[FFmpeg-devel] [PR] [8.0] vulkan_vp9: fix subsampling source and show_frame flag (PR #21624)

[FFmpeg-devel] [PR] [8.0] vulkan_vp9: fix subsampling source and show_frame flag (PR #21624)

[Kacper Michajłow via ffmpeg-devel]

PR #21624 opened by Kacper Michajłow (kasper93)
URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/21624
Patch URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/21624.patch

(cherry picked from commit 672635932684c0ee7cfbb7f9eef6999b4e72df4b)


From 2f547c4022786ef985992e6d534f761909afefd5 Mon Sep 17 00:00:00 2001
From: Hyunjun Ko <zzoon@igalia.com>
Date: Mon, 8 Dec 2025 16:01:45 +0100
Subject: [PATCH] vulkan_vp9: fix subsampling source and show_frame flag

(cherry picked from commit 672635932684c0ee7cfbb7f9eef6999b4e72df4b)
---
 libavcodec/vulkan_vp9.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/libavcodec/vulkan_vp9.c b/libavcodec/vulkan_vp9.c
index 7b852a29a5..0e20ef6382 100644
--- a/libavcodec/vulkan_vp9.c
+++ b/libavcodec/vulkan_vp9.c
@@ -115,6 +115,7 @@ static int vk_vp9_start_frame(AVCodecContext          *avctx,
     uint32_t frame_id_alloc_mask = 0;
 
     const VP9Frame *pic = &s->frames[CUR_FRAME];
+    const AVPixFmtDescriptor *pixdesc = av_pix_fmt_desc_get(avctx->sw_pix_fmt);
     FFVulkanDecodeContext *dec = avctx->internal->hwaccel_priv_data;
     uint8_t profile = (pic->frame_header->profile_high_bit << 1) | pic->frame_header->profile_low_bit;
 
@@ -222,8 +223,9 @@ static int vk_vp9_start_frame(AVCodecContext          *avctx,
         },
         .BitDepth = profile < 2 ? 8 :
                     pic->frame_header->ten_or_twelve_bit ? 12 : 10,
-        .subsampling_x = pic->frame_header->subsampling_x,
-        .subsampling_y = pic->frame_header->subsampling_y,
+        .subsampling_x = pixdesc->log2_chroma_w,
+        .subsampling_y = pixdesc->log2_chroma_h,
+
         .color_space = pic->frame_header->color_space,
     };
 
@@ -235,7 +237,7 @@ static int vk_vp9_start_frame(AVCodecContext          *avctx,
            .refresh_frame_context = pic->frame_header->refresh_frame_context,
            .frame_parallel_decoding_mode = pic->frame_header->frame_parallel_decoding_mode,
            .segmentation_enabled = pic->frame_header->segmentation_enabled,
-           .show_frame = pic->frame_header->segmentation_enabled,
+           .show_frame = !s->h.invisible,
            .UsePrevFrameMvs = s->h.use_last_frame_mvs,
         },
         .profile = profile,
-- 
2.52.0

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