Source/WebCore/platform/audio/mac/AudioFileReaderMac.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 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
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef AudioFileReaderMac_h
#define AudioFileReaderMac_h

#include <AudioToolbox/AudioFile.h>
#include <AudioToolbox/ExtendedAudioFile.h>
#include <wtf/RefPtr.h>

namespace WebCore {

class AudioBus;
    
// Wrapper class for AudioFile and ExtAudioFile CoreAudio APIs for reading files and in-memory versions of them...

class AudioFileReader {
public:
    explicit AudioFileReader(const char* filePath);
    explicit AudioFileReader(const void* data, size_t dataSize);
    ~AudioFileReader();

    // Returns nullptr if error
    RefPtr<AudioBus> createBus(float sampleRate, bool mixToMono);

    const void* data() const { return m_data; }
    size_t dataSize() const { return m_dataSize; }

private:
    static OSStatus readProc(void* clientData, SInt64 position, UInt32 requestCount, void* buffer, UInt32* actualCount);
    static SInt64 getSizeProc(void* clientData);

    const void* m_data;
    size_t m_dataSize;

    AudioFileID m_audioFileID;
    ExtAudioFileRef m_extAudioFileRef;

    AudioStreamBasicDescription m_fileDataFormat;
    AudioStreamBasicDescription m_clientDataFormat;
};

} // namespace WebCore
 
#endif // AudioFileReaderMac_h