ffmpeg/libavcodec/xvmc.h

/*
 * Copyright (C) 2003 Ivan Kalvachev
 *
 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * FFmpeg 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with FFmpeg; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

#ifndef AVCODEC_XVMC_H
#define AVCODEC_XVMC_H

#include <X11/extensions/XvMC.h>

#include "avcodec.h"

/**the surface should be shown, the video driver manipulates this*/
#define AV_XVMC_STATE_DISPLAY_PENDING 1
/**the surface is needed for prediction, the codec manipulates this*/
#define AV_XVMC_STATE_PREDICTION      2
/**this surface is needed for subpicture rendering*/
#define AV_XVMC_STATE_OSD_SOURCE      4
/**<magic value to ensure that regular pixel routines haven't corrupted the struct*/
//                              1337    IDCT MCo
#define AV_XVMC_RENDER_MAGIC          0x1DC711C0

#if LIBAVCODEC_VERSION_MAJOR < 53
#define MP_XVMC_STATE_DISPLAY_PENDING AV_XVMC_STATE_DISPLAY_PENDING
#define MP_XVMC_STATE_PREDICTION      AV_XVMC_STATE_PREDICTION
#define MP_XVMC_STATE_OSD_SOURCE      AV_XVMC_STATE_OSD_SOURCE
#define MP_XVMC_RENDER_MAGIC          AV_XVMC_RENDER_MAGIC
#endif

struct xvmc_render_state {
/** set by calling application */
//@{
    int             magic;              ///< used as check for memory corruption by regular pixel routines

    short*          data_blocks;
    XvMCMacroBlock* mv_blocks;
    int             total_number_of_mv_blocks;
    int             total_number_of_data_blocks;
    int             mc_type;            ///<XVMC_MPEG1/2/4,XVMC_H263 without XVMC_IDCT
    int             idct;               ///< indicate that IDCT acceleration level is used
    int             chroma_format;      ///< XVMC_CHROMA_FORMAT_420/422/444
    int             unsigned_intra;     ///<+-128 for intra pictures after clipping
    XvMCSurface*    p_surface;          ///<pointer to rendered surface, never changed
//}@

/** set by the decoder
    used by the XvMCRenderSurface function */
//@{
    XvMCSurface* p_past_surface;    ///<pointer to the past surface
    XvMCSurface* p_future_surface;  ///<pointer to the future prediction surface

    unsigned int picture_structure; ///<top/bottom fields or frame!
    unsigned int flags;             ///<XVMC_SECOND_FIELD - 1st or 2nd field in the sequence
    unsigned int display_flags;     ///<1,2 or 1+2 fields for XvMCPutSurface
//}@

/** modified by calling application and the decoder */
//@{
    int state;                      ///<0 - free, 1 - waiting to display, 2 - waiting for prediction
    int start_mv_blocks_num;        ///<offset in the array for the current slice, updated by vo
    int filled_mv_blocks_num;       ///<processed mv block in this slice, changed by decoder

    int next_free_data_block_num;   ///<used in add_mv_block, pointer to next free block
//}@
/** extensions */
//@{
    void * p_osd_target_surface_render; ///<pointer to the surface where subpicture is rendered
//}@

};

#endif /* AVCODEC_XVMC_H */