static int nvdec_mpeg12_start_frame(AVCodecContext *avctx, const uint8_t *buffer, uint32_t size) { MpegEncContext *s = avctx->priv_data; NVDECContext *ctx = avctx->internal->hwaccel_priv_data; CUVIDPICPARAMS *pp = &ctx->pic_params; CUVIDMPEG2PICPARAMS *ppc = &pp->CodecSpecific.mpeg2; FrameDecodeData *fdd; NVDECFrame *cf; AVFrame *cur_frame = s->current_picture.f; int ret, i; ret = ff_nvdec_start_frame(avctx, cur_frame); if (ret < 0) return ret; fdd = (FrameDecodeData*)cur_frame->private_ref->data; cf = (NVDECFrame*)fdd->hwaccel_priv; *pp = (CUVIDPICPARAMS) { .PicWidthInMbs = (cur_frame->width + 15) / 16, .FrameHeightInMbs = (cur_frame->height + 15) / 16, .CurrPicIdx = cf->idx, .intra_pic_flag = s->pict_type == AV_PICTURE_TYPE_I, .ref_pic_flag = s->pict_type == AV_PICTURE_TYPE_I || s->pict_type == AV_PICTURE_TYPE_P, .CodecSpecific.mpeg2 = { .ForwardRefIdx = get_ref_idx(s->last_picture.f), .BackwardRefIdx = get_ref_idx(s->next_picture.f), .picture_coding_type = s->pict_type, .full_pel_forward_vector = s->full_pel[0], .full_pel_backward_vector = s->full_pel[1], .f_code = { { s->mpeg_f_code[0][0], s->mpeg_f_code[0][1] }, { s->mpeg_f_code[1][0], s->mpeg_f_code[1][1] } }, .intra_dc_precision = s->intra_dc_precision, .frame_pred_frame_dct = s->frame_pred_frame_dct, .concealment_motion_vectors = s->concealment_motion_vectors, .q_scale_type = s->q_scale_type, .intra_vlc_format = s->intra_vlc_format, .alternate_scan = s->alternate_scan, .top_field_first = s->top_field_first, } }; for (i = 0; i < 64; ++i) { ppc->QuantMatrixIntra[i] = s->intra_matrix[i]; ppc->QuantMatrixInter[i] = s->inter_matrix[i]; } return 0; }