shithub: libvpx

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Fix segmentation fault when num tile cols change in row-mt.

Change-Id: Ifc165d76a71fcdb7c19c158c940a8d273be0d95f

--- a/vp9/decoder/vp9_decodeframe.c

+++ b/vp9/decoder/vp9_decodeframe.c

@@ -2768,6 +2768,7 @@

     int num_sbs = 1;

     const int aligned_rows = mi_cols_aligned_to_sb(cm->mi_rows);

     const int sb_rows = aligned_rows >> MI_BLOCK_SIZE_LOG2;

+    const int num_jobs = sb_rows << cm->log2_tile_cols;

     if (pbi->row_mt_worker_data == NULL) {

       CHECK_MEM_ERROR(cm, pbi->row_mt_worker_data,

@@ -2784,10 +2785,11 @@

       num_sbs = sb_cols * sb_rows;

     }

-    if (num_sbs > pbi->row_mt_worker_data->num_sbs) {

+    if (num_sbs > pbi->row_mt_worker_data->num_sbs ||

+        num_jobs > pbi->row_mt_worker_data->num_jobs) {

       vp9_dec_free_row_mt_mem(pbi->row_mt_worker_data);

       vp9_dec_alloc_row_mt_mem(pbi->row_mt_worker_data, cm, num_sbs,

-                               pbi->max_threads, sb_rows << cm->log2_tile_cols);

+                               pbi->max_threads, num_jobs);

     }

     vp9_jobq_alloc(pbi);

   }