mosaic.c

uclinux 下的vlc播放器源代码

    p_sys->i_order_length = 0;
    p_sys->ppsz_order = NULL;
    psz_order = var_CreateGetString( p_filter, "mosaic-order" );

    if( psz_order[0] != 0 )
    {
        char *psz_end = NULL;
        i_index = 0;
        do
        {
            psz_end = strchr( psz_order, ',' );
            i_index++;
            p_sys->ppsz_order = realloc( p_sys->ppsz_order,
                                         i_index * sizeof(char *) );
            p_sys->ppsz_order[i_index - 1] = strndup( psz_order,
                                           psz_end - psz_order );
            psz_order = psz_end+1;
        } while( NULL !=  psz_end );
        p_sys->i_order_length = i_index;
    }

    /* Bluescreen specific stuff */
    GET_VAR( bsu, 0x00, 0xff );
    GET_VAR( bsv, 0x00, 0xff );
    GET_VAR( bsut, 0x00, 0xff );
    GET_VAR( bsvt, 0x00, 0xff );
    p_sys->b_bs = var_CreateGetBool( p_filter, "mosaic-bs" );
    var_Destroy( p_filter, "mosaic-bs" );
    var_Create( p_libvlc, "mosaic-bs", VLC_VAR_INTEGER );
    var_SetBool( p_libvlc, "mosaic-bs", p_sys->b_bs );
    var_AddCallback( p_libvlc, "mosaic-bs", MosaicCallback, p_sys );
    if( p_sys->b_bs && p_sys->b_keep )
    {
        msg_Warn( p_filter, "mosaic-keep-picture needs to be disabled for"
                            " bluescreen to work" );
    }

    vlc_mutex_unlock( &p_sys->lock );

    return VLC_SUCCESS;
}

/*****************************************************************************
 * DestroyFilter: destroy mosaic 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;
    libvlc_t *p_libvlc = p_filter->p_libvlc;
    int i_index;

    vlc_mutex_lock( &p_sys->lock );

    if( !p_sys->b_keep )
    {
        image_HandlerDelete( p_sys->p_image );
    }

    if( p_sys->i_order_length )
    {
        for( i_index = 0; i_index < p_sys->i_order_length; i_index++ )
        {
            free( p_sys->ppsz_order[i_index] );
        }
        free( p_sys->ppsz_order );
    }

    var_Destroy( p_libvlc, "mosaic-alpha" );
    var_Destroy( p_libvlc, "mosaic-height" );
    var_Destroy( p_libvlc, "mosaic-align" );
    var_Destroy( p_libvlc, "mosaic-width" );
    var_Destroy( p_libvlc, "mosaic-xoffset" );
    var_Destroy( p_libvlc, "mosaic-yoffset" );
    var_Destroy( p_libvlc, "mosaic-borderw" );
    var_Destroy( p_libvlc, "mosaic-borderh" );
    var_Destroy( p_libvlc, "mosaic-position" );
    var_Destroy( p_libvlc, "mosaic-rows" );
    var_Destroy( p_libvlc, "mosaic-cols" );
    var_Destroy( p_libvlc, "mosaic-keep-aspect-ratio" );

    var_Destroy( p_libvlc, "mosaic-bsu" );
    var_Destroy( p_libvlc, "mosaic-bsv" );
    var_Destroy( p_libvlc, "mosaic-bsut" );
    var_Destroy( p_libvlc, "mosaic-bsvt" );
    var_Destroy( p_libvlc, "mosaic-bs" );

    if( p_sys->p_pic ) p_sys->p_pic->pf_release( p_sys->p_pic );
    vlc_mutex_unlock( &p_sys->lock );
    vlc_mutex_destroy( &p_sys->lock );
    free( p_sys );
}

/*****************************************************************************
 * MosaicReleasePicture : Hack to avoid picture duplication
 *****************************************************************************/
static void MosaicReleasePicture( picture_t *p_picture )
{
    picture_t *p_original_pic = (picture_t *)p_picture->p_sys;

    p_original_pic->pf_release( p_original_pic );
}

/*****************************************************************************
 * Filter
 *****************************************************************************/
static subpicture_t *Filter( filter_t *p_filter, mtime_t date )
{
    filter_sys_t *p_sys = p_filter->p_sys;
    bridge_t *p_bridge;

    subpicture_t *p_spu;

    int i_index, i_real_index, i_row, i_col;
    int i_greatest_real_index_used = p_sys->i_order_length - 1;

    unsigned int col_inner_width, row_inner_height;

    subpicture_region_t *p_region;
    subpicture_region_t *p_region_prev = NULL;

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

    /* Initialize subpicture */
    p_spu->i_channel = 0;
    p_spu->i_start  = date;
    p_spu->i_stop = 0;
    p_spu->b_ephemer = VLC_TRUE;
    p_spu->i_alpha = p_sys->i_alpha;
    p_spu->i_flags = p_sys->i_align;
    p_spu->b_absolute = VLC_FALSE;

    vlc_mutex_lock( &p_sys->lock );
    vlc_mutex_lock( p_sys->p_lock );

    p_bridge = GetBridge( p_filter );
    if ( p_bridge == NULL )
    {
        vlc_mutex_unlock( p_sys->p_lock );
        vlc_mutex_unlock( &p_sys->lock );
        return p_spu;
    }

    if ( p_sys->i_position == 0 ) /* use automatic positioning */
    {
        int i_numpics = p_sys->i_order_length; /* keep slots and all */
        for ( i_index = 0; i_index < p_bridge->i_es_num; i_index++ )
        {
            bridged_es_t *p_es = p_bridge->pp_es[i_index];
            if ( !p_es->b_empty )
            {
                i_numpics ++;
                if( p_sys->i_order_length && p_es->psz_id != 0 )
                {
                    /* We also want to leave slots for images given in
                     * mosaic-order that are not available in p_vout_picture */
                    int i;
                    for( i = 0; i < p_sys->i_order_length ; i++ )
                    {
                        if( !strcmp( p_sys->ppsz_order[i], p_es->psz_id ) )
                        {
                            i_numpics--;
                            break;
                        }
                    }

                }
            }
        }
        p_sys->i_rows = ((int)ceil(sqrt( (float)i_numpics )));
        p_sys->i_cols = ( i_numpics % p_sys->i_rows == 0 ?
                            i_numpics / p_sys->i_rows :
                            i_numpics / p_sys->i_rows + 1 );
    }

    col_inner_width  = ( ( p_sys->i_width - ( p_sys->i_cols - 1 )
                       * p_sys->i_borderw ) / p_sys->i_cols );
    row_inner_height = ( ( p_sys->i_height - ( p_sys->i_rows - 1 )
                       * p_sys->i_borderh ) / p_sys->i_rows );

    i_real_index = 0;

    for ( i_index = 0; i_index < p_bridge->i_es_num; i_index++ )
    {
        bridged_es_t *p_es = p_bridge->pp_es[i_index];
        video_format_t fmt_in = {0}, fmt_out = {0};
        picture_t *p_converted;

        if ( p_es->b_empty )
            continue;

        while ( p_es->p_picture != NULL
                 && p_es->p_picture->date + p_sys->i_delay < date )
        {
            if ( p_es->p_picture->p_next != NULL )
            {
                picture_t *p_next = p_es->p_picture->p_next;
                p_es->p_picture->pf_release( p_es->p_picture );
                p_es->p_picture = p_next;
            }
            else if ( p_es->p_picture->date + p_sys->i_delay + BLANK_DELAY <
                        date )
            {
                /* Display blank */
                p_es->p_picture->pf_release( p_es->p_picture );
                p_es->p_picture = NULL;
                p_es->pp_last = &p_es->p_picture;
                break;
            }
            else
            {
                msg_Dbg( p_filter, "too late picture for %s (" I64Fd ")",
                         p_es->psz_id,
                         date - p_es->p_picture->date - p_sys->i_delay );
                break;
            }
        }

        if ( p_es->p_picture == NULL )
            continue;

        if ( p_sys->i_order_length == 0 )
        {
            i_real_index++;
        }
        else
        {
            int i;
            for ( i = 0; i <= p_sys->i_order_length; i++ )
            {
                if ( i == p_sys->i_order_length ) break;
                if ( strcmp( p_es->psz_id, p_sys->ppsz_order[i] ) == 0 )
                {
                    i_real_index = i;
                    break;
                }
            }
            if ( i == p_sys->i_order_length )
                i_real_index = ++i_greatest_real_index_used;
        }
        i_row = ( i_real_index / p_sys->i_cols ) % p_sys->i_rows;
        i_col = i_real_index % p_sys->i_cols ;

        if ( !p_sys->b_keep )
        {
            /* Convert the images */
            fmt_in.i_chroma = p_es->p_picture->format.i_chroma;
            fmt_in.i_height = p_es->p_picture->format.i_height;
            fmt_in.i_width = p_es->p_picture->format.i_width;

            fmt_out.i_chroma = VLC_FOURCC('Y','U','V','A');
            fmt_out.i_width = col_inner_width;
            fmt_out.i_height = row_inner_height;

            if( p_sys->b_ar ) /* keep aspect ratio */
            {
                if( (float)fmt_out.i_width / (float)fmt_out.i_height
                      > (float)fmt_in.i_width / (float)fmt_in.i_height )
                {
                    fmt_out.i_width = ( fmt_out.i_height * fmt_in.i_width )
                                         / fmt_in.i_height;
                }
                else
                {
                    fmt_out.i_height = ( fmt_out.i_width * fmt_in.i_height )
                                        / fmt_in.i_width;
                }
             }

            fmt_out.i_visible_width = fmt_out.i_width;
            fmt_out.i_visible_height = fmt_out.i_height;

            p_converted = image_Convert( p_sys->p_image, p_es->p_picture,
                                         &fmt_in, &fmt_out );
            if( !p_converted )
            {
                msg_Warn( p_filter,
                           "image resizing and chroma conversion failed" );
                continue;
            }

            /* Bluescreen stuff */
            if( p_sys->b_bs )
            {
                int i,j;
                int i_lines = p_converted->p[ A_PLANE ].i_lines;
                int i_pitch = p_converted->p[ A_PLANE ].i_pitch;