third_party/WebKit/Source/platform/audio/AudioFileReader.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
 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS 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.
 */

#ifndef AudioFileReader_h
#define AudioFileReader_h

#include "platform/PlatformExport.h"
#include "wtf/PassRefPtr.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 PassRefPtr<AudioBus> createBusFromInMemoryAudioFile(
    const void* data,
    size_t dataSize,
    bool mixToMono,
    float sampleRate);

PLATFORM_EXPORT PassRefPtr<AudioBus>
createBusFromAudioFile(const char* filePath, bool mixToMono, float sampleRate);

// 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* filePath,
                                         double fileSampleRate);

}  // namespace blink

#endif  // AudioFileReader_h