1 files changed, 56 insertions, 0 deletions
diff --git a/source/common.hpp b/source/common.hpp
new file mode 100644
index 0000000..1045b32
--- /dev/null
+++ b/source/common.hpp
@@ -0,0 +1,56 @@
+#include <array>
+#include <cstdint>
+
+constexpr unsigned int MAX_SAMPLE_BUFFER_SIZE = 6000;
+
+using Sample = uint16_t;
+
+class SampleBuffer
+{
+public:
+    void clear() {
+        m_buffer.fill(0);
+    }
+    void modify(Sample *data, unsigned int srcsize) {
+        auto size = srcsize < m_size ? srcsize : m_size;
+        std::copy(data, data + size, m_buffer.data());
+        m_modified = m_buffer.data();
+    }
+    void midmodify(Sample *data, unsigned int srcsize) {
+        auto size = srcsize < m_size / 2 ? srcsize : m_size / 2;
+        std::copy(data, data + size, middata());
+        m_modified = middata();
+    }
+
+    void setSize(unsigned int size) {
+        m_size = size < MAX_SAMPLE_BUFFER_SIZE ? size : MAX_SAMPLE_BUFFER_SIZE;
+    }
+
+    Sample *data() /*const*/ {
+        return m_buffer.data();
+    }
+    Sample *middata() /*const*/ {
+        return m_buffer.data() + m_size / 2;
+    }
+    uint8_t *bytedata() /*const*/ {
+        return reinterpret_cast<uint8_t *>(m_buffer.data());
+    }
+
+    Sample *modified() {
+        auto m = m_modified;
+        m_modified = nullptr;
+        return m;
+    }
+    unsigned int size() const {
+        return m_size;
+    }
+    unsigned int bytesize() const {
+        return m_size * sizeof(Sample);
+    }
+
+private:
+    std::array<Sample, MAX_SAMPLE_BUFFER_SIZE> m_buffer;
+    unsigned int m_size = MAX_SAMPLE_BUFFER_SIZE;
+    Sample *m_modified = nullptr;
+};
+