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avcodec/vdpau_mpeg4: 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 13:35:42 +02:00
parent 308e4ae8e3
commit 6b2ae90411
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GPG Key ID: 846079A4B0A7C1B5
1 changed files with 3 additions and 2 deletions
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libavcodec/vdpau_mpeg4.c
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@ -74,8 +74,9 @@ static int vdpau_mpeg4_start_frame(AVCodecContext *avctx,
info->alternate_vertical_scan_flag = s->alternate_scan;
info->top_field_first = s->top_field_first;
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];
}
ff_vdpau_common_start_frame(pic_ctx, buffer, size);