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