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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 : Isibaar 1.55.2.1 * $Id: bitstream.c,v 1.55 2005/11/22 10:23:01 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 : Skal 1.52 static const uint8_t log2_tab_16[16] = { 0, 1, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4 };
37 : Skal 1.51
38 :     static uint32_t __inline log2bin(uint32_t value)
39 : Isibaar 1.1 {
40 : Skal 1.51 int n = 0;
41 :     if (value & 0xffff0000) {
42 :     value >>= 16;
43 :     n += 16;
44 :     }
45 :     if (value & 0xff00) {
46 :     value >>= 8;
47 :     n += 8;
48 :     }
49 :     if (value & 0xf0) {
50 :     value >>= 4;
51 :     n += 4;
52 :     }
53 :     return n + log2_tab_16[value];
54 : Isibaar 1.1 }
55 :    
56 : edgomez 1.14 static const uint32_t intra_dc_threshold_table[] = {
57 :     32, /* never use */
58 : Isibaar 1.1 13,
59 :     15,
60 :     17,
61 :     19,
62 :     21,
63 :     23,
64 :     1,
65 :     };
66 :    
67 :    
68 : suxen_drol 1.55 static void
69 : edgomez 1.14 bs_get_matrix(Bitstream * bs,
70 :     uint8_t * matrix)
71 :     {
72 :     int i = 0;
73 :     int last, value = 0;
74 :    
75 :     do {
76 :     last = value;
77 :     value = BitstreamGetBits(bs, 8);
78 :     matrix[scan_tables[0][i++]] = value;
79 :     }
80 :     while (value != 0 && i < 64);
81 :    
82 : syskin 1.45 if (value != 0) return;
83 :    
84 :     i--;
85 : edgomez 1.14 while (i < 64) {
86 :     matrix[scan_tables[0][i++]] = last;
87 :     }
88 :     }
89 : Isibaar 1.2
90 : suxen_drol 1.21
91 :    
92 : edgomez 1.42 /*
93 :     * for PVOP addbits == fcode - 1
94 :     * for BVOP addbits == max(fcode,bcode) - 1
95 :     * returns mbpos
96 :     */
97 : suxen_drol 1.21 int
98 : edgomez 1.42 read_video_packet_header(Bitstream *bs,
99 :     DECODER * dec,
100 :     const int addbits,
101 :     int * quant,
102 : edgomez 1.38 int * fcode_forward,
103 :     int * fcode_backward,
104 :     int * intra_dc_threshold)
105 : suxen_drol 1.21 {
106 : edgomez 1.38 int startcode_bits = NUMBITS_VP_RESYNC_MARKER + addbits;
107 :     int mbnum_bits = log2bin(dec->mb_width * dec->mb_height - 1);
108 : suxen_drol 1.21 int mbnum;
109 : edgomez 1.38 int hec = 0;
110 : suxen_drol 1.21
111 :     BitstreamSkip(bs, BitstreamNumBitsToByteAlign(bs));
112 : edgomez 1.38 BitstreamSkip(bs, startcode_bits);
113 : suxen_drol 1.21
114 : edgomez 1.42 DPRINTF(XVID_DEBUG_STARTCODE, "<video_packet_header>\n");
115 : suxen_drol 1.22
116 : edgomez 1.38 if (dec->shape != VIDOBJLAY_SHAPE_RECTANGULAR)
117 :     {
118 :     hec = BitstreamGetBit(bs); /* header_extension_code */
119 : edgomez 1.42 if (hec && !(dec->sprite_enable == SPRITE_STATIC /* && current_coding_type = I_VOP */))
120 : edgomez 1.38 {
121 :     BitstreamSkip(bs, 13); /* vop_width */
122 :     READ_MARKER();
123 :     BitstreamSkip(bs, 13); /* vop_height */
124 :     READ_MARKER();
125 :     BitstreamSkip(bs, 13); /* vop_horizontal_mc_spatial_ref */
126 :     READ_MARKER();
127 :     BitstreamSkip(bs, 13); /* vop_vertical_mc_spatial_ref */
128 :     READ_MARKER();
129 :     }
130 :     }
131 :    
132 :     mbnum = BitstreamGetBits(bs, mbnum_bits); /* macroblock_number */
133 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "mbnum %i\n", mbnum);
134 : suxen_drol 1.21
135 : edgomez 1.38 if (dec->shape != VIDOBJLAY_SHAPE_BINARY_ONLY)
136 :     {
137 : edgomez 1.42 *quant = BitstreamGetBits(bs, dec->quant_bits); /* quant_scale */
138 :     DPRINTF(XVID_DEBUG_HEADER, "quant %i\n", *quant);
139 : edgomez 1.38 }
140 : suxen_drol 1.21
141 : edgomez 1.38 if (dec->shape == VIDOBJLAY_SHAPE_RECTANGULAR)
142 :     hec = BitstreamGetBit(bs); /* header_extension_code */
143 : suxen_drol 1.21
144 :    
145 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "header_extension_code %i\n", hec);
146 : edgomez 1.38 if (hec)
147 :     {
148 :     int time_base;
149 :     int time_increment;
150 :     int coding_type;
151 :    
152 :     for (time_base=0; BitstreamGetBit(bs)!=0; time_base++); /* modulo_time_base */
153 :     READ_MARKER();
154 :     if (dec->time_inc_bits)
155 :     time_increment = (BitstreamGetBits(bs, dec->time_inc_bits)); /* vop_time_increment */
156 :     READ_MARKER();
157 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER,"time %i:%i\n", time_base, time_increment);
158 : edgomez 1.38
159 :     coding_type = BitstreamGetBits(bs, 2);
160 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER,"coding_type %i\n", coding_type);
161 :    
162 : edgomez 1.38 if (dec->shape != VIDOBJLAY_SHAPE_RECTANGULAR)
163 :     {
164 :     BitstreamSkip(bs, 1); /* change_conv_ratio_disable */
165 :     if (coding_type != I_VOP)
166 :     BitstreamSkip(bs, 1); /* vop_shape_coding_type */
167 :     }
168 :    
169 :     if (dec->shape != VIDOBJLAY_SHAPE_BINARY_ONLY)
170 :     {
171 :     *intra_dc_threshold = intra_dc_threshold_table[BitstreamGetBits(bs, 3)];
172 :    
173 :     if (dec->sprite_enable == SPRITE_GMC && coding_type == S_VOP &&
174 :     dec->sprite_warping_points > 0)
175 :     {
176 : edgomez 1.42 /* TODO: sprite trajectory */
177 : edgomez 1.38 }
178 : edgomez 1.42 if (dec->reduced_resolution_enable &&
179 : edgomez 1.38 dec->shape == VIDOBJLAY_SHAPE_RECTANGULAR &&
180 :     (coding_type == P_VOP || coding_type == I_VOP))
181 :     {
182 :     BitstreamSkip(bs, 1); /* XXX: vop_reduced_resolution */
183 :     }
184 :    
185 :     if (coding_type != I_VOP && fcode_forward)
186 :     {
187 :     *fcode_forward = BitstreamGetBits(bs, 3);
188 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER,"fcode_forward %i\n", *fcode_forward);
189 : edgomez 1.38 }
190 :    
191 :     if (coding_type == B_VOP && fcode_backward)
192 :     {
193 :     *fcode_backward = BitstreamGetBits(bs, 3);
194 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER,"fcode_backward %i\n", *fcode_backward);
195 : edgomez 1.38 }
196 :     }
197 :     }
198 :    
199 :     if (dec->newpred_enable)
200 :     {
201 :     int vop_id;
202 :     int vop_id_for_prediction;
203 : edgomez 1.42
204 : edgomez 1.38 vop_id = BitstreamGetBits(bs, MIN(dec->time_inc_bits + 3, 15));
205 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "vop_id %i\n", vop_id);
206 : edgomez 1.38 if (BitstreamGetBit(bs)) /* vop_id_for_prediction_indication */
207 :     {
208 :     vop_id_for_prediction = BitstreamGetBits(bs, MIN(dec->time_inc_bits + 3, 15));
209 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "vop_id_for_prediction %i\n", vop_id_for_prediction);
210 : edgomez 1.38 }
211 :     READ_MARKER();
212 :     }
213 : suxen_drol 1.21
214 :     return mbnum;
215 :     }
216 :    
217 :    
218 :    
219 : edgomez 1.38
220 :     /* vol estimation header */
221 :     static void
222 :     read_vol_complexity_estimation_header(Bitstream * bs, DECODER * dec)
223 :     {
224 :     ESTIMATION * e = &dec->estimation;
225 :    
226 :     e->method = BitstreamGetBits(bs, 2); /* estimation_method */
227 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER,"+ complexity_estimation_header; method=%i\n", e->method);
228 : edgomez 1.38
229 : edgomez 1.42 if (e->method == 0 || e->method == 1)
230 : edgomez 1.38 {
231 :     if (!BitstreamGetBit(bs)) /* shape_complexity_estimation_disable */
232 :     {
233 :     e->opaque = BitstreamGetBit(bs); /* opaque */
234 :     e->transparent = BitstreamGetBit(bs); /* transparent */
235 :     e->intra_cae = BitstreamGetBit(bs); /* intra_cae */
236 :     e->inter_cae = BitstreamGetBit(bs); /* inter_cae */
237 :     e->no_update = BitstreamGetBit(bs); /* no_update */
238 :     e->upsampling = BitstreamGetBit(bs); /* upsampling */
239 :     }
240 :    
241 :     if (!BitstreamGetBit(bs)) /* texture_complexity_estimation_set_1_disable */
242 :     {
243 :     e->intra_blocks = BitstreamGetBit(bs); /* intra_blocks */
244 :     e->inter_blocks = BitstreamGetBit(bs); /* inter_blocks */
245 :     e->inter4v_blocks = BitstreamGetBit(bs); /* inter4v_blocks */
246 :     e->not_coded_blocks = BitstreamGetBit(bs); /* not_coded_blocks */
247 :     }
248 :     }
249 :    
250 :     READ_MARKER();
251 :    
252 :     if (!BitstreamGetBit(bs)) /* texture_complexity_estimation_set_2_disable */
253 :     {
254 :     e->dct_coefs = BitstreamGetBit(bs); /* dct_coefs */
255 :     e->dct_lines = BitstreamGetBit(bs); /* dct_lines */
256 :     e->vlc_symbols = BitstreamGetBit(bs); /* vlc_symbols */
257 :     e->vlc_bits = BitstreamGetBit(bs); /* vlc_bits */
258 :     }
259 :    
260 :     if (!BitstreamGetBit(bs)) /* motion_compensation_complexity_disable */
261 :     {
262 :     e->apm = BitstreamGetBit(bs); /* apm */
263 :     e->npm = BitstreamGetBit(bs); /* npm */
264 :     e->interpolate_mc_q = BitstreamGetBit(bs); /* interpolate_mc_q */
265 :     e->forw_back_mc_q = BitstreamGetBit(bs); /* forw_back_mc_q */
266 :     e->halfpel2 = BitstreamGetBit(bs); /* halfpel2 */
267 :     e->halfpel4 = BitstreamGetBit(bs); /* halfpel4 */
268 :     }
269 :    
270 :     READ_MARKER();
271 :    
272 :     if (e->method == 1)
273 :     {
274 :     if (!BitstreamGetBit(bs)) /* version2_complexity_estimation_disable */
275 :     {
276 :     e->sadct = BitstreamGetBit(bs); /* sadct */
277 :     e->quarterpel = BitstreamGetBit(bs); /* quarterpel */
278 :     }
279 :     }
280 :     }
281 :    
282 :    
283 :     /* vop estimation header */
284 :     static void
285 :     read_vop_complexity_estimation_header(Bitstream * bs, DECODER * dec, int coding_type)
286 :     {
287 :     ESTIMATION * e = &dec->estimation;
288 :    
289 :     if (e->method == 0 || e->method == 1)
290 :     {
291 :     if (coding_type == I_VOP) {
292 :     if (e->opaque) BitstreamSkip(bs, 8); /* dcecs_opaque */
293 :     if (e->transparent) BitstreamSkip(bs, 8); /* */
294 :     if (e->intra_cae) BitstreamSkip(bs, 8); /* */
295 :     if (e->inter_cae) BitstreamSkip(bs, 8); /* */
296 :     if (e->no_update) BitstreamSkip(bs, 8); /* */
297 :     if (e->upsampling) BitstreamSkip(bs, 8); /* */
298 :     if (e->intra_blocks) BitstreamSkip(bs, 8); /* */
299 :     if (e->not_coded_blocks) BitstreamSkip(bs, 8); /* */
300 :     if (e->dct_coefs) BitstreamSkip(bs, 8); /* */
301 :     if (e->dct_lines) BitstreamSkip(bs, 8); /* */
302 :     if (e->vlc_symbols) BitstreamSkip(bs, 8); /* */
303 :     if (e->vlc_bits) BitstreamSkip(bs, 8); /* */
304 :     if (e->sadct) BitstreamSkip(bs, 8); /* */
305 :     }
306 : edgomez 1.42
307 : edgomez 1.38 if (coding_type == P_VOP) {
308 :     if (e->opaque) BitstreamSkip(bs, 8); /* */
309 :     if (e->transparent) BitstreamSkip(bs, 8); /* */
310 :     if (e->intra_cae) BitstreamSkip(bs, 8); /* */
311 :     if (e->inter_cae) BitstreamSkip(bs, 8); /* */
312 :     if (e->no_update) BitstreamSkip(bs, 8); /* */
313 :     if (e->upsampling) BitstreamSkip(bs, 8); /* */
314 :     if (e->intra_blocks) BitstreamSkip(bs, 8); /* */
315 :     if (e->not_coded_blocks) BitstreamSkip(bs, 8); /* */
316 :     if (e->dct_coefs) BitstreamSkip(bs, 8); /* */
317 :     if (e->dct_lines) BitstreamSkip(bs, 8); /* */
318 :     if (e->vlc_symbols) BitstreamSkip(bs, 8); /* */
319 :     if (e->vlc_bits) BitstreamSkip(bs, 8); /* */
320 :     if (e->inter_blocks) BitstreamSkip(bs, 8); /* */
321 :     if (e->inter4v_blocks) BitstreamSkip(bs, 8); /* */
322 :     if (e->apm) BitstreamSkip(bs, 8); /* */
323 :     if (e->npm) BitstreamSkip(bs, 8); /* */
324 :     if (e->forw_back_mc_q) BitstreamSkip(bs, 8); /* */
325 :     if (e->halfpel2) BitstreamSkip(bs, 8); /* */
326 :     if (e->halfpel4) BitstreamSkip(bs, 8); /* */
327 :     if (e->sadct) BitstreamSkip(bs, 8); /* */
328 :     if (e->quarterpel) BitstreamSkip(bs, 8); /* */
329 :     }
330 :     if (coding_type == B_VOP) {
331 :     if (e->opaque) BitstreamSkip(bs, 8); /* */
332 :     if (e->transparent) BitstreamSkip(bs, 8); /* */
333 :     if (e->intra_cae) BitstreamSkip(bs, 8); /* */
334 :     if (e->inter_cae) BitstreamSkip(bs, 8); /* */
335 :     if (e->no_update) BitstreamSkip(bs, 8); /* */
336 :     if (e->upsampling) BitstreamSkip(bs, 8); /* */
337 :     if (e->intra_blocks) BitstreamSkip(bs, 8); /* */
338 :     if (e->not_coded_blocks) BitstreamSkip(bs, 8); /* */
339 :     if (e->dct_coefs) BitstreamSkip(bs, 8); /* */
340 :     if (e->dct_lines) BitstreamSkip(bs, 8); /* */
341 :     if (e->vlc_symbols) BitstreamSkip(bs, 8); /* */
342 :     if (e->vlc_bits) BitstreamSkip(bs, 8); /* */
343 :     if (e->inter_blocks) BitstreamSkip(bs, 8); /* */
344 :     if (e->inter4v_blocks) BitstreamSkip(bs, 8); /* */
345 :     if (e->apm) BitstreamSkip(bs, 8); /* */
346 :     if (e->npm) BitstreamSkip(bs, 8); /* */
347 :     if (e->forw_back_mc_q) BitstreamSkip(bs, 8); /* */
348 :     if (e->halfpel2) BitstreamSkip(bs, 8); /* */
349 :     if (e->halfpel4) BitstreamSkip(bs, 8); /* */
350 :     if (e->interpolate_mc_q) BitstreamSkip(bs, 8); /* */
351 :     if (e->sadct) BitstreamSkip(bs, 8); /* */
352 :     if (e->quarterpel) BitstreamSkip(bs, 8); /* */
353 :     }
354 :    
355 :     if (coding_type == S_VOP && dec->sprite_enable == SPRITE_STATIC) {
356 :     if (e->intra_blocks) BitstreamSkip(bs, 8); /* */
357 :     if (e->not_coded_blocks) BitstreamSkip(bs, 8); /* */
358 :     if (e->dct_coefs) BitstreamSkip(bs, 8); /* */
359 :     if (e->dct_lines) BitstreamSkip(bs, 8); /* */
360 :     if (e->vlc_symbols) BitstreamSkip(bs, 8); /* */
361 :     if (e->vlc_bits) BitstreamSkip(bs, 8); /* */
362 :     if (e->inter_blocks) BitstreamSkip(bs, 8); /* */
363 :     if (e->inter4v_blocks) BitstreamSkip(bs, 8); /* */
364 :     if (e->apm) BitstreamSkip(bs, 8); /* */
365 :     if (e->npm) BitstreamSkip(bs, 8); /* */
366 :     if (e->forw_back_mc_q) BitstreamSkip(bs, 8); /* */
367 :     if (e->halfpel2) BitstreamSkip(bs, 8); /* */
368 :     if (e->halfpel4) BitstreamSkip(bs, 8); /* */
369 :     if (e->interpolate_mc_q) BitstreamSkip(bs, 8); /* */
370 :     }
371 :     }
372 :     }
373 :    
374 :    
375 :    
376 :    
377 :    
378 : Isibaar 1.1 /*
379 :     decode headers
380 :     returns coding_type, or -1 if error
381 :     */
382 :    
383 : suxen_drol 1.22 #define VIDOBJ_START_CODE_MASK 0x0000001f
384 :     #define VIDOBJLAY_START_CODE_MASK 0x0000000f
385 :    
386 : edgomez 1.14 int
387 :     BitstreamReadHeaders(Bitstream * bs,
388 :     DECODER * dec,
389 :     uint32_t * rounding,
390 :     uint32_t * quant,
391 :     uint32_t * fcode_forward,
392 :     uint32_t * fcode_backward,
393 : edgomez 1.38 uint32_t * intra_dc_threshold,
394 :     WARPPOINTS *gmc_warp)
395 : Isibaar 1.1 {
396 :     uint32_t vol_ver_id;
397 :     uint32_t coding_type;
398 :     uint32_t start_code;
399 : edgomez 1.14 uint32_t time_incr = 0;
400 : edgomez 1.39 int32_t time_increment = 0;
401 : edgomez 1.38 int resize = 0;
402 : chenm001 1.9
403 : syskin 1.47 while ((BitstreamPos(bs) >> 3) + 4 <= bs->length) {
404 : edgomez 1.38
405 : Isibaar 1.1 BitstreamByteAlign(bs);
406 :     start_code = BitstreamShowBits(bs, 32);
407 :    
408 : edgomez 1.14 if (start_code == VISOBJSEQ_START_CODE) {
409 : suxen_drol 1.22
410 :     int profile;
411 :    
412 : edgomez 1.42 DPRINTF(XVID_DEBUG_STARTCODE, "<visual_object_sequence>\n");
413 : suxen_drol 1.22
414 : edgomez 1.42 BitstreamSkip(bs, 32); /* visual_object_sequence_start_code */
415 :     profile = BitstreamGetBits(bs, 8); /* profile_and_level_indication */
416 : suxen_drol 1.22
417 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "profile_and_level_indication %i\n", profile);
418 : suxen_drol 1.22
419 : edgomez 1.14 } else if (start_code == VISOBJSEQ_STOP_CODE) {
420 : suxen_drol 1.22
421 : edgomez 1.42 BitstreamSkip(bs, 32); /* visual_object_sequence_stop_code */
422 : suxen_drol 1.22
423 : edgomez 1.42 DPRINTF(XVID_DEBUG_STARTCODE, "</visual_object_sequence>\n");
424 : suxen_drol 1.22
425 : edgomez 1.14 } else if (start_code == VISOBJ_START_CODE) {
426 : edgomez 1.42 DPRINTF(XVID_DEBUG_STARTCODE, "<visual_object>\n");
427 : suxen_drol 1.22
428 : edgomez 1.42 BitstreamSkip(bs, 32); /* visual_object_start_code */
429 :     if (BitstreamGetBit(bs)) /* is_visual_object_identified */
430 : Isibaar 1.1 {
431 : Isibaar 1.55.2.1 dec->ver_id = BitstreamGetBits(bs, 4); /* visual_object_ver_id */
432 :     DPRINTF(XVID_DEBUG_HEADER,"visobj_ver_id %i\n", dec->ver_id);
433 : edgomez 1.42 BitstreamSkip(bs, 3); /* visual_object_priority */
434 : edgomez 1.14 } else {
435 : Isibaar 1.55.2.1 dec->ver_id = 1;
436 : Isibaar 1.1 }
437 :    
438 : edgomez 1.42 if (BitstreamShowBits(bs, 4) != VISOBJ_TYPE_VIDEO) /* visual_object_type */
439 : Isibaar 1.1 {
440 : edgomez 1.42 DPRINTF(XVID_DEBUG_ERROR, "visual_object_type != video\n");
441 : Isibaar 1.1 return -1;
442 :     }
443 :     BitstreamSkip(bs, 4);
444 :    
445 : edgomez 1.42 /* video_signal_type */
446 : Isibaar 1.1
447 : edgomez 1.42 if (BitstreamGetBit(bs)) /* video_signal_type */
448 : Isibaar 1.1 {
449 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER,"+ video_signal_type\n");
450 :     BitstreamSkip(bs, 3); /* video_format */
451 :     BitstreamSkip(bs, 1); /* video_range */
452 :     if (BitstreamGetBit(bs)) /* color_description */
453 : Isibaar 1.1 {
454 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER,"+ color_description");
455 :     BitstreamSkip(bs, 8); /* color_primaries */
456 :     BitstreamSkip(bs, 8); /* transfer_characteristics */
457 :     BitstreamSkip(bs, 8); /* matrix_coefficients */
458 : Isibaar 1.1 }
459 :     }
460 : suxen_drol 1.22 } else if ((start_code & ~VIDOBJ_START_CODE_MASK) == VIDOBJ_START_CODE) {
461 :    
462 : edgomez 1.42 DPRINTF(XVID_DEBUG_STARTCODE, "<video_object>\n");
463 :     DPRINTF(XVID_DEBUG_HEADER, "vo id %i\n", start_code & VIDOBJ_START_CODE_MASK);
464 : suxen_drol 1.22
465 : edgomez 1.42 BitstreamSkip(bs, 32); /* video_object_start_code */
466 : suxen_drol 1.22
467 :     } else if ((start_code & ~VIDOBJLAY_START_CODE_MASK) == VIDOBJLAY_START_CODE) {
468 :    
469 : edgomez 1.42 DPRINTF(XVID_DEBUG_STARTCODE, "<video_object_layer>\n");
470 :     DPRINTF(XVID_DEBUG_HEADER, "vol id %i\n", start_code & VIDOBJLAY_START_CODE_MASK);
471 : Isibaar 1.1
472 : edgomez 1.42 BitstreamSkip(bs, 32); /* video_object_layer_start_code */
473 :     BitstreamSkip(bs, 1); /* random_accessible_vol */
474 : Isibaar 1.1
475 : edgomez 1.42 BitstreamSkip(bs, 8); /* video_object_type_indication */
476 : Isibaar 1.1
477 : edgomez 1.42 if (BitstreamGetBit(bs)) /* is_object_layer_identifier */
478 : Isibaar 1.1 {
479 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "+ is_object_layer_identifier\n");
480 :     vol_ver_id = BitstreamGetBits(bs, 4); /* video_object_layer_verid */
481 :     DPRINTF(XVID_DEBUG_HEADER,"ver_id %i\n", vol_ver_id);
482 :     BitstreamSkip(bs, 3); /* video_object_layer_priority */
483 : edgomez 1.14 } else {
484 : Isibaar 1.55.2.1 vol_ver_id = dec->ver_id;
485 : Isibaar 1.1 }
486 :    
487 : edgomez 1.38 dec->aspect_ratio = BitstreamGetBits(bs, 4);
488 :    
489 : edgomez 1.42 if (dec->aspect_ratio == VIDOBJLAY_AR_EXTPAR) /* aspect_ratio_info */
490 : Isibaar 1.1 {
491 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "+ aspect_ratio_info\n");
492 :     dec->par_width = BitstreamGetBits(bs, 8); /* par_width */
493 :     dec->par_height = BitstreamGetBits(bs, 8); /* par_height */
494 : Isibaar 1.1 }
495 :    
496 : edgomez 1.42 if (BitstreamGetBit(bs)) /* vol_control_parameters */
497 : Isibaar 1.1 {
498 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "+ vol_control_parameters\n");
499 :     BitstreamSkip(bs, 2); /* chroma_format */
500 :     dec->low_delay = BitstreamGetBit(bs); /* low_delay */
501 :     DPRINTF(XVID_DEBUG_HEADER, "low_delay %i\n", dec->low_delay);
502 :     if (BitstreamGetBit(bs)) /* vbv_parameters */
503 : Isibaar 1.1 {
504 : edgomez 1.38 unsigned int bitrate;
505 :     unsigned int buffer_size;
506 :     unsigned int occupancy;
507 :    
508 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER,"+ vbv_parameters\n");
509 : edgomez 1.38
510 : edgomez 1.42 bitrate = BitstreamGetBits(bs,15) << 15; /* first_half_bit_rate */
511 : Isibaar 1.1 READ_MARKER();
512 : edgomez 1.42 bitrate |= BitstreamGetBits(bs,15); /* latter_half_bit_rate */
513 : Isibaar 1.1 READ_MARKER();
514 : edgomez 1.42
515 :     buffer_size = BitstreamGetBits(bs, 15) << 3; /* first_half_vbv_buffer_size */
516 : Isibaar 1.1 READ_MARKER();
517 : edgomez 1.42 buffer_size |= BitstreamGetBits(bs, 3); /* latter_half_vbv_buffer_size */
518 : edgomez 1.38
519 : edgomez 1.42 occupancy = BitstreamGetBits(bs, 11) << 15; /* first_half_vbv_occupancy */
520 : Isibaar 1.1 READ_MARKER();
521 : edgomez 1.42 occupancy |= BitstreamGetBits(bs, 15); /* latter_half_vbv_occupancy */
522 : Isibaar 1.1 READ_MARKER();
523 : edgomez 1.14
524 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER,"bitrate %d (unit=400 bps)\n", bitrate);
525 :     DPRINTF(XVID_DEBUG_HEADER,"buffer_size %d (unit=16384 bits)\n", buffer_size);
526 :     DPRINTF(XVID_DEBUG_HEADER,"occupancy %d (unit=64 bits)\n", occupancy);
527 : Isibaar 1.1 }
528 : edgomez 1.38 }else{
529 :     dec->low_delay = dec->low_delay_default;
530 : Isibaar 1.1 }
531 :    
532 : edgomez 1.42 dec->shape = BitstreamGetBits(bs, 2); /* video_object_layer_shape */
533 : edgomez 1.38
534 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "shape %i\n", dec->shape);
535 : edgomez 1.38 if (dec->shape != VIDOBJLAY_SHAPE_RECTANGULAR)
536 :     {
537 : edgomez 1.42 DPRINTF(XVID_DEBUG_ERROR,"non-rectangular shapes are not supported\n");
538 : edgomez 1.38 }
539 : edgomez 1.14
540 :     if (dec->shape == VIDOBJLAY_SHAPE_GRAYSCALE && vol_ver_id != 1) {
541 : edgomez 1.42 BitstreamSkip(bs, 4); /* video_object_layer_shape_extension */
542 : Isibaar 1.1 }
543 :    
544 :     READ_MARKER();
545 :    
546 : edgomez 1.42 /********************** for decode B-frame time ***********************/
547 :     dec->time_inc_resolution = BitstreamGetBits(bs, 16); /* vop_time_increment_resolution */
548 :     DPRINTF(XVID_DEBUG_HEADER,"vop_time_increment_resolution %i\n", dec->time_inc_resolution);
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 /* for "old" xvid compatibility, set time_inc_bits = 1 */
554 : Isibaar 1.1 dec->time_inc_bits = 1;
555 :     }
556 :    
557 :     READ_MARKER();
558 :    
559 : edgomez 1.42 if (BitstreamGetBit(bs)) /* fixed_vop_rate */
560 : Isibaar 1.1 {
561 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "+ fixed_vop_rate\n");
562 :     BitstreamSkip(bs, dec->time_inc_bits); /* fixed_vop_time_increment */
563 : Isibaar 1.1 }
564 :    
565 : edgomez 1.14 if (dec->shape != VIDOBJLAY_SHAPE_BINARY_ONLY) {
566 : Isibaar 1.1
567 : edgomez 1.14 if (dec->shape == VIDOBJLAY_SHAPE_RECTANGULAR) {
568 : Isibaar 1.1 uint32_t width, height;
569 :    
570 :     READ_MARKER();
571 : edgomez 1.42 width = BitstreamGetBits(bs, 13); /* video_object_layer_width */
572 : Isibaar 1.1 READ_MARKER();
573 : edgomez 1.42 height = BitstreamGetBits(bs, 13); /* video_object_layer_height */
574 : Isibaar 1.1 READ_MARKER();
575 :    
576 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "width %i\n", width);
577 :     DPRINTF(XVID_DEBUG_HEADER, "height %i\n", height);
578 : chenm001 1.23
579 : edgomez 1.38 if (dec->width != width || dec->height != height)
580 :     {
581 :     if (dec->fixed_dimensions)
582 :     {
583 : edgomez 1.42 DPRINTF(XVID_DEBUG_ERROR, "decoder width/height does not match bitstream\n");
584 : edgomez 1.38 return -1;
585 :     }
586 :     resize = 1;
587 : chenm001 1.23 dec->width = width;
588 :     dec->height = height;
589 : Isibaar 1.1 }
590 :     }
591 : h 1.4
592 : suxen_drol 1.22 dec->interlacing = BitstreamGetBit(bs);
593 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "interlacing %i\n", dec->interlacing);
594 : Isibaar 1.1
595 : edgomez 1.42 if (!BitstreamGetBit(bs)) /* obmc_disable */
596 : Isibaar 1.1 {
597 : edgomez 1.42 DPRINTF(XVID_DEBUG_ERROR, "obmc_disabled==false not supported\n");
598 :     /* TODO */
599 :     /* fucking divx4.02 has this enabled */
600 : Isibaar 1.1 }
601 :    
602 : edgomez 1.42 dec->sprite_enable = BitstreamGetBits(bs, (vol_ver_id == 1 ? 1 : 2)); /* sprite_enable */
603 : edgomez 1.38
604 :     if (dec->sprite_enable == SPRITE_STATIC || dec->sprite_enable == SPRITE_GMC)
605 : Isibaar 1.1 {
606 : edgomez 1.38 int low_latency_sprite_enable;
607 :    
608 :     if (dec->sprite_enable != SPRITE_GMC)
609 :     {
610 :     int sprite_width;
611 :     int sprite_height;
612 :     int sprite_left_coord;
613 :     int sprite_top_coord;
614 : edgomez 1.42 sprite_width = BitstreamGetBits(bs, 13); /* sprite_width */
615 : edgomez 1.38 READ_MARKER();
616 : edgomez 1.42 sprite_height = BitstreamGetBits(bs, 13); /* sprite_height */
617 : edgomez 1.38 READ_MARKER();
618 : edgomez 1.42 sprite_left_coord = BitstreamGetBits(bs, 13); /* sprite_left_coordinate */
619 : edgomez 1.38 READ_MARKER();
620 : edgomez 1.42 sprite_top_coord = BitstreamGetBits(bs, 13); /* sprite_top_coordinate */
621 : edgomez 1.38 READ_MARKER();
622 :     }
623 : edgomez 1.42 dec->sprite_warping_points = BitstreamGetBits(bs, 6); /* no_of_sprite_warping_points */
624 :     dec->sprite_warping_accuracy = BitstreamGetBits(bs, 2); /* sprite_warping_accuracy */
625 :     dec->sprite_brightness_change = BitstreamGetBits(bs, 1); /* brightness_change */
626 : edgomez 1.38 if (dec->sprite_enable != SPRITE_GMC)
627 :     {
628 : edgomez 1.42 low_latency_sprite_enable = BitstreamGetBits(bs, 1); /* low_latency_sprite_enable */
629 : edgomez 1.38 }
630 : Isibaar 1.1 }
631 : edgomez 1.14
632 :     if (vol_ver_id != 1 &&
633 :     dec->shape != VIDOBJLAY_SHAPE_RECTANGULAR) {
634 : edgomez 1.42 BitstreamSkip(bs, 1); /* sadct_disable */
635 : Isibaar 1.1 }
636 :    
637 : edgomez 1.42 if (BitstreamGetBit(bs)) /* not_8_bit */
638 : Isibaar 1.1 {
639 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "not_8_bit==true (ignored)\n");
640 :     dec->quant_bits = BitstreamGetBits(bs, 4); /* quant_precision */
641 :     BitstreamSkip(bs, 4); /* bits_per_pixel */
642 : edgomez 1.14 } else {
643 : Isibaar 1.1 dec->quant_bits = 5;
644 :     }
645 :    
646 : edgomez 1.14 if (dec->shape == VIDOBJLAY_SHAPE_GRAYSCALE) {
647 : edgomez 1.42 BitstreamSkip(bs, 1); /* no_gray_quant_update */
648 :     BitstreamSkip(bs, 1); /* composition_method */
649 :     BitstreamSkip(bs, 1); /* linear_composition */
650 : Isibaar 1.1 }
651 :    
652 : edgomez 1.42 dec->quant_type = BitstreamGetBit(bs); /* quant_type */
653 :     DPRINTF(XVID_DEBUG_HEADER, "quant_type %i\n", dec->quant_type);
654 : Isibaar 1.1
655 : edgomez 1.14 if (dec->quant_type) {
656 : edgomez 1.42 if (BitstreamGetBit(bs)) /* load_intra_quant_mat */
657 : Isibaar 1.1 {
658 : Isibaar 1.3 uint8_t matrix[64];
659 : edgomez 1.14
660 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "load_intra_quant_mat\n");
661 : suxen_drol 1.22
662 : Isibaar 1.2 bs_get_matrix(bs, matrix);
663 : edgomez 1.42 set_intra_matrix(dec->mpeg_quant_matrices, matrix);
664 : edgomez 1.14 } else
665 : edgomez 1.42 set_intra_matrix(dec->mpeg_quant_matrices, get_default_intra_matrix());
666 : Isibaar 1.2
667 : edgomez 1.42 if (BitstreamGetBit(bs)) /* load_inter_quant_mat */
668 : Isibaar 1.1 {
669 : edgomez 1.14 uint8_t matrix[64];
670 : edgomez 1.42
671 :     DPRINTF(XVID_DEBUG_HEADER, "load_inter_quant_mat\n");
672 : edgomez 1.14
673 : Isibaar 1.2 bs_get_matrix(bs, matrix);
674 : edgomez 1.42 set_inter_matrix(dec->mpeg_quant_matrices, matrix);
675 : edgomez 1.14 } else
676 : edgomez 1.42 set_inter_matrix(dec->mpeg_quant_matrices, get_default_inter_matrix());
677 : Isibaar 1.1
678 : edgomez 1.14 if (dec->shape == VIDOBJLAY_SHAPE_GRAYSCALE) {
679 : edgomez 1.42 DPRINTF(XVID_DEBUG_ERROR, "greyscale matrix not supported\n");
680 : Isibaar 1.1 return -1;
681 :     }
682 : Isibaar 1.2
683 : Isibaar 1.1 }
684 :    
685 : edgomez 1.14
686 :     if (vol_ver_id != 1) {
687 : edgomez 1.42 dec->quarterpel = BitstreamGetBit(bs); /* quarter_sample */
688 :     DPRINTF(XVID_DEBUG_HEADER,"quarterpel %i\n", dec->quarterpel);
689 : Isibaar 1.26 }
690 :     else
691 : Isibaar 1.1 dec->quarterpel = 0;
692 : edgomez 1.42
693 : Isibaar 1.1
694 : edgomez 1.38 dec->complexity_estimation_disable = BitstreamGetBit(bs); /* complexity estimation disable */
695 :     if (!dec->complexity_estimation_disable)
696 : Isibaar 1.1 {
697 : edgomez 1.38 read_vol_complexity_estimation_header(bs, dec);
698 : Isibaar 1.1 }
699 :    
700 : edgomez 1.42 BitstreamSkip(bs, 1); /* resync_marker_disable */
701 : Isibaar 1.1
702 : edgomez 1.42 if (BitstreamGetBit(bs)) /* data_partitioned */
703 : Isibaar 1.1 {
704 : edgomez 1.42 DPRINTF(XVID_DEBUG_ERROR, "data_partitioned not supported\n");
705 :     BitstreamSkip(bs, 1); /* reversible_vlc */
706 : Isibaar 1.1 }
707 :    
708 : edgomez 1.14 if (vol_ver_id != 1) {
709 : edgomez 1.38 dec->newpred_enable = BitstreamGetBit(bs);
710 : edgomez 1.42 if (dec->newpred_enable) /* newpred_enable */
711 : Isibaar 1.1 {
712 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "+ newpred_enable\n");
713 :     BitstreamSkip(bs, 2); /* requested_upstream_message_type */
714 :     BitstreamSkip(bs, 1); /* newpred_segment_type */
715 : Isibaar 1.1 }
716 : edgomez 1.38 dec->reduced_resolution_enable = BitstreamGetBit(bs); /* reduced_resolution_vop_enable */
717 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "reduced_resolution_enable %i\n", dec->reduced_resolution_enable);
718 : edgomez 1.38 }
719 :     else
720 :     {
721 :     dec->newpred_enable = 0;
722 :     dec->reduced_resolution_enable = 0;
723 : Isibaar 1.1 }
724 : edgomez 1.14
725 : edgomez 1.38 dec->scalability = BitstreamGetBit(bs); /* scalability */
726 : edgomez 1.42 if (dec->scalability)
727 : Isibaar 1.1 {
728 : edgomez 1.42 DPRINTF(XVID_DEBUG_ERROR, "scalability not supported\n");
729 : edgomez 1.38 BitstreamSkip(bs, 1); /* hierarchy_type */
730 :     BitstreamSkip(bs, 4); /* ref_layer_id */
731 :     BitstreamSkip(bs, 1); /* ref_layer_sampling_direc */
732 :     BitstreamSkip(bs, 5); /* hor_sampling_factor_n */
733 :     BitstreamSkip(bs, 5); /* hor_sampling_factor_m */
734 :     BitstreamSkip(bs, 5); /* vert_sampling_factor_n */
735 :     BitstreamSkip(bs, 5); /* vert_sampling_factor_m */
736 :     BitstreamSkip(bs, 1); /* enhancement_type */
737 :     if(dec->shape == VIDOBJLAY_SHAPE_BINARY /* && hierarchy_type==0 */) {
738 :     BitstreamSkip(bs, 1); /* use_ref_shape */
739 :     BitstreamSkip(bs, 1); /* use_ref_texture */
740 :     BitstreamSkip(bs, 5); /* shape_hor_sampling_factor_n */
741 :     BitstreamSkip(bs, 5); /* shape_hor_sampling_factor_m */
742 :     BitstreamSkip(bs, 5); /* shape_vert_sampling_factor_n */
743 :     BitstreamSkip(bs, 5); /* shape_vert_sampling_factor_m */
744 :     }
745 : Isibaar 1.1 return -1;
746 :     }
747 : edgomez 1.42 } else /* dec->shape == BINARY_ONLY */
748 : Isibaar 1.1 {
749 : edgomez 1.14 if (vol_ver_id != 1) {
750 : edgomez 1.38 dec->scalability = BitstreamGetBit(bs); /* scalability */
751 : edgomez 1.42 if (dec->scalability)
752 : Isibaar 1.1 {
753 : edgomez 1.42 DPRINTF(XVID_DEBUG_ERROR, "scalability not supported\n");
754 : edgomez 1.38 BitstreamSkip(bs, 4); /* ref_layer_id */
755 :     BitstreamSkip(bs, 5); /* hor_sampling_factor_n */
756 :     BitstreamSkip(bs, 5); /* hor_sampling_factor_m */
757 :     BitstreamSkip(bs, 5); /* vert_sampling_factor_n */
758 :     BitstreamSkip(bs, 5); /* vert_sampling_factor_m */
759 : Isibaar 1.1 return -1;
760 :     }
761 :     }
762 : edgomez 1.42 BitstreamSkip(bs, 1); /* resync_marker_disable */
763 : Isibaar 1.1
764 :     }
765 :    
766 : edgomez 1.38 return (resize ? -3 : -2 ); /* VOL */
767 :    
768 : edgomez 1.14 } else if (start_code == GRPOFVOP_START_CODE) {
769 : suxen_drol 1.22
770 : edgomez 1.42 DPRINTF(XVID_DEBUG_STARTCODE, "<group_of_vop>\n");
771 : suxen_drol 1.22
772 : Isibaar 1.1 BitstreamSkip(bs, 32);
773 :     {
774 :     int hours, minutes, seconds;
775 : edgomez 1.14
776 : Isibaar 1.1 hours = BitstreamGetBits(bs, 5);
777 :     minutes = BitstreamGetBits(bs, 6);
778 :     READ_MARKER();
779 :     seconds = BitstreamGetBits(bs, 6);
780 : edgomez 1.42
781 :     DPRINTF(XVID_DEBUG_HEADER, "time %ih%im%is\n", hours,minutes,seconds);
782 : Isibaar 1.1 }
783 : edgomez 1.42 BitstreamSkip(bs, 1); /* closed_gov */
784 :     BitstreamSkip(bs, 1); /* broken_link */
785 : suxen_drol 1.22
786 : edgomez 1.14 } else if (start_code == VOP_START_CODE) {
787 : suxen_drol 1.22
788 : edgomez 1.42 DPRINTF(XVID_DEBUG_STARTCODE, "<vop>\n");
789 : suxen_drol 1.22
790 : edgomez 1.42 BitstreamSkip(bs, 32); /* vop_start_code */
791 : Isibaar 1.1
792 : edgomez 1.42 coding_type = BitstreamGetBits(bs, 2); /* vop_coding_type */
793 :     DPRINTF(XVID_DEBUG_HEADER, "coding_type %i\n", coding_type);
794 : Isibaar 1.1
795 : edgomez 1.42 /*********************** for decode B-frame time ***********************/
796 :     while (BitstreamGetBit(bs) != 0) /* time_base */
797 : chenm001 1.9 time_incr++;
798 : edgomez 1.14
799 : Isibaar 1.1 READ_MARKER();
800 : edgomez 1.14
801 :     if (dec->time_inc_bits) {
802 : edgomez 1.42 time_increment = (BitstreamGetBits(bs, dec->time_inc_bits)); /* vop_time_increment */
803 : chenm001 1.9 }
804 : suxen_drol 1.19
805 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "time_base %i\n", time_incr);
806 :     DPRINTF(XVID_DEBUG_HEADER, "time_increment %i\n", time_increment);
807 : suxen_drol 1.22
808 : edgomez 1.42 DPRINTF(XVID_DEBUG_TIMECODE, "%c %i:%i\n",
809 : edgomez 1.38 coding_type == I_VOP ? 'I' : coding_type == P_VOP ? 'P' : coding_type == B_VOP ? 'B' : 'S',
810 : suxen_drol 1.19 time_incr, time_increment);
811 :    
812 : edgomez 1.14 if (coding_type != B_VOP) {
813 :     dec->last_time_base = dec->time_base;
814 : chenm001 1.9 dec->time_base += time_incr;
815 : edgomez 1.44 dec->time = dec->time_base*dec->time_inc_resolution + time_increment;
816 :     dec->time_pp = (int32_t)(dec->time - dec->last_non_b_time);
817 : edgomez 1.14 dec->last_non_b_time = dec->time;
818 :     } else {
819 : edgomez 1.44 dec->time = (dec->last_time_base + time_incr)*dec->time_inc_resolution + time_increment;
820 :     dec->time_bp = dec->time_pp - (int32_t)(dec->last_non_b_time - dec->time);
821 : Isibaar 1.1 }
822 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER,"time_pp=%i\n", dec->time_pp);
823 :     DPRINTF(XVID_DEBUG_HEADER,"time_bp=%i\n", dec->time_bp);
824 : Isibaar 1.1
825 :     READ_MARKER();
826 :    
827 : edgomez 1.42 if (!BitstreamGetBit(bs)) /* vop_coded */
828 : Isibaar 1.1 {
829 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "vop_coded==false\n");
830 : Isibaar 1.1 return N_VOP;
831 :     }
832 :    
833 : edgomez 1.38 if (dec->newpred_enable)
834 :     {
835 :     int vop_id;
836 :     int vop_id_for_prediction;
837 : edgomez 1.42
838 : edgomez 1.38 vop_id = BitstreamGetBits(bs, MIN(dec->time_inc_bits + 3, 15));
839 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "vop_id %i\n", vop_id);
840 : edgomez 1.38 if (BitstreamGetBit(bs)) /* vop_id_for_prediction_indication */
841 :     {
842 :     vop_id_for_prediction = BitstreamGetBits(bs, MIN(dec->time_inc_bits + 3, 15));
843 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "vop_id_for_prediction %i\n", vop_id_for_prediction);
844 : edgomez 1.38 }
845 :     READ_MARKER();
846 :     }
847 :    
848 : Isibaar 1.1
849 : edgomez 1.42
850 :     /* fix a little bug by MinChen <chenm002@163.com> */
851 : edgomez 1.14 if ((dec->shape != VIDOBJLAY_SHAPE_BINARY_ONLY) &&
852 : edgomez 1.38 ( (coding_type == P_VOP) || (coding_type == S_VOP && dec->sprite_enable == SPRITE_GMC) ) ) {
853 : edgomez 1.42 *rounding = BitstreamGetBit(bs); /* rounding_type */
854 :     DPRINTF(XVID_DEBUG_HEADER, "rounding %i\n", *rounding);
855 : Isibaar 1.1 }
856 :    
857 : edgomez 1.38 if (dec->reduced_resolution_enable &&
858 :     dec->shape == VIDOBJLAY_SHAPE_RECTANGULAR &&
859 :     (coding_type == P_VOP || coding_type == I_VOP)) {
860 :    
861 : syskin 1.48 if (BitstreamGetBit(bs));
862 :     DPRINTF(XVID_DEBUG_ERROR, "RRV not supported (anymore)\n");
863 : edgomez 1.38 }
864 : Isibaar 1.1
865 : edgomez 1.14 if (dec->shape != VIDOBJLAY_SHAPE_RECTANGULAR) {
866 : edgomez 1.38 if(!(dec->sprite_enable == SPRITE_STATIC && coding_type == I_VOP)) {
867 : edgomez 1.14
868 : edgomez 1.38 uint32_t width, height;
869 :     uint32_t horiz_mc_ref, vert_mc_ref;
870 : Isibaar 1.1
871 : edgomez 1.38 width = BitstreamGetBits(bs, 13);
872 :     READ_MARKER();
873 :     height = BitstreamGetBits(bs, 13);
874 :     READ_MARKER();
875 :     horiz_mc_ref = BitstreamGetBits(bs, 13);
876 :     READ_MARKER();
877 :     vert_mc_ref = BitstreamGetBits(bs, 13);
878 :     READ_MARKER();
879 : Isibaar 1.1
880 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "width %i\n", width);
881 :     DPRINTF(XVID_DEBUG_HEADER, "height %i\n", height);
882 :     DPRINTF(XVID_DEBUG_HEADER, "horiz_mc_ref %i\n", horiz_mc_ref);
883 :     DPRINTF(XVID_DEBUG_HEADER, "vert_mc_ref %i\n", vert_mc_ref);
884 : edgomez 1.38 }
885 :    
886 : edgomez 1.42 BitstreamSkip(bs, 1); /* change_conv_ratio_disable */
887 :     if (BitstreamGetBit(bs)) /* vop_constant_alpha */
888 : Isibaar 1.1 {
889 : edgomez 1.42 BitstreamSkip(bs, 8); /* vop_constant_alpha_value */
890 : Isibaar 1.1 }
891 :     }
892 :    
893 : edgomez 1.38 if (dec->shape != VIDOBJLAY_SHAPE_BINARY_ONLY) {
894 : edgomez 1.14
895 : edgomez 1.38 if (!dec->complexity_estimation_disable)
896 :     {
897 :     read_vop_complexity_estimation_header(bs, dec, coding_type);
898 :     }
899 :    
900 : edgomez 1.42 /* intra_dc_vlc_threshold */
901 : edgomez 1.14 *intra_dc_threshold =
902 :     intra_dc_threshold_table[BitstreamGetBits(bs, 3)];
903 : Isibaar 1.1
904 : edgomez 1.38 dec->top_field_first = 0;
905 :     dec->alternate_vertical_scan = 0;
906 :    
907 : edgomez 1.14 if (dec->interlacing) {
908 : suxen_drol 1.22 dec->top_field_first = BitstreamGetBit(bs);
909 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "interlace top_field_first %i\n", dec->top_field_first);
910 : suxen_drol 1.22 dec->alternate_vertical_scan = BitstreamGetBit(bs);
911 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "interlace alternate_vertical_scan %i\n", dec->alternate_vertical_scan);
912 :    
913 : h 1.4 }
914 : Isibaar 1.1 }
915 : edgomez 1.14
916 : edgomez 1.38 if ((dec->sprite_enable == SPRITE_STATIC || dec->sprite_enable== SPRITE_GMC) && coding_type == S_VOP) {
917 :    
918 :     int i;
919 :    
920 :     for (i = 0 ; i < dec->sprite_warping_points; i++)
921 :     {
922 :     int length;
923 :     int x = 0, y = 0;
924 :    
925 :     /* sprite code borowed from ffmpeg; thx Michael Niedermayer <michaelni@gmx.at> */
926 :     length = bs_get_spritetrajectory(bs);
927 :     if(length){
928 :     x= BitstreamGetBits(bs, length);
929 :     if ((x >> (length - 1)) == 0) /* if MSB not set it is negative*/
930 :     x = - (x ^ ((1 << length) - 1));
931 :     }
932 :     READ_MARKER();
933 : edgomez 1.42
934 : edgomez 1.38 length = bs_get_spritetrajectory(bs);
935 :     if(length){
936 :     y = BitstreamGetBits(bs, length);
937 :     if ((y >> (length - 1)) == 0) /* if MSB not set it is negative*/
938 :     y = - (y ^ ((1 << length) - 1));
939 :     }
940 :     READ_MARKER();
941 :    
942 :     gmc_warp->duv[i].x = x;
943 :     gmc_warp->duv[i].y = y;
944 :    
945 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER,"sprite_warping_point[%i] xy=(%i,%i)\n", i, x, y);
946 : edgomez 1.38 }
947 :    
948 :     if (dec->sprite_brightness_change)
949 :     {
950 : edgomez 1.42 /* XXX: brightness_change_factor() */
951 : edgomez 1.38 }
952 :     if (dec->sprite_enable == SPRITE_STATIC)
953 :     {
954 : edgomez 1.42 /* XXX: todo */
955 : edgomez 1.38 }
956 :    
957 :     }
958 :    
959 : edgomez 1.42 if ((*quant = BitstreamGetBits(bs, dec->quant_bits)) < 1) /* vop_quant */
960 : Isibaar 1.10 *quant = 1;
961 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "quant %i\n", *quant);
962 : edgomez 1.14
963 :     if (coding_type != I_VOP) {
964 : edgomez 1.42 *fcode_forward = BitstreamGetBits(bs, 3); /* fcode_forward */
965 :     DPRINTF(XVID_DEBUG_HEADER, "fcode_forward %i\n", *fcode_forward);
966 : Isibaar 1.1 }
967 : edgomez 1.14
968 :     if (coding_type == B_VOP) {
969 : edgomez 1.42 *fcode_backward = BitstreamGetBits(bs, 3); /* fcode_backward */
970 :     DPRINTF(XVID_DEBUG_HEADER, "fcode_backward %i\n", *fcode_backward);
971 : chenm001 1.9 }
972 : edgomez 1.14 if (!dec->scalability) {
973 :     if ((dec->shape != VIDOBJLAY_SHAPE_RECTANGULAR) &&
974 :     (coding_type != I_VOP)) {
975 : edgomez 1.42 BitstreamSkip(bs, 1); /* vop_shape_coding_type */
976 : chenm001 1.9 }
977 : Isibaar 1.1 }
978 :     return coding_type;
979 : suxen_drol 1.22
980 : edgomez 1.14 } else if (start_code == USERDATA_START_CODE) {
981 : edgomez 1.38 char tmp[256];
982 :     int i, version, build;
983 :     char packed;
984 :    
985 : edgomez 1.42 BitstreamSkip(bs, 32); /* user_data_start_code */
986 : edgomez 1.38
987 : edgomez 1.46 memset(tmp, 0, 256);
988 : edgomez 1.38 tmp[0] = BitstreamShowBits(bs, 8);
989 : edgomez 1.42
990 : edgomez 1.38 for(i = 1; i < 256; i++){
991 :     tmp[i] = (BitstreamShowBits(bs, 16) & 0xFF);
992 : edgomez 1.42
993 :     if(tmp[i] == 0)
994 : edgomez 1.38 break;
995 : edgomez 1.42
996 : edgomez 1.38 BitstreamSkip(bs, 8);
997 :     }
998 : suxen_drol 1.22
999 : edgomez 1.42 DPRINTF(XVID_DEBUG_STARTCODE, "<user_data>: %s\n", tmp);
1000 :    
1001 : Isibaar 1.40 /* read xvid bitstream version */
1002 :     if(strncmp(tmp, "XviD", 4) == 0) {
1003 : edgomez 1.42 if (tmp[strlen(tmp)-1] == 'C') {
1004 :     sscanf(tmp, "XviD%dC", &dec->bs_version);
1005 :     dec->cartoon_mode = 1;
1006 :     }
1007 :     else
1008 :     sscanf(tmp, "XviD%d", &dec->bs_version);
1009 :    
1010 : edgomez 1.44 DPRINTF(XVID_DEBUG_HEADER, "xvid bitstream version=%i\n", dec->bs_version);
1011 : Isibaar 1.40 }
1012 : suxen_drol 1.22
1013 : edgomez 1.38 /* divx detection */
1014 :     i = sscanf(tmp, "DivX%dBuild%d%c", &version, &build, &packed);
1015 :     if (i < 2)
1016 :     i = sscanf(tmp, "DivX%db%d%c", &version, &build, &packed);
1017 : edgomez 1.42
1018 : edgomez 1.38 if (i >= 2)
1019 :     {
1020 :     dec->packed_mode = (i == 3 && packed == 'p');
1021 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "divx version=%i, build=%i packed=%i\n",
1022 : edgomez 1.38 version, build, dec->packed_mode);
1023 :     }
1024 : suxen_drol 1.22
1025 : edgomez 1.42 } else /* start_code == ? */
1026 : Isibaar 1.1 {
1027 : edgomez 1.14 if (BitstreamShowBits(bs, 24) == 0x000001) {
1028 : edgomez 1.42 DPRINTF(XVID_DEBUG_STARTCODE, "<unknown: %x>\n", BitstreamShowBits(bs, 32));
1029 : Isibaar 1.1 }
1030 :     BitstreamSkip(bs, 8);
1031 :     }
1032 :     }
1033 :    
1034 : edgomez 1.42 #if 0
1035 :     DPRINTF("*** WARNING: no vop_start_code found");
1036 :     #endif
1037 : edgomez 1.14 return -1; /* ignore it */
1038 : Isibaar 1.1 }
1039 :    
1040 :    
1041 :     /* write custom quant matrix */
1042 :    
1043 : edgomez 1.14 static void
1044 :     bs_put_matrix(Bitstream * bs,
1045 : edgomez 1.42 const uint16_t * matrix)
1046 : Isibaar 1.1 {
1047 :     int i, j;
1048 :     const int last = matrix[scan_tables[0][63]];
1049 :    
1050 : suxen_drol 1.18 for (j = 63; j > 0 && matrix[scan_tables[0][j - 1]] == last; j--);
1051 : Isibaar 1.1
1052 : edgomez 1.14 for (i = 0; i <= j; i++) {
1053 : Isibaar 1.1 BitstreamPutBits(bs, matrix[scan_tables[0][i]], 8);
1054 :     }
1055 :    
1056 : edgomez 1.14 if (j < 63) {
1057 : Isibaar 1.1 BitstreamPutBits(bs, 0, 8);
1058 :     }
1059 :     }
1060 :    
1061 :    
1062 :     /*
1063 :     write vol header
1064 :     */
1065 : edgomez 1.14 void
1066 :     BitstreamWriteVolHeader(Bitstream * const bs,
1067 :     const MBParam * pParam,
1068 : edgomez 1.38 const FRAMEINFO * const frame)
1069 : Isibaar 1.1 {
1070 : edgomez 1.38 static const unsigned int vo_id = 0;
1071 :     static const unsigned int vol_id = 0;
1072 : edgomez 1.42 int vol_ver_id = 1;
1073 :     int vol_type_ind = VIDOBJLAY_TYPE_SIMPLE;
1074 :     int vol_profile = pParam->profile;
1075 :    
1076 :     if ( (pParam->vol_flags & XVID_VOL_QUARTERPEL) ||
1077 : Isibaar 1.54 (pParam->vol_flags & XVID_VOL_GMC))
1078 : edgomez 1.38 vol_ver_id = 2;
1079 :    
1080 : suxen_drol 1.50 if ((pParam->vol_flags & (XVID_VOL_MPEGQUANT|XVID_VOL_QUARTERPEL|XVID_VOL_GMC|XVID_VOL_INTERLACING)) ||
1081 :     pParam->max_bframes>0) {
1082 : edgomez 1.42 vol_type_ind = VIDOBJLAY_TYPE_ASP;
1083 :     }
1084 : edgomez 1.38
1085 : edgomez 1.42 /* visual_object_sequence_start_code */
1086 :     #if 0
1087 :     BitstreamPad(bs);
1088 :     #endif
1089 : edgomez 1.38
1090 : edgomez 1.42 /*
1091 :     * no padding here, anymore. You have to make sure that you are
1092 :     * byte aligned, and that always 1-8 padding bits have been written
1093 :     */
1094 : edgomez 1.38
1095 : edgomez 1.42 if (!vol_profile) {
1096 :     /* Profile was not set by client app, use the more permissive profile
1097 :     * compatible with the vol_type_id */
1098 :     switch(vol_type_ind) {
1099 :     case VIDOBJLAY_TYPE_ASP:
1100 :     vol_profile = 0xf5; /* ASP level 5 */
1101 :     break;
1102 :     case VIDOBJLAY_TYPE_ART_SIMPLE:
1103 :     vol_profile = 0x94; /* ARTS level 4 */
1104 :     break;
1105 :     default:
1106 :     vol_profile = 0x03; /* Simple level 3 */
1107 :     break;
1108 :     }
1109 :     }
1110 :    
1111 :     /* Write the VOS header */
1112 : edgomez 1.38 BitstreamPutBits(bs, VISOBJSEQ_START_CODE, 32);
1113 : edgomez 1.42 BitstreamPutBits(bs, vol_profile, 8); /* profile_and_level_indication */
1114 : edgomez 1.38
1115 : edgomez 1.42
1116 :     /* visual_object_start_code */
1117 : edgomez 1.38 BitstreamPad(bs);
1118 :     BitstreamPutBits(bs, VISOBJ_START_CODE, 32);
1119 : edgomez 1.42 BitstreamPutBits(bs, 0, 1); /* is_visual_object_identifier */
1120 : edgomez 1.41
1121 :     /* Video type */
1122 : edgomez 1.42 BitstreamPutBits(bs, VISOBJ_TYPE_VIDEO, 4); /* visual_object_type */
1123 : edgomez 1.41 BitstreamPutBit(bs, 0); /* video_signal_type */
1124 :    
1125 : edgomez 1.42 /* video object_start_code & vo_id */
1126 :     BitstreamPadAlways(bs); /* next_start_code() */
1127 : edgomez 1.38 BitstreamPutBits(bs, VIDOBJ_START_CODE|(vo_id&0x5), 32);
1128 : Isibaar 1.1
1129 : edgomez 1.42 /* video_object_layer_start_code & vol_id */
1130 : edgomez 1.38 BitstreamPad(bs);
1131 :     BitstreamPutBits(bs, VIDOBJLAY_START_CODE|(vol_id&0x4), 32);
1132 : Isibaar 1.1
1133 : edgomez 1.42 BitstreamPutBit(bs, 0); /* random_accessible_vol */
1134 :     BitstreamPutBits(bs, vol_type_ind, 8); /* video_object_type_indication */
1135 : suxen_drol 1.12
1136 : edgomez 1.42 if (vol_ver_id == 1) {
1137 :     BitstreamPutBit(bs, 0); /* is_object_layer_identified (0=not given) */
1138 :     } else {
1139 :     BitstreamPutBit(bs, 1); /* is_object_layer_identified */
1140 :     BitstreamPutBits(bs, vol_ver_id, 4); /* vol_ver_id == 2 */
1141 :     BitstreamPutBits(bs, 4, 3); /* vol_ver_priority (1==highest, 7==lowest) */
1142 :     }
1143 :    
1144 :     /* Aspect ratio */
1145 :     BitstreamPutBits(bs, pParam->par, 4); /* aspect_ratio_info (1=1:1) */
1146 :     if(pParam->par == XVID_PAR_EXT) {
1147 :     BitstreamPutBits(bs, pParam->par_width, 8);
1148 :     BitstreamPutBits(bs, pParam->par_height, 8);
1149 : edgomez 1.38 }
1150 : chl 1.28
1151 : edgomez 1.42 BitstreamPutBit(bs, 1); /* vol_control_parameters */
1152 :     BitstreamPutBits(bs, 1, 2); /* chroma_format 1="4:2:0" */
1153 : suxen_drol 1.12
1154 : edgomez 1.38 if (pParam->max_bframes > 0) {
1155 : edgomez 1.42 BitstreamPutBit(bs, 0); /* low_delay */
1156 : edgomez 1.38 } else
1157 :     {
1158 : edgomez 1.42 BitstreamPutBit(bs, 1); /* low_delay */
1159 : edgomez 1.38 }
1160 : edgomez 1.42 BitstreamPutBit(bs, 0); /* vbv_parameters (0=not given) */
1161 : edgomez 1.38
1162 : edgomez 1.42 BitstreamPutBits(bs, 0, 2); /* video_object_layer_shape (0=rectangular) */
1163 : Isibaar 1.1
1164 :     WRITE_MARKER();
1165 : edgomez 1.14
1166 : edgomez 1.42 /*
1167 :     * time_inc_resolution; ignored by current decore versions
1168 :     * eg. 2fps res=2 inc=1
1169 :     * 25fps res=25 inc=1
1170 :     * 29.97fps res=30000 inc=1001
1171 : edgomez 1.14 */
1172 : suxen_drol 1.11 BitstreamPutBits(bs, pParam->fbase, 16);
1173 : edgomez 1.31
1174 : Isibaar 1.1 WRITE_MARKER();
1175 :    
1176 : Isibaar 1.53 if (pParam->fincr>0) {
1177 :     BitstreamPutBit(bs, 1); /* fixed_vop_rate = 1 */
1178 :     BitstreamPutBits(bs, pParam->fincr, MAX(log2bin(pParam->fbase-1),1)); /* fixed_vop_time_increment */
1179 :     }else{
1180 :     BitstreamPutBit(bs, 0); /* fixed_vop_rate = 0 */
1181 :     }
1182 : Isibaar 1.1
1183 :     WRITE_MARKER();
1184 : edgomez 1.42 BitstreamPutBits(bs, pParam->width, 13); /* width */
1185 : Isibaar 1.1 WRITE_MARKER();
1186 : edgomez 1.42 BitstreamPutBits(bs, pParam->height, 13); /* height */
1187 : Isibaar 1.1 WRITE_MARKER();
1188 : edgomez 1.14
1189 : edgomez 1.42 BitstreamPutBit(bs, pParam->vol_flags & XVID_VOL_INTERLACING); /* interlace */
1190 :     BitstreamPutBit(bs, 1); /* obmc_disable (overlapped block motion compensation) */
1191 : edgomez 1.38
1192 : edgomez 1.42 if (vol_ver_id != 1)
1193 :     { if ((pParam->vol_flags & XVID_VOL_GMC))
1194 :     { BitstreamPutBits(bs, 2, 2); /* sprite_enable=='GMC' */
1195 :     BitstreamPutBits(bs, 3, 6); /* no_of_sprite_warping_points */
1196 :     BitstreamPutBits(bs, 3, 2); /* sprite_warping_accuracy 0==1/2, 1=1/4, 2=1/8, 3=1/16 */
1197 :     BitstreamPutBit(bs, 0); /* sprite_brightness_change (not supported) */
1198 :    
1199 :     /*
1200 :     * currently we use no_of_sprite_warping_points==2, sprite_warping_accuracy==3
1201 :     * for DivX5 compatability
1202 :     */
1203 : edgomez 1.38
1204 :     } else
1205 : edgomez 1.42 BitstreamPutBits(bs, 0, 2); /* sprite_enable==off */
1206 : edgomez 1.38 }
1207 :     else
1208 : edgomez 1.42 BitstreamPutBit(bs, 0); /* sprite_enable==off */
1209 : edgomez 1.38
1210 : edgomez 1.42 BitstreamPutBit(bs, 0); /* not_8_bit */
1211 : Isibaar 1.1
1212 : edgomez 1.42 /* quant_type 0=h.263 1=mpeg4(quantizer tables) */
1213 :     BitstreamPutBit(bs, pParam->vol_flags & XVID_VOL_MPEGQUANT);
1214 : edgomez 1.14
1215 : edgomez 1.42 if ((pParam->vol_flags & XVID_VOL_MPEGQUANT)) {
1216 :     BitstreamPutBit(bs, is_custom_intra_matrix(pParam->mpeg_quant_matrices)); /* load_intra_quant_mat */
1217 :     if(is_custom_intra_matrix(pParam->mpeg_quant_matrices))
1218 :     bs_put_matrix(bs, get_intra_matrix(pParam->mpeg_quant_matrices));
1219 : Isibaar 1.1
1220 : edgomez 1.42 BitstreamPutBit(bs, is_custom_inter_matrix(pParam->mpeg_quant_matrices)); /* load_inter_quant_mat */
1221 :     if(is_custom_inter_matrix(pParam->mpeg_quant_matrices))
1222 :     bs_put_matrix(bs, get_inter_matrix(pParam->mpeg_quant_matrices));
1223 : Isibaar 1.1 }
1224 :    
1225 : edgomez 1.38 if (vol_ver_id != 1) {
1226 : edgomez 1.42 if ((pParam->vol_flags & XVID_VOL_QUARTERPEL))
1227 :     BitstreamPutBit(bs, 1); /* quarterpel */
1228 : edgomez 1.38 else
1229 : edgomez 1.42 BitstreamPutBit(bs, 0); /* no quarterpel */
1230 : edgomez 1.38 }
1231 :    
1232 : edgomez 1.42 BitstreamPutBit(bs, 1); /* complexity_estimation_disable */
1233 :     BitstreamPutBit(bs, 1); /* resync_marker_disable */
1234 :     BitstreamPutBit(bs, 0); /* data_partitioned */
1235 : edgomez 1.38
1236 : edgomez 1.42 if (vol_ver_id != 1) {
1237 :     BitstreamPutBit(bs, 0); /* newpred_enable */
1238 : Isibaar 1.54 BitstreamPutBit(bs, 0); /* reduced_resolution_vop_enabled */
1239 : edgomez 1.38 }
1240 :    
1241 : edgomez 1.42 BitstreamPutBit(bs, 0); /* scalability */
1242 :    
1243 :     BitstreamPadAlways(bs); /* next_start_code(); */
1244 : edgomez 1.41
1245 : suxen_drol 1.49 /* divx5 userdata string */
1246 : Skal 1.52 #define DIVX5_ID ((char *)"DivX503b1393")
1247 : suxen_drol 1.49 if ((pParam->global_flags & XVID_GLOBAL_DIVX5_USERDATA)) {
1248 :     BitstreamWriteUserData(bs, DIVX5_ID, strlen(DIVX5_ID));
1249 :     if (pParam->max_bframes > 0 && (pParam->global_flags & XVID_GLOBAL_PACKED))
1250 :     BitstreamPutBits(bs, 'p', 8);
1251 : edgomez 1.38 }
1252 :    
1253 :     /* xvid id */
1254 : edgomez 1.42 {
1255 : edgomez 1.43 const char xvid_user_format[] = "XviD%04d%c";
1256 :     char xvid_user_data[100];
1257 :     sprintf(xvid_user_data,
1258 :     xvid_user_format,
1259 :     XVID_BS_VERSION,
1260 :     (frame->vop_flags & XVID_VOP_CARTOON)?'C':'\0');
1261 :     BitstreamWriteUserData(bs, xvid_user_data, strlen(xvid_user_data));
1262 : edgomez 1.42 }
1263 : Isibaar 1.1 }
1264 :    
1265 :    
1266 :     /*
1267 :     write vop header
1268 :     */
1269 : edgomez 1.14 void
1270 : edgomez 1.38 BitstreamWriteVopHeader(
1271 :     Bitstream * const bs,
1272 : edgomez 1.14 const MBParam * pParam,
1273 : edgomez 1.38 const FRAMEINFO * const frame,
1274 : edgomez 1.42 int vop_coded,
1275 :     unsigned int quant)
1276 : Isibaar 1.1 {
1277 : suxen_drol 1.8 uint32_t i;
1278 : chl 1.28
1279 : edgomez 1.42 #if 0
1280 :     BitstreamPad(bs);
1281 :     #endif
1282 :    
1283 :     /*
1284 :     * no padding here, anymore. You have to make sure that you are
1285 :     * byte aligned, and that always 1-8 padding bits have been written
1286 :     */
1287 : edgomez 1.38
1288 : edgomez 1.14 BitstreamPutBits(bs, VOP_START_CODE, 32);
1289 :    
1290 :     BitstreamPutBits(bs, frame->coding_type, 2);
1291 : edgomez 1.42 #if 0
1292 :     DPRINTF(XVID_DEBUG_HEADER, "coding_type = %i\n", frame->coding_type);
1293 :     #endif
1294 : Isibaar 1.1
1295 : chl 1.28 for (i = 0; i < frame->seconds; i++) {
1296 :     BitstreamPutBit(bs, 1);
1297 :     }
1298 :     BitstreamPutBit(bs, 0);
1299 : Isibaar 1.1
1300 :     WRITE_MARKER();
1301 :    
1302 : edgomez 1.42 /* time_increment: value=nth_of_sec, nbits = log2(resolution) */
1303 : edgomez 1.43 BitstreamPutBits(bs, frame->ticks, MAX(log2bin(pParam->fbase-1), 1));
1304 : edgomez 1.42 #if 0
1305 :     DPRINTF("[%i:%i] %c",
1306 :     frame->seconds, frame->ticks,
1307 :     frame->coding_type == I_VOP ? 'I' :
1308 :     frame->coding_type == P_VOP ? 'P' :
1309 :     frame->coding_type == S_VOP ? 'S' : 'B');
1310 :     #endif
1311 : Isibaar 1.1
1312 :     WRITE_MARKER();
1313 :    
1314 : suxen_drol 1.17 if (!vop_coded) {
1315 :     BitstreamPutBits(bs, 0, 1);
1316 : edgomez 1.41 #if 0
1317 :     BitstreamPadAlways(bs); /* next_start_code() */
1318 :     #endif
1319 :     /* NB: It's up to the function caller to write the next_start_code().
1320 :     * At the moment encoder.c respects that requisite because a VOP
1321 :     * always ends with a next_start_code either if it's coded or not
1322 :     * and encoder.c terminates a frame with a next_start_code in whatever
1323 :     * case */
1324 : suxen_drol 1.17 return;
1325 :     }
1326 :    
1327 : edgomez 1.42 BitstreamPutBits(bs, 1, 1); /* vop_coded */
1328 : Isibaar 1.1
1329 : edgomez 1.38 if ( (frame->coding_type == P_VOP) || (frame->coding_type == S_VOP) )
1330 : suxen_drol 1.7 BitstreamPutBits(bs, frame->rounding_type, 1);
1331 : Isibaar 1.1
1332 : edgomez 1.42 BitstreamPutBits(bs, 0, 3); /* intra_dc_vlc_threshold */
1333 : edgomez 1.14
1334 : edgomez 1.42 if ((frame->vol_flags & XVID_VOL_INTERLACING)) {
1335 :     BitstreamPutBit(bs, (frame->vop_flags & XVID_VOP_TOPFIELDFIRST));
1336 :     BitstreamPutBit(bs, (frame->vop_flags & XVID_VOP_ALTERNATESCAN));
1337 : edgomez 1.38 }
1338 : edgomez 1.42
1339 : edgomez 1.38 if (frame->coding_type == S_VOP) {
1340 : edgomez 1.42 if (1) { /* no_of_sprite_warping_points>=1 (we use 2!) */
1341 : edgomez 1.38 int k;
1342 : edgomez 1.42 for (k=0;k<3;k++)
1343 : edgomez 1.38 {
1344 : edgomez 1.42 bs_put_spritetrajectory(bs, frame->warp.duv[k].x ); /* du[k] */
1345 : edgomez 1.38 WRITE_MARKER();
1346 : edgomez 1.42
1347 :     bs_put_spritetrajectory(bs, frame->warp.duv[k].y ); /* dv[k] */
1348 : edgomez 1.38 WRITE_MARKER();
1349 :    
1350 : edgomez 1.42 if ((frame->vol_flags & XVID_VOL_QUARTERPEL))
1351 : edgomez 1.38 {
1352 : 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);
1353 : edgomez 1.38 }
1354 :     else
1355 :     {
1356 : 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);
1357 : edgomez 1.38 }
1358 :     }
1359 :     }
1360 : h 1.4 }
1361 :    
1362 : edgomez 1.38
1363 : edgomez 1.42 #if 0
1364 :     DPRINTF(XVID_DEBUG_HEADER, "quant = %i\n", quant);
1365 :     #endif
1366 :    
1367 :     BitstreamPutBits(bs, quant, 5); /* quantizer */
1368 : edgomez 1.14
1369 : suxen_drol 1.7 if (frame->coding_type != I_VOP)
1370 : edgomez 1.42 BitstreamPutBits(bs, frame->fcode, 3); /* forward_fixed_code */
1371 : suxen_drol 1.8
1372 :     if (frame->coding_type == B_VOP)
1373 : edgomez 1.42 BitstreamPutBits(bs, frame->bcode, 3); /* backward_fixed_code */
1374 : edgomez 1.38
1375 :     }
1376 :    
1377 : edgomez 1.42 void
1378 :     BitstreamWriteUserData(Bitstream * const bs,
1379 : Skal 1.52 const char *data,
1380 :     const unsigned int length)
1381 : edgomez 1.38 {
1382 :     int i;
1383 :    
1384 :     BitstreamPad(bs);
1385 :     BitstreamPutBits(bs, USERDATA_START_CODE, 32);
1386 :    
1387 :     for (i = 0; i < length; i++) {
1388 :     BitstreamPutBits(bs, data[i], 8);
1389 :     }
1390 : suxen_drol 1.17
1391 : chl 1.24 }
1392 : Skal 1.51
1393 :     /*
1394 :     * Group of VOP
1395 :     */
1396 :     void
1397 :     BitstreamWriteGroupOfVopHeader(Bitstream * const bs,
1398 :     const MBParam * pParam,
1399 :     uint32_t is_closed_gov)
1400 :     {
1401 :     int64_t time = (pParam->m_stamp + (pParam->fbase/2)) / pParam->fbase;
1402 :     int hours, minutes, seconds;
1403 :    
1404 :     /* compute time_code */
1405 :     seconds = time % 60; time /= 60;
1406 :     minutes = time % 60; time /= 60;
1407 :     hours = time % 24; /* don't overflow */
1408 :    
1409 :     BitstreamPutBits(bs, GRPOFVOP_START_CODE, 32);
1410 :     BitstreamPutBits(bs, hours, 5);
1411 :     BitstreamPutBits(bs, minutes, 6);
1412 :     BitstreamPutBit(bs, 1);
1413 :     BitstreamPutBits(bs, seconds, 6);
1414 :     BitstreamPutBits(bs, is_closed_gov, 1);
1415 :     BitstreamPutBits(bs, 0, 1); /* broken_link */
1416 :     }
1417 :    
1418 :     /*
1419 :     * End of Sequence
1420 :     */
1421 :     void
1422 :     BitstreamWriteEndOfSequence(Bitstream * const bs)
1423 :     {
1424 :     BitstreamPadAlways(bs);
1425 :     BitstreamPutBits(bs, VISOBJSEQ_STOP_CODE, 32);
1426 :     }
1427 :    
1428 :     /*
1429 :     * Video Packet (resync marker)
1430 :     */
1431 :    
1432 :     void write_video_packet_header(Bitstream * const bs,
1433 :     const MBParam * pParam,
1434 :     const FRAMEINFO * const frame,
1435 :     int mbnum)
1436 :     {
1437 :     const int mbnum_bits = log2bin(pParam->mb_width * pParam->mb_height - 1);
1438 :     uint32_t nbitsresyncmarker;
1439 : Skal 1.52
1440 :     if (frame->coding_type == I_VOP)
1441 :     nbitsresyncmarker = NUMBITS_VP_RESYNC_MARKER; /* 16 zeros followed by a 1. */
1442 :     else if (frame->coding_type == P_VOP)
1443 :     nbitsresyncmarker = NUMBITS_VP_RESYNC_MARKER-1 + frame->fcode;
1444 :     else /* B_VOP */
1445 :     nbitsresyncmarker = MAX(NUMBITS_VP_RESYNC_MARKER, NUMBITS_VP_RESYNC_MARKER-1 + MAX(frame->fcode, frame->bcode));
1446 :    
1447 : Skal 1.51 BitstreamPadAlways(bs);
1448 :     BitstreamPutBits(bs, RESYNC_MARKER, nbitsresyncmarker);
1449 :     BitstreamPutBits(bs, mbnum, mbnum_bits);
1450 :     BitstreamPutBits(bs, frame->quant, 5);
1451 :     BitstreamPutBit(bs, 0); /* hec */
1452 :     }
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