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https://github.com/RGBCube/serenity
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563cc17a50
LibAudio's WavLoader plugin for loading WAV files now supports loading audio files with 32-bit float or 64-bit float samples. By supporting these new non-int sample formats, Audio::Buffer now stores the sample format (out of a list of supported formats) instead of the raw bit depth. (The bit depth is easily calculated with pcm_bits_per_sample)
70 lines
2.1 KiB
C++
70 lines
2.1 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* Copyright (c) 2021, kleines Filmröllchen <malu.bertsch@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/ByteBuffer.h>
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#include <AK/MemoryStream.h>
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#include <AK/OwnPtr.h>
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#include <AK/RefPtr.h>
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#include <AK/String.h>
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#include <AK/StringView.h>
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#include <LibAudio/Buffer.h>
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#include <LibAudio/Loader.h>
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#include <LibCore/File.h>
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namespace Audio {
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class Buffer;
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// defines for handling the WAV header data
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#define WAVE_FORMAT_PCM 0x0001 // PCM
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#define WAVE_FORMAT_IEEE_FLOAT 0x0003 // IEEE float
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#define WAVE_FORMAT_ALAW 0x0006 // 8-bit ITU-T G.711 A-law
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#define WAVE_FORMAT_MULAW 0x0007 // 8-bit ITU-T G.711 µ-law
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#define WAVE_FORMAT_EXTENSIBLE 0xFFFE // Determined by SubFormat
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// Parses a WAV file and produces an Audio::Buffer.
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class WavLoaderPlugin : public LoaderPlugin {
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public:
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WavLoaderPlugin(const StringView& path);
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WavLoaderPlugin(const ByteBuffer& buffer);
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virtual bool sniff() override;
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virtual bool has_error() override { return !m_error_string.is_null(); }
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virtual const char* error_string() override { return m_error_string.characters(); }
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virtual RefPtr<Buffer> get_more_samples(size_t max_bytes_to_read_from_input = 128 * KiB) override;
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virtual void reset() override;
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virtual void seek(const int position) override;
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virtual int loaded_samples() override { return m_loaded_samples; }
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virtual int total_samples() override { return 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 PcmSampleFormat pcm_format() override { return m_sample_format; }
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virtual RefPtr<Core::File> file() override { return m_file; }
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private:
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bool parse_header();
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bool valid { false };
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RefPtr<Core::File> m_file;
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OwnPtr<InputMemoryStream> m_stream;
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String m_error_string;
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OwnPtr<ResampleHelper> m_resampler;
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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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int m_loaded_samples { 0 };
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int m_total_samples { 0 };
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};
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}
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