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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 : suxen_drol 1.50 * $Id: bitstream.c,v 1.49 2005/03/27 03:59:42 suxen_drol 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 : edgomez 1.14 static uint32_t __inline
37 :     log2bin(uint32_t value)
38 : Isibaar 1.1 {
39 :     int n = 0;
40 : edgomez 1.14
41 :     while (value) {
42 : Isibaar 1.1 value >>= 1;
43 :     n++;
44 :     }
45 :     return n;
46 :     }
47 :    
48 :    
49 : edgomez 1.14 static const uint32_t intra_dc_threshold_table[] = {
50 :     32, /* never use */
51 : Isibaar 1.1 13,
52 :     15,
53 :     17,
54 :     19,
55 :     21,
56 :     23,
57 :     1,
58 :     };
59 :    
60 :    
61 : edgomez 1.14 void
62 :     bs_get_matrix(Bitstream * bs,
63 :     uint8_t * matrix)
64 :     {
65 :     int i = 0;
66 :     int last, value = 0;
67 :    
68 :     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 1.45 if (value != 0) return;
76 :    
77 :     i--;
78 : edgomez 1.14 while (i < 64) {
79 :     matrix[scan_tables[0][i++]] = last;
80 :     }
81 :     }
82 : Isibaar 1.2
83 : suxen_drol 1.21
84 :    
85 : edgomez 1.42 /*
86 :     * for PVOP addbits == fcode - 1
87 :     * for BVOP addbits == max(fcode,bcode) - 1
88 :     * returns mbpos
89 :     */
90 : suxen_drol 1.21 int
91 : edgomez 1.42 read_video_packet_header(Bitstream *bs,
92 :     DECODER * dec,
93 :     const int addbits,
94 :     int * quant,
95 : edgomez 1.38 int * fcode_forward,
96 :     int * fcode_backward,
97 :     int * intra_dc_threshold)
98 : suxen_drol 1.21 {
99 : edgomez 1.38 int startcode_bits = NUMBITS_VP_RESYNC_MARKER + addbits;
100 :     int mbnum_bits = log2bin(dec->mb_width * dec->mb_height - 1);
101 : suxen_drol 1.21 int mbnum;
102 : edgomez 1.38 int hec = 0;
103 : suxen_drol 1.21
104 :     BitstreamSkip(bs, BitstreamNumBitsToByteAlign(bs));
105 : edgomez 1.38 BitstreamSkip(bs, startcode_bits);
106 : suxen_drol 1.21
107 : edgomez 1.42 DPRINTF(XVID_DEBUG_STARTCODE, "<video_packet_header>\n");
108 : suxen_drol 1.22
109 : edgomez 1.38 if (dec->shape != VIDOBJLAY_SHAPE_RECTANGULAR)
110 :     {
111 :     hec = BitstreamGetBit(bs); /* header_extension_code */
112 : edgomez 1.42 if (hec && !(dec->sprite_enable == SPRITE_STATIC /* && current_coding_type = I_VOP */))
113 : edgomez 1.38 {
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 :    
125 :     mbnum = BitstreamGetBits(bs, mbnum_bits); /* macroblock_number */
126 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "mbnum %i\n", mbnum);
127 : suxen_drol 1.21
128 : edgomez 1.38 if (dec->shape != VIDOBJLAY_SHAPE_BINARY_ONLY)
129 :     {
130 : edgomez 1.42 *quant = BitstreamGetBits(bs, dec->quant_bits); /* quant_scale */
131 :     DPRINTF(XVID_DEBUG_HEADER, "quant %i\n", *quant);
132 : edgomez 1.38 }
133 : suxen_drol 1.21
134 : edgomez 1.38 if (dec->shape == VIDOBJLAY_SHAPE_RECTANGULAR)
135 :     hec = BitstreamGetBit(bs); /* header_extension_code */
136 : suxen_drol 1.21
137 :    
138 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "header_extension_code %i\n", hec);
139 : edgomez 1.38 if (hec)
140 :     {
141 :     int time_base;
142 :     int time_increment;
143 :     int coding_type;
144 :    
145 :     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 1.42 DPRINTF(XVID_DEBUG_HEADER,"time %i:%i\n", time_base, time_increment);
151 : edgomez 1.38
152 :     coding_type = BitstreamGetBits(bs, 2);
153 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER,"coding_type %i\n", coding_type);
154 :    
155 : edgomez 1.38 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 1.42 /* TODO: sprite trajectory */
170 : edgomez 1.38 }
171 : edgomez 1.42 if (dec->reduced_resolution_enable &&
172 : edgomez 1.38 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 1.42 DPRINTF(XVID_DEBUG_HEADER,"fcode_forward %i\n", *fcode_forward);
182 : edgomez 1.38 }
183 :    
184 :     if (coding_type == B_VOP && fcode_backward)
185 :     {
186 :     *fcode_backward = BitstreamGetBits(bs, 3);
187 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER,"fcode_backward %i\n", *fcode_backward);
188 : edgomez 1.38 }
189 :     }
190 :    
191 :     }
192 :    
193 :     if (dec->newpred_enable)
194 :     {
195 :     int vop_id;
196 :     int vop_id_for_prediction;
197 : edgomez 1.42
198 : edgomez 1.38 vop_id = BitstreamGetBits(bs, MIN(dec->time_inc_bits + 3, 15));
199 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "vop_id %i\n", vop_id);
200 : edgomez 1.38 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 1.42 DPRINTF(XVID_DEBUG_HEADER, "vop_id_for_prediction %i\n", vop_id_for_prediction);
204 : edgomez 1.38 }
205 :     READ_MARKER();
206 :     }
207 : suxen_drol 1.21
208 :     return mbnum;
209 :     }
210 :    
211 :    
212 :    
213 : edgomez 1.38
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 1.42 DPRINTF(XVID_DEBUG_HEADER,"+ complexity_estimation_header; method=%i\n", e->method);
222 : edgomez 1.38
223 : edgomez 1.42 if (e->method == 0 || e->method == 1)
224 : edgomez 1.38 {
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 1.42
301 : edgomez 1.38 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 1.1 /*
373 :     decode headers
374 :     returns coding_type, or -1 if error
375 :     */
376 :    
377 : suxen_drol 1.22 #define VIDOBJ_START_CODE_MASK 0x0000001f
378 :     #define VIDOBJLAY_START_CODE_MASK 0x0000000f
379 :    
380 : edgomez 1.14 int
381 :     BitstreamReadHeaders(Bitstream * bs,
382 :     DECODER * dec,
383 :     uint32_t * rounding,
384 :     uint32_t * quant,
385 :     uint32_t * fcode_forward,
386 :     uint32_t * fcode_backward,
387 : edgomez 1.38 uint32_t * intra_dc_threshold,
388 :     WARPPOINTS *gmc_warp)
389 : Isibaar 1.1 {
390 :     uint32_t vol_ver_id;
391 :     uint32_t coding_type;
392 :     uint32_t start_code;
393 : edgomez 1.14 uint32_t time_incr = 0;
394 : edgomez 1.39 int32_t time_increment = 0;
395 : edgomez 1.38 int resize = 0;
396 : chenm001 1.9
397 : syskin 1.47 while ((BitstreamPos(bs) >> 3) + 4 <= bs->length) {
398 : edgomez 1.38
399 : Isibaar 1.1 BitstreamByteAlign(bs);
400 :     start_code = BitstreamShowBits(bs, 32);
401 :    
402 : edgomez 1.14 if (start_code == VISOBJSEQ_START_CODE) {
403 : suxen_drol 1.22
404 :     int profile;
405 :    
406 : edgomez 1.42 DPRINTF(XVID_DEBUG_STARTCODE, "<visual_object_sequence>\n");
407 : suxen_drol 1.22
408 : edgomez 1.42 BitstreamSkip(bs, 32); /* visual_object_sequence_start_code */
409 :     profile = BitstreamGetBits(bs, 8); /* profile_and_level_indication */
410 : suxen_drol 1.22
411 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "profile_and_level_indication %i\n", profile);
412 : suxen_drol 1.22
413 : edgomez 1.14 } else if (start_code == VISOBJSEQ_STOP_CODE) {
414 : suxen_drol 1.22
415 : edgomez 1.42 BitstreamSkip(bs, 32); /* visual_object_sequence_stop_code */
416 : suxen_drol 1.22
417 : edgomez 1.42 DPRINTF(XVID_DEBUG_STARTCODE, "</visual_object_sequence>\n");
418 : suxen_drol 1.22
419 : edgomez 1.14 } else if (start_code == VISOBJ_START_CODE) {
420 : edgomez 1.38 int visobj_ver_id;
421 : suxen_drol 1.22
422 : edgomez 1.42 DPRINTF(XVID_DEBUG_STARTCODE, "<visual_object>\n");
423 : suxen_drol 1.22
424 : edgomez 1.42 BitstreamSkip(bs, 32); /* visual_object_start_code */
425 :     if (BitstreamGetBit(bs)) /* is_visual_object_identified */
426 : Isibaar 1.1 {
427 : edgomez 1.42 visobj_ver_id = BitstreamGetBits(bs, 4); /* visual_object_ver_id */
428 :     DPRINTF(XVID_DEBUG_HEADER,"visobj_ver_id %i\n", visobj_ver_id);
429 :     BitstreamSkip(bs, 3); /* visual_object_priority */
430 : edgomez 1.14 } else {
431 : edgomez 1.38 visobj_ver_id = 1;
432 : Isibaar 1.1 }
433 :    
434 : edgomez 1.42 if (BitstreamShowBits(bs, 4) != VISOBJ_TYPE_VIDEO) /* visual_object_type */
435 : Isibaar 1.1 {
436 : edgomez 1.42 DPRINTF(XVID_DEBUG_ERROR, "visual_object_type != video\n");
437 : Isibaar 1.1 return -1;
438 :     }
439 :     BitstreamSkip(bs, 4);
440 :    
441 : edgomez 1.42 /* video_signal_type */
442 : Isibaar 1.1
443 : edgomez 1.42 if (BitstreamGetBit(bs)) /* video_signal_type */
444 : Isibaar 1.1 {
445 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER,"+ video_signal_type\n");
446 :     BitstreamSkip(bs, 3); /* video_format */
447 :     BitstreamSkip(bs, 1); /* video_range */
448 :     if (BitstreamGetBit(bs)) /* color_description */
449 : Isibaar 1.1 {
450 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER,"+ color_description");
451 :     BitstreamSkip(bs, 8); /* color_primaries */
452 :     BitstreamSkip(bs, 8); /* transfer_characteristics */
453 :     BitstreamSkip(bs, 8); /* matrix_coefficients */
454 : Isibaar 1.1 }
455 :     }
456 : suxen_drol 1.22 } else if ((start_code & ~VIDOBJ_START_CODE_MASK) == VIDOBJ_START_CODE) {
457 :    
458 : edgomez 1.42 DPRINTF(XVID_DEBUG_STARTCODE, "<video_object>\n");
459 :     DPRINTF(XVID_DEBUG_HEADER, "vo id %i\n", start_code & VIDOBJ_START_CODE_MASK);
460 : suxen_drol 1.22
461 : edgomez 1.42 BitstreamSkip(bs, 32); /* video_object_start_code */
462 : suxen_drol 1.22
463 :     } else if ((start_code & ~VIDOBJLAY_START_CODE_MASK) == VIDOBJLAY_START_CODE) {
464 :    
465 : edgomez 1.42 DPRINTF(XVID_DEBUG_STARTCODE, "<video_object_layer>\n");
466 :     DPRINTF(XVID_DEBUG_HEADER, "vol id %i\n", start_code & VIDOBJLAY_START_CODE_MASK);
467 : Isibaar 1.1
468 : edgomez 1.42 BitstreamSkip(bs, 32); /* video_object_layer_start_code */
469 :     BitstreamSkip(bs, 1); /* random_accessible_vol */
470 : Isibaar 1.1
471 : edgomez 1.42 BitstreamSkip(bs, 8); /* video_object_type_indication */
472 : Isibaar 1.1
473 : edgomez 1.42 if (BitstreamGetBit(bs)) /* is_object_layer_identifier */
474 : Isibaar 1.1 {
475 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "+ is_object_layer_identifier\n");
476 :     vol_ver_id = BitstreamGetBits(bs, 4); /* video_object_layer_verid */
477 :     DPRINTF(XVID_DEBUG_HEADER,"ver_id %i\n", vol_ver_id);
478 :     BitstreamSkip(bs, 3); /* video_object_layer_priority */
479 : edgomez 1.14 } else {
480 : Isibaar 1.1 vol_ver_id = 1;
481 :     }
482 :    
483 : edgomez 1.38 dec->aspect_ratio = BitstreamGetBits(bs, 4);
484 :    
485 : edgomez 1.42 if (dec->aspect_ratio == VIDOBJLAY_AR_EXTPAR) /* aspect_ratio_info */
486 : Isibaar 1.1 {
487 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "+ aspect_ratio_info\n");
488 :     dec->par_width = BitstreamGetBits(bs, 8); /* par_width */
489 :     dec->par_height = BitstreamGetBits(bs, 8); /* par_height */
490 : Isibaar 1.1 }
491 :    
492 : edgomez 1.42 if (BitstreamGetBit(bs)) /* vol_control_parameters */
493 : Isibaar 1.1 {
494 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "+ vol_control_parameters\n");
495 :     BitstreamSkip(bs, 2); /* chroma_format */
496 :     dec->low_delay = BitstreamGetBit(bs); /* low_delay */
497 :     DPRINTF(XVID_DEBUG_HEADER, "low_delay %i\n", dec->low_delay);
498 :     if (BitstreamGetBit(bs)) /* vbv_parameters */
499 : Isibaar 1.1 {
500 : edgomez 1.38 unsigned int bitrate;
501 :     unsigned int buffer_size;
502 :     unsigned int occupancy;
503 :    
504 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER,"+ vbv_parameters\n");
505 : edgomez 1.38
506 : edgomez 1.42 bitrate = BitstreamGetBits(bs,15) << 15; /* first_half_bit_rate */
507 : Isibaar 1.1 READ_MARKER();
508 : edgomez 1.42 bitrate |= BitstreamGetBits(bs,15); /* latter_half_bit_rate */
509 : Isibaar 1.1 READ_MARKER();
510 : edgomez 1.42
511 :     buffer_size = BitstreamGetBits(bs, 15) << 3; /* first_half_vbv_buffer_size */
512 : Isibaar 1.1 READ_MARKER();
513 : edgomez 1.42 buffer_size |= BitstreamGetBits(bs, 3); /* latter_half_vbv_buffer_size */
514 : edgomez 1.38
515 : edgomez 1.42 occupancy = BitstreamGetBits(bs, 11) << 15; /* first_half_vbv_occupancy */
516 : Isibaar 1.1 READ_MARKER();
517 : edgomez 1.42 occupancy |= BitstreamGetBits(bs, 15); /* latter_half_vbv_occupancy */
518 : Isibaar 1.1 READ_MARKER();
519 : edgomez 1.14
520 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER,"bitrate %d (unit=400 bps)\n", bitrate);
521 :     DPRINTF(XVID_DEBUG_HEADER,"buffer_size %d (unit=16384 bits)\n", buffer_size);
522 :     DPRINTF(XVID_DEBUG_HEADER,"occupancy %d (unit=64 bits)\n", occupancy);
523 : Isibaar 1.1 }
524 : edgomez 1.38 }else{
525 :     dec->low_delay = dec->low_delay_default;
526 : Isibaar 1.1 }
527 :    
528 : edgomez 1.42 dec->shape = BitstreamGetBits(bs, 2); /* video_object_layer_shape */
529 : edgomez 1.38
530 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "shape %i\n", dec->shape);
531 : edgomez 1.38 if (dec->shape != VIDOBJLAY_SHAPE_RECTANGULAR)
532 :     {
533 : edgomez 1.42 DPRINTF(XVID_DEBUG_ERROR,"non-rectangular shapes are not supported\n");
534 : edgomez 1.38 }
535 : edgomez 1.14
536 :     if (dec->shape == VIDOBJLAY_SHAPE_GRAYSCALE && vol_ver_id != 1) {
537 : edgomez 1.42 BitstreamSkip(bs, 4); /* video_object_layer_shape_extension */
538 : Isibaar 1.1 }
539 :    
540 :     READ_MARKER();
541 :    
542 : edgomez 1.42 /********************** for decode B-frame time ***********************/
543 :     dec->time_inc_resolution = BitstreamGetBits(bs, 16); /* vop_time_increment_resolution */
544 :     DPRINTF(XVID_DEBUG_HEADER,"vop_time_increment_resolution %i\n", dec->time_inc_resolution);
545 : suxen_drol 1.22
546 : edgomez 1.42 #if 0
547 :     dec->time_inc_resolution--;
548 :     #endif
549 : suxen_drol 1.22
550 : edgomez 1.38 if (dec->time_inc_resolution > 0) {
551 : edgomez 1.44 dec->time_inc_bits = MAX(log2bin(dec->time_inc_resolution-1), 1);
552 : edgomez 1.14 } else {
553 : edgomez 1.42 #if 0
554 :     dec->time_inc_bits = 0;
555 :     #endif
556 :     /* for "old" xvid compatibility, set time_inc_bits = 1 */
557 : Isibaar 1.1 dec->time_inc_bits = 1;
558 :     }
559 :    
560 :     READ_MARKER();
561 :    
562 : edgomez 1.42 if (BitstreamGetBit(bs)) /* fixed_vop_rate */
563 : Isibaar 1.1 {
564 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "+ fixed_vop_rate\n");
565 :     BitstreamSkip(bs, dec->time_inc_bits); /* fixed_vop_time_increment */
566 : Isibaar 1.1 }
567 :    
568 : edgomez 1.14 if (dec->shape != VIDOBJLAY_SHAPE_BINARY_ONLY) {
569 : Isibaar 1.1
570 : edgomez 1.14 if (dec->shape == VIDOBJLAY_SHAPE_RECTANGULAR) {
571 : Isibaar 1.1 uint32_t width, height;
572 :    
573 :     READ_MARKER();
574 : edgomez 1.42 width = BitstreamGetBits(bs, 13); /* video_object_layer_width */
575 : Isibaar 1.1 READ_MARKER();
576 : edgomez 1.42 height = BitstreamGetBits(bs, 13); /* video_object_layer_height */
577 : Isibaar 1.1 READ_MARKER();
578 :    
579 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "width %i\n", width);
580 :     DPRINTF(XVID_DEBUG_HEADER, "height %i\n", height);
581 : chenm001 1.23
582 : edgomez 1.38 if (dec->width != width || dec->height != height)
583 :     {
584 :     if (dec->fixed_dimensions)
585 :     {
586 : edgomez 1.42 DPRINTF(XVID_DEBUG_ERROR, "decoder width/height does not match bitstream\n");
587 : edgomez 1.38 return -1;
588 :     }
589 :     resize = 1;
590 : chenm001 1.23 dec->width = width;
591 :     dec->height = height;
592 : Isibaar 1.1 }
593 :     }
594 : h 1.4
595 : suxen_drol 1.22 dec->interlacing = BitstreamGetBit(bs);
596 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "interlacing %i\n", dec->interlacing);
597 : Isibaar 1.1
598 : edgomez 1.42 if (!BitstreamGetBit(bs)) /* obmc_disable */
599 : Isibaar 1.1 {
600 : edgomez 1.42 DPRINTF(XVID_DEBUG_ERROR, "obmc_disabled==false not supported\n");
601 :     /* TODO */
602 :     /* fucking divx4.02 has this enabled */
603 : Isibaar 1.1 }
604 :    
605 : edgomez 1.42 dec->sprite_enable = BitstreamGetBits(bs, (vol_ver_id == 1 ? 1 : 2)); /* sprite_enable */
606 : edgomez 1.38
607 :     if (dec->sprite_enable == SPRITE_STATIC || dec->sprite_enable == SPRITE_GMC)
608 : Isibaar 1.1 {
609 : edgomez 1.38 int low_latency_sprite_enable;
610 :    
611 :     if (dec->sprite_enable != SPRITE_GMC)
612 :     {
613 :     int sprite_width;
614 :     int sprite_height;
615 :     int sprite_left_coord;
616 :     int sprite_top_coord;
617 : edgomez 1.42 sprite_width = BitstreamGetBits(bs, 13); /* sprite_width */
618 : edgomez 1.38 READ_MARKER();
619 : edgomez 1.42 sprite_height = BitstreamGetBits(bs, 13); /* sprite_height */
620 : edgomez 1.38 READ_MARKER();
621 : edgomez 1.42 sprite_left_coord = BitstreamGetBits(bs, 13); /* sprite_left_coordinate */
622 : edgomez 1.38 READ_MARKER();
623 : edgomez 1.42 sprite_top_coord = BitstreamGetBits(bs, 13); /* sprite_top_coordinate */
624 : edgomez 1.38 READ_MARKER();
625 :     }
626 : edgomez 1.42 dec->sprite_warping_points = BitstreamGetBits(bs, 6); /* no_of_sprite_warping_points */
627 :     dec->sprite_warping_accuracy = BitstreamGetBits(bs, 2); /* sprite_warping_accuracy */
628 :     dec->sprite_brightness_change = BitstreamGetBits(bs, 1); /* brightness_change */
629 : edgomez 1.38 if (dec->sprite_enable != SPRITE_GMC)
630 :     {
631 : edgomez 1.42 low_latency_sprite_enable = BitstreamGetBits(bs, 1); /* low_latency_sprite_enable */
632 : edgomez 1.38 }
633 : Isibaar 1.1 }
634 : edgomez 1.14
635 :     if (vol_ver_id != 1 &&
636 :     dec->shape != VIDOBJLAY_SHAPE_RECTANGULAR) {
637 : edgomez 1.42 BitstreamSkip(bs, 1); /* sadct_disable */
638 : Isibaar 1.1 }
639 :    
640 : edgomez 1.42 if (BitstreamGetBit(bs)) /* not_8_bit */
641 : Isibaar 1.1 {
642 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "not_8_bit==true (ignored)\n");
643 :     dec->quant_bits = BitstreamGetBits(bs, 4); /* quant_precision */
644 :     BitstreamSkip(bs, 4); /* bits_per_pixel */
645 : edgomez 1.14 } else {
646 : Isibaar 1.1 dec->quant_bits = 5;
647 :     }
648 :    
649 : edgomez 1.14 if (dec->shape == VIDOBJLAY_SHAPE_GRAYSCALE) {
650 : edgomez 1.42 BitstreamSkip(bs, 1); /* no_gray_quant_update */
651 :     BitstreamSkip(bs, 1); /* composition_method */
652 :     BitstreamSkip(bs, 1); /* linear_composition */
653 : Isibaar 1.1 }
654 :    
655 : edgomez 1.42 dec->quant_type = BitstreamGetBit(bs); /* quant_type */
656 :     DPRINTF(XVID_DEBUG_HEADER, "quant_type %i\n", dec->quant_type);
657 : Isibaar 1.1
658 : edgomez 1.14 if (dec->quant_type) {
659 : edgomez 1.42 if (BitstreamGetBit(bs)) /* load_intra_quant_mat */
660 : Isibaar 1.1 {
661 : Isibaar 1.3 uint8_t matrix[64];
662 : edgomez 1.14
663 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "load_intra_quant_mat\n");
664 : suxen_drol 1.22
665 : Isibaar 1.2 bs_get_matrix(bs, matrix);
666 : edgomez 1.42 set_intra_matrix(dec->mpeg_quant_matrices, matrix);
667 : edgomez 1.14 } else
668 : edgomez 1.42 set_intra_matrix(dec->mpeg_quant_matrices, get_default_intra_matrix());
669 : Isibaar 1.2
670 : edgomez 1.42 if (BitstreamGetBit(bs)) /* load_inter_quant_mat */
671 : Isibaar 1.1 {
672 : edgomez 1.14 uint8_t matrix[64];
673 : edgomez 1.42
674 :     DPRINTF(XVID_DEBUG_HEADER, "load_inter_quant_mat\n");
675 : edgomez 1.14
676 : Isibaar 1.2 bs_get_matrix(bs, matrix);
677 : edgomez 1.42 set_inter_matrix(dec->mpeg_quant_matrices, matrix);
678 : edgomez 1.14 } else
679 : edgomez 1.42 set_inter_matrix(dec->mpeg_quant_matrices, get_default_inter_matrix());
680 : Isibaar 1.1
681 : edgomez 1.14 if (dec->shape == VIDOBJLAY_SHAPE_GRAYSCALE) {
682 : edgomez 1.42 DPRINTF(XVID_DEBUG_ERROR, "greyscale matrix not supported\n");
683 : Isibaar 1.1 return -1;
684 :     }
685 : Isibaar 1.2
686 : Isibaar 1.1 }
687 :    
688 : edgomez 1.14
689 :     if (vol_ver_id != 1) {
690 : edgomez 1.42 dec->quarterpel = BitstreamGetBit(bs); /* quarter_sample */
691 :     DPRINTF(XVID_DEBUG_HEADER,"quarterpel %i\n", dec->quarterpel);
692 : Isibaar 1.26 }
693 :     else
694 : Isibaar 1.1 dec->quarterpel = 0;
695 : edgomez 1.42
696 : Isibaar 1.1
697 : edgomez 1.38 dec->complexity_estimation_disable = BitstreamGetBit(bs); /* complexity estimation disable */
698 :     if (!dec->complexity_estimation_disable)
699 : Isibaar 1.1 {
700 : edgomez 1.38 read_vol_complexity_estimation_header(bs, dec);
701 : Isibaar 1.1 }
702 :    
703 : edgomez 1.42 BitstreamSkip(bs, 1); /* resync_marker_disable */
704 : Isibaar 1.1
705 : edgomez 1.42 if (BitstreamGetBit(bs)) /* data_partitioned */
706 : Isibaar 1.1 {
707 : edgomez 1.42 DPRINTF(XVID_DEBUG_ERROR, "data_partitioned not supported\n");
708 :     BitstreamSkip(bs, 1); /* reversible_vlc */
709 : Isibaar 1.1 }
710 :    
711 : edgomez 1.14 if (vol_ver_id != 1) {
712 : edgomez 1.38 dec->newpred_enable = BitstreamGetBit(bs);
713 : edgomez 1.42 if (dec->newpred_enable) /* newpred_enable */
714 : Isibaar 1.1 {
715 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "+ newpred_enable\n");
716 :     BitstreamSkip(bs, 2); /* requested_upstream_message_type */
717 :     BitstreamSkip(bs, 1); /* newpred_segment_type */
718 : Isibaar 1.1 }
719 : edgomez 1.38 dec->reduced_resolution_enable = BitstreamGetBit(bs); /* reduced_resolution_vop_enable */
720 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "reduced_resolution_enable %i\n", dec->reduced_resolution_enable);
721 : edgomez 1.38 }
722 :     else
723 :     {
724 :     dec->newpred_enable = 0;
725 :     dec->reduced_resolution_enable = 0;
726 : Isibaar 1.1 }
727 : edgomez 1.14
728 : edgomez 1.38 dec->scalability = BitstreamGetBit(bs); /* scalability */
729 : edgomez 1.42 if (dec->scalability)
730 : Isibaar 1.1 {
731 : edgomez 1.42 DPRINTF(XVID_DEBUG_ERROR, "scalability not supported\n");
732 : edgomez 1.38 BitstreamSkip(bs, 1); /* hierarchy_type */
733 :     BitstreamSkip(bs, 4); /* ref_layer_id */
734 :     BitstreamSkip(bs, 1); /* ref_layer_sampling_direc */
735 :     BitstreamSkip(bs, 5); /* hor_sampling_factor_n */
736 :     BitstreamSkip(bs, 5); /* hor_sampling_factor_m */
737 :     BitstreamSkip(bs, 5); /* vert_sampling_factor_n */
738 :     BitstreamSkip(bs, 5); /* vert_sampling_factor_m */
739 :     BitstreamSkip(bs, 1); /* enhancement_type */
740 :     if(dec->shape == VIDOBJLAY_SHAPE_BINARY /* && hierarchy_type==0 */) {
741 :     BitstreamSkip(bs, 1); /* use_ref_shape */
742 :     BitstreamSkip(bs, 1); /* use_ref_texture */
743 :     BitstreamSkip(bs, 5); /* shape_hor_sampling_factor_n */
744 :     BitstreamSkip(bs, 5); /* shape_hor_sampling_factor_m */
745 :     BitstreamSkip(bs, 5); /* shape_vert_sampling_factor_n */
746 :     BitstreamSkip(bs, 5); /* shape_vert_sampling_factor_m */
747 :     }
748 : Isibaar 1.1 return -1;
749 :     }
750 : edgomez 1.42 } else /* dec->shape == BINARY_ONLY */
751 : Isibaar 1.1 {
752 : edgomez 1.14 if (vol_ver_id != 1) {
753 : edgomez 1.38 dec->scalability = BitstreamGetBit(bs); /* scalability */
754 : edgomez 1.42 if (dec->scalability)
755 : Isibaar 1.1 {
756 : edgomez 1.42 DPRINTF(XVID_DEBUG_ERROR, "scalability not supported\n");
757 : edgomez 1.38 BitstreamSkip(bs, 4); /* ref_layer_id */
758 :     BitstreamSkip(bs, 5); /* hor_sampling_factor_n */
759 :     BitstreamSkip(bs, 5); /* hor_sampling_factor_m */
760 :     BitstreamSkip(bs, 5); /* vert_sampling_factor_n */
761 :     BitstreamSkip(bs, 5); /* vert_sampling_factor_m */
762 : Isibaar 1.1 return -1;
763 :     }
764 :     }
765 : edgomez 1.42 BitstreamSkip(bs, 1); /* resync_marker_disable */
766 : Isibaar 1.1
767 :     }
768 :    
769 : edgomez 1.38 return (resize ? -3 : -2 ); /* VOL */
770 :    
771 : edgomez 1.14 } else if (start_code == GRPOFVOP_START_CODE) {
772 : suxen_drol 1.22
773 : edgomez 1.42 DPRINTF(XVID_DEBUG_STARTCODE, "<group_of_vop>\n");
774 : suxen_drol 1.22
775 : Isibaar 1.1 BitstreamSkip(bs, 32);
776 :     {
777 :     int hours, minutes, seconds;
778 : edgomez 1.14
779 : Isibaar 1.1 hours = BitstreamGetBits(bs, 5);
780 :     minutes = BitstreamGetBits(bs, 6);
781 :     READ_MARKER();
782 :     seconds = BitstreamGetBits(bs, 6);
783 : edgomez 1.42
784 :     DPRINTF(XVID_DEBUG_HEADER, "time %ih%im%is\n", hours,minutes,seconds);
785 : Isibaar 1.1 }
786 : edgomez 1.42 BitstreamSkip(bs, 1); /* closed_gov */
787 :     BitstreamSkip(bs, 1); /* broken_link */
788 : suxen_drol 1.22
789 : edgomez 1.14 } else if (start_code == VOP_START_CODE) {
790 : suxen_drol 1.22
791 : edgomez 1.42 DPRINTF(XVID_DEBUG_STARTCODE, "<vop>\n");
792 : suxen_drol 1.22
793 : edgomez 1.42 BitstreamSkip(bs, 32); /* vop_start_code */
794 : Isibaar 1.1
795 : edgomez 1.42 coding_type = BitstreamGetBits(bs, 2); /* vop_coding_type */
796 :     DPRINTF(XVID_DEBUG_HEADER, "coding_type %i\n", coding_type);
797 : Isibaar 1.1
798 : edgomez 1.42 /*********************** for decode B-frame time ***********************/
799 :     while (BitstreamGetBit(bs) != 0) /* time_base */
800 : chenm001 1.9 time_incr++;
801 : edgomez 1.14
802 : Isibaar 1.1 READ_MARKER();
803 : edgomez 1.14
804 :     if (dec->time_inc_bits) {
805 : edgomez 1.42 time_increment = (BitstreamGetBits(bs, dec->time_inc_bits)); /* vop_time_increment */
806 : chenm001 1.9 }
807 : suxen_drol 1.19
808 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "time_base %i\n", time_incr);
809 :     DPRINTF(XVID_DEBUG_HEADER, "time_increment %i\n", time_increment);
810 : suxen_drol 1.22
811 : edgomez 1.42 DPRINTF(XVID_DEBUG_TIMECODE, "%c %i:%i\n",
812 : edgomez 1.38 coding_type == I_VOP ? 'I' : coding_type == P_VOP ? 'P' : coding_type == B_VOP ? 'B' : 'S',
813 : suxen_drol 1.19 time_incr, time_increment);
814 :    
815 : edgomez 1.14 if (coding_type != B_VOP) {
816 :     dec->last_time_base = dec->time_base;
817 : chenm001 1.9 dec->time_base += time_incr;
818 : edgomez 1.44 dec->time = dec->time_base*dec->time_inc_resolution + time_increment;
819 :     dec->time_pp = (int32_t)(dec->time - dec->last_non_b_time);
820 : edgomez 1.14 dec->last_non_b_time = dec->time;
821 :     } else {
822 : edgomez 1.44 dec->time = (dec->last_time_base + time_incr)*dec->time_inc_resolution + time_increment;
823 :     dec->time_bp = dec->time_pp - (int32_t)(dec->last_non_b_time - dec->time);
824 : Isibaar 1.1 }
825 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER,"time_pp=%i\n", dec->time_pp);
826 :     DPRINTF(XVID_DEBUG_HEADER,"time_bp=%i\n", dec->time_bp);
827 : Isibaar 1.1
828 :     READ_MARKER();
829 :    
830 : edgomez 1.42 if (!BitstreamGetBit(bs)) /* vop_coded */
831 : Isibaar 1.1 {
832 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "vop_coded==false\n");
833 : Isibaar 1.1 return N_VOP;
834 :     }
835 :    
836 : edgomez 1.38 if (dec->newpred_enable)
837 :     {
838 :     int vop_id;
839 :     int vop_id_for_prediction;
840 : edgomez 1.42
841 : edgomez 1.38 vop_id = BitstreamGetBits(bs, MIN(dec->time_inc_bits + 3, 15));
842 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "vop_id %i\n", vop_id);
843 : edgomez 1.38 if (BitstreamGetBit(bs)) /* vop_id_for_prediction_indication */
844 :     {
845 :     vop_id_for_prediction = BitstreamGetBits(bs, MIN(dec->time_inc_bits + 3, 15));
846 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "vop_id_for_prediction %i\n", vop_id_for_prediction);
847 : edgomez 1.38 }
848 :     READ_MARKER();
849 :     }
850 :    
851 : Isibaar 1.1
852 : edgomez 1.42
853 :     /* fix a little bug by MinChen <chenm002@163.com> */
854 : edgomez 1.14 if ((dec->shape != VIDOBJLAY_SHAPE_BINARY_ONLY) &&
855 : edgomez 1.38 ( (coding_type == P_VOP) || (coding_type == S_VOP && dec->sprite_enable == SPRITE_GMC) ) ) {
856 : edgomez 1.42 *rounding = BitstreamGetBit(bs); /* rounding_type */
857 :     DPRINTF(XVID_DEBUG_HEADER, "rounding %i\n", *rounding);
858 : Isibaar 1.1 }
859 :    
860 : edgomez 1.38 if (dec->reduced_resolution_enable &&
861 :     dec->shape == VIDOBJLAY_SHAPE_RECTANGULAR &&
862 :     (coding_type == P_VOP || coding_type == I_VOP)) {
863 :    
864 : syskin 1.48 if (BitstreamGetBit(bs));
865 :     DPRINTF(XVID_DEBUG_ERROR, "RRV not supported (anymore)\n");
866 : edgomez 1.38 }
867 : Isibaar 1.1
868 : edgomez 1.14 if (dec->shape != VIDOBJLAY_SHAPE_RECTANGULAR) {
869 : edgomez 1.38 if(!(dec->sprite_enable == SPRITE_STATIC && coding_type == I_VOP)) {
870 : edgomez 1.14
871 : edgomez 1.38 uint32_t width, height;
872 :     uint32_t horiz_mc_ref, vert_mc_ref;
873 : Isibaar 1.1
874 : edgomez 1.38 width = BitstreamGetBits(bs, 13);
875 :     READ_MARKER();
876 :     height = BitstreamGetBits(bs, 13);
877 :     READ_MARKER();
878 :     horiz_mc_ref = BitstreamGetBits(bs, 13);
879 :     READ_MARKER();
880 :     vert_mc_ref = BitstreamGetBits(bs, 13);
881 :     READ_MARKER();
882 : Isibaar 1.1
883 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "width %i\n", width);
884 :     DPRINTF(XVID_DEBUG_HEADER, "height %i\n", height);
885 :     DPRINTF(XVID_DEBUG_HEADER, "horiz_mc_ref %i\n", horiz_mc_ref);
886 :     DPRINTF(XVID_DEBUG_HEADER, "vert_mc_ref %i\n", vert_mc_ref);
887 : edgomez 1.38 }
888 :    
889 : edgomez 1.42 BitstreamSkip(bs, 1); /* change_conv_ratio_disable */
890 :     if (BitstreamGetBit(bs)) /* vop_constant_alpha */
891 : Isibaar 1.1 {
892 : edgomez 1.42 BitstreamSkip(bs, 8); /* vop_constant_alpha_value */
893 : Isibaar 1.1 }
894 :     }
895 :    
896 : edgomez 1.38 if (dec->shape != VIDOBJLAY_SHAPE_BINARY_ONLY) {
897 : edgomez 1.14
898 : edgomez 1.38 if (!dec->complexity_estimation_disable)
899 :     {
900 :     read_vop_complexity_estimation_header(bs, dec, coding_type);
901 :     }
902 :    
903 : edgomez 1.42 /* intra_dc_vlc_threshold */
904 : edgomez 1.14 *intra_dc_threshold =
905 :     intra_dc_threshold_table[BitstreamGetBits(bs, 3)];
906 : Isibaar 1.1
907 : edgomez 1.38 dec->top_field_first = 0;
908 :     dec->alternate_vertical_scan = 0;
909 :    
910 : edgomez 1.14 if (dec->interlacing) {
911 : suxen_drol 1.22 dec->top_field_first = BitstreamGetBit(bs);
912 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "interlace top_field_first %i\n", dec->top_field_first);
913 : suxen_drol 1.22 dec->alternate_vertical_scan = BitstreamGetBit(bs);
914 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "interlace alternate_vertical_scan %i\n", dec->alternate_vertical_scan);
915 :    
916 : h 1.4 }
917 : Isibaar 1.1 }
918 : edgomez 1.14
919 : edgomez 1.38 if ((dec->sprite_enable == SPRITE_STATIC || dec->sprite_enable== SPRITE_GMC) && coding_type == S_VOP) {
920 :    
921 :     int i;
922 :    
923 :     for (i = 0 ; i < dec->sprite_warping_points; i++)
924 :     {
925 :     int length;
926 :     int x = 0, y = 0;
927 :    
928 :     /* sprite code borowed from ffmpeg; thx Michael Niedermayer <michaelni@gmx.at> */
929 :     length = bs_get_spritetrajectory(bs);
930 :     if(length){
931 :     x= BitstreamGetBits(bs, length);
932 :     if ((x >> (length - 1)) == 0) /* if MSB not set it is negative*/
933 :     x = - (x ^ ((1 << length) - 1));
934 :     }
935 :     READ_MARKER();
936 : edgomez 1.42
937 : edgomez 1.38 length = bs_get_spritetrajectory(bs);
938 :     if(length){
939 :     y = BitstreamGetBits(bs, length);
940 :     if ((y >> (length - 1)) == 0) /* if MSB not set it is negative*/
941 :     y = - (y ^ ((1 << length) - 1));
942 :     }
943 :     READ_MARKER();
944 :    
945 :     gmc_warp->duv[i].x = x;
946 :     gmc_warp->duv[i].y = y;
947 :    
948 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER,"sprite_warping_point[%i] xy=(%i,%i)\n", i, x, y);
949 : edgomez 1.38 }
950 :    
951 :     if (dec->sprite_brightness_change)
952 :     {
953 : edgomez 1.42 /* XXX: brightness_change_factor() */
954 : edgomez 1.38 }
955 :     if (dec->sprite_enable == SPRITE_STATIC)
956 :     {
957 : edgomez 1.42 /* XXX: todo */
958 : edgomez 1.38 }
959 :    
960 :     }
961 :    
962 : edgomez 1.42 if ((*quant = BitstreamGetBits(bs, dec->quant_bits)) < 1) /* vop_quant */
963 : Isibaar 1.10 *quant = 1;
964 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "quant %i\n", *quant);
965 : edgomez 1.14
966 :     if (coding_type != I_VOP) {
967 : edgomez 1.42 *fcode_forward = BitstreamGetBits(bs, 3); /* fcode_forward */
968 :     DPRINTF(XVID_DEBUG_HEADER, "fcode_forward %i\n", *fcode_forward);
969 : Isibaar 1.1 }
970 : edgomez 1.14
971 :     if (coding_type == B_VOP) {
972 : edgomez 1.42 *fcode_backward = BitstreamGetBits(bs, 3); /* fcode_backward */
973 :     DPRINTF(XVID_DEBUG_HEADER, "fcode_backward %i\n", *fcode_backward);
974 : chenm001 1.9 }
975 : edgomez 1.14 if (!dec->scalability) {
976 :     if ((dec->shape != VIDOBJLAY_SHAPE_RECTANGULAR) &&
977 :     (coding_type != I_VOP)) {
978 : edgomez 1.42 BitstreamSkip(bs, 1); /* vop_shape_coding_type */
979 : chenm001 1.9 }
980 : Isibaar 1.1 }
981 :     return coding_type;
982 : suxen_drol 1.22
983 : edgomez 1.14 } else if (start_code == USERDATA_START_CODE) {
984 : edgomez 1.38 char tmp[256];
985 :     int i, version, build;
986 :     char packed;
987 :    
988 : edgomez 1.42 BitstreamSkip(bs, 32); /* user_data_start_code */
989 : edgomez 1.38
990 : edgomez 1.46 memset(tmp, 0, 256);
991 : edgomez 1.38 tmp[0] = BitstreamShowBits(bs, 8);
992 : edgomez 1.42
993 : edgomez 1.38 for(i = 1; i < 256; i++){
994 :     tmp[i] = (BitstreamShowBits(bs, 16) & 0xFF);
995 : edgomez 1.42
996 :     if(tmp[i] == 0)
997 : edgomez 1.38 break;
998 : edgomez 1.42
999 : edgomez 1.38 BitstreamSkip(bs, 8);
1000 :     }
1001 : suxen_drol 1.22
1002 : edgomez 1.42 DPRINTF(XVID_DEBUG_STARTCODE, "<user_data>: %s\n", tmp);
1003 :    
1004 : Isibaar 1.40 /* read xvid bitstream version */
1005 :     if(strncmp(tmp, "XviD", 4) == 0) {
1006 : edgomez 1.42 if (tmp[strlen(tmp)-1] == 'C') {
1007 :     sscanf(tmp, "XviD%dC", &dec->bs_version);
1008 :     dec->cartoon_mode = 1;
1009 :     }
1010 :     else
1011 :     sscanf(tmp, "XviD%d", &dec->bs_version);
1012 :    
1013 : edgomez 1.44 DPRINTF(XVID_DEBUG_HEADER, "xvid bitstream version=%i\n", dec->bs_version);
1014 : Isibaar 1.40 }
1015 : suxen_drol 1.22
1016 : edgomez 1.38 /* divx detection */
1017 :     i = sscanf(tmp, "DivX%dBuild%d%c", &version, &build, &packed);
1018 :     if (i < 2)
1019 :     i = sscanf(tmp, "DivX%db%d%c", &version, &build, &packed);
1020 : edgomez 1.42
1021 : edgomez 1.38 if (i >= 2)
1022 :     {
1023 :     dec->packed_mode = (i == 3 && packed == 'p');
1024 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "divx version=%i, build=%i packed=%i\n",
1025 : edgomez 1.38 version, build, dec->packed_mode);
1026 :     }
1027 : suxen_drol 1.22
1028 : edgomez 1.42 } else /* start_code == ? */
1029 : Isibaar 1.1 {
1030 : edgomez 1.14 if (BitstreamShowBits(bs, 24) == 0x000001) {
1031 : edgomez 1.42 DPRINTF(XVID_DEBUG_STARTCODE, "<unknown: %x>\n", BitstreamShowBits(bs, 32));
1032 : Isibaar 1.1 }
1033 :     BitstreamSkip(bs, 8);
1034 :     }
1035 :     }
1036 :    
1037 : edgomez 1.42 #if 0
1038 :     DPRINTF("*** WARNING: no vop_start_code found");
1039 :     #endif
1040 : edgomez 1.14 return -1; /* ignore it */
1041 : Isibaar 1.1 }
1042 :    
1043 :    
1044 :     /* write custom quant matrix */
1045 :    
1046 : edgomez 1.14 static void
1047 :     bs_put_matrix(Bitstream * bs,
1048 : edgomez 1.42 const uint16_t * matrix)
1049 : Isibaar 1.1 {
1050 :     int i, j;
1051 :     const int last = matrix[scan_tables[0][63]];
1052 :    
1053 : suxen_drol 1.18 for (j = 63; j > 0 && matrix[scan_tables[0][j - 1]] == last; j--);
1054 : Isibaar 1.1
1055 : edgomez 1.14 for (i = 0; i <= j; i++) {
1056 : Isibaar 1.1 BitstreamPutBits(bs, matrix[scan_tables[0][i]], 8);
1057 :     }
1058 :    
1059 : edgomez 1.14 if (j < 63) {
1060 : Isibaar 1.1 BitstreamPutBits(bs, 0, 8);
1061 :     }
1062 :     }
1063 :    
1064 :    
1065 :     /*
1066 :     write vol header
1067 :     */
1068 : edgomez 1.14 void
1069 :     BitstreamWriteVolHeader(Bitstream * const bs,
1070 :     const MBParam * pParam,
1071 : edgomez 1.38 const FRAMEINFO * const frame)
1072 : Isibaar 1.1 {
1073 : edgomez 1.38 static const unsigned int vo_id = 0;
1074 :     static const unsigned int vol_id = 0;
1075 : edgomez 1.42 int vol_ver_id = 1;
1076 :     int vol_type_ind = VIDOBJLAY_TYPE_SIMPLE;
1077 :     int vol_profile = pParam->profile;
1078 :    
1079 :     if ( (pParam->vol_flags & XVID_VOL_QUARTERPEL) ||
1080 :     (pParam->vol_flags & XVID_VOL_GMC) ||
1081 :     (pParam->vol_flags & XVID_VOL_REDUCED_ENABLE))
1082 : edgomez 1.38 vol_ver_id = 2;
1083 :    
1084 : edgomez 1.42 if ((pParam->vol_flags & XVID_VOL_REDUCED_ENABLE)) {
1085 :     vol_type_ind = VIDOBJLAY_TYPE_ART_SIMPLE;
1086 :     }
1087 :    
1088 : suxen_drol 1.50 if ((pParam->vol_flags & (XVID_VOL_MPEGQUANT|XVID_VOL_QUARTERPEL|XVID_VOL_GMC|XVID_VOL_INTERLACING)) ||
1089 :     pParam->max_bframes>0) {
1090 : edgomez 1.42 vol_type_ind = VIDOBJLAY_TYPE_ASP;
1091 :     }
1092 : edgomez 1.38
1093 : edgomez 1.42 /* visual_object_sequence_start_code */
1094 :     #if 0
1095 :     BitstreamPad(bs);
1096 :     #endif
1097 : edgomez 1.38
1098 : edgomez 1.42 /*
1099 :     * no padding here, anymore. You have to make sure that you are
1100 :     * byte aligned, and that always 1-8 padding bits have been written
1101 :     */
1102 : edgomez 1.38
1103 : edgomez 1.42 if (!vol_profile) {
1104 :     /* Profile was not set by client app, use the more permissive profile
1105 :     * compatible with the vol_type_id */
1106 :     switch(vol_type_ind) {
1107 :     case VIDOBJLAY_TYPE_ASP:
1108 :     vol_profile = 0xf5; /* ASP level 5 */
1109 :     break;
1110 :     case VIDOBJLAY_TYPE_ART_SIMPLE:
1111 :     vol_profile = 0x94; /* ARTS level 4 */
1112 :     break;
1113 :     default:
1114 :     vol_profile = 0x03; /* Simple level 3 */
1115 :     break;
1116 :     }
1117 :     }
1118 :    
1119 :     /* Write the VOS header */
1120 : edgomez 1.38 BitstreamPutBits(bs, VISOBJSEQ_START_CODE, 32);
1121 : edgomez 1.42 BitstreamPutBits(bs, vol_profile, 8); /* profile_and_level_indication */
1122 : edgomez 1.38
1123 : edgomez 1.42
1124 :     /* visual_object_start_code */
1125 : edgomez 1.38 BitstreamPad(bs);
1126 :     BitstreamPutBits(bs, VISOBJ_START_CODE, 32);
1127 : edgomez 1.42 BitstreamPutBits(bs, 0, 1); /* is_visual_object_identifier */
1128 : edgomez 1.41
1129 :     /* Video type */
1130 : edgomez 1.42 BitstreamPutBits(bs, VISOBJ_TYPE_VIDEO, 4); /* visual_object_type */
1131 : edgomez 1.41 BitstreamPutBit(bs, 0); /* video_signal_type */
1132 :    
1133 : edgomez 1.42 /* video object_start_code & vo_id */
1134 :     BitstreamPadAlways(bs); /* next_start_code() */
1135 : edgomez 1.38 BitstreamPutBits(bs, VIDOBJ_START_CODE|(vo_id&0x5), 32);
1136 : Isibaar 1.1
1137 : edgomez 1.42 /* video_object_layer_start_code & vol_id */
1138 : edgomez 1.38 BitstreamPad(bs);
1139 :     BitstreamPutBits(bs, VIDOBJLAY_START_CODE|(vol_id&0x4), 32);
1140 : Isibaar 1.1
1141 : edgomez 1.42 BitstreamPutBit(bs, 0); /* random_accessible_vol */
1142 :     BitstreamPutBits(bs, vol_type_ind, 8); /* video_object_type_indication */
1143 : suxen_drol 1.12
1144 : edgomez 1.42 if (vol_ver_id == 1) {
1145 :     BitstreamPutBit(bs, 0); /* is_object_layer_identified (0=not given) */
1146 :     } else {
1147 :     BitstreamPutBit(bs, 1); /* is_object_layer_identified */
1148 :     BitstreamPutBits(bs, vol_ver_id, 4); /* vol_ver_id == 2 */
1149 :     BitstreamPutBits(bs, 4, 3); /* vol_ver_priority (1==highest, 7==lowest) */
1150 :     }
1151 :    
1152 :     /* Aspect ratio */
1153 :     BitstreamPutBits(bs, pParam->par, 4); /* aspect_ratio_info (1=1:1) */
1154 :     if(pParam->par == XVID_PAR_EXT) {
1155 :     BitstreamPutBits(bs, pParam->par_width, 8);
1156 :     BitstreamPutBits(bs, pParam->par_height, 8);
1157 : edgomez 1.38 }
1158 : chl 1.28
1159 : edgomez 1.42 BitstreamPutBit(bs, 1); /* vol_control_parameters */
1160 :     BitstreamPutBits(bs, 1, 2); /* chroma_format 1="4:2:0" */
1161 : suxen_drol 1.12
1162 : edgomez 1.38 if (pParam->max_bframes > 0) {
1163 : edgomez 1.42 BitstreamPutBit(bs, 0); /* low_delay */
1164 : edgomez 1.38 } else
1165 :     {
1166 : edgomez 1.42 BitstreamPutBit(bs, 1); /* low_delay */
1167 : edgomez 1.38 }
1168 : edgomez 1.42 BitstreamPutBit(bs, 0); /* vbv_parameters (0=not given) */
1169 : edgomez 1.38
1170 : edgomez 1.42 BitstreamPutBits(bs, 0, 2); /* video_object_layer_shape (0=rectangular) */
1171 : Isibaar 1.1
1172 :     WRITE_MARKER();
1173 : edgomez 1.14
1174 : edgomez 1.42 /*
1175 :     * time_inc_resolution; ignored by current decore versions
1176 :     * eg. 2fps res=2 inc=1
1177 :     * 25fps res=25 inc=1
1178 :     * 29.97fps res=30000 inc=1001
1179 : edgomez 1.14 */
1180 : suxen_drol 1.11 BitstreamPutBits(bs, pParam->fbase, 16);
1181 : edgomez 1.31
1182 : Isibaar 1.1 WRITE_MARKER();
1183 :    
1184 : edgomez 1.42 if (pParam->fincr>0) {
1185 : edgomez 1.43 BitstreamPutBit(bs, 1); /* fixed_vop_rate = 1 */
1186 :     BitstreamPutBits(bs, pParam->fincr, MAX(log2bin(pParam->fbase-1),1)); /* fixed_vop_time_increment */
1187 : edgomez 1.42 }else{
1188 :     BitstreamPutBit(bs, 0); /* fixed_vop_rate = 0 */
1189 :     }
1190 : Isibaar 1.1
1191 :     WRITE_MARKER();
1192 : edgomez 1.42 BitstreamPutBits(bs, pParam->width, 13); /* width */
1193 : Isibaar 1.1 WRITE_MARKER();
1194 : edgomez 1.42 BitstreamPutBits(bs, pParam->height, 13); /* height */
1195 : Isibaar 1.1 WRITE_MARKER();
1196 : edgomez 1.14
1197 : edgomez 1.42 BitstreamPutBit(bs, pParam->vol_flags & XVID_VOL_INTERLACING); /* interlace */
1198 :     BitstreamPutBit(bs, 1); /* obmc_disable (overlapped block motion compensation) */
1199 : edgomez 1.38
1200 : edgomez 1.42 if (vol_ver_id != 1)
1201 :     { if ((pParam->vol_flags & XVID_VOL_GMC))
1202 :     { BitstreamPutBits(bs, 2, 2); /* sprite_enable=='GMC' */
1203 :     BitstreamPutBits(bs, 3, 6); /* no_of_sprite_warping_points */
1204 :     BitstreamPutBits(bs, 3, 2); /* sprite_warping_accuracy 0==1/2, 1=1/4, 2=1/8, 3=1/16 */
1205 :     BitstreamPutBit(bs, 0); /* sprite_brightness_change (not supported) */
1206 :    
1207 :     /*
1208 :     * currently we use no_of_sprite_warping_points==2, sprite_warping_accuracy==3
1209 :     * for DivX5 compatability
1210 :     */
1211 : edgomez 1.38
1212 :     } else
1213 : edgomez 1.42 BitstreamPutBits(bs, 0, 2); /* sprite_enable==off */
1214 : edgomez 1.38 }
1215 :     else
1216 : edgomez 1.42 BitstreamPutBit(bs, 0); /* sprite_enable==off */
1217 : edgomez 1.38
1218 : edgomez 1.42 BitstreamPutBit(bs, 0); /* not_8_bit */
1219 : Isibaar 1.1
1220 : edgomez 1.42 /* quant_type 0=h.263 1=mpeg4(quantizer tables) */
1221 :     BitstreamPutBit(bs, pParam->vol_flags & XVID_VOL_MPEGQUANT);
1222 : edgomez 1.14
1223 : edgomez 1.42 if ((pParam->vol_flags & XVID_VOL_MPEGQUANT)) {
1224 :     BitstreamPutBit(bs, is_custom_intra_matrix(pParam->mpeg_quant_matrices)); /* load_intra_quant_mat */
1225 :     if(is_custom_intra_matrix(pParam->mpeg_quant_matrices))
1226 :     bs_put_matrix(bs, get_intra_matrix(pParam->mpeg_quant_matrices));
1227 : Isibaar 1.1
1228 : edgomez 1.42 BitstreamPutBit(bs, is_custom_inter_matrix(pParam->mpeg_quant_matrices)); /* load_inter_quant_mat */
1229 :     if(is_custom_inter_matrix(pParam->mpeg_quant_matrices))
1230 :     bs_put_matrix(bs, get_inter_matrix(pParam->mpeg_quant_matrices));
1231 : Isibaar 1.1 }
1232 :    
1233 : edgomez 1.38 if (vol_ver_id != 1) {
1234 : edgomez 1.42 if ((pParam->vol_flags & XVID_VOL_QUARTERPEL))
1235 :     BitstreamPutBit(bs, 1); /* quarterpel */
1236 : edgomez 1.38 else
1237 : edgomez 1.42 BitstreamPutBit(bs, 0); /* no quarterpel */
1238 : edgomez 1.38 }
1239 :    
1240 : edgomez 1.42 BitstreamPutBit(bs, 1); /* complexity_estimation_disable */
1241 :     BitstreamPutBit(bs, 1); /* resync_marker_disable */
1242 :     BitstreamPutBit(bs, 0); /* data_partitioned */
1243 : edgomez 1.38
1244 : edgomez 1.42 if (vol_ver_id != 1) {
1245 :     BitstreamPutBit(bs, 0); /* newpred_enable */
1246 :     BitstreamPutBit(bs, (pParam->vol_flags & XVID_VOL_REDUCED_ENABLE)?1:0);
1247 : edgomez 1.38 /* reduced_resolution_vop_enabled */
1248 :     }
1249 :    
1250 : edgomez 1.42 BitstreamPutBit(bs, 0); /* scalability */
1251 :    
1252 :     BitstreamPadAlways(bs); /* next_start_code(); */
1253 : edgomez 1.41
1254 : suxen_drol 1.49 /* divx5 userdata string */
1255 :     #define DIVX5_ID "DivX503b1393"
1256 :     if ((pParam->global_flags & XVID_GLOBAL_DIVX5_USERDATA)) {
1257 :     BitstreamWriteUserData(bs, DIVX5_ID, strlen(DIVX5_ID));
1258 :     if (pParam->max_bframes > 0 && (pParam->global_flags & XVID_GLOBAL_PACKED))
1259 :     BitstreamPutBits(bs, 'p', 8);
1260 : edgomez 1.38 }
1261 :    
1262 :     /* xvid id */
1263 : edgomez 1.42 {
1264 : edgomez 1.43 const char xvid_user_format[] = "XviD%04d%c";
1265 :     char xvid_user_data[100];
1266 :     sprintf(xvid_user_data,
1267 :     xvid_user_format,
1268 :     XVID_BS_VERSION,
1269 :     (frame->vop_flags & XVID_VOP_CARTOON)?'C':'\0');
1270 :     BitstreamWriteUserData(bs, xvid_user_data, strlen(xvid_user_data));
1271 : edgomez 1.42 }
1272 : Isibaar 1.1 }
1273 :    
1274 :    
1275 :     /*
1276 :     write vop header
1277 :     */
1278 : edgomez 1.14 void
1279 : edgomez 1.38 BitstreamWriteVopHeader(
1280 :     Bitstream * const bs,
1281 : edgomez 1.14 const MBParam * pParam,
1282 : edgomez 1.38 const FRAMEINFO * const frame,
1283 : edgomez 1.42 int vop_coded,
1284 :     unsigned int quant)
1285 : Isibaar 1.1 {
1286 : suxen_drol 1.8 uint32_t i;
1287 : chl 1.28
1288 : edgomez 1.42 #if 0
1289 :     BitstreamPad(bs);
1290 :     #endif
1291 :    
1292 :     /*
1293 :     * no padding here, anymore. You have to make sure that you are
1294 :     * byte aligned, and that always 1-8 padding bits have been written
1295 :     */
1296 : edgomez 1.38
1297 : edgomez 1.14 BitstreamPutBits(bs, VOP_START_CODE, 32);
1298 :    
1299 :     BitstreamPutBits(bs, frame->coding_type, 2);
1300 : edgomez 1.42 #if 0
1301 :     DPRINTF(XVID_DEBUG_HEADER, "coding_type = %i\n", frame->coding_type);
1302 :     #endif
1303 : Isibaar 1.1
1304 : chl 1.28 for (i = 0; i < frame->seconds; i++) {
1305 :     BitstreamPutBit(bs, 1);
1306 :     }
1307 :     BitstreamPutBit(bs, 0);
1308 : Isibaar 1.1
1309 :     WRITE_MARKER();
1310 :    
1311 : edgomez 1.42 /* time_increment: value=nth_of_sec, nbits = log2(resolution) */
1312 : edgomez 1.43 BitstreamPutBits(bs, frame->ticks, MAX(log2bin(pParam->fbase-1), 1));
1313 : edgomez 1.42 #if 0
1314 :     DPRINTF("[%i:%i] %c",
1315 :     frame->seconds, frame->ticks,
1316 :     frame->coding_type == I_VOP ? 'I' :
1317 :     frame->coding_type == P_VOP ? 'P' :
1318 :     frame->coding_type == S_VOP ? 'S' : 'B');
1319 :     #endif
1320 : Isibaar 1.1
1321 :     WRITE_MARKER();
1322 :    
1323 : suxen_drol 1.17 if (!vop_coded) {
1324 :     BitstreamPutBits(bs, 0, 1);
1325 : edgomez 1.41 #if 0
1326 :     BitstreamPadAlways(bs); /* next_start_code() */
1327 :     #endif
1328 :     /* NB: It's up to the function caller to write the next_start_code().
1329 :     * At the moment encoder.c respects that requisite because a VOP
1330 :     * always ends with a next_start_code either if it's coded or not
1331 :     * and encoder.c terminates a frame with a next_start_code in whatever
1332 :     * case */
1333 : suxen_drol 1.17 return;
1334 :     }
1335 :    
1336 : edgomez 1.42 BitstreamPutBits(bs, 1, 1); /* vop_coded */
1337 : Isibaar 1.1
1338 : edgomez 1.38 if ( (frame->coding_type == P_VOP) || (frame->coding_type == S_VOP) )
1339 : suxen_drol 1.7 BitstreamPutBits(bs, frame->rounding_type, 1);
1340 : Isibaar 1.1
1341 : edgomez 1.42 if ((frame->vol_flags & XVID_VOL_REDUCED_ENABLE))
1342 : syskin 1.48 BitstreamPutBit(bs, 0);
1343 : edgomez 1.38
1344 : edgomez 1.42 BitstreamPutBits(bs, 0, 3); /* intra_dc_vlc_threshold */
1345 : edgomez 1.14
1346 : edgomez 1.42 if ((frame->vol_flags & XVID_VOL_INTERLACING)) {
1347 :     BitstreamPutBit(bs, (frame->vop_flags & XVID_VOP_TOPFIELDFIRST));
1348 :     BitstreamPutBit(bs, (frame->vop_flags & XVID_VOP_ALTERNATESCAN));
1349 : edgomez 1.38 }
1350 : edgomez 1.42
1351 : edgomez 1.38 if (frame->coding_type == S_VOP) {
1352 : edgomez 1.42 if (1) { /* no_of_sprite_warping_points>=1 (we use 2!) */
1353 : edgomez 1.38 int k;
1354 : edgomez 1.42 for (k=0;k<3;k++)
1355 : edgomez 1.38 {
1356 : edgomez 1.42 bs_put_spritetrajectory(bs, frame->warp.duv[k].x ); /* du[k] */
1357 : edgomez 1.38 WRITE_MARKER();
1358 : edgomez 1.42
1359 :     bs_put_spritetrajectory(bs, frame->warp.duv[k].y ); /* dv[k] */
1360 : edgomez 1.38 WRITE_MARKER();
1361 :    
1362 : edgomez 1.42 if ((frame->vol_flags & XVID_VOL_QUARTERPEL))
1363 : edgomez 1.38 {
1364 : 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);
1365 : edgomez 1.38 }
1366 :     else
1367 :     {
1368 : 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);
1369 : edgomez 1.38 }
1370 :     }
1371 :     }
1372 : h 1.4 }
1373 :    
1374 : edgomez 1.38
1375 : edgomez 1.42 #if 0
1376 :     DPRINTF(XVID_DEBUG_HEADER, "quant = %i\n", quant);
1377 :     #endif
1378 :    
1379 :     BitstreamPutBits(bs, quant, 5); /* quantizer */
1380 : edgomez 1.14
1381 : suxen_drol 1.7 if (frame->coding_type != I_VOP)
1382 : edgomez 1.42 BitstreamPutBits(bs, frame->fcode, 3); /* forward_fixed_code */
1383 : suxen_drol 1.8
1384 :     if (frame->coding_type == B_VOP)
1385 : edgomez 1.42 BitstreamPutBits(bs, frame->bcode, 3); /* backward_fixed_code */
1386 : edgomez 1.38
1387 :     }
1388 :    
1389 : edgomez 1.42 void
1390 :     BitstreamWriteUserData(Bitstream * const bs,
1391 :     uint8_t * data,
1392 : edgomez 1.38 const int length)
1393 :     {
1394 :     int i;
1395 :    
1396 :     BitstreamPad(bs);
1397 :     BitstreamPutBits(bs, USERDATA_START_CODE, 32);
1398 :    
1399 :     for (i = 0; i < length; i++) {
1400 :     BitstreamPutBits(bs, data[i], 8);
1401 :     }
1402 : suxen_drol 1.17
1403 : chl 1.24 }

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