render.c

来自「VLC媒体播放程序」· C语言 代码 · 共 528 行 · 第 1/2 页

                           || i_y < i_y_start || i_y > i_y_end ) )
                {
                    continue;
                }

                switch( p_spu->p_sys->pi_alpha[ i_color ] )
                {
                case 0x00:
                    break;

                case 0x0f:
                    for( i_ytmp = i_yreal ; i_ytmp < i_ynext ;
                         i_ytmp += p_pic->p->i_pitch )
                    {
                        memset( p_dest - 2 * ( i_x >> 6 ) + i_ytmp,
                                p_clut16[ i_color ],
                                2 * ( ( i_len >> 6 ) + 1 ) );
                    }
                    break;

                default:
                    /* FIXME: we should do transparency */
                    for( i_ytmp = i_yreal ; i_ytmp < i_ynext ;
                         i_ytmp += p_pic->p->i_pitch )
                    {
                        memset( p_dest - 2 * ( i_x >> 6 ) + i_ytmp,
                                p_clut16[ i_color ],
                                2 * ( ( i_len >> 6 ) + 1 ) );
                    }
                    break;
                }
            }
        }
    }
}

static void RenderRV32( vout_thread_t *p_vout, picture_t *p_pic,
                        const subpicture_t *p_spu, vlc_bool_t b_crop )
{
    /* Common variables */
    uint32_t p_clut32[4];
    uint8_t *p_dest;
    uint16_t *p_source = (uint16_t *)p_spu->p_sys->p_data;

    int i_x, i_y;
    int i_len, i_color;

    /* RGB-specific */
    int i_xscale, i_yscale, i_width, i_height, i_ytmp, i_yreal, i_ynext;

    /* Crop-specific */
    int i_x_start, i_y_start, i_x_end, i_y_end;

    /* XXX: this is a COMPLETE HACK, memcpy is unable to do u32s anyway */
    /* FIXME: get this from the DVD */
    for( i_color = 0; i_color < 4; i_color++ )
    {
        p_clut32[i_color] = 0x11111111
                             * ( (uint16_t)p_spu->p_sys->pi_yuv[i_color][0] >> 4 );
    }

    i_xscale = ( p_vout->output.i_width << 6 ) / p_vout->render.i_width;
    i_yscale = ( p_vout->output.i_height << 6 ) / p_vout->render.i_height;

    i_width  = p_spu->i_width  * i_xscale;
    i_height = p_spu->i_height * i_yscale;

    i_x_start = i_width - i_xscale * p_spu->p_sys->i_x_end;
    i_y_start = i_yscale * p_spu->p_sys->i_y_start;
    i_x_end = i_width - i_xscale * p_spu->p_sys->i_x_start;
    i_y_end = i_yscale * p_spu->p_sys->i_y_end;

    p_dest = p_pic->p->p_pixels + ( i_width >> 6 ) * 4
              /* Add the picture coordinates and the SPU coordinates */
              + ( (p_spu->i_x * i_xscale) >> 6 ) * 4
              + ( (p_spu->i_y * i_yscale) >> 6 ) * p_pic->p->i_pitch;

    /* Draw until we reach the bottom of the subtitle */
    for( i_y = 0 ; i_y < i_height ; )
    {
        i_ytmp = i_y >> 6;
        i_y += i_yscale;

        /* Check whether we need to draw one line or more than one */
        if( i_ytmp + 1 >= ( i_y >> 6 ) )
        {
            /* Just one line : we precalculate i_y >> 6 */
            i_yreal = p_pic->p->i_pitch * i_ytmp;

            /* Draw until we reach the end of the line */
            for( i_x = i_width ; i_x ; i_x -= i_len )
            {
                /* Get the RLE part, then draw the line */
                i_color = *p_source & 0x3;
                i_len = i_xscale * ( *p_source++ >> 2 );

                if( b_crop
                     && ( i_x < i_x_start || i_x > i_x_end
                           || i_y < i_y_start || i_y > i_y_end ) )
                {
                    continue;
                }

                switch( p_spu->p_sys->pi_alpha[ i_color ] )
                {
                case 0x00:
                    break;

                case 0x0f:
                    memset( p_dest - 4 * ( i_x >> 6 ) + i_yreal,
                            p_clut32[ i_color ], 4 * ( ( i_len >> 6 ) + 1 ) );
                    break;

                default:
                    /* FIXME: we should do transparency */
                    memset( p_dest - 4 * ( i_x >> 6 ) + i_yreal,
                            p_clut32[ i_color ], 4 * ( ( i_len >> 6 ) + 1 ) );
                    break;
                }
            }
        }
        else
        {
            i_yreal = p_pic->p->i_pitch * i_ytmp;
            i_ynext = p_pic->p->i_pitch * i_y >> 6;

            /* Draw until we reach the end of the line */
            for( i_x = i_width ; i_x ; i_x -= i_len )
            {
                /* Get the RLE part, then draw as many lines as needed */
                i_color = *p_source & 0x3;
                i_len = i_xscale * ( *p_source++ >> 2 );

                if( b_crop
                     && ( i_x < i_x_start || i_x > i_x_end
                           || i_y < i_y_start || i_y > i_y_end ) )
                {
                    continue;
                }

                switch( p_spu->p_sys->pi_alpha[ i_color ] )
                {
                case 0x00:
                    break;

                case 0x0f:
                    for( i_ytmp = i_yreal ; i_ytmp < i_ynext ;
                         i_ytmp += p_pic->p->i_pitch )
                    {
                        memset( p_dest - 4 * ( i_x >> 6 ) + i_ytmp,
                                p_clut32[ i_color ],
                                4 * ( ( i_len >> 6 ) + 1 ) );
                    }
                    break;

                default:
                    /* FIXME: we should do transparency */
                    for( i_ytmp = i_yreal ; i_ytmp < i_ynext ;
                         i_ytmp += p_pic->p->i_pitch )
                    {
                        memset( p_dest - 4 * ( i_x >> 6 ) + i_ytmp,
                                p_clut32[ i_color ],
                                4 * ( ( i_len >> 6 ) + 1 ) );
                    }
                    break;
                }
            }
        }
    }
}

static void RenderYUY2( vout_thread_t *p_vout, picture_t *p_pic,
                        const subpicture_t *p_spu, vlc_bool_t b_crop )
{
    /* Common variables */
    uint8_t *p_dest;
    uint16_t *p_source = (uint16_t *)p_spu->p_sys->p_data;

    int i_x, i_y;
    int i_len, i_color;
    uint8_t i_cnt;

    /* Crop-specific */
    int i_x_start, i_y_start, i_x_end, i_y_end;

    p_dest = p_pic->p->p_pixels +
              + ( p_spu->i_y + p_spu->i_height ) * p_pic->p->i_pitch  // * bytes per line
              + ( p_spu->i_x + p_spu->i_width ) * 2;  // * bytes per pixel

    i_x_start = p_spu->i_width - p_spu->p_sys->i_x_end;
    i_y_start = (p_spu->i_height - p_spu->p_sys->i_y_end)
                  * p_pic->p->i_pitch / 2;
    i_x_end = p_spu->i_width - p_spu->p_sys->i_x_start;
    i_y_end = (p_spu->i_height - p_spu->p_sys->i_y_start)
                * p_pic->p->i_pitch / 2;

    /* Draw until we reach the bottom of the subtitle */
    for( i_y = p_spu->i_height * p_pic->p->i_pitch / 2;
         i_y ;
         i_y -= p_pic->p->i_pitch / 2 )
    {
        /* Draw until we reach the end of the line */
        for( i_x = p_spu->i_width ; i_x ; i_x -= i_len )
        {
            /* Get the RLE part, then draw the line */
            i_color = *p_source & 0x3;
            i_len = *p_source++ >> 2;

            if( b_crop
                 && ( i_x < i_x_start || i_x > i_x_end
                       || i_y < i_y_start || i_y > i_y_end ) )
            {
                continue;
            }

            switch( p_spu->p_sys->pi_alpha[ i_color ] )
            {
            case 0x00:
                break;

            case 0x0f:
                for( i_cnt = 0; i_cnt < i_len; i_cnt++ )
                {
                    /* draw a pixel */
                    /* Y */
                    memset( p_dest - i_x * 2 - i_y * 2 + i_cnt * 2,
                            p_spu->p_sys->pi_yuv[i_color][0], 1);

                    if (!(i_cnt & 0x01))
                    {
                        /* U and V */
                        memset( p_dest - i_x * 2 - i_y * 2 + i_cnt * 2 + 1,
                                0x80, 1);
                        memset( p_dest - i_x * 2 - i_y * 2 + i_cnt * 2 + 3,
                                0x80, 1);
                    }
                }
                break;

            default:
                /* FIXME: we should do transparency */
                for( i_cnt = 0; i_cnt < i_len; i_cnt++ )
                {
                    /* draw a pixel */
                    /* Y */
                    memset( p_dest - i_x * 2 - i_y * 2 + i_cnt * 2,
                            p_spu->p_sys->pi_yuv[i_color][0], 1);

                    if (!(i_cnt & 0x01))
                    {
                        /* U and V */
                        memset( p_dest - i_x * 2 - i_y * 2 + i_cnt * 2 + 1,
                                0x80, 1);
                        memset( p_dest - i_x * 2 - i_y * 2 + i_cnt * 2 + 3,
                                0x80, 1);
                    }
                }
                break;
            }
        }
    }
}