Add a bufferpool to the resources

src/sfizz/BufferPool.h

@@ -0,0 +1,46 @@
+// SPDX-License-Identifier: BSD-2-Clause
+
+// This code is part of the sfizz library and is licensed under a BSD 2-clause
+// license. You should have receive a LICENSE.md file along with the code.
+// If not, contact the sfizz maintainers at https://github.com/sfztools/sfizz
+
+#pragma once
+#include "Config.h"
+#include "Buffer.h"
+#include <array>
+#include <memory>
+
+namespace sfz
+{
+
+class BufferPool
+{
+public:
+    BufferPool()
+    {
+
+    }
+    void setBufferSize(unsigned bufferSize)
+    {
+        for (auto& buffer: buffers) {
+            // Trying to resize a buffer in use
+            ASSERT(buffer.use_count() != 1);
+            buffer->resize(bufferSize);
+        }
+    }
+
+    std::shared_ptr<sfz::Buffer<float>> getBuffer()
+    {
+        auto bufferIt = buffers.begin();
+        while (bufferIt < buffers.end()) {
+            if (bufferIt->use_count() == 1)
+                return *bufferIt;
+        }
+
+        // No buffer found; debug message
+        DBG("[sfizz] No free buffer available!");
+    }
+private:
+    std::array<std::shared_ptr<sfz::Buffer<float>>, config::bufferPoolSize> buffers;
+};
+}

src/sfizz/Config.h

@@ -28,6 +28,7 @@ namespace config {
     constexpr float defaultSampleRate { 48000 };
     constexpr int defaultSamplesPerBlock { 1024 };
     constexpr int maxBlockSize { 8192 };
+    constexpr int bufferPoolSize { 16 };
     constexpr int preloadSize { 8192 };
     constexpr int loggerQueueSize { 256 };
     constexpr int voiceLoggerQueueSize { 256 };

src/sfizz/Resources.h

@@ -6,6 +6,7 @@
 
 #pragma once
 #include "FilePool.h"
+#include "BufferPool.h"
 #include "FilterPool.h"
 #include "EQPool.h"
 #include "Logger.h"
@@ -17,6 +18,7 @@ class WavetableMulti;
 
 struct Resources
 {
+    BufferPool bufferPool;
     MidiState midiState;
     Logger logger;
     FilePool filePool { logger };