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1 : Isibaar 3 /******************************************************************************
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 :    
30 :     /******************************************************************************
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 : chenm001 223 * *
42 : Isibaar 3 * Revision history: *
43 : chenm001 223 * *
44 : chl 619 * 28.10.2002 GMC support - gruel *
45 : Isibaar 579 * 04.10.2002 qpel support - Isibaar *
46 : chenm001 294 * 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 : suxen_drol 229 * 20.05.2002 added BitstreamWriteUserData *
51 : Isibaar 579 * 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 : suxen_drol 164 * 06.05.2002 low_delay *
56 : suxen_drol 163 * 06.05.2002 fixed fincr/fbase error *
57 :     * 01.05.2002 added BVOP support to BitstreamWriteVopHeader *
58 : chenm001 124 * 15.04.2002 rewrite log2bin use asm386 By MinChen <chenm001@163.com> *
59 : chenm001 223 * 26.03.2002 interlacing support *
60 :     * 03.03.2002 qmatrix writing *
61 :     * 03.03.2002 merged BITREADER and BITWRITER *
62 : Isibaar 579 * 30.02.2002 intra_dc_threshold support *
63 :     * 04.12.2001 support for additional headers *
64 :     * 16.12.2001 inital version *
65 :     * *
66 : Isibaar 3 ******************************************************************************/
67 :    
68 :    
69 : Isibaar 645 #include <string.h>
70 : suxen_drol 721 #include <stdio.h>
71 :    
72 : Isibaar 3 #include "bitstream.h"
73 :     #include "zigzag.h"
74 : Isibaar 4 #include "../quant/quant_matrix.h"
75 : chl 619 #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 707 #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 : chenm001 223 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 :     // for PVOP addbits == fcode - 1
134 :     // for BVOP addbits == max(fcode,bcode) - 1
135 :     // returns mbpos
136 :     int
137 : suxen_drol 631 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 : suxen_drol 631 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 : suxen_drol 631 int hec = 0;
149 : suxen_drol 248
150 :     BitstreamSkip(bs, BitstreamNumBitsToByteAlign(bs));
151 : suxen_drol 631 BitstreamSkip(bs, startcode_bits);
152 : suxen_drol 248
153 : suxen_drol 252 DPRINTF(DPRINTF_STARTCODE, "<video_packet_header>");
154 :    
155 : suxen_drol 631 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 : suxen_drol 631 mbnum = BitstreamGetBits(bs, mbnum_bits); /* macroblock_number */
172 : suxen_drol 252 DPRINTF(DPRINTF_HEADER, "mbnum %i", mbnum);
173 : suxen_drol 248
174 : suxen_drol 631 if (dec->shape != VIDOBJLAY_SHAPE_BINARY_ONLY)
175 :     {
176 : suxen_drol 727 *quant = BitstreamGetBits(bs, dec->quant_bits); /* quant_scale */
177 : suxen_drol 631 DPRINTF(DPRINTF_HEADER, "quant %i", *quant);
178 :     }
179 : suxen_drol 248
180 : suxen_drol 631 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 : suxen_drol 631 if (hec)
186 :     {
187 :     int time_base;
188 :     int time_increment;
189 :     int coding_type;
190 : suxen_drol 248
191 : suxen_drol 631 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 : suxen_drol 694 BitstreamSkip(bs, 1); /* XXX: vop_reduced_resolution */
222 : suxen_drol 631 }
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 : suxen_drol 694
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 : suxen_drol 727 if (e->method == 0 || e->method == 1)
330 : suxen_drol 694 {
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 : suxen_drol 631 uint32_t * reduced_resolution,
431 : edgomez 195 uint32_t * quant,
432 :     uint32_t * fcode_forward,
433 :     uint32_t * fcode_backward,
434 : suxen_drol 631 uint32_t * intra_dc_threshold,
435 :     VECTOR * gmc_mv)
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 :     int32_t time_increment;
442 : suxen_drol 631 int resize = 0;
443 : chenm001 156
444 : edgomez 195 do {
445 : suxen_drol 631
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 195 BitstreamSkip(bs, 32); // visual_object_sequence_start_code
456 : suxen_drol 252 profile = BitstreamGetBits(bs, 8); // profile_and_level_indication
457 :    
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 195 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 : suxen_drol 746 int visobj_ver_id;
468 : suxen_drol 252
469 :     DPRINTF(DPRINTF_STARTCODE, "<visual_object>");
470 :    
471 : edgomez 195 BitstreamSkip(bs, 32); // visual_object_start_code
472 :     if (BitstreamGetBit(bs)) // is_visual_object_identified
473 : Isibaar 3 {
474 : suxen_drol 746 visobj_ver_id = BitstreamGetBits(bs, 4); // visual_object_ver_id
475 : suxen_drol 252 DPRINTF(DPRINTF_HEADER,"ver_id %i", vol_ver_id);
476 : edgomez 195 BitstreamSkip(bs, 3); // visual_object_priority
477 :     } else {
478 : suxen_drol 746 visobj_ver_id = 1;
479 : Isibaar 3 }
480 :    
481 :     if (BitstreamShowBits(bs, 4) != VISOBJ_TYPE_VIDEO) // visual_object_type
482 :     {
483 : suxen_drol 252 DPRINTF(DPRINTF_ERROR, "visual_object_type != video");
484 : Isibaar 3 return -1;
485 :     }
486 :     BitstreamSkip(bs, 4);
487 :    
488 :     // video_signal_type
489 :    
490 : edgomez 195 if (BitstreamGetBit(bs)) // video_signal_type
491 : Isibaar 3 {
492 : suxen_drol 252 DPRINTF(DPRINTF_HEADER,"+ video_signal_type");
493 : edgomez 195 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 195 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 195 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 195 BitstreamSkip(bs, 32); // video_object_layer_start_code
516 : Isibaar 3
517 : edgomez 195 BitstreamSkip(bs, 1); // random_accessible_vol
518 : Isibaar 3
519 :     // video_object_type_indication
520 : suxen_drol 631 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 195 if (BitstreamGetBit(bs)) // is_object_layer_identifier
535 : Isibaar 3 {
536 : suxen_drol 252 DPRINTF(DPRINTF_HEADER, "+ is_object_layer_identifier");
537 : edgomez 195 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 195 BitstreamSkip(bs, 3); // video_object_layer_priority
540 :     } else {
541 : Isibaar 3 vol_ver_id = 1;
542 :     }
543 :    
544 : suxen_drol 631 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 : suxen_drol 631 dec->par_width = BitstreamGetBits(bs, 8); // par_width
550 :     dec->par_height = BitstreamGetBits(bs, 8); // par_height
551 : Isibaar 3 }
552 :    
553 : edgomez 195 if (BitstreamGetBit(bs)) // vol_control_parameters
554 : Isibaar 3 {
555 : suxen_drol 252 DPRINTF(DPRINTF_HEADER, "+ vol_control_parameters");
556 : edgomez 195 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 195 if (BitstreamGetBit(bs)) // vbv_parameters
560 : Isibaar 3 {
561 : suxen_drol 252 DPRINTF(DPRINTF_HEADER,"+ vbv_parameters");
562 : edgomez 195 BitstreamSkip(bs, 15); // first_half_bitrate
563 : Isibaar 3 READ_MARKER();
564 : edgomez 195 BitstreamSkip(bs, 15); // latter_half_bitrate
565 : Isibaar 3 READ_MARKER();
566 : edgomez 195 BitstreamSkip(bs, 15); // first_half_vbv_buffer_size
567 : Isibaar 3 READ_MARKER();
568 : edgomez 195 BitstreamSkip(bs, 3); // latter_half_vbv_buffer_size
569 :     BitstreamSkip(bs, 11); // first_half_vbv_occupancy
570 : Isibaar 3 READ_MARKER();
571 : edgomez 195 BitstreamSkip(bs, 15); // latter_half_vbv_occupancy
572 : Isibaar 3 READ_MARKER();
573 :     }
574 : suxen_drol 707 }else{
575 :     dec->low_delay = dec->low_delay_default;
576 : Isibaar 3 }
577 :    
578 :     dec->shape = BitstreamGetBits(bs, 2); // video_object_layer_shape
579 : suxen_drol 631
580 : suxen_drol 252 DPRINTF(DPRINTF_HEADER, "shape %i", dec->shape);
581 : suxen_drol 631 if (dec->shape != VIDOBJLAY_SHAPE_RECTANGULAR)
582 :     {
583 :     DPRINTF(DPRINTF_ERROR,"non-rectangular shapes are not supported");
584 :     }
585 : edgomez 195
586 :     if (dec->shape == VIDOBJLAY_SHAPE_GRAYSCALE && vol_ver_id != 1) {
587 :     BitstreamSkip(bs, 4); // video_object_layer_shape_extension
588 : Isibaar 3 }
589 :    
590 :     READ_MARKER();
591 :    
592 : chenm001 156 // *************************** for decode B-frame time ***********************
593 : suxen_drol 631 dec->time_inc_resolution = BitstreamGetBits(bs, 16); // vop_time_increment_resolution
594 :     DPRINTF(DPRINTF_HEADER,"vop_time_increment_resolution %i", dec->time_inc_resolution);
595 : suxen_drol 252
596 : suxen_drol 631 // dec->time_inc_resolution--;
597 : suxen_drol 252
598 : suxen_drol 631 if (dec->time_inc_resolution > 0) {
599 :     dec->time_inc_bits = log2bin(dec->time_inc_resolution-1);
600 : edgomez 195 } else {
601 : Isibaar 3 // dec->time_inc_bits = 0;
602 :     // for "old" xvid compatibility, set time_inc_bits = 1
603 :     dec->time_inc_bits = 1;
604 :     }
605 :    
606 :     READ_MARKER();
607 :    
608 : edgomez 195 if (BitstreamGetBit(bs)) // fixed_vop_rate
609 : Isibaar 3 {
610 : suxen_drol 252 DPRINTF(DPRINTF_HEADER, "+ fixed_vop_rate");
611 : Isibaar 3 BitstreamSkip(bs, dec->time_inc_bits); // fixed_vop_time_increment
612 :     }
613 :    
614 : edgomez 195 if (dec->shape != VIDOBJLAY_SHAPE_BINARY_ONLY) {
615 : Isibaar 3
616 : edgomez 195 if (dec->shape == VIDOBJLAY_SHAPE_RECTANGULAR) {
617 : Isibaar 3 uint32_t width, height;
618 :    
619 :     READ_MARKER();
620 : edgomez 195 width = BitstreamGetBits(bs, 13); // video_object_layer_width
621 : Isibaar 3 READ_MARKER();
622 : edgomez 195 height = BitstreamGetBits(bs, 13); // video_object_layer_height
623 : Isibaar 3 READ_MARKER();
624 :    
625 : suxen_drol 252 DPRINTF(DPRINTF_HEADER, "width %i", width);
626 :     DPRINTF(DPRINTF_HEADER, "height %i", height);
627 :    
628 : suxen_drol 631 if (dec->width != width || dec->height != height)
629 :     {
630 :     if (dec->fixed_dimensions)
631 :     {
632 :     DPRINTF(DPRINTF_ERROR, "XVID_DEC_PARAM width/height does not match bitstream");
633 :     return -1;
634 :     }
635 :     resize = 1;
636 : chenm001 294 dec->width = width;
637 :     dec->height = height;
638 : Isibaar 3 }
639 :     }
640 : h 69
641 : suxen_drol 252 dec->interlacing = BitstreamGetBit(bs);
642 : suxen_drol 631 DPRINTF(DPRINTF_HEADER, "interlacing %i", dec->interlacing);
643 : Isibaar 3
644 : edgomez 195 if (!BitstreamGetBit(bs)) // obmc_disable
645 : Isibaar 3 {
646 : suxen_drol 252 DPRINTF(DPRINTF_ERROR, "obmc_disabled==false not supported");
647 : Isibaar 3 // TODO
648 :     // fucking divx4.02 has this enabled
649 :     }
650 :    
651 : suxen_drol 631 dec->sprite_enable = BitstreamGetBits(bs, (vol_ver_id == 1 ? 1 : 2)); // sprite_enable
652 :    
653 :     if (dec->sprite_enable == SPRITE_STATIC || dec->sprite_enable == SPRITE_GMC)
654 : Isibaar 3 {
655 : suxen_drol 631 int low_latency_sprite_enable;
656 :    
657 :     if (dec->sprite_enable != SPRITE_GMC)
658 :     {
659 :     int sprite_width;
660 :     int sprite_height;
661 :     int sprite_left_coord;
662 :     int sprite_top_coord;
663 :     sprite_width = BitstreamGetBits(bs, 13); // sprite_width
664 :     READ_MARKER();
665 :     sprite_height = BitstreamGetBits(bs, 13); // sprite_height
666 :     READ_MARKER();
667 :     sprite_left_coord = BitstreamGetBits(bs, 13); // sprite_left_coordinate
668 :     READ_MARKER();
669 :     sprite_top_coord = BitstreamGetBits(bs, 13); // sprite_top_coordinate
670 :     READ_MARKER();
671 :     }
672 :     dec->sprite_warping_points = BitstreamGetBits(bs, 6); // no_of_sprite_warping_points
673 :     dec->sprite_warping_accuracy = BitstreamGetBits(bs, 2); // sprite_warping_accuracy
674 :     dec->sprite_brightness_change = BitstreamGetBits(bs, 1); // brightness_change
675 :     if (dec->sprite_enable != SPRITE_GMC)
676 :     {
677 :     low_latency_sprite_enable = BitstreamGetBits(bs, 1); // low_latency_sprite_enable
678 :     }
679 : Isibaar 3 }
680 : edgomez 195
681 :     if (vol_ver_id != 1 &&
682 :     dec->shape != VIDOBJLAY_SHAPE_RECTANGULAR) {
683 :     BitstreamSkip(bs, 1); // sadct_disable
684 : Isibaar 3 }
685 :    
686 : edgomez 195 if (BitstreamGetBit(bs)) // not_8_bit
687 : Isibaar 3 {
688 : suxen_drol 252 DPRINTF(DPRINTF_HEADER, "not_8_bit==true (ignored)");
689 : Isibaar 3 dec->quant_bits = BitstreamGetBits(bs, 4); // quant_precision
690 : edgomez 195 BitstreamSkip(bs, 4); // bits_per_pixel
691 :     } else {
692 : Isibaar 3 dec->quant_bits = 5;
693 :     }
694 :    
695 : edgomez 195 if (dec->shape == VIDOBJLAY_SHAPE_GRAYSCALE) {
696 :     BitstreamSkip(bs, 1); // no_gray_quant_update
697 :     BitstreamSkip(bs, 1); // composition_method
698 :     BitstreamSkip(bs, 1); // linear_composition
699 : Isibaar 3 }
700 :    
701 : edgomez 195 dec->quant_type = BitstreamGetBit(bs); // quant_type
702 : suxen_drol 252 DPRINTF(DPRINTF_HEADER, "quant_type %i", dec->quant_type);
703 : Isibaar 3
704 : edgomez 195 if (dec->quant_type) {
705 :     if (BitstreamGetBit(bs)) // load_intra_quant_mat
706 : Isibaar 3 {
707 : Isibaar 20 uint8_t matrix[64];
708 : edgomez 195
709 : suxen_drol 252 DPRINTF(DPRINTF_HEADER, "load_intra_quant_mat");
710 :    
711 : Isibaar 4 bs_get_matrix(bs, matrix);
712 :     set_intra_matrix(matrix);
713 : edgomez 195 } else
714 : Isibaar 20 set_intra_matrix(get_default_intra_matrix());
715 : Isibaar 4
716 : edgomez 195 if (BitstreamGetBit(bs)) // load_inter_quant_mat
717 : Isibaar 3 {
718 : edgomez 195 uint8_t matrix[64];
719 : suxen_drol 252
720 :     DPRINTF(DPRINTF_HEADER, "load_inter_quant_mat");
721 : edgomez 195
722 : Isibaar 4 bs_get_matrix(bs, matrix);
723 :     set_inter_matrix(matrix);
724 : edgomez 195 } else
725 : Isibaar 20 set_inter_matrix(get_default_inter_matrix());
726 : Isibaar 3
727 : edgomez 195 if (dec->shape == VIDOBJLAY_SHAPE_GRAYSCALE) {
728 : suxen_drol 252 DPRINTF(DPRINTF_ERROR, "greyscale matrix not supported");
729 : Isibaar 3 return -1;
730 :     }
731 : Isibaar 4
732 : Isibaar 3 }
733 :    
734 : edgomez 195
735 :     if (vol_ver_id != 1) {
736 : Isibaar 333 dec->quarterpel = BitstreamGetBit(bs); // quarter_sample
737 : suxen_drol 631 DPRINTF(DPRINTF_HEADER,"quarterpel %i", dec->quarterpel);
738 : Isibaar 3 }
739 : Isibaar 333 else
740 :     dec->quarterpel = 0;
741 :    
742 : Isibaar 3
743 : suxen_drol 694 dec->complexity_estimation_disable = BitstreamGetBit(bs); /* complexity estimation disable */
744 :     if (!dec->complexity_estimation_disable)
745 : Isibaar 3 {
746 : suxen_drol 694 read_vol_complexity_estimation_header(bs, dec);
747 : Isibaar 3 }
748 :    
749 : suxen_drol 252 BitstreamSkip(bs, 1); // resync_marker_disable
750 : Isibaar 3
751 : edgomez 195 if (BitstreamGetBit(bs)) // data_partitioned
752 : Isibaar 3 {
753 : suxen_drol 252 DPRINTF(DPRINTF_ERROR, "data_partitioned not supported");
754 : edgomez 195 BitstreamSkip(bs, 1); // reversible_vlc
755 : Isibaar 3 }
756 :    
757 : edgomez 195 if (vol_ver_id != 1) {
758 : suxen_drol 631 dec->newpred_enable = BitstreamGetBit(bs);
759 :     if (dec->newpred_enable) // newpred_enable
760 : Isibaar 3 {
761 : suxen_drol 252 DPRINTF(DPRINTF_HEADER, "+ newpred_enable");
762 : edgomez 195 BitstreamSkip(bs, 2); // requested_upstream_message_type
763 :     BitstreamSkip(bs, 1); // newpred_segment_type
764 : Isibaar 3 }
765 : suxen_drol 694 dec->reduced_resolution_enable = BitstreamGetBit(bs); /* reduced_resolution_vop_enable */
766 :     DPRINTF(DPRINTF_HEADER, "reduced_resolution_enable %i", dec->reduced_resolution_enable);
767 : Isibaar 3 }
768 : suxen_drol 631 else
769 :     {
770 :     dec->newpred_enable = 0;
771 :     dec->reduced_resolution_enable = 0;
772 :     }
773 : edgomez 195
774 : suxen_drol 694 dec->scalability = BitstreamGetBit(bs); /* scalability */
775 :     if (dec->scalability)
776 : Isibaar 3 {
777 : suxen_drol 252 DPRINTF(DPRINTF_ERROR, "scalability not supported");
778 : suxen_drol 694 BitstreamSkip(bs, 1); /* hierarchy_type */
779 :     BitstreamSkip(bs, 4); /* ref_layer_id */
780 :     BitstreamSkip(bs, 1); /* ref_layer_sampling_direc */
781 :     BitstreamSkip(bs, 5); /* hor_sampling_factor_n */
782 :     BitstreamSkip(bs, 5); /* hor_sampling_factor_m */
783 :     BitstreamSkip(bs, 5); /* vert_sampling_factor_n */
784 :     BitstreamSkip(bs, 5); /* vert_sampling_factor_m */
785 :     BitstreamSkip(bs, 1); /* enhancement_type */
786 :     if(dec->shape == VIDOBJLAY_SHAPE_BINARY /* && hierarchy_type==0 */) {
787 :     BitstreamSkip(bs, 1); /* use_ref_shape */
788 :     BitstreamSkip(bs, 1); /* use_ref_texture */
789 :     BitstreamSkip(bs, 5); /* shape_hor_sampling_factor_n */
790 :     BitstreamSkip(bs, 5); /* shape_hor_sampling_factor_m */
791 :     BitstreamSkip(bs, 5); /* shape_vert_sampling_factor_n */
792 :     BitstreamSkip(bs, 5); /* shape_vert_sampling_factor_m */
793 :     }
794 : Isibaar 3 return -1;
795 :     }
796 : edgomez 195 } else // dec->shape == BINARY_ONLY
797 : Isibaar 3 {
798 : edgomez 195 if (vol_ver_id != 1) {
799 : suxen_drol 694 dec->scalability = BitstreamGetBit(bs); /* scalability */
800 :     if (dec->scalability)
801 : Isibaar 3 {
802 : suxen_drol 694 DPRINTF(DPRINTF_ERROR, "scalability not supported");
803 :     BitstreamSkip(bs, 4); /* ref_layer_id */
804 :     BitstreamSkip(bs, 5); /* hor_sampling_factor_n */
805 :     BitstreamSkip(bs, 5); /* hor_sampling_factor_m */
806 :     BitstreamSkip(bs, 5); /* vert_sampling_factor_n */
807 :     BitstreamSkip(bs, 5); /* vert_sampling_factor_m */
808 : Isibaar 3 return -1;
809 :     }
810 :     }
811 : edgomez 195 BitstreamSkip(bs, 1); // resync_marker_disable
812 : Isibaar 3
813 :     }
814 :    
815 : suxen_drol 631 return (resize ? -3 : -2 ); /* VOL */
816 :    
817 : edgomez 195 } else if (start_code == GRPOFVOP_START_CODE) {
818 : suxen_drol 252
819 :     DPRINTF(DPRINTF_STARTCODE, "<group_of_vop>");
820 :    
821 : Isibaar 3 BitstreamSkip(bs, 32);
822 :     {
823 :     int hours, minutes, seconds;
824 : edgomez 195
825 : Isibaar 3 hours = BitstreamGetBits(bs, 5);
826 :     minutes = BitstreamGetBits(bs, 6);
827 :     READ_MARKER();
828 :     seconds = BitstreamGetBits(bs, 6);
829 : suxen_drol 252
830 :     DPRINTF(DPRINTF_HEADER, "time %ih%im%is", hours);
831 : Isibaar 3 }
832 : edgomez 195 BitstreamSkip(bs, 1); // closed_gov
833 :     BitstreamSkip(bs, 1); // broken_link
834 : suxen_drol 252
835 : edgomez 195 } else if (start_code == VOP_START_CODE) {
836 : suxen_drol 252
837 :     DPRINTF(DPRINTF_STARTCODE, "<vop>");
838 :    
839 : edgomez 195 BitstreamSkip(bs, 32); // vop_start_code
840 : Isibaar 3
841 : edgomez 195 coding_type = BitstreamGetBits(bs, 2); // vop_coding_type
842 : suxen_drol 252 DPRINTF(DPRINTF_HEADER, "coding_type %i", coding_type);
843 : Isibaar 3
844 : chenm001 156 // *************************** for decode B-frame time ***********************
845 : edgomez 195 while (BitstreamGetBit(bs) != 0) // time_base
846 : chenm001 156 time_incr++;
847 : edgomez 195
848 : Isibaar 3 READ_MARKER();
849 : edgomez 195
850 :     if (dec->time_inc_bits) {
851 : chenm001 156 time_increment = (BitstreamGetBits(bs, dec->time_inc_bits)); // vop_time_increment
852 : Isibaar 3 }
853 : suxen_drol 240
854 : suxen_drol 252 DPRINTF(DPRINTF_HEADER, "time_base %i", time_incr);
855 :     DPRINTF(DPRINTF_HEADER, "time_increment %i", time_increment);
856 :    
857 :     DPRINTF(DPRINTF_TIMECODE, "%c %i:%i",
858 : suxen_drol 631 coding_type == I_VOP ? 'I' : coding_type == P_VOP ? 'P' : coding_type == B_VOP ? 'B' : 'S',
859 : suxen_drol 240 time_incr, time_increment);
860 :    
861 : edgomez 195 if (coding_type != B_VOP) {
862 :     dec->last_time_base = dec->time_base;
863 : chenm001 156 dec->time_base += time_incr;
864 : chl 316 dec->time = time_increment;
865 :    
866 : suxen_drol 631 /* dec->time_base * dec->time_inc_resolution +
867 : edgomez 195 time_increment;
868 : chl 316 */ dec->time_pp = (uint32_t)
869 : suxen_drol 631 (dec->time_inc_resolution + dec->time - dec->last_non_b_time)%dec->time_inc_resolution;
870 : edgomez 195 dec->last_non_b_time = dec->time;
871 :     } else {
872 : chl 316 dec->time = time_increment;
873 :     /*
874 : edgomez 195 (dec->last_time_base +
875 : suxen_drol 631 time_incr) * dec->time_inc_resolution + time_increment;
876 : chl 316 */
877 : chl 313 dec->time_bp = (uint32_t)
878 : suxen_drol 631 (dec->time_inc_resolution + dec->last_non_b_time - dec->time)%dec->time_inc_resolution;
879 : chenm001 156 }
880 : suxen_drol 707 DPRINTF(DPRINTF_HEADER,"time_pp=%i", dec->time_pp);
881 :     DPRINTF(DPRINTF_HEADER,"time_bp=%i", dec->time_bp);
882 : Isibaar 3
883 :     READ_MARKER();
884 :    
885 : edgomez 195 if (!BitstreamGetBit(bs)) // vop_coded
886 : Isibaar 3 {
887 : suxen_drol 252 DPRINTF(DPRINTF_HEADER, "vop_coded==false");
888 : Isibaar 3 return N_VOP;
889 :     }
890 :    
891 : suxen_drol 631 if (dec->newpred_enable)
892 :     {
893 :     int vop_id;
894 :     int vop_id_for_prediction;
895 :    
896 :     vop_id = BitstreamGetBits(bs, MIN(dec->time_inc_bits + 3, 15));
897 :     DPRINTF(DPRINTF_HEADER, "vop_id %i", vop_id);
898 :     if (BitstreamGetBit(bs)) /* vop_id_for_prediction_indication */
899 :     {
900 :     vop_id_for_prediction = BitstreamGetBits(bs, MIN(dec->time_inc_bits + 3, 15));
901 :     DPRINTF(DPRINTF_HEADER, "vop_id_for_prediction %i", vop_id_for_prediction);
902 :     }
903 :     READ_MARKER();
904 :     }
905 : Isibaar 3
906 : suxen_drol 631
907 :    
908 : chenm001 156 // fix a little bug by MinChen <chenm002@163.com>
909 : edgomez 195 if ((dec->shape != VIDOBJLAY_SHAPE_BINARY_ONLY) &&
910 : suxen_drol 631 ( (coding_type == P_VOP) || (coding_type == S_VOP && dec->sprite_enable == SPRITE_GMC) ) ) {
911 : Isibaar 3 *rounding = BitstreamGetBit(bs); // rounding_type
912 : suxen_drol 252 DPRINTF(DPRINTF_HEADER, "rounding %i", *rounding);
913 : Isibaar 3 }
914 :    
915 : suxen_drol 631 if (dec->reduced_resolution_enable &&
916 :     dec->shape == VIDOBJLAY_SHAPE_RECTANGULAR &&
917 :     (coding_type == P_VOP || coding_type == I_VOP)) {
918 : Isibaar 3
919 : suxen_drol 631 *reduced_resolution = BitstreamGetBit(bs);
920 : suxen_drol 694 DPRINTF(DPRINTF_HEADER, "reduced_resolution %i", *reduced_resolution);
921 : suxen_drol 631 }
922 :     else
923 :     {
924 :     *reduced_resolution = 0;
925 :     }
926 :    
927 : edgomez 195 if (dec->shape != VIDOBJLAY_SHAPE_RECTANGULAR) {
928 : suxen_drol 631 if(!(dec->sprite_enable == SPRITE_STATIC && coding_type == I_VOP)) {
929 : edgomez 195
930 : suxen_drol 631 uint32_t width, height;
931 :     uint32_t horiz_mc_ref, vert_mc_ref;
932 : Isibaar 3
933 : suxen_drol 631 width = BitstreamGetBits(bs, 13);
934 :     READ_MARKER();
935 :     height = BitstreamGetBits(bs, 13);
936 :     READ_MARKER();
937 :     horiz_mc_ref = BitstreamGetBits(bs, 13);
938 :     READ_MARKER();
939 :     vert_mc_ref = BitstreamGetBits(bs, 13);
940 :     READ_MARKER();
941 : Isibaar 3
942 : suxen_drol 631 DPRINTF(DPRINTF_HEADER, "width %i", width);
943 :     DPRINTF(DPRINTF_HEADER, "height %i", height);
944 :     DPRINTF(DPRINTF_HEADER, "horiz_mc_ref %i", horiz_mc_ref);
945 :     DPRINTF(DPRINTF_HEADER, "vert_mc_ref %i", vert_mc_ref);
946 :     }
947 :    
948 : edgomez 195 BitstreamSkip(bs, 1); // change_conv_ratio_disable
949 :     if (BitstreamGetBit(bs)) // vop_constant_alpha
950 : Isibaar 3 {
951 : edgomez 195 BitstreamSkip(bs, 8); // vop_constant_alpha_value
952 : Isibaar 3 }
953 :     }
954 :    
955 : edgomez 195 if (dec->shape != VIDOBJLAY_SHAPE_BINARY_ONLY) {
956 : suxen_drol 694
957 :     if (!dec->complexity_estimation_disable)
958 :     {
959 :     read_vop_complexity_estimation_header(bs, dec, coding_type);
960 :     }
961 :    
962 : Isibaar 3 // intra_dc_vlc_threshold
963 : edgomez 195 *intra_dc_threshold =
964 :     intra_dc_threshold_table[BitstreamGetBits(bs, 3)];
965 : Isibaar 3
966 : h 543 dec->top_field_first = 0;
967 :     dec->alternate_vertical_scan = 0;
968 :    
969 : edgomez 195 if (dec->interlacing) {
970 : suxen_drol 252 dec->top_field_first = BitstreamGetBit(bs);
971 :     DPRINTF(DPRINTF_HEADER, "interlace top_field_first %i", dec->top_field_first);
972 :     dec->alternate_vertical_scan = BitstreamGetBit(bs);
973 :     DPRINTF(DPRINTF_HEADER, "interlace alternate_vertical_scan %i", dec->alternate_vertical_scan);
974 :    
975 : h 69 }
976 : Isibaar 3 }
977 : edgomez 195
978 : suxen_drol 631 if ((dec->sprite_enable == SPRITE_STATIC || dec->sprite_enable== SPRITE_GMC) && coding_type == S_VOP) {
979 :    
980 :     int i;
981 :    
982 :     for (i = 0 ; i < dec->sprite_warping_points; i++)
983 :     {
984 :     int length;
985 :     int x = 0, y = 0;
986 :    
987 :     /* sprite code borowed from ffmpeg; thx Michael Niedermayer <michaelni@gmx.at> */
988 :     length = bs_get_spritetrajectory(bs);
989 :     if(length){
990 :     x= BitstreamGetBits(bs, length);
991 :     if ((x >> (length - 1)) == 0) /* if MSB not set it is negative*/
992 :     x = - (x ^ ((1 << length) - 1));
993 :     }
994 :     READ_MARKER();
995 :    
996 :     length = bs_get_spritetrajectory(bs);
997 :     if(length){
998 :     y = BitstreamGetBits(bs, length);
999 :     if ((y >> (length - 1)) == 0) /* if MSB not set it is negative*/
1000 :     y = - (y ^ ((1 << length) - 1));
1001 :     }
1002 :     READ_MARKER();
1003 :    
1004 :     gmc_mv[i].x = x;
1005 :     gmc_mv[i].y = y;
1006 :    
1007 :     DPRINTF(DPRINTF_HEADER,"sprite_warping_point[%i] xy=(%i,%i)", i, x, y);
1008 :     }
1009 :    
1010 :     if (dec->sprite_brightness_change)
1011 :     {
1012 :     // XXX: brightness_change_factor()
1013 :     }
1014 :     if (dec->sprite_enable == SPRITE_STATIC)
1015 :     {
1016 :     // XXX: todo
1017 :     }
1018 :    
1019 :     }
1020 :    
1021 : edgomez 195 if ((*quant = BitstreamGetBits(bs, dec->quant_bits)) < 1) // vop_quant
1022 : Isibaar 157 *quant = 1;
1023 : suxen_drol 252 DPRINTF(DPRINTF_HEADER, "quant %i", *quant);
1024 : edgomez 195
1025 :     if (coding_type != I_VOP) {
1026 :     *fcode_forward = BitstreamGetBits(bs, 3); // fcode_forward
1027 : suxen_drol 252 DPRINTF(DPRINTF_HEADER, "fcode_forward %i", *fcode_forward);
1028 : Isibaar 3 }
1029 : edgomez 195
1030 :     if (coding_type == B_VOP) {
1031 :     *fcode_backward = BitstreamGetBits(bs, 3); // fcode_backward
1032 : suxen_drol 252 DPRINTF(DPRINTF_HEADER, "fcode_backward %i", *fcode_backward);
1033 : Isibaar 3 }
1034 : edgomez 195 if (!dec->scalability) {
1035 :     if ((dec->shape != VIDOBJLAY_SHAPE_RECTANGULAR) &&
1036 :     (coding_type != I_VOP)) {
1037 :     BitstreamSkip(bs, 1); // vop_shape_coding_type
1038 : chenm001 156 }
1039 :     }
1040 : Isibaar 3 return coding_type;
1041 : suxen_drol 252
1042 : edgomez 195 } else if (start_code == USERDATA_START_CODE) {
1043 : Isibaar 645 char tmp[256];
1044 : suxen_drol 698 int i, version, build;
1045 :     char packed;
1046 : suxen_drol 252
1047 : edgomez 195 BitstreamSkip(bs, 32); // user_data_start_code
1048 : suxen_drol 252
1049 : Isibaar 645 tmp[0] = BitstreamShowBits(bs, 8);
1050 :    
1051 :     for(i = 1; i < 256; i++){
1052 :     tmp[i] = (BitstreamShowBits(bs, 16) & 0xFF);
1053 :    
1054 :     if(tmp[i] == 0)
1055 :     break;
1056 :    
1057 :     BitstreamSkip(bs, 8);
1058 :     }
1059 :    
1060 :     DPRINTF(DPRINTF_STARTCODE, "<user_data>: %s\n", tmp);
1061 :    
1062 : suxen_drol 694 /* divx detection */
1063 :     i = sscanf(tmp, "DivX%dBuild%d%c", &version, &build, &packed);
1064 :     if (i < 2)
1065 :     i = sscanf(tmp, "DivX%db%d%c", &version, &build, &packed);
1066 :    
1067 :     if (i >= 2)
1068 :     {
1069 :     dec->packed_mode = (i == 3 && packed == 'p');
1070 :     DPRINTF(DPRINTF_HEADER, "divx version=%i, build=%i packed=%i",
1071 :     version, build, dec->packed_mode);
1072 :     }
1073 : Isibaar 645
1074 : edgomez 195 } else // start_code == ?
1075 : Isibaar 3 {
1076 : edgomez 195 if (BitstreamShowBits(bs, 24) == 0x000001) {
1077 : suxen_drol 252 DPRINTF(DPRINTF_STARTCODE, "<unknown: %x>", BitstreamShowBits(bs, 32));
1078 : Isibaar 3 }
1079 :     BitstreamSkip(bs, 8);
1080 :     }
1081 :     }
1082 :     while ((BitstreamPos(bs) >> 3) < bs->length);
1083 :    
1084 : suxen_drol 233 //DPRINTF("*** WARNING: no vop_start_code found");
1085 : edgomez 195 return -1; /* ignore it */
1086 : Isibaar 3 }
1087 :    
1088 :    
1089 :     /* write custom quant matrix */
1090 :    
1091 : edgomez 195 static void
1092 :     bs_put_matrix(Bitstream * bs,
1093 :     const int16_t * matrix)
1094 : Isibaar 3 {
1095 :     int i, j;
1096 :     const int last = matrix[scan_tables[0][63]];
1097 :    
1098 : suxen_drol 233 for (j = 63; j > 0 && matrix[scan_tables[0][j - 1]] == last; j--);
1099 : Isibaar 3
1100 : edgomez 195 for (i = 0; i <= j; i++) {
1101 : Isibaar 3 BitstreamPutBits(bs, matrix[scan_tables[0][i]], 8);
1102 :     }
1103 :    
1104 : edgomez 195 if (j < 63) {
1105 : Isibaar 3 BitstreamPutBits(bs, 0, 8);
1106 :     }
1107 :     }
1108 :    
1109 :    
1110 :     /*
1111 :     write vol header
1112 :     */
1113 : edgomez 195 void
1114 :     BitstreamWriteVolHeader(Bitstream * const bs,
1115 :     const MBParam * pParam,
1116 : chl 619 const FRAMEINFO * const frame)
1117 : Isibaar 3 {
1118 : suxen_drol 733 static const unsigned int vo_id = 0;
1119 :     static const unsigned int vol_id = 0;
1120 : chl 619 int vol_ver_id=1;
1121 : suxen_drol 746 int profile = 0x03; /* simple profile/level 3 */
1122 : chl 619
1123 : suxen_drol 701 if ( pParam->m_quarterpel || (frame->global_flags & XVID_GMC) ||
1124 :     (pParam->global & XVID_GLOBAL_REDUCED))
1125 : chl 619 vol_ver_id = 2;
1126 : suxen_drol 746
1127 :     if ((pParam->global & XVID_GLOBAL_REDUCED))
1128 :     profile = 0x93; /* advanced realtime simple profile/level 3 */
1129 :    
1130 :     if (pParam->m_quarterpel || (frame->global_flags & XVID_GMC))
1131 :     profile = 0xf3; /* advanced simple profile/level 2 */
1132 :    
1133 :     // visual_object_sequence_start_code
1134 :     BitstreamPad(bs);
1135 :     BitstreamPutBits(bs, VISOBJSEQ_START_CODE, 32);
1136 :     BitstreamPutBits(bs, profile, 8);
1137 :    
1138 :     // visual_object_start_code
1139 :     BitstreamPad(bs);
1140 :     BitstreamPutBits(bs, VISOBJ_START_CODE, 32);
1141 :     BitstreamPutBits(bs, 0, 1); // is_visual_object_identifier
1142 :     BitstreamPutBits(bs, VISOBJ_TYPE_VIDEO, 4); // visual_object_type
1143 : chl 619
1144 : Isibaar 3 // video object_start_code & vo_id
1145 : edgomez 195 BitstreamPad(bs);
1146 : suxen_drol 727 BitstreamPutBits(bs, VIDOBJ_START_CODE|(vo_id&0x5), 32);
1147 : Isibaar 3
1148 :     // video_object_layer_start_code & vol_id
1149 : suxen_drol 727 BitstreamPutBits(bs, VIDOBJLAY_START_CODE|(vol_id&0x4), 32);
1150 : Isibaar 3
1151 : edgomez 195 BitstreamPutBit(bs, 0); // random_accessible_vol
1152 :     BitstreamPutBits(bs, 0, 8); // video_object_type_indication
1153 : Isibaar 579
1154 : chl 619 if (vol_ver_id == 1)
1155 : Isibaar 579 {
1156 :     BitstreamPutBit(bs, 0); // is_object_layer_identified (0=not given)
1157 :     }
1158 :     else
1159 :     {
1160 :     BitstreamPutBit(bs, 1); // is_object_layer_identified
1161 : chl 619 BitstreamPutBits(bs, vol_ver_id, 4); // vol_ver_id == 2
1162 :     BitstreamPutBits(bs, 4, 3); // vol_ver_priority (1==lowest, 7==highest) ??
1163 : Isibaar 579 }
1164 :    
1165 : edgomez 195 BitstreamPutBits(bs, 1, 4); // aspect_ratio_info (1=1:1)
1166 : suxen_drol 164
1167 : chl 387 BitstreamPutBit(bs, 1); // vol_control_parameters
1168 :     BitstreamPutBits(bs, 1, 2); // chroma_format 1="4:2:0"
1169 :    
1170 : edgomez 195 if (pParam->max_bframes > 0) {
1171 :     BitstreamPutBit(bs, 0); // low_delay
1172 :     } else
1173 : suxen_drol 164 {
1174 : chl 386 BitstreamPutBit(bs, 1); // low_delay
1175 : suxen_drol 164 }
1176 : chl 387 BitstreamPutBit(bs, 0); // vbv_parameters (0=not given)
1177 : suxen_drol 164
1178 : edgomez 195 BitstreamPutBits(bs, 0, 2); // video_object_layer_shape (0=rectangular)
1179 : Isibaar 3
1180 :     WRITE_MARKER();
1181 : edgomez 195
1182 : suxen_drol 631 /* time_inc_resolution; ignored by current decore versions
1183 : edgomez 195 eg. 2fps res=2 inc=1
1184 :     25fps res=25 inc=1
1185 :     29.97fps res=30000 inc=1001
1186 :     */
1187 : suxen_drol 163 BitstreamPutBits(bs, pParam->fbase, 16);
1188 : Isibaar 3
1189 :     WRITE_MARKER();
1190 :    
1191 : suxen_drol 241 BitstreamPutBit(bs, 1); // fixed_vop_rate = 1
1192 :     BitstreamPutBits(bs, pParam->fincr, log2bin(pParam->fbase)); // fixed_vop_time_increment
1193 : Isibaar 3
1194 :     WRITE_MARKER();
1195 : edgomez 195 BitstreamPutBits(bs, pParam->width, 13); // width
1196 : Isibaar 3 WRITE_MARKER();
1197 : edgomez 195 BitstreamPutBits(bs, pParam->height, 13); // height
1198 : Isibaar 3 WRITE_MARKER();
1199 : edgomez 195
1200 :     BitstreamPutBit(bs, frame->global_flags & XVID_INTERLACING); // interlace
1201 : Isibaar 3 BitstreamPutBit(bs, 1); // obmc_disable (overlapped block motion compensation)
1202 : Isibaar 579
1203 : chl 619 if (vol_ver_id != 1)
1204 :     { if (frame->global_flags & XVID_GMC)
1205 :     { BitstreamPutBits(bs, 2, 2); // sprite_enable=='GMC'
1206 :     BitstreamPutBits(bs, 2, 6); // no_of_sprite_warping_points
1207 :     BitstreamPutBits(bs, 3, 2); // sprite_warping_accuracy 0==1/2, 1=1/4, 2=1/8, 3=1/16
1208 :     BitstreamPutBit(bs, 0); // sprite_brightness_change (not supported)
1209 :    
1210 :     /* currently we use no_of_sprite_warping_points==2, sprite_warping_accuracy==3
1211 :     for DivX5 compatability */
1212 :    
1213 :     } else
1214 :     BitstreamPutBits(bs, 0, 2); // sprite_enable==off
1215 : Isibaar 579 }
1216 :     else
1217 : chl 619 BitstreamPutBit(bs, 0); // sprite_enable==off
1218 : Isibaar 579
1219 : chl 619 BitstreamPutBit(bs, 0); // not_8_bit
1220 : Isibaar 3
1221 :     // quant_type 0=h.263 1=mpeg4(quantizer tables)
1222 : suxen_drol 136 BitstreamPutBit(bs, pParam->m_quant_type);
1223 : edgomez 195
1224 :     if (pParam->m_quant_type) {
1225 : Isibaar 4 BitstreamPutBit(bs, get_intra_matrix_status()); // load_intra_quant_mat
1226 : edgomez 195 if (get_intra_matrix_status()) {
1227 : Isibaar 4 bs_put_matrix(bs, get_intra_matrix());
1228 : Isibaar 3 }
1229 :    
1230 : edgomez 195 BitstreamPutBit(bs, get_inter_matrix_status()); // load_inter_quant_mat
1231 :     if (get_inter_matrix_status()) {
1232 : Isibaar 4 bs_put_matrix(bs, get_inter_matrix());
1233 : Isibaar 3 }
1234 :    
1235 :     }
1236 :    
1237 : chl 619 if (vol_ver_id != 1) {
1238 :     if (pParam->m_quarterpel)
1239 :     BitstreamPutBit(bs, 1); // quarterpel
1240 :     else
1241 :     BitstreamPutBit(bs, 0); // no quarterpel
1242 : Isibaar 579 }
1243 :    
1244 : Isibaar 3 BitstreamPutBit(bs, 1); // complexity_estimation_disable
1245 :     BitstreamPutBit(bs, 1); // resync_marker_disable
1246 :     BitstreamPutBit(bs, 0); // data_partitioned
1247 : Isibaar 579
1248 : chl 619 if (vol_ver_id != 1)
1249 : Isibaar 579 {
1250 :     BitstreamPutBit(bs, 0); // newpred_enable
1251 : suxen_drol 701
1252 :     BitstreamPutBit(bs, (pParam->global & XVID_GLOBAL_REDUCED)?1:0);
1253 :     /* reduced_resolution_vop_enabled */
1254 : Isibaar 579 }
1255 : chl 619
1256 :     BitstreamPutBit(bs, 0); // scalability
1257 : Isibaar 579
1258 : Isibaar 3 }
1259 :    
1260 :    
1261 :     /*
1262 :     write vop header
1263 :     */
1264 : edgomez 195 void
1265 : suxen_drol 701 BitstreamWriteVopHeader(
1266 :     Bitstream * const bs,
1267 : edgomez 195 const MBParam * pParam,
1268 : chl 619 const FRAMEINFO * const frame,
1269 : suxen_drol 229 int vop_coded)
1270 : Isibaar 3 {
1271 : suxen_drol 152 uint32_t i;
1272 : chl 387
1273 : edgomez 195 BitstreamPad(bs);
1274 :     BitstreamPutBits(bs, VOP_START_CODE, 32);
1275 : Isibaar 3
1276 : edgomez 195 BitstreamPutBits(bs, frame->coding_type, 2);
1277 : suxen_drol 631 DPRINTF(DPRINTF_HEADER, "coding_type = %i", frame->coding_type);
1278 : edgomez 195
1279 :     for (i = 0; i < frame->seconds; i++) {
1280 : suxen_drol 152 BitstreamPutBit(bs, 1);
1281 :     }
1282 :     BitstreamPutBit(bs, 0);
1283 : Isibaar 3
1284 :     WRITE_MARKER();
1285 :    
1286 :     // time_increment: value=nth_of_sec, nbits = log2(resolution)
1287 : chl 619
1288 : edgomez 195 BitstreamPutBits(bs, frame->ticks, log2bin(pParam->fbase));
1289 : suxen_drol 631 /*DPRINTF("[%i:%i] %c", frame->seconds, frame->ticks,
1290 : edgomez 195 frame->coding_type == I_VOP ? 'I' : frame->coding_type ==
1291 : suxen_drol 252 P_VOP ? 'P' : 'B');*/
1292 : Isibaar 3
1293 :     WRITE_MARKER();
1294 :    
1295 : suxen_drol 229 if (!vop_coded) {
1296 :     BitstreamPutBits(bs, 0, 1);
1297 :     return;
1298 :     }
1299 :    
1300 : edgomez 195 BitstreamPutBits(bs, 1, 1); // vop_coded
1301 : Isibaar 3
1302 : chl 619 if ( (frame->coding_type == P_VOP) || (frame->coding_type == S_VOP) )
1303 : suxen_drol 136 BitstreamPutBits(bs, frame->rounding_type, 1);
1304 : Isibaar 3
1305 : suxen_drol 701 if ((pParam->global & XVID_GLOBAL_REDUCED))
1306 :     BitstreamPutBit(bs, (frame->global_flags & XVID_REDUCED)?1:0);
1307 :    
1308 : edgomez 195 BitstreamPutBits(bs, 0, 3); // intra_dc_vlc_threshold
1309 :    
1310 :     if (frame->global_flags & XVID_INTERLACING) {
1311 : h 543 BitstreamPutBit(bs, (frame->global_flags & XVID_TOPFIELDFIRST));
1312 :     BitstreamPutBit(bs, (frame->global_flags & XVID_ALTERNATESCAN));
1313 : h 69 }
1314 : chl 619
1315 :     if (frame->coding_type == S_VOP) {
1316 :     if (1) { // no_of_sprite_warping_points>=1
1317 :     if (pParam->m_quarterpel)
1318 :     bs_put_spritetrajectory(bs, frame->GMC_MV.x/2 ); // du[0]
1319 :     else
1320 :     bs_put_spritetrajectory(bs, frame->GMC_MV.x ); // du[0]
1321 :     WRITE_MARKER();
1322 :    
1323 :     if (pParam->m_quarterpel)
1324 :     bs_put_spritetrajectory(bs, frame->GMC_MV.y/2 ); // dv[0]
1325 :     else
1326 :     bs_put_spritetrajectory(bs, frame->GMC_MV.y ); // dv[0]
1327 :     WRITE_MARKER();
1328 : suxen_drol 631
1329 :    
1330 :     if (pParam->m_quarterpel)
1331 :     {
1332 :     DPRINTF(DPRINTF_HEADER,"sprite_warping_point[%i] xy=(%i,%i) *QPEL*", 0, frame->GMC_MV.x/2, frame->GMC_MV.y/2);
1333 :     }
1334 :     else
1335 :     {
1336 :     DPRINTF(DPRINTF_HEADER,"sprite_warping_point[%i] xy=(%i,%i)", 0, frame->GMC_MV.x, frame->GMC_MV.y);
1337 :     }
1338 :    
1339 : chl 619 }
1340 :     /* GMC is halfpel in bitstream, even though GMC_MV was pseudo-qpel (2*halfpel) */
1341 : h 69
1342 : chl 619 if (2) { // no_of_sprite_warping_points>=2 (for DivX5 compat)
1343 :     bs_put_spritetrajectory(bs, 0 );
1344 :     WRITE_MARKER();
1345 :     bs_put_spritetrajectory(bs, 0 );
1346 :     WRITE_MARKER();
1347 :     }
1348 :     // no support for brightness_change!
1349 :     }
1350 :    
1351 : suxen_drol 694
1352 :     DPRINTF(DPRINTF_HEADER, "quant = %i", frame->quant);
1353 :    
1354 : edgomez 195 BitstreamPutBits(bs, frame->quant, 5); // quantizer
1355 :    
1356 : suxen_drol 136 if (frame->coding_type != I_VOP)
1357 : edgomez 195 BitstreamPutBits(bs, frame->fcode, 3); // forward_fixed_code
1358 : suxen_drol 152
1359 :     if (frame->coding_type == B_VOP)
1360 : edgomez 195 BitstreamPutBits(bs, frame->bcode, 3); // backward_fixed_code
1361 : suxen_drol 152
1362 : Isibaar 3 }
1363 : suxen_drol 229
1364 :     void
1365 :     BitstreamWriteUserData(Bitstream * const bs,
1366 :     uint8_t * data,
1367 :     const int length)
1368 :     {
1369 :     int i;
1370 :    
1371 :     BitstreamPad(bs);
1372 :     BitstreamPutBits(bs, USERDATA_START_CODE, 32);
1373 :    
1374 :     for (i = 0; i < length; i++) {
1375 :     BitstreamPutBits(bs, data[i], 8);
1376 :     }
1377 :    
1378 : chl 313 }

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