From 89e3814569dc061cd4008351ed3d87366645960e Mon Sep 17 00:00:00 2001 From: Ruijing Dong Date: Wed, 2 Nov 2022 15:35:53 -0400 Subject: [PATCH] avcodec/av1_vaapi: fixed a decoding corruption issue In av1_spec.pdf page 38/669, there is a sentence below: if ( frame_type == KEY_FRAME && show_frame ) { for ( i = 0; i < NUM_REF_FRAMES; i++) { RefValid[ i ] = 0 ...... } ...... } This shows that the condition of invalidating current DPB frames should be the coming frame_type is KEY_FRAME plus show_frame is equal to 1. Otherwise, some of the frames in sequence after KEY_FRAME still refer to the reference frames before KEY_FRAME, and if these before KEY_FRAME reference frames were invalidated, these frames could not find their reference frames, and it could cause image corruption. Mesa fix is in https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/19386 Reviewed-by: Fei Wang Signed-off-by: Ruijing Dong --- libavcodec/vaapi_av1.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavcodec/vaapi_av1.c b/libavcodec/vaapi_av1.c index 63374c31c9..d0339b2705 100644 --- a/libavcodec/vaapi_av1.c +++ b/libavcodec/vaapi_av1.c @@ -274,7 +274,7 @@ static int vaapi_av1_start_frame(AVCodecContext *avctx, }; for (int i = 0; i < AV1_NUM_REF_FRAMES; i++) { - if (pic_param.pic_info_fields.bits.frame_type == AV1_FRAME_KEY) + if (pic_param.pic_info_fields.bits.frame_type == AV1_FRAME_KEY && frame_header->show_frame) pic_param.ref_frame_map[i] = VA_INVALID_ID; else pic_param.ref_frame_map[i] = ctx->ref_tab[i].valid ?