1 /*****************************************************************************
2 * set: h264 encoder (SPS and PPS init and write)
3 *****************************************************************************
4 * Copyright (C) 2003-2008 x264 project
6 * Authors: Laurent Aimar <fenrir@via.ecp.fr>
7 * Loren Merritt <lorenm@u.washington.edu>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111, USA.
22 *****************************************************************************/
26 #include "common/common.h"
32 #define bs_write_ue bs_write_ue_big
34 static void transpose( uint8_t *buf, int w )
37 for( i = 0; i < w; i++ )
38 for( j = 0; j < i; j++ )
39 XCHG( uint8_t, buf[w*i+j], buf[w*j+i] );
42 static void scaling_list_write( bs_t *s, x264_pps_t *pps, int idx )
44 const int len = idx<4 ? 16 : 64;
45 const uint8_t *zigzag = idx<4 ? x264_zigzag_scan4[0] : x264_zigzag_scan8[0];
46 const uint8_t *list = pps->scaling_list[idx];
47 const uint8_t *def_list = (idx==CQM_4IC) ? pps->scaling_list[CQM_4IY]
48 : (idx==CQM_4PC) ? pps->scaling_list[CQM_4PY]
50 if( !memcmp( list, def_list, len ) )
51 bs_write( s, 1, 0 ); // scaling_list_present_flag
52 else if( !memcmp( list, x264_cqm_jvt[idx], len ) )
54 bs_write( s, 1, 1 ); // scaling_list_present_flag
55 bs_write_se( s, -8 ); // use jvt list
60 bs_write( s, 1, 1 ); // scaling_list_present_flag
62 // try run-length compression of trailing values
63 for( run = len; run > 1; run-- )
64 if( list[zigzag[run-1]] != list[zigzag[run-2]] )
66 if( run < len && len - run < bs_size_se( (int8_t)-list[zigzag[run]] ) )
69 for( j = 0; j < run; j++ )
70 bs_write_se( s, (int8_t)(list[zigzag[j]] - (j>0 ? list[zigzag[j-1]] : 8)) ); // delta
73 bs_write_se( s, (int8_t)-list[zigzag[run]] );
77 void x264_sps_init( x264_sps_t *sps, int i_id, x264_param_t *param )
81 sps->b_qpprime_y_zero_transform_bypass = param->rc.i_rc_method == X264_RC_CQP && param->rc.i_qp_constant == 0;
82 if( sps->b_qpprime_y_zero_transform_bypass )
83 sps->i_profile_idc = PROFILE_HIGH444_PREDICTIVE;
84 else if( param->analyse.b_transform_8x8 || param->i_cqm_preset != X264_CQM_FLAT )
85 sps->i_profile_idc = PROFILE_HIGH;
86 else if( param->b_cabac || param->i_bframe > 0 )
87 sps->i_profile_idc = PROFILE_MAIN;
89 sps->i_profile_idc = PROFILE_BASELINE;
90 sps->i_level_idc = param->i_level_idc;
92 sps->b_constraint_set0 = sps->i_profile_idc == PROFILE_BASELINE;
93 /* x264 doesn't support the features that are in Baseline and not in Main,
94 * namely arbitrary_slice_order and slice_groups. */
95 sps->b_constraint_set1 = sps->i_profile_idc <= PROFILE_MAIN;
96 /* Never set constraint_set2, it is not necessary and not used in real world. */
97 sps->b_constraint_set2 = 0;
99 sps->i_log2_max_frame_num = 4; /* at least 4 */
100 while( (1 << sps->i_log2_max_frame_num) <= param->i_keyint_max )
102 sps->i_log2_max_frame_num++;
104 sps->i_log2_max_frame_num++; /* just in case */
107 if( sps->i_poc_type == 0 )
109 sps->i_log2_max_poc_lsb = sps->i_log2_max_frame_num + 1; /* max poc = 2*frame_num */
111 else if( sps->i_poc_type == 1 )
116 sps->b_delta_pic_order_always_zero = 1;
117 sps->i_offset_for_non_ref_pic = 0;
118 sps->i_offset_for_top_to_bottom_field = 0;
119 sps->i_num_ref_frames_in_poc_cycle = 0;
121 for( i = 0; i < sps->i_num_ref_frames_in_poc_cycle; i++ )
123 sps->i_offset_for_ref_frame[i] = 0;
129 sps->b_gaps_in_frame_num_value_allowed = 0;
130 sps->i_mb_width = ( param->i_width + 15 ) / 16;
131 sps->i_mb_height= ( param->i_height + 15 ) / 16;
132 if( param->b_interlaced )
133 sps->i_mb_height = ( sps->i_mb_height + 1 ) & ~1;
134 sps->b_frame_mbs_only = ! param->b_interlaced;
135 sps->b_mb_adaptive_frame_field = param->b_interlaced;
136 sps->b_direct8x8_inference = param->analyse.i_direct_8x8_inference
137 || ! sps->b_frame_mbs_only
138 || !(param->analyse.inter & X264_ANALYSE_PSUB8x8);
140 sps->crop.i_left = 0;
142 sps->crop.i_right = sps->i_mb_width*16 - param->i_width;
143 sps->crop.i_bottom = (sps->i_mb_height*16 - param->i_height) >> param->b_interlaced;
144 sps->b_crop = sps->crop.i_left || sps->crop.i_top ||
145 sps->crop.i_right || sps->crop.i_bottom;
147 sps->vui.b_aspect_ratio_info_present = 0;
148 if( param->vui.i_sar_width > 0 && param->vui.i_sar_height > 0 )
150 sps->vui.b_aspect_ratio_info_present = 1;
151 sps->vui.i_sar_width = param->vui.i_sar_width;
152 sps->vui.i_sar_height= param->vui.i_sar_height;
155 sps->vui.b_overscan_info_present = ( param->vui.i_overscan ? 1 : 0 );
156 if( sps->vui.b_overscan_info_present )
157 sps->vui.b_overscan_info = ( param->vui.i_overscan == 2 ? 1 : 0 );
159 sps->vui.b_signal_type_present = 0;
160 sps->vui.i_vidformat = ( param->vui.i_vidformat <= 5 ? param->vui.i_vidformat : 5 );
161 sps->vui.b_fullrange = ( param->vui.b_fullrange ? 1 : 0 );
162 sps->vui.b_color_description_present = 0;
164 sps->vui.i_colorprim = ( param->vui.i_colorprim <= 9 ? param->vui.i_colorprim : 2 );
165 sps->vui.i_transfer = ( param->vui.i_transfer <= 11 ? param->vui.i_transfer : 2 );
166 sps->vui.i_colmatrix = ( param->vui.i_colmatrix <= 9 ? param->vui.i_colmatrix : 2 );
167 if( sps->vui.i_colorprim != 2 ||
168 sps->vui.i_transfer != 2 ||
169 sps->vui.i_colmatrix != 2 )
171 sps->vui.b_color_description_present = 1;
174 if( sps->vui.i_vidformat != 5 ||
175 sps->vui.b_fullrange ||
176 sps->vui.b_color_description_present )
178 sps->vui.b_signal_type_present = 1;
181 /* FIXME: not sufficient for interlaced video */
182 sps->vui.b_chroma_loc_info_present = ( param->vui.i_chroma_loc ? 1 : 0 );
183 if( sps->vui.b_chroma_loc_info_present )
185 sps->vui.i_chroma_loc_top = param->vui.i_chroma_loc;
186 sps->vui.i_chroma_loc_bottom = param->vui.i_chroma_loc;
189 sps->vui.b_timing_info_present = 0;
190 if( param->i_fps_num > 0 && param->i_fps_den > 0)
192 sps->vui.b_timing_info_present = 1;
193 sps->vui.i_num_units_in_tick = param->i_fps_den;
194 sps->vui.i_time_scale = param->i_fps_num * 2;
195 sps->vui.b_fixed_frame_rate = 1;
198 sps->vui.i_num_reorder_frames = param->b_bframe_pyramid ? 2 : param->i_bframe ? 1 : 0;
199 /* extra slot with pyramid so that we don't have to override the
200 * order of forgetting old pictures */
201 sps->vui.i_max_dec_frame_buffering =
202 sps->i_num_ref_frames = X264_MIN(16, X264_MAX(param->i_frame_reference, 1 + sps->vui.i_num_reorder_frames));
204 sps->vui.b_bitstream_restriction = 1;
205 if( sps->vui.b_bitstream_restriction )
207 sps->vui.b_motion_vectors_over_pic_boundaries = 1;
208 sps->vui.i_max_bytes_per_pic_denom = 0;
209 sps->vui.i_max_bits_per_mb_denom = 0;
210 sps->vui.i_log2_max_mv_length_horizontal =
211 sps->vui.i_log2_max_mv_length_vertical = (int)(log(param->analyse.i_mv_range*4-1)/log(2)) + 1;
216 void x264_sps_write( bs_t *s, x264_sps_t *sps )
218 bs_write( s, 8, sps->i_profile_idc );
219 bs_write( s, 1, sps->b_constraint_set0 );
220 bs_write( s, 1, sps->b_constraint_set1 );
221 bs_write( s, 1, sps->b_constraint_set2 );
223 bs_write( s, 5, 0 ); /* reserved */
225 bs_write( s, 8, sps->i_level_idc );
227 bs_write_ue( s, sps->i_id );
229 if( sps->i_profile_idc >= PROFILE_HIGH )
231 bs_write_ue( s, 1 ); // chroma_format_idc = 4:2:0
232 bs_write_ue( s, 0 ); // bit_depth_luma_minus8
233 bs_write_ue( s, 0 ); // bit_depth_chroma_minus8
234 bs_write( s, 1, sps->b_qpprime_y_zero_transform_bypass );
235 bs_write( s, 1, 0 ); // seq_scaling_matrix_present_flag
238 bs_write_ue( s, sps->i_log2_max_frame_num - 4 );
239 bs_write_ue( s, sps->i_poc_type );
240 if( sps->i_poc_type == 0 )
242 bs_write_ue( s, sps->i_log2_max_poc_lsb - 4 );
244 else if( sps->i_poc_type == 1 )
248 bs_write( s, 1, sps->b_delta_pic_order_always_zero );
249 bs_write_se( s, sps->i_offset_for_non_ref_pic );
250 bs_write_se( s, sps->i_offset_for_top_to_bottom_field );
251 bs_write_ue( s, sps->i_num_ref_frames_in_poc_cycle );
253 for( i = 0; i < sps->i_num_ref_frames_in_poc_cycle; i++ )
255 bs_write_se( s, sps->i_offset_for_ref_frame[i] );
258 bs_write_ue( s, sps->i_num_ref_frames );
259 bs_write( s, 1, sps->b_gaps_in_frame_num_value_allowed );
260 bs_write_ue( s, sps->i_mb_width - 1 );
261 if (sps->b_frame_mbs_only)
263 bs_write_ue( s, sps->i_mb_height - 1);
267 bs_write_ue( s, sps->i_mb_height/2 - 1);
269 bs_write( s, 1, sps->b_frame_mbs_only );
270 if( !sps->b_frame_mbs_only )
272 bs_write( s, 1, sps->b_mb_adaptive_frame_field );
274 bs_write( s, 1, sps->b_direct8x8_inference );
276 bs_write( s, 1, sps->b_crop );
279 bs_write_ue( s, sps->crop.i_left / 2 );
280 bs_write_ue( s, sps->crop.i_right / 2 );
281 bs_write_ue( s, sps->crop.i_top / 2 );
282 bs_write_ue( s, sps->crop.i_bottom / 2 );
285 bs_write( s, 1, sps->b_vui );
288 bs_write1( s, sps->vui.b_aspect_ratio_info_present );
289 if( sps->vui.b_aspect_ratio_info_present )
292 static const struct { int w, h; int sar; } sar[] =
294 { 1, 1, 1 }, { 12, 11, 2 }, { 10, 11, 3 }, { 16, 11, 4 },
295 { 40, 33, 5 }, { 24, 11, 6 }, { 20, 11, 7 }, { 32, 11, 8 },
296 { 80, 33, 9 }, { 18, 11, 10}, { 15, 11, 11}, { 64, 33, 12},
297 { 160,99, 13}, { 0, 0, -1 }
299 for( i = 0; sar[i].sar != -1; i++ )
301 if( sar[i].w == sps->vui.i_sar_width &&
302 sar[i].h == sps->vui.i_sar_height )
305 if( sar[i].sar != -1 )
307 bs_write( s, 8, sar[i].sar );
311 bs_write( s, 8, 255); /* aspect_ratio_idc (extended) */
312 bs_write( s, 16, sps->vui.i_sar_width );
313 bs_write( s, 16, sps->vui.i_sar_height );
317 bs_write1( s, sps->vui.b_overscan_info_present );
318 if( sps->vui.b_overscan_info_present )
319 bs_write1( s, sps->vui.b_overscan_info );
321 bs_write1( s, sps->vui.b_signal_type_present );
322 if( sps->vui.b_signal_type_present )
324 bs_write( s, 3, sps->vui.i_vidformat );
325 bs_write1( s, sps->vui.b_fullrange );
326 bs_write1( s, sps->vui.b_color_description_present );
327 if( sps->vui.b_color_description_present )
329 bs_write( s, 8, sps->vui.i_colorprim );
330 bs_write( s, 8, sps->vui.i_transfer );
331 bs_write( s, 8, sps->vui.i_colmatrix );
335 bs_write1( s, sps->vui.b_chroma_loc_info_present );
336 if( sps->vui.b_chroma_loc_info_present )
338 bs_write_ue( s, sps->vui.i_chroma_loc_top );
339 bs_write_ue( s, sps->vui.i_chroma_loc_bottom );
342 bs_write1( s, sps->vui.b_timing_info_present );
343 if( sps->vui.b_timing_info_present )
345 bs_write32( s, sps->vui.i_num_units_in_tick );
346 bs_write32( s, sps->vui.i_time_scale );
347 bs_write1( s, sps->vui.b_fixed_frame_rate );
350 bs_write1( s, 0 ); /* nal_hrd_parameters_present_flag */
351 bs_write1( s, 0 ); /* vcl_hrd_parameters_present_flag */
352 bs_write1( s, 0 ); /* pic_struct_present_flag */
353 bs_write1( s, sps->vui.b_bitstream_restriction );
354 if( sps->vui.b_bitstream_restriction )
356 bs_write1( s, sps->vui.b_motion_vectors_over_pic_boundaries );
357 bs_write_ue( s, sps->vui.i_max_bytes_per_pic_denom );
358 bs_write_ue( s, sps->vui.i_max_bits_per_mb_denom );
359 bs_write_ue( s, sps->vui.i_log2_max_mv_length_horizontal );
360 bs_write_ue( s, sps->vui.i_log2_max_mv_length_vertical );
361 bs_write_ue( s, sps->vui.i_num_reorder_frames );
362 bs_write_ue( s, sps->vui.i_max_dec_frame_buffering );
366 bs_rbsp_trailing( s );
369 void x264_pps_init( x264_pps_t *pps, int i_id, x264_param_t *param, x264_sps_t *sps )
374 pps->i_sps_id = sps->i_id;
375 pps->b_cabac = param->b_cabac;
377 pps->b_pic_order = 0;
378 pps->i_num_slice_groups = 1;
380 pps->i_num_ref_idx_l0_active = 1;
381 pps->i_num_ref_idx_l1_active = 1;
383 pps->b_weighted_pred = 0;
384 pps->b_weighted_bipred = param->analyse.b_weighted_bipred ? 2 : 0;
386 pps->i_pic_init_qp = param->rc.i_rc_method == X264_RC_ABR ? 26 : param->rc.i_qp_constant;
387 pps->i_pic_init_qs = 26;
389 pps->i_chroma_qp_index_offset = param->analyse.i_chroma_qp_offset;
390 pps->b_deblocking_filter_control = 1;
391 pps->b_constrained_intra_pred = 0;
392 pps->b_redundant_pic_cnt = 0;
394 pps->b_transform_8x8_mode = param->analyse.b_transform_8x8 ? 1 : 0;
396 pps->i_cqm_preset = param->i_cqm_preset;
397 switch( pps->i_cqm_preset )
400 for( i = 0; i < 6; i++ )
401 pps->scaling_list[i] = x264_cqm_flat16;
404 for( i = 0; i < 6; i++ )
405 pps->scaling_list[i] = x264_cqm_jvt[i];
407 case X264_CQM_CUSTOM:
408 /* match the transposed DCT & zigzag */
409 transpose( param->cqm_4iy, 4 );
410 transpose( param->cqm_4ic, 4 );
411 transpose( param->cqm_4py, 4 );
412 transpose( param->cqm_4pc, 4 );
413 transpose( param->cqm_8iy, 8 );
414 transpose( param->cqm_8py, 8 );
415 pps->scaling_list[CQM_4IY] = param->cqm_4iy;
416 pps->scaling_list[CQM_4IC] = param->cqm_4ic;
417 pps->scaling_list[CQM_4PY] = param->cqm_4py;
418 pps->scaling_list[CQM_4PC] = param->cqm_4pc;
419 pps->scaling_list[CQM_8IY+4] = param->cqm_8iy;
420 pps->scaling_list[CQM_8PY+4] = param->cqm_8py;
421 for( i = 0; i < 6; i++ )
422 for( j = 0; j < (i<4?16:64); j++ )
423 if( pps->scaling_list[i][j] == 0 )
424 pps->scaling_list[i] = x264_cqm_jvt[i];
429 void x264_pps_write( bs_t *s, x264_pps_t *pps )
431 bs_write_ue( s, pps->i_id );
432 bs_write_ue( s, pps->i_sps_id );
434 bs_write( s, 1, pps->b_cabac );
435 bs_write( s, 1, pps->b_pic_order );
436 bs_write_ue( s, pps->i_num_slice_groups - 1 );
438 bs_write_ue( s, pps->i_num_ref_idx_l0_active - 1 );
439 bs_write_ue( s, pps->i_num_ref_idx_l1_active - 1 );
440 bs_write( s, 1, pps->b_weighted_pred );
441 bs_write( s, 2, pps->b_weighted_bipred );
443 bs_write_se( s, pps->i_pic_init_qp - 26 );
444 bs_write_se( s, pps->i_pic_init_qs - 26 );
445 bs_write_se( s, pps->i_chroma_qp_index_offset );
447 bs_write( s, 1, pps->b_deblocking_filter_control );
448 bs_write( s, 1, pps->b_constrained_intra_pred );
449 bs_write( s, 1, pps->b_redundant_pic_cnt );
451 if( pps->b_transform_8x8_mode || pps->i_cqm_preset != X264_CQM_FLAT )
453 bs_write( s, 1, pps->b_transform_8x8_mode );
454 bs_write( s, 1, (pps->i_cqm_preset != X264_CQM_FLAT) );
455 if( pps->i_cqm_preset != X264_CQM_FLAT )
457 scaling_list_write( s, pps, CQM_4IY );
458 scaling_list_write( s, pps, CQM_4IC );
459 bs_write( s, 1, 0 ); // Cr = Cb
460 scaling_list_write( s, pps, CQM_4PY );
461 scaling_list_write( s, pps, CQM_4PC );
462 bs_write( s, 1, 0 ); // Cr = Cb
463 if( pps->b_transform_8x8_mode )
465 scaling_list_write( s, pps, CQM_8IY+4 );
466 scaling_list_write( s, pps, CQM_8PY+4 );
469 bs_write_se( s, pps->i_chroma_qp_index_offset );
472 bs_rbsp_trailing( s );
475 void x264_sei_version_write( x264_t *h, bs_t *s )
478 // random ID number generated according to ISO-11578
479 const uint8_t uuid[16] = {
480 0xdc, 0x45, 0xe9, 0xbd, 0xe6, 0xd9, 0x48, 0xb7,
481 0x96, 0x2c, 0xd8, 0x20, 0xd9, 0x23, 0xee, 0xef
483 char *opts = x264_param2string( &h->param, 0 );
484 char *version = x264_malloc( 200 + strlen(opts) );
487 sprintf( version, "x264 - core %d%s - H.264/MPEG-4 AVC codec - "
488 "Copyleft 2003-2008 - http://www.videolan.org/x264.html - options: %s",
489 X264_BUILD, X264_VERSION, opts );
490 length = strlen(version)+1+16;
492 bs_write( s, 8, 0x5 ); // payload_type = user_data_unregistered
494 for( i = 0; i <= length-255; i += 255 )
495 bs_write( s, 8, 255 );
496 bs_write( s, 8, length-i );
498 for( i = 0; i < 16; i++ )
499 bs_write( s, 8, uuid[i] );
500 for( i = 0; i < length-16; i++ )
501 bs_write( s, 8, version[i] );
503 bs_rbsp_trailing( s );
506 x264_free( version );
509 const x264_level_t x264_levels[] =
511 { 10, 1485, 99, 152064, 64, 175, 64, 64, 0, 0, 0, 1 },
512 // {"1b", 1485, 99, 152064, 128, 350, 64, 64, 0, 0, 0, 1 },
513 { 11, 3000, 396, 345600, 192, 500, 128, 64, 0, 0, 0, 1 },
514 { 12, 6000, 396, 912384, 384, 1000, 128, 64, 0, 0, 0, 1 },
515 { 13, 11880, 396, 912384, 768, 2000, 128, 64, 0, 0, 0, 1 },
516 { 20, 11880, 396, 912384, 2000, 2000, 128, 64, 0, 0, 0, 1 },
517 { 21, 19800, 792, 1824768, 4000, 4000, 256, 64, 0, 0, 0, 0 },
518 { 22, 20250, 1620, 3110400, 4000, 4000, 256, 64, 0, 0, 0, 0 },
519 { 30, 40500, 1620, 3110400, 10000, 10000, 256, 32, 22, 0, 1, 0 },
520 { 31, 108000, 3600, 6912000, 14000, 14000, 512, 16, 60, 1, 1, 0 },
521 { 32, 216000, 5120, 7864320, 20000, 20000, 512, 16, 60, 1, 1, 0 },
522 { 40, 245760, 8192, 12582912, 20000, 25000, 512, 16, 60, 1, 1, 0 },
523 { 41, 245760, 8192, 12582912, 50000, 62500, 512, 16, 24, 1, 1, 0 },
524 { 42, 522240, 8704, 13369344, 50000, 62500, 512, 16, 24, 1, 1, 1 },
525 { 50, 589824, 22080, 42393600, 135000, 135000, 512, 16, 24, 1, 1, 1 },
526 { 51, 983040, 36864, 70778880, 240000, 240000, 512, 16, 24, 1, 1, 1 },
533 x264_log( h, X264_LOG_WARNING, __VA_ARGS__ );\
537 int x264_validate_levels( x264_t *h, int verbose )
540 int mbs = h->sps->i_mb_width * h->sps->i_mb_height;
541 int dpb = mbs * 384 * h->sps->i_num_ref_frames;
543 const x264_level_t *l = x264_levels;
544 while( l->level_idc != 0 && l->level_idc != h->param.i_level_idc )
547 if( l->frame_size < mbs
548 || l->frame_size*8 < h->sps->i_mb_width * h->sps->i_mb_width
549 || l->frame_size*8 < h->sps->i_mb_height * h->sps->i_mb_height )
550 ERROR( "frame MB size (%dx%d) > level limit (%d)\n",
551 h->sps->i_mb_width, h->sps->i_mb_height, l->frame_size );
553 ERROR( "DPB size (%d frames, %d bytes) > level limit (%d frames, %d bytes)\n",
554 h->sps->i_num_ref_frames, dpb, (int)(l->dpb / (384*mbs)), l->dpb );
556 #define CHECK( name, limit, val ) \
557 if( (val) > (limit) ) \
558 ERROR( name " (%d) > level limit (%d)\n", (int)(val), (limit) );
560 CHECK( "VBV bitrate", l->bitrate, h->param.rc.i_vbv_max_bitrate );
561 CHECK( "VBV buffer", l->cpb, h->param.rc.i_vbv_buffer_size );
562 CHECK( "MV range", l->mv_range, h->param.analyse.i_mv_range );
563 CHECK( "interlaced", !l->frame_only, h->param.b_interlaced );
565 if( h->param.i_fps_den > 0 )
566 CHECK( "MB rate", l->mbps, (int64_t)mbs * h->param.i_fps_num / h->param.i_fps_den );
567 if( h->sps->b_direct8x8_inference < l->direct8x8 )
568 ERROR( "direct 8x8 inference (0) < level requirement (1)\n" );
570 /* TODO check the rest of the limits */