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1 : edgomez 1382 /*****************************************************************************
2 :     *
3 :     * XVID MPEG-4 VIDEO CODEC
4 :     * - Bitstream reader/writer -
5 :     *
6 :     * Copyright (C) 2001-2003 Peter Ross <pross@xvid.org>
7 :     * 2003 Cristoph Lampert <gruel@web.de>
8 :     *
9 :     * This program is free software ; you can redistribute it and/or modify
10 :     * it under the terms of the GNU General Public License as published by
11 :     * the Free Software Foundation ; either version 2 of the License, or
12 :     * (at your option) any later version.
13 :     *
14 :     * This program is distributed in the hope that it will be useful,
15 :     * but WITHOUT ANY WARRANTY ; without even the implied warranty of
16 :     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 :     * GNU General Public License for more details.
18 :     *
19 :     * You should have received a copy of the GNU General Public License
20 :     * along with this program ; if not, write to the Free Software
21 :     * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 :     *
23 : Skal 1616 * $Id: bitstream.c,v 1.51 2005-05-17 21:03:32 Skal Exp $
24 : edgomez 1382 *
25 :     ****************************************************************************/
26 : Isibaar 3
27 : edgomez 851 #include <string.h>
28 :     #include <stdio.h>
29 :    
30 : Isibaar 3 #include "bitstream.h"
31 :     #include "zigzag.h"
32 : Isibaar 4 #include "../quant/quant_matrix.h"
33 : edgomez 851 #include "mbcoding.h"
34 : Isibaar 3
35 : chenm001 124
36 : Skal 1616 static const uint8_t log2_tab_16[256] = { 0, 1, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4 };
37 :    
38 :     static uint32_t __inline log2bin(uint32_t value)
39 : Isibaar 3 {
40 : Skal 1616 int n = 0;
41 :     if (value & 0xffff0000) {
42 :     value >>= 16;
43 :     n += 16;
44 :     }
45 :     if (value & 0xff00) {
46 :     value >>= 8;
47 :     n += 8;
48 :     }
49 :     if (value & 0xf0) {
50 :     value >>= 4;
51 :     n += 4;
52 :     }
53 :     return n + log2_tab_16[value];
54 : Isibaar 3 }
55 :    
56 : edgomez 195 static const uint32_t intra_dc_threshold_table[] = {
57 :     32, /* never use */
58 : Isibaar 3 13,
59 :     15,
60 :     17,
61 :     19,
62 :     21,
63 :     23,
64 :     1,
65 :     };
66 :    
67 :    
68 : edgomez 195 void
69 :     bs_get_matrix(Bitstream * bs,
70 :     uint8_t * matrix)
71 :     {
72 :     int i = 0;
73 :     int last, value = 0;
74 : Isibaar 4
75 : edgomez 195 do {
76 :     last = value;
77 :     value = BitstreamGetBits(bs, 8);
78 :     matrix[scan_tables[0][i++]] = value;
79 :     }
80 :     while (value != 0 && i < 64);
81 :    
82 : syskin 1480 if (value != 0) return;
83 :    
84 :     i--;
85 : edgomez 195 while (i < 64) {
86 :     matrix[scan_tables[0][i++]] = last;
87 :     }
88 :     }
89 :    
90 : suxen_drol 248
91 :    
92 : edgomez 1382 /*
93 :     * for PVOP addbits == fcode - 1
94 :     * for BVOP addbits == max(fcode,bcode) - 1
95 :     * returns mbpos
96 :     */
97 : suxen_drol 248 int
98 : edgomez 1382 read_video_packet_header(Bitstream *bs,
99 :     DECODER * dec,
100 :     const int addbits,
101 :     int * quant,
102 : edgomez 851 int * fcode_forward,
103 :     int * fcode_backward,
104 :     int * intra_dc_threshold)
105 : suxen_drol 248 {
106 : edgomez 851 int startcode_bits = NUMBITS_VP_RESYNC_MARKER + addbits;
107 :     int mbnum_bits = log2bin(dec->mb_width * dec->mb_height - 1);
108 : suxen_drol 248 int mbnum;
109 : edgomez 851 int hec = 0;
110 : suxen_drol 248
111 :     BitstreamSkip(bs, BitstreamNumBitsToByteAlign(bs));
112 : edgomez 851 BitstreamSkip(bs, startcode_bits);
113 : suxen_drol 248
114 : edgomez 1382 DPRINTF(XVID_DEBUG_STARTCODE, "<video_packet_header>\n");
115 : suxen_drol 252
116 : edgomez 851 if (dec->shape != VIDOBJLAY_SHAPE_RECTANGULAR)
117 :     {
118 :     hec = BitstreamGetBit(bs); /* header_extension_code */
119 : edgomez 1382 if (hec && !(dec->sprite_enable == SPRITE_STATIC /* && current_coding_type = I_VOP */))
120 : edgomez 851 {
121 :     BitstreamSkip(bs, 13); /* vop_width */
122 :     READ_MARKER();
123 :     BitstreamSkip(bs, 13); /* vop_height */
124 :     READ_MARKER();
125 :     BitstreamSkip(bs, 13); /* vop_horizontal_mc_spatial_ref */
126 :     READ_MARKER();
127 :     BitstreamSkip(bs, 13); /* vop_vertical_mc_spatial_ref */
128 :     READ_MARKER();
129 :     }
130 :     }
131 : suxen_drol 248
132 : edgomez 851 mbnum = BitstreamGetBits(bs, mbnum_bits); /* macroblock_number */
133 : edgomez 1382 DPRINTF(XVID_DEBUG_HEADER, "mbnum %i\n", mbnum);
134 : suxen_drol 248
135 : edgomez 851 if (dec->shape != VIDOBJLAY_SHAPE_BINARY_ONLY)
136 :     {
137 : edgomez 1382 *quant = BitstreamGetBits(bs, dec->quant_bits); /* quant_scale */
138 :     DPRINTF(XVID_DEBUG_HEADER, "quant %i\n", *quant);
139 : edgomez 851 }
140 : suxen_drol 248
141 : edgomez 851 if (dec->shape == VIDOBJLAY_SHAPE_RECTANGULAR)
142 :     hec = BitstreamGetBit(bs); /* header_extension_code */
143 :    
144 :    
145 : edgomez 1382 DPRINTF(XVID_DEBUG_HEADER, "header_extension_code %i\n", hec);
146 : edgomez 851 if (hec)
147 :     {
148 :     int time_base;
149 :     int time_increment;
150 :     int coding_type;
151 : suxen_drol 248
152 : edgomez 851 for (time_base=0; BitstreamGetBit(bs)!=0; time_base++); /* modulo_time_base */
153 :     READ_MARKER();
154 :     if (dec->time_inc_bits)
155 :     time_increment = (BitstreamGetBits(bs, dec->time_inc_bits)); /* vop_time_increment */
156 :     READ_MARKER();
157 : edgomez 1382 DPRINTF(XVID_DEBUG_HEADER,"time %i:%i\n", time_base, time_increment);
158 : edgomez 851
159 :     coding_type = BitstreamGetBits(bs, 2);
160 : edgomez 1382 DPRINTF(XVID_DEBUG_HEADER,"coding_type %i\n", coding_type);
161 :    
162 : edgomez 851 if (dec->shape != VIDOBJLAY_SHAPE_RECTANGULAR)
163 :     {
164 :     BitstreamSkip(bs, 1); /* change_conv_ratio_disable */
165 :     if (coding_type != I_VOP)
166 :     BitstreamSkip(bs, 1); /* vop_shape_coding_type */
167 :     }
168 :    
169 :     if (dec->shape != VIDOBJLAY_SHAPE_BINARY_ONLY)
170 :     {
171 :     *intra_dc_threshold = intra_dc_threshold_table[BitstreamGetBits(bs, 3)];
172 :    
173 :     if (dec->sprite_enable == SPRITE_GMC && coding_type == S_VOP &&
174 :     dec->sprite_warping_points > 0)
175 :     {
176 : edgomez 1382 /* TODO: sprite trajectory */
177 : edgomez 851 }
178 : edgomez 1382 if (dec->reduced_resolution_enable &&
179 : edgomez 851 dec->shape == VIDOBJLAY_SHAPE_RECTANGULAR &&
180 :     (coding_type == P_VOP || coding_type == I_VOP))
181 :     {
182 :     BitstreamSkip(bs, 1); /* XXX: vop_reduced_resolution */
183 :     }
184 :    
185 :     if (coding_type != I_VOP && fcode_forward)
186 :     {
187 :     *fcode_forward = BitstreamGetBits(bs, 3);
188 : edgomez 1382 DPRINTF(XVID_DEBUG_HEADER,"fcode_forward %i\n", *fcode_forward);
189 : edgomez 851 }
190 :    
191 :     if (coding_type == B_VOP && fcode_backward)
192 :     {
193 :     *fcode_backward = BitstreamGetBits(bs, 3);
194 : edgomez 1382 DPRINTF(XVID_DEBUG_HEADER,"fcode_backward %i\n", *fcode_backward);
195 : edgomez 851 }
196 :     }
197 :    
198 :     }
199 :    
200 :     if (dec->newpred_enable)
201 :     {
202 :     int vop_id;
203 :     int vop_id_for_prediction;
204 : edgomez 1382
205 : edgomez 851 vop_id = BitstreamGetBits(bs, MIN(dec->time_inc_bits + 3, 15));
206 : edgomez 1382 DPRINTF(XVID_DEBUG_HEADER, "vop_id %i\n", vop_id);
207 : edgomez 851 if (BitstreamGetBit(bs)) /* vop_id_for_prediction_indication */
208 :     {
209 :     vop_id_for_prediction = BitstreamGetBits(bs, MIN(dec->time_inc_bits + 3, 15));
210 : edgomez 1382 DPRINTF(XVID_DEBUG_HEADER, "vop_id_for_prediction %i\n", vop_id_for_prediction);
211 : edgomez 851 }
212 :     READ_MARKER();
213 :     }
214 :    
215 : suxen_drol 248 return mbnum;
216 :     }
217 :    
218 :    
219 :    
220 : edgomez 851
221 :     /* vol estimation header */
222 :     static void
223 :     read_vol_complexity_estimation_header(Bitstream * bs, DECODER * dec)
224 :     {
225 :     ESTIMATION * e = &dec->estimation;
226 :    
227 :     e->method = BitstreamGetBits(bs, 2); /* estimation_method */
228 : edgomez 1382 DPRINTF(XVID_DEBUG_HEADER,"+ complexity_estimation_header; method=%i\n", e->method);
229 : edgomez 851
230 : edgomez 1382 if (e->method == 0 || e->method == 1)
231 : edgomez 851 {
232 :     if (!BitstreamGetBit(bs)) /* shape_complexity_estimation_disable */
233 :     {
234 :     e->opaque = BitstreamGetBit(bs); /* opaque */
235 :     e->transparent = BitstreamGetBit(bs); /* transparent */
236 :     e->intra_cae = BitstreamGetBit(bs); /* intra_cae */
237 :     e->inter_cae = BitstreamGetBit(bs); /* inter_cae */
238 :     e->no_update = BitstreamGetBit(bs); /* no_update */
239 :     e->upsampling = BitstreamGetBit(bs); /* upsampling */
240 :     }
241 :    
242 :     if (!BitstreamGetBit(bs)) /* texture_complexity_estimation_set_1_disable */
243 :     {
244 :     e->intra_blocks = BitstreamGetBit(bs); /* intra_blocks */
245 :     e->inter_blocks = BitstreamGetBit(bs); /* inter_blocks */
246 :     e->inter4v_blocks = BitstreamGetBit(bs); /* inter4v_blocks */
247 :     e->not_coded_blocks = BitstreamGetBit(bs); /* not_coded_blocks */
248 :     }
249 :     }
250 :    
251 :     READ_MARKER();
252 :    
253 :     if (!BitstreamGetBit(bs)) /* texture_complexity_estimation_set_2_disable */
254 :     {
255 :     e->dct_coefs = BitstreamGetBit(bs); /* dct_coefs */
256 :     e->dct_lines = BitstreamGetBit(bs); /* dct_lines */
257 :     e->vlc_symbols = BitstreamGetBit(bs); /* vlc_symbols */
258 :     e->vlc_bits = BitstreamGetBit(bs); /* vlc_bits */
259 :     }
260 :    
261 :     if (!BitstreamGetBit(bs)) /* motion_compensation_complexity_disable */
262 :     {
263 :     e->apm = BitstreamGetBit(bs); /* apm */
264 :     e->npm = BitstreamGetBit(bs); /* npm */
265 :     e->interpolate_mc_q = BitstreamGetBit(bs); /* interpolate_mc_q */
266 :     e->forw_back_mc_q = BitstreamGetBit(bs); /* forw_back_mc_q */
267 :     e->halfpel2 = BitstreamGetBit(bs); /* halfpel2 */
268 :     e->halfpel4 = BitstreamGetBit(bs); /* halfpel4 */
269 :     }
270 :    
271 :     READ_MARKER();
272 :    
273 :     if (e->method == 1)
274 :     {
275 :     if (!BitstreamGetBit(bs)) /* version2_complexity_estimation_disable */
276 :     {
277 :     e->sadct = BitstreamGetBit(bs); /* sadct */
278 :     e->quarterpel = BitstreamGetBit(bs); /* quarterpel */
279 :     }
280 :     }
281 :     }
282 :    
283 :    
284 :     /* vop estimation header */
285 :     static void
286 :     read_vop_complexity_estimation_header(Bitstream * bs, DECODER * dec, int coding_type)
287 :     {
288 :     ESTIMATION * e = &dec->estimation;
289 :    
290 :     if (e->method == 0 || e->method == 1)
291 :     {
292 :     if (coding_type == I_VOP) {
293 :     if (e->opaque) BitstreamSkip(bs, 8); /* dcecs_opaque */
294 :     if (e->transparent) BitstreamSkip(bs, 8); /* */
295 :     if (e->intra_cae) BitstreamSkip(bs, 8); /* */
296 :     if (e->inter_cae) BitstreamSkip(bs, 8); /* */
297 :     if (e->no_update) BitstreamSkip(bs, 8); /* */
298 :     if (e->upsampling) BitstreamSkip(bs, 8); /* */
299 :     if (e->intra_blocks) BitstreamSkip(bs, 8); /* */
300 :     if (e->not_coded_blocks) BitstreamSkip(bs, 8); /* */
301 :     if (e->dct_coefs) BitstreamSkip(bs, 8); /* */
302 :     if (e->dct_lines) BitstreamSkip(bs, 8); /* */
303 :     if (e->vlc_symbols) BitstreamSkip(bs, 8); /* */
304 :     if (e->vlc_bits) BitstreamSkip(bs, 8); /* */
305 :     if (e->sadct) BitstreamSkip(bs, 8); /* */
306 :     }
307 : edgomez 1382
308 : edgomez 851 if (coding_type == P_VOP) {
309 :     if (e->opaque) BitstreamSkip(bs, 8); /* */
310 :     if (e->transparent) BitstreamSkip(bs, 8); /* */
311 :     if (e->intra_cae) BitstreamSkip(bs, 8); /* */
312 :     if (e->inter_cae) BitstreamSkip(bs, 8); /* */
313 :     if (e->no_update) BitstreamSkip(bs, 8); /* */
314 :     if (e->upsampling) BitstreamSkip(bs, 8); /* */
315 :     if (e->intra_blocks) BitstreamSkip(bs, 8); /* */
316 :     if (e->not_coded_blocks) BitstreamSkip(bs, 8); /* */
317 :     if (e->dct_coefs) BitstreamSkip(bs, 8); /* */
318 :     if (e->dct_lines) BitstreamSkip(bs, 8); /* */
319 :     if (e->vlc_symbols) BitstreamSkip(bs, 8); /* */
320 :     if (e->vlc_bits) BitstreamSkip(bs, 8); /* */
321 :     if (e->inter_blocks) BitstreamSkip(bs, 8); /* */
322 :     if (e->inter4v_blocks) BitstreamSkip(bs, 8); /* */
323 :     if (e->apm) BitstreamSkip(bs, 8); /* */
324 :     if (e->npm) BitstreamSkip(bs, 8); /* */
325 :     if (e->forw_back_mc_q) BitstreamSkip(bs, 8); /* */
326 :     if (e->halfpel2) BitstreamSkip(bs, 8); /* */
327 :     if (e->halfpel4) BitstreamSkip(bs, 8); /* */
328 :     if (e->sadct) BitstreamSkip(bs, 8); /* */
329 :     if (e->quarterpel) BitstreamSkip(bs, 8); /* */
330 :     }
331 :     if (coding_type == B_VOP) {
332 :     if (e->opaque) BitstreamSkip(bs, 8); /* */
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->inter_blocks) BitstreamSkip(bs, 8); /* */
345 :     if (e->inter4v_blocks) BitstreamSkip(bs, 8); /* */
346 :     if (e->apm) BitstreamSkip(bs, 8); /* */
347 :     if (e->npm) BitstreamSkip(bs, 8); /* */
348 :     if (e->forw_back_mc_q) BitstreamSkip(bs, 8); /* */
349 :     if (e->halfpel2) BitstreamSkip(bs, 8); /* */
350 :     if (e->halfpel4) BitstreamSkip(bs, 8); /* */
351 :     if (e->interpolate_mc_q) BitstreamSkip(bs, 8); /* */
352 :     if (e->sadct) BitstreamSkip(bs, 8); /* */
353 :     if (e->quarterpel) BitstreamSkip(bs, 8); /* */
354 :     }
355 :    
356 :     if (coding_type == S_VOP && dec->sprite_enable == SPRITE_STATIC) {
357 :     if (e->intra_blocks) BitstreamSkip(bs, 8); /* */
358 :     if (e->not_coded_blocks) BitstreamSkip(bs, 8); /* */
359 :     if (e->dct_coefs) BitstreamSkip(bs, 8); /* */
360 :     if (e->dct_lines) BitstreamSkip(bs, 8); /* */
361 :     if (e->vlc_symbols) BitstreamSkip(bs, 8); /* */
362 :     if (e->vlc_bits) BitstreamSkip(bs, 8); /* */
363 :     if (e->inter_blocks) BitstreamSkip(bs, 8); /* */
364 :     if (e->inter4v_blocks) BitstreamSkip(bs, 8); /* */
365 :     if (e->apm) BitstreamSkip(bs, 8); /* */
366 :     if (e->npm) BitstreamSkip(bs, 8); /* */
367 :     if (e->forw_back_mc_q) BitstreamSkip(bs, 8); /* */
368 :     if (e->halfpel2) BitstreamSkip(bs, 8); /* */
369 :     if (e->halfpel4) BitstreamSkip(bs, 8); /* */
370 :     if (e->interpolate_mc_q) BitstreamSkip(bs, 8); /* */
371 :     }
372 :     }
373 :     }
374 :    
375 :    
376 :    
377 :    
378 :    
379 : Isibaar 3 /*
380 :     decode headers
381 :     returns coding_type, or -1 if error
382 :     */
383 :    
384 : suxen_drol 252 #define VIDOBJ_START_CODE_MASK 0x0000001f
385 :     #define VIDOBJLAY_START_CODE_MASK 0x0000000f
386 :    
387 : edgomez 195 int
388 :     BitstreamReadHeaders(Bitstream * bs,
389 :     DECODER * dec,
390 :     uint32_t * rounding,
391 :     uint32_t * quant,
392 :     uint32_t * fcode_forward,
393 :     uint32_t * fcode_backward,
394 : edgomez 851 uint32_t * intra_dc_threshold,
395 :     WARPPOINTS *gmc_warp)
396 : Isibaar 3 {
397 :     uint32_t vol_ver_id;
398 :     uint32_t coding_type;
399 :     uint32_t start_code;
400 : edgomez 195 uint32_t time_incr = 0;
401 : edgomez 876 int32_t time_increment = 0;
402 : edgomez 851 int resize = 0;
403 : chenm001 156
404 : syskin 1553 while ((BitstreamPos(bs) >> 3) + 4 <= bs->length) {
405 : edgomez 851
406 : Isibaar 3 BitstreamByteAlign(bs);
407 :     start_code = BitstreamShowBits(bs, 32);
408 :    
409 : edgomez 195 if (start_code == VISOBJSEQ_START_CODE) {
410 : suxen_drol 252
411 :     int profile;
412 :    
413 : edgomez 1382 DPRINTF(XVID_DEBUG_STARTCODE, "<visual_object_sequence>\n");
414 : suxen_drol 252
415 : edgomez 1382 BitstreamSkip(bs, 32); /* visual_object_sequence_start_code */
416 :     profile = BitstreamGetBits(bs, 8); /* profile_and_level_indication */
417 : suxen_drol 252
418 : edgomez 1382 DPRINTF(XVID_DEBUG_HEADER, "profile_and_level_indication %i\n", profile);
419 : suxen_drol 252
420 : edgomez 195 } else if (start_code == VISOBJSEQ_STOP_CODE) {
421 : suxen_drol 252
422 : edgomez 1382 BitstreamSkip(bs, 32); /* visual_object_sequence_stop_code */
423 : suxen_drol 252
424 : edgomez 1382 DPRINTF(XVID_DEBUG_STARTCODE, "</visual_object_sequence>\n");
425 : suxen_drol 252
426 : edgomez 195 } else if (start_code == VISOBJ_START_CODE) {
427 : edgomez 851 int visobj_ver_id;
428 : suxen_drol 252
429 : edgomez 1382 DPRINTF(XVID_DEBUG_STARTCODE, "<visual_object>\n");
430 : suxen_drol 252
431 : edgomez 1382 BitstreamSkip(bs, 32); /* visual_object_start_code */
432 :     if (BitstreamGetBit(bs)) /* is_visual_object_identified */
433 : Isibaar 3 {
434 : edgomez 1382 visobj_ver_id = BitstreamGetBits(bs, 4); /* visual_object_ver_id */
435 :     DPRINTF(XVID_DEBUG_HEADER,"visobj_ver_id %i\n", visobj_ver_id);
436 :     BitstreamSkip(bs, 3); /* visual_object_priority */
437 : edgomez 195 } else {
438 : edgomez 851 visobj_ver_id = 1;
439 : Isibaar 3 }
440 :    
441 : edgomez 1382 if (BitstreamShowBits(bs, 4) != VISOBJ_TYPE_VIDEO) /* visual_object_type */
442 : Isibaar 3 {
443 : edgomez 1382 DPRINTF(XVID_DEBUG_ERROR, "visual_object_type != video\n");
444 : Isibaar 3 return -1;
445 :     }
446 :     BitstreamSkip(bs, 4);
447 :    
448 : edgomez 1382 /* video_signal_type */
449 : Isibaar 3
450 : edgomez 1382 if (BitstreamGetBit(bs)) /* video_signal_type */
451 : Isibaar 3 {
452 : edgomez 1382 DPRINTF(XVID_DEBUG_HEADER,"+ video_signal_type\n");
453 :     BitstreamSkip(bs, 3); /* video_format */
454 :     BitstreamSkip(bs, 1); /* video_range */
455 :     if (BitstreamGetBit(bs)) /* color_description */
456 : Isibaar 3 {
457 : edgomez 1382 DPRINTF(XVID_DEBUG_HEADER,"+ color_description");
458 :     BitstreamSkip(bs, 8); /* color_primaries */
459 :     BitstreamSkip(bs, 8); /* transfer_characteristics */
460 :     BitstreamSkip(bs, 8); /* matrix_coefficients */
461 : Isibaar 3 }
462 :     }
463 : suxen_drol 252 } else if ((start_code & ~VIDOBJ_START_CODE_MASK) == VIDOBJ_START_CODE) {
464 :    
465 : edgomez 1382 DPRINTF(XVID_DEBUG_STARTCODE, "<video_object>\n");
466 :     DPRINTF(XVID_DEBUG_HEADER, "vo id %i\n", start_code & VIDOBJ_START_CODE_MASK);
467 : suxen_drol 252
468 : edgomez 1382 BitstreamSkip(bs, 32); /* video_object_start_code */
469 : suxen_drol 252
470 :     } else if ((start_code & ~VIDOBJLAY_START_CODE_MASK) == VIDOBJLAY_START_CODE) {
471 :    
472 : edgomez 1382 DPRINTF(XVID_DEBUG_STARTCODE, "<video_object_layer>\n");
473 :     DPRINTF(XVID_DEBUG_HEADER, "vol id %i\n", start_code & VIDOBJLAY_START_CODE_MASK);
474 : suxen_drol 252
475 : edgomez 1382 BitstreamSkip(bs, 32); /* video_object_layer_start_code */
476 :     BitstreamSkip(bs, 1); /* random_accessible_vol */
477 : Isibaar 3
478 : edgomez 1382 BitstreamSkip(bs, 8); /* video_object_type_indication */
479 : Isibaar 3
480 : edgomez 1382 if (BitstreamGetBit(bs)) /* is_object_layer_identifier */
481 : Isibaar 3 {
482 : edgomez 1382 DPRINTF(XVID_DEBUG_HEADER, "+ is_object_layer_identifier\n");
483 :     vol_ver_id = BitstreamGetBits(bs, 4); /* video_object_layer_verid */
484 :     DPRINTF(XVID_DEBUG_HEADER,"ver_id %i\n", vol_ver_id);
485 :     BitstreamSkip(bs, 3); /* video_object_layer_priority */
486 : edgomez 195 } else {
487 : Isibaar 3 vol_ver_id = 1;
488 :     }
489 :    
490 : edgomez 851 dec->aspect_ratio = BitstreamGetBits(bs, 4);
491 :    
492 : edgomez 1382 if (dec->aspect_ratio == VIDOBJLAY_AR_EXTPAR) /* aspect_ratio_info */
493 : Isibaar 3 {
494 : edgomez 1382 DPRINTF(XVID_DEBUG_HEADER, "+ aspect_ratio_info\n");
495 :     dec->par_width = BitstreamGetBits(bs, 8); /* par_width */
496 :     dec->par_height = BitstreamGetBits(bs, 8); /* par_height */
497 : Isibaar 3 }
498 :    
499 : edgomez 1382 if (BitstreamGetBit(bs)) /* vol_control_parameters */
500 : Isibaar 3 {
501 : edgomez 1382 DPRINTF(XVID_DEBUG_HEADER, "+ vol_control_parameters\n");
502 :     BitstreamSkip(bs, 2); /* chroma_format */
503 :     dec->low_delay = BitstreamGetBit(bs); /* low_delay */
504 :     DPRINTF(XVID_DEBUG_HEADER, "low_delay %i\n", dec->low_delay);
505 :     if (BitstreamGetBit(bs)) /* vbv_parameters */
506 : Isibaar 3 {
507 : edgomez 851 unsigned int bitrate;
508 :     unsigned int buffer_size;
509 :     unsigned int occupancy;
510 :    
511 : edgomez 1382 DPRINTF(XVID_DEBUG_HEADER,"+ vbv_parameters\n");
512 : edgomez 851
513 : edgomez 1382 bitrate = BitstreamGetBits(bs,15) << 15; /* first_half_bit_rate */
514 : Isibaar 3 READ_MARKER();
515 : edgomez 1382 bitrate |= BitstreamGetBits(bs,15); /* latter_half_bit_rate */
516 : Isibaar 3 READ_MARKER();
517 : edgomez 1382
518 :     buffer_size = BitstreamGetBits(bs, 15) << 3; /* first_half_vbv_buffer_size */
519 : Isibaar 3 READ_MARKER();
520 : edgomez 1382 buffer_size |= BitstreamGetBits(bs, 3); /* latter_half_vbv_buffer_size */
521 : edgomez 851
522 : edgomez 1382 occupancy = BitstreamGetBits(bs, 11) << 15; /* first_half_vbv_occupancy */
523 : Isibaar 3 READ_MARKER();
524 : edgomez 1382 occupancy |= BitstreamGetBits(bs, 15); /* latter_half_vbv_occupancy */
525 : Isibaar 3 READ_MARKER();
526 : edgomez 195
527 : edgomez 1382 DPRINTF(XVID_DEBUG_HEADER,"bitrate %d (unit=400 bps)\n", bitrate);
528 :     DPRINTF(XVID_DEBUG_HEADER,"buffer_size %d (unit=16384 bits)\n", buffer_size);
529 :     DPRINTF(XVID_DEBUG_HEADER,"occupancy %d (unit=64 bits)\n", occupancy);
530 : Isibaar 3 }
531 : edgomez 851 }else{
532 :     dec->low_delay = dec->low_delay_default;
533 : Isibaar 3 }
534 :    
535 : edgomez 1382 dec->shape = BitstreamGetBits(bs, 2); /* video_object_layer_shape */
536 : edgomez 851
537 : edgomez 1382 DPRINTF(XVID_DEBUG_HEADER, "shape %i\n", dec->shape);
538 : edgomez 851 if (dec->shape != VIDOBJLAY_SHAPE_RECTANGULAR)
539 :     {
540 : edgomez 1382 DPRINTF(XVID_DEBUG_ERROR,"non-rectangular shapes are not supported\n");
541 : edgomez 851 }
542 : edgomez 195
543 :     if (dec->shape == VIDOBJLAY_SHAPE_GRAYSCALE && vol_ver_id != 1) {
544 : edgomez 1382 BitstreamSkip(bs, 4); /* video_object_layer_shape_extension */
545 : Isibaar 3 }
546 :    
547 :     READ_MARKER();
548 :    
549 : edgomez 1382 /********************** for decode B-frame time ***********************/
550 :     dec->time_inc_resolution = BitstreamGetBits(bs, 16); /* vop_time_increment_resolution */
551 :     DPRINTF(XVID_DEBUG_HEADER,"vop_time_increment_resolution %i\n", dec->time_inc_resolution);
552 : suxen_drol 252
553 : edgomez 1382 #if 0
554 :     dec->time_inc_resolution--;
555 :     #endif
556 : suxen_drol 252
557 : edgomez 851 if (dec->time_inc_resolution > 0) {
558 : edgomez 1466 dec->time_inc_bits = MAX(log2bin(dec->time_inc_resolution-1), 1);
559 : edgomez 195 } else {
560 : edgomez 1382 #if 0
561 :     dec->time_inc_bits = 0;
562 :     #endif
563 :     /* for "old" xvid compatibility, set time_inc_bits = 1 */
564 : Isibaar 3 dec->time_inc_bits = 1;
565 :     }
566 :    
567 :     READ_MARKER();
568 :    
569 : edgomez 1382 if (BitstreamGetBit(bs)) /* fixed_vop_rate */
570 : Isibaar 3 {
571 : edgomez 1382 DPRINTF(XVID_DEBUG_HEADER, "+ fixed_vop_rate\n");
572 :     BitstreamSkip(bs, dec->time_inc_bits); /* fixed_vop_time_increment */
573 : Isibaar 3 }
574 :    
575 : edgomez 195 if (dec->shape != VIDOBJLAY_SHAPE_BINARY_ONLY) {
576 : Isibaar 3
577 : edgomez 195 if (dec->shape == VIDOBJLAY_SHAPE_RECTANGULAR) {
578 : Isibaar 3 uint32_t width, height;
579 :    
580 :     READ_MARKER();
581 : edgomez 1382 width = BitstreamGetBits(bs, 13); /* video_object_layer_width */
582 : Isibaar 3 READ_MARKER();
583 : edgomez 1382 height = BitstreamGetBits(bs, 13); /* video_object_layer_height */
584 : Isibaar 3 READ_MARKER();
585 :    
586 : edgomez 1382 DPRINTF(XVID_DEBUG_HEADER, "width %i\n", width);
587 :     DPRINTF(XVID_DEBUG_HEADER, "height %i\n", height);
588 : suxen_drol 252
589 : edgomez 851 if (dec->width != width || dec->height != height)
590 :     {
591 :     if (dec->fixed_dimensions)
592 :     {
593 : edgomez 1382 DPRINTF(XVID_DEBUG_ERROR, "decoder width/height does not match bitstream\n");
594 : edgomez 851 return -1;
595 :     }
596 :     resize = 1;
597 : chenm001 294 dec->width = width;
598 :     dec->height = height;
599 : Isibaar 3 }
600 :     }
601 : h 69
602 : suxen_drol 252 dec->interlacing = BitstreamGetBit(bs);
603 : edgomez 1382 DPRINTF(XVID_DEBUG_HEADER, "interlacing %i\n", dec->interlacing);
604 : Isibaar 3
605 : edgomez 1382 if (!BitstreamGetBit(bs)) /* obmc_disable */
606 : Isibaar 3 {
607 : edgomez 1382 DPRINTF(XVID_DEBUG_ERROR, "obmc_disabled==false not supported\n");
608 :     /* TODO */
609 :     /* fucking divx4.02 has this enabled */
610 : Isibaar 3 }
611 :    
612 : edgomez 1382 dec->sprite_enable = BitstreamGetBits(bs, (vol_ver_id == 1 ? 1 : 2)); /* sprite_enable */
613 : edgomez 851
614 :     if (dec->sprite_enable == SPRITE_STATIC || dec->sprite_enable == SPRITE_GMC)
615 : Isibaar 3 {
616 : edgomez 851 int low_latency_sprite_enable;
617 :    
618 :     if (dec->sprite_enable != SPRITE_GMC)
619 :     {
620 :     int sprite_width;
621 :     int sprite_height;
622 :     int sprite_left_coord;
623 :     int sprite_top_coord;
624 : edgomez 1382 sprite_width = BitstreamGetBits(bs, 13); /* sprite_width */
625 : edgomez 851 READ_MARKER();
626 : edgomez 1382 sprite_height = BitstreamGetBits(bs, 13); /* sprite_height */
627 : edgomez 851 READ_MARKER();
628 : edgomez 1382 sprite_left_coord = BitstreamGetBits(bs, 13); /* sprite_left_coordinate */
629 : edgomez 851 READ_MARKER();
630 : edgomez 1382 sprite_top_coord = BitstreamGetBits(bs, 13); /* sprite_top_coordinate */
631 : edgomez 851 READ_MARKER();
632 :     }
633 : edgomez 1382 dec->sprite_warping_points = BitstreamGetBits(bs, 6); /* no_of_sprite_warping_points */
634 :     dec->sprite_warping_accuracy = BitstreamGetBits(bs, 2); /* sprite_warping_accuracy */
635 :     dec->sprite_brightness_change = BitstreamGetBits(bs, 1); /* brightness_change */
636 : edgomez 851 if (dec->sprite_enable != SPRITE_GMC)
637 :     {
638 : edgomez 1382 low_latency_sprite_enable = BitstreamGetBits(bs, 1); /* low_latency_sprite_enable */
639 : edgomez 851 }
640 : Isibaar 3 }
641 : edgomez 195
642 :     if (vol_ver_id != 1 &&
643 :     dec->shape != VIDOBJLAY_SHAPE_RECTANGULAR) {
644 : edgomez 1382 BitstreamSkip(bs, 1); /* sadct_disable */
645 : Isibaar 3 }
646 :    
647 : edgomez 1382 if (BitstreamGetBit(bs)) /* not_8_bit */
648 : Isibaar 3 {
649 : edgomez 1382 DPRINTF(XVID_DEBUG_HEADER, "not_8_bit==true (ignored)\n");
650 :     dec->quant_bits = BitstreamGetBits(bs, 4); /* quant_precision */
651 :     BitstreamSkip(bs, 4); /* bits_per_pixel */
652 : edgomez 195 } else {
653 : Isibaar 3 dec->quant_bits = 5;
654 :     }
655 :    
656 : edgomez 195 if (dec->shape == VIDOBJLAY_SHAPE_GRAYSCALE) {
657 : edgomez 1382 BitstreamSkip(bs, 1); /* no_gray_quant_update */
658 :     BitstreamSkip(bs, 1); /* composition_method */
659 :     BitstreamSkip(bs, 1); /* linear_composition */
660 : Isibaar 3 }
661 :    
662 : edgomez 1382 dec->quant_type = BitstreamGetBit(bs); /* quant_type */
663 :     DPRINTF(XVID_DEBUG_HEADER, "quant_type %i\n", dec->quant_type);
664 : Isibaar 3
665 : edgomez 195 if (dec->quant_type) {
666 : edgomez 1382 if (BitstreamGetBit(bs)) /* load_intra_quant_mat */
667 : Isibaar 3 {
668 : Isibaar 20 uint8_t matrix[64];
669 : edgomez 195
670 : edgomez 1382 DPRINTF(XVID_DEBUG_HEADER, "load_intra_quant_mat\n");
671 : suxen_drol 252
672 : Isibaar 4 bs_get_matrix(bs, matrix);
673 : edgomez 1382 set_intra_matrix(dec->mpeg_quant_matrices, matrix);
674 : edgomez 195 } else
675 : edgomez 1382 set_intra_matrix(dec->mpeg_quant_matrices, get_default_intra_matrix());
676 : Isibaar 4
677 : edgomez 1382 if (BitstreamGetBit(bs)) /* load_inter_quant_mat */
678 : Isibaar 3 {
679 : edgomez 195 uint8_t matrix[64];
680 :    
681 : edgomez 1382 DPRINTF(XVID_DEBUG_HEADER, "load_inter_quant_mat\n");
682 :    
683 : Isibaar 4 bs_get_matrix(bs, matrix);
684 : edgomez 1382 set_inter_matrix(dec->mpeg_quant_matrices, matrix);
685 : edgomez 195 } else
686 : edgomez 1382 set_inter_matrix(dec->mpeg_quant_matrices, get_default_inter_matrix());
687 : Isibaar 3
688 : edgomez 195 if (dec->shape == VIDOBJLAY_SHAPE_GRAYSCALE) {
689 : edgomez 1382 DPRINTF(XVID_DEBUG_ERROR, "greyscale matrix not supported\n");
690 : Isibaar 3 return -1;
691 :     }
692 : Isibaar 4
693 : Isibaar 3 }
694 :    
695 : edgomez 195
696 :     if (vol_ver_id != 1) {
697 : edgomez 1382 dec->quarterpel = BitstreamGetBit(bs); /* quarter_sample */
698 :     DPRINTF(XVID_DEBUG_HEADER,"quarterpel %i\n", dec->quarterpel);
699 : Isibaar 3 }
700 : Isibaar 333 else
701 :     dec->quarterpel = 0;
702 : Isibaar 3
703 : edgomez 1382
704 : edgomez 851 dec->complexity_estimation_disable = BitstreamGetBit(bs); /* complexity estimation disable */
705 :     if (!dec->complexity_estimation_disable)
706 : Isibaar 3 {
707 : edgomez 851 read_vol_complexity_estimation_header(bs, dec);
708 : Isibaar 3 }
709 :    
710 : edgomez 1382 BitstreamSkip(bs, 1); /* resync_marker_disable */
711 : Isibaar 3
712 : edgomez 1382 if (BitstreamGetBit(bs)) /* data_partitioned */
713 : Isibaar 3 {
714 : edgomez 1382 DPRINTF(XVID_DEBUG_ERROR, "data_partitioned not supported\n");
715 :     BitstreamSkip(bs, 1); /* reversible_vlc */
716 : Isibaar 3 }
717 :    
718 : edgomez 195 if (vol_ver_id != 1) {
719 : edgomez 851 dec->newpred_enable = BitstreamGetBit(bs);
720 : edgomez 1382 if (dec->newpred_enable) /* newpred_enable */
721 : Isibaar 3 {
722 : edgomez 1382 DPRINTF(XVID_DEBUG_HEADER, "+ newpred_enable\n");
723 :     BitstreamSkip(bs, 2); /* requested_upstream_message_type */
724 :     BitstreamSkip(bs, 1); /* newpred_segment_type */
725 : Isibaar 3 }
726 : edgomez 851 dec->reduced_resolution_enable = BitstreamGetBit(bs); /* reduced_resolution_vop_enable */
727 : edgomez 1382 DPRINTF(XVID_DEBUG_HEADER, "reduced_resolution_enable %i\n", dec->reduced_resolution_enable);
728 : Isibaar 3 }
729 : edgomez 851 else
730 :     {
731 :     dec->newpred_enable = 0;
732 :     dec->reduced_resolution_enable = 0;
733 :     }
734 : edgomez 195
735 : edgomez 851 dec->scalability = BitstreamGetBit(bs); /* scalability */
736 : edgomez 1382 if (dec->scalability)
737 : Isibaar 3 {
738 : edgomez 1382 DPRINTF(XVID_DEBUG_ERROR, "scalability not supported\n");
739 : edgomez 851 BitstreamSkip(bs, 1); /* hierarchy_type */
740 :     BitstreamSkip(bs, 4); /* ref_layer_id */
741 :     BitstreamSkip(bs, 1); /* ref_layer_sampling_direc */
742 :     BitstreamSkip(bs, 5); /* hor_sampling_factor_n */
743 :     BitstreamSkip(bs, 5); /* hor_sampling_factor_m */
744 :     BitstreamSkip(bs, 5); /* vert_sampling_factor_n */
745 :     BitstreamSkip(bs, 5); /* vert_sampling_factor_m */
746 :     BitstreamSkip(bs, 1); /* enhancement_type */
747 :     if(dec->shape == VIDOBJLAY_SHAPE_BINARY /* && hierarchy_type==0 */) {
748 :     BitstreamSkip(bs, 1); /* use_ref_shape */
749 :     BitstreamSkip(bs, 1); /* use_ref_texture */
750 :     BitstreamSkip(bs, 5); /* shape_hor_sampling_factor_n */
751 :     BitstreamSkip(bs, 5); /* shape_hor_sampling_factor_m */
752 :     BitstreamSkip(bs, 5); /* shape_vert_sampling_factor_n */
753 :     BitstreamSkip(bs, 5); /* shape_vert_sampling_factor_m */
754 :     }
755 : Isibaar 3 return -1;
756 :     }
757 : edgomez 1382 } else /* dec->shape == BINARY_ONLY */
758 : Isibaar 3 {
759 : edgomez 195 if (vol_ver_id != 1) {
760 : edgomez 851 dec->scalability = BitstreamGetBit(bs); /* scalability */
761 : edgomez 1382 if (dec->scalability)
762 : Isibaar 3 {
763 : edgomez 1382 DPRINTF(XVID_DEBUG_ERROR, "scalability not supported\n");
764 : edgomez 851 BitstreamSkip(bs, 4); /* ref_layer_id */
765 :     BitstreamSkip(bs, 5); /* hor_sampling_factor_n */
766 :     BitstreamSkip(bs, 5); /* hor_sampling_factor_m */
767 :     BitstreamSkip(bs, 5); /* vert_sampling_factor_n */
768 :     BitstreamSkip(bs, 5); /* vert_sampling_factor_m */
769 : Isibaar 3 return -1;
770 :     }
771 :     }
772 : edgomez 1382 BitstreamSkip(bs, 1); /* resync_marker_disable */
773 : Isibaar 3
774 :     }
775 :    
776 : edgomez 851 return (resize ? -3 : -2 ); /* VOL */
777 :    
778 : edgomez 195 } else if (start_code == GRPOFVOP_START_CODE) {
779 : suxen_drol 252
780 : edgomez 1382 DPRINTF(XVID_DEBUG_STARTCODE, "<group_of_vop>\n");
781 : suxen_drol 252
782 : Isibaar 3 BitstreamSkip(bs, 32);
783 :     {
784 :     int hours, minutes, seconds;
785 : edgomez 195
786 : Isibaar 3 hours = BitstreamGetBits(bs, 5);
787 :     minutes = BitstreamGetBits(bs, 6);
788 :     READ_MARKER();
789 :     seconds = BitstreamGetBits(bs, 6);
790 : edgomez 1382
791 :     DPRINTF(XVID_DEBUG_HEADER, "time %ih%im%is\n", hours,minutes,seconds);
792 : Isibaar 3 }
793 : edgomez 1382 BitstreamSkip(bs, 1); /* closed_gov */
794 :     BitstreamSkip(bs, 1); /* broken_link */
795 : suxen_drol 252
796 : edgomez 195 } else if (start_code == VOP_START_CODE) {
797 : suxen_drol 252
798 : edgomez 1382 DPRINTF(XVID_DEBUG_STARTCODE, "<vop>\n");
799 : suxen_drol 252
800 : edgomez 1382 BitstreamSkip(bs, 32); /* vop_start_code */
801 : Isibaar 3
802 : edgomez 1382 coding_type = BitstreamGetBits(bs, 2); /* vop_coding_type */
803 :     DPRINTF(XVID_DEBUG_HEADER, "coding_type %i\n", coding_type);
804 : Isibaar 3
805 : edgomez 1382 /*********************** for decode B-frame time ***********************/
806 :     while (BitstreamGetBit(bs) != 0) /* time_base */
807 : chenm001 156 time_incr++;
808 : edgomez 195
809 : Isibaar 3 READ_MARKER();
810 : edgomez 195
811 :     if (dec->time_inc_bits) {
812 : edgomez 1382 time_increment = (BitstreamGetBits(bs, dec->time_inc_bits)); /* vop_time_increment */
813 : Isibaar 3 }
814 : suxen_drol 240
815 : edgomez 1382 DPRINTF(XVID_DEBUG_HEADER, "time_base %i\n", time_incr);
816 :     DPRINTF(XVID_DEBUG_HEADER, "time_increment %i\n", time_increment);
817 : suxen_drol 252
818 : edgomez 1382 DPRINTF(XVID_DEBUG_TIMECODE, "%c %i:%i\n",
819 : edgomez 851 coding_type == I_VOP ? 'I' : coding_type == P_VOP ? 'P' : coding_type == B_VOP ? 'B' : 'S',
820 : suxen_drol 240 time_incr, time_increment);
821 :    
822 : edgomez 195 if (coding_type != B_VOP) {
823 :     dec->last_time_base = dec->time_base;
824 : chenm001 156 dec->time_base += time_incr;
825 : edgomez 1466 dec->time = dec->time_base*dec->time_inc_resolution + time_increment;
826 :     dec->time_pp = (int32_t)(dec->time - dec->last_non_b_time);
827 : edgomez 195 dec->last_non_b_time = dec->time;
828 :     } else {
829 : edgomez 1466 dec->time = (dec->last_time_base + time_incr)*dec->time_inc_resolution + time_increment;
830 :     dec->time_bp = dec->time_pp - (int32_t)(dec->last_non_b_time - dec->time);
831 : chenm001 156 }
832 : edgomez 1382 DPRINTF(XVID_DEBUG_HEADER,"time_pp=%i\n", dec->time_pp);
833 :     DPRINTF(XVID_DEBUG_HEADER,"time_bp=%i\n", dec->time_bp);
834 : Isibaar 3
835 :     READ_MARKER();
836 :    
837 : edgomez 1382 if (!BitstreamGetBit(bs)) /* vop_coded */
838 : Isibaar 3 {
839 : edgomez 1382 DPRINTF(XVID_DEBUG_HEADER, "vop_coded==false\n");
840 : Isibaar 3 return N_VOP;
841 :     }
842 :    
843 : edgomez 851 if (dec->newpred_enable)
844 :     {
845 :     int vop_id;
846 :     int vop_id_for_prediction;
847 : edgomez 1382
848 : edgomez 851 vop_id = BitstreamGetBits(bs, MIN(dec->time_inc_bits + 3, 15));
849 : edgomez 1382 DPRINTF(XVID_DEBUG_HEADER, "vop_id %i\n", vop_id);
850 : edgomez 851 if (BitstreamGetBit(bs)) /* vop_id_for_prediction_indication */
851 :     {
852 :     vop_id_for_prediction = BitstreamGetBits(bs, MIN(dec->time_inc_bits + 3, 15));
853 : edgomez 1382 DPRINTF(XVID_DEBUG_HEADER, "vop_id_for_prediction %i\n", vop_id_for_prediction);
854 : edgomez 851 }
855 :     READ_MARKER();
856 :     }
857 : Isibaar 3
858 : edgomez 851
859 : edgomez 1382
860 :     /* fix a little bug by MinChen <chenm002@163.com> */
861 : edgomez 195 if ((dec->shape != VIDOBJLAY_SHAPE_BINARY_ONLY) &&
862 : edgomez 851 ( (coding_type == P_VOP) || (coding_type == S_VOP && dec->sprite_enable == SPRITE_GMC) ) ) {
863 : edgomez 1382 *rounding = BitstreamGetBit(bs); /* rounding_type */
864 :     DPRINTF(XVID_DEBUG_HEADER, "rounding %i\n", *rounding);
865 : Isibaar 3 }
866 :    
867 : edgomez 851 if (dec->reduced_resolution_enable &&
868 :     dec->shape == VIDOBJLAY_SHAPE_RECTANGULAR &&
869 :     (coding_type == P_VOP || coding_type == I_VOP)) {
870 : Isibaar 3
871 : syskin 1566 if (BitstreamGetBit(bs));
872 :     DPRINTF(XVID_DEBUG_ERROR, "RRV not supported (anymore)\n");
873 : edgomez 851 }
874 :    
875 : edgomez 195 if (dec->shape != VIDOBJLAY_SHAPE_RECTANGULAR) {
876 : edgomez 851 if(!(dec->sprite_enable == SPRITE_STATIC && coding_type == I_VOP)) {
877 : edgomez 195
878 : edgomez 851 uint32_t width, height;
879 :     uint32_t horiz_mc_ref, vert_mc_ref;
880 : Isibaar 3
881 : edgomez 851 width = BitstreamGetBits(bs, 13);
882 :     READ_MARKER();
883 :     height = BitstreamGetBits(bs, 13);
884 :     READ_MARKER();
885 :     horiz_mc_ref = BitstreamGetBits(bs, 13);
886 :     READ_MARKER();
887 :     vert_mc_ref = BitstreamGetBits(bs, 13);
888 :     READ_MARKER();
889 : Isibaar 3
890 : edgomez 1382 DPRINTF(XVID_DEBUG_HEADER, "width %i\n", width);
891 :     DPRINTF(XVID_DEBUG_HEADER, "height %i\n", height);
892 :     DPRINTF(XVID_DEBUG_HEADER, "horiz_mc_ref %i\n", horiz_mc_ref);
893 :     DPRINTF(XVID_DEBUG_HEADER, "vert_mc_ref %i\n", vert_mc_ref);
894 : edgomez 851 }
895 :    
896 : edgomez 1382 BitstreamSkip(bs, 1); /* change_conv_ratio_disable */
897 :     if (BitstreamGetBit(bs)) /* vop_constant_alpha */
898 : Isibaar 3 {
899 : edgomez 1382 BitstreamSkip(bs, 8); /* vop_constant_alpha_value */
900 : Isibaar 3 }
901 :     }
902 :    
903 : edgomez 851 if (dec->shape != VIDOBJLAY_SHAPE_BINARY_ONLY) {
904 : edgomez 195
905 : edgomez 851 if (!dec->complexity_estimation_disable)
906 :     {
907 :     read_vop_complexity_estimation_header(bs, dec, coding_type);
908 :     }
909 :    
910 : edgomez 1382 /* intra_dc_vlc_threshold */
911 : edgomez 195 *intra_dc_threshold =
912 :     intra_dc_threshold_table[BitstreamGetBits(bs, 3)];
913 : Isibaar 3
914 : edgomez 851 dec->top_field_first = 0;
915 :     dec->alternate_vertical_scan = 0;
916 :    
917 : edgomez 195 if (dec->interlacing) {
918 : suxen_drol 252 dec->top_field_first = BitstreamGetBit(bs);
919 : edgomez 1382 DPRINTF(XVID_DEBUG_HEADER, "interlace top_field_first %i\n", dec->top_field_first);
920 : suxen_drol 252 dec->alternate_vertical_scan = BitstreamGetBit(bs);
921 : edgomez 1382 DPRINTF(XVID_DEBUG_HEADER, "interlace alternate_vertical_scan %i\n", dec->alternate_vertical_scan);
922 :    
923 : h 69 }
924 : Isibaar 3 }
925 : edgomez 195
926 : edgomez 851 if ((dec->sprite_enable == SPRITE_STATIC || dec->sprite_enable== SPRITE_GMC) && coding_type == S_VOP) {
927 :    
928 :     int i;
929 :    
930 :     for (i = 0 ; i < dec->sprite_warping_points; i++)
931 :     {
932 :     int length;
933 :     int x = 0, y = 0;
934 :    
935 :     /* sprite code borowed from ffmpeg; thx Michael Niedermayer <michaelni@gmx.at> */
936 :     length = bs_get_spritetrajectory(bs);
937 :     if(length){
938 :     x= BitstreamGetBits(bs, length);
939 :     if ((x >> (length - 1)) == 0) /* if MSB not set it is negative*/
940 :     x = - (x ^ ((1 << length) - 1));
941 :     }
942 :     READ_MARKER();
943 : edgomez 1382
944 : edgomez 851 length = bs_get_spritetrajectory(bs);
945 :     if(length){
946 :     y = BitstreamGetBits(bs, length);
947 :     if ((y >> (length - 1)) == 0) /* if MSB not set it is negative*/
948 :     y = - (y ^ ((1 << length) - 1));
949 :     }
950 :     READ_MARKER();
951 :    
952 :     gmc_warp->duv[i].x = x;
953 :     gmc_warp->duv[i].y = y;
954 :    
955 : edgomez 1382 DPRINTF(XVID_DEBUG_HEADER,"sprite_warping_point[%i] xy=(%i,%i)\n", i, x, y);
956 : edgomez 851 }
957 :    
958 :     if (dec->sprite_brightness_change)
959 :     {
960 : edgomez 1382 /* XXX: brightness_change_factor() */
961 : edgomez 851 }
962 :     if (dec->sprite_enable == SPRITE_STATIC)
963 :     {
964 : edgomez 1382 /* XXX: todo */
965 : edgomez 851 }
966 :    
967 :     }
968 :    
969 : edgomez 1382 if ((*quant = BitstreamGetBits(bs, dec->quant_bits)) < 1) /* vop_quant */
970 : Isibaar 157 *quant = 1;
971 : edgomez 1382 DPRINTF(XVID_DEBUG_HEADER, "quant %i\n", *quant);
972 : edgomez 195
973 :     if (coding_type != I_VOP) {
974 : edgomez 1382 *fcode_forward = BitstreamGetBits(bs, 3); /* fcode_forward */
975 :     DPRINTF(XVID_DEBUG_HEADER, "fcode_forward %i\n", *fcode_forward);
976 : Isibaar 3 }
977 : edgomez 195
978 :     if (coding_type == B_VOP) {
979 : edgomez 1382 *fcode_backward = BitstreamGetBits(bs, 3); /* fcode_backward */
980 :     DPRINTF(XVID_DEBUG_HEADER, "fcode_backward %i\n", *fcode_backward);
981 : Isibaar 3 }
982 : edgomez 195 if (!dec->scalability) {
983 :     if ((dec->shape != VIDOBJLAY_SHAPE_RECTANGULAR) &&
984 :     (coding_type != I_VOP)) {
985 : edgomez 1382 BitstreamSkip(bs, 1); /* vop_shape_coding_type */
986 : chenm001 156 }
987 :     }
988 : Isibaar 3 return coding_type;
989 : suxen_drol 252
990 : edgomez 195 } else if (start_code == USERDATA_START_CODE) {
991 : edgomez 851 char tmp[256];
992 :     int i, version, build;
993 :     char packed;
994 : suxen_drol 252
995 : edgomez 1382 BitstreamSkip(bs, 32); /* user_data_start_code */
996 : suxen_drol 252
997 : edgomez 1547 memset(tmp, 0, 256);
998 : edgomez 851 tmp[0] = BitstreamShowBits(bs, 8);
999 : edgomez 1382
1000 : edgomez 851 for(i = 1; i < 256; i++){
1001 :     tmp[i] = (BitstreamShowBits(bs, 16) & 0xFF);
1002 : edgomez 1382
1003 :     if(tmp[i] == 0)
1004 : edgomez 851 break;
1005 : edgomez 1382
1006 : edgomez 851 BitstreamSkip(bs, 8);
1007 :     }
1008 : suxen_drol 252
1009 : edgomez 1382 DPRINTF(XVID_DEBUG_STARTCODE, "<user_data>: %s\n", tmp);
1010 :    
1011 : Isibaar 1055 /* read xvid bitstream version */
1012 :     if(strncmp(tmp, "XviD", 4) == 0) {
1013 : edgomez 1382 if (tmp[strlen(tmp)-1] == 'C') {
1014 :     sscanf(tmp, "XviD%dC", &dec->bs_version);
1015 :     dec->cartoon_mode = 1;
1016 :     }
1017 :     else
1018 :     sscanf(tmp, "XviD%d", &dec->bs_version);
1019 :    
1020 : edgomez 1466 DPRINTF(XVID_DEBUG_HEADER, "xvid bitstream version=%i\n", dec->bs_version);
1021 : Isibaar 1055 }
1022 : edgomez 851
1023 :     /* divx detection */
1024 :     i = sscanf(tmp, "DivX%dBuild%d%c", &version, &build, &packed);
1025 :     if (i < 2)
1026 :     i = sscanf(tmp, "DivX%db%d%c", &version, &build, &packed);
1027 : edgomez 1382
1028 : edgomez 851 if (i >= 2)
1029 :     {
1030 :     dec->packed_mode = (i == 3 && packed == 'p');
1031 : edgomez 1382 DPRINTF(XVID_DEBUG_HEADER, "divx version=%i, build=%i packed=%i\n",
1032 : edgomez 851 version, build, dec->packed_mode);
1033 :     }
1034 :    
1035 : edgomez 1382 } else /* start_code == ? */
1036 : Isibaar 3 {
1037 : edgomez 195 if (BitstreamShowBits(bs, 24) == 0x000001) {
1038 : edgomez 1382 DPRINTF(XVID_DEBUG_STARTCODE, "<unknown: %x>\n", BitstreamShowBits(bs, 32));
1039 : Isibaar 3 }
1040 :     BitstreamSkip(bs, 8);
1041 :     }
1042 :     }
1043 :    
1044 : edgomez 1382 #if 0
1045 :     DPRINTF("*** WARNING: no vop_start_code found");
1046 :     #endif
1047 : edgomez 195 return -1; /* ignore it */
1048 : Isibaar 3 }
1049 :    
1050 :    
1051 :     /* write custom quant matrix */
1052 :    
1053 : edgomez 195 static void
1054 :     bs_put_matrix(Bitstream * bs,
1055 : edgomez 1382 const uint16_t * matrix)
1056 : Isibaar 3 {
1057 :     int i, j;
1058 :     const int last = matrix[scan_tables[0][63]];
1059 :    
1060 : suxen_drol 233 for (j = 63; j > 0 && matrix[scan_tables[0][j - 1]] == last; j--);
1061 : Isibaar 3
1062 : edgomez 195 for (i = 0; i <= j; i++) {
1063 : Isibaar 3 BitstreamPutBits(bs, matrix[scan_tables[0][i]], 8);
1064 :     }
1065 :    
1066 : edgomez 195 if (j < 63) {
1067 : Isibaar 3 BitstreamPutBits(bs, 0, 8);
1068 :     }
1069 :     }
1070 :    
1071 :    
1072 :     /*
1073 :     write vol header
1074 :     */
1075 : edgomez 195 void
1076 :     BitstreamWriteVolHeader(Bitstream * const bs,
1077 :     const MBParam * pParam,
1078 : edgomez 851 const FRAMEINFO * const frame)
1079 : Isibaar 3 {
1080 : edgomez 851 static const unsigned int vo_id = 0;
1081 :     static const unsigned int vol_id = 0;
1082 : edgomez 1382 int vol_ver_id = 1;
1083 :     int vol_type_ind = VIDOBJLAY_TYPE_SIMPLE;
1084 :     int vol_profile = pParam->profile;
1085 : edgomez 851
1086 : edgomez 1382 if ( (pParam->vol_flags & XVID_VOL_QUARTERPEL) ||
1087 :     (pParam->vol_flags & XVID_VOL_GMC) ||
1088 :     (pParam->vol_flags & XVID_VOL_REDUCED_ENABLE))
1089 : edgomez 851 vol_ver_id = 2;
1090 :    
1091 : edgomez 1382 if ((pParam->vol_flags & XVID_VOL_REDUCED_ENABLE)) {
1092 :     vol_type_ind = VIDOBJLAY_TYPE_ART_SIMPLE;
1093 :     }
1094 : edgomez 851
1095 : suxen_drol 1610 if ((pParam->vol_flags & (XVID_VOL_MPEGQUANT|XVID_VOL_QUARTERPEL|XVID_VOL_GMC|XVID_VOL_INTERLACING)) ||
1096 :     pParam->max_bframes>0) {
1097 : edgomez 1382 vol_type_ind = VIDOBJLAY_TYPE_ASP;
1098 :     }
1099 : edgomez 851
1100 : edgomez 1382 /* visual_object_sequence_start_code */
1101 :     #if 0
1102 :     BitstreamPad(bs);
1103 :     #endif
1104 : edgomez 851
1105 : edgomez 1382 /*
1106 :     * no padding here, anymore. You have to make sure that you are
1107 :     * byte aligned, and that always 1-8 padding bits have been written
1108 :     */
1109 :    
1110 :     if (!vol_profile) {
1111 :     /* Profile was not set by client app, use the more permissive profile
1112 :     * compatible with the vol_type_id */
1113 :     switch(vol_type_ind) {
1114 :     case VIDOBJLAY_TYPE_ASP:
1115 :     vol_profile = 0xf5; /* ASP level 5 */
1116 :     break;
1117 :     case VIDOBJLAY_TYPE_ART_SIMPLE:
1118 :     vol_profile = 0x94; /* ARTS level 4 */
1119 :     break;
1120 :     default:
1121 :     vol_profile = 0x03; /* Simple level 3 */
1122 :     break;
1123 :     }
1124 :     }
1125 :    
1126 :     /* Write the VOS header */
1127 : edgomez 851 BitstreamPutBits(bs, VISOBJSEQ_START_CODE, 32);
1128 : edgomez 1382 BitstreamPutBits(bs, vol_profile, 8); /* profile_and_level_indication */
1129 : edgomez 851
1130 : edgomez 1382
1131 :     /* visual_object_start_code */
1132 : edgomez 195 BitstreamPad(bs);
1133 : edgomez 851 BitstreamPutBits(bs, VISOBJ_START_CODE, 32);
1134 : edgomez 1382 BitstreamPutBits(bs, 0, 1); /* is_visual_object_identifier */
1135 : edgomez 1098
1136 :     /* Video type */
1137 : edgomez 1382 BitstreamPutBits(bs, VISOBJ_TYPE_VIDEO, 4); /* visual_object_type */
1138 : edgomez 1098 BitstreamPutBit(bs, 0); /* video_signal_type */
1139 :    
1140 : edgomez 1382 /* video object_start_code & vo_id */
1141 :     BitstreamPadAlways(bs); /* next_start_code() */
1142 : edgomez 851 BitstreamPutBits(bs, VIDOBJ_START_CODE|(vo_id&0x5), 32);
1143 : Isibaar 3
1144 : edgomez 1382 /* video_object_layer_start_code & vol_id */
1145 : edgomez 851 BitstreamPad(bs);
1146 :     BitstreamPutBits(bs, VIDOBJLAY_START_CODE|(vol_id&0x4), 32);
1147 : Isibaar 3
1148 : edgomez 1382 BitstreamPutBit(bs, 0); /* random_accessible_vol */
1149 :     BitstreamPutBits(bs, vol_type_ind, 8); /* video_object_type_indication */
1150 : suxen_drol 164
1151 : edgomez 1382 if (vol_ver_id == 1) {
1152 :     BitstreamPutBit(bs, 0); /* is_object_layer_identified (0=not given) */
1153 :     } else {
1154 :     BitstreamPutBit(bs, 1); /* is_object_layer_identified */
1155 :     BitstreamPutBits(bs, vol_ver_id, 4); /* vol_ver_id == 2 */
1156 :     BitstreamPutBits(bs, 4, 3); /* vol_ver_priority (1==highest, 7==lowest) */
1157 : edgomez 851 }
1158 : edgomez 1382
1159 :     /* Aspect ratio */
1160 :     BitstreamPutBits(bs, pParam->par, 4); /* aspect_ratio_info (1=1:1) */
1161 :     if(pParam->par == XVID_PAR_EXT) {
1162 :     BitstreamPutBits(bs, pParam->par_width, 8);
1163 :     BitstreamPutBits(bs, pParam->par_height, 8);
1164 : edgomez 851 }
1165 : chl 387
1166 : edgomez 1382 BitstreamPutBit(bs, 1); /* vol_control_parameters */
1167 :     BitstreamPutBits(bs, 1, 2); /* chroma_format 1="4:2:0" */
1168 : edgomez 487
1169 : edgomez 851 if (pParam->max_bframes > 0) {
1170 : edgomez 1382 BitstreamPutBit(bs, 0); /* low_delay */
1171 : edgomez 851 } else
1172 :     {
1173 : edgomez 1382 BitstreamPutBit(bs, 1); /* low_delay */
1174 : edgomez 851 }
1175 : edgomez 1382 BitstreamPutBit(bs, 0); /* vbv_parameters (0=not given) */
1176 : Isibaar 3
1177 : edgomez 1382 BitstreamPutBits(bs, 0, 2); /* video_object_layer_shape (0=rectangular) */
1178 : edgomez 851
1179 : Isibaar 3 WRITE_MARKER();
1180 : edgomez 195
1181 : edgomez 1382 /*
1182 :     * time_inc_resolution; ignored by current decore versions
1183 :     * eg. 2fps res=2 inc=1
1184 :     * 25fps res=25 inc=1
1185 :     * 29.97fps res=30000 inc=1001
1186 : edgomez 195 */
1187 : suxen_drol 163 BitstreamPutBits(bs, pParam->fbase, 16);
1188 : Isibaar 3
1189 :     WRITE_MARKER();
1190 :    
1191 : edgomez 1382 if (pParam->fincr>0) {
1192 : edgomez 1451 BitstreamPutBit(bs, 1); /* fixed_vop_rate = 1 */
1193 :     BitstreamPutBits(bs, pParam->fincr, MAX(log2bin(pParam->fbase-1),1)); /* fixed_vop_time_increment */
1194 : edgomez 1382 }else{
1195 :     BitstreamPutBit(bs, 0); /* fixed_vop_rate = 0 */
1196 :     }
1197 : Isibaar 3
1198 :     WRITE_MARKER();
1199 : edgomez 1382 BitstreamPutBits(bs, pParam->width, 13); /* width */
1200 : Isibaar 3 WRITE_MARKER();
1201 : edgomez 1382 BitstreamPutBits(bs, pParam->height, 13); /* height */
1202 : Isibaar 3 WRITE_MARKER();
1203 : edgomez 195
1204 : edgomez 1382 BitstreamPutBit(bs, pParam->vol_flags & XVID_VOL_INTERLACING); /* interlace */
1205 :     BitstreamPutBit(bs, 1); /* obmc_disable (overlapped block motion compensation) */
1206 : Isibaar 3
1207 : edgomez 1382 if (vol_ver_id != 1)
1208 :     { if ((pParam->vol_flags & XVID_VOL_GMC))
1209 :     { BitstreamPutBits(bs, 2, 2); /* sprite_enable=='GMC' */
1210 :     BitstreamPutBits(bs, 3, 6); /* no_of_sprite_warping_points */
1211 :     BitstreamPutBits(bs, 3, 2); /* sprite_warping_accuracy 0==1/2, 1=1/4, 2=1/8, 3=1/16 */
1212 :     BitstreamPutBit(bs, 0); /* sprite_brightness_change (not supported) */
1213 : edgomez 851
1214 : edgomez 1382 /*
1215 :     * currently we use no_of_sprite_warping_points==2, sprite_warping_accuracy==3
1216 :     * for DivX5 compatability
1217 :     */
1218 : edgomez 851
1219 :     } else
1220 : edgomez 1382 BitstreamPutBits(bs, 0, 2); /* sprite_enable==off */
1221 : edgomez 851 }
1222 :     else
1223 : edgomez 1382 BitstreamPutBit(bs, 0); /* sprite_enable==off */
1224 : edgomez 851
1225 : edgomez 1382 BitstreamPutBit(bs, 0); /* not_8_bit */
1226 : edgomez 851
1227 : edgomez 1382 /* quant_type 0=h.263 1=mpeg4(quantizer tables) */
1228 :     BitstreamPutBit(bs, pParam->vol_flags & XVID_VOL_MPEGQUANT);
1229 : edgomez 195
1230 : edgomez 1382 if ((pParam->vol_flags & XVID_VOL_MPEGQUANT)) {
1231 :     BitstreamPutBit(bs, is_custom_intra_matrix(pParam->mpeg_quant_matrices)); /* load_intra_quant_mat */
1232 :     if(is_custom_intra_matrix(pParam->mpeg_quant_matrices))
1233 :     bs_put_matrix(bs, get_intra_matrix(pParam->mpeg_quant_matrices));
1234 : Isibaar 3
1235 : edgomez 1382 BitstreamPutBit(bs, is_custom_inter_matrix(pParam->mpeg_quant_matrices)); /* load_inter_quant_mat */
1236 :     if(is_custom_inter_matrix(pParam->mpeg_quant_matrices))
1237 :     bs_put_matrix(bs, get_inter_matrix(pParam->mpeg_quant_matrices));
1238 : Isibaar 3 }
1239 :    
1240 : edgomez 851 if (vol_ver_id != 1) {
1241 : edgomez 1382 if ((pParam->vol_flags & XVID_VOL_QUARTERPEL))
1242 :     BitstreamPutBit(bs, 1); /* quarterpel */
1243 : edgomez 851 else
1244 : edgomez 1382 BitstreamPutBit(bs, 0); /* no quarterpel */
1245 : edgomez 851 }
1246 :    
1247 : edgomez 1382 BitstreamPutBit(bs, 1); /* complexity_estimation_disable */
1248 :     BitstreamPutBit(bs, 1); /* resync_marker_disable */
1249 :     BitstreamPutBit(bs, 0); /* data_partitioned */
1250 : edgomez 851
1251 : edgomez 1382 if (vol_ver_id != 1) {
1252 :     BitstreamPutBit(bs, 0); /* newpred_enable */
1253 :     BitstreamPutBit(bs, (pParam->vol_flags & XVID_VOL_REDUCED_ENABLE)?1:0);
1254 : edgomez 851 /* reduced_resolution_vop_enabled */
1255 :     }
1256 :    
1257 : edgomez 1382 BitstreamPutBit(bs, 0); /* scalability */
1258 : edgomez 1098
1259 : edgomez 1382 BitstreamPadAlways(bs); /* next_start_code(); */
1260 :    
1261 : suxen_drol 1607 /* divx5 userdata string */
1262 :     #define DIVX5_ID "DivX503b1393"
1263 :     if ((pParam->global_flags & XVID_GLOBAL_DIVX5_USERDATA)) {
1264 :     BitstreamWriteUserData(bs, DIVX5_ID, strlen(DIVX5_ID));
1265 :     if (pParam->max_bframes > 0 && (pParam->global_flags & XVID_GLOBAL_PACKED))
1266 :     BitstreamPutBits(bs, 'p', 8);
1267 : edgomez 851 }
1268 :    
1269 :     /* xvid id */
1270 : edgomez 1382 {
1271 : edgomez 1451 const char xvid_user_format[] = "XviD%04d%c";
1272 :     char xvid_user_data[100];
1273 :     sprintf(xvid_user_data,
1274 :     xvid_user_format,
1275 :     XVID_BS_VERSION,
1276 :     (frame->vop_flags & XVID_VOP_CARTOON)?'C':'\0');
1277 :     BitstreamWriteUserData(bs, xvid_user_data, strlen(xvid_user_data));
1278 : edgomez 1382 }
1279 : Isibaar 3 }
1280 :    
1281 :    
1282 :     /*
1283 :     write vop header
1284 :     */
1285 : edgomez 195 void
1286 : edgomez 851 BitstreamWriteVopHeader(
1287 :     Bitstream * const bs,
1288 : edgomez 195 const MBParam * pParam,
1289 : edgomez 851 const FRAMEINFO * const frame,
1290 : edgomez 1382 int vop_coded,
1291 :     unsigned int quant)
1292 : Isibaar 3 {
1293 : suxen_drol 152 uint32_t i;
1294 : chl 387
1295 : edgomez 1382 #if 0
1296 :     BitstreamPad(bs);
1297 :     #endif
1298 : edgomez 851
1299 : edgomez 1382 /*
1300 :     * no padding here, anymore. You have to make sure that you are
1301 :     * byte aligned, and that always 1-8 padding bits have been written
1302 :     */
1303 :    
1304 : edgomez 195 BitstreamPutBits(bs, VOP_START_CODE, 32);
1305 : Isibaar 3
1306 : edgomez 195 BitstreamPutBits(bs, frame->coding_type, 2);
1307 : edgomez 1382 #if 0
1308 :     DPRINTF(XVID_DEBUG_HEADER, "coding_type = %i\n", frame->coding_type);
1309 :     #endif
1310 : edgomez 195
1311 :     for (i = 0; i < frame->seconds; i++) {
1312 : suxen_drol 152 BitstreamPutBit(bs, 1);
1313 :     }
1314 :     BitstreamPutBit(bs, 0);
1315 : Isibaar 3
1316 :     WRITE_MARKER();
1317 :    
1318 : edgomez 1382 /* time_increment: value=nth_of_sec, nbits = log2(resolution) */
1319 : edgomez 1451 BitstreamPutBits(bs, frame->ticks, MAX(log2bin(pParam->fbase-1), 1));
1320 : edgomez 1382 #if 0
1321 :     DPRINTF("[%i:%i] %c",
1322 :     frame->seconds, frame->ticks,
1323 :     frame->coding_type == I_VOP ? 'I' :
1324 :     frame->coding_type == P_VOP ? 'P' :
1325 :     frame->coding_type == S_VOP ? 'S' : 'B');
1326 :     #endif
1327 : Isibaar 3
1328 :     WRITE_MARKER();
1329 :    
1330 : suxen_drol 229 if (!vop_coded) {
1331 :     BitstreamPutBits(bs, 0, 1);
1332 : edgomez 1098 #if 0
1333 :     BitstreamPadAlways(bs); /* next_start_code() */
1334 :     #endif
1335 :     /* NB: It's up to the function caller to write the next_start_code().
1336 :     * At the moment encoder.c respects that requisite because a VOP
1337 :     * always ends with a next_start_code either if it's coded or not
1338 :     * and encoder.c terminates a frame with a next_start_code in whatever
1339 :     * case */
1340 : suxen_drol 229 return;
1341 :     }
1342 :    
1343 : edgomez 1382 BitstreamPutBits(bs, 1, 1); /* vop_coded */
1344 : Isibaar 3
1345 : edgomez 851 if ( (frame->coding_type == P_VOP) || (frame->coding_type == S_VOP) )
1346 : suxen_drol 136 BitstreamPutBits(bs, frame->rounding_type, 1);
1347 : Isibaar 3
1348 : edgomez 1382 if ((frame->vol_flags & XVID_VOL_REDUCED_ENABLE))
1349 : syskin 1566 BitstreamPutBit(bs, 0);
1350 : edgomez 195
1351 : edgomez 1382 BitstreamPutBits(bs, 0, 3); /* intra_dc_vlc_threshold */
1352 : edgomez 851
1353 : edgomez 1382 if ((frame->vol_flags & XVID_VOL_INTERLACING)) {
1354 :     BitstreamPutBit(bs, (frame->vop_flags & XVID_VOP_TOPFIELDFIRST));
1355 :     BitstreamPutBit(bs, (frame->vop_flags & XVID_VOP_ALTERNATESCAN));
1356 : h 69 }
1357 : edgomez 1382
1358 : edgomez 851 if (frame->coding_type == S_VOP) {
1359 : edgomez 1382 if (1) { /* no_of_sprite_warping_points>=1 (we use 2!) */
1360 : edgomez 851 int k;
1361 : edgomez 1382 for (k=0;k<3;k++)
1362 : edgomez 851 {
1363 : edgomez 1382 bs_put_spritetrajectory(bs, frame->warp.duv[k].x ); /* du[k] */
1364 : edgomez 851 WRITE_MARKER();
1365 : edgomez 1382
1366 :     bs_put_spritetrajectory(bs, frame->warp.duv[k].y ); /* dv[k] */
1367 : edgomez 851 WRITE_MARKER();
1368 : h 69
1369 : edgomez 1382 if ((frame->vol_flags & XVID_VOL_QUARTERPEL))
1370 : edgomez 851 {
1371 : edgomez 1382 DPRINTF(XVID_DEBUG_HEADER,"sprite_warping_point[%i] xy=(%i,%i) *QPEL*\n", k, frame->warp.duv[k].x/2, frame->warp.duv[k].y/2);
1372 : edgomez 851 }
1373 :     else
1374 :     {
1375 : edgomez 1382 DPRINTF(XVID_DEBUG_HEADER,"sprite_warping_point[%i] xy=(%i,%i)\n", k, frame->warp.duv[k].x, frame->warp.duv[k].y);
1376 : edgomez 851 }
1377 :     }
1378 :     }
1379 :     }
1380 : edgomez 195
1381 : edgomez 851
1382 : edgomez 1382 #if 0
1383 :     DPRINTF(XVID_DEBUG_HEADER, "quant = %i\n", quant);
1384 :     #endif
1385 : edgomez 851
1386 : edgomez 1382 BitstreamPutBits(bs, quant, 5); /* quantizer */
1387 :    
1388 : suxen_drol 136 if (frame->coding_type != I_VOP)
1389 : edgomez 1382 BitstreamPutBits(bs, frame->fcode, 3); /* forward_fixed_code */
1390 : suxen_drol 152
1391 :     if (frame->coding_type == B_VOP)
1392 : edgomez 1382 BitstreamPutBits(bs, frame->bcode, 3); /* backward_fixed_code */
1393 : suxen_drol 152
1394 : Isibaar 3 }
1395 : edgomez 851
1396 : edgomez 1382 void
1397 :     BitstreamWriteUserData(Bitstream * const bs,
1398 :     uint8_t * data,
1399 : edgomez 851 const int length)
1400 :     {
1401 :     int i;
1402 :    
1403 :     BitstreamPad(bs);
1404 :     BitstreamPutBits(bs, USERDATA_START_CODE, 32);
1405 :    
1406 :     for (i = 0; i < length; i++) {
1407 :     BitstreamPutBits(bs, data[i], 8);
1408 :     }
1409 :    
1410 :     }
1411 : Skal 1616
1412 :     /*
1413 :     * Group of VOP
1414 :     */
1415 :     void
1416 :     BitstreamWriteGroupOfVopHeader(Bitstream * const bs,
1417 :     const MBParam * pParam,
1418 :     uint32_t is_closed_gov)
1419 :     {
1420 :     int64_t time = (pParam->m_stamp + (pParam->fbase/2)) / pParam->fbase;
1421 :     int hours, minutes, seconds;
1422 :    
1423 :     /* compute time_code */
1424 :     seconds = time % 60; time /= 60;
1425 :     minutes = time % 60; time /= 60;
1426 :     hours = time % 24; /* don't overflow */
1427 :    
1428 :     BitstreamPutBits(bs, GRPOFVOP_START_CODE, 32);
1429 :     BitstreamPutBits(bs, hours, 5);
1430 :     BitstreamPutBits(bs, minutes, 6);
1431 :     BitstreamPutBit(bs, 1);
1432 :     BitstreamPutBits(bs, seconds, 6);
1433 :     BitstreamPutBits(bs, is_closed_gov, 1);
1434 :     BitstreamPutBits(bs, 0, 1); /* broken_link */
1435 :     }
1436 :    
1437 :     /*
1438 :     * End of Sequence
1439 :     */
1440 :     void
1441 :     BitstreamWriteEndOfSequence(Bitstream * const bs)
1442 :     {
1443 :     BitstreamPadAlways(bs);
1444 :     BitstreamPutBits(bs, VISOBJSEQ_STOP_CODE, 32);
1445 :     }
1446 :    
1447 :     /*
1448 :     * Video Packet (resync marker)
1449 :     */
1450 :    
1451 :     void write_video_packet_header(Bitstream * const bs,
1452 :     const MBParam * pParam,
1453 :     const FRAMEINFO * const frame,
1454 :     int mbnum)
1455 :     {
1456 :     const int mbnum_bits = log2bin(pParam->mb_width * pParam->mb_height - 1);
1457 :     uint32_t nbitsresyncmarker;
1458 :     int addbits=0;
1459 :     if (frame->coding_type != I_VOP)
1460 :     addbits = frame->fcode -1;
1461 :     if (frame->coding_type == B_VOP)
1462 :     addbits = MAX(frame->fcode, frame->bcode)-1;
1463 :     BitstreamPadAlways(bs);
1464 :     nbitsresyncmarker = NUMBITS_VP_RESYNC_MARKER + addbits;
1465 :     BitstreamPutBits(bs, RESYNC_MARKER, nbitsresyncmarker);
1466 :     BitstreamPutBits(bs, mbnum, mbnum_bits);
1467 :     BitstreamPutBits(bs, frame->quant, 5);
1468 :     BitstreamPutBit(bs, 0); /* hec */
1469 :     }

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