static av_cold int rv30_decode_init(AVCodecContext *avctx) { RV34DecContext *r = avctx->priv_data; int ret; r->rv30 = 1; if ((ret = ff_rv34_decode_init(avctx)) < 0) return ret; if(avctx->extradata_size < 2){ av_log(avctx, AV_LOG_ERROR, "Extradata is too small.\n"); return -1; } r->rpr = (avctx->extradata[1] & 7) >> 1; r->rpr = FFMIN(r->rpr + 1, 3); if(avctx->extradata_size - 8 < (r->rpr - 1) * 2){ av_log(avctx, AV_LOG_ERROR, "Insufficient extradata - need at least %d bytes, got %d\n", 6 + r->rpr * 2, avctx->extradata_size); return AVERROR(EINVAL); } r->parse_slice_header = rv30_parse_slice_header; r->decode_intra_types = rv30_decode_intra_types; r->decode_mb_info = rv30_decode_mb_info; r->loop_filter = rv30_loop_filter; r->luma_dc_quant_i = rv30_luma_dc_quant; r->luma_dc_quant_p = rv30_luma_dc_quant; return 0; }