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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* Copyright (c) 2021, kleines Filmröllchen <malu.bertsch@gmail.com>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/ByteBuffer.h>
#include <AK/MemoryStream.h>
#include <AK/OwnPtr.h>
#include <AK/RefPtr.h>
#include <AK/Stream.h>
#include <AK/String.h>
#include <AK/StringView.h>
#include <AK/WeakPtr.h>
#include <LibAudio/Buffer.h>
#include <LibAudio/Loader.h>
#include <LibCore/File.h>
#include <LibCore/FileStream.h>
namespace Audio {
class Buffer;
// defines for handling the WAV header data
#define WAVE_FORMAT_PCM 0x0001 // PCM
#define WAVE_FORMAT_IEEE_FLOAT 0x0003 // IEEE float
#define WAVE_FORMAT_ALAW 0x0006 // 8-bit ITU-T G.711 A-law
#define WAVE_FORMAT_MULAW 0x0007 // 8-bit ITU-T G.711 µ-law
#define WAVE_FORMAT_EXTENSIBLE 0xFFFE // Determined by SubFormat
// Parses a WAV file and produces an Audio::Buffer.
class WavLoaderPlugin : public LoaderPlugin {
public:
WavLoaderPlugin(const StringView& path);
WavLoaderPlugin(const ByteBuffer& buffer);
virtual bool sniff() override { return valid; }
virtual bool has_error() override { return !m_error_string.is_null(); }
virtual const String& error_string() override { return m_error_string; }
// The Buffer returned contains input data resampled at the
// destination audio device sample rate.
virtual RefPtr<Buffer> get_more_samples(size_t max_bytes_to_read_from_input = 128 * KiB) override;
virtual void reset() override { return seek(0); }
// sample_index 0 is the start of the raw audio sample data
// within the file/stream.
virtual void seek(const int sample_index) override;
virtual int loaded_samples() override { return m_loaded_samples; }
virtual int total_samples() override { return m_total_samples; }
virtual u32 sample_rate() override { return m_sample_rate; }
virtual u16 num_channels() override { return m_num_channels; }
virtual PcmSampleFormat pcm_format() override { return m_sample_format; }
virtual RefPtr<Core::File> file() override { return m_file; }
private:
bool parse_header();
bool valid { false };
RefPtr<Core::File> m_file;
OwnPtr<AK::InputStream> m_stream;
AK::InputMemoryStream* m_memory_stream;
String m_error_string;
// TODO: We should probably move resampling into the audio server.
//
// It would avoid duplicate resampling code and would allow clients
// to be agnostic of the destination audio device's sample rate.
OwnPtr<ResampleHelper<double>> m_resampler;
u32 m_sample_rate { 0 };
u16 m_num_channels { 0 };
PcmSampleFormat m_sample_format;
size_t m_byte_offset_of_data_samples { 0 };
// FIXME: Get this value from the audio server
int m_device_sample_rate { 44100 };
int m_loaded_samples { 0 };
int m_total_samples { 0 };
};
}
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