[FFmpeg-cvslog] lavc/hevcdec: only set no_rasl_output_flag for IRAP frames

[Anton Khirnov]

ffmpeg | branch: master | Anton Khirnov <anton at khirnov.net> | Sat Jun  1 18:38:57 2024 +0200| [3115c84015d8cc86262844d9a2435d2c5423de0e] | committer: Anton Khirnov

lavc/hevcdec: only set no_rasl_output_flag for IRAP frames

Its meaning is only specified for IRAP frames.

As it's currently never used otherwise, this should not change decoder
behaviour, but will be useful in future commits.

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=3115c84015d8cc86262844d9a2435d2c5423de0e
---

 libavcodec/hevc/hevcdec.c | 4 +++-
 libavcodec/hevc/hevcdec.h | 1 +
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/libavcodec/hevc/hevcdec.c b/libavcodec/hevc/hevcdec.c
index 585a066426..d444ea93f7 100644
--- a/libavcodec/hevc/hevcdec.c
+++ b/libavcodec/hevc/hevcdec.c
@@ -2925,7 +2925,9 @@ static int hevc_frame_start(HEVCContext *s)
     s->is_decoded        = 0;
     s->first_nal_type    = s->nal_unit_type;
 
-    s->no_rasl_output_flag = IS_IDR(s) || IS_BLA(s) || (s->nal_unit_type == HEVC_NAL_CRA_NUT && s->last_eos);
+    if (IS_IRAP(s))
+        s->no_rasl_output_flag = IS_IDR(s) || IS_BLA(s) ||
+                                 (s->nal_unit_type == HEVC_NAL_CRA_NUT && s->last_eos);
 
     /* 8.3.1 */
     if (s->temporal_id == 0 &&
diff --git a/libavcodec/hevc/hevcdec.h b/libavcodec/hevc/hevcdec.h
index 5eaebd3584..fa7caf9cf7 100644
--- a/libavcodec/hevc/hevcdec.h
+++ b/libavcodec/hevc/hevcdec.h
@@ -493,6 +493,7 @@ typedef struct HEVCContext {
     int overlap;
 
     int is_decoded;
+    // NoRaslOutputFlag associated with the last IRAP frame
     int no_rasl_output_flag;
 
     HEVCPredContext hpc;