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69 lines
1.8 KiB
69 lines
1.8 KiB
/*
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* Copyright 2023 jacqueline <me@jacqueline.id.au>
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*
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* SPDX-License-Identifier: GPL-3.0-only
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*/
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#pragma once
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#include <cstdint>
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#include <functional>
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#include <optional>
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#include "cbor.h"
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#include "result.hpp"
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#include "span.hpp"
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namespace audio {
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extern const int kEncoderFlags;
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extern const int kDecoderFlags;
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enum MessageType {
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TYPE_UNKNOWN,
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TYPE_CHUNK_HEADER,
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TYPE_STREAM_INFO,
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};
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template <typename Writer>
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auto WriteMessage(MessageType type, Writer&& writer, cpp::span<std::byte> data)
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-> cpp::result<size_t, CborError> {
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CborEncoder root;
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CborEncoder container;
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uint8_t* cast_data = reinterpret_cast<uint8_t*>(data.data());
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cbor_encoder_init(&root, cast_data, data.size(), kEncoderFlags);
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cbor_encoder_create_array(&root, &container, 2);
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cbor_encode_uint(&container, type);
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std::optional<CborError> inner_err = std::invoke(writer, container);
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if (inner_err) {
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return cpp::fail(inner_err.value());
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}
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cbor_encoder_close_container(&root, &container);
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return cbor_encoder_get_buffer_size(&root, cast_data);
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}
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template <typename Result, typename Reader>
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auto ReadMessage(Reader&& reader, cpp::span<std::byte> data)
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-> cpp::result<Result, CborError> {
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CborParser parser;
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CborValue root;
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CborValue container;
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cbor_parser_init(reinterpret_cast<uint8_t*>(data.data()), data.size(),
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kDecoderFlags, &parser, &root);
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cbor_value_enter_container(&root, &container);
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// Skip the type header
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cbor_value_advance_fixed(&container);
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return std::invoke(reader, container);
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}
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auto WriteTypeOnlyMessage(MessageType type, cpp::span<std::byte> data)
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-> cpp::result<size_t, CborError>;
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auto ReadMessageType(cpp::span<std::byte> msg) -> MessageType;
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auto GetAdditionalData(cpp::span<std::byte> msg) -> cpp::span<std::byte>;
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} // namespace audio
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