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authorHendrik Leppkes <h.leppkes@gmail.com>2023-05-15 13:35:13 +0200
committerHendrik Leppkes <h.leppkes@gmail.com>2023-05-15 18:49:41 +0200
commitc9408c41e7c215a44d429b880d6660c410c2a79f (patch)
treee3603ad5b6ee8cd631a96be3486b86b49657a77a
parent84ea3afdaed1f72359d56ca6ae07bdbd5c9933c2 (diff)
downloadffmpeg-c9408c41e7c215a44d429b880d6660c410c2a79f.tar.gz
avcodec/vdpau_mpeg12: 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/vdpau_mpeg12.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/libavcodec/vdpau_mpeg12.c b/libavcodec/vdpau_mpeg12.c
index d286e7e57d..41b3fd8641 100644
--- a/libavcodec/vdpau_mpeg12.c
+++ b/libavcodec/vdpau_mpeg12.c
@@ -73,8 +73,9 @@ static int vdpau_mpeg_start_frame(AVCodecContext *avctx,
info->f_code[1][0] = s->mpeg_f_code[1][0];
info->f_code[1][1] = s->mpeg_f_code[1][1];
for (i = 0; i < 64; ++i) {
- info->intra_quantizer_matrix[i] = s->intra_matrix[i];
- info->non_intra_quantizer_matrix[i] = s->inter_matrix[i];
+ int n = s->idsp.idct_permutation[i];
+ info->intra_quantizer_matrix[i] = s->intra_matrix[n];
+ info->non_intra_quantizer_matrix[i] = s->inter_matrix[n];
}
return ff_vdpau_common_start_frame(pic_ctx, buffer, size);