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#pragma once
#include <cstdint>
#include <memory>
#include <string>
#include "chunk.hpp"
#include "freertos/FreeRTOS.h"
#include "freertos/message_buffer.h"
#include "freertos/queue.h"
#include "span.hpp"
#include "audio_element.hpp"
#include "storage.hpp"
#include "stream_buffer.hpp"
namespace audio {
class FatfsAudioInput : public IAudioElement {
public:
explicit FatfsAudioInput(std::shared_ptr<drivers::SdStorage> storage);
~FatfsAudioInput();
auto ProcessStreamInfo(const StreamInfo& info)
-> cpp::result<void, AudioProcessingError> override;
auto ProcessChunk(const cpp::span<std::byte>& chunk)
-> cpp::result<std::size_t, AudioProcessingError> override;
auto ProcessIdle() -> cpp::result<void, AudioProcessingError> override;
auto SendChunk(cpp::span<std::byte> dest) -> size_t;
FatfsAudioInput(const FatfsAudioInput&) = delete;
FatfsAudioInput& operator=(const FatfsAudioInput&) = delete;
private:
auto GetRingBufferDistance() const -> size_t;
std::shared_ptr<drivers::SdStorage> storage_;
std::byte* raw_file_buffer_;
cpp::span<std::byte> file_buffer_;
cpp::span<std::byte>::iterator file_buffer_read_pos_;
cpp::span<std::byte>::iterator pending_read_pos_;
cpp::span<std::byte>::iterator file_buffer_write_pos_;
FIL current_file_;
bool is_file_open_;
};
} // namespace audio
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