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#pragma once
#include <cstddef>
#include <cstdint>
#include <memory>
#include "chunk.hpp"
#include "ff.h"
#include "span.hpp"
#include "audio_element.hpp"
#include "codec.hpp"
namespace audio {
/*
* An audio element that accepts various kinds of encoded audio streams as
* input, and converts them to uncompressed PCM output.
*/
class AudioDecoder : public IAudioElement {
public:
AudioDecoder();
~AudioDecoder();
auto StackSizeBytes() const -> std::size_t override { return 10 * 1024; };
auto HasUnprocessedInput() -> bool override;
auto IsOverBuffered() -> bool override;
auto ProcessStreamInfo(const StreamInfo& info) -> void override;
auto ProcessChunk(const cpp::span<std::byte>& chunk) -> void override;
auto ProcessEndOfStream() -> void override;
auto Process() -> void override;
AudioDecoder(const AudioDecoder&) = delete;
AudioDecoder& operator=(const AudioDecoder&) = delete;
private:
memory::Arena arena_;
std::unique_ptr<codecs::ICodec> current_codec_;
std::optional<StreamInfo> stream_info_;
std::optional<ChunkReader> chunk_reader_;
bool has_sent_stream_info_;
bool has_samples_to_send_;
bool needs_more_input_;
};
} // namespace audio
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