From d03495d5686b15c0ddd233a6bcdd6f0a421edba7 Mon Sep 17 00:00:00 2001
From: Jean Pierre Cimalando <jp-dev@inbox.ru>
Date: Sat, 3 Apr 2021 03:07:13 +0200
Subject: [PATCH] Handle message /cc/changed

---
 src/sfizz/Synth.cpp          |  2 ++
 src/sfizz/SynthMessaging.cpp | 12 ++++++++++++
 src/sfizz/SynthPrivate.h     |  1 +
 3 files changed, 15 insertions(+)

diff --git a/src/sfizz/Synth.cpp b/src/sfizz/Synth.cpp
index 8f51064a..2b713909 100644
--- a/src/sfizz/Synth.cpp
+++ b/src/sfizz/Synth.cpp
@@ -258,6 +258,7 @@ void Synth::Impl::clear()
     clearCCLabels();
     currentUsedCCs_.clear();
     changedCCsThisCycle_.clear();
+    changedCCsLastCycle_.clear();
     clearKeyLabels();
     keySlots_.clear();
     swLastSlots_.clear();
@@ -1025,6 +1026,7 @@ void Synth::renderBlock(AudioSpan<float> buffer) noexcept
             sfizz_blob_t blob { changedCCs.data(), static_cast<uint32_t>(changedCCs.byte_size()) };
             broadcaster.receive<'b'>(finalFrameNumber, "/cc/changed", &blob);
     }
+    impl.changedCCsLastCycle_ = impl.changedCCsThisCycle_;
     impl.changedCCsThisCycle_.clear();
     // Send the changed keyswitch
     if (impl.currentSwitchChanged_) {
diff --git a/src/sfizz/SynthMessaging.cpp b/src/sfizz/SynthMessaging.cpp
index 940bb2a9..e96f0040 100644
--- a/src/sfizz/SynthMessaging.cpp
+++ b/src/sfizz/SynthMessaging.cpp
@@ -134,6 +134,18 @@ void sfz::Synth::dispatchMessage(Client& client, int delay, const char* path, co
             client.receive<'s'>(delay, path, label ? label->c_str() : "");
         } break;
 
+        MATCH("/cc/changed", "") {
+            const BitArray<config::numCCs>& changedCCs = impl.changedCCsThisCycle_;
+            sfizz_blob_t blob { changedCCs.data(), static_cast<uint32_t>(changedCCs.byte_size()) };
+            client.receive<'b'>(delay, path, &blob);
+        } break;
+
+        MATCH("/cc/changed~", "") {
+            const BitArray<config::numCCs>& changedCCs = impl.changedCCsLastCycle_;
+            sfizz_blob_t blob { changedCCs.data(), static_cast<uint32_t>(changedCCs.byte_size()) };
+            client.receive<'b'>(delay, path, &blob);
+        } break;
+
         //----------------------------------------------------------------------
 
         MATCH("/mem/buffers", "") {
diff --git a/src/sfizz/SynthPrivate.h b/src/sfizz/SynthPrivate.h
index 0f698124..960fe9f2 100644
--- a/src/sfizz/SynthPrivate.h
+++ b/src/sfizz/SynthPrivate.h
@@ -315,6 +315,7 @@ struct Synth::Impl final: public Parser::Listener {
     std::array<float, config::numCCs> defaultCCValues_;
     BitArray<config::numCCs> currentUsedCCs_;
     BitArray<config::numCCs> changedCCsThisCycle_;
+    BitArray<config::numCCs> changedCCsLastCycle_;
 
     // Messaging
     sfizz_receive_t* broadcastReceiver = nullptr;