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avcodec/d3d12va_encode: fix l0 reference count limit

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Prevents potential null pointer dereference when querying
MaxL1ReferencesForB from codec-specific support structures
during GOP structure initialization.

Signed-off-by: Tong Wu <wutong1208@outlook.com>
This commit is contained in:
Araz Iusubov
2025-06-04 10:36:34 +02:00
committed by Tong Wu
parent be46370941
commit 49e52ca24f
1 changed files with 4 additions and 2 deletions
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6
libavcodec/d3d12va_encode.c
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@ -1088,13 +1088,15 @@ static int d3d12va_encode_init_gop_structure(AVCodecContext *avctx)
switch (ctx->codec->d3d12_codec) {
case D3D12_VIDEO_ENCODER_CODEC_H264:
ref_l0 = FFMIN(support.PictureSupport.pH264Support->MaxL0ReferencesForP,
support.PictureSupport.pH264Support->MaxL1ReferencesForB);
support.PictureSupport.pH264Support->MaxL1ReferencesForB ?
support.PictureSupport.pH264Support->MaxL1ReferencesForB : UINT_MAX);
ref_l1 = support.PictureSupport.pH264Support->MaxL1ReferencesForB;
break;
case D3D12_VIDEO_ENCODER_CODEC_HEVC:
ref_l0 = FFMIN(support.PictureSupport.pHEVCSupport->MaxL0ReferencesForP,
support.PictureSupport.pHEVCSupport->MaxL1ReferencesForB);
support.PictureSupport.pHEVCSupport->MaxL1ReferencesForB ?
support.PictureSupport.pHEVCSupport->MaxL1ReferencesForB : UINT_MAX);
ref_l1 = support.PictureSupport.pHEVCSupport->MaxL1ReferencesForB;
break;