fix segfault with interlaced h.264

Originally committed as revision 11113 to svn://svn.ffmpeg.org/ffmpeg/trunk
17 years ago · 0063c05c67
parent e8acf0edea
commit 0063c05c67
1 changed files with 2 additions and 2 deletions
--- a/libavcodec/mpegvideo.c
+++ b/libavcodec/mpegvideo.c
@ -229,8 +229,8 @@ int alloc_picture(MpegEncContext *s, Picture *pic, int shared){
        CHECKED_ALLOCZ(pic->mbskip_table , mb_array_size * sizeof(uint8_t)+2) //the +2 is for the slice end check
        CHECKED_ALLOCZ(pic->qscale_table , mb_array_size * sizeof(uint8_t))
-        CHECKED_ALLOCZ(pic->mb_type_base , big_mb_num    * sizeof(uint32_t))
+        CHECKED_ALLOCZ(pic->mb_type_base , (big_mb_num + s->mb_stride) * sizeof(uint32_t))
-        pic->mb_type= pic->mb_type_base + s->mb_stride+1;
+        pic->mb_type= pic->mb_type_base + 2*s->mb_stride+1;
        if(s->out_format == FMT_H264){
            for(i=0; i<2; i++){
                CHECKED_ALLOCZ(pic->motion_val_base[i], 2 * (b4_array_size+4)  * sizeof(int16_t))