[FFmpeg-devel] [PATCH] avcodec/cbs_av1: fix parsing delta_frame_id_minus1

[James Almer]

delta_frame_id_minus1 is not a single value in the bitstream, and can
store values up to 17 bits wide.

Fixes parsing files with frame ids.

Signed-off-by: James Almer <jamrial at gmail.com>
---
See https://code.videolan.org/videolan/dav1d/uploads/a23d47dda3011a8e39ab1ac7c508b220/input.ivf

 libavcodec/cbs_av1.h                 | 2 +-
 libavcodec/cbs_av1_syntax_template.c | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/libavcodec/cbs_av1.h b/libavcodec/cbs_av1.h
index 84622ed189..71ceff9427 100644
--- a/libavcodec/cbs_av1.h
+++ b/libavcodec/cbs_av1.h
@@ -170,7 +170,7 @@ typedef struct AV1RawFrameHeader {
     uint8_t last_frame_idx;
     uint8_t golden_frame_idx;
     int8_t  ref_frame_idx[AV1_REFS_PER_FRAME];
-    uint8_t delta_frame_id_minus1;
+    uint32_t delta_frame_id_minus1[AV1_REFS_PER_FRAME];
 
     uint8_t allow_high_precision_mv;
     uint8_t is_filter_switchable;
diff --git a/libavcodec/cbs_av1_syntax_template.c b/libavcodec/cbs_av1_syntax_template.c
index 0da79b615d..48f4fab514 100644
--- a/libavcodec/cbs_av1_syntax_template.c
+++ b/libavcodec/cbs_av1_syntax_template.c
@@ -1323,8 +1323,8 @@ static int FUNC(uncompressed_header)(CodedBitstreamContext *ctx, RWContext *rw,
             if (!current->frame_refs_short_signaling)
                 fbs(3, ref_frame_idx[i], 1, i);
             if (seq->frame_id_numbers_present_flag) {
-                fb(seq->delta_frame_id_length_minus_2 + 2,
-                   delta_frame_id_minus1);
+                fbs(seq->delta_frame_id_length_minus_2 + 2,
+                    delta_frame_id_minus1[i], 1, i);
             }
         }
 
-- 
2.20.1