Libraries: Move to Userland/Libraries/

Userland/Libraries/LibAudio/WavLoader.h

@@ -0,0 +1,82 @@
+/*
+ * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#pragma once
+
+#include <AK/ByteBuffer.h>
+#include <AK/MemoryStream.h>
+#include <AK/OwnPtr.h>
+#include <AK/RefPtr.h>
+#include <AK/String.h>
+#include <AK/StringView.h>
+#include <LibAudio/Buffer.h>
+#include <LibAudio/Loader.h>
+#include <LibCore/File.h>
+
+namespace Audio {
+class Buffer;
+
+// 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;
+
+    virtual bool has_error() override { return !m_error_string.is_null(); }
+    virtual const char* error_string() override { return m_error_string.characters(); }
+
+    virtual RefPtr<Buffer> get_more_samples(size_t max_bytes_to_read_from_input = 128 * KiB) override;
+
+    virtual void reset() override;
+    virtual void seek(const int position) 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 u16 bits_per_sample() override { return m_bits_per_sample; }
+    virtual RefPtr<Core::File> file() override { return m_file; }
+
+private:
+    bool parse_header();
+
+    bool valid { false };
+    RefPtr<Core::File> m_file;
+    OwnPtr<InputMemoryStream> m_stream;
+    String m_error_string;
+    OwnPtr<ResampleHelper> m_resampler;
+
+    u32 m_sample_rate { 0 };
+    u16 m_num_channels { 0 };
+    u16 m_bits_per_sample { 0 };
+
+    int m_loaded_samples { 0 };
+    int m_total_samples { 0 };
+};
+
+}