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/*
* Copyright 2023 jacqueline <me@jacqueline.id.au>
*
* SPDX-License-Identifier: GPL-3.0-only
*/
#pragma once
#include <cstddef>
#include <cstdint>
#include <optional>
#include <string>
#include <utility>
#include "mad.h"
#include "span.hpp"
#include "codec.hpp"
namespace codecs {
class MadMp3Decoder : public ICodec {
public:
MadMp3Decoder();
~MadMp3Decoder();
/*
* Returns the output format for the next frame in the stream. MP3 streams
* may represent multiple distinct tracks, with different bitrates, and so we
* handle the stream only on a frame-by-frame basis.
*/
auto BeginStream(cpp::span<const std::byte>) -> Result<OutputFormat> override;
/*
* Writes samples for the current frame.
*/
auto ContinueStream(cpp::span<const std::byte> input,
cpp::span<std::byte> output)
-> Result<OutputInfo> override;
auto SeekStream(cpp::span<const std::byte> input, std::size_t target_sample)
-> Result<void> override;
private:
mad_stream stream_;
mad_frame frame_;
mad_synth synth_;
int current_sample_;
auto GetBytesUsed(std::size_t) -> std::size_t;
};
} // namespace codecs
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