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#pragma once
#include <stdint.h>
#include <cstddef>
#include <cstdint>
#include "result.hpp"
namespace codecs {
enum CreateCodecError { UNKNOWN_EXTENSION };
auto CreateCodecForFile(const std::string& extension)
-> cpp::result<std::unique_ptr<ICodec>, CreateCodecError>;
class ICodec {
public:
virtual ~ICodec() {}
virtual auto CanHandleFile(const std::string& path) -> bool = 0;
struct OutputFormat {
uint8_t num_channels;
uint8_t bits_per_sample;
int sample_rate_hz;
};
virtual auto GetOutputFormat() -> OutputFormat = 0;
enum ProcessingError {};
struct Result {
bool need_more_input;
/*
* For need_more_input, this is how far we got in the input buffer
* before we were unable to process more data. Any remaining data in the
* buffer should be moved to the start before the next call.
*/
std::size_t input_processed;
bool flush_output;
/*
* For flush_output, this is how far we got in the output buffer before
* we ran out of space for samples. The caller should flush this many
* bytes downstream.
*/
std::size_t output_written;
};
virtual auto ResetForNewStream() -> void = 0;
virtual auto SetInput(uint8_t* buffer, std::size_t length) = 0;
virtual auto Process(uint8_t* output, std::size_t output_length)
-> cpp::result<size_t, Error> = 0;
virtual auto GetOutputProcessed() -> std::size_t;
= 0;
};
} // namespace codecs
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