp b/distrho/src/jackbridge/RtAudioBridge.hpp
index 6f93d06a..9995ddfe 100644
--- a/distrho/src/jackbridge/RtAudioBridge.hpp
+++ b/distrho/src/jackbridge/RtAudioBridge.hpp
@@ -33,7 +33,7 @@
 # define RTAUDIO_API_TYPE WINDOWS_WASAPI
 # define RTMIDI_API_TYPE WINDOWS_MM
 #else
-# if defined(HAVE_PULSEAUDIO)
+# if defined(HAVE_PULSEAUDIO) && !defined(DPF_JACK_STANDALONE_SKIP_PULSEAUDIO_FALLBACK)
 #  define __LINUX_PULSE__
 #  define RTAUDIO_API_TYPE LINUX_PULSE
 # elif defined(HAVE_ALSA)
@@ -392,6 +392,28 @@ struct RtAudioBridge : NativeBridge {
         const ScopedDenormalDisable sdd;
         self->jackProcessCallback(numFrames, self->jackProcessArg);
 
+       #if DISTRHO_PLUGIN_WANT_MIDI_OUTPUT
+        if (self->midiOutBuffer.isDataAvailableForReading())
+        {
+            static_assert(kMaxMIDIInputMessageSize + 1u == 4, "change code if bumping this value");
+            uint8_t data[4] = {};
+
+            while (self->midiOutBuffer.isDataAvailableForReading() &&
+                    self->midiOutBuffer.readCustomData(data, ARRAY_SIZE(data)))
+            {
+                // offset not used in RtMidiOut
+                self->midiOutBuffer.readUInt();
+
+                for (std::vector<RtMidiOut>::iterator it = self->midiOuts.begin(), end = self->midiOuts.end(); it != end; ++it)
+                {
+                    static_cast<RtMidiOut&>(*it).sendMessage(data + 1, data[0]);
+                }
+            }
+
+            self->midiOutBuffer.flush();
+        }
+       #endif
+
         return 0;
     }
 
diff --git a/distrho/src/jackbridge/WebBridge.hpp b/distrho/src/jackbridge/WebBridge.hpp
index afb2c4bf..94793f74 100644
--- a/distrho/src/jackbridge/WebBridge.hpp
+++ b/distrho/src/jackbridge/WebBridge.hpp
@@ -494,7 +494,7 @@ struct WebBridge : NativeBridge {
                     }, offset, bytes[0], bytes[1], bytes[2], bytes[3], timestamp);
                 }
 
-                self->midiOutBuffer.clearData();
+                self->midiOutBuffer.flush();
             }
            #endif
         }