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authorHendrik Leppkes <h.leppkes@gmail.com>2023-05-15 13:33:18 +0200
committerHendrik Leppkes <h.leppkes@gmail.com>2023-05-15 18:41:30 +0200
commitd7c0991cfcd14ebb69d2f4ae93e80ff5360c6892 (patch)
treeebb374fea61da5a4bf954c64640cea44b4cbce55
parent8ea302832f5055d5d72037a52d3a04e626a44533 (diff)
downloadffmpeg-d7c0991cfcd14ebb69d2f4ae93e80ff5360c6892.tar.gz
avcodec/nvdec_mpeg4: 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_mpeg4.c5
1 files 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