mirror of
https://github.com/RGBCube/serenity
synced 2025-05-18 14:15:08 +00:00
6e19ab2bbc
We have a new, improved string type coming up in AK (OOM aware, no null state), and while it's going to use UTF-8, the name UTF8String is a mouthful - so let's free up the String name by renaming the existing class. Making the old one have an annoying name will hopefully also help with quick adoption :^)
69 lines
2.6 KiB
C++
69 lines
2.6 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* Copyright (c) 2021, 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/DeprecatedString.h>
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#include <AK/FixedArray.h>
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#include <AK/OwnPtr.h>
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#include <AK/RefPtr.h>
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#include <AK/Span.h>
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#include <AK/StringView.h>
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#include <LibAudio/Loader.h>
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#include <LibCore/File.h>
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#include <LibCore/Stream.h>
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namespace Audio {
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// constants for handling the WAV header data
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static constexpr unsigned const WAVE_FORMAT_PCM = 0x0001; // PCM
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static constexpr unsigned const WAVE_FORMAT_IEEE_FLOAT = 0x0003; // IEEE float
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static constexpr unsigned const WAVE_FORMAT_ALAW = 0x0006; // 8-bit ITU-T G.711 A-law
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static constexpr unsigned const WAVE_FORMAT_MULAW = 0x0007; // 8-bit ITU-T G.711 µ-law
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static constexpr unsigned const WAVE_FORMAT_EXTENSIBLE = 0xFFFE; // Determined by SubFormat
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// Parses and reads audio data from a WAV file.
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class WavLoaderPlugin : public LoaderPlugin {
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public:
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explicit WavLoaderPlugin(NonnullOwnPtr<Core::Stream::SeekableStream> stream);
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static Result<NonnullOwnPtr<WavLoaderPlugin>, LoaderError> try_create(StringView path);
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static Result<NonnullOwnPtr<WavLoaderPlugin>, LoaderError> try_create(Bytes buffer);
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virtual LoaderSamples get_more_samples(size_t max_samples_to_read_from_input = 128 * KiB) override;
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virtual MaybeLoaderError reset() override { return seek(0); }
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// sample_index 0 is the start of the raw audio sample data
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// within the file/stream.
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virtual MaybeLoaderError seek(int sample_index) override;
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virtual int loaded_samples() override { return static_cast<int>(m_loaded_samples); }
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virtual int total_samples() override { return static_cast<int>(m_total_samples); }
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virtual u32 sample_rate() override { return m_sample_rate; }
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virtual u16 num_channels() override { return m_num_channels; }
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virtual DeprecatedString format_name() override { return "RIFF WAVE (.wav)"; }
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virtual PcmSampleFormat pcm_format() override { return m_sample_format; }
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private:
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MaybeLoaderError initialize();
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MaybeLoaderError parse_header();
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LoaderSamples samples_from_pcm_data(Bytes const& data, size_t samples_to_read) const;
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template<typename SampleReader>
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MaybeLoaderError read_samples_from_stream(Core::Stream::Stream& stream, SampleReader read_sample, FixedArray<Sample>& samples) const;
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u32 m_sample_rate { 0 };
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u16 m_num_channels { 0 };
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PcmSampleFormat m_sample_format;
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size_t m_byte_offset_of_data_samples { 0 };
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size_t m_loaded_samples { 0 };
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size_t m_total_samples { 0 };
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};
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}
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