mirror of
https://github.com/RGBCube/serenity
synced 2025-07-06 13:17:35 +00:00
963a6b3d3d
We were calling write syscall twice for every sample, which effectively hurt the writer's performance. With this change exporting a melody in the Piano app now takes less than a second, which previously took about 20 seconds on my machine. Additionally, I've removed an unused `WavWriter::file()` getter.
53 lines
1.7 KiB
C++
53 lines
1.7 KiB
C++
/*
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* Copyright (c) 2020, William McPherson <willmcpherson2@gmail.com>
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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/DeprecatedString.h>
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#include <AK/Noncopyable.h>
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#include <AK/RefPtr.h>
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#include <AK/StringView.h>
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#include <LibAudio/Encoder.h>
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#include <LibAudio/Sample.h>
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#include <LibAudio/SampleFormats.h>
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#include <LibCore/File.h>
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#include <LibCore/Forward.h>
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namespace Audio {
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class WavWriter : public Encoder {
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AK_MAKE_NONCOPYABLE(WavWriter);
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AK_MAKE_NONMOVABLE(WavWriter);
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public:
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static ErrorOr<NonnullOwnPtr<WavWriter>> create_from_file(StringView path, int sample_rate = 44100, u16 num_channels = 2, PcmSampleFormat sample_format = PcmSampleFormat::Int16);
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WavWriter(int sample_rate = 44100, u16 num_channels = 2, PcmSampleFormat sample_format = PcmSampleFormat::Int16);
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~WavWriter();
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virtual ErrorOr<void> write_samples(ReadonlySpan<Sample> samples) override;
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virtual ErrorOr<void> finalize() override;
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u32 sample_rate() const { return m_sample_rate; }
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u16 num_channels() const { return m_num_channels; }
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PcmSampleFormat sample_format() const { return m_sample_format; }
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ErrorOr<void> set_file(StringView path);
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void set_num_channels(int num_channels) { m_num_channels = num_channels; }
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void set_sample_rate(int sample_rate) { m_sample_rate = sample_rate; }
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void set_sample_format(PcmSampleFormat sample_format) { m_sample_format = sample_format; }
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private:
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ErrorOr<void> write_header();
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OwnPtr<Core::OutputBufferedFile> m_file;
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bool m_finalized { false };
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u32 m_sample_rate;
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u16 m_num_channels;
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PcmSampleFormat m_sample_format;
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u32 m_data_sz { 0 };
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};
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}
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