dxva2_hevc: re-write reference frame handling
The old logic required and explicit clearing of the lists first and was prone to overflow the DXVA2 struct in some circumstances. Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
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@ -57,7 +57,7 @@ static void fill_picture_parameters(const AVCodecContext *avctx, AVDXVAContext *
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DXVA_PicParams_HEVC *pp)
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{
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const HEVCFrame *current_picture = h->ref;
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int i, j, k;
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int i, j;
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memset(pp, 0, sizeof(*pp));
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@ -155,30 +155,34 @@ static void fill_picture_parameters(const AVCodecContext *avctx, AVDXVAContext *
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pp->log2_parallel_merge_level_minus2 = h->pps->log2_parallel_merge_level - 2;
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pp->CurrPicOrderCntVal = h->poc;
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// empty the lists
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memset(&pp->RefPicList, 0xff, sizeof(pp->RefPicList));
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memset(&pp->RefPicSetStCurrBefore, 0xff, sizeof(pp->RefPicSetStCurrBefore));
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memset(&pp->RefPicSetStCurrAfter, 0xff, sizeof(pp->RefPicSetStCurrAfter));
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memset(&pp->RefPicSetLtCurr, 0xff, sizeof(pp->RefPicSetLtCurr));
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// fill RefPicList from the DPB
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for (i = 0, j = 0; i < FF_ARRAY_ELEMS(h->DPB); i++) {
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const HEVCFrame *frame = &h->DPB[i];
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if (frame != current_picture && (frame->flags & (HEVC_FRAME_FLAG_LONG_REF | HEVC_FRAME_FLAG_SHORT_REF))) {
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fill_picture_entry(&pp->RefPicList[j], ff_dxva2_get_surface_index(avctx, ctx, frame->frame), !!(frame->flags & HEVC_FRAME_FLAG_LONG_REF));
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pp->PicOrderCntValList[j] = frame->poc;
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for (i = 0, j = 0; i < FF_ARRAY_ELEMS(pp->RefPicList); i++) {
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const HEVCFrame *frame = NULL;
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while (!frame && j < FF_ARRAY_ELEMS(h->DPB)) {
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if (&h->DPB[j] != current_picture && (h->DPB[j].flags & (HEVC_FRAME_FLAG_LONG_REF | HEVC_FRAME_FLAG_SHORT_REF)))
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frame = &h->DPB[j];
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j++;
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}
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if (frame) {
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fill_picture_entry(&pp->RefPicList[i], ff_dxva2_get_surface_index(avctx, ctx, frame->frame), !!(frame->flags & HEVC_FRAME_FLAG_LONG_REF));
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pp->PicOrderCntValList[i] = frame->poc;
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} else {
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pp->RefPicList[i].bPicEntry = 0xff;
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pp->PicOrderCntValList[i] = 0;
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}
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}
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#define DO_REF_LIST(ref_idx, ref_list) { \
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const RefPicList *rpl = &h->rps[ref_idx]; \
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av_assert0(rpl->nb_refs <= FF_ARRAY_ELEMS(pp->ref_list)); \
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for (j = 0, k = 0; j < rpl->nb_refs; j++) { \
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if (rpl->ref[j]) { \
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pp->ref_list[k] = get_refpic_index(pp, ff_dxva2_get_surface_index(avctx, ctx, rpl->ref[j]->frame)); \
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k++; \
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} \
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for (i = 0, j = 0; i < FF_ARRAY_ELEMS(pp->ref_list); i++) { \
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const HEVCFrame *frame = NULL; \
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while (!frame && j < rpl->nb_refs) \
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frame = rpl->ref[j++]; \
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if (frame) \
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pp->ref_list[i] = get_refpic_index(pp, ff_dxva2_get_surface_index(avctx, ctx, frame->frame)); \
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else \
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pp->ref_list[i] = 0xff; \
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} \
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}
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