[FFmpeg-devel] [PATCH v1] lavc/hevcdec: Put slice address checking after hwaccel decode slice

* [FFmpeg-devel] [PATCH v1] lavc/hevcdec: Put slice address checking after hwaccel decode slice
@ 2024-06-14  8:18 fei.w.wang-at-intel.com
  2024-06-17  8:05 ` Anton Khirnov
  0 siblings, 1 reply; 3+ messages in thread
From: fei.w.wang-at-intel.com @ 2024-06-14  8:18 UTC (permalink / raw)
  To: ffmpeg-devel; +Cc: fei.w.wang

From: Fei Wang <fei.w.wang@intel.com>

Slice address tab only been updated in software decode slice data.

Fixes hwaccel decoding after d725c737fe2a19091b481d4d115fd939e0a674b2.

Signed-off-by: Fei Wang <fei.w.wang@intel.com>
---
 libavcodec/hevc/hevcdec.c | 18 +++++++++---------
 1 file changed, 9 insertions(+), 9 deletions(-)

diff --git a/libavcodec/hevc/hevcdec.c b/libavcodec/hevc/hevcdec.c
index 1d2e53afc3..39beb7e4dc 100644
--- a/libavcodec/hevc/hevcdec.c
+++ b/libavcodec/hevc/hevcdec.c
@@ -2770,15 +2770,6 @@ static int decode_slice_data(HEVCContext *s, const H2645NAL *nal, GetBitContext
     const HEVCPPS *pps = s->pps;
     int ret;
 
-    if (s->sh.dependent_slice_segment_flag) {
-        int ctb_addr_ts = pps->ctb_addr_rs_to_ts[s->sh.slice_ctb_addr_rs];
-        int prev_rs = pps->ctb_addr_ts_to_rs[ctb_addr_ts - 1];
-        if (s->tab_slice_address[prev_rs] != s->sh.slice_addr) {
-            av_log(s->avctx, AV_LOG_ERROR, "Previous slice segment missing\n");
-            return AVERROR_INVALIDDATA;
-        }
-    }
-
     if (!s->sh.dependent_slice_segment_flag && s->sh.slice_type != HEVC_SLICE_I) {
         ret = ff_hevc_slice_rpl(s);
         if (ret < 0) {
@@ -2799,6 +2790,15 @@ static int decode_slice_data(HEVCContext *s, const H2645NAL *nal, GetBitContext
         return AVERROR_PATCHWELCOME;
     }
 
+    if (s->sh.dependent_slice_segment_flag) {
+        int ctb_addr_ts = pps->ctb_addr_rs_to_ts[s->sh.slice_ctb_addr_rs];
+        int prev_rs = pps->ctb_addr_ts_to_rs[ctb_addr_ts - 1];
+        if (s->tab_slice_address[prev_rs] != s->sh.slice_addr) {
+            av_log(s->avctx, AV_LOG_ERROR, "Previous slice segment missing\n");
+            return AVERROR_INVALIDDATA;
+        }
+    }
+
     s->local_ctx[0].first_qp_group = !s->sh.dependent_slice_segment_flag;
 
     if (!pps->cu_qp_delta_enabled_flag)
-- 
2.25.1

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