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Revision 851 - (view) (download)
Original Path: trunk/xvidcore/src/bitstream/bitstream.c

1 : edgomez 851 /******************************************************************************
2 :     * *
3 :     * This file is part of XviD, a free MPEG-4 video encoder/decoder *
4 :     * *
5 :     * XviD is an implementation of a part of one or more MPEG-4 Video tools *
6 :     * as specified in ISO/IEC 14496-2 standard. Those intending to use this *
7 :     * software module in hardware or software products are advised that its *
8 :     * use may infringe existing patents or copyrights, and any such use *
9 :     * would be at such party's own risk. The original developer of this *
10 :     * software module and his/her company, and subsequent editors and their *
11 :     * companies, will have no liability for use of this software or *
12 :     * modifications or derivatives thereof. *
13 :     * *
14 :     * XviD is free software; you can redistribute it and/or modify it *
15 :     * under the terms of the GNU General Public License as published by *
16 :     * the Free Software Foundation; either version 2 of the License, or *
17 :     * (at your option) any later version. *
18 :     * *
19 :     * XviD is distributed in the hope that it will be useful, but *
20 :     * WITHOUT ANY WARRANTY; without even the implied warranty of *
21 :     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
22 :     * GNU General Public License for more details. *
23 :     * *
24 :     * You should have received a copy of the GNU General Public License *
25 :     * along with this program; if not, write to the Free Software *
26 :     * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA *
27 :     * *
28 :     ******************************************************************************/
29 : Isibaar 3
30 : edgomez 851 /******************************************************************************
31 :     * *
32 :     * bitstream.c *
33 :     * *
34 :     * Copyright (C) 2001 - Peter Ross <pross@cs.rmit.edu.au> *
35 :     * *
36 :     * For more information visit the XviD homepage: http://www.xvid.org *
37 :     * *
38 :     ******************************************************************************/
39 :    
40 :     /******************************************************************************
41 :     * *
42 :     * Revision history: *
43 :     * *
44 :     * 05.01.2003 GMC support - gruel *
45 :     * 04.10.2002 qpel support - Isibaar *
46 :     * 11.07.2002 add VOP width & height return to dec when dec->width *
47 :     * or dec->height is 0 (for use in examples/ex1.c) *
48 :     * MinChen <chenm001@163.com> *
49 :     * 22.05.2002 bs_put_matrix fix *
50 :     * 20.05.2002 added BitstreamWriteUserData *
51 :     * 19.06.2002 Fix a little bug in use custom quant matrix *
52 :     * MinChen <chenm001@163.com> *
53 :     * 08.05.2002 add low_delay support for B_VOP decode *
54 :     * MinChen <chenm001@163.com> *
55 :     * 06.05.2002 low_delay *
56 :     * 06.05.2002 fixed fincr/fbase error *
57 :     * 01.05.2002 added BVOP support to BitstreamWriteVopHeader *
58 :     * 15.04.2002 rewrite log2bin use asm386 By MinChen <chenm001@163.com> *
59 :     * 26.03.2002 interlacing support *
60 :     * 03.03.2002 qmatrix writing *
61 :     * 03.03.2002 merged BITREADER and BITWRITER *
62 :     * 30.02.2002 intra_dc_threshold support *
63 :     * 04.12.2001 support for additional headers *
64 :     * 16.12.2001 inital version *
65 :     * *
66 :     ******************************************************************************/
67 :    
68 :    
69 :     #include <string.h>
70 :     #include <stdio.h>
71 :    
72 : Isibaar 3 #include "bitstream.h"
73 :     #include "zigzag.h"
74 : Isibaar 4 #include "../quant/quant_matrix.h"
75 : edgomez 851 #include "mbcoding.h"
76 : Isibaar 3
77 : chenm001 124
78 : edgomez 195 static uint32_t __inline
79 :     log2bin(uint32_t value)
80 : Isibaar 3 {
81 : chenm001 124 /* Changed by Chenm001 */
82 : suxen_drol 529 #if !defined(_MSC_VER)
83 : Isibaar 3 int n = 0;
84 : edgomez 195
85 :     while (value) {
86 : Isibaar 3 value >>= 1;
87 :     n++;
88 :     }
89 :     return n;
90 : chenm001 124 #else
91 : edgomez 195 __asm {
92 : suxen_drol 206 bsr eax, value
93 :     inc eax
94 :     }
95 : chenm001 124 #endif
96 : Isibaar 3 }
97 :    
98 :    
99 : edgomez 195 static const uint32_t intra_dc_threshold_table[] = {
100 :     32, /* never use */
101 : Isibaar 3 13,
102 :     15,
103 :     17,
104 :     19,
105 :     21,
106 :     23,
107 :     1,
108 :     };
109 :    
110 :    
111 : edgomez 195 void
112 :     bs_get_matrix(Bitstream * bs,
113 :     uint8_t * matrix)
114 :     {
115 :     int i = 0;
116 :     int last, value = 0;
117 : Isibaar 4
118 : edgomez 195 do {
119 :     last = value;
120 :     value = BitstreamGetBits(bs, 8);
121 :     matrix[scan_tables[0][i++]] = value;
122 :     }
123 :     while (value != 0 && i < 64);
124 : edgomez 851 i--; // fix little bug at coeff not full
125 : edgomez 195
126 :     while (i < 64) {
127 :     matrix[scan_tables[0][i++]] = last;
128 :     }
129 :     }
130 :    
131 : suxen_drol 248
132 :    
133 : edgomez 851 // for PVOP addbits == fcode - 1
134 :     // for BVOP addbits == max(fcode,bcode) - 1
135 :     // returns mbpos
136 : suxen_drol 248 int
137 : edgomez 851 read_video_packet_header(Bitstream *bs,
138 :     DECODER * dec,
139 :     const int addbits,
140 :     int * quant,
141 :     int * fcode_forward,
142 :     int * fcode_backward,
143 :     int * intra_dc_threshold)
144 : suxen_drol 248 {
145 : edgomez 851 int startcode_bits = NUMBITS_VP_RESYNC_MARKER + addbits;
146 :     int mbnum_bits = log2bin(dec->mb_width * dec->mb_height - 1);
147 : suxen_drol 248 int mbnum;
148 : edgomez 851 int hec = 0;
149 : suxen_drol 248
150 :     BitstreamSkip(bs, BitstreamNumBitsToByteAlign(bs));
151 : edgomez 851 BitstreamSkip(bs, startcode_bits);
152 : suxen_drol 248
153 : suxen_drol 252 DPRINTF(DPRINTF_STARTCODE, "<video_packet_header>");
154 :    
155 : edgomez 851 if (dec->shape != VIDOBJLAY_SHAPE_RECTANGULAR)
156 :     {
157 :     hec = BitstreamGetBit(bs); /* header_extension_code */
158 :     if (hec && !(dec->sprite_enable == SPRITE_STATIC /* && current_coding_type = I_VOP */))
159 :     {
160 :     BitstreamSkip(bs, 13); /* vop_width */
161 :     READ_MARKER();
162 :     BitstreamSkip(bs, 13); /* vop_height */
163 :     READ_MARKER();
164 :     BitstreamSkip(bs, 13); /* vop_horizontal_mc_spatial_ref */
165 :     READ_MARKER();
166 :     BitstreamSkip(bs, 13); /* vop_vertical_mc_spatial_ref */
167 :     READ_MARKER();
168 :     }
169 :     }
170 : suxen_drol 248
171 : edgomez 851 mbnum = BitstreamGetBits(bs, mbnum_bits); /* macroblock_number */
172 : suxen_drol 252 DPRINTF(DPRINTF_HEADER, "mbnum %i", mbnum);
173 : suxen_drol 248
174 : edgomez 851 if (dec->shape != VIDOBJLAY_SHAPE_BINARY_ONLY)
175 :     {
176 :     *quant = BitstreamGetBits(bs, dec->quant_bits); /* quant_scale */
177 :     DPRINTF(DPRINTF_HEADER, "quant %i", *quant);
178 :     }
179 : suxen_drol 248
180 : edgomez 851 if (dec->shape == VIDOBJLAY_SHAPE_RECTANGULAR)
181 :     hec = BitstreamGetBit(bs); /* header_extension_code */
182 :    
183 :    
184 : suxen_drol 252 DPRINTF(DPRINTF_HEADER, "header_extension_code %i", hec);
185 : edgomez 851 if (hec)
186 :     {
187 :     int time_base;
188 :     int time_increment;
189 :     int coding_type;
190 : suxen_drol 248
191 : edgomez 851 for (time_base=0; BitstreamGetBit(bs)!=0; time_base++); /* modulo_time_base */
192 :     READ_MARKER();
193 :     if (dec->time_inc_bits)
194 :     time_increment = (BitstreamGetBits(bs, dec->time_inc_bits)); /* vop_time_increment */
195 :     READ_MARKER();
196 :     DPRINTF(DPRINTF_HEADER,"time %i:%i", time_base, time_increment);
197 :    
198 :     coding_type = BitstreamGetBits(bs, 2);
199 :     DPRINTF(DPRINTF_HEADER,"coding_type %i", coding_type);
200 :    
201 :     if (dec->shape != VIDOBJLAY_SHAPE_RECTANGULAR)
202 :     {
203 :     BitstreamSkip(bs, 1); /* change_conv_ratio_disable */
204 :     if (coding_type != I_VOP)
205 :     BitstreamSkip(bs, 1); /* vop_shape_coding_type */
206 :     }
207 :    
208 :     if (dec->shape != VIDOBJLAY_SHAPE_BINARY_ONLY)
209 :     {
210 :     *intra_dc_threshold = intra_dc_threshold_table[BitstreamGetBits(bs, 3)];
211 :    
212 :     if (dec->sprite_enable == SPRITE_GMC && coding_type == S_VOP &&
213 :     dec->sprite_warping_points > 0)
214 :     {
215 :     // TODO: sprite trajectory
216 :     }
217 :     if (dec->reduced_resolution_enable &&
218 :     dec->shape == VIDOBJLAY_SHAPE_RECTANGULAR &&
219 :     (coding_type == P_VOP || coding_type == I_VOP))
220 :     {
221 :     BitstreamSkip(bs, 1); /* XXX: vop_reduced_resolution */
222 :     }
223 :    
224 :     if (coding_type != I_VOP && fcode_forward)
225 :     {
226 :     *fcode_forward = BitstreamGetBits(bs, 3);
227 :     DPRINTF(DPRINTF_HEADER,"fcode_forward %i", *fcode_forward);
228 :     }
229 :    
230 :     if (coding_type == B_VOP && fcode_backward)
231 :     {
232 :     *fcode_backward = BitstreamGetBits(bs, 3);
233 :     DPRINTF(DPRINTF_HEADER,"fcode_backward %i", *fcode_backward);
234 :     }
235 :     }
236 :    
237 :     }
238 :    
239 :     if (dec->newpred_enable)
240 :     {
241 :     int vop_id;
242 :     int vop_id_for_prediction;
243 :    
244 :     vop_id = BitstreamGetBits(bs, MIN(dec->time_inc_bits + 3, 15));
245 :     DPRINTF(DPRINTF_HEADER, "vop_id %i", vop_id);
246 :     if (BitstreamGetBit(bs)) /* vop_id_for_prediction_indication */
247 :     {
248 :     vop_id_for_prediction = BitstreamGetBits(bs, MIN(dec->time_inc_bits + 3, 15));
249 :     DPRINTF(DPRINTF_HEADER, "vop_id_for_prediction %i", vop_id_for_prediction);
250 :     }
251 :     READ_MARKER();
252 :     }
253 :    
254 : suxen_drol 248 return mbnum;
255 :     }
256 :    
257 :    
258 :    
259 : edgomez 851
260 :     /* vol estimation header */
261 :     static void
262 :     read_vol_complexity_estimation_header(Bitstream * bs, DECODER * dec)
263 :     {
264 :     ESTIMATION * e = &dec->estimation;
265 :    
266 :     e->method = BitstreamGetBits(bs, 2); /* estimation_method */
267 :     DPRINTF(DPRINTF_HEADER,"+ complexity_estimation_header; method=%i", e->method);
268 :    
269 :     if (e->method == 0 || e->method == 1)
270 :     {
271 :     if (!BitstreamGetBit(bs)) /* shape_complexity_estimation_disable */
272 :     {
273 :     e->opaque = BitstreamGetBit(bs); /* opaque */
274 :     e->transparent = BitstreamGetBit(bs); /* transparent */
275 :     e->intra_cae = BitstreamGetBit(bs); /* intra_cae */
276 :     e->inter_cae = BitstreamGetBit(bs); /* inter_cae */
277 :     e->no_update = BitstreamGetBit(bs); /* no_update */
278 :     e->upsampling = BitstreamGetBit(bs); /* upsampling */
279 :     }
280 :    
281 :     if (!BitstreamGetBit(bs)) /* texture_complexity_estimation_set_1_disable */
282 :     {
283 :     e->intra_blocks = BitstreamGetBit(bs); /* intra_blocks */
284 :     e->inter_blocks = BitstreamGetBit(bs); /* inter_blocks */
285 :     e->inter4v_blocks = BitstreamGetBit(bs); /* inter4v_blocks */
286 :     e->not_coded_blocks = BitstreamGetBit(bs); /* not_coded_blocks */
287 :     }
288 :     }
289 :    
290 :     READ_MARKER();
291 :    
292 :     if (!BitstreamGetBit(bs)) /* texture_complexity_estimation_set_2_disable */
293 :     {
294 :     e->dct_coefs = BitstreamGetBit(bs); /* dct_coefs */
295 :     e->dct_lines = BitstreamGetBit(bs); /* dct_lines */
296 :     e->vlc_symbols = BitstreamGetBit(bs); /* vlc_symbols */
297 :     e->vlc_bits = BitstreamGetBit(bs); /* vlc_bits */
298 :     }
299 :    
300 :     if (!BitstreamGetBit(bs)) /* motion_compensation_complexity_disable */
301 :     {
302 :     e->apm = BitstreamGetBit(bs); /* apm */
303 :     e->npm = BitstreamGetBit(bs); /* npm */
304 :     e->interpolate_mc_q = BitstreamGetBit(bs); /* interpolate_mc_q */
305 :     e->forw_back_mc_q = BitstreamGetBit(bs); /* forw_back_mc_q */
306 :     e->halfpel2 = BitstreamGetBit(bs); /* halfpel2 */
307 :     e->halfpel4 = BitstreamGetBit(bs); /* halfpel4 */
308 :     }
309 :    
310 :     READ_MARKER();
311 :    
312 :     if (e->method == 1)
313 :     {
314 :     if (!BitstreamGetBit(bs)) /* version2_complexity_estimation_disable */
315 :     {
316 :     e->sadct = BitstreamGetBit(bs); /* sadct */
317 :     e->quarterpel = BitstreamGetBit(bs); /* quarterpel */
318 :     }
319 :     }
320 :     }
321 :    
322 :    
323 :     /* vop estimation header */
324 :     static void
325 :     read_vop_complexity_estimation_header(Bitstream * bs, DECODER * dec, int coding_type)
326 :     {
327 :     ESTIMATION * e = &dec->estimation;
328 :    
329 :     if (e->method == 0 || e->method == 1)
330 :     {
331 :     if (coding_type == I_VOP) {
332 :     if (e->opaque) BitstreamSkip(bs, 8); /* dcecs_opaque */
333 :     if (e->transparent) BitstreamSkip(bs, 8); /* */
334 :     if (e->intra_cae) BitstreamSkip(bs, 8); /* */
335 :     if (e->inter_cae) BitstreamSkip(bs, 8); /* */
336 :     if (e->no_update) BitstreamSkip(bs, 8); /* */
337 :     if (e->upsampling) BitstreamSkip(bs, 8); /* */
338 :     if (e->intra_blocks) BitstreamSkip(bs, 8); /* */
339 :     if (e->not_coded_blocks) BitstreamSkip(bs, 8); /* */
340 :     if (e->dct_coefs) BitstreamSkip(bs, 8); /* */
341 :     if (e->dct_lines) BitstreamSkip(bs, 8); /* */
342 :     if (e->vlc_symbols) BitstreamSkip(bs, 8); /* */
343 :     if (e->vlc_bits) BitstreamSkip(bs, 8); /* */
344 :     if (e->sadct) BitstreamSkip(bs, 8); /* */
345 :     }
346 :    
347 :     if (coding_type == P_VOP) {
348 :     if (e->opaque) BitstreamSkip(bs, 8); /* */
349 :     if (e->transparent) BitstreamSkip(bs, 8); /* */
350 :     if (e->intra_cae) BitstreamSkip(bs, 8); /* */
351 :     if (e->inter_cae) BitstreamSkip(bs, 8); /* */
352 :     if (e->no_update) BitstreamSkip(bs, 8); /* */
353 :     if (e->upsampling) BitstreamSkip(bs, 8); /* */
354 :     if (e->intra_blocks) BitstreamSkip(bs, 8); /* */
355 :     if (e->not_coded_blocks) BitstreamSkip(bs, 8); /* */
356 :     if (e->dct_coefs) BitstreamSkip(bs, 8); /* */
357 :     if (e->dct_lines) BitstreamSkip(bs, 8); /* */
358 :     if (e->vlc_symbols) BitstreamSkip(bs, 8); /* */
359 :     if (e->vlc_bits) BitstreamSkip(bs, 8); /* */
360 :     if (e->inter_blocks) BitstreamSkip(bs, 8); /* */
361 :     if (e->inter4v_blocks) BitstreamSkip(bs, 8); /* */
362 :     if (e->apm) BitstreamSkip(bs, 8); /* */
363 :     if (e->npm) BitstreamSkip(bs, 8); /* */
364 :     if (e->forw_back_mc_q) BitstreamSkip(bs, 8); /* */
365 :     if (e->halfpel2) BitstreamSkip(bs, 8); /* */
366 :     if (e->halfpel4) BitstreamSkip(bs, 8); /* */
367 :     if (e->sadct) BitstreamSkip(bs, 8); /* */
368 :     if (e->quarterpel) BitstreamSkip(bs, 8); /* */
369 :     }
370 :     if (coding_type == B_VOP) {
371 :     if (e->opaque) BitstreamSkip(bs, 8); /* */
372 :     if (e->transparent) BitstreamSkip(bs, 8); /* */
373 :     if (e->intra_cae) BitstreamSkip(bs, 8); /* */
374 :     if (e->inter_cae) BitstreamSkip(bs, 8); /* */
375 :     if (e->no_update) BitstreamSkip(bs, 8); /* */
376 :     if (e->upsampling) BitstreamSkip(bs, 8); /* */
377 :     if (e->intra_blocks) BitstreamSkip(bs, 8); /* */
378 :     if (e->not_coded_blocks) BitstreamSkip(bs, 8); /* */
379 :     if (e->dct_coefs) BitstreamSkip(bs, 8); /* */
380 :     if (e->dct_lines) BitstreamSkip(bs, 8); /* */
381 :     if (e->vlc_symbols) BitstreamSkip(bs, 8); /* */
382 :     if (e->vlc_bits) BitstreamSkip(bs, 8); /* */
383 :     if (e->inter_blocks) BitstreamSkip(bs, 8); /* */
384 :     if (e->inter4v_blocks) BitstreamSkip(bs, 8); /* */
385 :     if (e->apm) BitstreamSkip(bs, 8); /* */
386 :     if (e->npm) BitstreamSkip(bs, 8); /* */
387 :     if (e->forw_back_mc_q) BitstreamSkip(bs, 8); /* */
388 :     if (e->halfpel2) BitstreamSkip(bs, 8); /* */
389 :     if (e->halfpel4) BitstreamSkip(bs, 8); /* */
390 :     if (e->interpolate_mc_q) BitstreamSkip(bs, 8); /* */
391 :     if (e->sadct) BitstreamSkip(bs, 8); /* */
392 :     if (e->quarterpel) BitstreamSkip(bs, 8); /* */
393 :     }
394 :    
395 :     if (coding_type == S_VOP && dec->sprite_enable == SPRITE_STATIC) {
396 :     if (e->intra_blocks) BitstreamSkip(bs, 8); /* */
397 :     if (e->not_coded_blocks) BitstreamSkip(bs, 8); /* */
398 :     if (e->dct_coefs) BitstreamSkip(bs, 8); /* */
399 :     if (e->dct_lines) BitstreamSkip(bs, 8); /* */
400 :     if (e->vlc_symbols) BitstreamSkip(bs, 8); /* */
401 :     if (e->vlc_bits) BitstreamSkip(bs, 8); /* */
402 :     if (e->inter_blocks) BitstreamSkip(bs, 8); /* */
403 :     if (e->inter4v_blocks) BitstreamSkip(bs, 8); /* */
404 :     if (e->apm) BitstreamSkip(bs, 8); /* */
405 :     if (e->npm) BitstreamSkip(bs, 8); /* */
406 :     if (e->forw_back_mc_q) BitstreamSkip(bs, 8); /* */
407 :     if (e->halfpel2) BitstreamSkip(bs, 8); /* */
408 :     if (e->halfpel4) BitstreamSkip(bs, 8); /* */
409 :     if (e->interpolate_mc_q) BitstreamSkip(bs, 8); /* */
410 :     }
411 :     }
412 :     }
413 :    
414 :    
415 :    
416 :    
417 :    
418 : Isibaar 3 /*
419 :     decode headers
420 :     returns coding_type, or -1 if error
421 :     */
422 :    
423 : suxen_drol 252 #define VIDOBJ_START_CODE_MASK 0x0000001f
424 :     #define VIDOBJLAY_START_CODE_MASK 0x0000000f
425 :    
426 : edgomez 195 int
427 :     BitstreamReadHeaders(Bitstream * bs,
428 :     DECODER * dec,
429 :     uint32_t * rounding,
430 : edgomez 851 uint32_t * reduced_resolution,
431 : edgomez 195 uint32_t * quant,
432 :     uint32_t * fcode_forward,
433 :     uint32_t * fcode_backward,
434 : edgomez 851 uint32_t * intra_dc_threshold,
435 :     WARPPOINTS *gmc_warp)
436 : Isibaar 3 {
437 :     uint32_t vol_ver_id;
438 :     uint32_t coding_type;
439 :     uint32_t start_code;
440 : edgomez 195 uint32_t time_incr = 0;
441 : edgomez 851 int32_t time_increment;
442 :     int resize = 0;
443 : chenm001 156
444 : edgomez 195 do {
445 : edgomez 851
446 : Isibaar 3 BitstreamByteAlign(bs);
447 :     start_code = BitstreamShowBits(bs, 32);
448 :    
449 : edgomez 195 if (start_code == VISOBJSEQ_START_CODE) {
450 : suxen_drol 252
451 :     int profile;
452 :    
453 :     DPRINTF(DPRINTF_STARTCODE, "<visual_object_sequence>");
454 :    
455 : edgomez 851 BitstreamSkip(bs, 32); // visual_object_sequence_start_code
456 :     profile = BitstreamGetBits(bs, 8); // profile_and_level_indication
457 : suxen_drol 252
458 :     DPRINTF(DPRINTF_HEADER, "profile_and_level_indication %i", profile);
459 :    
460 : edgomez 195 } else if (start_code == VISOBJSEQ_STOP_CODE) {
461 : suxen_drol 252
462 : edgomez 851 BitstreamSkip(bs, 32); // visual_object_sequence_stop_code
463 : suxen_drol 252
464 :     DPRINTF(DPRINTF_STARTCODE, "</visual_object_sequence>");
465 :    
466 : edgomez 195 } else if (start_code == VISOBJ_START_CODE) {
467 : edgomez 851 int visobj_ver_id;
468 : suxen_drol 252
469 :     DPRINTF(DPRINTF_STARTCODE, "<visual_object>");
470 :    
471 : edgomez 851 BitstreamSkip(bs, 32); // visual_object_start_code
472 :     if (BitstreamGetBit(bs)) // is_visual_object_identified
473 : Isibaar 3 {
474 : edgomez 851 visobj_ver_id = BitstreamGetBits(bs, 4); // visual_object_ver_id
475 :     DPRINTF(DPRINTF_HEADER,"visobj_ver_id %i", visobj_ver_id);
476 :     BitstreamSkip(bs, 3); // visual_object_priority
477 : edgomez 195 } else {
478 : edgomez 851 visobj_ver_id = 1;
479 : Isibaar 3 }
480 :    
481 : edgomez 851 if (BitstreamShowBits(bs, 4) != VISOBJ_TYPE_VIDEO) // visual_object_type
482 : Isibaar 3 {
483 : suxen_drol 252 DPRINTF(DPRINTF_ERROR, "visual_object_type != video");
484 : Isibaar 3 return -1;
485 :     }
486 :     BitstreamSkip(bs, 4);
487 :    
488 : edgomez 851 // video_signal_type
489 : Isibaar 3
490 : edgomez 851 if (BitstreamGetBit(bs)) // video_signal_type
491 : Isibaar 3 {
492 : suxen_drol 252 DPRINTF(DPRINTF_HEADER,"+ video_signal_type");
493 : edgomez 851 BitstreamSkip(bs, 3); // video_format
494 :     BitstreamSkip(bs, 1); // video_range
495 :     if (BitstreamGetBit(bs)) // color_description
496 : Isibaar 3 {
497 : suxen_drol 252 DPRINTF(DPRINTF_HEADER,"+ color_description");
498 : edgomez 851 BitstreamSkip(bs, 8); // color_primaries
499 :     BitstreamSkip(bs, 8); // transfer_characteristics
500 :     BitstreamSkip(bs, 8); // matrix_coefficients
501 : Isibaar 3 }
502 :     }
503 : suxen_drol 252 } else if ((start_code & ~VIDOBJ_START_CODE_MASK) == VIDOBJ_START_CODE) {
504 :    
505 :     DPRINTF(DPRINTF_STARTCODE, "<video_object>");
506 :     DPRINTF(DPRINTF_HEADER, "vo id %i", start_code & VIDOBJ_START_CODE_MASK);
507 :    
508 : edgomez 851 BitstreamSkip(bs, 32); // video_object_start_code
509 : suxen_drol 252
510 :     } else if ((start_code & ~VIDOBJLAY_START_CODE_MASK) == VIDOBJLAY_START_CODE) {
511 :    
512 :     DPRINTF(DPRINTF_STARTCODE, "<video_object_layer>");
513 :     DPRINTF(DPRINTF_HEADER, "vol id %i", start_code & VIDOBJLAY_START_CODE_MASK);
514 :    
515 : edgomez 851 BitstreamSkip(bs, 32); // video_object_layer_start_code
516 : Isibaar 3
517 : edgomez 851 BitstreamSkip(bs, 1); // random_accessible_vol
518 : Isibaar 3
519 : edgomez 851 // video_object_type_indication
520 :     if (BitstreamShowBits(bs, 8) != VIDOBJLAY_TYPE_SIMPLE &&
521 :     BitstreamShowBits(bs, 8) != VIDOBJLAY_TYPE_CORE &&
522 :     BitstreamShowBits(bs, 8) != VIDOBJLAY_TYPE_MAIN &&
523 :     BitstreamShowBits(bs, 8) != VIDOBJLAY_TYPE_ACE &&
524 :     BitstreamShowBits(bs, 8) != VIDOBJLAY_TYPE_ART_SIMPLE &&
525 :     BitstreamShowBits(bs, 8) != 0) // BUGGY DIVX
526 : Isibaar 3 {
527 : suxen_drol 252 DPRINTF(DPRINTF_ERROR,"video_object_type_indication %i not supported ",
528 :     BitstreamShowBits(bs, 8));
529 : Isibaar 3 return -1;
530 :     }
531 :     BitstreamSkip(bs, 8);
532 :    
533 :    
534 : edgomez 851 if (BitstreamGetBit(bs)) // is_object_layer_identifier
535 : Isibaar 3 {
536 : suxen_drol 252 DPRINTF(DPRINTF_HEADER, "+ is_object_layer_identifier");
537 : edgomez 851 vol_ver_id = BitstreamGetBits(bs, 4); // video_object_layer_verid
538 : suxen_drol 252 DPRINTF(DPRINTF_HEADER,"ver_id %i", vol_ver_id);
539 : edgomez 851 BitstreamSkip(bs, 3); // video_object_layer_priority
540 : edgomez 195 } else {
541 : Isibaar 3 vol_ver_id = 1;
542 :     }
543 :    
544 : edgomez 851 dec->aspect_ratio = BitstreamGetBits(bs, 4);
545 :    
546 :     if (dec->aspect_ratio == VIDOBJLAY_AR_EXTPAR) // aspect_ratio_info
547 : Isibaar 3 {
548 : suxen_drol 252 DPRINTF(DPRINTF_HEADER, "+ aspect_ratio_info");
549 : edgomez 851 dec->par_width = BitstreamGetBits(bs, 8); // par_width
550 :     dec->par_height = BitstreamGetBits(bs, 8); // par_height
551 : Isibaar 3 }
552 :    
553 : edgomez 851 if (BitstreamGetBit(bs)) // vol_control_parameters
554 : Isibaar 3 {
555 : suxen_drol 252 DPRINTF(DPRINTF_HEADER, "+ vol_control_parameters");
556 : edgomez 851 BitstreamSkip(bs, 2); // chroma_format
557 :     dec->low_delay = BitstreamGetBit(bs); // low_delay
558 : suxen_drol 252 DPRINTF(DPRINTF_HEADER, "low_delay %i", dec->low_delay);
559 : edgomez 851 if (BitstreamGetBit(bs)) // vbv_parameters
560 : Isibaar 3 {
561 : edgomez 851 unsigned int bitrate;
562 :     unsigned int buffer_size;
563 :     unsigned int occupancy;
564 :    
565 : suxen_drol 252 DPRINTF(DPRINTF_HEADER,"+ vbv_parameters");
566 : edgomez 851
567 :     bitrate = BitstreamGetBits(bs,15) << 15; // first_half_bit_rate
568 : Isibaar 3 READ_MARKER();
569 : edgomez 851 bitrate |= BitstreamGetBits(bs,15); // latter_half_bit_rate
570 : Isibaar 3 READ_MARKER();
571 : edgomez 851
572 :     buffer_size = BitstreamGetBits(bs, 15) << 3; // first_half_vbv_buffer_size
573 : Isibaar 3 READ_MARKER();
574 : edgomez 851 buffer_size |= BitstreamGetBits(bs, 3); // latter_half_vbv_buffer_size
575 :    
576 :     occupancy = BitstreamGetBits(bs, 11) << 15; // first_half_vbv_occupancy
577 : Isibaar 3 READ_MARKER();
578 : edgomez 851 occupancy |= BitstreamGetBits(bs, 15); // latter_half_vbv_occupancy
579 : Isibaar 3 READ_MARKER();
580 : edgomez 195
581 : edgomez 851 DPRINTF(DPRINTF_HEADER,"bitrate %d (unit=400 bps)", bitrate);
582 :     DPRINTF(DPRINTF_HEADER,"buffer_size %d (unit=16384 bits)", buffer_size);
583 :     DPRINTF(DPRINTF_HEADER,"occupancy %d (unit=64 bits)", occupancy);
584 : Isibaar 3 }
585 : edgomez 851 }else{
586 :     dec->low_delay = dec->low_delay_default;
587 : Isibaar 3 }
588 :    
589 : edgomez 851 dec->shape = BitstreamGetBits(bs, 2); // video_object_layer_shape
590 :    
591 : suxen_drol 252 DPRINTF(DPRINTF_HEADER, "shape %i", dec->shape);
592 : edgomez 851 if (dec->shape != VIDOBJLAY_SHAPE_RECTANGULAR)
593 :     {
594 :     DPRINTF(DPRINTF_ERROR,"non-rectangular shapes are not supported");
595 :     }
596 : edgomez 195
597 :     if (dec->shape == VIDOBJLAY_SHAPE_GRAYSCALE && vol_ver_id != 1) {
598 : edgomez 851 BitstreamSkip(bs, 4); // video_object_layer_shape_extension
599 : Isibaar 3 }
600 :    
601 :     READ_MARKER();
602 :    
603 : edgomez 851 // *************************** for decode B-frame time ***********************
604 :     dec->time_inc_resolution = BitstreamGetBits(bs, 16); // vop_time_increment_resolution
605 :     DPRINTF(DPRINTF_HEADER,"vop_time_increment_resolution %i", dec->time_inc_resolution);
606 : suxen_drol 252
607 : edgomez 851 // dec->time_inc_resolution--;
608 : suxen_drol 252
609 : edgomez 851 if (dec->time_inc_resolution > 0) {
610 :     dec->time_inc_bits = log2bin(dec->time_inc_resolution-1);
611 : edgomez 195 } else {
612 : edgomez 851 // dec->time_inc_bits = 0;
613 :     // for "old" xvid compatibility, set time_inc_bits = 1
614 : Isibaar 3 dec->time_inc_bits = 1;
615 :     }
616 :    
617 :     READ_MARKER();
618 :    
619 : edgomez 851 if (BitstreamGetBit(bs)) // fixed_vop_rate
620 : Isibaar 3 {
621 : suxen_drol 252 DPRINTF(DPRINTF_HEADER, "+ fixed_vop_rate");
622 : edgomez 851 BitstreamSkip(bs, dec->time_inc_bits); // fixed_vop_time_increment
623 : Isibaar 3 }
624 :    
625 : edgomez 195 if (dec->shape != VIDOBJLAY_SHAPE_BINARY_ONLY) {
626 : Isibaar 3
627 : edgomez 195 if (dec->shape == VIDOBJLAY_SHAPE_RECTANGULAR) {
628 : Isibaar 3 uint32_t width, height;
629 :    
630 :     READ_MARKER();
631 : edgomez 851 width = BitstreamGetBits(bs, 13); // video_object_layer_width
632 : Isibaar 3 READ_MARKER();
633 : edgomez 851 height = BitstreamGetBits(bs, 13); // video_object_layer_height
634 : Isibaar 3 READ_MARKER();
635 :    
636 : suxen_drol 252 DPRINTF(DPRINTF_HEADER, "width %i", width);
637 :     DPRINTF(DPRINTF_HEADER, "height %i", height);
638 :    
639 : edgomez 851 if (dec->width != width || dec->height != height)
640 :     {
641 :     if (dec->fixed_dimensions)
642 :     {
643 :     DPRINTF(DPRINTF_ERROR, "XVID_DEC_PARAM width/height does not match bitstream");
644 :     return -1;
645 :     }
646 :     resize = 1;
647 : chenm001 294 dec->width = width;
648 :     dec->height = height;
649 : Isibaar 3 }
650 :     }
651 : h 69
652 : suxen_drol 252 dec->interlacing = BitstreamGetBit(bs);
653 : edgomez 851 DPRINTF(DPRINTF_HEADER, "interlacing %i", dec->interlacing);
654 : Isibaar 3
655 : edgomez 851 if (!BitstreamGetBit(bs)) // obmc_disable
656 : Isibaar 3 {
657 : suxen_drol 252 DPRINTF(DPRINTF_ERROR, "obmc_disabled==false not supported");
658 : edgomez 851 // TODO
659 :     // fucking divx4.02 has this enabled
660 : Isibaar 3 }
661 :    
662 : edgomez 851 dec->sprite_enable = BitstreamGetBits(bs, (vol_ver_id == 1 ? 1 : 2)); // sprite_enable
663 :    
664 :     if (dec->sprite_enable == SPRITE_STATIC || dec->sprite_enable == SPRITE_GMC)
665 : Isibaar 3 {
666 : edgomez 851 int low_latency_sprite_enable;
667 :    
668 :     if (dec->sprite_enable != SPRITE_GMC)
669 :     {
670 :     int sprite_width;
671 :     int sprite_height;
672 :     int sprite_left_coord;
673 :     int sprite_top_coord;
674 :     sprite_width = BitstreamGetBits(bs, 13); // sprite_width
675 :     READ_MARKER();
676 :     sprite_height = BitstreamGetBits(bs, 13); // sprite_height
677 :     READ_MARKER();
678 :     sprite_left_coord = BitstreamGetBits(bs, 13); // sprite_left_coordinate
679 :     READ_MARKER();
680 :     sprite_top_coord = BitstreamGetBits(bs, 13); // sprite_top_coordinate
681 :     READ_MARKER();
682 :     }
683 :     dec->sprite_warping_points = BitstreamGetBits(bs, 6); // no_of_sprite_warping_points
684 :     dec->sprite_warping_accuracy = BitstreamGetBits(bs, 2); // sprite_warping_accuracy
685 :     dec->sprite_brightness_change = BitstreamGetBits(bs, 1); // brightness_change
686 :     if (dec->sprite_enable != SPRITE_GMC)
687 :     {
688 :     low_latency_sprite_enable = BitstreamGetBits(bs, 1); // low_latency_sprite_enable
689 :     }
690 : Isibaar 3 }
691 : edgomez 195
692 :     if (vol_ver_id != 1 &&
693 :     dec->shape != VIDOBJLAY_SHAPE_RECTANGULAR) {
694 : edgomez 851 BitstreamSkip(bs, 1); // sadct_disable
695 : Isibaar 3 }
696 :    
697 : edgomez 851 if (BitstreamGetBit(bs)) // not_8_bit
698 : Isibaar 3 {
699 : suxen_drol 252 DPRINTF(DPRINTF_HEADER, "not_8_bit==true (ignored)");
700 : edgomez 851 dec->quant_bits = BitstreamGetBits(bs, 4); // quant_precision
701 :     BitstreamSkip(bs, 4); // bits_per_pixel
702 : edgomez 195 } else {
703 : Isibaar 3 dec->quant_bits = 5;
704 :     }
705 :    
706 : edgomez 195 if (dec->shape == VIDOBJLAY_SHAPE_GRAYSCALE) {
707 : edgomez 851 BitstreamSkip(bs, 1); // no_gray_quant_update
708 :     BitstreamSkip(bs, 1); // composition_method
709 :     BitstreamSkip(bs, 1); // linear_composition
710 : Isibaar 3 }
711 :    
712 : edgomez 851 dec->quant_type = BitstreamGetBit(bs); // quant_type
713 : suxen_drol 252 DPRINTF(DPRINTF_HEADER, "quant_type %i", dec->quant_type);
714 : Isibaar 3
715 : edgomez 195 if (dec->quant_type) {
716 : edgomez 851 if (BitstreamGetBit(bs)) // load_intra_quant_mat
717 : Isibaar 3 {
718 : Isibaar 20 uint8_t matrix[64];
719 : edgomez 195
720 : suxen_drol 252 DPRINTF(DPRINTF_HEADER, "load_intra_quant_mat");
721 :    
722 : Isibaar 4 bs_get_matrix(bs, matrix);
723 :     set_intra_matrix(matrix);
724 : edgomez 195 } else
725 : Isibaar 20 set_intra_matrix(get_default_intra_matrix());
726 : Isibaar 4
727 : edgomez 851 if (BitstreamGetBit(bs)) // load_inter_quant_mat
728 : Isibaar 3 {
729 : edgomez 195 uint8_t matrix[64];
730 : suxen_drol 252
731 :     DPRINTF(DPRINTF_HEADER, "load_inter_quant_mat");
732 : edgomez 195
733 : Isibaar 4 bs_get_matrix(bs, matrix);
734 :     set_inter_matrix(matrix);
735 : edgomez 195 } else
736 : Isibaar 20 set_inter_matrix(get_default_inter_matrix());
737 : Isibaar 3
738 : edgomez 195 if (dec->shape == VIDOBJLAY_SHAPE_GRAYSCALE) {
739 : suxen_drol 252 DPRINTF(DPRINTF_ERROR, "greyscale matrix not supported");
740 : Isibaar 3 return -1;
741 :     }
742 : Isibaar 4
743 : Isibaar 3 }
744 :    
745 : edgomez 195
746 :     if (vol_ver_id != 1) {
747 : edgomez 851 dec->quarterpel = BitstreamGetBit(bs); // quarter_sample
748 :     DPRINTF(DPRINTF_HEADER,"quarterpel %i", dec->quarterpel);
749 : Isibaar 3 }
750 : Isibaar 333 else
751 :     dec->quarterpel = 0;
752 :    
753 : Isibaar 3
754 : edgomez 851 dec->complexity_estimation_disable = BitstreamGetBit(bs); /* complexity estimation disable */
755 :     if (!dec->complexity_estimation_disable)
756 : Isibaar 3 {
757 : edgomez 851 read_vol_complexity_estimation_header(bs, dec);
758 : Isibaar 3 }
759 :    
760 : edgomez 851 BitstreamSkip(bs, 1); // resync_marker_disable
761 : Isibaar 3
762 : edgomez 851 if (BitstreamGetBit(bs)) // data_partitioned
763 : Isibaar 3 {
764 : suxen_drol 252 DPRINTF(DPRINTF_ERROR, "data_partitioned not supported");
765 : edgomez 851 BitstreamSkip(bs, 1); // reversible_vlc
766 : Isibaar 3 }
767 :    
768 : edgomez 195 if (vol_ver_id != 1) {
769 : edgomez 851 dec->newpred_enable = BitstreamGetBit(bs);
770 :     if (dec->newpred_enable) // newpred_enable
771 : Isibaar 3 {
772 : suxen_drol 252 DPRINTF(DPRINTF_HEADER, "+ newpred_enable");
773 : edgomez 851 BitstreamSkip(bs, 2); // requested_upstream_message_type
774 :     BitstreamSkip(bs, 1); // newpred_segment_type
775 : Isibaar 3 }
776 : edgomez 851 dec->reduced_resolution_enable = BitstreamGetBit(bs); /* reduced_resolution_vop_enable */
777 :     DPRINTF(DPRINTF_HEADER, "reduced_resolution_enable %i", dec->reduced_resolution_enable);
778 : Isibaar 3 }
779 : edgomez 851 else
780 :     {
781 :     dec->newpred_enable = 0;
782 :     dec->reduced_resolution_enable = 0;
783 :     }
784 : edgomez 195
785 : edgomez 851 dec->scalability = BitstreamGetBit(bs); /* scalability */
786 :     if (dec->scalability)
787 : Isibaar 3 {
788 : suxen_drol 252 DPRINTF(DPRINTF_ERROR, "scalability not supported");
789 : edgomez 851 BitstreamSkip(bs, 1); /* hierarchy_type */
790 :     BitstreamSkip(bs, 4); /* ref_layer_id */
791 :     BitstreamSkip(bs, 1); /* ref_layer_sampling_direc */
792 :     BitstreamSkip(bs, 5); /* hor_sampling_factor_n */
793 :     BitstreamSkip(bs, 5); /* hor_sampling_factor_m */
794 :     BitstreamSkip(bs, 5); /* vert_sampling_factor_n */
795 :     BitstreamSkip(bs, 5); /* vert_sampling_factor_m */
796 :     BitstreamSkip(bs, 1); /* enhancement_type */
797 :     if(dec->shape == VIDOBJLAY_SHAPE_BINARY /* && hierarchy_type==0 */) {
798 :     BitstreamSkip(bs, 1); /* use_ref_shape */
799 :     BitstreamSkip(bs, 1); /* use_ref_texture */
800 :     BitstreamSkip(bs, 5); /* shape_hor_sampling_factor_n */
801 :     BitstreamSkip(bs, 5); /* shape_hor_sampling_factor_m */
802 :     BitstreamSkip(bs, 5); /* shape_vert_sampling_factor_n */
803 :     BitstreamSkip(bs, 5); /* shape_vert_sampling_factor_m */
804 :     }
805 : Isibaar 3 return -1;
806 :     }
807 : edgomez 851 } else // dec->shape == BINARY_ONLY
808 : Isibaar 3 {
809 : edgomez 195 if (vol_ver_id != 1) {
810 : edgomez 851 dec->scalability = BitstreamGetBit(bs); /* scalability */
811 :     if (dec->scalability)
812 : Isibaar 3 {
813 : edgomez 851 DPRINTF(DPRINTF_ERROR, "scalability not supported");
814 :     BitstreamSkip(bs, 4); /* ref_layer_id */
815 :     BitstreamSkip(bs, 5); /* hor_sampling_factor_n */
816 :     BitstreamSkip(bs, 5); /* hor_sampling_factor_m */
817 :     BitstreamSkip(bs, 5); /* vert_sampling_factor_n */
818 :     BitstreamSkip(bs, 5); /* vert_sampling_factor_m */
819 : Isibaar 3 return -1;
820 :     }
821 :     }
822 : edgomez 851 BitstreamSkip(bs, 1); // resync_marker_disable
823 : Isibaar 3
824 :     }
825 :    
826 : edgomez 851 return (resize ? -3 : -2 ); /* VOL */
827 :    
828 : edgomez 195 } else if (start_code == GRPOFVOP_START_CODE) {
829 : suxen_drol 252
830 :     DPRINTF(DPRINTF_STARTCODE, "<group_of_vop>");
831 :    
832 : Isibaar 3 BitstreamSkip(bs, 32);
833 :     {
834 :     int hours, minutes, seconds;
835 : edgomez 195
836 : Isibaar 3 hours = BitstreamGetBits(bs, 5);
837 :     minutes = BitstreamGetBits(bs, 6);
838 :     READ_MARKER();
839 :     seconds = BitstreamGetBits(bs, 6);
840 : suxen_drol 252
841 : edgomez 851 DPRINTF(DPRINTF_HEADER, "time %ih%im%is", hours,minutes,seconds);
842 : Isibaar 3 }
843 : edgomez 851 BitstreamSkip(bs, 1); // closed_gov
844 :     BitstreamSkip(bs, 1); // broken_link
845 : suxen_drol 252
846 : edgomez 195 } else if (start_code == VOP_START_CODE) {
847 : suxen_drol 252
848 :     DPRINTF(DPRINTF_STARTCODE, "<vop>");
849 :    
850 : edgomez 851 BitstreamSkip(bs, 32); // vop_start_code
851 : Isibaar 3
852 : edgomez 851 coding_type = BitstreamGetBits(bs, 2); // vop_coding_type
853 : suxen_drol 252 DPRINTF(DPRINTF_HEADER, "coding_type %i", coding_type);
854 : Isibaar 3
855 : edgomez 851 // *************************** for decode B-frame time ***********************
856 :     while (BitstreamGetBit(bs) != 0) // time_base
857 : chenm001 156 time_incr++;
858 : edgomez 195
859 : Isibaar 3 READ_MARKER();
860 : edgomez 195
861 :     if (dec->time_inc_bits) {
862 : edgomez 851 time_increment = (BitstreamGetBits(bs, dec->time_inc_bits)); // vop_time_increment
863 : Isibaar 3 }
864 : suxen_drol 240
865 : suxen_drol 252 DPRINTF(DPRINTF_HEADER, "time_base %i", time_incr);
866 :     DPRINTF(DPRINTF_HEADER, "time_increment %i", time_increment);
867 :    
868 :     DPRINTF(DPRINTF_TIMECODE, "%c %i:%i",
869 : edgomez 851 coding_type == I_VOP ? 'I' : coding_type == P_VOP ? 'P' : coding_type == B_VOP ? 'B' : 'S',
870 : suxen_drol 240 time_incr, time_increment);
871 :    
872 : edgomez 195 if (coding_type != B_VOP) {
873 :     dec->last_time_base = dec->time_base;
874 : chenm001 156 dec->time_base += time_incr;
875 : chl 316 dec->time = time_increment;
876 :    
877 : edgomez 851 /* dec->time_base * dec->time_inc_resolution +
878 : edgomez 195 time_increment;
879 : chl 316 */ dec->time_pp = (uint32_t)
880 : edgomez 851 (dec->time_inc_resolution + dec->time - dec->last_non_b_time)%dec->time_inc_resolution;
881 : edgomez 195 dec->last_non_b_time = dec->time;
882 :     } else {
883 : chl 316 dec->time = time_increment;
884 :     /*
885 : edgomez 195 (dec->last_time_base +
886 : edgomez 851 time_incr) * dec->time_inc_resolution + time_increment;
887 : chl 316 */
888 : chl 313 dec->time_bp = (uint32_t)
889 : edgomez 851 (dec->time_inc_resolution + dec->last_non_b_time - dec->time)%dec->time_inc_resolution;
890 : chenm001 156 }
891 : edgomez 851 DPRINTF(DPRINTF_HEADER,"time_pp=%i", dec->time_pp);
892 :     DPRINTF(DPRINTF_HEADER,"time_bp=%i", dec->time_bp);
893 : Isibaar 3
894 :     READ_MARKER();
895 :    
896 : edgomez 851 if (!BitstreamGetBit(bs)) // vop_coded
897 : Isibaar 3 {
898 : suxen_drol 252 DPRINTF(DPRINTF_HEADER, "vop_coded==false");
899 : Isibaar 3 return N_VOP;
900 :     }
901 :    
902 : edgomez 851 if (dec->newpred_enable)
903 :     {
904 :     int vop_id;
905 :     int vop_id_for_prediction;
906 :    
907 :     vop_id = BitstreamGetBits(bs, MIN(dec->time_inc_bits + 3, 15));
908 :     DPRINTF(DPRINTF_HEADER, "vop_id %i", vop_id);
909 :     if (BitstreamGetBit(bs)) /* vop_id_for_prediction_indication */
910 :     {
911 :     vop_id_for_prediction = BitstreamGetBits(bs, MIN(dec->time_inc_bits + 3, 15));
912 :     DPRINTF(DPRINTF_HEADER, "vop_id_for_prediction %i", vop_id_for_prediction);
913 :     }
914 :     READ_MARKER();
915 :     }
916 : Isibaar 3
917 : edgomez 851
918 :    
919 :     // fix a little bug by MinChen <chenm002@163.com>
920 : edgomez 195 if ((dec->shape != VIDOBJLAY_SHAPE_BINARY_ONLY) &&
921 : edgomez 851 ( (coding_type == P_VOP) || (coding_type == S_VOP && dec->sprite_enable == SPRITE_GMC) ) ) {
922 :     *rounding = BitstreamGetBit(bs); // rounding_type
923 : suxen_drol 252 DPRINTF(DPRINTF_HEADER, "rounding %i", *rounding);
924 : Isibaar 3 }
925 :    
926 : edgomez 851 if (dec->reduced_resolution_enable &&
927 :     dec->shape == VIDOBJLAY_SHAPE_RECTANGULAR &&
928 :     (coding_type == P_VOP || coding_type == I_VOP)) {
929 : Isibaar 3
930 : edgomez 851 *reduced_resolution = BitstreamGetBit(bs);
931 :     DPRINTF(DPRINTF_HEADER, "reduced_resolution %i", *reduced_resolution);
932 :     }
933 :     else
934 :     {
935 :     *reduced_resolution = 0;
936 :     }
937 :    
938 : edgomez 195 if (dec->shape != VIDOBJLAY_SHAPE_RECTANGULAR) {
939 : edgomez 851 if(!(dec->sprite_enable == SPRITE_STATIC && coding_type == I_VOP)) {
940 : edgomez 195
941 : edgomez 851 uint32_t width, height;
942 :     uint32_t horiz_mc_ref, vert_mc_ref;
943 : Isibaar 3
944 : edgomez 851 width = BitstreamGetBits(bs, 13);
945 :     READ_MARKER();
946 :     height = BitstreamGetBits(bs, 13);
947 :     READ_MARKER();
948 :     horiz_mc_ref = BitstreamGetBits(bs, 13);
949 :     READ_MARKER();
950 :     vert_mc_ref = BitstreamGetBits(bs, 13);
951 :     READ_MARKER();
952 : Isibaar 3
953 : edgomez 851 DPRINTF(DPRINTF_HEADER, "width %i", width);
954 :     DPRINTF(DPRINTF_HEADER, "height %i", height);
955 :     DPRINTF(DPRINTF_HEADER, "horiz_mc_ref %i", horiz_mc_ref);
956 :     DPRINTF(DPRINTF_HEADER, "vert_mc_ref %i", vert_mc_ref);
957 :     }
958 :    
959 :     BitstreamSkip(bs, 1); // change_conv_ratio_disable
960 :     if (BitstreamGetBit(bs)) // vop_constant_alpha
961 : Isibaar 3 {
962 : edgomez 851 BitstreamSkip(bs, 8); // vop_constant_alpha_value
963 : Isibaar 3 }
964 :     }
965 :    
966 : edgomez 851 if (dec->shape != VIDOBJLAY_SHAPE_BINARY_ONLY) {
967 : edgomez 195
968 : edgomez 851 if (!dec->complexity_estimation_disable)
969 :     {
970 :     read_vop_complexity_estimation_header(bs, dec, coding_type);
971 :     }
972 :    
973 :     // intra_dc_vlc_threshold
974 : edgomez 195 *intra_dc_threshold =
975 :     intra_dc_threshold_table[BitstreamGetBits(bs, 3)];
976 : Isibaar 3
977 : edgomez 851 dec->top_field_first = 0;
978 :     dec->alternate_vertical_scan = 0;
979 :    
980 : edgomez 195 if (dec->interlacing) {
981 : suxen_drol 252 dec->top_field_first = BitstreamGetBit(bs);
982 :     DPRINTF(DPRINTF_HEADER, "interlace top_field_first %i", dec->top_field_first);
983 :     dec->alternate_vertical_scan = BitstreamGetBit(bs);
984 :     DPRINTF(DPRINTF_HEADER, "interlace alternate_vertical_scan %i", dec->alternate_vertical_scan);
985 :    
986 : h 69 }
987 : Isibaar 3 }
988 : edgomez 195
989 : edgomez 851 if ((dec->sprite_enable == SPRITE_STATIC || dec->sprite_enable== SPRITE_GMC) && coding_type == S_VOP) {
990 :    
991 :     int i;
992 :    
993 :     for (i = 0 ; i < dec->sprite_warping_points; i++)
994 :     {
995 :     int length;
996 :     int x = 0, y = 0;
997 :    
998 :     /* sprite code borowed from ffmpeg; thx Michael Niedermayer <michaelni@gmx.at> */
999 :     length = bs_get_spritetrajectory(bs);
1000 :     if(length){
1001 :     x= BitstreamGetBits(bs, length);
1002 :     if ((x >> (length - 1)) == 0) /* if MSB not set it is negative*/
1003 :     x = - (x ^ ((1 << length) - 1));
1004 :     }
1005 :     READ_MARKER();
1006 :    
1007 :     length = bs_get_spritetrajectory(bs);
1008 :     if(length){
1009 :     y = BitstreamGetBits(bs, length);
1010 :     if ((y >> (length - 1)) == 0) /* if MSB not set it is negative*/
1011 :     y = - (y ^ ((1 << length) - 1));
1012 :     }
1013 :     READ_MARKER();
1014 :    
1015 :     gmc_warp->duv[i].x = x;
1016 :     gmc_warp->duv[i].y = y;
1017 :    
1018 :     DPRINTF(DPRINTF_HEADER,"sprite_warping_point[%i] xy=(%i,%i)", i, x, y);
1019 :     }
1020 :    
1021 :     if (dec->sprite_brightness_change)
1022 :     {
1023 :     // XXX: brightness_change_factor()
1024 :     }
1025 :     if (dec->sprite_enable == SPRITE_STATIC)
1026 :     {
1027 :     // XXX: todo
1028 :     }
1029 :    
1030 :     }
1031 :    
1032 :     if ((*quant = BitstreamGetBits(bs, dec->quant_bits)) < 1) // vop_quant
1033 : Isibaar 157 *quant = 1;
1034 : suxen_drol 252 DPRINTF(DPRINTF_HEADER, "quant %i", *quant);
1035 : edgomez 195
1036 :     if (coding_type != I_VOP) {
1037 : edgomez 851 *fcode_forward = BitstreamGetBits(bs, 3); // fcode_forward
1038 : suxen_drol 252 DPRINTF(DPRINTF_HEADER, "fcode_forward %i", *fcode_forward);
1039 : Isibaar 3 }
1040 : edgomez 195
1041 :     if (coding_type == B_VOP) {
1042 : edgomez 851 *fcode_backward = BitstreamGetBits(bs, 3); // fcode_backward
1043 : suxen_drol 252 DPRINTF(DPRINTF_HEADER, "fcode_backward %i", *fcode_backward);
1044 : Isibaar 3 }
1045 : edgomez 195 if (!dec->scalability) {
1046 :     if ((dec->shape != VIDOBJLAY_SHAPE_RECTANGULAR) &&
1047 :     (coding_type != I_VOP)) {
1048 : edgomez 851 BitstreamSkip(bs, 1); // vop_shape_coding_type
1049 : chenm001 156 }
1050 :     }
1051 : Isibaar 3 return coding_type;
1052 : suxen_drol 252
1053 : edgomez 195 } else if (start_code == USERDATA_START_CODE) {
1054 : edgomez 851 char tmp[256];
1055 :     int i, version, build;
1056 :     char packed;
1057 : suxen_drol 252
1058 : edgomez 851 BitstreamSkip(bs, 32); // user_data_start_code
1059 : suxen_drol 252
1060 : edgomez 851 tmp[0] = BitstreamShowBits(bs, 8);
1061 :    
1062 :     for(i = 1; i < 256; i++){
1063 :     tmp[i] = (BitstreamShowBits(bs, 16) & 0xFF);
1064 :    
1065 :     if(tmp[i] == 0)
1066 :     break;
1067 :    
1068 :     BitstreamSkip(bs, 8);
1069 :     }
1070 : suxen_drol 252
1071 : edgomez 851 DPRINTF(DPRINTF_STARTCODE, "<user_data>: %s\n", tmp);
1072 :    
1073 :     /* divx detection */
1074 :     i = sscanf(tmp, "DivX%dBuild%d%c", &version, &build, &packed);
1075 :     if (i < 2)
1076 :     i = sscanf(tmp, "DivX%db%d%c", &version, &build, &packed);
1077 :    
1078 :     if (i >= 2)
1079 :     {
1080 :     dec->packed_mode = (i == 3 && packed == 'p');
1081 :     DPRINTF(DPRINTF_HEADER, "divx version=%i, build=%i packed=%i",
1082 :     version, build, dec->packed_mode);
1083 :     }
1084 :    
1085 :     } else // start_code == ?
1086 : Isibaar 3 {
1087 : edgomez 195 if (BitstreamShowBits(bs, 24) == 0x000001) {
1088 : suxen_drol 252 DPRINTF(DPRINTF_STARTCODE, "<unknown: %x>", BitstreamShowBits(bs, 32));
1089 : Isibaar 3 }
1090 :     BitstreamSkip(bs, 8);
1091 :     }
1092 :     }
1093 :     while ((BitstreamPos(bs) >> 3) < bs->length);
1094 :    
1095 : edgomez 851 //DPRINTF("*** WARNING: no vop_start_code found");
1096 : edgomez 195 return -1; /* ignore it */
1097 : Isibaar 3 }
1098 :    
1099 :    
1100 :     /* write custom quant matrix */
1101 :    
1102 : edgomez 195 static void
1103 :     bs_put_matrix(Bitstream * bs,
1104 :     const int16_t * matrix)
1105 : Isibaar 3 {
1106 :     int i, j;
1107 :     const int last = matrix[scan_tables[0][63]];
1108 :    
1109 : suxen_drol 233 for (j = 63; j > 0 && matrix[scan_tables[0][j - 1]] == last; j--);
1110 : Isibaar 3
1111 : edgomez 195 for (i = 0; i <= j; i++) {
1112 : Isibaar 3 BitstreamPutBits(bs, matrix[scan_tables[0][i]], 8);
1113 :     }
1114 :    
1115 : edgomez 195 if (j < 63) {
1116 : Isibaar 3 BitstreamPutBits(bs, 0, 8);
1117 :     }
1118 :     }
1119 :    
1120 :    
1121 :     /*
1122 :     write vol header
1123 :     */
1124 : edgomez 195 void
1125 :     BitstreamWriteVolHeader(Bitstream * const bs,
1126 :     const MBParam * pParam,
1127 : edgomez 851 const FRAMEINFO * const frame)
1128 : Isibaar 3 {
1129 : edgomez 851 static const unsigned int vo_id = 0;
1130 :     static const unsigned int vol_id = 0;
1131 :     int vol_ver_id=1;
1132 :     int profile = 0x03; /* simple profile/level 3 */
1133 :    
1134 :     if ( pParam->m_quarterpel || (frame->global_flags & XVID_GMC) ||
1135 :     (pParam->global & XVID_GLOBAL_REDUCED))
1136 :     vol_ver_id = 2;
1137 :    
1138 :     if ((pParam->global & XVID_GLOBAL_REDUCED))
1139 :     profile = 0x93; /* advanced realtime simple profile/level 3 */
1140 :    
1141 :     if (pParam->m_quarterpel || (frame->global_flags & XVID_GMC))
1142 :     profile = 0xf3; /* advanced simple profile/level 2 */
1143 :    
1144 :     // visual_object_sequence_start_code
1145 :     // BitstreamPad(bs);
1146 :     /* no padding here, anymore. You have to make sure that you are
1147 :     byte aligned, and that always 1-8 padding bits have been written */
1148 :    
1149 :     BitstreamPutBits(bs, VISOBJSEQ_START_CODE, 32);
1150 :     BitstreamPutBits(bs, profile, 8);
1151 :    
1152 :     // visual_object_start_code
1153 : edgomez 195 BitstreamPad(bs);
1154 : edgomez 851 BitstreamPutBits(bs, VISOBJ_START_CODE, 32);
1155 :     BitstreamPutBits(bs, 0, 1); // is_visual_object_identifier
1156 :     BitstreamPutBits(bs, VISOBJ_TYPE_VIDEO, 4); // visual_object_type
1157 :    
1158 :     // video object_start_code & vo_id
1159 :     BitstreamPad(bs);
1160 :     BitstreamPutBits(bs, VIDOBJ_START_CODE|(vo_id&0x5), 32);
1161 : Isibaar 3
1162 : edgomez 851 // video_object_layer_start_code & vol_id
1163 :     BitstreamPad(bs);
1164 :     BitstreamPutBits(bs, VIDOBJLAY_START_CODE|(vol_id&0x4), 32);
1165 : Isibaar 3
1166 : edgomez 851 BitstreamPutBit(bs, 0); // random_accessible_vol
1167 :     BitstreamPutBits(bs, 0, 8); // video_object_type_indication
1168 : suxen_drol 164
1169 : edgomez 851 if (vol_ver_id == 1)
1170 :     {
1171 :     BitstreamPutBit(bs, 0); // is_object_layer_identified (0=not given)
1172 :     }
1173 :     else
1174 :     {
1175 :     BitstreamPutBit(bs, 1); // is_object_layer_identified
1176 :     BitstreamPutBits(bs, vol_ver_id, 4); // vol_ver_id == 2
1177 :     BitstreamPutBits(bs, 4, 3); // vol_ver_priority (1==lowest, 7==highest) ??
1178 :     }
1179 : chl 387
1180 : edgomez 851 BitstreamPutBits(bs, 1, 4); // aspect_ratio_info (1=1:1)
1181 : edgomez 487
1182 : edgomez 851 BitstreamPutBit(bs, 1); // vol_control_parameters
1183 :     BitstreamPutBits(bs, 1, 2); // chroma_format 1="4:2:0"
1184 : suxen_drol 164
1185 : edgomez 851 if (pParam->max_bframes > 0) {
1186 :     BitstreamPutBit(bs, 0); // low_delay
1187 :     } else
1188 :     {
1189 :     BitstreamPutBit(bs, 1); // low_delay
1190 :     }
1191 :     BitstreamPutBit(bs, 0); // vbv_parameters (0=not given)
1192 : Isibaar 3
1193 : edgomez 851 BitstreamPutBits(bs, 0, 2); // video_object_layer_shape (0=rectangular)
1194 :    
1195 : Isibaar 3 WRITE_MARKER();
1196 : edgomez 195
1197 : edgomez 851 /* time_inc_resolution; ignored by current decore versions
1198 :     eg. 2fps res=2 inc=1
1199 :     25fps res=25 inc=1
1200 :     29.97fps res=30000 inc=1001
1201 : edgomez 195 */
1202 : suxen_drol 163 BitstreamPutBits(bs, pParam->fbase, 16);
1203 : Isibaar 3
1204 :     WRITE_MARKER();
1205 :    
1206 : edgomez 851 BitstreamPutBit(bs, 1); // fixed_vop_rate = 1
1207 :     BitstreamPutBits(bs, pParam->fincr, log2bin(pParam->fbase)); // fixed_vop_time_increment
1208 : Isibaar 3
1209 :     WRITE_MARKER();
1210 : edgomez 851 BitstreamPutBits(bs, pParam->width, 13); // width
1211 : Isibaar 3 WRITE_MARKER();
1212 : edgomez 851 BitstreamPutBits(bs, pParam->height, 13); // height
1213 : Isibaar 3 WRITE_MARKER();
1214 : edgomez 195
1215 : edgomez 851 BitstreamPutBit(bs, frame->global_flags & XVID_INTERLACING); // interlace
1216 :     BitstreamPutBit(bs, 1); // obmc_disable (overlapped block motion compensation)
1217 : Isibaar 3
1218 : edgomez 851 if (vol_ver_id != 1)
1219 :     { if (frame->global_flags & XVID_GMC)
1220 :     { BitstreamPutBits(bs, 2, 2); // sprite_enable=='GMC'
1221 :     BitstreamPutBits(bs, 2, 6); // no_of_sprite_warping_points
1222 :     BitstreamPutBits(bs, 3, 2); // sprite_warping_accuracy 0==1/2, 1=1/4, 2=1/8, 3=1/16
1223 :     BitstreamPutBit(bs, 0); // sprite_brightness_change (not supported)
1224 :    
1225 :     /* currently we use no_of_sprite_warping_points==2, sprite_warping_accuracy==3
1226 :     for DivX5 compatability */
1227 :    
1228 :     } else
1229 :     BitstreamPutBits(bs, 0, 2); // sprite_enable==off
1230 :     }
1231 :     else
1232 :     BitstreamPutBit(bs, 0); // sprite_enable==off
1233 :    
1234 :     BitstreamPutBit(bs, 0); // not_8_bit
1235 :    
1236 :     // quant_type 0=h.263 1=mpeg4(quantizer tables)
1237 : suxen_drol 136 BitstreamPutBit(bs, pParam->m_quant_type);
1238 : edgomez 195
1239 :     if (pParam->m_quant_type) {
1240 : edgomez 851 BitstreamPutBit(bs, get_intra_matrix_status()); // load_intra_quant_mat
1241 : edgomez 195 if (get_intra_matrix_status()) {
1242 : Isibaar 4 bs_put_matrix(bs, get_intra_matrix());
1243 : Isibaar 3 }
1244 :    
1245 : edgomez 851 BitstreamPutBit(bs, get_inter_matrix_status()); // load_inter_quant_mat
1246 : edgomez 195 if (get_inter_matrix_status()) {
1247 : Isibaar 4 bs_put_matrix(bs, get_inter_matrix());
1248 : Isibaar 3 }
1249 :    
1250 :     }
1251 :    
1252 : edgomez 851 if (vol_ver_id != 1) {
1253 :     if (pParam->m_quarterpel)
1254 :     BitstreamPutBit(bs, 1); // quarterpel
1255 :     else
1256 :     BitstreamPutBit(bs, 0); // no quarterpel
1257 :     }
1258 :    
1259 :     BitstreamPutBit(bs, 1); // complexity_estimation_disable
1260 :     BitstreamPutBit(bs, 1); // resync_marker_disable
1261 :     BitstreamPutBit(bs, 0); // data_partitioned
1262 :    
1263 :     if (vol_ver_id != 1)
1264 :     {
1265 :     BitstreamPutBit(bs, 0); // newpred_enable
1266 :    
1267 :     BitstreamPutBit(bs, (pParam->global & XVID_GLOBAL_REDUCED)?1:0);
1268 :     /* reduced_resolution_vop_enabled */
1269 :     }
1270 :    
1271 :     BitstreamPutBit(bs, 0); // scalability
1272 :    
1273 :     /* fake divx5 id, to ensure compatibility with divx5 decoder */
1274 :     #define DIVX5_ID "DivX501b481p"
1275 :     if (pParam->max_bframes > 0 && (pParam->global & XVID_GLOBAL_PACKED)) {
1276 :     BitstreamWriteUserData(bs, DIVX5_ID, strlen(DIVX5_ID));
1277 :     }
1278 :    
1279 :     /* xvid id */
1280 :     #define XVID_ID "XviD" XVID_BS_VERSION
1281 :     BitstreamWriteUserData(bs, XVID_ID, strlen(XVID_ID));
1282 : Isibaar 3 }
1283 :    
1284 :    
1285 :     /*
1286 :     write vop header
1287 :     */
1288 : edgomez 195 void
1289 : edgomez 851 BitstreamWriteVopHeader(
1290 :     Bitstream * const bs,
1291 : edgomez 195 const MBParam * pParam,
1292 : edgomez 851 const FRAMEINFO * const frame,
1293 : suxen_drol 229 int vop_coded)
1294 : Isibaar 3 {
1295 : suxen_drol 152 uint32_t i;
1296 : chl 387
1297 : edgomez 851 // BitstreamPad(bs);
1298 :     /* no padding here, anymore. You have to make sure that you are
1299 :     byte aligned, and that always 1-8 padding bits have been written */
1300 :    
1301 : edgomez 195 BitstreamPutBits(bs, VOP_START_CODE, 32);
1302 : Isibaar 3
1303 : edgomez 195 BitstreamPutBits(bs, frame->coding_type, 2);
1304 : edgomez 851 DPRINTF(DPRINTF_HEADER, "coding_type = %i", frame->coding_type);
1305 : edgomez 195
1306 :     for (i = 0; i < frame->seconds; i++) {
1307 : suxen_drol 152 BitstreamPutBit(bs, 1);
1308 :     }
1309 :     BitstreamPutBit(bs, 0);
1310 : Isibaar 3
1311 :     WRITE_MARKER();
1312 :    
1313 : edgomez 851 // time_increment: value=nth_of_sec, nbits = log2(resolution)
1314 :    
1315 : edgomez 195 BitstreamPutBits(bs, frame->ticks, log2bin(pParam->fbase));
1316 : edgomez 851 /*DPRINTF("[%i:%i] %c", frame->seconds, frame->ticks,
1317 :     frame->coding_type == I_VOP ? 'I' : frame->coding_type ==
1318 :     P_VOP ? 'P' : 'B');*/
1319 : Isibaar 3
1320 :     WRITE_MARKER();
1321 :    
1322 : suxen_drol 229 if (!vop_coded) {
1323 :     BitstreamPutBits(bs, 0, 1);
1324 :     return;
1325 :     }
1326 :    
1327 : edgomez 851 BitstreamPutBits(bs, 1, 1); // vop_coded
1328 : Isibaar 3
1329 : edgomez 851 if ( (frame->coding_type == P_VOP) || (frame->coding_type == S_VOP) )
1330 : suxen_drol 136 BitstreamPutBits(bs, frame->rounding_type, 1);
1331 : Isibaar 3
1332 : edgomez 851 if ((pParam->global & XVID_GLOBAL_REDUCED))
1333 :     BitstreamPutBit(bs, (frame->global_flags & XVID_REDUCED)?1:0);
1334 : edgomez 195
1335 : edgomez 851 BitstreamPutBits(bs, 0, 3); // intra_dc_vlc_threshold
1336 :    
1337 : edgomez 195 if (frame->global_flags & XVID_INTERLACING) {
1338 : edgomez 851 BitstreamPutBit(bs, (frame->global_flags & XVID_TOPFIELDFIRST));
1339 :     BitstreamPutBit(bs, (frame->global_flags & XVID_ALTERNATESCAN));
1340 : h 69 }
1341 : edgomez 851
1342 :     if (frame->coding_type == S_VOP) {
1343 :     if (1) { // no_of_sprite_warping_points>=1 (we use 2!)
1344 :     int k;
1345 :     for (k=0;k<2;k++)
1346 :     {
1347 :     bs_put_spritetrajectory(bs, frame->warp.duv[k].x ); // du[k]
1348 :     WRITE_MARKER();
1349 :    
1350 :     bs_put_spritetrajectory(bs, frame->warp.duv[k].y ); // dv[k]
1351 :     WRITE_MARKER();
1352 : h 69
1353 : edgomez 851 if (pParam->m_quarterpel)
1354 :     {
1355 :     DPRINTF(DPRINTF_HEADER,"sprite_warping_point[%i] xy=(%i,%i) *QPEL*", k, frame->warp.duv[k].x/2, frame->warp.duv[k].y/2);
1356 :     }
1357 :     else
1358 :     {
1359 :     DPRINTF(DPRINTF_HEADER,"sprite_warping_point[%i] xy=(%i,%i)", k, frame->warp.duv[k].x, frame->warp.duv[k].y);
1360 :     }
1361 :     }
1362 :     }
1363 :     }
1364 :    
1365 : edgomez 195
1366 : edgomez 851 DPRINTF(DPRINTF_HEADER, "quant = %i", frame->quant);
1367 :    
1368 :     BitstreamPutBits(bs, frame->quant, 5); // quantizer
1369 :    
1370 : suxen_drol 136 if (frame->coding_type != I_VOP)
1371 : edgomez 851 BitstreamPutBits(bs, frame->fcode, 3); // forward_fixed_code
1372 : suxen_drol 152
1373 :     if (frame->coding_type == B_VOP)
1374 : edgomez 851 BitstreamPutBits(bs, frame->bcode, 3); // backward_fixed_code
1375 : suxen_drol 152
1376 : Isibaar 3 }
1377 : edgomez 851
1378 :     void
1379 :     BitstreamWriteUserData(Bitstream * const bs,
1380 :     uint8_t * data,
1381 :     const int length)
1382 :     {
1383 :     int i;
1384 :    
1385 :     BitstreamPad(bs);
1386 :     BitstreamPutBits(bs, USERDATA_START_CODE, 32);
1387 :    
1388 :     for (i = 0; i < length; i++) {
1389 :     BitstreamPutBits(bs, data[i], 8);
1390 :     }
1391 :    
1392 :     }

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