avcodec/h264_slice: Check PPS more extensively when its not copied
Fixes Ticket5371 Fixes null pointer dereference Signed-off-by: Michael Niedermayer <michael@niedermayer.cc> (cherry picked from commit c50be7a52bc1e8e18a0059e489743ec12a43f257) Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
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@ -1282,9 +1282,13 @@ int ff_h264_decode_slice_header(H264Context *h, H264SliceContext *sl)
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if (first_slice) {
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h->pps = *h->pps_buffers[pps_id];
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} else if (h->setup_finished && h->dequant_coeff_pps != pps_id) {
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av_log(h->avctx, AV_LOG_ERROR, "PPS changed between slices\n");
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return AVERROR_INVALIDDATA;
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} else {
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if (h->pps.sps_id != pps->sps_id ||
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h->pps.transform_8x8_mode != pps->transform_8x8_mode ||
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(h->setup_finished && h->dequant_coeff_pps != pps_id)) {
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av_log(h->avctx, AV_LOG_ERROR, "PPS changed between slices\n");
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return AVERROR_INVALIDDATA;
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}
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}
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if (pps->sps_id != h->sps.sps_id ||
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