intrax8: Use the generic horizband function

This is assuming that intrax8 has no support for interlacing
Carry over lowdelay value in ff_intrax8_decode_picture.

libavcodec/intrax8.c

@@ -29,6 +29,7 @@
 #include "intrax8huf.h"
 #include "intrax8.h"
 #include "intrax8dsp.h"
+#include "mpegutils.h"
 
 #define MAX_TABLE_DEPTH(table_bits, max_bits) \
     ((max_bits + table_bits - 1) / table_bits)
@@ -772,7 +773,8 @@ av_cold void ff_intrax8_common_end(IntraX8Context *w)
 
 int ff_intrax8_decode_picture(IntraX8Context *const w, Picture *pict,
                               GetBitContext *gb, int *mb_x, int *mb_y,
-                              int dquant, int quant_offset, int loopfilter)
+                              int dquant, int quant_offset,
+                              int loopfilter, int lowdelay)
 {
     MpegEncContext *const s = w->s;
     int mb_xy;
@@ -834,7 +836,9 @@ int ff_intrax8_decode_picture(IntraX8Context *const w, Picture *pict,
             w->dest[0] += 8;
         }
         if (w->mb_y & 1)
-            ff_mpeg_draw_horiz_band(s, (w->mb_y - 1) * 8, 16);
+            ff_draw_horiz_band(w->avctx, w->frame, w->frame,
+                               (w->mb_y - 1) * 8, 16,
+                               PICT_FRAME, 0, lowdelay);
     }
 
 error:

libavcodec/intrax8.h

@@ -109,6 +109,7 @@ void ff_intrax8_common_end(IntraX8Context *w);
  */
 int ff_intrax8_decode_picture(IntraX8Context *w, Picture *pict,
                               GetBitContext *gb, int *mb_x, int *mb_y,
-                              int quant, int halfpq, int loopfilter);
+                              int quant, int halfpq,
+                              int loopfilter, int lowdelay);
 
 #endif /* AVCODEC_INTRAX8_H */

libavcodec/vc1_block.c

@@ -3025,7 +3025,7 @@ void ff_vc1_decode_blocks(VC1Context *v)
         ff_intrax8_decode_picture(&v->x8, &v->s.current_picture,
                                   &v->s.gb, &v->s.mb_x, &v->s.mb_y,
                                   2 * v->pq + v->halfpq, v->pq * !v->pquantizer,
-                                  v->s.loop_filter);
+                                  v->s.loop_filter, v->s.low_delay);
 
         ff_er_add_slice(&v->s.er, 0, 0,
                         (v->s.mb_x >> 1) - 1, (v->s.mb_y >> 1) - 1,

libavcodec/wmv2dec.c

@@ -231,7 +231,7 @@ int ff_wmv2_decode_secondary_picture_header(MpegEncContext *s)
         ff_intrax8_decode_picture(&w->x8, &s->current_picture,
                                   &s->gb, &s->mb_x, &s->mb_y,
                                   2 * s->qscale, (s->qscale - 1) | 1,
-                                  s->loop_filter);
+                                  s->loop_filter, s->low_delay);
 
         ff_er_add_slice(&w->s.er, 0, 0,
                         (w->s.mb_x >> 1) - 1, (w->s.mb_y >> 1) - 1,