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Original Path: trunk/xvidcore/src/bitstream/bitstream.c

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 : syskin 1480 * $Id: bitstream.c,v 1.45 2004-07-09 14:52:56 syskin 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 : edgomez 195 static uint32_t __inline
37 :     log2bin(uint32_t value)
38 : Isibaar 3 {
39 :     int n = 0;
40 : edgomez 195
41 :     while (value) {
42 : Isibaar 3 value >>= 1;
43 :     n++;
44 :     }
45 :     return n;
46 :     }
47 :    
48 :    
49 : edgomez 195 static const uint32_t intra_dc_threshold_table[] = {
50 :     32, /* never use */
51 : Isibaar 3 13,
52 :     15,
53 :     17,
54 :     19,
55 :     21,
56 :     23,
57 :     1,
58 :     };
59 :    
60 :    
61 : edgomez 195 void
62 :     bs_get_matrix(Bitstream * bs,
63 :     uint8_t * matrix)
64 :     {
65 :     int i = 0;
66 :     int last, value = 0;
67 : Isibaar 4
68 : edgomez 195 do {
69 :     last = value;
70 :     value = BitstreamGetBits(bs, 8);
71 :     matrix[scan_tables[0][i++]] = value;
72 :     }
73 :     while (value != 0 && i < 64);
74 :    
75 : syskin 1480 if (value != 0) return;
76 :    
77 :     i--;
78 : edgomez 195 while (i < 64) {
79 :     matrix[scan_tables[0][i++]] = last;
80 :     }
81 :     }
82 :    
83 : suxen_drol 248
84 :    
85 : edgomez 1382 /*
86 :     * for PVOP addbits == fcode - 1
87 :     * for BVOP addbits == max(fcode,bcode) - 1
88 :     * returns mbpos
89 :     */
90 : suxen_drol 248 int
91 : edgomez 1382 read_video_packet_header(Bitstream *bs,
92 :     DECODER * dec,
93 :     const int addbits,
94 :     int * quant,
95 : edgomez 851 int * fcode_forward,
96 :     int * fcode_backward,
97 :     int * intra_dc_threshold)
98 : suxen_drol 248 {
99 : edgomez 851 int startcode_bits = NUMBITS_VP_RESYNC_MARKER + addbits;
100 :     int mbnum_bits = log2bin(dec->mb_width * dec->mb_height - 1);
101 : suxen_drol 248 int mbnum;
102 : edgomez 851 int hec = 0;
103 : suxen_drol 248
104 :     BitstreamSkip(bs, BitstreamNumBitsToByteAlign(bs));
105 : edgomez 851 BitstreamSkip(bs, startcode_bits);
106 : suxen_drol 248
107 : edgomez 1382 DPRINTF(XVID_DEBUG_STARTCODE, "<video_packet_header>\n");
108 : suxen_drol 252
109 : edgomez 851 if (dec->shape != VIDOBJLAY_SHAPE_RECTANGULAR)
110 :     {
111 :     hec = BitstreamGetBit(bs); /* header_extension_code */
112 : edgomez 1382 if (hec && !(dec->sprite_enable == SPRITE_STATIC /* && current_coding_type = I_VOP */))
113 : edgomez 851 {
114 :     BitstreamSkip(bs, 13); /* vop_width */
115 :     READ_MARKER();
116 :     BitstreamSkip(bs, 13); /* vop_height */
117 :     READ_MARKER();
118 :     BitstreamSkip(bs, 13); /* vop_horizontal_mc_spatial_ref */
119 :     READ_MARKER();
120 :     BitstreamSkip(bs, 13); /* vop_vertical_mc_spatial_ref */
121 :     READ_MARKER();
122 :     }
123 :     }
124 : suxen_drol 248
125 : edgomez 851 mbnum = BitstreamGetBits(bs, mbnum_bits); /* macroblock_number */
126 : edgomez 1382 DPRINTF(XVID_DEBUG_HEADER, "mbnum %i\n", mbnum);
127 : suxen_drol 248
128 : edgomez 851 if (dec->shape != VIDOBJLAY_SHAPE_BINARY_ONLY)
129 :     {
130 : edgomez 1382 *quant = BitstreamGetBits(bs, dec->quant_bits); /* quant_scale */
131 :     DPRINTF(XVID_DEBUG_HEADER, "quant %i\n", *quant);
132 : edgomez 851 }
133 : suxen_drol 248
134 : edgomez 851 if (dec->shape == VIDOBJLAY_SHAPE_RECTANGULAR)
135 :     hec = BitstreamGetBit(bs); /* header_extension_code */
136 :    
137 :    
138 : edgomez 1382 DPRINTF(XVID_DEBUG_HEADER, "header_extension_code %i\n", hec);
139 : edgomez 851 if (hec)
140 :     {
141 :     int time_base;
142 :     int time_increment;
143 :     int coding_type;
144 : suxen_drol 248
145 : edgomez 851 for (time_base=0; BitstreamGetBit(bs)!=0; time_base++); /* modulo_time_base */
146 :     READ_MARKER();
147 :     if (dec->time_inc_bits)
148 :     time_increment = (BitstreamGetBits(bs, dec->time_inc_bits)); /* vop_time_increment */
149 :     READ_MARKER();
150 : edgomez 1382 DPRINTF(XVID_DEBUG_HEADER,"time %i:%i\n", time_base, time_increment);
151 : edgomez 851
152 :     coding_type = BitstreamGetBits(bs, 2);
153 : edgomez 1382 DPRINTF(XVID_DEBUG_HEADER,"coding_type %i\n", coding_type);
154 :    
155 : edgomez 851 if (dec->shape != VIDOBJLAY_SHAPE_RECTANGULAR)
156 :     {
157 :     BitstreamSkip(bs, 1); /* change_conv_ratio_disable */
158 :     if (coding_type != I_VOP)
159 :     BitstreamSkip(bs, 1); /* vop_shape_coding_type */
160 :     }
161 :    
162 :     if (dec->shape != VIDOBJLAY_SHAPE_BINARY_ONLY)
163 :     {
164 :     *intra_dc_threshold = intra_dc_threshold_table[BitstreamGetBits(bs, 3)];
165 :    
166 :     if (dec->sprite_enable == SPRITE_GMC && coding_type == S_VOP &&
167 :     dec->sprite_warping_points > 0)
168 :     {
169 : edgomez 1382 /* TODO: sprite trajectory */
170 : edgomez 851 }
171 : edgomez 1382 if (dec->reduced_resolution_enable &&
172 : edgomez 851 dec->shape == VIDOBJLAY_SHAPE_RECTANGULAR &&
173 :     (coding_type == P_VOP || coding_type == I_VOP))
174 :     {
175 :     BitstreamSkip(bs, 1); /* XXX: vop_reduced_resolution */
176 :     }
177 :    
178 :     if (coding_type != I_VOP && fcode_forward)
179 :     {
180 :     *fcode_forward = BitstreamGetBits(bs, 3);
181 : edgomez 1382 DPRINTF(XVID_DEBUG_HEADER,"fcode_forward %i\n", *fcode_forward);
182 : edgomez 851 }
183 :    
184 :     if (coding_type == B_VOP && fcode_backward)
185 :     {
186 :     *fcode_backward = BitstreamGetBits(bs, 3);
187 : edgomez 1382 DPRINTF(XVID_DEBUG_HEADER,"fcode_backward %i\n", *fcode_backward);
188 : edgomez 851 }
189 :     }
190 :    
191 :     }
192 :    
193 :     if (dec->newpred_enable)
194 :     {
195 :     int vop_id;
196 :     int vop_id_for_prediction;
197 : edgomez 1382
198 : edgomez 851 vop_id = BitstreamGetBits(bs, MIN(dec->time_inc_bits + 3, 15));
199 : edgomez 1382 DPRINTF(XVID_DEBUG_HEADER, "vop_id %i\n", vop_id);
200 : edgomez 851 if (BitstreamGetBit(bs)) /* vop_id_for_prediction_indication */
201 :     {
202 :     vop_id_for_prediction = BitstreamGetBits(bs, MIN(dec->time_inc_bits + 3, 15));
203 : edgomez 1382 DPRINTF(XVID_DEBUG_HEADER, "vop_id_for_prediction %i\n", vop_id_for_prediction);
204 : edgomez 851 }
205 :     READ_MARKER();
206 :     }
207 :    
208 : suxen_drol 248 return mbnum;
209 :     }
210 :    
211 :    
212 :    
213 : edgomez 851
214 :     /* vol estimation header */
215 :     static void
216 :     read_vol_complexity_estimation_header(Bitstream * bs, DECODER * dec)
217 :     {
218 :     ESTIMATION * e = &dec->estimation;
219 :    
220 :     e->method = BitstreamGetBits(bs, 2); /* estimation_method */
221 : edgomez 1382 DPRINTF(XVID_DEBUG_HEADER,"+ complexity_estimation_header; method=%i\n", e->method);
222 : edgomez 851
223 : edgomez 1382 if (e->method == 0 || e->method == 1)
224 : edgomez 851 {
225 :     if (!BitstreamGetBit(bs)) /* shape_complexity_estimation_disable */
226 :     {
227 :     e->opaque = BitstreamGetBit(bs); /* opaque */
228 :     e->transparent = BitstreamGetBit(bs); /* transparent */
229 :     e->intra_cae = BitstreamGetBit(bs); /* intra_cae */
230 :     e->inter_cae = BitstreamGetBit(bs); /* inter_cae */
231 :     e->no_update = BitstreamGetBit(bs); /* no_update */
232 :     e->upsampling = BitstreamGetBit(bs); /* upsampling */
233 :     }
234 :    
235 :     if (!BitstreamGetBit(bs)) /* texture_complexity_estimation_set_1_disable */
236 :     {
237 :     e->intra_blocks = BitstreamGetBit(bs); /* intra_blocks */
238 :     e->inter_blocks = BitstreamGetBit(bs); /* inter_blocks */
239 :     e->inter4v_blocks = BitstreamGetBit(bs); /* inter4v_blocks */
240 :     e->not_coded_blocks = BitstreamGetBit(bs); /* not_coded_blocks */
241 :     }
242 :     }
243 :    
244 :     READ_MARKER();
245 :    
246 :     if (!BitstreamGetBit(bs)) /* texture_complexity_estimation_set_2_disable */
247 :     {
248 :     e->dct_coefs = BitstreamGetBit(bs); /* dct_coefs */
249 :     e->dct_lines = BitstreamGetBit(bs); /* dct_lines */
250 :     e->vlc_symbols = BitstreamGetBit(bs); /* vlc_symbols */
251 :     e->vlc_bits = BitstreamGetBit(bs); /* vlc_bits */
252 :     }
253 :    
254 :     if (!BitstreamGetBit(bs)) /* motion_compensation_complexity_disable */
255 :     {
256 :     e->apm = BitstreamGetBit(bs); /* apm */
257 :     e->npm = BitstreamGetBit(bs); /* npm */
258 :     e->interpolate_mc_q = BitstreamGetBit(bs); /* interpolate_mc_q */
259 :     e->forw_back_mc_q = BitstreamGetBit(bs); /* forw_back_mc_q */
260 :     e->halfpel2 = BitstreamGetBit(bs); /* halfpel2 */
261 :     e->halfpel4 = BitstreamGetBit(bs); /* halfpel4 */
262 :     }
263 :    
264 :     READ_MARKER();
265 :    
266 :     if (e->method == 1)
267 :     {
268 :     if (!BitstreamGetBit(bs)) /* version2_complexity_estimation_disable */
269 :     {
270 :     e->sadct = BitstreamGetBit(bs); /* sadct */
271 :     e->quarterpel = BitstreamGetBit(bs); /* quarterpel */
272 :     }
273 :     }
274 :     }
275 :    
276 :    
277 :     /* vop estimation header */
278 :     static void
279 :     read_vop_complexity_estimation_header(Bitstream * bs, DECODER * dec, int coding_type)
280 :     {
281 :     ESTIMATION * e = &dec->estimation;
282 :    
283 :     if (e->method == 0 || e->method == 1)
284 :     {
285 :     if (coding_type == I_VOP) {
286 :     if (e->opaque) BitstreamSkip(bs, 8); /* dcecs_opaque */
287 :     if (e->transparent) BitstreamSkip(bs, 8); /* */
288 :     if (e->intra_cae) BitstreamSkip(bs, 8); /* */
289 :     if (e->inter_cae) BitstreamSkip(bs, 8); /* */
290 :     if (e->no_update) BitstreamSkip(bs, 8); /* */
291 :     if (e->upsampling) BitstreamSkip(bs, 8); /* */
292 :     if (e->intra_blocks) BitstreamSkip(bs, 8); /* */
293 :     if (e->not_coded_blocks) BitstreamSkip(bs, 8); /* */
294 :     if (e->dct_coefs) BitstreamSkip(bs, 8); /* */
295 :     if (e->dct_lines) BitstreamSkip(bs, 8); /* */
296 :     if (e->vlc_symbols) BitstreamSkip(bs, 8); /* */
297 :     if (e->vlc_bits) BitstreamSkip(bs, 8); /* */
298 :     if (e->sadct) BitstreamSkip(bs, 8); /* */
299 :     }
300 : edgomez 1382
301 : edgomez 851 if (coding_type == P_VOP) {
302 :     if (e->opaque) BitstreamSkip(bs, 8); /* */
303 :     if (e->transparent) BitstreamSkip(bs, 8); /* */
304 :     if (e->intra_cae) BitstreamSkip(bs, 8); /* */
305 :     if (e->inter_cae) BitstreamSkip(bs, 8); /* */
306 :     if (e->no_update) BitstreamSkip(bs, 8); /* */
307 :     if (e->upsampling) BitstreamSkip(bs, 8); /* */
308 :     if (e->intra_blocks) BitstreamSkip(bs, 8); /* */
309 :     if (e->not_coded_blocks) BitstreamSkip(bs, 8); /* */
310 :     if (e->dct_coefs) BitstreamSkip(bs, 8); /* */
311 :     if (e->dct_lines) BitstreamSkip(bs, 8); /* */
312 :     if (e->vlc_symbols) BitstreamSkip(bs, 8); /* */
313 :     if (e->vlc_bits) BitstreamSkip(bs, 8); /* */
314 :     if (e->inter_blocks) BitstreamSkip(bs, 8); /* */
315 :     if (e->inter4v_blocks) BitstreamSkip(bs, 8); /* */
316 :     if (e->apm) BitstreamSkip(bs, 8); /* */
317 :     if (e->npm) BitstreamSkip(bs, 8); /* */
318 :     if (e->forw_back_mc_q) BitstreamSkip(bs, 8); /* */
319 :     if (e->halfpel2) BitstreamSkip(bs, 8); /* */
320 :     if (e->halfpel4) BitstreamSkip(bs, 8); /* */
321 :     if (e->sadct) BitstreamSkip(bs, 8); /* */
322 :     if (e->quarterpel) BitstreamSkip(bs, 8); /* */
323 :     }
324 :     if (coding_type == B_VOP) {
325 :     if (e->opaque) BitstreamSkip(bs, 8); /* */
326 :     if (e->transparent) BitstreamSkip(bs, 8); /* */
327 :     if (e->intra_cae) BitstreamSkip(bs, 8); /* */
328 :     if (e->inter_cae) BitstreamSkip(bs, 8); /* */
329 :     if (e->no_update) BitstreamSkip(bs, 8); /* */
330 :     if (e->upsampling) BitstreamSkip(bs, 8); /* */
331 :     if (e->intra_blocks) BitstreamSkip(bs, 8); /* */
332 :     if (e->not_coded_blocks) BitstreamSkip(bs, 8); /* */
333 :     if (e->dct_coefs) BitstreamSkip(bs, 8); /* */
334 :     if (e->dct_lines) BitstreamSkip(bs, 8); /* */
335 :     if (e->vlc_symbols) BitstreamSkip(bs, 8); /* */
336 :     if (e->vlc_bits) BitstreamSkip(bs, 8); /* */
337 :     if (e->inter_blocks) BitstreamSkip(bs, 8); /* */
338 :     if (e->inter4v_blocks) BitstreamSkip(bs, 8); /* */
339 :     if (e->apm) BitstreamSkip(bs, 8); /* */
340 :     if (e->npm) BitstreamSkip(bs, 8); /* */
341 :     if (e->forw_back_mc_q) BitstreamSkip(bs, 8); /* */
342 :     if (e->halfpel2) BitstreamSkip(bs, 8); /* */
343 :     if (e->halfpel4) BitstreamSkip(bs, 8); /* */
344 :     if (e->interpolate_mc_q) BitstreamSkip(bs, 8); /* */
345 :     if (e->sadct) BitstreamSkip(bs, 8); /* */
346 :     if (e->quarterpel) BitstreamSkip(bs, 8); /* */
347 :     }
348 :    
349 :     if (coding_type == S_VOP && dec->sprite_enable == SPRITE_STATIC) {
350 :     if (e->intra_blocks) BitstreamSkip(bs, 8); /* */
351 :     if (e->not_coded_blocks) BitstreamSkip(bs, 8); /* */
352 :     if (e->dct_coefs) BitstreamSkip(bs, 8); /* */
353 :     if (e->dct_lines) BitstreamSkip(bs, 8); /* */
354 :     if (e->vlc_symbols) BitstreamSkip(bs, 8); /* */
355 :     if (e->vlc_bits) BitstreamSkip(bs, 8); /* */
356 :     if (e->inter_blocks) BitstreamSkip(bs, 8); /* */
357 :     if (e->inter4v_blocks) BitstreamSkip(bs, 8); /* */
358 :     if (e->apm) BitstreamSkip(bs, 8); /* */
359 :     if (e->npm) BitstreamSkip(bs, 8); /* */
360 :     if (e->forw_back_mc_q) BitstreamSkip(bs, 8); /* */
361 :     if (e->halfpel2) BitstreamSkip(bs, 8); /* */
362 :     if (e->halfpel4) BitstreamSkip(bs, 8); /* */
363 :     if (e->interpolate_mc_q) BitstreamSkip(bs, 8); /* */
364 :     }
365 :     }
366 :     }
367 :    
368 :    
369 :    
370 :    
371 :    
372 : Isibaar 3 /*
373 :     decode headers
374 :     returns coding_type, or -1 if error
375 :     */
376 :    
377 : suxen_drol 252 #define VIDOBJ_START_CODE_MASK 0x0000001f
378 :     #define VIDOBJLAY_START_CODE_MASK 0x0000000f
379 :    
380 : edgomez 195 int
381 :     BitstreamReadHeaders(Bitstream * bs,
382 :     DECODER * dec,
383 :     uint32_t * rounding,
384 : edgomez 851 uint32_t * reduced_resolution,
385 : edgomez 195 uint32_t * quant,
386 :     uint32_t * fcode_forward,
387 :     uint32_t * fcode_backward,
388 : edgomez 851 uint32_t * intra_dc_threshold,
389 :     WARPPOINTS *gmc_warp)
390 : Isibaar 3 {
391 :     uint32_t vol_ver_id;
392 :     uint32_t coding_type;
393 :     uint32_t start_code;
394 : edgomez 195 uint32_t time_incr = 0;
395 : edgomez 876 int32_t time_increment = 0;
396 : edgomez 851 int resize = 0;
397 : chenm001 156
398 : edgomez 195 do {
399 : edgomez 851
400 : Isibaar 3 BitstreamByteAlign(bs);
401 :     start_code = BitstreamShowBits(bs, 32);
402 :    
403 : edgomez 195 if (start_code == VISOBJSEQ_START_CODE) {
404 : suxen_drol 252
405 :     int profile;
406 :    
407 : edgomez 1382 DPRINTF(XVID_DEBUG_STARTCODE, "<visual_object_sequence>\n");
408 : suxen_drol 252
409 : edgomez 1382 BitstreamSkip(bs, 32); /* visual_object_sequence_start_code */
410 :     profile = BitstreamGetBits(bs, 8); /* profile_and_level_indication */
411 : suxen_drol 252
412 : edgomez 1382 DPRINTF(XVID_DEBUG_HEADER, "profile_and_level_indication %i\n", profile);
413 : suxen_drol 252
414 : edgomez 195 } else if (start_code == VISOBJSEQ_STOP_CODE) {
415 : suxen_drol 252
416 : edgomez 1382 BitstreamSkip(bs, 32); /* visual_object_sequence_stop_code */
417 : suxen_drol 252
418 : edgomez 1382 DPRINTF(XVID_DEBUG_STARTCODE, "</visual_object_sequence>\n");
419 : suxen_drol 252
420 : edgomez 195 } else if (start_code == VISOBJ_START_CODE) {
421 : edgomez 851 int visobj_ver_id;
422 : suxen_drol 252
423 : edgomez 1382 DPRINTF(XVID_DEBUG_STARTCODE, "<visual_object>\n");
424 : suxen_drol 252
425 : edgomez 1382 BitstreamSkip(bs, 32); /* visual_object_start_code */
426 :     if (BitstreamGetBit(bs)) /* is_visual_object_identified */
427 : Isibaar 3 {
428 : edgomez 1382 visobj_ver_id = BitstreamGetBits(bs, 4); /* visual_object_ver_id */
429 :     DPRINTF(XVID_DEBUG_HEADER,"visobj_ver_id %i\n", visobj_ver_id);
430 :     BitstreamSkip(bs, 3); /* visual_object_priority */
431 : edgomez 195 } else {
432 : edgomez 851 visobj_ver_id = 1;
433 : Isibaar 3 }
434 :    
435 : edgomez 1382 if (BitstreamShowBits(bs, 4) != VISOBJ_TYPE_VIDEO) /* visual_object_type */
436 : Isibaar 3 {
437 : edgomez 1382 DPRINTF(XVID_DEBUG_ERROR, "visual_object_type != video\n");
438 : Isibaar 3 return -1;
439 :     }
440 :     BitstreamSkip(bs, 4);
441 :    
442 : edgomez 1382 /* video_signal_type */
443 : Isibaar 3
444 : edgomez 1382 if (BitstreamGetBit(bs)) /* video_signal_type */
445 : Isibaar 3 {
446 : edgomez 1382 DPRINTF(XVID_DEBUG_HEADER,"+ video_signal_type\n");
447 :     BitstreamSkip(bs, 3); /* video_format */
448 :     BitstreamSkip(bs, 1); /* video_range */
449 :     if (BitstreamGetBit(bs)) /* color_description */
450 : Isibaar 3 {
451 : edgomez 1382 DPRINTF(XVID_DEBUG_HEADER,"+ color_description");
452 :     BitstreamSkip(bs, 8); /* color_primaries */
453 :     BitstreamSkip(bs, 8); /* transfer_characteristics */
454 :     BitstreamSkip(bs, 8); /* matrix_coefficients */
455 : Isibaar 3 }
456 :     }
457 : suxen_drol 252 } else if ((start_code & ~VIDOBJ_START_CODE_MASK) == VIDOBJ_START_CODE) {
458 :    
459 : edgomez 1382 DPRINTF(XVID_DEBUG_STARTCODE, "<video_object>\n");
460 :     DPRINTF(XVID_DEBUG_HEADER, "vo id %i\n", start_code & VIDOBJ_START_CODE_MASK);
461 : suxen_drol 252
462 : edgomez 1382 BitstreamSkip(bs, 32); /* video_object_start_code */
463 : suxen_drol 252
464 :     } else if ((start_code & ~VIDOBJLAY_START_CODE_MASK) == VIDOBJLAY_START_CODE) {
465 :    
466 : edgomez 1382 DPRINTF(XVID_DEBUG_STARTCODE, "<video_object_layer>\n");
467 :     DPRINTF(XVID_DEBUG_HEADER, "vol id %i\n", start_code & VIDOBJLAY_START_CODE_MASK);
468 : suxen_drol 252
469 : edgomez 1382 BitstreamSkip(bs, 32); /* video_object_layer_start_code */
470 :     BitstreamSkip(bs, 1); /* random_accessible_vol */
471 : Isibaar 3
472 : edgomez 1382 BitstreamSkip(bs, 8); /* video_object_type_indication */
473 : Isibaar 3
474 : edgomez 1382 if (BitstreamGetBit(bs)) /* is_object_layer_identifier */
475 : Isibaar 3 {
476 : edgomez 1382 DPRINTF(XVID_DEBUG_HEADER, "+ is_object_layer_identifier\n");
477 :     vol_ver_id = BitstreamGetBits(bs, 4); /* video_object_layer_verid */
478 :     DPRINTF(XVID_DEBUG_HEADER,"ver_id %i\n", vol_ver_id);
479 :     BitstreamSkip(bs, 3); /* video_object_layer_priority */
480 : edgomez 195 } else {
481 : Isibaar 3 vol_ver_id = 1;
482 :     }
483 :    
484 : edgomez 851 dec->aspect_ratio = BitstreamGetBits(bs, 4);
485 :    
486 : edgomez 1382 if (dec->aspect_ratio == VIDOBJLAY_AR_EXTPAR) /* aspect_ratio_info */
487 : Isibaar 3 {
488 : edgomez 1382 DPRINTF(XVID_DEBUG_HEADER, "+ aspect_ratio_info\n");
489 :     dec->par_width = BitstreamGetBits(bs, 8); /* par_width */
490 :     dec->par_height = BitstreamGetBits(bs, 8); /* par_height */
491 : Isibaar 3 }
492 :    
493 : edgomez 1382 if (BitstreamGetBit(bs)) /* vol_control_parameters */
494 : Isibaar 3 {
495 : edgomez 1382 DPRINTF(XVID_DEBUG_HEADER, "+ vol_control_parameters\n");
496 :     BitstreamSkip(bs, 2); /* chroma_format */
497 :     dec->low_delay = BitstreamGetBit(bs); /* low_delay */
498 :     DPRINTF(XVID_DEBUG_HEADER, "low_delay %i\n", dec->low_delay);
499 :     if (BitstreamGetBit(bs)) /* vbv_parameters */
500 : Isibaar 3 {
501 : edgomez 851 unsigned int bitrate;
502 :     unsigned int buffer_size;
503 :     unsigned int occupancy;
504 :    
505 : edgomez 1382 DPRINTF(XVID_DEBUG_HEADER,"+ vbv_parameters\n");
506 : edgomez 851
507 : edgomez 1382 bitrate = BitstreamGetBits(bs,15) << 15; /* first_half_bit_rate */
508 : Isibaar 3 READ_MARKER();
509 : edgomez 1382 bitrate |= BitstreamGetBits(bs,15); /* latter_half_bit_rate */
510 : Isibaar 3 READ_MARKER();
511 : edgomez 1382
512 :     buffer_size = BitstreamGetBits(bs, 15) << 3; /* first_half_vbv_buffer_size */
513 : Isibaar 3 READ_MARKER();
514 : edgomez 1382 buffer_size |= BitstreamGetBits(bs, 3); /* latter_half_vbv_buffer_size */
515 : edgomez 851
516 : edgomez 1382 occupancy = BitstreamGetBits(bs, 11) << 15; /* first_half_vbv_occupancy */
517 : Isibaar 3 READ_MARKER();
518 : edgomez 1382 occupancy |= BitstreamGetBits(bs, 15); /* latter_half_vbv_occupancy */
519 : Isibaar 3 READ_MARKER();
520 : edgomez 195
521 : edgomez 1382 DPRINTF(XVID_DEBUG_HEADER,"bitrate %d (unit=400 bps)\n", bitrate);
522 :     DPRINTF(XVID_DEBUG_HEADER,"buffer_size %d (unit=16384 bits)\n", buffer_size);
523 :     DPRINTF(XVID_DEBUG_HEADER,"occupancy %d (unit=64 bits)\n", occupancy);
524 : Isibaar 3 }
525 : edgomez 851 }else{
526 :     dec->low_delay = dec->low_delay_default;
527 : Isibaar 3 }
528 :    
529 : edgomez 1382 dec->shape = BitstreamGetBits(bs, 2); /* video_object_layer_shape */
530 : edgomez 851
531 : edgomez 1382 DPRINTF(XVID_DEBUG_HEADER, "shape %i\n", dec->shape);
532 : edgomez 851 if (dec->shape != VIDOBJLAY_SHAPE_RECTANGULAR)
533 :     {
534 : edgomez 1382 DPRINTF(XVID_DEBUG_ERROR,"non-rectangular shapes are not supported\n");
535 : edgomez 851 }
536 : edgomez 195
537 :     if (dec->shape == VIDOBJLAY_SHAPE_GRAYSCALE && vol_ver_id != 1) {
538 : edgomez 1382 BitstreamSkip(bs, 4); /* video_object_layer_shape_extension */
539 : Isibaar 3 }
540 :    
541 :     READ_MARKER();
542 :    
543 : edgomez 1382 /********************** for decode B-frame time ***********************/
544 :     dec->time_inc_resolution = BitstreamGetBits(bs, 16); /* vop_time_increment_resolution */
545 :     DPRINTF(XVID_DEBUG_HEADER,"vop_time_increment_resolution %i\n", dec->time_inc_resolution);
546 : suxen_drol 252
547 : edgomez 1382 #if 0
548 :     dec->time_inc_resolution--;
549 :     #endif
550 : suxen_drol 252
551 : edgomez 851 if (dec->time_inc_resolution > 0) {
552 : edgomez 1466 dec->time_inc_bits = MAX(log2bin(dec->time_inc_resolution-1), 1);
553 : edgomez 195 } else {
554 : edgomez 1382 #if 0
555 :     dec->time_inc_bits = 0;
556 :     #endif
557 :     /* for "old" xvid compatibility, set time_inc_bits = 1 */
558 : Isibaar 3 dec->time_inc_bits = 1;
559 :     }
560 :    
561 :     READ_MARKER();
562 :    
563 : edgomez 1382 if (BitstreamGetBit(bs)) /* fixed_vop_rate */
564 : Isibaar 3 {
565 : edgomez 1382 DPRINTF(XVID_DEBUG_HEADER, "+ fixed_vop_rate\n");
566 :     BitstreamSkip(bs, dec->time_inc_bits); /* fixed_vop_time_increment */
567 : Isibaar 3 }
568 :    
569 : edgomez 195 if (dec->shape != VIDOBJLAY_SHAPE_BINARY_ONLY) {
570 : Isibaar 3
571 : edgomez 195 if (dec->shape == VIDOBJLAY_SHAPE_RECTANGULAR) {
572 : Isibaar 3 uint32_t width, height;
573 :    
574 :     READ_MARKER();
575 : edgomez 1382 width = BitstreamGetBits(bs, 13); /* video_object_layer_width */
576 : Isibaar 3 READ_MARKER();
577 : edgomez 1382 height = BitstreamGetBits(bs, 13); /* video_object_layer_height */
578 : Isibaar 3 READ_MARKER();
579 :    
580 : edgomez 1382 DPRINTF(XVID_DEBUG_HEADER, "width %i\n", width);
581 :     DPRINTF(XVID_DEBUG_HEADER, "height %i\n", height);
582 : suxen_drol 252
583 : edgomez 851 if (dec->width != width || dec->height != height)
584 :     {
585 :     if (dec->fixed_dimensions)
586 :     {
587 : edgomez 1382 DPRINTF(XVID_DEBUG_ERROR, "decoder width/height does not match bitstream\n");
588 : edgomez 851 return -1;
589 :     }
590 :     resize = 1;
591 : chenm001 294 dec->width = width;
592 :     dec->height = height;
593 : Isibaar 3 }
594 :     }
595 : h 69
596 : suxen_drol 252 dec->interlacing = BitstreamGetBit(bs);
597 : edgomez 1382 DPRINTF(XVID_DEBUG_HEADER, "interlacing %i\n", dec->interlacing);
598 : Isibaar 3
599 : edgomez 1382 if (!BitstreamGetBit(bs)) /* obmc_disable */
600 : Isibaar 3 {
601 : edgomez 1382 DPRINTF(XVID_DEBUG_ERROR, "obmc_disabled==false not supported\n");
602 :     /* TODO */
603 :     /* fucking divx4.02 has this enabled */
604 : Isibaar 3 }
605 :    
606 : edgomez 1382 dec->sprite_enable = BitstreamGetBits(bs, (vol_ver_id == 1 ? 1 : 2)); /* sprite_enable */
607 : edgomez 851
608 :     if (dec->sprite_enable == SPRITE_STATIC || dec->sprite_enable == SPRITE_GMC)
609 : Isibaar 3 {
610 : edgomez 851 int low_latency_sprite_enable;
611 :    
612 :     if (dec->sprite_enable != SPRITE_GMC)
613 :     {
614 :     int sprite_width;
615 :     int sprite_height;
616 :     int sprite_left_coord;
617 :     int sprite_top_coord;
618 : edgomez 1382 sprite_width = BitstreamGetBits(bs, 13); /* sprite_width */
619 : edgomez 851 READ_MARKER();
620 : edgomez 1382 sprite_height = BitstreamGetBits(bs, 13); /* sprite_height */
621 : edgomez 851 READ_MARKER();
622 : edgomez 1382 sprite_left_coord = BitstreamGetBits(bs, 13); /* sprite_left_coordinate */
623 : edgomez 851 READ_MARKER();
624 : edgomez 1382 sprite_top_coord = BitstreamGetBits(bs, 13); /* sprite_top_coordinate */
625 : edgomez 851 READ_MARKER();
626 :     }
627 : edgomez 1382 dec->sprite_warping_points = BitstreamGetBits(bs, 6); /* no_of_sprite_warping_points */
628 :     dec->sprite_warping_accuracy = BitstreamGetBits(bs, 2); /* sprite_warping_accuracy */
629 :     dec->sprite_brightness_change = BitstreamGetBits(bs, 1); /* brightness_change */
630 : edgomez 851 if (dec->sprite_enable != SPRITE_GMC)
631 :     {
632 : edgomez 1382 low_latency_sprite_enable = BitstreamGetBits(bs, 1); /* low_latency_sprite_enable */
633 : edgomez 851 }
634 : Isibaar 3 }
635 : edgomez 195
636 :     if (vol_ver_id != 1 &&
637 :     dec->shape != VIDOBJLAY_SHAPE_RECTANGULAR) {
638 : edgomez 1382 BitstreamSkip(bs, 1); /* sadct_disable */
639 : Isibaar 3 }
640 :    
641 : edgomez 1382 if (BitstreamGetBit(bs)) /* not_8_bit */
642 : Isibaar 3 {
643 : edgomez 1382 DPRINTF(XVID_DEBUG_HEADER, "not_8_bit==true (ignored)\n");
644 :     dec->quant_bits = BitstreamGetBits(bs, 4); /* quant_precision */
645 :     BitstreamSkip(bs, 4); /* bits_per_pixel */
646 : edgomez 195 } else {
647 : Isibaar 3 dec->quant_bits = 5;
648 :     }
649 :    
650 : edgomez 195 if (dec->shape == VIDOBJLAY_SHAPE_GRAYSCALE) {
651 : edgomez 1382 BitstreamSkip(bs, 1); /* no_gray_quant_update */
652 :     BitstreamSkip(bs, 1); /* composition_method */
653 :     BitstreamSkip(bs, 1); /* linear_composition */
654 : Isibaar 3 }
655 :    
656 : edgomez 1382 dec->quant_type = BitstreamGetBit(bs); /* quant_type */
657 :     DPRINTF(XVID_DEBUG_HEADER, "quant_type %i\n", dec->quant_type);
658 : Isibaar 3
659 : edgomez 195 if (dec->quant_type) {
660 : edgomez 1382 if (BitstreamGetBit(bs)) /* load_intra_quant_mat */
661 : Isibaar 3 {
662 : Isibaar 20 uint8_t matrix[64];
663 : edgomez 195
664 : edgomez 1382 DPRINTF(XVID_DEBUG_HEADER, "load_intra_quant_mat\n");
665 : suxen_drol 252
666 : Isibaar 4 bs_get_matrix(bs, matrix);
667 : edgomez 1382 set_intra_matrix(dec->mpeg_quant_matrices, matrix);
668 : edgomez 195 } else
669 : edgomez 1382 set_intra_matrix(dec->mpeg_quant_matrices, get_default_intra_matrix());
670 : Isibaar 4
671 : edgomez 1382 if (BitstreamGetBit(bs)) /* load_inter_quant_mat */
672 : Isibaar 3 {
673 : edgomez 195 uint8_t matrix[64];
674 :    
675 : edgomez 1382 DPRINTF(XVID_DEBUG_HEADER, "load_inter_quant_mat\n");
676 :    
677 : Isibaar 4 bs_get_matrix(bs, matrix);
678 : edgomez 1382 set_inter_matrix(dec->mpeg_quant_matrices, matrix);
679 : edgomez 195 } else
680 : edgomez 1382 set_inter_matrix(dec->mpeg_quant_matrices, get_default_inter_matrix());
681 : Isibaar 3
682 : edgomez 195 if (dec->shape == VIDOBJLAY_SHAPE_GRAYSCALE) {
683 : edgomez 1382 DPRINTF(XVID_DEBUG_ERROR, "greyscale matrix not supported\n");
684 : Isibaar 3 return -1;
685 :     }
686 : Isibaar 4
687 : Isibaar 3 }
688 :    
689 : edgomez 195
690 :     if (vol_ver_id != 1) {
691 : edgomez 1382 dec->quarterpel = BitstreamGetBit(bs); /* quarter_sample */
692 :     DPRINTF(XVID_DEBUG_HEADER,"quarterpel %i\n", dec->quarterpel);
693 : Isibaar 3 }
694 : Isibaar 333 else
695 :     dec->quarterpel = 0;
696 : Isibaar 3
697 : edgomez 1382
698 : edgomez 851 dec->complexity_estimation_disable = BitstreamGetBit(bs); /* complexity estimation disable */
699 :     if (!dec->complexity_estimation_disable)
700 : Isibaar 3 {
701 : edgomez 851 read_vol_complexity_estimation_header(bs, dec);
702 : Isibaar 3 }
703 :    
704 : edgomez 1382 BitstreamSkip(bs, 1); /* resync_marker_disable */
705 : Isibaar 3
706 : edgomez 1382 if (BitstreamGetBit(bs)) /* data_partitioned */
707 : Isibaar 3 {
708 : edgomez 1382 DPRINTF(XVID_DEBUG_ERROR, "data_partitioned not supported\n");
709 :     BitstreamSkip(bs, 1); /* reversible_vlc */
710 : Isibaar 3 }
711 :    
712 : edgomez 195 if (vol_ver_id != 1) {
713 : edgomez 851 dec->newpred_enable = BitstreamGetBit(bs);
714 : edgomez 1382 if (dec->newpred_enable) /* newpred_enable */
715 : Isibaar 3 {
716 : edgomez 1382 DPRINTF(XVID_DEBUG_HEADER, "+ newpred_enable\n");
717 :     BitstreamSkip(bs, 2); /* requested_upstream_message_type */
718 :     BitstreamSkip(bs, 1); /* newpred_segment_type */
719 : Isibaar 3 }
720 : edgomez 851 dec->reduced_resolution_enable = BitstreamGetBit(bs); /* reduced_resolution_vop_enable */
721 : edgomez 1382 DPRINTF(XVID_DEBUG_HEADER, "reduced_resolution_enable %i\n", dec->reduced_resolution_enable);
722 : Isibaar 3 }
723 : edgomez 851 else
724 :     {
725 :     dec->newpred_enable = 0;
726 :     dec->reduced_resolution_enable = 0;
727 :     }
728 : edgomez 195
729 : edgomez 851 dec->scalability = BitstreamGetBit(bs); /* scalability */
730 : edgomez 1382 if (dec->scalability)
731 : Isibaar 3 {
732 : edgomez 1382 DPRINTF(XVID_DEBUG_ERROR, "scalability not supported\n");
733 : edgomez 851 BitstreamSkip(bs, 1); /* hierarchy_type */
734 :     BitstreamSkip(bs, 4); /* ref_layer_id */
735 :     BitstreamSkip(bs, 1); /* ref_layer_sampling_direc */
736 :     BitstreamSkip(bs, 5); /* hor_sampling_factor_n */
737 :     BitstreamSkip(bs, 5); /* hor_sampling_factor_m */
738 :     BitstreamSkip(bs, 5); /* vert_sampling_factor_n */
739 :     BitstreamSkip(bs, 5); /* vert_sampling_factor_m */
740 :     BitstreamSkip(bs, 1); /* enhancement_type */
741 :     if(dec->shape == VIDOBJLAY_SHAPE_BINARY /* && hierarchy_type==0 */) {
742 :     BitstreamSkip(bs, 1); /* use_ref_shape */
743 :     BitstreamSkip(bs, 1); /* use_ref_texture */
744 :     BitstreamSkip(bs, 5); /* shape_hor_sampling_factor_n */
745 :     BitstreamSkip(bs, 5); /* shape_hor_sampling_factor_m */
746 :     BitstreamSkip(bs, 5); /* shape_vert_sampling_factor_n */
747 :     BitstreamSkip(bs, 5); /* shape_vert_sampling_factor_m */
748 :     }
749 : Isibaar 3 return -1;
750 :     }
751 : edgomez 1382 } else /* dec->shape == BINARY_ONLY */
752 : Isibaar 3 {
753 : edgomez 195 if (vol_ver_id != 1) {
754 : edgomez 851 dec->scalability = BitstreamGetBit(bs); /* scalability */
755 : edgomez 1382 if (dec->scalability)
756 : Isibaar 3 {
757 : edgomez 1382 DPRINTF(XVID_DEBUG_ERROR, "scalability not supported\n");
758 : edgomez 851 BitstreamSkip(bs, 4); /* ref_layer_id */
759 :     BitstreamSkip(bs, 5); /* hor_sampling_factor_n */
760 :     BitstreamSkip(bs, 5); /* hor_sampling_factor_m */
761 :     BitstreamSkip(bs, 5); /* vert_sampling_factor_n */
762 :     BitstreamSkip(bs, 5); /* vert_sampling_factor_m */
763 : Isibaar 3 return -1;
764 :     }
765 :     }
766 : edgomez 1382 BitstreamSkip(bs, 1); /* resync_marker_disable */
767 : Isibaar 3
768 :     }
769 :    
770 : edgomez 851 return (resize ? -3 : -2 ); /* VOL */
771 :    
772 : edgomez 195 } else if (start_code == GRPOFVOP_START_CODE) {
773 : suxen_drol 252
774 : edgomez 1382 DPRINTF(XVID_DEBUG_STARTCODE, "<group_of_vop>\n");
775 : suxen_drol 252
776 : Isibaar 3 BitstreamSkip(bs, 32);
777 :     {
778 :     int hours, minutes, seconds;
779 : edgomez 195
780 : Isibaar 3 hours = BitstreamGetBits(bs, 5);
781 :     minutes = BitstreamGetBits(bs, 6);
782 :     READ_MARKER();
783 :     seconds = BitstreamGetBits(bs, 6);
784 : edgomez 1382
785 :     DPRINTF(XVID_DEBUG_HEADER, "time %ih%im%is\n", hours,minutes,seconds);
786 : Isibaar 3 }
787 : edgomez 1382 BitstreamSkip(bs, 1); /* closed_gov */
788 :     BitstreamSkip(bs, 1); /* broken_link */
789 : suxen_drol 252
790 : edgomez 195 } else if (start_code == VOP_START_CODE) {
791 : suxen_drol 252
792 : edgomez 1382 DPRINTF(XVID_DEBUG_STARTCODE, "<vop>\n");
793 : suxen_drol 252
794 : edgomez 1382 BitstreamSkip(bs, 32); /* vop_start_code */
795 : Isibaar 3
796 : edgomez 1382 coding_type = BitstreamGetBits(bs, 2); /* vop_coding_type */
797 :     DPRINTF(XVID_DEBUG_HEADER, "coding_type %i\n", coding_type);
798 : Isibaar 3
799 : edgomez 1382 /*********************** for decode B-frame time ***********************/
800 :     while (BitstreamGetBit(bs) != 0) /* time_base */
801 : chenm001 156 time_incr++;
802 : edgomez 195
803 : Isibaar 3 READ_MARKER();
804 : edgomez 195
805 :     if (dec->time_inc_bits) {
806 : edgomez 1382 time_increment = (BitstreamGetBits(bs, dec->time_inc_bits)); /* vop_time_increment */
807 : Isibaar 3 }
808 : suxen_drol 240
809 : edgomez 1382 DPRINTF(XVID_DEBUG_HEADER, "time_base %i\n", time_incr);
810 :     DPRINTF(XVID_DEBUG_HEADER, "time_increment %i\n", time_increment);
811 : suxen_drol 252
812 : edgomez 1382 DPRINTF(XVID_DEBUG_TIMECODE, "%c %i:%i\n",
813 : edgomez 851 coding_type == I_VOP ? 'I' : coding_type == P_VOP ? 'P' : coding_type == B_VOP ? 'B' : 'S',
814 : suxen_drol 240 time_incr, time_increment);
815 :    
816 : edgomez 195 if (coding_type != B_VOP) {
817 :     dec->last_time_base = dec->time_base;
818 : chenm001 156 dec->time_base += time_incr;
819 : edgomez 1466 dec->time = dec->time_base*dec->time_inc_resolution + time_increment;
820 :     dec->time_pp = (int32_t)(dec->time - dec->last_non_b_time);
821 : edgomez 195 dec->last_non_b_time = dec->time;
822 :     } else {
823 : edgomez 1466 dec->time = (dec->last_time_base + time_incr)*dec->time_inc_resolution + time_increment;
824 :     dec->time_bp = dec->time_pp - (int32_t)(dec->last_non_b_time - dec->time);
825 : chenm001 156 }
826 : edgomez 1382 DPRINTF(XVID_DEBUG_HEADER,"time_pp=%i\n", dec->time_pp);
827 :     DPRINTF(XVID_DEBUG_HEADER,"time_bp=%i\n", dec->time_bp);
828 : Isibaar 3
829 :     READ_MARKER();
830 :    
831 : edgomez 1382 if (!BitstreamGetBit(bs)) /* vop_coded */
832 : Isibaar 3 {
833 : edgomez 1382 DPRINTF(XVID_DEBUG_HEADER, "vop_coded==false\n");
834 : Isibaar 3 return N_VOP;
835 :     }
836 :    
837 : edgomez 851 if (dec->newpred_enable)
838 :     {
839 :     int vop_id;
840 :     int vop_id_for_prediction;
841 : edgomez 1382
842 : edgomez 851 vop_id = BitstreamGetBits(bs, MIN(dec->time_inc_bits + 3, 15));
843 : edgomez 1382 DPRINTF(XVID_DEBUG_HEADER, "vop_id %i\n", vop_id);
844 : edgomez 851 if (BitstreamGetBit(bs)) /* vop_id_for_prediction_indication */
845 :     {
846 :     vop_id_for_prediction = BitstreamGetBits(bs, MIN(dec->time_inc_bits + 3, 15));
847 : edgomez 1382 DPRINTF(XVID_DEBUG_HEADER, "vop_id_for_prediction %i\n", vop_id_for_prediction);
848 : edgomez 851 }
849 :     READ_MARKER();
850 :     }
851 : Isibaar 3
852 : edgomez 851
853 : edgomez 1382
854 :     /* fix a little bug by MinChen <chenm002@163.com> */
855 : edgomez 195 if ((dec->shape != VIDOBJLAY_SHAPE_BINARY_ONLY) &&
856 : edgomez 851 ( (coding_type == P_VOP) || (coding_type == S_VOP && dec->sprite_enable == SPRITE_GMC) ) ) {
857 : edgomez 1382 *rounding = BitstreamGetBit(bs); /* rounding_type */
858 :     DPRINTF(XVID_DEBUG_HEADER, "rounding %i\n", *rounding);
859 : Isibaar 3 }
860 :    
861 : edgomez 851 if (dec->reduced_resolution_enable &&
862 :     dec->shape == VIDOBJLAY_SHAPE_RECTANGULAR &&
863 :     (coding_type == P_VOP || coding_type == I_VOP)) {
864 : Isibaar 3
865 : edgomez 851 *reduced_resolution = BitstreamGetBit(bs);
866 : edgomez 1382 DPRINTF(XVID_DEBUG_HEADER, "reduced_resolution %i\n", *reduced_resolution);
867 : edgomez 851 }
868 :     else
869 :     {
870 :     *reduced_resolution = 0;
871 :     }
872 :    
873 : edgomez 195 if (dec->shape != VIDOBJLAY_SHAPE_RECTANGULAR) {
874 : edgomez 851 if(!(dec->sprite_enable == SPRITE_STATIC && coding_type == I_VOP)) {
875 : edgomez 195
876 : edgomez 851 uint32_t width, height;
877 :     uint32_t horiz_mc_ref, vert_mc_ref;
878 : Isibaar 3
879 : edgomez 851 width = BitstreamGetBits(bs, 13);
880 :     READ_MARKER();
881 :     height = BitstreamGetBits(bs, 13);
882 :     READ_MARKER();
883 :     horiz_mc_ref = BitstreamGetBits(bs, 13);
884 :     READ_MARKER();
885 :     vert_mc_ref = BitstreamGetBits(bs, 13);
886 :     READ_MARKER();
887 : Isibaar 3
888 : edgomez 1382 DPRINTF(XVID_DEBUG_HEADER, "width %i\n", width);
889 :     DPRINTF(XVID_DEBUG_HEADER, "height %i\n", height);
890 :     DPRINTF(XVID_DEBUG_HEADER, "horiz_mc_ref %i\n", horiz_mc_ref);
891 :     DPRINTF(XVID_DEBUG_HEADER, "vert_mc_ref %i\n", vert_mc_ref);
892 : edgomez 851 }
893 :    
894 : edgomez 1382 BitstreamSkip(bs, 1); /* change_conv_ratio_disable */
895 :     if (BitstreamGetBit(bs)) /* vop_constant_alpha */
896 : Isibaar 3 {
897 : edgomez 1382 BitstreamSkip(bs, 8); /* vop_constant_alpha_value */
898 : Isibaar 3 }
899 :     }
900 :    
901 : edgomez 851 if (dec->shape != VIDOBJLAY_SHAPE_BINARY_ONLY) {
902 : edgomez 195
903 : edgomez 851 if (!dec->complexity_estimation_disable)
904 :     {
905 :     read_vop_complexity_estimation_header(bs, dec, coding_type);
906 :     }
907 :    
908 : edgomez 1382 /* intra_dc_vlc_threshold */
909 : edgomez 195 *intra_dc_threshold =
910 :     intra_dc_threshold_table[BitstreamGetBits(bs, 3)];
911 : Isibaar 3
912 : edgomez 851 dec->top_field_first = 0;
913 :     dec->alternate_vertical_scan = 0;
914 :    
915 : edgomez 195 if (dec->interlacing) {
916 : suxen_drol 252 dec->top_field_first = BitstreamGetBit(bs);
917 : edgomez 1382 DPRINTF(XVID_DEBUG_HEADER, "interlace top_field_first %i\n", dec->top_field_first);
918 : suxen_drol 252 dec->alternate_vertical_scan = BitstreamGetBit(bs);
919 : edgomez 1382 DPRINTF(XVID_DEBUG_HEADER, "interlace alternate_vertical_scan %i\n", dec->alternate_vertical_scan);
920 :    
921 : h 69 }
922 : Isibaar 3 }
923 : edgomez 195
924 : edgomez 851 if ((dec->sprite_enable == SPRITE_STATIC || dec->sprite_enable== SPRITE_GMC) && coding_type == S_VOP) {
925 :    
926 :     int i;
927 :    
928 :     for (i = 0 ; i < dec->sprite_warping_points; i++)
929 :     {
930 :     int length;
931 :     int x = 0, y = 0;
932 :    
933 :     /* sprite code borowed from ffmpeg; thx Michael Niedermayer <michaelni@gmx.at> */
934 :     length = bs_get_spritetrajectory(bs);
935 :     if(length){
936 :     x= BitstreamGetBits(bs, length);
937 :     if ((x >> (length - 1)) == 0) /* if MSB not set it is negative*/
938 :     x = - (x ^ ((1 << length) - 1));
939 :     }
940 :     READ_MARKER();
941 : edgomez 1382
942 : edgomez 851 length = bs_get_spritetrajectory(bs);
943 :     if(length){
944 :     y = BitstreamGetBits(bs, length);
945 :     if ((y >> (length - 1)) == 0) /* if MSB not set it is negative*/
946 :     y = - (y ^ ((1 << length) - 1));
947 :     }
948 :     READ_MARKER();
949 :    
950 :     gmc_warp->duv[i].x = x;
951 :     gmc_warp->duv[i].y = y;
952 :    
953 : edgomez 1382 DPRINTF(XVID_DEBUG_HEADER,"sprite_warping_point[%i] xy=(%i,%i)\n", i, x, y);
954 : edgomez 851 }
955 :    
956 :     if (dec->sprite_brightness_change)
957 :     {
958 : edgomez 1382 /* XXX: brightness_change_factor() */
959 : edgomez 851 }
960 :     if (dec->sprite_enable == SPRITE_STATIC)
961 :     {
962 : edgomez 1382 /* XXX: todo */
963 : edgomez 851 }
964 :    
965 :     }
966 :    
967 : edgomez 1382 if ((*quant = BitstreamGetBits(bs, dec->quant_bits)) < 1) /* vop_quant */
968 : Isibaar 157 *quant = 1;
969 : edgomez 1382 DPRINTF(XVID_DEBUG_HEADER, "quant %i\n", *quant);
970 : edgomez 195
971 :     if (coding_type != I_VOP) {
972 : edgomez 1382 *fcode_forward = BitstreamGetBits(bs, 3); /* fcode_forward */
973 :     DPRINTF(XVID_DEBUG_HEADER, "fcode_forward %i\n", *fcode_forward);
974 : Isibaar 3 }
975 : edgomez 195
976 :     if (coding_type == B_VOP) {
977 : edgomez 1382 *fcode_backward = BitstreamGetBits(bs, 3); /* fcode_backward */
978 :     DPRINTF(XVID_DEBUG_HEADER, "fcode_backward %i\n", *fcode_backward);
979 : Isibaar 3 }
980 : edgomez 195 if (!dec->scalability) {
981 :     if ((dec->shape != VIDOBJLAY_SHAPE_RECTANGULAR) &&
982 :     (coding_type != I_VOP)) {
983 : edgomez 1382 BitstreamSkip(bs, 1); /* vop_shape_coding_type */
984 : chenm001 156 }
985 :     }
986 : Isibaar 3 return coding_type;
987 : suxen_drol 252
988 : edgomez 195 } else if (start_code == USERDATA_START_CODE) {
989 : edgomez 851 char tmp[256];
990 :     int i, version, build;
991 :     char packed;
992 : suxen_drol 252
993 : edgomez 1382 BitstreamSkip(bs, 32); /* user_data_start_code */
994 : suxen_drol 252
995 : edgomez 851 tmp[0] = BitstreamShowBits(bs, 8);
996 : edgomez 1382
997 : edgomez 851 for(i = 1; i < 256; i++){
998 :     tmp[i] = (BitstreamShowBits(bs, 16) & 0xFF);
999 : edgomez 1382
1000 :     if(tmp[i] == 0)
1001 : edgomez 851 break;
1002 : edgomez 1382
1003 : edgomez 851 BitstreamSkip(bs, 8);
1004 :     }
1005 : suxen_drol 252
1006 : edgomez 1382 DPRINTF(XVID_DEBUG_STARTCODE, "<user_data>: %s\n", tmp);
1007 :    
1008 : Isibaar 1055 /* read xvid bitstream version */
1009 :     if(strncmp(tmp, "XviD", 4) == 0) {
1010 : edgomez 1382 if (tmp[strlen(tmp)-1] == 'C') {
1011 :     sscanf(tmp, "XviD%dC", &dec->bs_version);
1012 :     dec->cartoon_mode = 1;
1013 :     }
1014 :     else
1015 :     sscanf(tmp, "XviD%d", &dec->bs_version);
1016 :    
1017 : edgomez 1466 DPRINTF(XVID_DEBUG_HEADER, "xvid bitstream version=%i\n", dec->bs_version);
1018 : Isibaar 1055 }
1019 : edgomez 851
1020 :     /* divx detection */
1021 :     i = sscanf(tmp, "DivX%dBuild%d%c", &version, &build, &packed);
1022 :     if (i < 2)
1023 :     i = sscanf(tmp, "DivX%db%d%c", &version, &build, &packed);
1024 : edgomez 1382
1025 : edgomez 851 if (i >= 2)
1026 :     {
1027 :     dec->packed_mode = (i == 3 && packed == 'p');
1028 : edgomez 1382 DPRINTF(XVID_DEBUG_HEADER, "divx version=%i, build=%i packed=%i\n",
1029 : edgomez 851 version, build, dec->packed_mode);
1030 :     }
1031 :    
1032 : edgomez 1382 } else /* start_code == ? */
1033 : Isibaar 3 {
1034 : edgomez 195 if (BitstreamShowBits(bs, 24) == 0x000001) {
1035 : edgomez 1382 DPRINTF(XVID_DEBUG_STARTCODE, "<unknown: %x>\n", BitstreamShowBits(bs, 32));
1036 : Isibaar 3 }
1037 :     BitstreamSkip(bs, 8);
1038 :     }
1039 :     }
1040 :     while ((BitstreamPos(bs) >> 3) < bs->length);
1041 :    
1042 : edgomez 1382 #if 0
1043 :     DPRINTF("*** WARNING: no vop_start_code found");
1044 :     #endif
1045 : edgomez 195 return -1; /* ignore it */
1046 : Isibaar 3 }
1047 :    
1048 :    
1049 :     /* write custom quant matrix */
1050 :    
1051 : edgomez 195 static void
1052 :     bs_put_matrix(Bitstream * bs,
1053 : edgomez 1382 const uint16_t * matrix)
1054 : Isibaar 3 {
1055 :     int i, j;
1056 :     const int last = matrix[scan_tables[0][63]];
1057 :    
1058 : suxen_drol 233 for (j = 63; j > 0 && matrix[scan_tables[0][j - 1]] == last; j--);
1059 : Isibaar 3
1060 : edgomez 195 for (i = 0; i <= j; i++) {
1061 : Isibaar 3 BitstreamPutBits(bs, matrix[scan_tables[0][i]], 8);
1062 :     }
1063 :    
1064 : edgomez 195 if (j < 63) {
1065 : Isibaar 3 BitstreamPutBits(bs, 0, 8);
1066 :     }
1067 :     }
1068 :    
1069 :    
1070 :     /*
1071 :     write vol header
1072 :     */
1073 : edgomez 195 void
1074 :     BitstreamWriteVolHeader(Bitstream * const bs,
1075 :     const MBParam * pParam,
1076 : edgomez 851 const FRAMEINFO * const frame)
1077 : Isibaar 3 {
1078 : edgomez 851 static const unsigned int vo_id = 0;
1079 :     static const unsigned int vol_id = 0;
1080 : edgomez 1382 int vol_ver_id = 1;
1081 :     int vol_type_ind = VIDOBJLAY_TYPE_SIMPLE;
1082 :     int vol_profile = pParam->profile;
1083 : edgomez 851
1084 : edgomez 1382 if ( (pParam->vol_flags & XVID_VOL_QUARTERPEL) ||
1085 :     (pParam->vol_flags & XVID_VOL_GMC) ||
1086 :     (pParam->vol_flags & XVID_VOL_REDUCED_ENABLE))
1087 : edgomez 851 vol_ver_id = 2;
1088 :    
1089 : edgomez 1382 if ((pParam->vol_flags & XVID_VOL_REDUCED_ENABLE)) {
1090 :     vol_type_ind = VIDOBJLAY_TYPE_ART_SIMPLE;
1091 :     }
1092 : edgomez 851
1093 : edgomez 1382 if ((pParam->vol_flags & XVID_VOL_QUARTERPEL) ||
1094 :     (pParam->vol_flags & XVID_VOL_GMC)) {
1095 :     vol_type_ind = VIDOBJLAY_TYPE_ASP;
1096 :     }
1097 : edgomez 851
1098 : edgomez 1382 /* visual_object_sequence_start_code */
1099 :     #if 0
1100 :     BitstreamPad(bs);
1101 :     #endif
1102 : edgomez 851
1103 : edgomez 1382 /*
1104 :     * no padding here, anymore. You have to make sure that you are
1105 :     * byte aligned, and that always 1-8 padding bits have been written
1106 :     */
1107 :    
1108 :     if (!vol_profile) {
1109 :     /* Profile was not set by client app, use the more permissive profile
1110 :     * compatible with the vol_type_id */
1111 :     switch(vol_type_ind) {
1112 :     case VIDOBJLAY_TYPE_ASP:
1113 :     vol_profile = 0xf5; /* ASP level 5 */
1114 :     break;
1115 :     case VIDOBJLAY_TYPE_ART_SIMPLE:
1116 :     vol_profile = 0x94; /* ARTS level 4 */
1117 :     break;
1118 :     default:
1119 :     vol_profile = 0x03; /* Simple level 3 */
1120 :     break;
1121 :     }
1122 :     }
1123 :    
1124 :     /* Write the VOS header */
1125 : edgomez 851 BitstreamPutBits(bs, VISOBJSEQ_START_CODE, 32);
1126 : edgomez 1382 BitstreamPutBits(bs, vol_profile, 8); /* profile_and_level_indication */
1127 : edgomez 851
1128 : edgomez 1382
1129 :     /* visual_object_start_code */
1130 : edgomez 195 BitstreamPad(bs);
1131 : edgomez 851 BitstreamPutBits(bs, VISOBJ_START_CODE, 32);
1132 : edgomez 1382 BitstreamPutBits(bs, 0, 1); /* is_visual_object_identifier */
1133 : edgomez 1098
1134 :     /* Video type */
1135 : edgomez 1382 BitstreamPutBits(bs, VISOBJ_TYPE_VIDEO, 4); /* visual_object_type */
1136 : edgomez 1098 BitstreamPutBit(bs, 0); /* video_signal_type */
1137 :    
1138 : edgomez 1382 /* video object_start_code & vo_id */
1139 :     BitstreamPadAlways(bs); /* next_start_code() */
1140 : edgomez 851 BitstreamPutBits(bs, VIDOBJ_START_CODE|(vo_id&0x5), 32);
1141 : Isibaar 3
1142 : edgomez 1382 /* video_object_layer_start_code & vol_id */
1143 : edgomez 851 BitstreamPad(bs);
1144 :     BitstreamPutBits(bs, VIDOBJLAY_START_CODE|(vol_id&0x4), 32);
1145 : Isibaar 3
1146 : edgomez 1382 BitstreamPutBit(bs, 0); /* random_accessible_vol */
1147 :     BitstreamPutBits(bs, vol_type_ind, 8); /* video_object_type_indication */
1148 : suxen_drol 164
1149 : edgomez 1382 if (vol_ver_id == 1) {
1150 :     BitstreamPutBit(bs, 0); /* is_object_layer_identified (0=not given) */
1151 :     } else {
1152 :     BitstreamPutBit(bs, 1); /* is_object_layer_identified */
1153 :     BitstreamPutBits(bs, vol_ver_id, 4); /* vol_ver_id == 2 */
1154 :     BitstreamPutBits(bs, 4, 3); /* vol_ver_priority (1==highest, 7==lowest) */
1155 : edgomez 851 }
1156 : edgomez 1382
1157 :     /* Aspect ratio */
1158 :     BitstreamPutBits(bs, pParam->par, 4); /* aspect_ratio_info (1=1:1) */
1159 :     if(pParam->par == XVID_PAR_EXT) {
1160 :     BitstreamPutBits(bs, pParam->par_width, 8);
1161 :     BitstreamPutBits(bs, pParam->par_height, 8);
1162 : edgomez 851 }
1163 : chl 387
1164 : edgomez 1382 BitstreamPutBit(bs, 1); /* vol_control_parameters */
1165 :     BitstreamPutBits(bs, 1, 2); /* chroma_format 1="4:2:0" */
1166 : edgomez 487
1167 : edgomez 851 if (pParam->max_bframes > 0) {
1168 : edgomez 1382 BitstreamPutBit(bs, 0); /* low_delay */
1169 : edgomez 851 } else
1170 :     {
1171 : edgomez 1382 BitstreamPutBit(bs, 1); /* low_delay */
1172 : edgomez 851 }
1173 : edgomez 1382 BitstreamPutBit(bs, 0); /* vbv_parameters (0=not given) */
1174 : Isibaar 3
1175 : edgomez 1382 BitstreamPutBits(bs, 0, 2); /* video_object_layer_shape (0=rectangular) */
1176 : edgomez 851
1177 : Isibaar 3 WRITE_MARKER();
1178 : edgomez 195
1179 : edgomez 1382 /*
1180 :     * time_inc_resolution; ignored by current decore versions
1181 :     * eg. 2fps res=2 inc=1
1182 :     * 25fps res=25 inc=1
1183 :     * 29.97fps res=30000 inc=1001
1184 : edgomez 195 */
1185 : suxen_drol 163 BitstreamPutBits(bs, pParam->fbase, 16);
1186 : Isibaar 3
1187 :     WRITE_MARKER();
1188 :    
1189 : edgomez 1382 if (pParam->fincr>0) {
1190 : edgomez 1451 BitstreamPutBit(bs, 1); /* fixed_vop_rate = 1 */
1191 :     BitstreamPutBits(bs, pParam->fincr, MAX(log2bin(pParam->fbase-1),1)); /* fixed_vop_time_increment */
1192 : edgomez 1382 }else{
1193 :     BitstreamPutBit(bs, 0); /* fixed_vop_rate = 0 */
1194 :     }
1195 : Isibaar 3
1196 :     WRITE_MARKER();
1197 : edgomez 1382 BitstreamPutBits(bs, pParam->width, 13); /* width */
1198 : Isibaar 3 WRITE_MARKER();
1199 : edgomez 1382 BitstreamPutBits(bs, pParam->height, 13); /* height */
1200 : Isibaar 3 WRITE_MARKER();
1201 : edgomez 195
1202 : edgomez 1382 BitstreamPutBit(bs, pParam->vol_flags & XVID_VOL_INTERLACING); /* interlace */
1203 :     BitstreamPutBit(bs, 1); /* obmc_disable (overlapped block motion compensation) */
1204 : Isibaar 3
1205 : edgomez 1382 if (vol_ver_id != 1)
1206 :     { if ((pParam->vol_flags & XVID_VOL_GMC))
1207 :     { BitstreamPutBits(bs, 2, 2); /* sprite_enable=='GMC' */
1208 :     BitstreamPutBits(bs, 3, 6); /* no_of_sprite_warping_points */
1209 :     BitstreamPutBits(bs, 3, 2); /* sprite_warping_accuracy 0==1/2, 1=1/4, 2=1/8, 3=1/16 */
1210 :     BitstreamPutBit(bs, 0); /* sprite_brightness_change (not supported) */
1211 : edgomez 851
1212 : edgomez 1382 /*
1213 :     * currently we use no_of_sprite_warping_points==2, sprite_warping_accuracy==3
1214 :     * for DivX5 compatability
1215 :     */
1216 : edgomez 851
1217 :     } else
1218 : edgomez 1382 BitstreamPutBits(bs, 0, 2); /* sprite_enable==off */
1219 : edgomez 851 }
1220 :     else
1221 : edgomez 1382 BitstreamPutBit(bs, 0); /* sprite_enable==off */
1222 : edgomez 851
1223 : edgomez 1382 BitstreamPutBit(bs, 0); /* not_8_bit */
1224 : edgomez 851
1225 : edgomez 1382 /* quant_type 0=h.263 1=mpeg4(quantizer tables) */
1226 :     BitstreamPutBit(bs, pParam->vol_flags & XVID_VOL_MPEGQUANT);
1227 : edgomez 195
1228 : edgomez 1382 if ((pParam->vol_flags & XVID_VOL_MPEGQUANT)) {
1229 :     BitstreamPutBit(bs, is_custom_intra_matrix(pParam->mpeg_quant_matrices)); /* load_intra_quant_mat */
1230 :     if(is_custom_intra_matrix(pParam->mpeg_quant_matrices))
1231 :     bs_put_matrix(bs, get_intra_matrix(pParam->mpeg_quant_matrices));
1232 : Isibaar 3
1233 : edgomez 1382 BitstreamPutBit(bs, is_custom_inter_matrix(pParam->mpeg_quant_matrices)); /* load_inter_quant_mat */
1234 :     if(is_custom_inter_matrix(pParam->mpeg_quant_matrices))
1235 :     bs_put_matrix(bs, get_inter_matrix(pParam->mpeg_quant_matrices));
1236 : Isibaar 3 }
1237 :    
1238 : edgomez 851 if (vol_ver_id != 1) {
1239 : edgomez 1382 if ((pParam->vol_flags & XVID_VOL_QUARTERPEL))
1240 :     BitstreamPutBit(bs, 1); /* quarterpel */
1241 : edgomez 851 else
1242 : edgomez 1382 BitstreamPutBit(bs, 0); /* no quarterpel */
1243 : edgomez 851 }
1244 :    
1245 : edgomez 1382 BitstreamPutBit(bs, 1); /* complexity_estimation_disable */
1246 :     BitstreamPutBit(bs, 1); /* resync_marker_disable */
1247 :     BitstreamPutBit(bs, 0); /* data_partitioned */
1248 : edgomez 851
1249 : edgomez 1382 if (vol_ver_id != 1) {
1250 :     BitstreamPutBit(bs, 0); /* newpred_enable */
1251 :     BitstreamPutBit(bs, (pParam->vol_flags & XVID_VOL_REDUCED_ENABLE)?1:0);
1252 : edgomez 851 /* reduced_resolution_vop_enabled */
1253 :     }
1254 :    
1255 : edgomez 1382 BitstreamPutBit(bs, 0); /* scalability */
1256 : edgomez 1098
1257 : edgomez 1382 BitstreamPadAlways(bs); /* next_start_code(); */
1258 :    
1259 : edgomez 851 /* fake divx5 id, to ensure compatibility with divx5 decoder */
1260 : edgomez 1382 #define DIVX5_ID "DivX999b000p"
1261 :     if (pParam->max_bframes > 0 && (pParam->global_flags & XVID_GLOBAL_PACKED)) {
1262 : edgomez 851 BitstreamWriteUserData(bs, DIVX5_ID, strlen(DIVX5_ID));
1263 :     }
1264 :    
1265 :     /* xvid id */
1266 : edgomez 1382 {
1267 : edgomez 1451 const char xvid_user_format[] = "XviD%04d%c";
1268 :     char xvid_user_data[100];
1269 :     sprintf(xvid_user_data,
1270 :     xvid_user_format,
1271 :     XVID_BS_VERSION,
1272 :     (frame->vop_flags & XVID_VOP_CARTOON)?'C':'\0');
1273 :     BitstreamWriteUserData(bs, xvid_user_data, strlen(xvid_user_data));
1274 : edgomez 1382 }
1275 : Isibaar 3 }
1276 :    
1277 :    
1278 :     /*
1279 :     write vop header
1280 :     */
1281 : edgomez 195 void
1282 : edgomez 851 BitstreamWriteVopHeader(
1283 :     Bitstream * const bs,
1284 : edgomez 195 const MBParam * pParam,
1285 : edgomez 851 const FRAMEINFO * const frame,
1286 : edgomez 1382 int vop_coded,
1287 :     unsigned int quant)
1288 : Isibaar 3 {
1289 : suxen_drol 152 uint32_t i;
1290 : chl 387
1291 : edgomez 1382 #if 0
1292 :     BitstreamPad(bs);
1293 :     #endif
1294 : edgomez 851
1295 : edgomez 1382 /*
1296 :     * no padding here, anymore. You have to make sure that you are
1297 :     * byte aligned, and that always 1-8 padding bits have been written
1298 :     */
1299 :    
1300 : edgomez 195 BitstreamPutBits(bs, VOP_START_CODE, 32);
1301 : Isibaar 3
1302 : edgomez 195 BitstreamPutBits(bs, frame->coding_type, 2);
1303 : edgomez 1382 #if 0
1304 :     DPRINTF(XVID_DEBUG_HEADER, "coding_type = %i\n", frame->coding_type);
1305 :     #endif
1306 : edgomez 195
1307 :     for (i = 0; i < frame->seconds; i++) {
1308 : suxen_drol 152 BitstreamPutBit(bs, 1);
1309 :     }
1310 :     BitstreamPutBit(bs, 0);
1311 : Isibaar 3
1312 :     WRITE_MARKER();
1313 :    
1314 : edgomez 1382 /* time_increment: value=nth_of_sec, nbits = log2(resolution) */
1315 : edgomez 1451 BitstreamPutBits(bs, frame->ticks, MAX(log2bin(pParam->fbase-1), 1));
1316 : edgomez 1382 #if 0
1317 :     DPRINTF("[%i:%i] %c",
1318 :     frame->seconds, frame->ticks,
1319 :     frame->coding_type == I_VOP ? 'I' :
1320 :     frame->coding_type == P_VOP ? 'P' :
1321 :     frame->coding_type == S_VOP ? 'S' : 'B');
1322 :     #endif
1323 : Isibaar 3
1324 :     WRITE_MARKER();
1325 :    
1326 : suxen_drol 229 if (!vop_coded) {
1327 :     BitstreamPutBits(bs, 0, 1);
1328 : edgomez 1098 #if 0
1329 :     BitstreamPadAlways(bs); /* next_start_code() */
1330 :     #endif
1331 :     /* NB: It's up to the function caller to write the next_start_code().
1332 :     * At the moment encoder.c respects that requisite because a VOP
1333 :     * always ends with a next_start_code either if it's coded or not
1334 :     * and encoder.c terminates a frame with a next_start_code in whatever
1335 :     * case */
1336 : suxen_drol 229 return;
1337 :     }
1338 :    
1339 : edgomez 1382 BitstreamPutBits(bs, 1, 1); /* vop_coded */
1340 : Isibaar 3
1341 : edgomez 851 if ( (frame->coding_type == P_VOP) || (frame->coding_type == S_VOP) )
1342 : suxen_drol 136 BitstreamPutBits(bs, frame->rounding_type, 1);
1343 : Isibaar 3
1344 : edgomez 1382 if ((frame->vol_flags & XVID_VOL_REDUCED_ENABLE))
1345 :     BitstreamPutBit(bs, (frame->vop_flags & XVID_VOP_REDUCED)?1:0);
1346 : edgomez 195
1347 : edgomez 1382 BitstreamPutBits(bs, 0, 3); /* intra_dc_vlc_threshold */
1348 : edgomez 851
1349 : edgomez 1382 if ((frame->vol_flags & XVID_VOL_INTERLACING)) {
1350 :     BitstreamPutBit(bs, (frame->vop_flags & XVID_VOP_TOPFIELDFIRST));
1351 :     BitstreamPutBit(bs, (frame->vop_flags & XVID_VOP_ALTERNATESCAN));
1352 : h 69 }
1353 : edgomez 1382
1354 : edgomez 851 if (frame->coding_type == S_VOP) {
1355 : edgomez 1382 if (1) { /* no_of_sprite_warping_points>=1 (we use 2!) */
1356 : edgomez 851 int k;
1357 : edgomez 1382 for (k=0;k<3;k++)
1358 : edgomez 851 {
1359 : edgomez 1382 bs_put_spritetrajectory(bs, frame->warp.duv[k].x ); /* du[k] */
1360 : edgomez 851 WRITE_MARKER();
1361 : edgomez 1382
1362 :     bs_put_spritetrajectory(bs, frame->warp.duv[k].y ); /* dv[k] */
1363 : edgomez 851 WRITE_MARKER();
1364 : h 69
1365 : edgomez 1382 if ((frame->vol_flags & XVID_VOL_QUARTERPEL))
1366 : edgomez 851 {
1367 : 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);
1368 : edgomez 851 }
1369 :     else
1370 :     {
1371 : 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);
1372 : edgomez 851 }
1373 :     }
1374 :     }
1375 :     }
1376 : edgomez 195
1377 : edgomez 851
1378 : edgomez 1382 #if 0
1379 :     DPRINTF(XVID_DEBUG_HEADER, "quant = %i\n", quant);
1380 :     #endif
1381 : edgomez 851
1382 : edgomez 1382 BitstreamPutBits(bs, quant, 5); /* quantizer */
1383 :    
1384 : suxen_drol 136 if (frame->coding_type != I_VOP)
1385 : edgomez 1382 BitstreamPutBits(bs, frame->fcode, 3); /* forward_fixed_code */
1386 : suxen_drol 152
1387 :     if (frame->coding_type == B_VOP)
1388 : edgomez 1382 BitstreamPutBits(bs, frame->bcode, 3); /* backward_fixed_code */
1389 : suxen_drol 152
1390 : Isibaar 3 }
1391 : edgomez 851
1392 : edgomez 1382 void
1393 :     BitstreamWriteUserData(Bitstream * const bs,
1394 :     uint8_t * data,
1395 : edgomez 851 const int length)
1396 :     {
1397 :     int i;
1398 :    
1399 :     BitstreamPad(bs);
1400 :     BitstreamPutBits(bs, USERDATA_START_CODE, 32);
1401 :    
1402 :     for (i = 0; i < length; i++) {
1403 :     BitstreamPutBits(bs, data[i], 8);
1404 :     }
1405 :    
1406 :     }

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