Needed for AV1.
Patch attached
>From 81be215060a718fdc3d043847e8155ba56fcb431 Mon Sep 17 00:00:00 2001
From: Lynne <d...@lynne.ee>
Date: Fri, 2 Feb 2024 03:54:06 +0100
Subject: [PATCH 1/2] lavc/cbs_av1: fill in ref_frame_sign_bias
Needed for AV1.
---
libavcodec/cbs_av1.h | 1 +
libavcodec/cbs_av1_syntax_template.c | 10 ++++++++++
2 files changed, 11 insertions(+)
diff --git a/libavcodec/cbs_av1.h b/libavcodec/cbs_av1.h
index a5402f069d..cbb43ac810 100644
--- a/libavcodec/cbs_av1.h
+++ b/libavcodec/cbs_av1.h
@@ -198,6 +198,7 @@ typedef struct AV1RawFrameHeader {
uint8_t refresh_frame_flags;
uint8_t allow_intrabc;
uint8_t ref_order_hint[AV1_NUM_REF_FRAMES];
+ uint8_t ref_frame_sign_bias[AV1_NUM_REF_FRAMES];
uint8_t frame_refs_short_signaling;
uint8_t last_frame_idx;
uint8_t golden_frame_idx;
diff --git a/libavcodec/cbs_av1_syntax_template.c b/libavcodec/cbs_av1_syntax_template.c
index 3be1f2d30f..00e9a6d030 100644
--- a/libavcodec/cbs_av1_syntax_template.c
+++ b/libavcodec/cbs_av1_syntax_template.c
@@ -1572,6 +1572,16 @@ static int FUNC(uncompressed_header)(CodedBitstreamContext *ctx, RWContext *rw,
}
if (!frame_is_intra) {
+ for (i = 0; i < AV1_REFS_PER_FRAME; i++) {
+ if (seq->enable_order_hint) {
+ int idx = current->ref_frame_idx[i];
+ int hint = current->ref_order_hint[idx];
+ current->ref_frame_sign_bias[i] = cbs_av1_get_relative_dist(seq, hint,
+ priv->order_hint) > 0;
+ } else {
+ infer(ref_frame_sign_bias[i], 0);
+ }
+ }
// Derive reference frame sign biases.
}
--
2.43.0.381.gb435a96ce8
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