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avcodec/vdpau_mpeg12: fix order of quant matrix coefficients

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The matrix coefficients are stored permutated for the IDCT,
rather then in plain raster order, and need to be un-permutated
for the hardware.
This commit is contained in:
Hendrik Leppkes 2023-05-15 13:35:13 +02:00
parent 410ccbbe8c
commit 74d424470c
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GPG Key ID: 846079A4B0A7C1B5
1 changed files with 3 additions and 2 deletions
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libavcodec/vdpau_mpeg12.c
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@ -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);