osdmenu.c

uclinux 下的vlc播放器源代码

    p_filter->pf_sub_filter = Filter;

    es_format_Init( &p_filter->fmt_out, SPU_ES, VLC_FOURCC( 's','p','u',' ' ) );
    p_filter->fmt_out.i_priority = 0;

    msg_Dbg( p_filter, "successfully loaded osdmenu filter" );    
    return VLC_SUCCESS;

error:
    msg_Err( p_filter, "osdmenu filter discarded" );
    vlc_mutex_destroy( &p_filter->p_sys->lock );
    if( p_filter->p_sys->p_menu )
    {
        osd_MenuDelete( p_this, p_filter->p_sys->p_menu );
        p_filter->p_sys->p_menu = NULL;
    }
    if( p_filter->p_sys->psz_file ) free( p_filter->p_sys->psz_file );
    if( p_filter->p_sys ) free( p_filter->p_sys );
    return VLC_EGENERIC;    
}

/*****************************************************************************
 * DestroyFilter: Make a clean exit of this plugin
 *****************************************************************************/
static void DestroyFilter( vlc_object_t *p_this )
{
    filter_t     *p_filter = (filter_t*)p_this;
    filter_sys_t *p_sys = p_filter->p_sys;

    var_Destroy( p_this, OSD_CFG "file" );
    var_Destroy( p_this, OSD_CFG "x" );
    var_Destroy( p_this, OSD_CFG "y" );
    var_Destroy( p_this, OSD_CFG "position" );
    var_Destroy( p_this, OSD_CFG "timeout" );
    var_Destroy( p_this, OSD_CFG "update" );

    var_DelCallback( p_sys->p_menu, "osd-menu-update", OSDMenuUpdateEvent, p_filter );
    var_DelCallback( p_sys->p_menu, "osd-menu-visible", OSDMenuVisibleEvent, p_filter );

    osd_MenuDelete( p_filter, p_sys->p_menu );

    vlc_mutex_destroy( &p_filter->p_sys->lock );
    if( p_sys->psz_file) free( p_sys->psz_file );
    if( p_sys ) free( p_sys );

    msg_Dbg( p_filter, "osdmenu filter destroyed" );
}

/*****************************************************************************
 * OSDMenuEvent: callback for OSD Menu events
 *****************************************************************************/
static int OSDMenuVisibleEvent( vlc_object_t *p_this, char const *psz_var,
                    vlc_value_t oldval, vlc_value_t newval, void *p_data )
{
    filter_t *p_filter = (filter_t *) p_data;

    p_filter->p_sys->b_visible = VLC_TRUE;
    return VLC_SUCCESS;
}

static int OSDMenuUpdateEvent( vlc_object_t *p_this, char const *psz_var,
                    vlc_value_t oldval, vlc_value_t newval, void *p_data )
{
    filter_t *p_filter = (filter_t *) p_data;

    p_filter->p_sys->b_update = VLC_TRUE;
    p_filter->p_sys->i_end_date = (mtime_t) 0;
    return VLC_SUCCESS;
}

#if 0
/*****************************************************************************
 * create_text_region : compose a text region SPU
 *****************************************************************************/
static subpicture_region_t *create_text_region( filter_t *p_filter, subpicture_t *p_spu, 
    int i_width, int i_height, const char *psz_text )
{
    subpicture_region_t *p_region;
    video_format_t       fmt;

    /* Create new SPU region */
    memset( &fmt, 0, sizeof(video_format_t) );
    fmt.i_chroma = VLC_FOURCC( 'T','E','X','T' );
    fmt.i_aspect = VOUT_ASPECT_FACTOR;
    fmt.i_sar_num = fmt.i_sar_den = 1;
    fmt.i_width = fmt.i_visible_width = i_width;
    fmt.i_height = fmt.i_visible_height = i_height;
    fmt.i_x_offset = fmt.i_y_offset = 0;
    p_region = p_spu->pf_create_region( VLC_OBJECT(p_filter), &fmt );
    if( !p_region )
    {
        msg_Err( p_filter, "cannot allocate another SPU region" );
        return NULL;
    }
    p_region->psz_text = strdup( psz_text );
    p_region->i_x = 0; 
    p_region->i_y = 40;
#if 1
    msg_Dbg( p_filter, "SPU text region position (%d,%d) (%d,%d) [%s]", 
        p_region->i_x, p_region->i_y, 
        p_region->fmt.i_width, p_region->fmt.i_height, p_region->psz_text );
#endif
    return p_region;
}
#endif

/*****************************************************************************
 * create_picture_region : compose a picture region SPU
 *****************************************************************************/
static subpicture_region_t *create_picture_region( filter_t *p_filter, subpicture_t *p_spu,
    int i_width, int i_height, picture_t *p_pic )
{
    subpicture_region_t *p_region;
    video_format_t       fmt;

    if( !p_spu ) return NULL;

    /* Create new SPU region */
    memset( &fmt, 0, sizeof(video_format_t) );
    fmt.i_chroma = (p_pic == NULL) ? VLC_FOURCC('Y','U','V','P') : VLC_FOURCC('Y','U','V','A');
    fmt.i_aspect = VOUT_ASPECT_FACTOR;
    fmt.i_sar_num = fmt.i_sar_den = 1;
    fmt.i_width = fmt.i_visible_width = i_width;
    fmt.i_height = fmt.i_visible_height = i_height;
    fmt.i_x_offset = fmt.i_y_offset = 0;
    p_region = p_spu->pf_create_region( VLC_OBJECT(p_filter), &fmt );
    if( !p_region )
    {
        msg_Err( p_filter, "cannot allocate SPU region" );
        p_filter->pf_sub_buffer_del( p_filter, p_spu );
        return NULL;
    }
    if( !p_pic && ( fmt.i_chroma == VLC_FOURCC('Y','U','V','P') ) )
    {
        p_region->fmt.p_palette->i_entries = 0;
        p_region->fmt.i_width = p_region->fmt.i_visible_width = 0;
        p_region->fmt.i_height = p_region->fmt.i_visible_height = 0;
    }
    if( p_pic != NULL )
        vout_CopyPicture( p_filter, &p_region->picture, p_pic );

    p_region->i_x = 0;
    p_region->i_y = 0;
#if 0
    msg_Dbg( p_filter, "SPU picture region position (%d,%d) (%d,%d) [%p]",
        p_region->i_x, p_region->i_y,
        p_region->fmt.i_width, p_region->fmt.i_height, p_pic );
#endif
    return p_region;
}

/****************************************************************************
 * Filter: the whole thing
 ****************************************************************************
 * This function outputs subpictures at regular time intervals.
 ****************************************************************************/
static subpicture_t *Filter( filter_t *p_filter, mtime_t i_date )
{
    filter_sys_t *p_sys = p_filter->p_sys;
    subpicture_t *p_spu;
    subpicture_region_t *p_region;

    if( !p_sys->b_update )
            return NULL;
            
    /* Am I too early? */
    if( ( ( p_sys->i_last_date + p_sys->i_update ) > i_date ) &&
        ( p_sys->i_end_date > 0 ) )
        return NULL; /* we are too early, so wait */
    
    /* Allocate the subpicture internal data. */
    p_spu = p_filter->pf_sub_buffer_new( p_filter );
    if( !p_spu ) return NULL;
    p_spu->b_ephemer = VLC_TRUE;
    p_spu->b_fade = VLC_TRUE;    
    p_spu->b_absolute = p_sys->b_absolute;
    p_spu->i_flags = p_sys->position;

    /* Determine the duration of the subpicture */
    if( p_sys->i_end_date > 0 )
    {
        /* Display the subpicture again. */
        p_spu->i_stop = p_sys->i_end_date - i_date;
        if( ( i_date + p_sys->i_update ) >= p_sys->i_end_date )
            p_sys->b_update = VLC_FALSE;
    }
    else
    {
        /* There is a new OSD picture to display */
        p_spu->i_stop = i_date + p_sys->i_timeout;
        p_sys->i_end_date = p_spu->i_stop;
    }
    
    p_sys->i_last_date = i_date;
    p_spu->i_start = p_sys->i_last_date = i_date;

    /* Send an empty subpicture to clear the display
     * when OSD menu should be hidden and menu picture is not allocated.
     */
    if( !p_filter->p_sys->p_menu->p_state->p_pic ||
        ( p_filter->p_sys->b_visible == VLC_FALSE ) )
    {
        /* Create new spu regions and allocate an empty picture in it. */
        p_region = create_picture_region( p_filter, p_spu,
            p_filter->p_sys->p_menu->p_state->i_width,
            p_filter->p_sys->p_menu->p_state->i_height,
            NULL );

        /* proper positioning of OSD menu image */
        p_spu->i_x = p_filter->p_sys->p_menu->p_state->i_x;
        p_spu->i_y = p_filter->p_sys->p_menu->p_state->i_y;
        p_spu->p_region = p_region;
        p_spu->i_alpha = 0xFF; /* Picture is completely transparent. */
        return p_spu;
    }

    /* Create new spu regions */
    p_region = create_picture_region( p_filter, p_spu,
        p_filter->p_sys->p_menu->p_state->i_width,
        p_filter->p_sys->p_menu->p_state->i_height,
        p_filter->p_sys->p_menu->p_state->p_pic );
#if 0
    p_region->p_next = create_text_region( p_filter, p_spu,
        p_filter->p_sys->p_menu->p_state->i_width, p_filter->p_sys->p_menu->p_state->i_height,
        p_filter->p_sys->p_menu->p_state->p_visible->psz_action );
#endif

    /* proper positioning of OSD menu image */
    p_spu->i_x = p_filter->p_sys->p_menu->p_state->i_x;
    p_spu->i_y = p_filter->p_sys->p_menu->p_state->i_y;
    p_spu->p_region = p_region;
    return p_spu;
}