int vc1_decode_sequence_header(AVCodecContext *avctx, VC1Context *v, GetBitContext *gb) { av_log(avctx, AV_LOG_DEBUG, "Header: %0X\n", show_bits(gb, 32)); v->profile = get_bits(gb, 2); if (v->profile == PROFILE_COMPLEX) { av_log(avctx, AV_LOG_WARNING, "WMV3 Complex Profile is not fully supported\n"); } if (v->profile == PROFILE_ADVANCED) { v->zz_8x4 = ff_vc1_adv_progressive_8x4_zz; v->zz_4x8 = ff_vc1_adv_progressive_4x8_zz; return decode_sequence_header_adv(v, gb); } else { v->zz_8x4 = wmv2_scantableA; v->zz_4x8 = wmv2_scantableB; v->res_y411 = get_bits1(gb); v->res_sprite = get_bits1(gb); if (v->res_y411) { av_log(avctx, AV_LOG_ERROR, "Old interlaced mode is not supported\n"); return -1; } if (v->res_sprite) { av_log(avctx, AV_LOG_ERROR, "WMVP is not fully supported\n"); } } // (fps-2)/4 (->30) v->frmrtq_postproc = get_bits(gb, 3); //common // (bitrate-32kbps)/64kbps v->bitrtq_postproc = get_bits(gb, 5); //common v->s.loop_filter = get_bits1(gb); //common if(v->s.loop_filter == 1 && v->profile == PROFILE_SIMPLE) { av_log(avctx, AV_LOG_ERROR, "LOOPFILTER shall not be enabled in Simple Profile\n"); } if(v->s.avctx->skip_loop_filter >= AVDISCARD_ALL) v->s.loop_filter = 0; v->res_x8 = get_bits1(gb); //reserved v->multires = get_bits1(gb); v->res_fasttx = get_bits1(gb); if (!v->res_fasttx) { v->vc1dsp.vc1_inv_trans_8x8 = ff_simple_idct_8; v->vc1dsp.vc1_inv_trans_8x4 = ff_simple_idct84_add; v->vc1dsp.vc1_inv_trans_4x8 = ff_simple_idct48_add; v->vc1dsp.vc1_inv_trans_4x4 = ff_simple_idct44_add; v->vc1dsp.vc1_inv_trans_8x8_dc = ff_simple_idct_add_8; v->vc1dsp.vc1_inv_trans_8x4_dc = ff_simple_idct84_add; v->vc1dsp.vc1_inv_trans_4x8_dc = ff_simple_idct48_add; v->vc1dsp.vc1_inv_trans_4x4_dc = ff_simple_idct44_add; } v->fastuvmc = get_bits1(gb); //common if (!v->profile && !v->fastuvmc) { av_log(avctx, AV_LOG_ERROR, "FASTUVMC unavailable in Simple Profile\n"); return -1; } v->extended_mv = get_bits1(gb); //common if (!v->profile && v->extended_mv) { av_log(avctx, AV_LOG_ERROR, "Extended MVs unavailable in Simple Profile\n"); return -1; } v->dquant = get_bits(gb, 2); //common v->vstransform = get_bits1(gb); //common v->res_transtab = get_bits1(gb); if (v->res_transtab) { av_log(avctx, AV_LOG_ERROR, "1 for reserved RES_TRANSTAB is forbidden\n"); return -1; } v->overlap = get_bits1(gb); //common v->s.resync_marker = get_bits1(gb); v->rangered = get_bits1(gb); if (v->rangered && v->profile == PROFILE_SIMPLE) { av_log(avctx, AV_LOG_INFO, "RANGERED should be set to 0 in Simple Profile\n"); } v->s.max_b_frames = avctx->max_b_frames = get_bits(gb, 3); //common v->quantizer_mode = get_bits(gb, 2); //common v->finterpflag = get_bits1(gb); //common if (v->res_sprite) { v->s.avctx->width = v->s.avctx->coded_width = get_bits(gb, 11); v->s.avctx->height = v->s.avctx->coded_height = get_bits(gb, 11); skip_bits(gb, 5); //frame rate v->res_x8 = get_bits1(gb); if (get_bits1(gb)) { // something to do with DC VLC selection av_log(avctx, AV_LOG_ERROR, "Unsupported sprite feature\n"); return -1; } skip_bits(gb, 3); //slice code v->res_rtm_flag = 0; } else { v->res_rtm_flag = get_bits1(gb); //reserved } if (!v->res_rtm_flag) { // av_log(avctx, AV_LOG_ERROR, // "0 for reserved RES_RTM_FLAG is forbidden\n"); av_log(avctx, AV_LOG_ERROR, "Old WMV3 version detected, some frames may be decoded incorrectly\n"); //return -1; } //TODO: figure out what they mean (always 0x402F) if(!v->res_fasttx) skip_bits(gb, 16); av_log(avctx, AV_LOG_DEBUG, "Profile %i:\nfrmrtq_postproc=%i, bitrtq_postproc=%i\n" "LoopFilter=%i, MultiRes=%i, FastUVMC=%i, Extended MV=%i\n" "Rangered=%i, VSTransform=%i, Overlap=%i, SyncMarker=%i\n" "DQuant=%i, Quantizer mode=%i, Max B frames=%i\n", v->profile, v->frmrtq_postproc, v->bitrtq_postproc, v->s.loop_filter, v->multires, v->fastuvmc, v->extended_mv, v->rangered, v->vstransform, v->overlap, v->s.resync_marker, v->dquant, v->quantizer_mode, avctx->max_b_frames ); return 0; }