logo.c

uclinux 下的vlc播放器源代码

    }

    p_vout->pf_init = Init;
    p_vout->pf_end = End;
    p_vout->pf_manage = NULL;
    p_vout->pf_render = Render;
    p_vout->pf_display = NULL;
    p_vout->pf_control = Control;

    p_logo_list->psz_filename = var_CreateGetString( p_this , "logo-file" );
    if( !p_logo_list->psz_filename || !*p_logo_list->psz_filename )
    {
        msg_Err( p_this, "logo file not specified" );
        return 0;
    }

    var_Create( p_this, "logo-position", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
    var_Get( p_this, "logo-position", &val );
    p_sys->pos = val.i_int;

    var_Create( p_this, "logo-x", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
    var_Get( p_this, "logo-x", &val );
    p_sys->posx = val.i_int;

    var_Create( p_this, "logo-y", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
    var_Get( p_this, "logo-y", &val );
    p_sys->posy = val.i_int;

    var_Create( p_this, "logo-delay", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
    var_Get( p_this, "logo-delay", &val );
    p_logo_list->i_delay = __MAX( __MIN( val.i_int, 60000 ), 0 );

    var_Create( p_this, "logo-repeat", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
    var_Get( p_this, "logo-repeat", &val );
    p_logo_list->i_repeat = val.i_int;

    var_Create(p_this, "logo-transparency", VLC_VAR_INTEGER|VLC_VAR_DOINHERIT);
    var_Get( p_this, "logo-transparency", &val );
    p_logo_list->i_alpha = __MAX( __MIN( val.i_int, 255 ), 0 );

    LoadLogoList( p_vout, p_logo_list );

    return VLC_SUCCESS;
}

/*****************************************************************************
 * Init: initialize logo video thread output method
 *****************************************************************************/
static int Init( vout_thread_t *p_vout )
{
    vout_sys_t *p_sys = p_vout->p_sys;
    picture_t *p_pic;
    int i_index;
    video_format_t fmt = {0};

    logo_list_t *p_logo_list = p_sys->p_logo_list;

    I_OUTPUTPICTURES = 0;

    /* adjust index to the next logo */
    p_logo_list->i_counter =
                        ( p_logo_list->i_counter + 1 )%p_logo_list->i_count;

    p_pic = p_logo_list->p_logo[p_logo_list->i_counter].p_pic;
    /* Initialize the output structure */
    p_vout->output.i_chroma = p_vout->render.i_chroma;
    p_vout->output.i_width  = p_vout->render.i_width;
    p_vout->output.i_height = p_vout->render.i_height;
    p_vout->output.i_aspect = p_vout->render.i_aspect;
    p_vout->fmt_out = p_vout->fmt_in;
    fmt = p_vout->fmt_out;

    /* Load the video blending filter */
    p_sys->p_blend = vlc_object_create( p_vout, sizeof(filter_t) );
    vlc_object_attach( p_sys->p_blend, p_vout );
    p_sys->p_blend->fmt_out.video.i_x_offset =
        p_sys->p_blend->fmt_out.video.i_y_offset = 0;
    p_sys->p_blend->fmt_in.video.i_x_offset =
        p_sys->p_blend->fmt_in.video.i_y_offset = 0;
    p_sys->p_blend->fmt_out.video.i_aspect = p_vout->render.i_aspect;
    p_sys->p_blend->fmt_out.video.i_chroma = p_vout->output.i_chroma;
    p_sys->p_blend->fmt_in.video.i_chroma = VLC_FOURCC('Y','U','V','A');
    p_sys->p_blend->fmt_in.video.i_aspect = VOUT_ASPECT_FACTOR;
    p_sys->i_width =
        p_sys->p_blend->fmt_in.video.i_width =
            p_sys->p_blend->fmt_in.video.i_visible_width =
                p_pic ? p_pic->p[Y_PLANE].i_visible_pitch : 0;
    p_sys->i_height =
        p_sys->p_blend->fmt_in.video.i_height =
            p_sys->p_blend->fmt_in.video.i_visible_height =
                p_pic ? p_pic->p[Y_PLANE].i_visible_lines : 0;
    p_sys->p_blend->fmt_out.video.i_width =
        p_sys->p_blend->fmt_out.video.i_visible_width =
           p_vout->output.i_width;
    p_sys->p_blend->fmt_out.video.i_height =
        p_sys->p_blend->fmt_out.video.i_visible_height =
            p_vout->output.i_height;

    p_sys->p_blend->p_module =
        module_Need( p_sys->p_blend, "video blending", 0, 0 );
    if( !p_sys->p_blend->p_module )
    {
        msg_Err( p_vout, "can't open blending filter, aborting" );
        vlc_object_detach( p_sys->p_blend );
        vlc_object_destroy( p_sys->p_blend );
        return VLC_EGENERIC;
    }

    if( p_sys->posx < 0 || p_sys->posy < 0 )
    {
        p_sys->posx = 0; p_sys->posy = 0;

        if( p_sys->pos & SUBPICTURE_ALIGN_BOTTOM )
        {
            p_sys->posy = p_vout->render.i_height - p_sys->i_height;
        }
        else if ( !(p_sys->pos & SUBPICTURE_ALIGN_TOP) )
        {
            p_sys->posy = p_vout->render.i_height / 2 - p_sys->i_height / 2;
        }

        if( p_sys->pos & SUBPICTURE_ALIGN_RIGHT )
        {
            p_sys->posx = p_vout->render.i_width - p_sys->i_width;
        }
        else if ( !(p_sys->pos & SUBPICTURE_ALIGN_LEFT) )
        {
            p_sys->posx = p_vout->render.i_width / 2 - p_sys->i_width / 2;
        }
    }

    /* Try to open the real video output */
    msg_Dbg( p_vout, "spawning the real video output" );

    p_sys->p_vout = vout_Create( p_vout, &fmt );

    /* Everything failed */
    if( p_sys->p_vout == NULL )
    {
        msg_Err( p_vout, "can't open vout, aborting" );
        return VLC_EGENERIC;
    }

    var_AddCallback( p_sys->p_vout, "mouse-x", MouseEvent, p_vout);
    var_AddCallback( p_sys->p_vout, "mouse-y", MouseEvent, p_vout);

    ALLOCATE_DIRECTBUFFERS( VOUT_MAX_PICTURES );
    ADD_CALLBACKS( p_sys->p_vout, SendEvents );
    ADD_PARENT_CALLBACKS( SendEventsToChild );

    return VLC_SUCCESS;
}

/*****************************************************************************
 * End: terminate logo video thread output method
 *****************************************************************************/
static void End( vout_thread_t *p_vout )
{
    vout_sys_t *p_sys = p_vout->p_sys;
    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 );
    }

    var_DelCallback( p_sys->p_vout, "mouse-x", MouseEvent, p_vout);
    var_DelCallback( p_sys->p_vout, "mouse-y", MouseEvent, p_vout);

    if( p_sys->p_vout )
    {
        DEL_CALLBACKS( p_sys->p_vout, SendEvents );
        vlc_object_detach( p_sys->p_vout );
        vout_Destroy( p_sys->p_vout );
    }

    if( p_sys->p_blend->p_module )
        module_Unneed( p_sys->p_blend, p_sys->p_blend->p_module );
    vlc_object_detach( p_sys->p_blend );
    vlc_object_destroy( p_sys->p_blend );
}

/*****************************************************************************
 * Destroy: destroy logo video thread output method
 *****************************************************************************/
static void Destroy( vlc_object_t *p_this )
{
    vout_thread_t *p_vout = (vout_thread_t *)p_this;
    vout_sys_t *p_sys = p_vout->p_sys;

    DEL_PARENT_CALLBACKS( SendEventsToChild );

    FreeLogoList( p_sys->p_logo_list );
    free( p_sys->p_logo_list );

    free( p_sys );
}

/*****************************************************************************
 * Render: render the logo onto the video
 *****************************************************************************/
static void Render( vout_thread_t *p_vout, picture_t *p_inpic )
{
    vout_sys_t *p_sys = p_vout->p_sys;
    picture_t *p_outpic;
    picture_t *p_pic;
    logo_list_t *p_logo_list;
    logo_t * p_logo;

    p_logo_list = p_sys->p_logo_list;

    if( p_logo_list->i_next_pic < p_inpic->date )
    {
        /* It's time to use a new logo */
        p_logo_list->i_counter =
                        ( p_logo_list->i_counter + 1 )%p_logo_list->i_count;
        p_logo = &p_logo_list->p_logo[p_sys->p_logo_list->i_counter];
        p_pic = p_logo->p_pic;
        p_logo_list->i_next_pic = p_inpic->date + ( p_logo->i_delay != -1 ?
                              p_logo->i_delay : p_logo_list->i_delay ) * 1000;
        if( p_pic )
        {

            p_sys->i_width =
                p_sys->p_blend->fmt_in.video.i_width =
                    p_sys->p_blend->fmt_in.video.i_visible_width =
                        p_pic->p[Y_PLANE].i_visible_pitch;
            p_sys->i_height =
                p_sys->p_blend->fmt_in.video.i_height =
                    p_sys->p_blend->fmt_in.video.i_visible_height =
                        p_pic->p[Y_PLANE].i_visible_lines;

            /* Just in case the new image would overflow the vout */
            if( (unsigned int)(p_sys->posy + p_sys->i_height)
                                                > p_vout->render.i_height
             || (unsigned int)(p_sys->posx + p_sys->i_width)
                                                > p_vout->render.i_width
             || p_sys->pos )
            {
                if( p_sys->pos & SUBPICTURE_ALIGN_BOTTOM )
                {
                    p_sys->posy = p_vout->render.i_height - p_sys->i_height;
                }
                else if ( !(p_sys->pos & SUBPICTURE_ALIGN_TOP) )
                {
                    p_sys->posy = p_vout->render.i_height/2 - p_sys->i_height/2;
                }

                if( p_sys->pos & SUBPICTURE_ALIGN_RIGHT )
                {
                    p_sys->posx = p_vout->render.i_width - p_sys->i_width;
                }
                else if ( !(p_sys->pos & SUBPICTURE_ALIGN_LEFT) )
                {
                    p_sys->posx = p_vout->render.i_width/2 - p_sys->i_width/2;
                }
            }
        }

    }
    else
    {
        p_logo = &p_logo_list->p_logo[p_sys->p_logo_list->i_counter];
        p_pic = p_logo->p_pic;
    }

    /* This is a new frame. Get a structure from the video_output. */
    while( !(p_outpic = vout_CreatePicture( p_sys->p_vout, 0, 0, 0 )) )
    {
        if( p_vout->b_die || p_vout->b_error ) return;
        msleep( VOUT_OUTMEM_SLEEP );
    }

    vout_CopyPicture( p_vout, p_outpic, p_inpic );
    vout_DatePicture( p_sys->p_vout, p_outpic, p_inpic->date );

    if( p_pic )
    p_sys->p_blend->pf_video_blend( p_sys->p_blend, p_outpic, p_outpic,
                                    p_pic, p_sys->posx, p_sys->posy,
                                    p_logo->i_alpha != -1 ? p_logo->i_alpha
                                    : p_logo_list->i_alpha );

    vout_DisplayPicture( p_sys->p_vout, p_outpic );
}

/*****************************************************************************
 * 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_data )
{
    var_Set( (vlc_object_t *)p_data, psz_var, newval );
    return VLC_SUCCESS;
}

/*****************************************************************************
 * MouseEvent: callback for mouse events
 *****************************************************************************/
static int MouseEvent( 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_data;
    vout_sys_t *p_sys = p_vout->p_sys;
    vlc_value_t valb;
    int i_delta;

    var_Get( p_vout->p_sys->p_vout, "mouse-button-down", &valb );

    i_delta = newval.i_int - oldval.i_int;

    if( (valb.i_int & 0x1) == 0 )
    {
        return VLC_SUCCESS;
    }

    if( psz_var[6] == 'x' )