+ /* Init with new parameters */
+ ScalerConfiguration cfg;
+ if( GetParameters( &cfg, p_fmti, p_fmto, p_sys->i_sws_flags ) )
+ {
+ msg_Err( p_filter, "format not supported" );
+ return VLC_EGENERIC;
+ }
+ if( p_fmti->i_width <= 0 || p_fmto->i_width <= 0 )
+ {
+ msg_Err( p_filter, "0 width not supported" );
+ return VLC_EGENERIC;
+ }
+
+ /* swscale does not like too small width */
+ p_sys->i_extend_factor = 1;
+ while( __MIN( p_fmti->i_width, p_fmto->i_width ) * p_sys->i_extend_factor < MINIMUM_WIDTH)
+ p_sys->i_extend_factor++;
+
+ const unsigned i_fmti_width = p_fmti->i_width * p_sys->i_extend_factor;
+ const unsigned i_fmto_width = p_fmto->i_width * p_sys->i_extend_factor;
+ for( int n = 0; n < (cfg.b_has_a ? 2 : 1); n++ )
+ {
+ const int i_fmti = n == 0 ? cfg.i_fmti : PIX_FMT_GRAY8;
+ const int i_fmto = n == 0 ? cfg.i_fmto : PIX_FMT_GRAY8;
+ struct SwsContext *ctx;
+
+ ctx = sws_getContext( i_fmti_width, p_fmti->i_height, i_fmti,
+ i_fmto_width, p_fmto->i_height, i_fmto,
+ cfg.i_sws_flags | p_sys->i_cpu_mask,
+ p_sys->p_src_filter, p_sys->p_dst_filter, 0 );
+ if( n == 0 )
+ p_sys->ctx = ctx;
+ else
+ p_sys->ctxA = ctx;
+ }
+ if( p_sys->ctxA )
+ {
+ p_sys->p_src_a = picture_New( VLC_FOURCC( 'G', 'R', 'E', 'Y' ), i_fmti_width, p_fmti->i_height, 0 );
+ p_sys->p_dst_a = picture_New( VLC_FOURCC( 'G', 'R', 'E', 'Y' ), i_fmto_width, p_fmto->i_height, 0 );
+ }
+ if( p_sys->i_extend_factor != 1 )
+ {
+ p_sys->p_src_e = picture_New( p_fmti->i_chroma, i_fmti_width, p_fmti->i_height, 0 );
+ p_sys->p_dst_e = picture_New( p_fmto->i_chroma, i_fmto_width, p_fmto->i_height, 0 );
+
+ memset( p_sys->p_src_e->p[0].p_pixels, 0, p_sys->p_src_e->p[0].i_pitch * p_sys->p_src_e->p[0].i_lines );
+ memset( p_sys->p_dst_e->p[0].p_pixels, 0, p_sys->p_dst_e->p[0].i_pitch * p_sys->p_dst_e->p[0].i_lines );
+ }
+
+ if( !p_sys->ctx ||
+ ( cfg.b_has_a && ( !p_sys->ctxA || !p_sys->p_src_a || !p_sys->p_dst_a ) ) ||
+ ( p_sys->i_extend_factor != 1 && ( !p_sys->p_src_e || !p_sys->p_dst_e ) ) )
+ {
+ msg_Err( p_filter, "could not init SwScaler and/or allocate memory" );
+ Clean( p_filter );
+ return VLC_EGENERIC;
+ }
+
+ p_sys->b_add_a = cfg.b_add_a;
+ p_sys->b_copy = cfg.b_copy;
+ p_sys->fmt_in = *p_fmti;
+ p_sys->fmt_out = *p_fmto;
+
+#if 0
+ msg_Dbg( p_filter, "%ix%i chroma: %4.4s -> %ix%i chroma: %4.4s extend by %d",
+ p_fmti->i_width, p_fmti->i_height, (char *)&p_fmti->i_chroma,
+ p_fmto->i_width, p_fmto->i_height, (char *)&p_fmto->i_chroma,
+ p_sys->i_extend_factor );
+#endif
+ return VLC_SUCCESS;
+}
+static void Clean( filter_t *p_filter )
+{
+ filter_sys_t *p_sys = p_filter->p_sys;
+
+ if( p_sys->p_src_e )
+ picture_Release( p_sys->p_src_e );
+ if( p_sys->p_dst_e )
+ picture_Release( p_sys->p_dst_e );
+
+ if( p_sys->p_src_a )
+ picture_Release( p_sys->p_src_a );
+ if( p_sys->p_dst_a )
+ picture_Release( p_sys->p_dst_a );
+
+ if( p_sys->ctxA )
+ sws_freeContext( p_sys->ctxA );
+
+ if( p_sys->ctx )
+ sws_freeContext( p_sys->ctx );
+
+ /* We have to set it to null has we call be called again :( */
+ p_sys->ctx = NULL;
+ p_sys->ctxA = NULL;
+ p_sys->p_src_a = NULL;
+ p_sys->p_dst_a = NULL;
+ p_sys->p_src_e = NULL;
+ p_sys->p_dst_e = NULL;
+}
+
+static void GetPixels( uint8_t *pp_pixel[3], int pi_pitch[3],
+ const picture_t *p_picture,
+ int i_plane_start, int i_plane_count )
+{
+ int n;
+ for( n = 0; n < __MIN(i_plane_count, p_picture->i_planes-i_plane_start ); n++ )
+ {
+ pp_pixel[n] = p_picture->p[i_plane_start+n].p_pixels;
+ pi_pitch[n] = p_picture->p[i_plane_start+n].i_pitch;
+ }
+ for( ; n < 3; n++ )
+ {
+ pp_pixel[n] = NULL;
+ pi_pitch[n] = 0;
+ }
+}
+
+static void ExtractA( picture_t *p_dst, const picture_t *p_src, unsigned i_width, unsigned i_height )
+{
+ plane_t *d = &p_dst->p[0];
+ const plane_t *s = &p_src->p[0];
+
+ for( unsigned y = 0; y < i_height; y++ )
+ for( unsigned x = 0; x < i_width; x++ )
+ d->p_pixels[y*d->i_pitch+x] = s->p_pixels[y*s->i_pitch+4*x+OFFSET_A];
+}
+static void InjectA( picture_t *p_dst, const picture_t *p_src, unsigned i_width, unsigned i_height )
+{
+ plane_t *d = &p_dst->p[0];
+ const plane_t *s = &p_src->p[0];
+
+ for( unsigned y = 0; y < i_height; y++ )
+ for( unsigned x = 0; x < i_width; x++ )
+ d->p_pixels[y*d->i_pitch+4*x+OFFSET_A] = s->p_pixels[y*s->i_pitch+x];
+}
+static void FillA( plane_t *d, int i_offset )
+{
+ for( int y = 0; y < d->i_visible_lines; y++ )
+ for( int x = 0; x < d->i_visible_pitch; x += d->i_pixel_pitch )
+ d->p_pixels[y*d->i_pitch+x+i_offset] = 0xff;
+}
+
+static void CopyPad( picture_t *p_dst, const picture_t *p_src )
+{
+ picture_Copy( p_dst, p_src );
+ for( int n = 0; n < p_dst->i_planes; n++ )
+ {
+ const plane_t *s = &p_src->p[n];
+ plane_t *d = &p_dst->p[n];
+
+ for( int y = 0; y < s->i_lines; y++ )