xenocara/driver/xf86-video-openchrome/libxvmc/vldXvMC.h

/*****************************************************************************
 * VLD Nonstandard XvMC extension.
 *
 * Copyright (c) 2004 The Unichrome Project. All rights reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHOR(S) OR COPYRIGHT HOLDER(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 *
 * Author: Thomas Hellstr<EFBFBD>m, 2004.
 */

#ifndef _VLDXVMC_H
#define _VLDXVMC_H

#include <X11/Xlib.h>
#include <X11/extensions/XvMC.h>
#include <X11/extensions/XvMClib.h>

/* 
 * New "Motion compensation type".
 */

#define XVMC_VLD 0x0020000

/*
 * Below Flags to be passed in the XvMCMpegControl structure 'flag' field.
 */

#define XVMC_PROGRESSIVE_SEQUENCE 0x00000010

/*
 * Zig-Zag Scan / Alternative Scan.
 */

#define XVMC_ZIG_ZAG_SCAN         0x00000000
#define XVMC_ALTERNATE_SCAN       0x00000100

/*
 * Frame DCT and frame prediction are used. /
 * Field prediction
 */

#define XVMC_PRED_DCT_FRAME       0x00000040
#define XVMC_PRED_DCT_FIELD       0x00000000

/*
 * Top / Bottom field first
 */

#define XVMC_TOP_FIELD_FIRST      0x00000080
#define XVMC_BOTTOM_FIELD_FIRST   0x00000000

/*
 * Motion vectors coded in intra macroblocks
 */

#define XVMC_CONCEALMENT_MOTION_VECTORS 0x00000200

/*
 * Which of two mappings between quantiser_scale_code
 * and quantiser_scale shall apply.
 */

#define XVMC_Q_SCALE_TYPE         0x00000400

/*
 * Intra VLC Format: Bit = 0,  Bit = 1
 * Intra blocks      B-14      B-15
 * Non-intra blocks  B-14      B-14
 */
#define XVMC_INTRA_VLC_FORMAT     0x00000800

/*
 * Also XVMC_SECOND_FIELD should be set in flags if active. 
 */

#define XVMC_I_PICTURE 1
#define XVMC_P_PICTURE 2
#define XVMC_B_PICTURE 3

typedef struct _XvMCMpegControl
{
    unsigned BVMV_range,	       /* Backward vertical motion vector range */
        BHMV_range,		       /* Backward horizontal motion vector range */
        FVMV_range,		       /* Forward vertical motion vector range */
        FHMV_range,		       /* Forward horizontal motion vector range */
        picture_structure,	       /* XVMC_TOP_FIELD, XVMC_BOTTOM_FIELD, 
				        *  XVMC_FRAME_PICTURE
				        */
        intra_dc_precision,	       /* 0x00 - 0x03 corresponds to 8 to 11 bits prec. */
        picture_coding_type,	       /* XVMC_X_PICTURE */
        mpeg_coding,		       /* XVMC_MPEG_2 */
        flags;			       /* See above */
} XvMCMpegControl;

/*
 * The following function is called BEFORE starting sending slices to the
 * lib. It grabs the decoder hardware and prepares it for coming slices.
 * The function XvMCSyncSurface will release the hardware for other contexts
 * in addition to it's current functionality.
 */

extern Status XvMCBeginSurface(Display * display,
    XvMCContext * context,
    XvMCSurface * target_surface,
    XvMCSurface * past_surface,
    XvMCSurface * future_surface, const XvMCMpegControl * control);

/*
 * The quantizer matrix structure. This should be filled in by the user and
 * uploaded whenever a change is needed. The lib initializes with 
 * default matrices and will automatically load the hardware with new matrices
 * on decoder context switches. To load data, set the corresponding load flag
 * to true and fill in the values. The VIA MPEG2 engine only uses the
 * intra_quantiser_matrix and the non_intra_quantiser_matrix. RFC: Are
 * the other fields needed for future compatibility?
 */

typedef struct _XvMCQMatrix
{
    int load_intra_quantiser_matrix;
    int load_non_intra_quantiser_matrix;
    int load_chroma_intra_quantiser_matrix;
    int load_chroma_non_intra_quantiser_matrix;
    unsigned char intra_quantiser_matrix[64];
    unsigned char non_intra_quantiser_matrix[64];
    unsigned char chroma_intra_quantiser_matrix[64];
    unsigned char chroma_non_intra_quantiser_matrix[64];
} XvMCQMatrix;

/*
 * Upload a XvMCQMatrix structure to the clientlib. 
 * The hardware will start using it the next XvMCBeginSurface.
 */

extern Status XvMCLoadQMatrix(Display * display, XvMCContext * context,
    const XvMCQMatrix * qmx);

/*
 * Put a slice to the decoder. The hardware will start processing it 
 * immediately.
 */

extern Status XvMCPutSlice(Display * display, XvMCContext * context,
    char *slice, int nBytes);
/*
 * Put a slice without the slice start code to the decoder. 
 * The hardware will start processing it 
 * immediately. This function is for client optimization. 
 * XvMCPutSlice(display,context,slice,nBytes) is equivalent to
 * XvMCPutSlice2(display,context,slice+4,nBytes-4,slice[3]);
 */

extern Status XvMCPutSlice2(Display * display, XvMCContext * context,
    char *slice, int nBytes, int sliceCode);

/*
 * Debug the XvMCControl structure. For convenience only. 
 */

extern void debugControl(const XvMCMpegControl * control);

#endif