pictureheader.h

Linux下比较早的基于命令行的DVD播放器

//
// Copyright (c) 2004 by Istv醤 V醨adi
//
// This file is part of dxr3Player, a DVD player written specifically 
// for the DXR3 (aka Hollywood+) decoder card, but now handles other
// hardware as well.

// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

#ifndef MPEG_PICTUREHEADER_H
#define MPEG_PICTUREHEADER_H
//------------------------------------------------------------------------------

namespace mpeg {

//------------------------------------------------------------------------------

/**
 * Picture header.
 */
class PictureHeader 
{
public:
    /**
     * Picture coding types.
     */
    typedef enum codingType_t {
        /// Intra-coded
        CODING_I,

        /// Predictive-coded
        CODING_P,

        /// Bidirectionally predictive-coded
        CODING_B,

        /// Unknown coding type
        CODING_UNKNOWN
    };

    /**
     * Picture structures.
     */
    typedef enum pictureStructure_t {
        // Top Field
        PICTURE_TOP,

        // Bottom Field
        PICTURE_BOTTOM,

        // Frame picture
        PICTURE_FRAME,

        // Unknown
        PICTURE_UNKNOWN
    };

    /**
     * Temporal reference.
     */
    unsigned temporalReference;

    /**
     * The coding of the picture.
     */
    codingType_t codingType;

    /**
     * The VBV delay.
     */
    unsigned vbvDelay;

    /**
     * F-code.
     */
    unsigned fCode[2][2];

    /**
     * Intra DC precision.
     */
    unsigned intraDCPrecision;

    /**
     * The picture structure.
     */
    pictureStructure_t pictureStructure;

    /**
     * Indicate if the top field is first in some respect.
     */
    bool topFieldFirst;

    /**
     * Indicate if only frame DCT and frame prediction is used.
     */
    bool onlyFramePredAndDCT;

    /**
     * Indicate of concealment motion vectors are present.
     */
    bool hasConcealmentMotionVectors;

    /**
     * Quantiser scale type.
     */
    bool quantiserScaleType;

    /**
     * Format of the intra-VLC values.
     */
    bool intraVLCFormat;
    
    /**
     * Indicate if the alternate scan mode should be used.
     */
    bool alternateScan;

    /**
     * Indicate if the first field should be repeated.
     */
    bool repeatFirstField;

    /**
     * Indicate if this is a progressive frame.
     */
    bool progressiveFrame;

    /**
     * Indicate that the input pictures have been coded as composite
     * video.
     */
    bool compositeDisplay;

    /**
     * V-axis value for PAL signals. (Valid only if compositeDisplay is true.)
     */
    unsigned vAxis;

    /**
     * Field sequence number. (Valid only if compositeDisplay is true.)
     */
    unsigned fieldSequence;

    /**
     * Indicate if the sub-carrier/line frequency relationship is not
     * correct. (Valid only if compositeDisplay is true.)
     */
    bool subCarrierNOK;

    /**
     * Burst amplitude.
     */
    unsigned burstAmplitude;

    /**
     * Sub-carrier phase.
     */
    unsigned subCarrierPhase;

    /**
     * Log the contents of the picture header.
     */
    void log() const;
};

//------------------------------------------------------------------------------

} /* namespace mpeg */

//------------------------------------------------------------------------------
#endif // MPEG_PICTUREHEADER_H

// Local variables:
// mode: c++
// End: