Add cbor wrapper, and chunk streaming util

1 files changed, 44 insertions, 0 deletions

diff --git a/src/audio/include/stream_info.hpp b/src/audio/include/stream_info.hpp
new file mode 100644
index 00000000..2b1429ea
--- /dev/null
+++ b/src/audio/include/stream_info.hpp
@@ -0,0 +1,44 @@
+#pragma once
+
+#include <cstdint>
+#include <optional>
+#include <string>
+#include "esp-idf/components/cbor/tinycbor/src/cbor.h"
+#include "result.hpp"
+
+namespace audio {
+
+class StreamInfo {
+  public:
+    enum ParseError {
+      WRONG_TYPE,
+      MISSING_MAP,
+    };
+
+    static auto Create(const uint8_t *buffer, size_t length) -> cpp::result<StreamInfo, ParseError>;
+    StreamInfo(CborValue& map);
+
+    StreamInfo() = default;
+    StreamInfo(const StreamInfo&) = default;
+
+    ~StreamInfo() = default;
+
+    auto Path() const -> const std::optional<std::string>& { return path_; }
+    auto Channels() const -> const std::optional<uint8_t>& { return channels_; }
+    auto BitsPerSample() const -> const std::optional<uint8_t>& { return bits_per_sample_; }
+    auto SampleRate() const -> const std::optional<uint16_t>& { return sample_rate_; }
+
+    enum EncodeError {
+      OUT_OF_MEMORY,
+    };
+
+    auto WriteToStream(CborEncoder encoder) -> cpp::result<void, EncodeError>;
+  private:
+
+    std::optional<std::string> path_;
+    std::optional<uint8_t> channels_;
+    std::optional<uint8_t> bits_per_sample_;
+    std::optional<uint16_t> sample_rate_;
+};
+
+} // namespace audio