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https://github.com/RGBCube/serenity
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cb0e95c928
With the following change in how we send audio, the old Buffer type is not really needed anymore. However, moving WavLoader to the new system is a bit more involved and out of the scope of this PR. Therefore, we need to keep Buffer around, but to make it clear that it's the old buffer type which will be removed soon, we rename it to LegacyBuffer. Most of the users will be gone after the next commit anyways.
76 lines
2.4 KiB
C++
76 lines
2.4 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/MemoryStream.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/Stream.h>
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#include <AK/String.h>
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#include <AK/StringView.h>
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#include <AK/WeakPtr.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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#include <LibCore/FileStream.h>
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namespace Audio {
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class LegacyBuffer;
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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::LegacyBuffer.
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class WavLoaderPlugin : public LoaderPlugin {
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public:
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explicit WavLoaderPlugin(StringView path);
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explicit WavLoaderPlugin(Bytes const& buffer);
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virtual MaybeLoaderError initialize() override;
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// The Buffer returned contains input data resampled at the
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// destination audio device sample rate.
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virtual LoaderSamples get_more_samples(size_t max_bytes_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 const sample_index) 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 String format_name() override { return "RIFF WAVE (.wav)"; }
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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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MaybeLoaderError parse_header();
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RefPtr<Core::File> m_file;
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OwnPtr<AK::InputStream> m_stream;
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AK::InputMemoryStream* m_memory_stream;
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Optional<LoaderError> m_error {};
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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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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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