QTDecompressionSession.h   [plain text]

/*
 * Copyright (C) 2010 Apple, 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.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``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 COMPUTER, INC. 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. 
 */

#ifndef QTDecompressionSession_h
#define QTDecompressionSession_h

#ifdef QTMOVIEWIN_EXPORTS
#define QTMOVIEWIN_API __declspec(dllexport)
#else
#define QTMOVIEWIN_API __declspec(dllimport)
#endif

#include "QTPixelBuffer.h"

#include <wtf/PassOwnPtr.h>

class QTDecompressionSessionClient;
typedef struct OpaqueICMDecompressionSession*  ICMDecompressionSessionRef;

class QTMOVIEWIN_API QTDecompressionSession {
public:
    static PassOwnPtr<QTDecompressionSession> create(unsigned long pixelFormat, size_t width, size_t height);
    ~QTDecompressionSession();

    bool canDecompress(QTPixelBuffer);

    // The resulting QTPixelBuffer will be a CG compatable ARGB pixel buffer.
    QTPixelBuffer decompress(QTPixelBuffer);

private:
    friend class QTDecompressionSessionClient;
    QTDecompressionSession(unsigned long pixelFormat, size_t width, size_t height);
    void initializeSession();

    unsigned long m_pixelFormat;
    size_t m_width;
    size_t m_height;
    QTPixelBuffer m_latestFrame;
    ICMDecompressionSessionRef m_session;
};

#endif