rv10 thread safety fix / rv10 ffplay fix

Originally committed as revision 3733 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/rv10.c

@@ -276,9 +276,8 @@ static int get_num(GetBitContext *gb)
 /* read RV 1.0 compatible frame header */
 static int rv10_decode_picture_header(MpegEncContext *s)
 {
-    int mb_count, pb_frame, marker, full_frame, unk;
+    int mb_count, pb_frame, marker, unk, mb_xy;
     
-    full_frame= s->avctx->slice_count==1;
 //printf("ff:%d\n", full_frame);
     marker = get_bits(&s->gb, 1);
 
@@ -321,7 +320,9 @@ static int rv10_decode_picture_header(MpegEncContext *s)
     }
     /* if multiple packets per frame are sent, the position at which
        to display the macro blocks is coded here */
-    if ((!full_frame) || show_bits(&s->gb, 12)==0) {
+
+    mb_xy= s->mb_x + s->mb_y*s->mb_width;
+    if(show_bits(&s->gb, 12)==0 || (mb_xy && mb_xy < s->mb_num)){
         s->mb_x = get_bits(&s->gb, 6);	/* mb_x */
         s->mb_y = get_bits(&s->gb, 6);	/* mb_y */
         mb_count = get_bits(&s->gb, 12);

libavformat/rm.c

@@ -791,12 +791,7 @@ static int rm_read_packet(AVFormatContext *s, AVPacket *pkt)
             }
             /* picture number */
             pic_num= get_byte(pb);
-            
-            //XXX/FIXME/HACK, demuxer should be fixed to send complete frames ...
-            if(st->codec.slice_offset==NULL) 
-                st->codec.slice_offset= (int*)av_malloc(sizeof(int));
-            st->codec.slice_count= full_frame; 
-            st->codec.slice_offset[0]= 0;
+//            av_log(NULL, AV_LOG_DEBUG, "%X %d\n", h, pic_num);
         }
         
         av_new_packet(pkt, len);