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1 : edgomez 1.42 /*****************************************************************************
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 1.52 * $Id: bitstream.c,v 1.51 2005/05/17 21:03:32 Skal Exp $
24 : edgomez 1.42 *
25 :     ****************************************************************************/
26 : edgomez 1.38
27 :     #include <string.h>
28 :     #include <stdio.h>
29 : Isibaar 1.1
30 :     #include "bitstream.h"
31 :     #include "zigzag.h"
32 : Isibaar 1.2 #include "../quant/quant_matrix.h"
33 : edgomez 1.38 #include "mbcoding.h"
34 : Isibaar 1.1
35 : chenm001 1.6
36 : Skal 1.52 static const uint8_t log2_tab_16[16] = { 0, 1, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4 };
37 : Skal 1.51
38 :     static uint32_t __inline log2bin(uint32_t value)
39 : Isibaar 1.1 {
40 : Skal 1.51 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 1.1 }
55 :    
56 : edgomez 1.14 static const uint32_t intra_dc_threshold_table[] = {
57 :     32, /* never use */
58 : Isibaar 1.1 13,
59 :     15,
60 :     17,
61 :     19,
62 :     21,
63 :     23,
64 :     1,
65 :     };
66 :    
67 :    
68 : edgomez 1.14 void
69 :     bs_get_matrix(Bitstream * bs,
70 :     uint8_t * matrix)
71 :     {
72 :     int i = 0;
73 :     int last, value = 0;
74 :    
75 :     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 1.45 if (value != 0) return;
83 :    
84 :     i--;
85 : edgomez 1.14 while (i < 64) {
86 :     matrix[scan_tables[0][i++]] = last;
87 :     }
88 :     }
89 : Isibaar 1.2
90 : suxen_drol 1.21
91 :    
92 : edgomez 1.42 /*
93 :     * for PVOP addbits == fcode - 1
94 :     * for BVOP addbits == max(fcode,bcode) - 1
95 :     * returns mbpos
96 :     */
97 : suxen_drol 1.21 int
98 : edgomez 1.42 read_video_packet_header(Bitstream *bs,
99 :     DECODER * dec,
100 :     const int addbits,
101 :     int * quant,
102 : edgomez 1.38 int * fcode_forward,
103 :     int * fcode_backward,
104 :     int * intra_dc_threshold)
105 : suxen_drol 1.21 {
106 : edgomez 1.38 int startcode_bits = NUMBITS_VP_RESYNC_MARKER + addbits;
107 :     int mbnum_bits = log2bin(dec->mb_width * dec->mb_height - 1);
108 : suxen_drol 1.21 int mbnum;
109 : edgomez 1.38 int hec = 0;
110 : suxen_drol 1.21
111 :     BitstreamSkip(bs, BitstreamNumBitsToByteAlign(bs));
112 : edgomez 1.38 BitstreamSkip(bs, startcode_bits);
113 : suxen_drol 1.21
114 : edgomez 1.42 DPRINTF(XVID_DEBUG_STARTCODE, "<video_packet_header>\n");
115 : suxen_drol 1.22
116 : edgomez 1.38 if (dec->shape != VIDOBJLAY_SHAPE_RECTANGULAR)
117 :     {
118 :     hec = BitstreamGetBit(bs); /* header_extension_code */
119 : edgomez 1.42 if (hec && !(dec->sprite_enable == SPRITE_STATIC /* && current_coding_type = I_VOP */))
120 : edgomez 1.38 {
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 :    
132 :     mbnum = BitstreamGetBits(bs, mbnum_bits); /* macroblock_number */
133 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "mbnum %i\n", mbnum);
134 : suxen_drol 1.21
135 : edgomez 1.38 if (dec->shape != VIDOBJLAY_SHAPE_BINARY_ONLY)
136 :     {
137 : edgomez 1.42 *quant = BitstreamGetBits(bs, dec->quant_bits); /* quant_scale */
138 :     DPRINTF(XVID_DEBUG_HEADER, "quant %i\n", *quant);
139 : edgomez 1.38 }
140 : suxen_drol 1.21
141 : edgomez 1.38 if (dec->shape == VIDOBJLAY_SHAPE_RECTANGULAR)
142 :     hec = BitstreamGetBit(bs); /* header_extension_code */
143 : suxen_drol 1.21
144 :    
145 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "header_extension_code %i\n", hec);
146 : edgomez 1.38 if (hec)
147 :     {
148 :     int time_base;
149 :     int time_increment;
150 :     int coding_type;
151 :    
152 :     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 1.42 DPRINTF(XVID_DEBUG_HEADER,"time %i:%i\n", time_base, time_increment);
158 : edgomez 1.38
159 :     coding_type = BitstreamGetBits(bs, 2);
160 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER,"coding_type %i\n", coding_type);
161 :    
162 : edgomez 1.38 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 1.42 /* TODO: sprite trajectory */
177 : edgomez 1.38 }
178 : edgomez 1.42 if (dec->reduced_resolution_enable &&
179 : edgomez 1.38 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 1.42 DPRINTF(XVID_DEBUG_HEADER,"fcode_forward %i\n", *fcode_forward);
189 : edgomez 1.38 }
190 :    
191 :     if (coding_type == B_VOP && fcode_backward)
192 :     {
193 :     *fcode_backward = BitstreamGetBits(bs, 3);
194 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER,"fcode_backward %i\n", *fcode_backward);
195 : edgomez 1.38 }
196 :     }
197 :     }
198 :    
199 :     if (dec->newpred_enable)
200 :     {
201 :     int vop_id;
202 :     int vop_id_for_prediction;
203 : edgomez 1.42
204 : edgomez 1.38 vop_id = BitstreamGetBits(bs, MIN(dec->time_inc_bits + 3, 15));
205 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "vop_id %i\n", vop_id);
206 : edgomez 1.38 if (BitstreamGetBit(bs)) /* vop_id_for_prediction_indication */
207 :     {
208 :     vop_id_for_prediction = BitstreamGetBits(bs, MIN(dec->time_inc_bits + 3, 15));
209 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "vop_id_for_prediction %i\n", vop_id_for_prediction);
210 : edgomez 1.38 }
211 :     READ_MARKER();
212 :     }
213 : suxen_drol 1.21
214 :     return mbnum;
215 :     }
216 :    
217 :    
218 :    
219 : edgomez 1.38
220 :     /* vol estimation header */
221 :     static void
222 :     read_vol_complexity_estimation_header(Bitstream * bs, DECODER * dec)
223 :     {
224 :     ESTIMATION * e = &dec->estimation;
225 :    
226 :     e->method = BitstreamGetBits(bs, 2); /* estimation_method */
227 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER,"+ complexity_estimation_header; method=%i\n", e->method);
228 : edgomez 1.38
229 : edgomez 1.42 if (e->method == 0 || e->method == 1)
230 : edgomez 1.38 {
231 :     if (!BitstreamGetBit(bs)) /* shape_complexity_estimation_disable */
232 :     {
233 :     e->opaque = BitstreamGetBit(bs); /* opaque */
234 :     e->transparent = BitstreamGetBit(bs); /* transparent */
235 :     e->intra_cae = BitstreamGetBit(bs); /* intra_cae */
236 :     e->inter_cae = BitstreamGetBit(bs); /* inter_cae */
237 :     e->no_update = BitstreamGetBit(bs); /* no_update */
238 :     e->upsampling = BitstreamGetBit(bs); /* upsampling */
239 :     }
240 :    
241 :     if (!BitstreamGetBit(bs)) /* texture_complexity_estimation_set_1_disable */
242 :     {
243 :     e->intra_blocks = BitstreamGetBit(bs); /* intra_blocks */
244 :     e->inter_blocks = BitstreamGetBit(bs); /* inter_blocks */
245 :     e->inter4v_blocks = BitstreamGetBit(bs); /* inter4v_blocks */
246 :     e->not_coded_blocks = BitstreamGetBit(bs); /* not_coded_blocks */
247 :     }
248 :     }
249 :    
250 :     READ_MARKER();
251 :    
252 :     if (!BitstreamGetBit(bs)) /* texture_complexity_estimation_set_2_disable */
253 :     {
254 :     e->dct_coefs = BitstreamGetBit(bs); /* dct_coefs */
255 :     e->dct_lines = BitstreamGetBit(bs); /* dct_lines */
256 :     e->vlc_symbols = BitstreamGetBit(bs); /* vlc_symbols */
257 :     e->vlc_bits = BitstreamGetBit(bs); /* vlc_bits */
258 :     }
259 :    
260 :     if (!BitstreamGetBit(bs)) /* motion_compensation_complexity_disable */
261 :     {
262 :     e->apm = BitstreamGetBit(bs); /* apm */
263 :     e->npm = BitstreamGetBit(bs); /* npm */
264 :     e->interpolate_mc_q = BitstreamGetBit(bs); /* interpolate_mc_q */
265 :     e->forw_back_mc_q = BitstreamGetBit(bs); /* forw_back_mc_q */
266 :     e->halfpel2 = BitstreamGetBit(bs); /* halfpel2 */
267 :     e->halfpel4 = BitstreamGetBit(bs); /* halfpel4 */
268 :     }
269 :    
270 :     READ_MARKER();
271 :    
272 :     if (e->method == 1)
273 :     {
274 :     if (!BitstreamGetBit(bs)) /* version2_complexity_estimation_disable */
275 :     {
276 :     e->sadct = BitstreamGetBit(bs); /* sadct */
277 :     e->quarterpel = BitstreamGetBit(bs); /* quarterpel */
278 :     }
279 :     }
280 :     }
281 :    
282 :    
283 :     /* vop estimation header */
284 :     static void
285 :     read_vop_complexity_estimation_header(Bitstream * bs, DECODER * dec, int coding_type)
286 :     {
287 :     ESTIMATION * e = &dec->estimation;
288 :    
289 :     if (e->method == 0 || e->method == 1)
290 :     {
291 :     if (coding_type == I_VOP) {
292 :     if (e->opaque) BitstreamSkip(bs, 8); /* dcecs_opaque */
293 :     if (e->transparent) BitstreamSkip(bs, 8); /* */
294 :     if (e->intra_cae) BitstreamSkip(bs, 8); /* */
295 :     if (e->inter_cae) BitstreamSkip(bs, 8); /* */
296 :     if (e->no_update) BitstreamSkip(bs, 8); /* */
297 :     if (e->upsampling) BitstreamSkip(bs, 8); /* */
298 :     if (e->intra_blocks) BitstreamSkip(bs, 8); /* */
299 :     if (e->not_coded_blocks) BitstreamSkip(bs, 8); /* */
300 :     if (e->dct_coefs) BitstreamSkip(bs, 8); /* */
301 :     if (e->dct_lines) BitstreamSkip(bs, 8); /* */
302 :     if (e->vlc_symbols) BitstreamSkip(bs, 8); /* */
303 :     if (e->vlc_bits) BitstreamSkip(bs, 8); /* */
304 :     if (e->sadct) BitstreamSkip(bs, 8); /* */
305 :     }
306 : edgomez 1.42
307 : edgomez 1.38 if (coding_type == P_VOP) {
308 :     if (e->opaque) BitstreamSkip(bs, 8); /* */
309 :     if (e->transparent) BitstreamSkip(bs, 8); /* */
310 :     if (e->intra_cae) BitstreamSkip(bs, 8); /* */
311 :     if (e->inter_cae) BitstreamSkip(bs, 8); /* */
312 :     if (e->no_update) BitstreamSkip(bs, 8); /* */
313 :     if (e->upsampling) BitstreamSkip(bs, 8); /* */
314 :     if (e->intra_blocks) BitstreamSkip(bs, 8); /* */
315 :     if (e->not_coded_blocks) BitstreamSkip(bs, 8); /* */
316 :     if (e->dct_coefs) BitstreamSkip(bs, 8); /* */
317 :     if (e->dct_lines) BitstreamSkip(bs, 8); /* */
318 :     if (e->vlc_symbols) BitstreamSkip(bs, 8); /* */
319 :     if (e->vlc_bits) BitstreamSkip(bs, 8); /* */
320 :     if (e->inter_blocks) BitstreamSkip(bs, 8); /* */
321 :     if (e->inter4v_blocks) BitstreamSkip(bs, 8); /* */
322 :     if (e->apm) BitstreamSkip(bs, 8); /* */
323 :     if (e->npm) BitstreamSkip(bs, 8); /* */
324 :     if (e->forw_back_mc_q) BitstreamSkip(bs, 8); /* */
325 :     if (e->halfpel2) BitstreamSkip(bs, 8); /* */
326 :     if (e->halfpel4) BitstreamSkip(bs, 8); /* */
327 :     if (e->sadct) BitstreamSkip(bs, 8); /* */
328 :     if (e->quarterpel) BitstreamSkip(bs, 8); /* */
329 :     }
330 :     if (coding_type == B_VOP) {
331 :     if (e->opaque) BitstreamSkip(bs, 8); /* */
332 :     if (e->transparent) BitstreamSkip(bs, 8); /* */
333 :     if (e->intra_cae) BitstreamSkip(bs, 8); /* */
334 :     if (e->inter_cae) BitstreamSkip(bs, 8); /* */
335 :     if (e->no_update) BitstreamSkip(bs, 8); /* */
336 :     if (e->upsampling) BitstreamSkip(bs, 8); /* */
337 :     if (e->intra_blocks) BitstreamSkip(bs, 8); /* */
338 :     if (e->not_coded_blocks) BitstreamSkip(bs, 8); /* */
339 :     if (e->dct_coefs) BitstreamSkip(bs, 8); /* */
340 :     if (e->dct_lines) BitstreamSkip(bs, 8); /* */
341 :     if (e->vlc_symbols) BitstreamSkip(bs, 8); /* */
342 :     if (e->vlc_bits) BitstreamSkip(bs, 8); /* */
343 :     if (e->inter_blocks) BitstreamSkip(bs, 8); /* */
344 :     if (e->inter4v_blocks) BitstreamSkip(bs, 8); /* */
345 :     if (e->apm) BitstreamSkip(bs, 8); /* */
346 :     if (e->npm) BitstreamSkip(bs, 8); /* */
347 :     if (e->forw_back_mc_q) BitstreamSkip(bs, 8); /* */
348 :     if (e->halfpel2) BitstreamSkip(bs, 8); /* */
349 :     if (e->halfpel4) BitstreamSkip(bs, 8); /* */
350 :     if (e->interpolate_mc_q) BitstreamSkip(bs, 8); /* */
351 :     if (e->sadct) BitstreamSkip(bs, 8); /* */
352 :     if (e->quarterpel) BitstreamSkip(bs, 8); /* */
353 :     }
354 :    
355 :     if (coding_type == S_VOP && dec->sprite_enable == SPRITE_STATIC) {
356 :     if (e->intra_blocks) BitstreamSkip(bs, 8); /* */
357 :     if (e->not_coded_blocks) BitstreamSkip(bs, 8); /* */
358 :     if (e->dct_coefs) BitstreamSkip(bs, 8); /* */
359 :     if (e->dct_lines) BitstreamSkip(bs, 8); /* */
360 :     if (e->vlc_symbols) BitstreamSkip(bs, 8); /* */
361 :     if (e->vlc_bits) BitstreamSkip(bs, 8); /* */
362 :     if (e->inter_blocks) BitstreamSkip(bs, 8); /* */
363 :     if (e->inter4v_blocks) BitstreamSkip(bs, 8); /* */
364 :     if (e->apm) BitstreamSkip(bs, 8); /* */
365 :     if (e->npm) BitstreamSkip(bs, 8); /* */
366 :     if (e->forw_back_mc_q) BitstreamSkip(bs, 8); /* */
367 :     if (e->halfpel2) BitstreamSkip(bs, 8); /* */
368 :     if (e->halfpel4) BitstreamSkip(bs, 8); /* */
369 :     if (e->interpolate_mc_q) BitstreamSkip(bs, 8); /* */
370 :     }
371 :     }
372 :     }
373 :    
374 :    
375 :    
376 :    
377 :    
378 : Isibaar 1.1 /*
379 :     decode headers
380 :     returns coding_type, or -1 if error
381 :     */
382 :    
383 : suxen_drol 1.22 #define VIDOBJ_START_CODE_MASK 0x0000001f
384 :     #define VIDOBJLAY_START_CODE_MASK 0x0000000f
385 :    
386 : edgomez 1.14 int
387 :     BitstreamReadHeaders(Bitstream * bs,
388 :     DECODER * dec,
389 :     uint32_t * rounding,
390 :     uint32_t * quant,
391 :     uint32_t * fcode_forward,
392 :     uint32_t * fcode_backward,
393 : edgomez 1.38 uint32_t * intra_dc_threshold,
394 :     WARPPOINTS *gmc_warp)
395 : Isibaar 1.1 {
396 :     uint32_t vol_ver_id;
397 :     uint32_t coding_type;
398 :     uint32_t start_code;
399 : edgomez 1.14 uint32_t time_incr = 0;
400 : edgomez 1.39 int32_t time_increment = 0;
401 : edgomez 1.38 int resize = 0;
402 : chenm001 1.9
403 : syskin 1.47 while ((BitstreamPos(bs) >> 3) + 4 <= bs->length) {
404 : edgomez 1.38
405 : Isibaar 1.1 BitstreamByteAlign(bs);
406 :     start_code = BitstreamShowBits(bs, 32);
407 :    
408 : edgomez 1.14 if (start_code == VISOBJSEQ_START_CODE) {
409 : suxen_drol 1.22
410 :     int profile;
411 :    
412 : edgomez 1.42 DPRINTF(XVID_DEBUG_STARTCODE, "<visual_object_sequence>\n");
413 : suxen_drol 1.22
414 : edgomez 1.42 BitstreamSkip(bs, 32); /* visual_object_sequence_start_code */
415 :     profile = BitstreamGetBits(bs, 8); /* profile_and_level_indication */
416 : suxen_drol 1.22
417 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "profile_and_level_indication %i\n", profile);
418 : suxen_drol 1.22
419 : edgomez 1.14 } else if (start_code == VISOBJSEQ_STOP_CODE) {
420 : suxen_drol 1.22
421 : edgomez 1.42 BitstreamSkip(bs, 32); /* visual_object_sequence_stop_code */
422 : suxen_drol 1.22
423 : edgomez 1.42 DPRINTF(XVID_DEBUG_STARTCODE, "</visual_object_sequence>\n");
424 : suxen_drol 1.22
425 : edgomez 1.14 } else if (start_code == VISOBJ_START_CODE) {
426 : edgomez 1.38 int visobj_ver_id;
427 : suxen_drol 1.22
428 : edgomez 1.42 DPRINTF(XVID_DEBUG_STARTCODE, "<visual_object>\n");
429 : suxen_drol 1.22
430 : edgomez 1.42 BitstreamSkip(bs, 32); /* visual_object_start_code */
431 :     if (BitstreamGetBit(bs)) /* is_visual_object_identified */
432 : Isibaar 1.1 {
433 : edgomez 1.42 visobj_ver_id = BitstreamGetBits(bs, 4); /* visual_object_ver_id */
434 :     DPRINTF(XVID_DEBUG_HEADER,"visobj_ver_id %i\n", visobj_ver_id);
435 :     BitstreamSkip(bs, 3); /* visual_object_priority */
436 : edgomez 1.14 } else {
437 : edgomez 1.38 visobj_ver_id = 1;
438 : Isibaar 1.1 }
439 :    
440 : edgomez 1.42 if (BitstreamShowBits(bs, 4) != VISOBJ_TYPE_VIDEO) /* visual_object_type */
441 : Isibaar 1.1 {
442 : edgomez 1.42 DPRINTF(XVID_DEBUG_ERROR, "visual_object_type != video\n");
443 : Isibaar 1.1 return -1;
444 :     }
445 :     BitstreamSkip(bs, 4);
446 :    
447 : edgomez 1.42 /* video_signal_type */
448 : Isibaar 1.1
449 : edgomez 1.42 if (BitstreamGetBit(bs)) /* video_signal_type */
450 : Isibaar 1.1 {
451 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER,"+ video_signal_type\n");
452 :     BitstreamSkip(bs, 3); /* video_format */
453 :     BitstreamSkip(bs, 1); /* video_range */
454 :     if (BitstreamGetBit(bs)) /* color_description */
455 : Isibaar 1.1 {
456 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER,"+ color_description");
457 :     BitstreamSkip(bs, 8); /* color_primaries */
458 :     BitstreamSkip(bs, 8); /* transfer_characteristics */
459 :     BitstreamSkip(bs, 8); /* matrix_coefficients */
460 : Isibaar 1.1 }
461 :     }
462 : suxen_drol 1.22 } else if ((start_code & ~VIDOBJ_START_CODE_MASK) == VIDOBJ_START_CODE) {
463 :    
464 : edgomez 1.42 DPRINTF(XVID_DEBUG_STARTCODE, "<video_object>\n");
465 :     DPRINTF(XVID_DEBUG_HEADER, "vo id %i\n", start_code & VIDOBJ_START_CODE_MASK);
466 : suxen_drol 1.22
467 : edgomez 1.42 BitstreamSkip(bs, 32); /* video_object_start_code */
468 : suxen_drol 1.22
469 :     } else if ((start_code & ~VIDOBJLAY_START_CODE_MASK) == VIDOBJLAY_START_CODE) {
470 :    
471 : edgomez 1.42 DPRINTF(XVID_DEBUG_STARTCODE, "<video_object_layer>\n");
472 :     DPRINTF(XVID_DEBUG_HEADER, "vol id %i\n", start_code & VIDOBJLAY_START_CODE_MASK);
473 : Isibaar 1.1
474 : edgomez 1.42 BitstreamSkip(bs, 32); /* video_object_layer_start_code */
475 :     BitstreamSkip(bs, 1); /* random_accessible_vol */
476 : Isibaar 1.1
477 : edgomez 1.42 BitstreamSkip(bs, 8); /* video_object_type_indication */
478 : Isibaar 1.1
479 : edgomez 1.42 if (BitstreamGetBit(bs)) /* is_object_layer_identifier */
480 : Isibaar 1.1 {
481 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "+ is_object_layer_identifier\n");
482 :     vol_ver_id = BitstreamGetBits(bs, 4); /* video_object_layer_verid */
483 :     DPRINTF(XVID_DEBUG_HEADER,"ver_id %i\n", vol_ver_id);
484 :     BitstreamSkip(bs, 3); /* video_object_layer_priority */
485 : edgomez 1.14 } else {
486 : Isibaar 1.1 vol_ver_id = 1;
487 :     }
488 :    
489 : edgomez 1.38 dec->aspect_ratio = BitstreamGetBits(bs, 4);
490 :    
491 : edgomez 1.42 if (dec->aspect_ratio == VIDOBJLAY_AR_EXTPAR) /* aspect_ratio_info */
492 : Isibaar 1.1 {
493 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "+ aspect_ratio_info\n");
494 :     dec->par_width = BitstreamGetBits(bs, 8); /* par_width */
495 :     dec->par_height = BitstreamGetBits(bs, 8); /* par_height */
496 : Isibaar 1.1 }
497 :    
498 : edgomez 1.42 if (BitstreamGetBit(bs)) /* vol_control_parameters */
499 : Isibaar 1.1 {
500 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "+ vol_control_parameters\n");
501 :     BitstreamSkip(bs, 2); /* chroma_format */
502 :     dec->low_delay = BitstreamGetBit(bs); /* low_delay */
503 :     DPRINTF(XVID_DEBUG_HEADER, "low_delay %i\n", dec->low_delay);
504 :     if (BitstreamGetBit(bs)) /* vbv_parameters */
505 : Isibaar 1.1 {
506 : edgomez 1.38 unsigned int bitrate;
507 :     unsigned int buffer_size;
508 :     unsigned int occupancy;
509 :    
510 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER,"+ vbv_parameters\n");
511 : edgomez 1.38
512 : edgomez 1.42 bitrate = BitstreamGetBits(bs,15) << 15; /* first_half_bit_rate */
513 : Isibaar 1.1 READ_MARKER();
514 : edgomez 1.42 bitrate |= BitstreamGetBits(bs,15); /* latter_half_bit_rate */
515 : Isibaar 1.1 READ_MARKER();
516 : edgomez 1.42
517 :     buffer_size = BitstreamGetBits(bs, 15) << 3; /* first_half_vbv_buffer_size */
518 : Isibaar 1.1 READ_MARKER();
519 : edgomez 1.42 buffer_size |= BitstreamGetBits(bs, 3); /* latter_half_vbv_buffer_size */
520 : edgomez 1.38
521 : edgomez 1.42 occupancy = BitstreamGetBits(bs, 11) << 15; /* first_half_vbv_occupancy */
522 : Isibaar 1.1 READ_MARKER();
523 : edgomez 1.42 occupancy |= BitstreamGetBits(bs, 15); /* latter_half_vbv_occupancy */
524 : Isibaar 1.1 READ_MARKER();
525 : edgomez 1.14
526 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER,"bitrate %d (unit=400 bps)\n", bitrate);
527 :     DPRINTF(XVID_DEBUG_HEADER,"buffer_size %d (unit=16384 bits)\n", buffer_size);
528 :     DPRINTF(XVID_DEBUG_HEADER,"occupancy %d (unit=64 bits)\n", occupancy);
529 : Isibaar 1.1 }
530 : edgomez 1.38 }else{
531 :     dec->low_delay = dec->low_delay_default;
532 : Isibaar 1.1 }
533 :    
534 : edgomez 1.42 dec->shape = BitstreamGetBits(bs, 2); /* video_object_layer_shape */
535 : edgomez 1.38
536 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "shape %i\n", dec->shape);
537 : edgomez 1.38 if (dec->shape != VIDOBJLAY_SHAPE_RECTANGULAR)
538 :     {
539 : edgomez 1.42 DPRINTF(XVID_DEBUG_ERROR,"non-rectangular shapes are not supported\n");
540 : edgomez 1.38 }
541 : edgomez 1.14
542 :     if (dec->shape == VIDOBJLAY_SHAPE_GRAYSCALE && vol_ver_id != 1) {
543 : edgomez 1.42 BitstreamSkip(bs, 4); /* video_object_layer_shape_extension */
544 : Isibaar 1.1 }
545 :    
546 :     READ_MARKER();
547 :    
548 : edgomez 1.42 /********************** for decode B-frame time ***********************/
549 :     dec->time_inc_resolution = BitstreamGetBits(bs, 16); /* vop_time_increment_resolution */
550 :     DPRINTF(XVID_DEBUG_HEADER,"vop_time_increment_resolution %i\n", dec->time_inc_resolution);
551 : suxen_drol 1.22
552 : edgomez 1.38 if (dec->time_inc_resolution > 0) {
553 : edgomez 1.44 dec->time_inc_bits = MAX(log2bin(dec->time_inc_resolution-1), 1);
554 : edgomez 1.14 } else {
555 : edgomez 1.42 /* for "old" xvid compatibility, set time_inc_bits = 1 */
556 : Isibaar 1.1 dec->time_inc_bits = 1;
557 :     }
558 :    
559 :     READ_MARKER();
560 :    
561 : edgomez 1.42 if (BitstreamGetBit(bs)) /* fixed_vop_rate */
562 : Isibaar 1.1 {
563 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "+ fixed_vop_rate\n");
564 :     BitstreamSkip(bs, dec->time_inc_bits); /* fixed_vop_time_increment */
565 : Isibaar 1.1 }
566 :    
567 : edgomez 1.14 if (dec->shape != VIDOBJLAY_SHAPE_BINARY_ONLY) {
568 : Isibaar 1.1
569 : edgomez 1.14 if (dec->shape == VIDOBJLAY_SHAPE_RECTANGULAR) {
570 : Isibaar 1.1 uint32_t width, height;
571 :    
572 :     READ_MARKER();
573 : edgomez 1.42 width = BitstreamGetBits(bs, 13); /* video_object_layer_width */
574 : Isibaar 1.1 READ_MARKER();
575 : edgomez 1.42 height = BitstreamGetBits(bs, 13); /* video_object_layer_height */
576 : Isibaar 1.1 READ_MARKER();
577 :    
578 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "width %i\n", width);
579 :     DPRINTF(XVID_DEBUG_HEADER, "height %i\n", height);
580 : chenm001 1.23
581 : edgomez 1.38 if (dec->width != width || dec->height != height)
582 :     {
583 :     if (dec->fixed_dimensions)
584 :     {
585 : edgomez 1.42 DPRINTF(XVID_DEBUG_ERROR, "decoder width/height does not match bitstream\n");
586 : edgomez 1.38 return -1;
587 :     }
588 :     resize = 1;
589 : chenm001 1.23 dec->width = width;
590 :     dec->height = height;
591 : Isibaar 1.1 }
592 :     }
593 : h 1.4
594 : suxen_drol 1.22 dec->interlacing = BitstreamGetBit(bs);
595 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "interlacing %i\n", dec->interlacing);
596 : Isibaar 1.1
597 : edgomez 1.42 if (!BitstreamGetBit(bs)) /* obmc_disable */
598 : Isibaar 1.1 {
599 : edgomez 1.42 DPRINTF(XVID_DEBUG_ERROR, "obmc_disabled==false not supported\n");
600 :     /* TODO */
601 :     /* fucking divx4.02 has this enabled */
602 : Isibaar 1.1 }
603 :    
604 : edgomez 1.42 dec->sprite_enable = BitstreamGetBits(bs, (vol_ver_id == 1 ? 1 : 2)); /* sprite_enable */
605 : edgomez 1.38
606 :     if (dec->sprite_enable == SPRITE_STATIC || dec->sprite_enable == SPRITE_GMC)
607 : Isibaar 1.1 {
608 : edgomez 1.38 int low_latency_sprite_enable;
609 :    
610 :     if (dec->sprite_enable != SPRITE_GMC)
611 :     {
612 :     int sprite_width;
613 :     int sprite_height;
614 :     int sprite_left_coord;
615 :     int sprite_top_coord;
616 : edgomez 1.42 sprite_width = BitstreamGetBits(bs, 13); /* sprite_width */
617 : edgomez 1.38 READ_MARKER();
618 : edgomez 1.42 sprite_height = BitstreamGetBits(bs, 13); /* sprite_height */
619 : edgomez 1.38 READ_MARKER();
620 : edgomez 1.42 sprite_left_coord = BitstreamGetBits(bs, 13); /* sprite_left_coordinate */
621 : edgomez 1.38 READ_MARKER();
622 : edgomez 1.42 sprite_top_coord = BitstreamGetBits(bs, 13); /* sprite_top_coordinate */
623 : edgomez 1.38 READ_MARKER();
624 :     }
625 : edgomez 1.42 dec->sprite_warping_points = BitstreamGetBits(bs, 6); /* no_of_sprite_warping_points */
626 :     dec->sprite_warping_accuracy = BitstreamGetBits(bs, 2); /* sprite_warping_accuracy */
627 :     dec->sprite_brightness_change = BitstreamGetBits(bs, 1); /* brightness_change */
628 : edgomez 1.38 if (dec->sprite_enable != SPRITE_GMC)
629 :     {
630 : edgomez 1.42 low_latency_sprite_enable = BitstreamGetBits(bs, 1); /* low_latency_sprite_enable */
631 : edgomez 1.38 }
632 : Isibaar 1.1 }
633 : edgomez 1.14
634 :     if (vol_ver_id != 1 &&
635 :     dec->shape != VIDOBJLAY_SHAPE_RECTANGULAR) {
636 : edgomez 1.42 BitstreamSkip(bs, 1); /* sadct_disable */
637 : Isibaar 1.1 }
638 :    
639 : edgomez 1.42 if (BitstreamGetBit(bs)) /* not_8_bit */
640 : Isibaar 1.1 {
641 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "not_8_bit==true (ignored)\n");
642 :     dec->quant_bits = BitstreamGetBits(bs, 4); /* quant_precision */
643 :     BitstreamSkip(bs, 4); /* bits_per_pixel */
644 : edgomez 1.14 } else {
645 : Isibaar 1.1 dec->quant_bits = 5;
646 :     }
647 :    
648 : edgomez 1.14 if (dec->shape == VIDOBJLAY_SHAPE_GRAYSCALE) {
649 : edgomez 1.42 BitstreamSkip(bs, 1); /* no_gray_quant_update */
650 :     BitstreamSkip(bs, 1); /* composition_method */
651 :     BitstreamSkip(bs, 1); /* linear_composition */
652 : Isibaar 1.1 }
653 :    
654 : edgomez 1.42 dec->quant_type = BitstreamGetBit(bs); /* quant_type */
655 :     DPRINTF(XVID_DEBUG_HEADER, "quant_type %i\n", dec->quant_type);
656 : Isibaar 1.1
657 : edgomez 1.14 if (dec->quant_type) {
658 : edgomez 1.42 if (BitstreamGetBit(bs)) /* load_intra_quant_mat */
659 : Isibaar 1.1 {
660 : Isibaar 1.3 uint8_t matrix[64];
661 : edgomez 1.14
662 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "load_intra_quant_mat\n");
663 : suxen_drol 1.22
664 : Isibaar 1.2 bs_get_matrix(bs, matrix);
665 : edgomez 1.42 set_intra_matrix(dec->mpeg_quant_matrices, matrix);
666 : edgomez 1.14 } else
667 : edgomez 1.42 set_intra_matrix(dec->mpeg_quant_matrices, get_default_intra_matrix());
668 : Isibaar 1.2
669 : edgomez 1.42 if (BitstreamGetBit(bs)) /* load_inter_quant_mat */
670 : Isibaar 1.1 {
671 : edgomez 1.14 uint8_t matrix[64];
672 : edgomez 1.42
673 :     DPRINTF(XVID_DEBUG_HEADER, "load_inter_quant_mat\n");
674 : edgomez 1.14
675 : Isibaar 1.2 bs_get_matrix(bs, matrix);
676 : edgomez 1.42 set_inter_matrix(dec->mpeg_quant_matrices, matrix);
677 : edgomez 1.14 } else
678 : edgomez 1.42 set_inter_matrix(dec->mpeg_quant_matrices, get_default_inter_matrix());
679 : Isibaar 1.1
680 : edgomez 1.14 if (dec->shape == VIDOBJLAY_SHAPE_GRAYSCALE) {
681 : edgomez 1.42 DPRINTF(XVID_DEBUG_ERROR, "greyscale matrix not supported\n");
682 : Isibaar 1.1 return -1;
683 :     }
684 : Isibaar 1.2
685 : Isibaar 1.1 }
686 :    
687 : edgomez 1.14
688 :     if (vol_ver_id != 1) {
689 : edgomez 1.42 dec->quarterpel = BitstreamGetBit(bs); /* quarter_sample */
690 :     DPRINTF(XVID_DEBUG_HEADER,"quarterpel %i\n", dec->quarterpel);
691 : Isibaar 1.26 }
692 :     else
693 : Isibaar 1.1 dec->quarterpel = 0;
694 : edgomez 1.42
695 : Isibaar 1.1
696 : edgomez 1.38 dec->complexity_estimation_disable = BitstreamGetBit(bs); /* complexity estimation disable */
697 :     if (!dec->complexity_estimation_disable)
698 : Isibaar 1.1 {
699 : edgomez 1.38 read_vol_complexity_estimation_header(bs, dec);
700 : Isibaar 1.1 }
701 :    
702 : edgomez 1.42 BitstreamSkip(bs, 1); /* resync_marker_disable */
703 : Isibaar 1.1
704 : edgomez 1.42 if (BitstreamGetBit(bs)) /* data_partitioned */
705 : Isibaar 1.1 {
706 : edgomez 1.42 DPRINTF(XVID_DEBUG_ERROR, "data_partitioned not supported\n");
707 :     BitstreamSkip(bs, 1); /* reversible_vlc */
708 : Isibaar 1.1 }
709 :    
710 : edgomez 1.14 if (vol_ver_id != 1) {
711 : edgomez 1.38 dec->newpred_enable = BitstreamGetBit(bs);
712 : edgomez 1.42 if (dec->newpred_enable) /* newpred_enable */
713 : Isibaar 1.1 {
714 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "+ newpred_enable\n");
715 :     BitstreamSkip(bs, 2); /* requested_upstream_message_type */
716 :     BitstreamSkip(bs, 1); /* newpred_segment_type */
717 : Isibaar 1.1 }
718 : edgomez 1.38 dec->reduced_resolution_enable = BitstreamGetBit(bs); /* reduced_resolution_vop_enable */
719 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "reduced_resolution_enable %i\n", dec->reduced_resolution_enable);
720 : edgomez 1.38 }
721 :     else
722 :     {
723 :     dec->newpred_enable = 0;
724 :     dec->reduced_resolution_enable = 0;
725 : Isibaar 1.1 }
726 : edgomez 1.14
727 : edgomez 1.38 dec->scalability = BitstreamGetBit(bs); /* scalability */
728 : edgomez 1.42 if (dec->scalability)
729 : Isibaar 1.1 {
730 : edgomez 1.42 DPRINTF(XVID_DEBUG_ERROR, "scalability not supported\n");
731 : edgomez 1.38 BitstreamSkip(bs, 1); /* hierarchy_type */
732 :     BitstreamSkip(bs, 4); /* ref_layer_id */
733 :     BitstreamSkip(bs, 1); /* ref_layer_sampling_direc */
734 :     BitstreamSkip(bs, 5); /* hor_sampling_factor_n */
735 :     BitstreamSkip(bs, 5); /* hor_sampling_factor_m */
736 :     BitstreamSkip(bs, 5); /* vert_sampling_factor_n */
737 :     BitstreamSkip(bs, 5); /* vert_sampling_factor_m */
738 :     BitstreamSkip(bs, 1); /* enhancement_type */
739 :     if(dec->shape == VIDOBJLAY_SHAPE_BINARY /* && hierarchy_type==0 */) {
740 :     BitstreamSkip(bs, 1); /* use_ref_shape */
741 :     BitstreamSkip(bs, 1); /* use_ref_texture */
742 :     BitstreamSkip(bs, 5); /* shape_hor_sampling_factor_n */
743 :     BitstreamSkip(bs, 5); /* shape_hor_sampling_factor_m */
744 :     BitstreamSkip(bs, 5); /* shape_vert_sampling_factor_n */
745 :     BitstreamSkip(bs, 5); /* shape_vert_sampling_factor_m */
746 :     }
747 : Isibaar 1.1 return -1;
748 :     }
749 : edgomez 1.42 } else /* dec->shape == BINARY_ONLY */
750 : Isibaar 1.1 {
751 : edgomez 1.14 if (vol_ver_id != 1) {
752 : edgomez 1.38 dec->scalability = BitstreamGetBit(bs); /* scalability */
753 : edgomez 1.42 if (dec->scalability)
754 : Isibaar 1.1 {
755 : edgomez 1.42 DPRINTF(XVID_DEBUG_ERROR, "scalability not supported\n");
756 : edgomez 1.38 BitstreamSkip(bs, 4); /* ref_layer_id */
757 :     BitstreamSkip(bs, 5); /* hor_sampling_factor_n */
758 :     BitstreamSkip(bs, 5); /* hor_sampling_factor_m */
759 :     BitstreamSkip(bs, 5); /* vert_sampling_factor_n */
760 :     BitstreamSkip(bs, 5); /* vert_sampling_factor_m */
761 : Isibaar 1.1 return -1;
762 :     }
763 :     }
764 : edgomez 1.42 BitstreamSkip(bs, 1); /* resync_marker_disable */
765 : Isibaar 1.1
766 :     }
767 :    
768 : edgomez 1.38 return (resize ? -3 : -2 ); /* VOL */
769 :    
770 : edgomez 1.14 } else if (start_code == GRPOFVOP_START_CODE) {
771 : suxen_drol 1.22
772 : edgomez 1.42 DPRINTF(XVID_DEBUG_STARTCODE, "<group_of_vop>\n");
773 : suxen_drol 1.22
774 : Isibaar 1.1 BitstreamSkip(bs, 32);
775 :     {
776 :     int hours, minutes, seconds;
777 : edgomez 1.14
778 : Isibaar 1.1 hours = BitstreamGetBits(bs, 5);
779 :     minutes = BitstreamGetBits(bs, 6);
780 :     READ_MARKER();
781 :     seconds = BitstreamGetBits(bs, 6);
782 : edgomez 1.42
783 :     DPRINTF(XVID_DEBUG_HEADER, "time %ih%im%is\n", hours,minutes,seconds);
784 : Isibaar 1.1 }
785 : edgomez 1.42 BitstreamSkip(bs, 1); /* closed_gov */
786 :     BitstreamSkip(bs, 1); /* broken_link */
787 : suxen_drol 1.22
788 : edgomez 1.14 } else if (start_code == VOP_START_CODE) {
789 : suxen_drol 1.22
790 : edgomez 1.42 DPRINTF(XVID_DEBUG_STARTCODE, "<vop>\n");
791 : suxen_drol 1.22
792 : edgomez 1.42 BitstreamSkip(bs, 32); /* vop_start_code */
793 : Isibaar 1.1
794 : edgomez 1.42 coding_type = BitstreamGetBits(bs, 2); /* vop_coding_type */
795 :     DPRINTF(XVID_DEBUG_HEADER, "coding_type %i\n", coding_type);
796 : Isibaar 1.1
797 : edgomez 1.42 /*********************** for decode B-frame time ***********************/
798 :     while (BitstreamGetBit(bs) != 0) /* time_base */
799 : chenm001 1.9 time_incr++;
800 : edgomez 1.14
801 : Isibaar 1.1 READ_MARKER();
802 : edgomez 1.14
803 :     if (dec->time_inc_bits) {
804 : edgomez 1.42 time_increment = (BitstreamGetBits(bs, dec->time_inc_bits)); /* vop_time_increment */
805 : chenm001 1.9 }
806 : suxen_drol 1.19
807 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "time_base %i\n", time_incr);
808 :     DPRINTF(XVID_DEBUG_HEADER, "time_increment %i\n", time_increment);
809 : suxen_drol 1.22
810 : edgomez 1.42 DPRINTF(XVID_DEBUG_TIMECODE, "%c %i:%i\n",
811 : edgomez 1.38 coding_type == I_VOP ? 'I' : coding_type == P_VOP ? 'P' : coding_type == B_VOP ? 'B' : 'S',
812 : suxen_drol 1.19 time_incr, time_increment);
813 :    
814 : edgomez 1.14 if (coding_type != B_VOP) {
815 :     dec->last_time_base = dec->time_base;
816 : chenm001 1.9 dec->time_base += time_incr;
817 : edgomez 1.44 dec->time = dec->time_base*dec->time_inc_resolution + time_increment;
818 :     dec->time_pp = (int32_t)(dec->time - dec->last_non_b_time);
819 : edgomez 1.14 dec->last_non_b_time = dec->time;
820 :     } else {
821 : edgomez 1.44 dec->time = (dec->last_time_base + time_incr)*dec->time_inc_resolution + time_increment;
822 :     dec->time_bp = dec->time_pp - (int32_t)(dec->last_non_b_time - dec->time);
823 : Isibaar 1.1 }
824 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER,"time_pp=%i\n", dec->time_pp);
825 :     DPRINTF(XVID_DEBUG_HEADER,"time_bp=%i\n", dec->time_bp);
826 : Isibaar 1.1
827 :     READ_MARKER();
828 :    
829 : edgomez 1.42 if (!BitstreamGetBit(bs)) /* vop_coded */
830 : Isibaar 1.1 {
831 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "vop_coded==false\n");
832 : Isibaar 1.1 return N_VOP;
833 :     }
834 :    
835 : edgomez 1.38 if (dec->newpred_enable)
836 :     {
837 :     int vop_id;
838 :     int vop_id_for_prediction;
839 : edgomez 1.42
840 : edgomez 1.38 vop_id = BitstreamGetBits(bs, MIN(dec->time_inc_bits + 3, 15));
841 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "vop_id %i\n", vop_id);
842 : edgomez 1.38 if (BitstreamGetBit(bs)) /* vop_id_for_prediction_indication */
843 :     {
844 :     vop_id_for_prediction = BitstreamGetBits(bs, MIN(dec->time_inc_bits + 3, 15));
845 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "vop_id_for_prediction %i\n", vop_id_for_prediction);
846 : edgomez 1.38 }
847 :     READ_MARKER();
848 :     }
849 :    
850 : Isibaar 1.1
851 : edgomez 1.42
852 :     /* fix a little bug by MinChen <chenm002@163.com> */
853 : edgomez 1.14 if ((dec->shape != VIDOBJLAY_SHAPE_BINARY_ONLY) &&
854 : edgomez 1.38 ( (coding_type == P_VOP) || (coding_type == S_VOP && dec->sprite_enable == SPRITE_GMC) ) ) {
855 : edgomez 1.42 *rounding = BitstreamGetBit(bs); /* rounding_type */
856 :     DPRINTF(XVID_DEBUG_HEADER, "rounding %i\n", *rounding);
857 : Isibaar 1.1 }
858 :    
859 : edgomez 1.38 if (dec->reduced_resolution_enable &&
860 :     dec->shape == VIDOBJLAY_SHAPE_RECTANGULAR &&
861 :     (coding_type == P_VOP || coding_type == I_VOP)) {
862 :    
863 : syskin 1.48 if (BitstreamGetBit(bs));
864 :     DPRINTF(XVID_DEBUG_ERROR, "RRV not supported (anymore)\n");
865 : edgomez 1.38 }
866 : Isibaar 1.1
867 : edgomez 1.14 if (dec->shape != VIDOBJLAY_SHAPE_RECTANGULAR) {
868 : edgomez 1.38 if(!(dec->sprite_enable == SPRITE_STATIC && coding_type == I_VOP)) {
869 : edgomez 1.14
870 : edgomez 1.38 uint32_t width, height;
871 :     uint32_t horiz_mc_ref, vert_mc_ref;
872 : Isibaar 1.1
873 : edgomez 1.38 width = BitstreamGetBits(bs, 13);
874 :     READ_MARKER();
875 :     height = BitstreamGetBits(bs, 13);
876 :     READ_MARKER();
877 :     horiz_mc_ref = BitstreamGetBits(bs, 13);
878 :     READ_MARKER();
879 :     vert_mc_ref = BitstreamGetBits(bs, 13);
880 :     READ_MARKER();
881 : Isibaar 1.1
882 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "width %i\n", width);
883 :     DPRINTF(XVID_DEBUG_HEADER, "height %i\n", height);
884 :     DPRINTF(XVID_DEBUG_HEADER, "horiz_mc_ref %i\n", horiz_mc_ref);
885 :     DPRINTF(XVID_DEBUG_HEADER, "vert_mc_ref %i\n", vert_mc_ref);
886 : edgomez 1.38 }
887 :    
888 : edgomez 1.42 BitstreamSkip(bs, 1); /* change_conv_ratio_disable */
889 :     if (BitstreamGetBit(bs)) /* vop_constant_alpha */
890 : Isibaar 1.1 {
891 : edgomez 1.42 BitstreamSkip(bs, 8); /* vop_constant_alpha_value */
892 : Isibaar 1.1 }
893 :     }
894 :    
895 : edgomez 1.38 if (dec->shape != VIDOBJLAY_SHAPE_BINARY_ONLY) {
896 : edgomez 1.14
897 : edgomez 1.38 if (!dec->complexity_estimation_disable)
898 :     {
899 :     read_vop_complexity_estimation_header(bs, dec, coding_type);
900 :     }
901 :    
902 : edgomez 1.42 /* intra_dc_vlc_threshold */
903 : edgomez 1.14 *intra_dc_threshold =
904 :     intra_dc_threshold_table[BitstreamGetBits(bs, 3)];
905 : Isibaar 1.1
906 : edgomez 1.38 dec->top_field_first = 0;
907 :     dec->alternate_vertical_scan = 0;
908 :    
909 : edgomez 1.14 if (dec->interlacing) {
910 : suxen_drol 1.22 dec->top_field_first = BitstreamGetBit(bs);
911 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "interlace top_field_first %i\n", dec->top_field_first);
912 : suxen_drol 1.22 dec->alternate_vertical_scan = BitstreamGetBit(bs);
913 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "interlace alternate_vertical_scan %i\n", dec->alternate_vertical_scan);
914 :    
915 : h 1.4 }
916 : Isibaar 1.1 }
917 : edgomez 1.14
918 : edgomez 1.38 if ((dec->sprite_enable == SPRITE_STATIC || dec->sprite_enable== SPRITE_GMC) && coding_type == S_VOP) {
919 :    
920 :     int i;
921 :    
922 :     for (i = 0 ; i < dec->sprite_warping_points; i++)
923 :     {
924 :     int length;
925 :     int x = 0, y = 0;
926 :    
927 :     /* sprite code borowed from ffmpeg; thx Michael Niedermayer <michaelni@gmx.at> */
928 :     length = bs_get_spritetrajectory(bs);
929 :     if(length){
930 :     x= BitstreamGetBits(bs, length);
931 :     if ((x >> (length - 1)) == 0) /* if MSB not set it is negative*/
932 :     x = - (x ^ ((1 << length) - 1));
933 :     }
934 :     READ_MARKER();
935 : edgomez 1.42
936 : edgomez 1.38 length = bs_get_spritetrajectory(bs);
937 :     if(length){
938 :     y = BitstreamGetBits(bs, length);
939 :     if ((y >> (length - 1)) == 0) /* if MSB not set it is negative*/
940 :     y = - (y ^ ((1 << length) - 1));
941 :     }
942 :     READ_MARKER();
943 :    
944 :     gmc_warp->duv[i].x = x;
945 :     gmc_warp->duv[i].y = y;
946 :    
947 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER,"sprite_warping_point[%i] xy=(%i,%i)\n", i, x, y);
948 : edgomez 1.38 }
949 :    
950 :     if (dec->sprite_brightness_change)
951 :     {
952 : edgomez 1.42 /* XXX: brightness_change_factor() */
953 : edgomez 1.38 }
954 :     if (dec->sprite_enable == SPRITE_STATIC)
955 :     {
956 : edgomez 1.42 /* XXX: todo */
957 : edgomez 1.38 }
958 :    
959 :     }
960 :    
961 : edgomez 1.42 if ((*quant = BitstreamGetBits(bs, dec->quant_bits)) < 1) /* vop_quant */
962 : Isibaar 1.10 *quant = 1;
963 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "quant %i\n", *quant);
964 : edgomez 1.14
965 :     if (coding_type != I_VOP) {
966 : edgomez 1.42 *fcode_forward = BitstreamGetBits(bs, 3); /* fcode_forward */
967 :     DPRINTF(XVID_DEBUG_HEADER, "fcode_forward %i\n", *fcode_forward);
968 : Isibaar 1.1 }
969 : edgomez 1.14
970 :     if (coding_type == B_VOP) {
971 : edgomez 1.42 *fcode_backward = BitstreamGetBits(bs, 3); /* fcode_backward */
972 :     DPRINTF(XVID_DEBUG_HEADER, "fcode_backward %i\n", *fcode_backward);
973 : chenm001 1.9 }
974 : edgomez 1.14 if (!dec->scalability) {
975 :     if ((dec->shape != VIDOBJLAY_SHAPE_RECTANGULAR) &&
976 :     (coding_type != I_VOP)) {
977 : edgomez 1.42 BitstreamSkip(bs, 1); /* vop_shape_coding_type */
978 : chenm001 1.9 }
979 : Isibaar 1.1 }
980 :     return coding_type;
981 : suxen_drol 1.22
982 : edgomez 1.14 } else if (start_code == USERDATA_START_CODE) {
983 : edgomez 1.38 char tmp[256];
984 :     int i, version, build;
985 :     char packed;
986 :    
987 : edgomez 1.42 BitstreamSkip(bs, 32); /* user_data_start_code */
988 : edgomez 1.38
989 : edgomez 1.46 memset(tmp, 0, 256);
990 : edgomez 1.38 tmp[0] = BitstreamShowBits(bs, 8);
991 : edgomez 1.42
992 : edgomez 1.38 for(i = 1; i < 256; i++){
993 :     tmp[i] = (BitstreamShowBits(bs, 16) & 0xFF);
994 : edgomez 1.42
995 :     if(tmp[i] == 0)
996 : edgomez 1.38 break;
997 : edgomez 1.42
998 : edgomez 1.38 BitstreamSkip(bs, 8);
999 :     }
1000 : suxen_drol 1.22
1001 : edgomez 1.42 DPRINTF(XVID_DEBUG_STARTCODE, "<user_data>: %s\n", tmp);
1002 :    
1003 : Isibaar 1.40 /* read xvid bitstream version */
1004 :     if(strncmp(tmp, "XviD", 4) == 0) {
1005 : edgomez 1.42 if (tmp[strlen(tmp)-1] == 'C') {
1006 :     sscanf(tmp, "XviD%dC", &dec->bs_version);
1007 :     dec->cartoon_mode = 1;
1008 :     }
1009 :     else
1010 :     sscanf(tmp, "XviD%d", &dec->bs_version);
1011 :    
1012 : edgomez 1.44 DPRINTF(XVID_DEBUG_HEADER, "xvid bitstream version=%i\n", dec->bs_version);
1013 : Isibaar 1.40 }
1014 : suxen_drol 1.22
1015 : edgomez 1.38 /* divx detection */
1016 :     i = sscanf(tmp, "DivX%dBuild%d%c", &version, &build, &packed);
1017 :     if (i < 2)
1018 :     i = sscanf(tmp, "DivX%db%d%c", &version, &build, &packed);
1019 : edgomez 1.42
1020 : edgomez 1.38 if (i >= 2)
1021 :     {
1022 :     dec->packed_mode = (i == 3 && packed == 'p');
1023 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "divx version=%i, build=%i packed=%i\n",
1024 : edgomez 1.38 version, build, dec->packed_mode);
1025 :     }
1026 : suxen_drol 1.22
1027 : edgomez 1.42 } else /* start_code == ? */
1028 : Isibaar 1.1 {
1029 : edgomez 1.14 if (BitstreamShowBits(bs, 24) == 0x000001) {
1030 : edgomez 1.42 DPRINTF(XVID_DEBUG_STARTCODE, "<unknown: %x>\n", BitstreamShowBits(bs, 32));
1031 : Isibaar 1.1 }
1032 :     BitstreamSkip(bs, 8);
1033 :     }
1034 :     }
1035 :    
1036 : edgomez 1.42 #if 0
1037 :     DPRINTF("*** WARNING: no vop_start_code found");
1038 :     #endif
1039 : edgomez 1.14 return -1; /* ignore it */
1040 : Isibaar 1.1 }
1041 :    
1042 :    
1043 :     /* write custom quant matrix */
1044 :    
1045 : edgomez 1.14 static void
1046 :     bs_put_matrix(Bitstream * bs,
1047 : edgomez 1.42 const uint16_t * matrix)
1048 : Isibaar 1.1 {
1049 :     int i, j;
1050 :     const int last = matrix[scan_tables[0][63]];
1051 :    
1052 : suxen_drol 1.18 for (j = 63; j > 0 && matrix[scan_tables[0][j - 1]] == last; j--);
1053 : Isibaar 1.1
1054 : edgomez 1.14 for (i = 0; i <= j; i++) {
1055 : Isibaar 1.1 BitstreamPutBits(bs, matrix[scan_tables[0][i]], 8);
1056 :     }
1057 :    
1058 : edgomez 1.14 if (j < 63) {
1059 : Isibaar 1.1 BitstreamPutBits(bs, 0, 8);
1060 :     }
1061 :     }
1062 :    
1063 :    
1064 :     /*
1065 :     write vol header
1066 :     */
1067 : edgomez 1.14 void
1068 :     BitstreamWriteVolHeader(Bitstream * const bs,
1069 :     const MBParam * pParam,
1070 : edgomez 1.38 const FRAMEINFO * const frame)
1071 : Isibaar 1.1 {
1072 : edgomez 1.38 static const unsigned int vo_id = 0;
1073 :     static const unsigned int vol_id = 0;
1074 : edgomez 1.42 int vol_ver_id = 1;
1075 :     int vol_type_ind = VIDOBJLAY_TYPE_SIMPLE;
1076 :     int vol_profile = pParam->profile;
1077 :    
1078 :     if ( (pParam->vol_flags & XVID_VOL_QUARTERPEL) ||
1079 :     (pParam->vol_flags & XVID_VOL_GMC) ||
1080 :     (pParam->vol_flags & XVID_VOL_REDUCED_ENABLE))
1081 : edgomez 1.38 vol_ver_id = 2;
1082 :    
1083 : edgomez 1.42 if ((pParam->vol_flags & XVID_VOL_REDUCED_ENABLE)) {
1084 :     vol_type_ind = VIDOBJLAY_TYPE_ART_SIMPLE;
1085 :     }
1086 :    
1087 : suxen_drol 1.50 if ((pParam->vol_flags & (XVID_VOL_MPEGQUANT|XVID_VOL_QUARTERPEL|XVID_VOL_GMC|XVID_VOL_INTERLACING)) ||
1088 :     pParam->max_bframes>0) {
1089 : edgomez 1.42 vol_type_ind = VIDOBJLAY_TYPE_ASP;
1090 :     }
1091 : edgomez 1.38
1092 : edgomez 1.42 /* visual_object_sequence_start_code */
1093 :     #if 0
1094 :     BitstreamPad(bs);
1095 :     #endif
1096 : edgomez 1.38
1097 : edgomez 1.42 /*
1098 :     * no padding here, anymore. You have to make sure that you are
1099 :     * byte aligned, and that always 1-8 padding bits have been written
1100 :     */
1101 : edgomez 1.38
1102 : edgomez 1.42 if (!vol_profile) {
1103 :     /* Profile was not set by client app, use the more permissive profile
1104 :     * compatible with the vol_type_id */
1105 :     switch(vol_type_ind) {
1106 :     case VIDOBJLAY_TYPE_ASP:
1107 :     vol_profile = 0xf5; /* ASP level 5 */
1108 :     break;
1109 :     case VIDOBJLAY_TYPE_ART_SIMPLE:
1110 :     vol_profile = 0x94; /* ARTS level 4 */
1111 :     break;
1112 :     default:
1113 :     vol_profile = 0x03; /* Simple level 3 */
1114 :     break;
1115 :     }
1116 :     }
1117 :    
1118 :     /* Write the VOS header */
1119 : edgomez 1.38 BitstreamPutBits(bs, VISOBJSEQ_START_CODE, 32);
1120 : edgomez 1.42 BitstreamPutBits(bs, vol_profile, 8); /* profile_and_level_indication */
1121 : edgomez 1.38
1122 : edgomez 1.42
1123 :     /* visual_object_start_code */
1124 : edgomez 1.38 BitstreamPad(bs);
1125 :     BitstreamPutBits(bs, VISOBJ_START_CODE, 32);
1126 : edgomez 1.42 BitstreamPutBits(bs, 0, 1); /* is_visual_object_identifier */
1127 : edgomez 1.41
1128 :     /* Video type */
1129 : edgomez 1.42 BitstreamPutBits(bs, VISOBJ_TYPE_VIDEO, 4); /* visual_object_type */
1130 : edgomez 1.41 BitstreamPutBit(bs, 0); /* video_signal_type */
1131 :    
1132 : edgomez 1.42 /* video object_start_code & vo_id */
1133 :     BitstreamPadAlways(bs); /* next_start_code() */
1134 : edgomez 1.38 BitstreamPutBits(bs, VIDOBJ_START_CODE|(vo_id&0x5), 32);
1135 : Isibaar 1.1
1136 : edgomez 1.42 /* video_object_layer_start_code & vol_id */
1137 : edgomez 1.38 BitstreamPad(bs);
1138 :     BitstreamPutBits(bs, VIDOBJLAY_START_CODE|(vol_id&0x4), 32);
1139 : Isibaar 1.1
1140 : edgomez 1.42 BitstreamPutBit(bs, 0); /* random_accessible_vol */
1141 :     BitstreamPutBits(bs, vol_type_ind, 8); /* video_object_type_indication */
1142 : suxen_drol 1.12
1143 : edgomez 1.42 if (vol_ver_id == 1) {
1144 :     BitstreamPutBit(bs, 0); /* is_object_layer_identified (0=not given) */
1145 :     } else {
1146 :     BitstreamPutBit(bs, 1); /* is_object_layer_identified */
1147 :     BitstreamPutBits(bs, vol_ver_id, 4); /* vol_ver_id == 2 */
1148 :     BitstreamPutBits(bs, 4, 3); /* vol_ver_priority (1==highest, 7==lowest) */
1149 :     }
1150 :    
1151 :     /* Aspect ratio */
1152 :     BitstreamPutBits(bs, pParam->par, 4); /* aspect_ratio_info (1=1:1) */
1153 :     if(pParam->par == XVID_PAR_EXT) {
1154 :     BitstreamPutBits(bs, pParam->par_width, 8);
1155 :     BitstreamPutBits(bs, pParam->par_height, 8);
1156 : edgomez 1.38 }
1157 : chl 1.28
1158 : edgomez 1.42 BitstreamPutBit(bs, 1); /* vol_control_parameters */
1159 :     BitstreamPutBits(bs, 1, 2); /* chroma_format 1="4:2:0" */
1160 : suxen_drol 1.12
1161 : edgomez 1.38 if (pParam->max_bframes > 0) {
1162 : edgomez 1.42 BitstreamPutBit(bs, 0); /* low_delay */
1163 : edgomez 1.38 } else
1164 :     {
1165 : edgomez 1.42 BitstreamPutBit(bs, 1); /* low_delay */
1166 : edgomez 1.38 }
1167 : edgomez 1.42 BitstreamPutBit(bs, 0); /* vbv_parameters (0=not given) */
1168 : edgomez 1.38
1169 : edgomez 1.42 BitstreamPutBits(bs, 0, 2); /* video_object_layer_shape (0=rectangular) */
1170 : Isibaar 1.1
1171 :     WRITE_MARKER();
1172 : edgomez 1.14
1173 : edgomez 1.42 /*
1174 :     * time_inc_resolution; ignored by current decore versions
1175 :     * eg. 2fps res=2 inc=1
1176 :     * 25fps res=25 inc=1
1177 :     * 29.97fps res=30000 inc=1001
1178 : edgomez 1.14 */
1179 : suxen_drol 1.11 BitstreamPutBits(bs, pParam->fbase, 16);
1180 : edgomez 1.31
1181 : Isibaar 1.1 WRITE_MARKER();
1182 :    
1183 : Skal 1.52 if (pParam->fincr>0) {
1184 :     BitstreamPutBit(bs, 1); /* fixed_vop_rate = 1 */
1185 :     BitstreamPutBits(bs, pParam->fincr, MAX(log2bin(pParam->fbase-1),1)); /* fixed_vop_time_increment */
1186 :     }else{
1187 :     BitstreamPutBit(bs, 0); /* fixed_vop_rate = 0 */
1188 :     }
1189 : Isibaar 1.1
1190 :     WRITE_MARKER();
1191 : edgomez 1.42 BitstreamPutBits(bs, pParam->width, 13); /* width */
1192 : Isibaar 1.1 WRITE_MARKER();
1193 : edgomez 1.42 BitstreamPutBits(bs, pParam->height, 13); /* height */
1194 : Isibaar 1.1 WRITE_MARKER();
1195 : edgomez 1.14
1196 : edgomez 1.42 BitstreamPutBit(bs, pParam->vol_flags & XVID_VOL_INTERLACING); /* interlace */
1197 :     BitstreamPutBit(bs, 1); /* obmc_disable (overlapped block motion compensation) */
1198 : edgomez 1.38
1199 : edgomez 1.42 if (vol_ver_id != 1)
1200 :     { if ((pParam->vol_flags & XVID_VOL_GMC))
1201 :     { BitstreamPutBits(bs, 2, 2); /* sprite_enable=='GMC' */
1202 :     BitstreamPutBits(bs, 3, 6); /* no_of_sprite_warping_points */
1203 :     BitstreamPutBits(bs, 3, 2); /* sprite_warping_accuracy 0==1/2, 1=1/4, 2=1/8, 3=1/16 */
1204 :     BitstreamPutBit(bs, 0); /* sprite_brightness_change (not supported) */
1205 :    
1206 :     /*
1207 :     * currently we use no_of_sprite_warping_points==2, sprite_warping_accuracy==3
1208 :     * for DivX5 compatability
1209 :     */
1210 : edgomez 1.38
1211 :     } else
1212 : edgomez 1.42 BitstreamPutBits(bs, 0, 2); /* sprite_enable==off */
1213 : edgomez 1.38 }
1214 :     else
1215 : edgomez 1.42 BitstreamPutBit(bs, 0); /* sprite_enable==off */
1216 : edgomez 1.38
1217 : edgomez 1.42 BitstreamPutBit(bs, 0); /* not_8_bit */
1218 : Isibaar 1.1
1219 : edgomez 1.42 /* quant_type 0=h.263 1=mpeg4(quantizer tables) */
1220 :     BitstreamPutBit(bs, pParam->vol_flags & XVID_VOL_MPEGQUANT);
1221 : edgomez 1.14
1222 : edgomez 1.42 if ((pParam->vol_flags & XVID_VOL_MPEGQUANT)) {
1223 :     BitstreamPutBit(bs, is_custom_intra_matrix(pParam->mpeg_quant_matrices)); /* load_intra_quant_mat */
1224 :     if(is_custom_intra_matrix(pParam->mpeg_quant_matrices))
1225 :     bs_put_matrix(bs, get_intra_matrix(pParam->mpeg_quant_matrices));
1226 : Isibaar 1.1
1227 : edgomez 1.42 BitstreamPutBit(bs, is_custom_inter_matrix(pParam->mpeg_quant_matrices)); /* load_inter_quant_mat */
1228 :     if(is_custom_inter_matrix(pParam->mpeg_quant_matrices))
1229 :     bs_put_matrix(bs, get_inter_matrix(pParam->mpeg_quant_matrices));
1230 : Isibaar 1.1 }
1231 :    
1232 : edgomez 1.38 if (vol_ver_id != 1) {
1233 : edgomez 1.42 if ((pParam->vol_flags & XVID_VOL_QUARTERPEL))
1234 :     BitstreamPutBit(bs, 1); /* quarterpel */
1235 : edgomez 1.38 else
1236 : edgomez 1.42 BitstreamPutBit(bs, 0); /* no quarterpel */
1237 : edgomez 1.38 }
1238 :    
1239 : edgomez 1.42 BitstreamPutBit(bs, 1); /* complexity_estimation_disable */
1240 :     BitstreamPutBit(bs, 1); /* resync_marker_disable */
1241 :     BitstreamPutBit(bs, 0); /* data_partitioned */
1242 : edgomez 1.38
1243 : edgomez 1.42 if (vol_ver_id != 1) {
1244 :     BitstreamPutBit(bs, 0); /* newpred_enable */
1245 :     BitstreamPutBit(bs, (pParam->vol_flags & XVID_VOL_REDUCED_ENABLE)?1:0);
1246 : edgomez 1.38 /* reduced_resolution_vop_enabled */
1247 :     }
1248 :    
1249 : edgomez 1.42 BitstreamPutBit(bs, 0); /* scalability */
1250 :    
1251 :     BitstreamPadAlways(bs); /* next_start_code(); */
1252 : edgomez 1.41
1253 : suxen_drol 1.49 /* divx5 userdata string */
1254 : Skal 1.52 #define DIVX5_ID ((char *)"DivX503b1393")
1255 : suxen_drol 1.49 if ((pParam->global_flags & XVID_GLOBAL_DIVX5_USERDATA)) {
1256 :     BitstreamWriteUserData(bs, DIVX5_ID, strlen(DIVX5_ID));
1257 :     if (pParam->max_bframes > 0 && (pParam->global_flags & XVID_GLOBAL_PACKED))
1258 :     BitstreamPutBits(bs, 'p', 8);
1259 : edgomez 1.38 }
1260 :    
1261 :     /* xvid id */
1262 : edgomez 1.42 {
1263 : edgomez 1.43 const char xvid_user_format[] = "XviD%04d%c";
1264 :     char xvid_user_data[100];
1265 :     sprintf(xvid_user_data,
1266 :     xvid_user_format,
1267 :     XVID_BS_VERSION,
1268 :     (frame->vop_flags & XVID_VOP_CARTOON)?'C':'\0');
1269 :     BitstreamWriteUserData(bs, xvid_user_data, strlen(xvid_user_data));
1270 : edgomez 1.42 }
1271 : Isibaar 1.1 }
1272 :    
1273 :    
1274 :     /*
1275 :     write vop header
1276 :     */
1277 : edgomez 1.14 void
1278 : edgomez 1.38 BitstreamWriteVopHeader(
1279 :     Bitstream * const bs,
1280 : edgomez 1.14 const MBParam * pParam,
1281 : edgomez 1.38 const FRAMEINFO * const frame,
1282 : edgomez 1.42 int vop_coded,
1283 :     unsigned int quant)
1284 : Isibaar 1.1 {
1285 : suxen_drol 1.8 uint32_t i;
1286 : chl 1.28
1287 : edgomez 1.42 #if 0
1288 :     BitstreamPad(bs);
1289 :     #endif
1290 :    
1291 :     /*
1292 :     * no padding here, anymore. You have to make sure that you are
1293 :     * byte aligned, and that always 1-8 padding bits have been written
1294 :     */
1295 : edgomez 1.38
1296 : edgomez 1.14 BitstreamPutBits(bs, VOP_START_CODE, 32);
1297 :    
1298 :     BitstreamPutBits(bs, frame->coding_type, 2);
1299 : edgomez 1.42 #if 0
1300 :     DPRINTF(XVID_DEBUG_HEADER, "coding_type = %i\n", frame->coding_type);
1301 :     #endif
1302 : Isibaar 1.1
1303 : chl 1.28 for (i = 0; i < frame->seconds; i++) {
1304 :     BitstreamPutBit(bs, 1);
1305 :     }
1306 :     BitstreamPutBit(bs, 0);
1307 : Isibaar 1.1
1308 :     WRITE_MARKER();
1309 :    
1310 : edgomez 1.42 /* time_increment: value=nth_of_sec, nbits = log2(resolution) */
1311 : edgomez 1.43 BitstreamPutBits(bs, frame->ticks, MAX(log2bin(pParam->fbase-1), 1));
1312 : edgomez 1.42 #if 0
1313 :     DPRINTF("[%i:%i] %c",
1314 :     frame->seconds, frame->ticks,
1315 :     frame->coding_type == I_VOP ? 'I' :
1316 :     frame->coding_type == P_VOP ? 'P' :
1317 :     frame->coding_type == S_VOP ? 'S' : 'B');
1318 :     #endif
1319 : Isibaar 1.1
1320 :     WRITE_MARKER();
1321 :    
1322 : suxen_drol 1.17 if (!vop_coded) {
1323 :     BitstreamPutBits(bs, 0, 1);
1324 : edgomez 1.41 #if 0
1325 :     BitstreamPadAlways(bs); /* next_start_code() */
1326 :     #endif
1327 :     /* NB: It's up to the function caller to write the next_start_code().
1328 :     * At the moment encoder.c respects that requisite because a VOP
1329 :     * always ends with a next_start_code either if it's coded or not
1330 :     * and encoder.c terminates a frame with a next_start_code in whatever
1331 :     * case */
1332 : suxen_drol 1.17 return;
1333 :     }
1334 :    
1335 : edgomez 1.42 BitstreamPutBits(bs, 1, 1); /* vop_coded */
1336 : Isibaar 1.1
1337 : edgomez 1.38 if ( (frame->coding_type == P_VOP) || (frame->coding_type == S_VOP) )
1338 : suxen_drol 1.7 BitstreamPutBits(bs, frame->rounding_type, 1);
1339 : Isibaar 1.1
1340 : edgomez 1.42 if ((frame->vol_flags & XVID_VOL_REDUCED_ENABLE))
1341 : syskin 1.48 BitstreamPutBit(bs, 0);
1342 : edgomez 1.38
1343 : edgomez 1.42 BitstreamPutBits(bs, 0, 3); /* intra_dc_vlc_threshold */
1344 : edgomez 1.14
1345 : edgomez 1.42 if ((frame->vol_flags & XVID_VOL_INTERLACING)) {
1346 :     BitstreamPutBit(bs, (frame->vop_flags & XVID_VOP_TOPFIELDFIRST));
1347 :     BitstreamPutBit(bs, (frame->vop_flags & XVID_VOP_ALTERNATESCAN));
1348 : edgomez 1.38 }
1349 : edgomez 1.42
1350 : edgomez 1.38 if (frame->coding_type == S_VOP) {
1351 : edgomez 1.42 if (1) { /* no_of_sprite_warping_points>=1 (we use 2!) */
1352 : edgomez 1.38 int k;
1353 : edgomez 1.42 for (k=0;k<3;k++)
1354 : edgomez 1.38 {
1355 : edgomez 1.42 bs_put_spritetrajectory(bs, frame->warp.duv[k].x ); /* du[k] */
1356 : edgomez 1.38 WRITE_MARKER();
1357 : edgomez 1.42
1358 :     bs_put_spritetrajectory(bs, frame->warp.duv[k].y ); /* dv[k] */
1359 : edgomez 1.38 WRITE_MARKER();
1360 :    
1361 : edgomez 1.42 if ((frame->vol_flags & XVID_VOL_QUARTERPEL))
1362 : edgomez 1.38 {
1363 : edgomez 1.42 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);
1364 : edgomez 1.38 }
1365 :     else
1366 :     {
1367 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER,"sprite_warping_point[%i] xy=(%i,%i)\n", k, frame->warp.duv[k].x, frame->warp.duv[k].y);
1368 : edgomez 1.38 }
1369 :     }
1370 :     }
1371 : h 1.4 }
1372 :    
1373 : edgomez 1.38
1374 : edgomez 1.42 #if 0
1375 :     DPRINTF(XVID_DEBUG_HEADER, "quant = %i\n", quant);
1376 :     #endif
1377 :    
1378 :     BitstreamPutBits(bs, quant, 5); /* quantizer */
1379 : edgomez 1.14
1380 : suxen_drol 1.7 if (frame->coding_type != I_VOP)
1381 : edgomez 1.42 BitstreamPutBits(bs, frame->fcode, 3); /* forward_fixed_code */
1382 : suxen_drol 1.8
1383 :     if (frame->coding_type == B_VOP)
1384 : edgomez 1.42 BitstreamPutBits(bs, frame->bcode, 3); /* backward_fixed_code */
1385 : edgomez 1.38
1386 :     }
1387 :    
1388 : edgomez 1.42 void
1389 :     BitstreamWriteUserData(Bitstream * const bs,
1390 : Skal 1.52 const char *data,
1391 :     const unsigned int length)
1392 : edgomez 1.38 {
1393 :     int i;
1394 :    
1395 :     BitstreamPad(bs);
1396 :     BitstreamPutBits(bs, USERDATA_START_CODE, 32);
1397 :    
1398 :     for (i = 0; i < length; i++) {
1399 :     BitstreamPutBits(bs, data[i], 8);
1400 :     }
1401 : suxen_drol 1.17
1402 : chl 1.24 }
1403 : Skal 1.51
1404 :     /*
1405 :     * Group of VOP
1406 :     */
1407 :     void
1408 :     BitstreamWriteGroupOfVopHeader(Bitstream * const bs,
1409 :     const MBParam * pParam,
1410 :     uint32_t is_closed_gov)
1411 :     {
1412 :     int64_t time = (pParam->m_stamp + (pParam->fbase/2)) / pParam->fbase;
1413 :     int hours, minutes, seconds;
1414 :    
1415 :     /* compute time_code */
1416 :     seconds = time % 60; time /= 60;
1417 :     minutes = time % 60; time /= 60;
1418 :     hours = time % 24; /* don't overflow */
1419 :    
1420 :     BitstreamPutBits(bs, GRPOFVOP_START_CODE, 32);
1421 :     BitstreamPutBits(bs, hours, 5);
1422 :     BitstreamPutBits(bs, minutes, 6);
1423 :     BitstreamPutBit(bs, 1);
1424 :     BitstreamPutBits(bs, seconds, 6);
1425 :     BitstreamPutBits(bs, is_closed_gov, 1);
1426 :     BitstreamPutBits(bs, 0, 1); /* broken_link */
1427 :     }
1428 :    
1429 :     /*
1430 :     * End of Sequence
1431 :     */
1432 :     void
1433 :     BitstreamWriteEndOfSequence(Bitstream * const bs)
1434 :     {
1435 :     BitstreamPadAlways(bs);
1436 :     BitstreamPutBits(bs, VISOBJSEQ_STOP_CODE, 32);
1437 :     }
1438 :    
1439 :     /*
1440 :     * Video Packet (resync marker)
1441 :     */
1442 :    
1443 :     void write_video_packet_header(Bitstream * const bs,
1444 :     const MBParam * pParam,
1445 :     const FRAMEINFO * const frame,
1446 :     int mbnum)
1447 :     {
1448 :     const int mbnum_bits = log2bin(pParam->mb_width * pParam->mb_height - 1);
1449 :     uint32_t nbitsresyncmarker;
1450 : Skal 1.52
1451 :     if (frame->coding_type == I_VOP)
1452 :     nbitsresyncmarker = NUMBITS_VP_RESYNC_MARKER; /* 16 zeros followed by a 1. */
1453 :     else if (frame->coding_type == P_VOP)
1454 :     nbitsresyncmarker = NUMBITS_VP_RESYNC_MARKER-1 + frame->fcode;
1455 :     else /* B_VOP */
1456 :     nbitsresyncmarker = MAX(NUMBITS_VP_RESYNC_MARKER, NUMBITS_VP_RESYNC_MARKER-1 + MAX(frame->fcode, frame->bcode));
1457 :    
1458 : Skal 1.51 BitstreamPadAlways(bs);
1459 :     BitstreamPutBits(bs, RESYNC_MARKER, nbitsresyncmarker);
1460 :     BitstreamPutBits(bs, mbnum, mbnum_bits);
1461 :     BitstreamPutBits(bs, frame->quant, 5);
1462 :     BitstreamPutBit(bs, 0); /* hec */
1463 :     }

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