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