The matrix coefficients are stored permutated for the IDCT,
rather then in plain raster order, and need to be un-permutated
for the hardware.
---
libavcodec/nvdec_mpeg4.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/libavcodec/nvdec_mpeg4.c b/libavcodec/nvdec_mpeg4.c
index eac138cc38..c193f6b6e4 100644
--- a/libavcodec/nvdec_mpeg4.c
+++ b/libavcodec/nvdec_mpeg4.c
@@ -88,8 +88,9 @@ static int nvdec_mpeg4_start_frame(AVCodecContext *avctx,
const uint8_t *buffer,
};
for (i = 0; i < 64; ++i) {
- ppc->QuantMatrixIntra[i] = s->intra_matrix[i];
- ppc->QuantMatrixInter[i] = s->inter_matrix[i];
+ int n = s->idsp.idct_permutation[i];
+ ppc->QuantMatrixIntra[i] = s->intra_matrix[n];
+ ppc->QuantMatrixInter[i] = s->inter_matrix[n];
}
// We need to pass the full frame buffer and not just the slice
--
2.40.1.windows.1
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