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38 lines
1.5 KiB
C++
38 lines
1.5 KiB
C++
/*
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* Copyright (c) 2023, kleines Filmröllchen <filmroellchen@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/Error.h>
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#include <AK/Span.h>
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#include <LibAudio/Forward.h>
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#include <LibAudio/Sample.h>
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namespace Audio {
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class Encoder {
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public:
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virtual ~Encoder() = default;
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// Encodes the given samples and writes them to the output stream.
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// Note that due to format restrictions, not all samples might be written immediately, this is only guaranteed after a call to finalize().
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virtual ErrorOr<void> write_samples(ReadonlySpan<Sample> samples) = 0;
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// Finalizes the stream, future calls to write_samples() will cause an error.
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// This method makes sure that all samples are encoded and written out.
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// This method is called in the destructor, but since this can error, you should call this function yourself before disposing of the decoder.
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virtual ErrorOr<void> finalize() = 0;
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// Sets the metadata for this audio file.
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// Not all encoders support this, and metadata may not be writeable after starting to write samples.
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virtual ErrorOr<void> set_metadata([[maybe_unused]] Metadata const& metadata) { return {}; }
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// Provides a hint about the total number of samples to the encoder, improving some encoder's performance in various aspects.
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// Note that the hint does not have to be fully correct; wrong hints never cause errors, not even indirectly.
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virtual void sample_count_hint([[maybe_unused]] size_t sample_count) { }
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};
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}
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