[FFmpeg-devel] [PATCH v2] [v2] lavf: vvc_probe: fix based on review feedback

[xiongweixiao <xiongweixiaoxxw@gmail.com>]

Changes since v1:
- Added a flag to force sps, pps, iraq to appear in order;
- Modified score where pps, iraq appeared in the wrong position;
- Set a smaller score for incomplete sps, pps, iraq to deal with situations that may look like vvc format

Signed-off-by: xiongweixiao <xiongweixiaoxxw@gmail.com>
---
 libavformat/vvcdec.c | 19 ++++++++++++++++---
 1 file changed, 16 insertions(+), 3 deletions(-)

diff --git a/libavformat/vvcdec.c b/libavformat/vvcdec.c
index 573b352f41..1d7be17258 100644
--- a/libavformat/vvcdec.c
+++ b/libavformat/vvcdec.c
@@ -44,6 +44,7 @@ static int vvc_probe(const AVProbeData *p)
 {
     uint32_t code = -1;
     int sps = 0, pps = 0, irap = 0;
+    int valid_pps = 0, valid_irap = 0;
     int i;
 
     for (i = 0; i < p->buf_size - 1; i++) {
@@ -60,17 +61,29 @@ static int vvc_probe(const AVProbeData *p)
 
             switch (type) {
             case VVC_SPS_NUT:       sps++;  break;
-            case VVC_PPS_NUT:       if (sps) pps++;  break;
+            case VVC_PPS_NUT:
+                pps++;
+                if (sps) 
+                    valid_pps++;
+                break;
             case VVC_IDR_N_LP:
             case VVC_IDR_W_RADL:
             case VVC_CRA_NUT:
-            case VVC_GDR_NUT:       if (pps) irap++; break;
+            case VVC_GDR_NUT:
+                irap++;
+                if (valid_pps) 
+                    valid_irap++;
+                break;
             }
         }
     }
 
-    if (sps && pps && irap)
+    if (valid_irap) 
         return AVPROBE_SCORE_EXTENSION + 1; // 1 more than .mpg
+    if (sps && pps && irap)     
+        return AVPROBE_SCORE_EXTENSION / 2; 
+    if (sps || pps || irap) 
+        return AVPROBE_SCORE_EXTENSION / 4;
     return 0;
 }
 
-- 
2.34.1

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