wall.c

video linux conference

    p_vout->p_sys->i_vout = 0;
    msg_Dbg( p_vout, "target window (%d,%d)-(%d,%d)", i_hstart,i_vstart,i_hend,i_vend );
    

    i_top = 0;
    i_height = 0;
    for( i_row = 0; i_row < p_vout->p_sys->i_row; i_row++ )
    {
        i_left = 0;
        i_top += i_height;
        for( i_col = 0; i_col < p_vout->p_sys->i_col; i_col++ )
        {
            i_align = 0;

            if( i_col*i_target_width >= i_hstart &&
                (i_col+1)*i_target_width <= i_hend )
            {
                i_width = i_target_width;
            }
            else if( ( i_col + 1 ) * i_target_width < i_hstart ||
                     ( i_col * i_target_width ) > i_hend )
            {
                i_width = 0;                
            }
            else
            {
                i_width = ( i_target_width - i_hstart % i_target_width );
                if( i_col >= ( p_vout->p_sys->i_col / 2 ) )
                {
                    i_align |= VOUT_ALIGN_LEFT;
                    i_width -= i_hstart_rounded ? 2: 0;
                }
                else
                {
                    i_align |= VOUT_ALIGN_RIGHT;
                }
            }
            
            if( i_row * i_target_height >= i_vstart &&
                ( i_row + 1 ) * i_target_height <= i_vend )
            {
                i_height = i_target_height;
            }
            else if( ( i_row + 1 ) * i_target_height < i_vstart ||
                     ( i_row * i_target_height ) > i_vend )
            {
                i_height = 0;
            }
            else
            {
                i_height = ( i_target_height -
                             i_vstart%i_target_height );
                if(  i_row >= ( p_vout->p_sys->i_row / 2 ) )
                {
                    i_align |= VOUT_ALIGN_TOP;
                    i_height -= i_vstart_rounded ? 2: 0;
                }
                else
                {
                    i_align |= VOUT_ALIGN_BOTTOM;
                }
            }
            if( i_height == 0 || i_width == 0 )
            {
                p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].b_active = VLC_FALSE;
            }

            p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].i_width = i_width;
            p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].i_height = i_height;
            p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].i_left = i_left;
            p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].i_top = i_top;
            i_left += i_width;

            if( !p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].b_active )
            {
                p_vout->p_sys->i_vout++;
                continue;
            }
            var_SetInteger( p_vout, "align", i_align );
            var_SetInteger( p_vout, "video-x", i_left + i_xpos - i_width);
            var_SetInteger( p_vout, "video-y", i_top + i_ypos );

            fmt.i_width = fmt.i_visible_width = i_width;
            fmt.i_height = fmt.i_visible_height = i_height;
            fmt.i_aspect = i_aspect * i_target_height / i_height *
                i_width / i_target_width;

            p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].p_vout =
                vout_Create( p_vout, &fmt );
            if( !p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].p_vout )
            {
                msg_Err( p_vout, "failed to get %ix%i vout threads",
                                 p_vout->p_sys->i_col, p_vout->p_sys->i_row );
                RemoveAllVout( p_vout );
                return VLC_EGENERIC;
            }
            ADD_CALLBACKS(
                p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].p_vout,
                SendEvents );
            p_vout->p_sys->i_vout++;
        }
    }

    ALLOCATE_DIRECTBUFFERS( VOUT_MAX_PICTURES );

    ADD_PARENT_CALLBACKS( SendEventsToChild );

    return VLC_SUCCESS;
}

/*****************************************************************************
 * End: terminate Wall video thread output method
 *****************************************************************************/
static void End( vout_thread_t *p_vout )
{
    int i_index;

    /* Free the fake output buffers we allocated */
    for( i_index = I_OUTPUTPICTURES ; i_index ; )
    {
        i_index--;
        free( PP_OUTPUTPICTURE[ i_index ]->p_data_orig );
    }
}

/*****************************************************************************
 * Destroy: destroy Wall video thread output method
 *****************************************************************************
 * Terminate an output method created by WallCreateOutputMethod
 *****************************************************************************/
static void Destroy( vlc_object_t *p_this )
{
    vout_thread_t *p_vout = (vout_thread_t *)p_this;

    RemoveAllVout( p_vout );

    DEL_PARENT_CALLBACKS( SendEventsToChild );

    free( p_vout->p_sys->pp_vout );
    free( p_vout->p_sys );
}

/*****************************************************************************
 * Render: displays previously rendered output
 *****************************************************************************
 * This function send the currently rendered image to Wall image, waits
 * until it is displayed and switch the two rendering buffers, preparing next
 * frame.
 *****************************************************************************/
static void Render( vout_thread_t *p_vout, picture_t *p_pic )
{
    picture_t *p_outpic = NULL;
    int i_col, i_row, i_vout, i_plane;
    int pi_left_skip[VOUT_MAX_PLANES], pi_top_skip[VOUT_MAX_PLANES];

    i_vout = 0;

    for( i_row = 0; i_row < p_vout->p_sys->i_row; i_row++ )
    {
        for( i_col = 0; i_col < p_vout->p_sys->i_col; i_col++ )
        {
            for( i_plane = 0 ; i_plane < p_pic->i_planes ; i_plane++ )
            {
                pi_left_skip[i_plane] = p_vout->p_sys->pp_vout[ i_vout ].i_left * p_pic->p[ i_plane ].i_pitch / p_vout->output.i_width;
                pi_top_skip[i_plane] = (p_vout->p_sys->pp_vout[ i_vout ].i_top * p_pic->p[ i_plane ].i_lines / p_vout->output.i_height)*p_pic->p[i_plane].i_pitch;
            }

            if( !p_vout->p_sys->pp_vout[ i_vout ].b_active )
            {
                i_vout++;
                continue;
            }

            while( ( p_outpic =
                vout_CreatePicture( p_vout->p_sys->pp_vout[ i_vout ].p_vout,
                                    0, 0, 0 )
                   ) == NULL )
            {
                if( p_vout->b_die || p_vout->b_error )
                {
                    vout_DestroyPicture(
                        p_vout->p_sys->pp_vout[ i_vout ].p_vout, p_outpic );
                    return;
                }

                msleep( VOUT_OUTMEM_SLEEP );
            }

            vout_DatePicture( p_vout->p_sys->pp_vout[ i_vout ].p_vout,
                              p_outpic, p_pic->date );
            vout_LinkPicture( p_vout->p_sys->pp_vout[ i_vout ].p_vout,
                              p_outpic );

            for( i_plane = 0 ; i_plane < p_pic->i_planes ; i_plane++ )
            {
                uint8_t *p_in, *p_in_end, *p_out;
                int i_in_pitch = p_pic->p[i_plane].i_pitch;
                int i_out_pitch = p_outpic->p[i_plane].i_pitch;
                int i_copy_pitch = p_outpic->p[i_plane].i_visible_pitch;

                p_in = p_pic->p[i_plane].p_pixels
                        + pi_top_skip[i_plane] + pi_left_skip[i_plane];

                p_in_end = p_in + p_outpic->p[i_plane].i_visible_lines
                                   * p_pic->p[i_plane].i_pitch;

                p_out = p_outpic->p[i_plane].p_pixels;

                while( p_in < p_in_end )
                {
                    p_vout->p_vlc->pf_memcpy( p_out, p_in, i_copy_pitch );
                    p_in += i_in_pitch;
                    p_out += i_out_pitch;
                }

//                pi_left_skip[i_plane] += i_copy_pitch;
            }

            vout_UnlinkPicture( p_vout->p_sys->pp_vout[ i_vout ].p_vout,
                                p_outpic );
            vout_DisplayPicture( p_vout->p_sys->pp_vout[ i_vout ].p_vout,
                                 p_outpic );

            i_vout++;
        }

/*         for( i_plane = 0 ; i_plane < p_pic->i_planes ; i_plane++ ) */
/*         { */
/*             pi_top_skip[i_plane] += p_vout->p_sys->pp_vout[ i_vout ].i_height */
/*                                      * p_pic->p[i_plane].i_visible_lines */
/*                                      / p_vout->output.i_height */
/*                                      * p_pic->p[i_plane].i_pitch; */
/*         } */
    }
}

/*****************************************************************************
 * RemoveAllVout: destroy all the child video output threads
 *****************************************************************************/
static void RemoveAllVout( vout_thread_t *p_vout )
{
    while( p_vout->p_sys->i_vout )
    {
         --p_vout->p_sys->i_vout;
         if( p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].b_active )
         {
             DEL_CALLBACKS(
                 p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].p_vout,
                 SendEvents );
             vlc_object_detach(
                 p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].p_vout );
             vout_Destroy(
                 p_vout->p_sys->pp_vout[ p_vout->p_sys->i_vout ].p_vout );
         }
    }
}

/*****************************************************************************
 * SendEvents: forward mouse and keyboard events to the parent p_vout
 *****************************************************************************/
static int SendEvents( vlc_object_t *p_this, char const *psz_var,
                       vlc_value_t oldval, vlc_value_t newval, void *_p_vout )
{
    vout_thread_t *p_vout = (vout_thread_t *)_p_vout;
    int i_vout;
    vlc_value_t sentval = newval;

    /* Find the video output index */
    for( i_vout = 0; i_vout < p_vout->p_sys->i_vout; i_vout++ )
    {
        if( p_this == (vlc_object_t *)p_vout->p_sys->pp_vout[ i_vout ].p_vout )
        {
            break;
        }
    }

    if( i_vout == p_vout->p_sys->i_vout )
    {
        return VLC_EGENERIC;
    }

    /* Translate the mouse coordinates */
    if( !strcmp( psz_var, "mouse-x" ) )
    {
        sentval.i_int += p_vout->output.i_width
                          * (i_vout % p_vout->p_sys->i_col)
                          / p_vout->p_sys->i_col;
    }
    else if( !strcmp( psz_var, "mouse-y" ) )
    {
        sentval.i_int += p_vout->output.i_height
                          * (i_vout / p_vout->p_sys->i_row)
                          / p_vout->p_sys->i_row;
    }

    var_Set( p_vout, psz_var, sentval );

    return VLC_SUCCESS;
}

/*****************************************************************************
 * SendEventsToChild: forward events to the child/children vout
 *****************************************************************************/
static int SendEventsToChild( vlc_object_t *p_this, char const *psz_var,
                       vlc_value_t oldval, vlc_value_t newval, void *p_data )
{
    vout_thread_t *p_vout = (vout_thread_t *)p_this;
    int i_row, i_col, i_vout = 0;

    for( i_row = 0; i_row < p_vout->p_sys->i_row; i_row++ )
    {
        for( i_col = 0; i_col < p_vout->p_sys->i_col; i_col++ )
        {
            var_Set( p_vout->p_sys->pp_vout[ i_vout ].p_vout, psz_var, newval);
            if( !strcmp( psz_var, "fullscreen" ) ) break;
            i_vout++;
        }
    }

    return VLC_SUCCESS;
}