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commit 5fc56fbf96859e7113f8a377dda1a23448de0ae7 Author: Lynne <[email protected]> AuthorDate: Tue May 26 11:33:24 2026 +0900 Commit: Lynne <[email protected]> CommitDate: Tue May 26 17:47:04 2026 +0900 vulkan/ffv1_enc_rct_search: barrier before reading score_mode There was a race condition where the main invocation would race ahead and use values not yet written by other invocs. Sponsored-by: Sovereign Tech Fund --- libavcodec/vulkan/ffv1_enc_rct_search.comp.glsl | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/libavcodec/vulkan/ffv1_enc_rct_search.comp.glsl b/libavcodec/vulkan/ffv1_enc_rct_search.comp.glsl index d72c667b10..52171ab221 100644 --- a/libavcodec/vulkan/ffv1_enc_rct_search.comp.glsl +++ b/libavcodec/vulkan/ffv1_enc_rct_search.comp.glsl @@ -126,6 +126,10 @@ void coeff_search(inout SliceContext sc) } } + /* All lanes must have finished accumulating into score_mode before + * lane (0,0) inspects it for the argmin. */ + barrier(); + if (gl_LocalInvocationID.x == 0 && gl_LocalInvocationID.y == 0) { uint min_score = 0xFFFFFFFF; uint min_idx = 3; _______________________________________________ ffmpeg-cvslog mailing list -- [email protected] To unsubscribe send an email to [email protected]
