logo.c

uclinux 下的vlc播放器源代码

    {
        vlc_value_t valy;
        var_Get( p_vout->p_sys->p_vout, "mouse-y", &valy );
        if( newval.i_int >= (int)p_sys->posx &&
            valy.i_int >= (int)p_sys->posy &&
            newval.i_int <= (int)(p_sys->posx + p_sys->i_width) &&
            valy.i_int <= (int)(p_sys->posy + p_sys->i_height) )
        {
            p_sys->posx = __MIN( __MAX( p_sys->posx + i_delta, 0 ),
                          p_vout->output.i_width - p_sys->i_width );
        }
    }
    else if( psz_var[6] == 'y' )
    {
        vlc_value_t valx;
        var_Get( p_vout->p_sys->p_vout, "mouse-x", &valx );
        if( valx.i_int >= (int)p_sys->posx &&
            newval.i_int >= (int)p_sys->posy &&
            valx.i_int <= (int)(p_sys->posx + p_sys->i_width) &&
            newval.i_int <= (int)(p_sys->posy + p_sys->i_height) )
        {
            p_sys->posy = __MIN( __MAX( p_sys->posy + i_delta, 0 ),
                          p_vout->output.i_height - p_sys->i_height );
        }
    }

    return VLC_SUCCESS;
}

/*****************************************************************************
 * Control: control facility for the vout (forwards to child vout)
 *****************************************************************************/
static int Control( vout_thread_t *p_vout, int i_query, va_list args )
{
    return vout_vaControl( p_vout->p_sys->p_vout, i_query, args );
}

/*****************************************************************************
 * 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;
    var_Set( p_vout->p_sys->p_vout, psz_var, newval );
    return VLC_SUCCESS;
}

/*****************************************************************************
 * filter_sys_t: logo filter descriptor
 *****************************************************************************/
struct filter_sys_t
{
    logo_list_t *p_logo_list;

    int pos, posx, posy;

    vlc_bool_t b_absolute;
    mtime_t i_last_date;

    /* On the fly control variable */
    vlc_bool_t b_need_update;
};

static subpicture_t *Filter( filter_t *, mtime_t );

/*****************************************************************************
 * CreateFilter: allocates logo video filter
 *****************************************************************************/
static int CreateFilter( vlc_object_t *p_this )
{
    filter_t *p_filter = (filter_t *)p_this;
    filter_sys_t *p_sys;
    logo_list_t *p_logo_list;

    /* Allocate structure */
    p_sys = p_filter->p_sys = malloc( sizeof( filter_sys_t ) );
    if( p_sys == NULL )
    {
        msg_Err( p_filter, "out of memory" );
        return VLC_ENOMEM;
    }
    p_logo_list = p_sys->p_logo_list = malloc( sizeof( logo_list_t ) );
    if( p_logo_list == NULL )
    {
        msg_Err( p_filter, "out of memory" );
        free( p_sys );
        return VLC_ENOMEM;
    }

    /* Hook used for callback variables */
    p_logo_list->psz_filename =
        var_CreateGetString( p_filter->p_libvlc , "logo-file" );
    if( !p_logo_list->psz_filename || !*p_logo_list->psz_filename )
    {
        msg_Err( p_this, "logo file not specified" );
        free( p_sys );
        free( p_logo_list );
        return VLC_EGENERIC;
    }

    p_sys->posx = var_CreateGetInteger( p_filter->p_libvlc , "logo-x" );
    p_sys->posy = var_CreateGetInteger( p_filter->p_libvlc , "logo-y" );
    p_sys->pos = var_CreateGetInteger( p_filter->p_libvlc , "logo-position" );
    p_logo_list->i_alpha = __MAX( __MIN( var_CreateGetInteger(
                           p_filter->p_libvlc, "logo-transparency"), 255 ), 0 );
    p_logo_list->i_delay =
                    var_CreateGetInteger( p_filter->p_libvlc , "logo-delay" );
    p_logo_list->i_repeat =
                    var_CreateGetInteger( p_filter->p_libvlc , "logo-repeat" );

    var_AddCallback( p_filter->p_libvlc, "logo-file", LogoCallback, p_sys );
    var_AddCallback( p_filter->p_libvlc, "logo-x", LogoCallback, p_sys );
    var_AddCallback( p_filter->p_libvlc, "logo-y", LogoCallback, p_sys );
    var_AddCallback( p_filter->p_libvlc, "logo-position", LogoCallback, p_sys );
    var_AddCallback( p_filter->p_libvlc, "logo-transparency", LogoCallback, p_sys );
    var_AddCallback( p_filter->p_libvlc, "logo-repeat", LogoCallback, p_sys );

    vlc_mutex_init( p_filter, &p_logo_list->lock );
    vlc_mutex_lock( &p_logo_list->lock );

    LoadLogoList( p_this, p_logo_list );

    vlc_mutex_unlock( &p_logo_list->lock );

    /* Misc init */
    p_filter->pf_sub_filter = Filter;
    p_sys->b_need_update = VLC_TRUE;

    p_sys->i_last_date = 0;

    return VLC_SUCCESS;
}

/*****************************************************************************
 * DestroyFilter: destroy logo video filter
 *****************************************************************************/
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;

    vlc_mutex_destroy( &p_sys->p_logo_list->lock );
    FreeLogoList( p_sys->p_logo_list );
    free( p_sys->p_logo_list );
    free( p_sys );

    /* Delete the logo variables from INPUT */
    var_Destroy( p_filter->p_libvlc , "logo-file" );
    var_Destroy( p_filter->p_libvlc , "logo-x" );
    var_Destroy( p_filter->p_libvlc , "logo-y" );
    var_Destroy( p_filter->p_libvlc , "logo-delay" );
    var_Destroy( p_filter->p_libvlc , "logo-repeat" );
    var_Destroy( p_filter->p_libvlc , "logo-position" );
    var_Destroy( p_filter->p_libvlc , "logo-transparency" );
}

/*****************************************************************************
 * Filter: the whole thing
 *****************************************************************************
 * This function outputs subpictures at regular time intervals.
 *****************************************************************************/
static subpicture_t *Filter( filter_t *p_filter, mtime_t date )
{
    filter_sys_t *p_sys = p_filter->p_sys;
    logo_list_t *p_logo_list = p_sys->p_logo_list;
    subpicture_t *p_spu;
    subpicture_region_t *p_region;
    video_format_t fmt;
    picture_t *p_pic;
    logo_t *p_logo;

    vlc_mutex_lock( &p_logo_list->lock );
    /* Basic test:  b_need_update occurs on a dynamic change,
                    & i_next_pic is the general timer, when to
                    look at updating the logo image */

    if( ( ( !p_sys->b_need_update ) && ( p_logo_list->i_next_pic > date ) )
        || !p_logo_list->i_repeat )
    {
        vlc_mutex_unlock( &p_logo_list->lock );
        return 0;
    }
    /* prior code tested on && p_sys->i_last_date +5000000 > date ) return 0; */

    /* adjust index to the next 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_logo_list->i_counter];
    p_pic = p_logo->p_pic;

    /* Allocate the subpicture internal data. */
    p_spu = p_filter->pf_sub_buffer_new( p_filter );
    if( !p_spu )
    {
        vlc_mutex_unlock( &p_logo_list->lock );
        return NULL;
    }

    p_spu->b_absolute = p_sys->b_absolute;
    p_spu->i_start = p_sys->i_last_date = date;
    p_spu->i_stop = 0;
    p_spu->b_ephemer = VLC_TRUE;

    p_sys->b_need_update = VLC_FALSE;
    p_logo_list->i_next_pic = date +
    ( p_logo->i_delay != -1 ? p_logo->i_delay : p_logo_list->i_delay ) * 1000;

    if( p_logo_list->i_repeat != -1
        && p_logo_list->i_counter == 0 )
    {
        p_logo_list->i_repeat--;
        if( p_logo_list->i_repeat == 0 )
        {
            vlc_mutex_unlock( &p_logo_list->lock );
            return p_spu;
        }
    }

    if( !p_pic || !p_logo->i_alpha
        || ( p_logo->i_alpha == -1 && !p_logo_list->i_alpha ) )
    {
        /* Send an empty subpicture to clear the display */
        vlc_mutex_unlock( &p_logo_list->lock );
        return p_spu;
    }

    /* Create new SPU region */
    memset( &fmt, 0, sizeof(video_format_t) );
    fmt.i_chroma = 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 = p_pic->p[Y_PLANE].i_visible_pitch;
    fmt.i_height = fmt.i_visible_height = p_pic->p[Y_PLANE].i_visible_lines;
    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 );
        vlc_mutex_unlock( &p_logo_list->lock );
        return NULL;
    }

    vout_CopyPicture( p_filter, &p_region->picture, p_pic );
    vlc_mutex_unlock( &p_logo_list->lock );

    /*  where to locate the logo: */
    if( p_sys->posx < 0 || p_sys->posy < 0 )
    {   /* set to one of the 9 relative locations */
        p_spu->i_flags = p_sys->pos;
        p_spu->i_x = 0;
        p_spu->i_y = 0;
        p_spu->b_absolute = VLC_FALSE;
    }
    else
    {   /*  set to an absolute xy, referenced to upper left corner */
        p_spu->i_flags = OSD_ALIGN_LEFT | OSD_ALIGN_TOP;
        p_spu->i_x = p_sys->posx;
        p_spu->i_y = p_sys->posy;
        p_spu->b_absolute = VLC_TRUE;
    }

    p_spu->p_region = p_region;

    p_spu->i_alpha = ( p_logo->i_alpha != -1 ?
                       p_logo->i_alpha : p_logo_list->i_alpha );

    return p_spu;
}

/*****************************************************************************
 * Callback to update params on the fly
 *****************************************************************************/
static int LogoCallback( vlc_object_t *p_this, char const *psz_var,
                         vlc_value_t oldval, vlc_value_t newval, void *p_data )
{
    filter_sys_t *p_sys = (filter_sys_t *)p_data;
    logo_list_t *p_logo_list = p_sys->p_logo_list;

    if( !strncmp( psz_var, "logo-file", 6 ) )
    {
        vlc_mutex_lock( &p_logo_list->lock );
        FreeLogoList( p_logo_list );
        p_logo_list->psz_filename = strdup( newval.psz_string );
        LoadLogoList( p_this, p_logo_list );
        vlc_mutex_unlock( &p_logo_list->lock );
        p_sys->b_need_update = VLC_TRUE;
    }
    else if ( !strncmp( psz_var, "logo-x", 6 ) )
    {
        p_sys->posx = newval.i_int;
    }
    else if ( !strncmp( psz_var, "logo-y", 6 ) )
    {
        p_sys->posy = newval.i_int;
    }
    else if ( !strncmp( psz_var, "logo-position", 12 ) )
    {
        p_sys->pos = newval.i_int;
    }
    else if ( !strncmp( psz_var, "logo-transparency", 9 ) )
    {
        vlc_mutex_lock( &p_logo_list->lock );
        p_logo_list->i_alpha = __MAX( __MIN( newval.i_int, 255 ), 0 );
        vlc_mutex_unlock( &p_logo_list->lock );
    }
    else if ( !strncmp( psz_var, "logo-repeat", 11 ) )
    {
        vlc_mutex_lock( &p_logo_list->lock );
        p_logo_list->i_repeat = newval.i_int;
        vlc_mutex_unlock( &p_logo_list->lock );
    }
    p_sys->b_need_update = VLC_TRUE;
    return VLC_SUCCESS;
}