avcodec/hevc_ps: fix range of num_tile_{columns,rows}_minus1

From 7.4.3.3.1:

num_tile_columns_minus1 shall be in the range of 0 to PicWidthInCtbsY - 1, inclusive.
num_tile_rows_minus1 shall be in the range of 0 to PicHeightInCtbsY - 1, inclusive.

Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: James Almer <jamrial@gmail.com>

diff --git a/libavcodec/hevc_ps.c b/libavcodec/hevc_ps.c
index f6e80e16098114a7d96c7054dd4cbc19026643e8..abf08b919b28cb89b12d96c4f56aa7e375742338 100644 (file)
--- a/libavcodec/hevc_ps.c
+++ b/libavcodec/hevc_ps.c
@@ -1588,14 +1588,14 @@ int ff_hevc_decode_nal_pps(GetBitContext *gb, AVCodecContext *avctx,
         int num_tile_rows_minus1    = get_ue_golomb(gb);
 
         if (num_tile_columns_minus1 < 0 ||
-            num_tile_columns_minus1 >= sps->ctb_width - 1) {
+            num_tile_columns_minus1 >= sps->ctb_width) {
             av_log(avctx, AV_LOG_ERROR, "num_tile_columns_minus1 out of range: %d\n",
                    num_tile_columns_minus1);
             ret = num_tile_columns_minus1 < 0 ? num_tile_columns_minus1 : AVERROR_INVALIDDATA;
             goto err;
         }
         if (num_tile_rows_minus1 < 0 ||
-            num_tile_rows_minus1 >= sps->ctb_height - 1) {
+            num_tile_rows_minus1 >= sps->ctb_height) {
             av_log(avctx, AV_LOG_ERROR, "num_tile_rows_minus1 out of range: %d\n",
                    num_tile_rows_minus1);
             ret = num_tile_rows_minus1 < 0 ? num_tile_rows_minus1 : AVERROR_INVALIDDATA;