Enable error resilience in WMV3/VC-1 decoder

Originally committed as revision 10502 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/vc1.c

@@ -3438,7 +3438,6 @@ static void vc1_decode_i_blocks(VC1Context *v)
     s->mb_x = s->mb_y = 0;
     s->mb_intra = 1;
     s->first_slice_line = 1;
-    ff_er_add_slice(s, 0, 0, s->mb_width - 1, s->mb_height - 1, (AC_END|DC_END|MV_END));
     for(s->mb_y = 0; s->mb_y < s->mb_height; s->mb_y++) {
         for(s->mb_x = 0; s->mb_x < s->mb_width; s->mb_x++) {
             ff_init_block_index(s);
@@ -3498,6 +3497,7 @@ static void vc1_decode_i_blocks(VC1Context *v)
             }
 
             if(get_bits_count(&s->gb) > v->bits) {
+                ff_er_add_slice(s, 0, 0, s->mb_x, s->mb_y, (AC_END|DC_END|MV_END));
                 av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i\n", get_bits_count(&s->gb), v->bits);
                 return;
             }
@@ -3505,6 +3505,7 @@ static void vc1_decode_i_blocks(VC1Context *v)
         ff_draw_horiz_band(s, s->mb_y * 16, 16);
         s->first_slice_line = 0;
     }
+    ff_er_add_slice(s, 0, 0, s->mb_width - 1, s->mb_height - 1, (AC_END|DC_END|MV_END));
 }
 
 /** Decode blocks of I-frame for advanced profile
@@ -3550,7 +3551,6 @@ static void vc1_decode_i_blocks_adv(VC1Context *v)
     s->mb_x = s->mb_y = 0;
     s->mb_intra = 1;
     s->first_slice_line = 1;
-    ff_er_add_slice(s, 0, 0, s->mb_width - 1, s->mb_height - 1, (AC_END|DC_END|MV_END));
     for(s->mb_y = 0; s->mb_y < s->mb_height; s->mb_y++) {
         for(s->mb_x = 0; s->mb_x < s->mb_width; s->mb_x++) {
             ff_init_block_index(s);
@@ -3627,6 +3627,7 @@ static void vc1_decode_i_blocks_adv(VC1Context *v)
             }
 
             if(get_bits_count(&s->gb) > v->bits) {
+                ff_er_add_slice(s, 0, 0, s->mb_x, s->mb_y, (AC_END|DC_END|MV_END));
                 av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i\n", get_bits_count(&s->gb), v->bits);
                 return;
             }
@@ -3634,6 +3635,7 @@ static void vc1_decode_i_blocks_adv(VC1Context *v)
         ff_draw_horiz_band(s, s->mb_y * 16, 16);
         s->first_slice_line = 0;
     }
+    ff_er_add_slice(s, 0, 0, s->mb_width - 1, s->mb_height - 1, (AC_END|DC_END|MV_END));
 }
 
 static void vc1_decode_p_blocks(VC1Context *v)
@@ -3665,7 +3667,6 @@ static void vc1_decode_p_blocks(VC1Context *v)
         break;
     }
 
-    ff_er_add_slice(s, 0, 0, s->mb_width - 1, s->mb_height - 1, (AC_END|DC_END|MV_END));
     s->first_slice_line = 1;
     for(s->mb_y = 0; s->mb_y < s->mb_height; s->mb_y++) {
         for(s->mb_x = 0; s->mb_x < s->mb_width; s->mb_x++) {
@@ -3675,6 +3676,7 @@ static void vc1_decode_p_blocks(VC1Context *v)
 
             vc1_decode_p_mb(v);
             if(get_bits_count(&s->gb) > v->bits || get_bits_count(&s->gb) < 0) {
+                ff_er_add_slice(s, 0, 0, s->mb_x, s->mb_y, (AC_END|DC_END|MV_END));
                 av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i at %ix%i\n", get_bits_count(&s->gb), v->bits,s->mb_x,s->mb_y);
                 return;
             }
@@ -3682,6 +3684,7 @@ static void vc1_decode_p_blocks(VC1Context *v)
         ff_draw_horiz_band(s, s->mb_y * 16, 16);
         s->first_slice_line = 0;
     }
+    ff_er_add_slice(s, 0, 0, s->mb_width - 1, s->mb_height - 1, (AC_END|DC_END|MV_END));
 }
 
 static void vc1_decode_b_blocks(VC1Context *v)
@@ -3713,7 +3716,6 @@ static void vc1_decode_b_blocks(VC1Context *v)
         break;
     }
 
-    ff_er_add_slice(s, 0, 0, s->mb_width - 1, s->mb_height - 1, (AC_END|DC_END|MV_END));
     s->first_slice_line = 1;
     for(s->mb_y = 0; s->mb_y < s->mb_height; s->mb_y++) {
         for(s->mb_x = 0; s->mb_x < s->mb_width; s->mb_x++) {
@@ -3723,6 +3725,7 @@ static void vc1_decode_b_blocks(VC1Context *v)
 
             vc1_decode_b_mb(v);
             if(get_bits_count(&s->gb) > v->bits || get_bits_count(&s->gb) < 0) {
+                ff_er_add_slice(s, 0, 0, s->mb_x, s->mb_y, (AC_END|DC_END|MV_END));
                 av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i at %ix%i\n", get_bits_count(&s->gb), v->bits,s->mb_x,s->mb_y);
                 return;
             }
@@ -3730,6 +3733,7 @@ static void vc1_decode_b_blocks(VC1Context *v)
         ff_draw_horiz_band(s, s->mb_y * 16, 16);
         s->first_slice_line = 0;
     }
+    ff_er_add_slice(s, 0, 0, s->mb_width - 1, s->mb_height - 1, (AC_END|DC_END|MV_END));
 }
 
 static void vc1_decode_skip_blocks(VC1Context *v)
@@ -4071,6 +4075,9 @@ static int vc1_decode_frame(AVCodecContext *avctx,
         return -1;
     }
 
+    s->me.qpel_put= s->dsp.put_qpel_pixels_tab;
+    s->me.qpel_avg= s->dsp.avg_qpel_pixels_tab;
+
     ff_er_frame_start(s);
 
     v->bits = buf_size * 8;