1 files changed, 44 insertions, 0 deletions
diff --git a/src/audio/include/fatfs_source.hpp b/src/audio/include/fatfs_source.hpp
new file mode 100644
index 00000000..e4187d60
--- /dev/null
+++ b/src/audio/include/fatfs_source.hpp
@@ -0,0 +1,44 @@
+/*
+ * Copyright 2023 jacqueline <me@jacqueline.id.au>
+ *
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
+#pragma once
+
+#include <cstddef>
+#include <cstdint>
+#include <memory>
+
+#include "codec.hpp"
+#include "ff.h"
+
+#include "audio_source.hpp"
+
+namespace audio {
+
+/*
+ * Handles coordination with a persistent background task to asynchronously
+ * read files from disk into a StreamBuffer.
+ */
+class FatfsSource : public codecs::IStream {
+ public:
+  FatfsSource(codecs::StreamType, std::unique_ptr<FIL> file);
+  ~FatfsSource();
+
+  auto Read(cpp::span<std::byte> dest) -> ssize_t override;
+
+  auto CanSeek() -> bool override;
+
+  auto SeekTo(int64_t destination, SeekFrom from) -> void override;
+
+  auto CurrentPosition() -> int64_t override;
+
+  FatfsSource(const FatfsSource&) = delete;
+  FatfsSource& operator=(const FatfsSource&) = delete;
+
+ private:
+  std::unique_ptr<FIL> file_;
+};
+
+}  // namespace audio
+\ No newline at end of file