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authorHendrik Leppkes <h.leppkes@gmail.com>2023-05-15 12:49:21 +0200
committerHendrik Leppkes <h.leppkes@gmail.com>2023-05-15 18:43:39 +0200
commit5086261af4ddd92b68e9aa72640174e7b1b2ea3a (patch)
tree183b7df7a7e19d38ba3460b1cf23af671eba69fe
parente30302c63638b0dfc5ba4bc60146c44d4af5ce40 (diff)
downloadffmpeg-5086261af4ddd92b68e9aa72640174e7b1b2ea3a.tar.gz
avcodec/nvdec_mpeg2: fix order of quant matrix coefficients
The matrix coefficients are stored permutated for the IDCT, rather then in plain raster order, and need to be un-permutated for the hardware.
-rw-r--r--libavcodec/nvdec_mpeg12.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/libavcodec/nvdec_mpeg12.c b/libavcodec/nvdec_mpeg12.c
index 9a9030d8d3..746d720888 100644
--- a/libavcodec/nvdec_mpeg12.c
+++ b/libavcodec/nvdec_mpeg12.c
@@ -80,8 +80,9 @@ static int nvdec_mpeg12_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];
}
return 0;