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loadsurface.h

/*
 * Copyright (c) 2008-2009 Intel Corporation. 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, sub license, 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 (including the
 * next paragraph) 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 NON-INFRINGEMENT.
 * IN NO EVENT SHALL PRECISION INSIGHT AND/OR ITS SUPPLIERS 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.
 */


static int yuvgen_planar(int width, int height,
                         unsigned char *Y_start, int Y_pitch,
                         unsigned char *U_start, int U_pitch,
                         unsigned char *V_start, int V_pitch,
                         int UV_interleave, int box_width, int row_shift,
                         int field)
{
    int row;

    /* copy Y plane */
    for (row=0;row<height;row++) {
        unsigned char *Y_row = Y_start + row * Y_pitch;
        int jj, xpos, ypos;

        ypos = (row / box_width) & 0x1;

        /* fill garbage data into the other field */
        if (((field == VA_TOP_FIELD) && (row &1))
            || ((field == VA_BOTTOM_FIELD) && ((row &1)==0))) { 
            memset(Y_row, 0xff, width);
            continue;
        }
        
        for (jj=0; jj<width; jj++) {
            xpos = ((row_shift + jj) / box_width) & 0x1;
                        
            if ((xpos == 0) && (ypos == 0))
                Y_row[jj] = 0xeb;
            if ((xpos == 1) && (ypos == 1))
                Y_row[jj] = 0xeb;
                        
            if ((xpos == 1) && (ypos == 0))
                Y_row[jj] = 0x10;
            if ((xpos == 0) && (ypos == 1))
                Y_row[jj] = 0x10;
        }
    }
  
    /* copy UV data */
    for( row =0; row < height/2; row++) {
        unsigned short value = 0x80;

        /* fill garbage data into the other field */
        if (((field == VA_TOP_FIELD) && (row &1))
            || ((field == VA_BOTTOM_FIELD) && ((row &1)==0))) {
            value = 0xff;
        }

        if (UV_interleave) {
            unsigned short *UV_row = (unsigned short *)(U_start + row * U_pitch);

            memset(UV_row, value, width);
        } else {
            unsigned char *U_row = U_start + row * U_pitch;
            unsigned char *V_row = V_start + row * V_pitch;
            
            memset (U_row,value,width/2);
            memset (V_row,value,width/2);
        }
    }

    return 0;
}

static int upload_surface(VADisplay va_dpy, VASurfaceID surface_id,
                          int box_width, int row_shift,
                          int field)
{
    VAImage surface_image;
    void *surface_p=NULL, *U_start,*V_start;
    VAStatus va_status;
    
    va_status = vaDeriveImage(va_dpy,surface_id,&surface_image);
    CHECK_VASTATUS(va_status,"vaDeriveImage");

    vaMapBuffer(va_dpy,surface_image.buf,&surface_p);
    assert(VA_STATUS_SUCCESS == va_status);
        
    U_start = surface_p + surface_image.offsets[1];
    V_start = surface_p + surface_image.offsets[2];

    /* assume surface is planar format */
    yuvgen_planar(surface_image.width, surface_image.height,
                  surface_p, surface_image.pitches[0],
                  U_start, surface_image.pitches[1],
                  V_start, surface_image.pitches[2],
                  (surface_image.format.fourcc==VA_FOURCC_NV12),
                  box_width, row_shift, field);
        
    vaUnmapBuffer(va_dpy,surface_image.buf);

    vaDestroyImage(va_dpy,surface_image.image_id);

    return 0;
}

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