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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 18:48:57 +0200
commit865eca9321d67b358b9ff62361891aebbcaccd5c (patch)
tree21f823c38a8388406df32ebd9ec4971ca110db36
parentd811434b5d731c0fad2eb5fbf3fc3e53df98ae67 (diff)
downloadffmpeg-865eca9321d67b358b9ff62361891aebbcaccd5c.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;