chromium/src/third_party/blink/renderer/platform/audio/audio_file_reader.h

/*
 * Copyright (C) 2010 Google Inc. 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.
 * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
 *     its contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS 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
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#ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_AUDIO_AUDIO_FILE_READER_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_AUDIO_AUDIO_FILE_READER_H_

#include "base/memory/scoped_refptr.h"
#include "third_party/blink/renderer/platform/platform_export.h"

namespace blink {

class AudioBus;

// For both create functions:
// Pass in 0.0 for sampleRate to use the file's sample-rate, otherwise a
// sample-rate conversion to the requested sampleRate will be made (if it
// doesn't already match the file's sample-rate).  The created buffer will have
// its sample-rate set correctly to the result.

PLATFORM_EXPORT scoped_refptr<AudioBus> CreateBusFromInMemoryAudioFile(
    const void* data,
    size_t data_size,
    bool mix_to_mono,
    float sample_rate);

PLATFORM_EXPORT scoped_refptr<AudioBus> CreateBusFromAudioFile(
    const char* file_path,
    bool mix_to_mono,
    float sample_rate);

// May pass in 0.0 for sampleRate in which case it will use the AudioBus's
// sampleRate
PLATFORM_EXPORT void WriteBusToAudioFile(AudioBus* bus,
                                         const char* file_path,
                                         double file_sample_rate);

}  // namespace blink

#endif  // THIRD_PARTY_BLINK_RENDERER_PLATFORM_AUDIO_AUDIO_FILE_READER_H_