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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 :     * $Id$
24 :     *
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 : edgomez 1.42 i--; /* fix little bug at coeff not full */
75 : edgomez 1.14
76 :     while (i < 64) {
77 :     matrix[scan_tables[0][i++]] = last;
78 :     }
79 :     }
80 : Isibaar 1.2
81 : suxen_drol 1.21
82 :    
83 : edgomez 1.42 /*
84 :     * for PVOP addbits == fcode - 1
85 :     * for BVOP addbits == max(fcode,bcode) - 1
86 :     * returns mbpos
87 :     */
88 : suxen_drol 1.21 int
89 : edgomez 1.42 read_video_packet_header(Bitstream *bs,
90 :     DECODER * dec,
91 :     const int addbits,
92 :     int * quant,
93 : edgomez 1.38 int * fcode_forward,
94 :     int * fcode_backward,
95 :     int * intra_dc_threshold)
96 : suxen_drol 1.21 {
97 : edgomez 1.38 int startcode_bits = NUMBITS_VP_RESYNC_MARKER + addbits;
98 :     int mbnum_bits = log2bin(dec->mb_width * dec->mb_height - 1);
99 : suxen_drol 1.21 int mbnum;
100 : edgomez 1.38 int hec = 0;
101 : suxen_drol 1.21
102 :     BitstreamSkip(bs, BitstreamNumBitsToByteAlign(bs));
103 : edgomez 1.38 BitstreamSkip(bs, startcode_bits);
104 : suxen_drol 1.21
105 : edgomez 1.42 DPRINTF(XVID_DEBUG_STARTCODE, "<video_packet_header>\n");
106 : suxen_drol 1.22
107 : edgomez 1.38 if (dec->shape != VIDOBJLAY_SHAPE_RECTANGULAR)
108 :     {
109 :     hec = BitstreamGetBit(bs); /* header_extension_code */
110 : edgomez 1.42 if (hec && !(dec->sprite_enable == SPRITE_STATIC /* && current_coding_type = I_VOP */))
111 : edgomez 1.38 {
112 :     BitstreamSkip(bs, 13); /* vop_width */
113 :     READ_MARKER();
114 :     BitstreamSkip(bs, 13); /* vop_height */
115 :     READ_MARKER();
116 :     BitstreamSkip(bs, 13); /* vop_horizontal_mc_spatial_ref */
117 :     READ_MARKER();
118 :     BitstreamSkip(bs, 13); /* vop_vertical_mc_spatial_ref */
119 :     READ_MARKER();
120 :     }
121 :     }
122 :    
123 :     mbnum = BitstreamGetBits(bs, mbnum_bits); /* macroblock_number */
124 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "mbnum %i\n", mbnum);
125 : suxen_drol 1.21
126 : edgomez 1.38 if (dec->shape != VIDOBJLAY_SHAPE_BINARY_ONLY)
127 :     {
128 : edgomez 1.42 *quant = BitstreamGetBits(bs, dec->quant_bits); /* quant_scale */
129 :     DPRINTF(XVID_DEBUG_HEADER, "quant %i\n", *quant);
130 : edgomez 1.38 }
131 : suxen_drol 1.21
132 : edgomez 1.38 if (dec->shape == VIDOBJLAY_SHAPE_RECTANGULAR)
133 :     hec = BitstreamGetBit(bs); /* header_extension_code */
134 : suxen_drol 1.21
135 :    
136 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "header_extension_code %i\n", hec);
137 : edgomez 1.38 if (hec)
138 :     {
139 :     int time_base;
140 :     int time_increment;
141 :     int coding_type;
142 :    
143 :     for (time_base=0; BitstreamGetBit(bs)!=0; time_base++); /* modulo_time_base */
144 :     READ_MARKER();
145 :     if (dec->time_inc_bits)
146 :     time_increment = (BitstreamGetBits(bs, dec->time_inc_bits)); /* vop_time_increment */
147 :     READ_MARKER();
148 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER,"time %i:%i\n", time_base, time_increment);
149 : edgomez 1.38
150 :     coding_type = BitstreamGetBits(bs, 2);
151 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER,"coding_type %i\n", coding_type);
152 :    
153 : edgomez 1.38 if (dec->shape != VIDOBJLAY_SHAPE_RECTANGULAR)
154 :     {
155 :     BitstreamSkip(bs, 1); /* change_conv_ratio_disable */
156 :     if (coding_type != I_VOP)
157 :     BitstreamSkip(bs, 1); /* vop_shape_coding_type */
158 :     }
159 :    
160 :     if (dec->shape != VIDOBJLAY_SHAPE_BINARY_ONLY)
161 :     {
162 :     *intra_dc_threshold = intra_dc_threshold_table[BitstreamGetBits(bs, 3)];
163 :    
164 :     if (dec->sprite_enable == SPRITE_GMC && coding_type == S_VOP &&
165 :     dec->sprite_warping_points > 0)
166 :     {
167 : edgomez 1.42 /* TODO: sprite trajectory */
168 : edgomez 1.38 }
169 : edgomez 1.42 if (dec->reduced_resolution_enable &&
170 : edgomez 1.38 dec->shape == VIDOBJLAY_SHAPE_RECTANGULAR &&
171 :     (coding_type == P_VOP || coding_type == I_VOP))
172 :     {
173 :     BitstreamSkip(bs, 1); /* XXX: vop_reduced_resolution */
174 :     }
175 :    
176 :     if (coding_type != I_VOP && fcode_forward)
177 :     {
178 :     *fcode_forward = BitstreamGetBits(bs, 3);
179 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER,"fcode_forward %i\n", *fcode_forward);
180 : edgomez 1.38 }
181 :    
182 :     if (coding_type == B_VOP && fcode_backward)
183 :     {
184 :     *fcode_backward = BitstreamGetBits(bs, 3);
185 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER,"fcode_backward %i\n", *fcode_backward);
186 : edgomez 1.38 }
187 :     }
188 :    
189 :     }
190 :    
191 :     if (dec->newpred_enable)
192 :     {
193 :     int vop_id;
194 :     int vop_id_for_prediction;
195 : edgomez 1.42
196 : edgomez 1.38 vop_id = BitstreamGetBits(bs, MIN(dec->time_inc_bits + 3, 15));
197 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "vop_id %i\n", vop_id);
198 : edgomez 1.38 if (BitstreamGetBit(bs)) /* vop_id_for_prediction_indication */
199 :     {
200 :     vop_id_for_prediction = BitstreamGetBits(bs, MIN(dec->time_inc_bits + 3, 15));
201 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "vop_id_for_prediction %i\n", vop_id_for_prediction);
202 : edgomez 1.38 }
203 :     READ_MARKER();
204 :     }
205 : suxen_drol 1.21
206 :     return mbnum;
207 :     }
208 :    
209 :    
210 :    
211 : edgomez 1.38
212 :     /* vol estimation header */
213 :     static void
214 :     read_vol_complexity_estimation_header(Bitstream * bs, DECODER * dec)
215 :     {
216 :     ESTIMATION * e = &dec->estimation;
217 :    
218 :     e->method = BitstreamGetBits(bs, 2); /* estimation_method */
219 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER,"+ complexity_estimation_header; method=%i\n", e->method);
220 : edgomez 1.38
221 : edgomez 1.42 if (e->method == 0 || e->method == 1)
222 : edgomez 1.38 {
223 :     if (!BitstreamGetBit(bs)) /* shape_complexity_estimation_disable */
224 :     {
225 :     e->opaque = BitstreamGetBit(bs); /* opaque */
226 :     e->transparent = BitstreamGetBit(bs); /* transparent */
227 :     e->intra_cae = BitstreamGetBit(bs); /* intra_cae */
228 :     e->inter_cae = BitstreamGetBit(bs); /* inter_cae */
229 :     e->no_update = BitstreamGetBit(bs); /* no_update */
230 :     e->upsampling = BitstreamGetBit(bs); /* upsampling */
231 :     }
232 :    
233 :     if (!BitstreamGetBit(bs)) /* texture_complexity_estimation_set_1_disable */
234 :     {
235 :     e->intra_blocks = BitstreamGetBit(bs); /* intra_blocks */
236 :     e->inter_blocks = BitstreamGetBit(bs); /* inter_blocks */
237 :     e->inter4v_blocks = BitstreamGetBit(bs); /* inter4v_blocks */
238 :     e->not_coded_blocks = BitstreamGetBit(bs); /* not_coded_blocks */
239 :     }
240 :     }
241 :    
242 :     READ_MARKER();
243 :    
244 :     if (!BitstreamGetBit(bs)) /* texture_complexity_estimation_set_2_disable */
245 :     {
246 :     e->dct_coefs = BitstreamGetBit(bs); /* dct_coefs */
247 :     e->dct_lines = BitstreamGetBit(bs); /* dct_lines */
248 :     e->vlc_symbols = BitstreamGetBit(bs); /* vlc_symbols */
249 :     e->vlc_bits = BitstreamGetBit(bs); /* vlc_bits */
250 :     }
251 :    
252 :     if (!BitstreamGetBit(bs)) /* motion_compensation_complexity_disable */
253 :     {
254 :     e->apm = BitstreamGetBit(bs); /* apm */
255 :     e->npm = BitstreamGetBit(bs); /* npm */
256 :     e->interpolate_mc_q = BitstreamGetBit(bs); /* interpolate_mc_q */
257 :     e->forw_back_mc_q = BitstreamGetBit(bs); /* forw_back_mc_q */
258 :     e->halfpel2 = BitstreamGetBit(bs); /* halfpel2 */
259 :     e->halfpel4 = BitstreamGetBit(bs); /* halfpel4 */
260 :     }
261 :    
262 :     READ_MARKER();
263 :    
264 :     if (e->method == 1)
265 :     {
266 :     if (!BitstreamGetBit(bs)) /* version2_complexity_estimation_disable */
267 :     {
268 :     e->sadct = BitstreamGetBit(bs); /* sadct */
269 :     e->quarterpel = BitstreamGetBit(bs); /* quarterpel */
270 :     }
271 :     }
272 :     }
273 :    
274 :    
275 :     /* vop estimation header */
276 :     static void
277 :     read_vop_complexity_estimation_header(Bitstream * bs, DECODER * dec, int coding_type)
278 :     {
279 :     ESTIMATION * e = &dec->estimation;
280 :    
281 :     if (e->method == 0 || e->method == 1)
282 :     {
283 :     if (coding_type == I_VOP) {
284 :     if (e->opaque) BitstreamSkip(bs, 8); /* dcecs_opaque */
285 :     if (e->transparent) BitstreamSkip(bs, 8); /* */
286 :     if (e->intra_cae) BitstreamSkip(bs, 8); /* */
287 :     if (e->inter_cae) BitstreamSkip(bs, 8); /* */
288 :     if (e->no_update) BitstreamSkip(bs, 8); /* */
289 :     if (e->upsampling) BitstreamSkip(bs, 8); /* */
290 :     if (e->intra_blocks) BitstreamSkip(bs, 8); /* */
291 :     if (e->not_coded_blocks) BitstreamSkip(bs, 8); /* */
292 :     if (e->dct_coefs) BitstreamSkip(bs, 8); /* */
293 :     if (e->dct_lines) BitstreamSkip(bs, 8); /* */
294 :     if (e->vlc_symbols) BitstreamSkip(bs, 8); /* */
295 :     if (e->vlc_bits) BitstreamSkip(bs, 8); /* */
296 :     if (e->sadct) BitstreamSkip(bs, 8); /* */
297 :     }
298 : edgomez 1.42
299 : edgomez 1.38 if (coding_type == P_VOP) {
300 :     if (e->opaque) BitstreamSkip(bs, 8); /* */
301 :     if (e->transparent) BitstreamSkip(bs, 8); /* */
302 :     if (e->intra_cae) BitstreamSkip(bs, 8); /* */
303 :     if (e->inter_cae) BitstreamSkip(bs, 8); /* */
304 :     if (e->no_update) BitstreamSkip(bs, 8); /* */
305 :     if (e->upsampling) BitstreamSkip(bs, 8); /* */
306 :     if (e->intra_blocks) BitstreamSkip(bs, 8); /* */
307 :     if (e->not_coded_blocks) BitstreamSkip(bs, 8); /* */
308 :     if (e->dct_coefs) BitstreamSkip(bs, 8); /* */
309 :     if (e->dct_lines) BitstreamSkip(bs, 8); /* */
310 :     if (e->vlc_symbols) BitstreamSkip(bs, 8); /* */
311 :     if (e->vlc_bits) BitstreamSkip(bs, 8); /* */
312 :     if (e->inter_blocks) BitstreamSkip(bs, 8); /* */
313 :     if (e->inter4v_blocks) BitstreamSkip(bs, 8); /* */
314 :     if (e->apm) BitstreamSkip(bs, 8); /* */
315 :     if (e->npm) BitstreamSkip(bs, 8); /* */
316 :     if (e->forw_back_mc_q) BitstreamSkip(bs, 8); /* */
317 :     if (e->halfpel2) BitstreamSkip(bs, 8); /* */
318 :     if (e->halfpel4) BitstreamSkip(bs, 8); /* */
319 :     if (e->sadct) BitstreamSkip(bs, 8); /* */
320 :     if (e->quarterpel) BitstreamSkip(bs, 8); /* */
321 :     }
322 :     if (coding_type == B_VOP) {
323 :     if (e->opaque) BitstreamSkip(bs, 8); /* */
324 :     if (e->transparent) BitstreamSkip(bs, 8); /* */
325 :     if (e->intra_cae) BitstreamSkip(bs, 8); /* */
326 :     if (e->inter_cae) BitstreamSkip(bs, 8); /* */
327 :     if (e->no_update) BitstreamSkip(bs, 8); /* */
328 :     if (e->upsampling) BitstreamSkip(bs, 8); /* */
329 :     if (e->intra_blocks) BitstreamSkip(bs, 8); /* */
330 :     if (e->not_coded_blocks) BitstreamSkip(bs, 8); /* */
331 :     if (e->dct_coefs) BitstreamSkip(bs, 8); /* */
332 :     if (e->dct_lines) BitstreamSkip(bs, 8); /* */
333 :     if (e->vlc_symbols) BitstreamSkip(bs, 8); /* */
334 :     if (e->vlc_bits) BitstreamSkip(bs, 8); /* */
335 :     if (e->inter_blocks) BitstreamSkip(bs, 8); /* */
336 :     if (e->inter4v_blocks) BitstreamSkip(bs, 8); /* */
337 :     if (e->apm) BitstreamSkip(bs, 8); /* */
338 :     if (e->npm) BitstreamSkip(bs, 8); /* */
339 :     if (e->forw_back_mc_q) BitstreamSkip(bs, 8); /* */
340 :     if (e->halfpel2) BitstreamSkip(bs, 8); /* */
341 :     if (e->halfpel4) BitstreamSkip(bs, 8); /* */
342 :     if (e->interpolate_mc_q) BitstreamSkip(bs, 8); /* */
343 :     if (e->sadct) BitstreamSkip(bs, 8); /* */
344 :     if (e->quarterpel) BitstreamSkip(bs, 8); /* */
345 :     }
346 :    
347 :     if (coding_type == S_VOP && dec->sprite_enable == SPRITE_STATIC) {
348 :     if (e->intra_blocks) BitstreamSkip(bs, 8); /* */
349 :     if (e->not_coded_blocks) BitstreamSkip(bs, 8); /* */
350 :     if (e->dct_coefs) BitstreamSkip(bs, 8); /* */
351 :     if (e->dct_lines) BitstreamSkip(bs, 8); /* */
352 :     if (e->vlc_symbols) BitstreamSkip(bs, 8); /* */
353 :     if (e->vlc_bits) BitstreamSkip(bs, 8); /* */
354 :     if (e->inter_blocks) BitstreamSkip(bs, 8); /* */
355 :     if (e->inter4v_blocks) BitstreamSkip(bs, 8); /* */
356 :     if (e->apm) BitstreamSkip(bs, 8); /* */
357 :     if (e->npm) BitstreamSkip(bs, 8); /* */
358 :     if (e->forw_back_mc_q) BitstreamSkip(bs, 8); /* */
359 :     if (e->halfpel2) BitstreamSkip(bs, 8); /* */
360 :     if (e->halfpel4) BitstreamSkip(bs, 8); /* */
361 :     if (e->interpolate_mc_q) BitstreamSkip(bs, 8); /* */
362 :     }
363 :     }
364 :     }
365 :    
366 :    
367 :    
368 :    
369 :    
370 : Isibaar 1.1 /*
371 :     decode headers
372 :     returns coding_type, or -1 if error
373 :     */
374 :    
375 : suxen_drol 1.22 #define VIDOBJ_START_CODE_MASK 0x0000001f
376 :     #define VIDOBJLAY_START_CODE_MASK 0x0000000f
377 :    
378 : edgomez 1.14 int
379 :     BitstreamReadHeaders(Bitstream * bs,
380 :     DECODER * dec,
381 :     uint32_t * rounding,
382 : edgomez 1.38 uint32_t * reduced_resolution,
383 : edgomez 1.14 uint32_t * quant,
384 :     uint32_t * fcode_forward,
385 :     uint32_t * fcode_backward,
386 : edgomez 1.38 uint32_t * intra_dc_threshold,
387 :     WARPPOINTS *gmc_warp)
388 : Isibaar 1.1 {
389 :     uint32_t vol_ver_id;
390 :     uint32_t coding_type;
391 :     uint32_t start_code;
392 : edgomez 1.14 uint32_t time_incr = 0;
393 : edgomez 1.39 int32_t time_increment = 0;
394 : edgomez 1.38 int resize = 0;
395 : chenm001 1.9
396 : edgomez 1.14 do {
397 : edgomez 1.38
398 : Isibaar 1.1 BitstreamByteAlign(bs);
399 :     start_code = BitstreamShowBits(bs, 32);
400 :    
401 : edgomez 1.14 if (start_code == VISOBJSEQ_START_CODE) {
402 : suxen_drol 1.22
403 :     int profile;
404 :    
405 : edgomez 1.42 DPRINTF(XVID_DEBUG_STARTCODE, "<visual_object_sequence>\n");
406 : suxen_drol 1.22
407 : edgomez 1.42 BitstreamSkip(bs, 32); /* visual_object_sequence_start_code */
408 :     profile = BitstreamGetBits(bs, 8); /* profile_and_level_indication */
409 : suxen_drol 1.22
410 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "profile_and_level_indication %i\n", profile);
411 : suxen_drol 1.22
412 : edgomez 1.14 } else if (start_code == VISOBJSEQ_STOP_CODE) {
413 : suxen_drol 1.22
414 : edgomez 1.42 BitstreamSkip(bs, 32); /* visual_object_sequence_stop_code */
415 : suxen_drol 1.22
416 : edgomez 1.42 DPRINTF(XVID_DEBUG_STARTCODE, "</visual_object_sequence>\n");
417 : suxen_drol 1.22
418 : edgomez 1.14 } else if (start_code == VISOBJ_START_CODE) {
419 : edgomez 1.38 int visobj_ver_id;
420 : suxen_drol 1.22
421 : edgomez 1.42 DPRINTF(XVID_DEBUG_STARTCODE, "<visual_object>\n");
422 : suxen_drol 1.22
423 : edgomez 1.42 BitstreamSkip(bs, 32); /* visual_object_start_code */
424 :     if (BitstreamGetBit(bs)) /* is_visual_object_identified */
425 : Isibaar 1.1 {
426 : edgomez 1.42 visobj_ver_id = BitstreamGetBits(bs, 4); /* visual_object_ver_id */
427 :     DPRINTF(XVID_DEBUG_HEADER,"visobj_ver_id %i\n", visobj_ver_id);
428 :     BitstreamSkip(bs, 3); /* visual_object_priority */
429 : edgomez 1.14 } else {
430 : edgomez 1.38 visobj_ver_id = 1;
431 : Isibaar 1.1 }
432 :    
433 : edgomez 1.42 if (BitstreamShowBits(bs, 4) != VISOBJ_TYPE_VIDEO) /* visual_object_type */
434 : Isibaar 1.1 {
435 : edgomez 1.42 DPRINTF(XVID_DEBUG_ERROR, "visual_object_type != video\n");
436 : Isibaar 1.1 return -1;
437 :     }
438 :     BitstreamSkip(bs, 4);
439 :    
440 : edgomez 1.42 /* video_signal_type */
441 : Isibaar 1.1
442 : edgomez 1.42 if (BitstreamGetBit(bs)) /* video_signal_type */
443 : Isibaar 1.1 {
444 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER,"+ video_signal_type\n");
445 :     BitstreamSkip(bs, 3); /* video_format */
446 :     BitstreamSkip(bs, 1); /* video_range */
447 :     if (BitstreamGetBit(bs)) /* color_description */
448 : Isibaar 1.1 {
449 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER,"+ color_description");
450 :     BitstreamSkip(bs, 8); /* color_primaries */
451 :     BitstreamSkip(bs, 8); /* transfer_characteristics */
452 :     BitstreamSkip(bs, 8); /* matrix_coefficients */
453 : Isibaar 1.1 }
454 :     }
455 : suxen_drol 1.22 } else if ((start_code & ~VIDOBJ_START_CODE_MASK) == VIDOBJ_START_CODE) {
456 :    
457 : edgomez 1.42 DPRINTF(XVID_DEBUG_STARTCODE, "<video_object>\n");
458 :     DPRINTF(XVID_DEBUG_HEADER, "vo id %i\n", start_code & VIDOBJ_START_CODE_MASK);
459 : suxen_drol 1.22
460 : edgomez 1.42 BitstreamSkip(bs, 32); /* video_object_start_code */
461 : suxen_drol 1.22
462 :     } else if ((start_code & ~VIDOBJLAY_START_CODE_MASK) == VIDOBJLAY_START_CODE) {
463 :    
464 : edgomez 1.42 DPRINTF(XVID_DEBUG_STARTCODE, "<video_object_layer>\n");
465 :     DPRINTF(XVID_DEBUG_HEADER, "vol id %i\n", start_code & VIDOBJLAY_START_CODE_MASK);
466 : Isibaar 1.1
467 : edgomez 1.42 BitstreamSkip(bs, 32); /* video_object_layer_start_code */
468 :     BitstreamSkip(bs, 1); /* random_accessible_vol */
469 : Isibaar 1.1
470 : edgomez 1.42 BitstreamSkip(bs, 8); /* video_object_type_indication */
471 : Isibaar 1.1
472 : edgomez 1.42 if (BitstreamGetBit(bs)) /* is_object_layer_identifier */
473 : Isibaar 1.1 {
474 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "+ is_object_layer_identifier\n");
475 :     vol_ver_id = BitstreamGetBits(bs, 4); /* video_object_layer_verid */
476 :     DPRINTF(XVID_DEBUG_HEADER,"ver_id %i\n", vol_ver_id);
477 :     BitstreamSkip(bs, 3); /* video_object_layer_priority */
478 : edgomez 1.14 } else {
479 : Isibaar 1.1 vol_ver_id = 1;
480 :     }
481 :    
482 : edgomez 1.38 dec->aspect_ratio = BitstreamGetBits(bs, 4);
483 :    
484 : edgomez 1.42 if (dec->aspect_ratio == VIDOBJLAY_AR_EXTPAR) /* aspect_ratio_info */
485 : Isibaar 1.1 {
486 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "+ aspect_ratio_info\n");
487 :     dec->par_width = BitstreamGetBits(bs, 8); /* par_width */
488 :     dec->par_height = BitstreamGetBits(bs, 8); /* par_height */
489 : Isibaar 1.1 }
490 :    
491 : edgomez 1.42 if (BitstreamGetBit(bs)) /* vol_control_parameters */
492 : Isibaar 1.1 {
493 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "+ vol_control_parameters\n");
494 :     BitstreamSkip(bs, 2); /* chroma_format */
495 :     dec->low_delay = BitstreamGetBit(bs); /* low_delay */
496 :     DPRINTF(XVID_DEBUG_HEADER, "low_delay %i\n", dec->low_delay);
497 :     if (BitstreamGetBit(bs)) /* vbv_parameters */
498 : Isibaar 1.1 {
499 : edgomez 1.38 unsigned int bitrate;
500 :     unsigned int buffer_size;
501 :     unsigned int occupancy;
502 :    
503 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER,"+ vbv_parameters\n");
504 : edgomez 1.38
505 : edgomez 1.42 bitrate = BitstreamGetBits(bs,15) << 15; /* first_half_bit_rate */
506 : Isibaar 1.1 READ_MARKER();
507 : edgomez 1.42 bitrate |= BitstreamGetBits(bs,15); /* latter_half_bit_rate */
508 : Isibaar 1.1 READ_MARKER();
509 : edgomez 1.42
510 :     buffer_size = BitstreamGetBits(bs, 15) << 3; /* first_half_vbv_buffer_size */
511 : Isibaar 1.1 READ_MARKER();
512 : edgomez 1.42 buffer_size |= BitstreamGetBits(bs, 3); /* latter_half_vbv_buffer_size */
513 : edgomez 1.38
514 : edgomez 1.42 occupancy = BitstreamGetBits(bs, 11) << 15; /* first_half_vbv_occupancy */
515 : Isibaar 1.1 READ_MARKER();
516 : edgomez 1.42 occupancy |= BitstreamGetBits(bs, 15); /* latter_half_vbv_occupancy */
517 : Isibaar 1.1 READ_MARKER();
518 : edgomez 1.14
519 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER,"bitrate %d (unit=400 bps)\n", bitrate);
520 :     DPRINTF(XVID_DEBUG_HEADER,"buffer_size %d (unit=16384 bits)\n", buffer_size);
521 :     DPRINTF(XVID_DEBUG_HEADER,"occupancy %d (unit=64 bits)\n", occupancy);
522 : Isibaar 1.1 }
523 : edgomez 1.38 }else{
524 :     dec->low_delay = dec->low_delay_default;
525 : Isibaar 1.1 }
526 :    
527 : edgomez 1.42 dec->shape = BitstreamGetBits(bs, 2); /* video_object_layer_shape */
528 : edgomez 1.38
529 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "shape %i\n", dec->shape);
530 : edgomez 1.38 if (dec->shape != VIDOBJLAY_SHAPE_RECTANGULAR)
531 :     {
532 : edgomez 1.42 DPRINTF(XVID_DEBUG_ERROR,"non-rectangular shapes are not supported\n");
533 : edgomez 1.38 }
534 : edgomez 1.14
535 :     if (dec->shape == VIDOBJLAY_SHAPE_GRAYSCALE && vol_ver_id != 1) {
536 : edgomez 1.42 BitstreamSkip(bs, 4); /* video_object_layer_shape_extension */
537 : Isibaar 1.1 }
538 :    
539 :     READ_MARKER();
540 :    
541 : edgomez 1.42 /********************** for decode B-frame time ***********************/
542 :     dec->time_inc_resolution = BitstreamGetBits(bs, 16); /* vop_time_increment_resolution */
543 :     DPRINTF(XVID_DEBUG_HEADER,"vop_time_increment_resolution %i\n", dec->time_inc_resolution);
544 : suxen_drol 1.22
545 : edgomez 1.42 #if 0
546 :     dec->time_inc_resolution--;
547 :     #endif
548 : suxen_drol 1.22
549 : edgomez 1.38 if (dec->time_inc_resolution > 0) {
550 : edgomez 1.44 dec->time_inc_bits = MAX(log2bin(dec->time_inc_resolution-1), 1);
551 : edgomez 1.14 } else {
552 : edgomez 1.42 #if 0
553 :     dec->time_inc_bits = 0;
554 :     #endif
555 :     /* for "old" xvid compatibility, set time_inc_bits = 1 */
556 : Isibaar 1.1 dec->time_inc_bits = 1;
557 :     }
558 :    
559 :     READ_MARKER();
560 :    
561 : edgomez 1.42 if (BitstreamGetBit(bs)) /* fixed_vop_rate */
562 : Isibaar 1.1 {
563 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "+ fixed_vop_rate\n");
564 :     BitstreamSkip(bs, dec->time_inc_bits); /* fixed_vop_time_increment */
565 : Isibaar 1.1 }
566 :    
567 : edgomez 1.14 if (dec->shape != VIDOBJLAY_SHAPE_BINARY_ONLY) {
568 : Isibaar 1.1
569 : edgomez 1.14 if (dec->shape == VIDOBJLAY_SHAPE_RECTANGULAR) {
570 : Isibaar 1.1 uint32_t width, height;
571 :    
572 :     READ_MARKER();
573 : edgomez 1.42 width = BitstreamGetBits(bs, 13); /* video_object_layer_width */
574 : Isibaar 1.1 READ_MARKER();
575 : edgomez 1.42 height = BitstreamGetBits(bs, 13); /* video_object_layer_height */
576 : Isibaar 1.1 READ_MARKER();
577 :    
578 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "width %i\n", width);
579 :     DPRINTF(XVID_DEBUG_HEADER, "height %i\n", height);
580 : chenm001 1.23
581 : edgomez 1.38 if (dec->width != width || dec->height != height)
582 :     {
583 :     if (dec->fixed_dimensions)
584 :     {
585 : edgomez 1.42 DPRINTF(XVID_DEBUG_ERROR, "decoder width/height does not match bitstream\n");
586 : edgomez 1.38 return -1;
587 :     }
588 :     resize = 1;
589 : chenm001 1.23 dec->width = width;
590 :     dec->height = height;
591 : Isibaar 1.1 }
592 :     }
593 : h 1.4
594 : suxen_drol 1.22 dec->interlacing = BitstreamGetBit(bs);
595 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "interlacing %i\n", dec->interlacing);
596 : Isibaar 1.1
597 : edgomez 1.42 if (!BitstreamGetBit(bs)) /* obmc_disable */
598 : Isibaar 1.1 {
599 : edgomez 1.42 DPRINTF(XVID_DEBUG_ERROR, "obmc_disabled==false not supported\n");
600 :     /* TODO */
601 :     /* fucking divx4.02 has this enabled */
602 : Isibaar 1.1 }
603 :    
604 : edgomez 1.42 dec->sprite_enable = BitstreamGetBits(bs, (vol_ver_id == 1 ? 1 : 2)); /* sprite_enable */
605 : edgomez 1.38
606 :     if (dec->sprite_enable == SPRITE_STATIC || dec->sprite_enable == SPRITE_GMC)
607 : Isibaar 1.1 {
608 : edgomez 1.38 int low_latency_sprite_enable;
609 :    
610 :     if (dec->sprite_enable != SPRITE_GMC)
611 :     {
612 :     int sprite_width;
613 :     int sprite_height;
614 :     int sprite_left_coord;
615 :     int sprite_top_coord;
616 : edgomez 1.42 sprite_width = BitstreamGetBits(bs, 13); /* sprite_width */
617 : edgomez 1.38 READ_MARKER();
618 : edgomez 1.42 sprite_height = BitstreamGetBits(bs, 13); /* sprite_height */
619 : edgomez 1.38 READ_MARKER();
620 : edgomez 1.42 sprite_left_coord = BitstreamGetBits(bs, 13); /* sprite_left_coordinate */
621 : edgomez 1.38 READ_MARKER();
622 : edgomez 1.42 sprite_top_coord = BitstreamGetBits(bs, 13); /* sprite_top_coordinate */
623 : edgomez 1.38 READ_MARKER();
624 :     }
625 : edgomez 1.42 dec->sprite_warping_points = BitstreamGetBits(bs, 6); /* no_of_sprite_warping_points */
626 :     dec->sprite_warping_accuracy = BitstreamGetBits(bs, 2); /* sprite_warping_accuracy */
627 :     dec->sprite_brightness_change = BitstreamGetBits(bs, 1); /* brightness_change */
628 : edgomez 1.38 if (dec->sprite_enable != SPRITE_GMC)
629 :     {
630 : edgomez 1.42 low_latency_sprite_enable = BitstreamGetBits(bs, 1); /* low_latency_sprite_enable */
631 : edgomez 1.38 }
632 : Isibaar 1.1 }
633 : edgomez 1.14
634 :     if (vol_ver_id != 1 &&
635 :     dec->shape != VIDOBJLAY_SHAPE_RECTANGULAR) {
636 : edgomez 1.42 BitstreamSkip(bs, 1); /* sadct_disable */
637 : Isibaar 1.1 }
638 :    
639 : edgomez 1.42 if (BitstreamGetBit(bs)) /* not_8_bit */
640 : Isibaar 1.1 {
641 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "not_8_bit==true (ignored)\n");
642 :     dec->quant_bits = BitstreamGetBits(bs, 4); /* quant_precision */
643 :     BitstreamSkip(bs, 4); /* bits_per_pixel */
644 : edgomez 1.14 } else {
645 : Isibaar 1.1 dec->quant_bits = 5;
646 :     }
647 :    
648 : edgomez 1.14 if (dec->shape == VIDOBJLAY_SHAPE_GRAYSCALE) {
649 : edgomez 1.42 BitstreamSkip(bs, 1); /* no_gray_quant_update */
650 :     BitstreamSkip(bs, 1); /* composition_method */
651 :     BitstreamSkip(bs, 1); /* linear_composition */
652 : Isibaar 1.1 }
653 :    
654 : edgomez 1.42 dec->quant_type = BitstreamGetBit(bs); /* quant_type */
655 :     DPRINTF(XVID_DEBUG_HEADER, "quant_type %i\n", dec->quant_type);
656 : Isibaar 1.1
657 : edgomez 1.14 if (dec->quant_type) {
658 : edgomez 1.42 if (BitstreamGetBit(bs)) /* load_intra_quant_mat */
659 : Isibaar 1.1 {
660 : Isibaar 1.3 uint8_t matrix[64];
661 : edgomez 1.14
662 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "load_intra_quant_mat\n");
663 : suxen_drol 1.22
664 : Isibaar 1.2 bs_get_matrix(bs, matrix);
665 : edgomez 1.42 set_intra_matrix(dec->mpeg_quant_matrices, matrix);
666 : edgomez 1.14 } else
667 : edgomez 1.42 set_intra_matrix(dec->mpeg_quant_matrices, get_default_intra_matrix());
668 : Isibaar 1.2
669 : edgomez 1.42 if (BitstreamGetBit(bs)) /* load_inter_quant_mat */
670 : Isibaar 1.1 {
671 : edgomez 1.14 uint8_t matrix[64];
672 : edgomez 1.42
673 :     DPRINTF(XVID_DEBUG_HEADER, "load_inter_quant_mat\n");
674 : edgomez 1.14
675 : Isibaar 1.2 bs_get_matrix(bs, matrix);
676 : edgomez 1.42 set_inter_matrix(dec->mpeg_quant_matrices, matrix);
677 : edgomez 1.14 } else
678 : edgomez 1.42 set_inter_matrix(dec->mpeg_quant_matrices, get_default_inter_matrix());
679 : Isibaar 1.1
680 : edgomez 1.14 if (dec->shape == VIDOBJLAY_SHAPE_GRAYSCALE) {
681 : edgomez 1.42 DPRINTF(XVID_DEBUG_ERROR, "greyscale matrix not supported\n");
682 : Isibaar 1.1 return -1;
683 :     }
684 : Isibaar 1.2
685 : Isibaar 1.1 }
686 :    
687 : edgomez 1.14
688 :     if (vol_ver_id != 1) {
689 : edgomez 1.42 dec->quarterpel = BitstreamGetBit(bs); /* quarter_sample */
690 :     DPRINTF(XVID_DEBUG_HEADER,"quarterpel %i\n", dec->quarterpel);
691 : Isibaar 1.26 }
692 :     else
693 : Isibaar 1.1 dec->quarterpel = 0;
694 : edgomez 1.42
695 : Isibaar 1.1
696 : edgomez 1.38 dec->complexity_estimation_disable = BitstreamGetBit(bs); /* complexity estimation disable */
697 :     if (!dec->complexity_estimation_disable)
698 : Isibaar 1.1 {
699 : edgomez 1.38 read_vol_complexity_estimation_header(bs, dec);
700 : Isibaar 1.1 }
701 :    
702 : edgomez 1.42 BitstreamSkip(bs, 1); /* resync_marker_disable */
703 : Isibaar 1.1
704 : edgomez 1.42 if (BitstreamGetBit(bs)) /* data_partitioned */
705 : Isibaar 1.1 {
706 : edgomez 1.42 DPRINTF(XVID_DEBUG_ERROR, "data_partitioned not supported\n");
707 :     BitstreamSkip(bs, 1); /* reversible_vlc */
708 : Isibaar 1.1 }
709 :    
710 : edgomez 1.14 if (vol_ver_id != 1) {
711 : edgomez 1.38 dec->newpred_enable = BitstreamGetBit(bs);
712 : edgomez 1.42 if (dec->newpred_enable) /* newpred_enable */
713 : Isibaar 1.1 {
714 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "+ newpred_enable\n");
715 :     BitstreamSkip(bs, 2); /* requested_upstream_message_type */
716 :     BitstreamSkip(bs, 1); /* newpred_segment_type */
717 : Isibaar 1.1 }
718 : edgomez 1.38 dec->reduced_resolution_enable = BitstreamGetBit(bs); /* reduced_resolution_vop_enable */
719 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "reduced_resolution_enable %i\n", dec->reduced_resolution_enable);
720 : edgomez 1.38 }
721 :     else
722 :     {
723 :     dec->newpred_enable = 0;
724 :     dec->reduced_resolution_enable = 0;
725 : Isibaar 1.1 }
726 : edgomez 1.14
727 : edgomez 1.38 dec->scalability = BitstreamGetBit(bs); /* scalability */
728 : edgomez 1.42 if (dec->scalability)
729 : Isibaar 1.1 {
730 : edgomez 1.42 DPRINTF(XVID_DEBUG_ERROR, "scalability not supported\n");
731 : edgomez 1.38 BitstreamSkip(bs, 1); /* hierarchy_type */
732 :     BitstreamSkip(bs, 4); /* ref_layer_id */
733 :     BitstreamSkip(bs, 1); /* ref_layer_sampling_direc */
734 :     BitstreamSkip(bs, 5); /* hor_sampling_factor_n */
735 :     BitstreamSkip(bs, 5); /* hor_sampling_factor_m */
736 :     BitstreamSkip(bs, 5); /* vert_sampling_factor_n */
737 :     BitstreamSkip(bs, 5); /* vert_sampling_factor_m */
738 :     BitstreamSkip(bs, 1); /* enhancement_type */
739 :     if(dec->shape == VIDOBJLAY_SHAPE_BINARY /* && hierarchy_type==0 */) {
740 :     BitstreamSkip(bs, 1); /* use_ref_shape */
741 :     BitstreamSkip(bs, 1); /* use_ref_texture */
742 :     BitstreamSkip(bs, 5); /* shape_hor_sampling_factor_n */
743 :     BitstreamSkip(bs, 5); /* shape_hor_sampling_factor_m */
744 :     BitstreamSkip(bs, 5); /* shape_vert_sampling_factor_n */
745 :     BitstreamSkip(bs, 5); /* shape_vert_sampling_factor_m */
746 :     }
747 : Isibaar 1.1 return -1;
748 :     }
749 : edgomez 1.42 } else /* dec->shape == BINARY_ONLY */
750 : Isibaar 1.1 {
751 : edgomez 1.14 if (vol_ver_id != 1) {
752 : edgomez 1.38 dec->scalability = BitstreamGetBit(bs); /* scalability */
753 : edgomez 1.42 if (dec->scalability)
754 : Isibaar 1.1 {
755 : edgomez 1.42 DPRINTF(XVID_DEBUG_ERROR, "scalability not supported\n");
756 : edgomez 1.38 BitstreamSkip(bs, 4); /* ref_layer_id */
757 :     BitstreamSkip(bs, 5); /* hor_sampling_factor_n */
758 :     BitstreamSkip(bs, 5); /* hor_sampling_factor_m */
759 :     BitstreamSkip(bs, 5); /* vert_sampling_factor_n */
760 :     BitstreamSkip(bs, 5); /* vert_sampling_factor_m */
761 : Isibaar 1.1 return -1;
762 :     }
763 :     }
764 : edgomez 1.42 BitstreamSkip(bs, 1); /* resync_marker_disable */
765 : Isibaar 1.1
766 :     }
767 :    
768 : edgomez 1.38 return (resize ? -3 : -2 ); /* VOL */
769 :    
770 : edgomez 1.14 } else if (start_code == GRPOFVOP_START_CODE) {
771 : suxen_drol 1.22
772 : edgomez 1.42 DPRINTF(XVID_DEBUG_STARTCODE, "<group_of_vop>\n");
773 : suxen_drol 1.22
774 : Isibaar 1.1 BitstreamSkip(bs, 32);
775 :     {
776 :     int hours, minutes, seconds;
777 : edgomez 1.14
778 : Isibaar 1.1 hours = BitstreamGetBits(bs, 5);
779 :     minutes = BitstreamGetBits(bs, 6);
780 :     READ_MARKER();
781 :     seconds = BitstreamGetBits(bs, 6);
782 : edgomez 1.42
783 :     DPRINTF(XVID_DEBUG_HEADER, "time %ih%im%is\n", hours,minutes,seconds);
784 : Isibaar 1.1 }
785 : edgomez 1.42 BitstreamSkip(bs, 1); /* closed_gov */
786 :     BitstreamSkip(bs, 1); /* broken_link */
787 : suxen_drol 1.22
788 : edgomez 1.14 } else if (start_code == VOP_START_CODE) {
789 : suxen_drol 1.22
790 : edgomez 1.42 DPRINTF(XVID_DEBUG_STARTCODE, "<vop>\n");
791 : suxen_drol 1.22
792 : edgomez 1.42 BitstreamSkip(bs, 32); /* vop_start_code */
793 : Isibaar 1.1
794 : edgomez 1.42 coding_type = BitstreamGetBits(bs, 2); /* vop_coding_type */
795 :     DPRINTF(XVID_DEBUG_HEADER, "coding_type %i\n", coding_type);
796 : Isibaar 1.1
797 : edgomez 1.42 /*********************** for decode B-frame time ***********************/
798 :     while (BitstreamGetBit(bs) != 0) /* time_base */
799 : chenm001 1.9 time_incr++;
800 : edgomez 1.14
801 : Isibaar 1.1 READ_MARKER();
802 : edgomez 1.14
803 :     if (dec->time_inc_bits) {
804 : edgomez 1.42 time_increment = (BitstreamGetBits(bs, dec->time_inc_bits)); /* vop_time_increment */
805 : chenm001 1.9 }
806 : suxen_drol 1.19
807 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "time_base %i\n", time_incr);
808 :     DPRINTF(XVID_DEBUG_HEADER, "time_increment %i\n", time_increment);
809 : suxen_drol 1.22
810 : edgomez 1.42 DPRINTF(XVID_DEBUG_TIMECODE, "%c %i:%i\n",
811 : edgomez 1.38 coding_type == I_VOP ? 'I' : coding_type == P_VOP ? 'P' : coding_type == B_VOP ? 'B' : 'S',
812 : suxen_drol 1.19 time_incr, time_increment);
813 :    
814 : edgomez 1.14 if (coding_type != B_VOP) {
815 :     dec->last_time_base = dec->time_base;
816 : chenm001 1.9 dec->time_base += time_incr;
817 : edgomez 1.44 dec->time = dec->time_base*dec->time_inc_resolution + time_increment;
818 :     dec->time_pp = (int32_t)(dec->time - dec->last_non_b_time);
819 : edgomez 1.14 dec->last_non_b_time = dec->time;
820 :     } else {
821 : edgomez 1.44 dec->time = (dec->last_time_base + time_incr)*dec->time_inc_resolution + time_increment;
822 :     dec->time_bp = dec->time_pp - (int32_t)(dec->last_non_b_time - dec->time);
823 : Isibaar 1.1 }
824 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER,"time_pp=%i\n", dec->time_pp);
825 :     DPRINTF(XVID_DEBUG_HEADER,"time_bp=%i\n", dec->time_bp);
826 : Isibaar 1.1
827 :     READ_MARKER();
828 :    
829 : edgomez 1.42 if (!BitstreamGetBit(bs)) /* vop_coded */
830 : Isibaar 1.1 {
831 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "vop_coded==false\n");
832 : Isibaar 1.1 return N_VOP;
833 :     }
834 :    
835 : edgomez 1.38 if (dec->newpred_enable)
836 :     {
837 :     int vop_id;
838 :     int vop_id_for_prediction;
839 : edgomez 1.42
840 : edgomez 1.38 vop_id = BitstreamGetBits(bs, MIN(dec->time_inc_bits + 3, 15));
841 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "vop_id %i\n", vop_id);
842 : edgomez 1.38 if (BitstreamGetBit(bs)) /* vop_id_for_prediction_indication */
843 :     {
844 :     vop_id_for_prediction = BitstreamGetBits(bs, MIN(dec->time_inc_bits + 3, 15));
845 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "vop_id_for_prediction %i\n", vop_id_for_prediction);
846 : edgomez 1.38 }
847 :     READ_MARKER();
848 :     }
849 :    
850 : Isibaar 1.1
851 : edgomez 1.42
852 :     /* fix a little bug by MinChen <chenm002@163.com> */
853 : edgomez 1.14 if ((dec->shape != VIDOBJLAY_SHAPE_BINARY_ONLY) &&
854 : edgomez 1.38 ( (coding_type == P_VOP) || (coding_type == S_VOP && dec->sprite_enable == SPRITE_GMC) ) ) {
855 : edgomez 1.42 *rounding = BitstreamGetBit(bs); /* rounding_type */
856 :     DPRINTF(XVID_DEBUG_HEADER, "rounding %i\n", *rounding);
857 : Isibaar 1.1 }
858 :    
859 : edgomez 1.38 if (dec->reduced_resolution_enable &&
860 :     dec->shape == VIDOBJLAY_SHAPE_RECTANGULAR &&
861 :     (coding_type == P_VOP || coding_type == I_VOP)) {
862 :    
863 :     *reduced_resolution = BitstreamGetBit(bs);
864 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "reduced_resolution %i\n", *reduced_resolution);
865 : edgomez 1.38 }
866 :     else
867 :     {
868 :     *reduced_resolution = 0;
869 :     }
870 : Isibaar 1.1
871 : edgomez 1.14 if (dec->shape != VIDOBJLAY_SHAPE_RECTANGULAR) {
872 : edgomez 1.38 if(!(dec->sprite_enable == SPRITE_STATIC && coding_type == I_VOP)) {
873 : edgomez 1.14
874 : edgomez 1.38 uint32_t width, height;
875 :     uint32_t horiz_mc_ref, vert_mc_ref;
876 : Isibaar 1.1
877 : edgomez 1.38 width = BitstreamGetBits(bs, 13);
878 :     READ_MARKER();
879 :     height = BitstreamGetBits(bs, 13);
880 :     READ_MARKER();
881 :     horiz_mc_ref = BitstreamGetBits(bs, 13);
882 :     READ_MARKER();
883 :     vert_mc_ref = BitstreamGetBits(bs, 13);
884 :     READ_MARKER();
885 : Isibaar 1.1
886 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "width %i\n", width);
887 :     DPRINTF(XVID_DEBUG_HEADER, "height %i\n", height);
888 :     DPRINTF(XVID_DEBUG_HEADER, "horiz_mc_ref %i\n", horiz_mc_ref);
889 :     DPRINTF(XVID_DEBUG_HEADER, "vert_mc_ref %i\n", vert_mc_ref);
890 : edgomez 1.38 }
891 :    
892 : edgomez 1.42 BitstreamSkip(bs, 1); /* change_conv_ratio_disable */
893 :     if (BitstreamGetBit(bs)) /* vop_constant_alpha */
894 : Isibaar 1.1 {
895 : edgomez 1.42 BitstreamSkip(bs, 8); /* vop_constant_alpha_value */
896 : Isibaar 1.1 }
897 :     }
898 :    
899 : edgomez 1.38 if (dec->shape != VIDOBJLAY_SHAPE_BINARY_ONLY) {
900 : edgomez 1.14
901 : edgomez 1.38 if (!dec->complexity_estimation_disable)
902 :     {
903 :     read_vop_complexity_estimation_header(bs, dec, coding_type);
904 :     }
905 :    
906 : edgomez 1.42 /* intra_dc_vlc_threshold */
907 : edgomez 1.14 *intra_dc_threshold =
908 :     intra_dc_threshold_table[BitstreamGetBits(bs, 3)];
909 : Isibaar 1.1
910 : edgomez 1.38 dec->top_field_first = 0;
911 :     dec->alternate_vertical_scan = 0;
912 :    
913 : edgomez 1.14 if (dec->interlacing) {
914 : suxen_drol 1.22 dec->top_field_first = BitstreamGetBit(bs);
915 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "interlace top_field_first %i\n", dec->top_field_first);
916 : suxen_drol 1.22 dec->alternate_vertical_scan = BitstreamGetBit(bs);
917 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "interlace alternate_vertical_scan %i\n", dec->alternate_vertical_scan);
918 :    
919 : h 1.4 }
920 : Isibaar 1.1 }
921 : edgomez 1.14
922 : edgomez 1.38 if ((dec->sprite_enable == SPRITE_STATIC || dec->sprite_enable== SPRITE_GMC) && coding_type == S_VOP) {
923 :    
924 :     int i;
925 :    
926 :     for (i = 0 ; i < dec->sprite_warping_points; i++)
927 :     {
928 :     int length;
929 :     int x = 0, y = 0;
930 :    
931 :     /* sprite code borowed from ffmpeg; thx Michael Niedermayer <michaelni@gmx.at> */
932 :     length = bs_get_spritetrajectory(bs);
933 :     if(length){
934 :     x= BitstreamGetBits(bs, length);
935 :     if ((x >> (length - 1)) == 0) /* if MSB not set it is negative*/
936 :     x = - (x ^ ((1 << length) - 1));
937 :     }
938 :     READ_MARKER();
939 : edgomez 1.42
940 : edgomez 1.38 length = bs_get_spritetrajectory(bs);
941 :     if(length){
942 :     y = BitstreamGetBits(bs, length);
943 :     if ((y >> (length - 1)) == 0) /* if MSB not set it is negative*/
944 :     y = - (y ^ ((1 << length) - 1));
945 :     }
946 :     READ_MARKER();
947 :    
948 :     gmc_warp->duv[i].x = x;
949 :     gmc_warp->duv[i].y = y;
950 :    
951 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER,"sprite_warping_point[%i] xy=(%i,%i)\n", i, x, y);
952 : edgomez 1.38 }
953 :    
954 :     if (dec->sprite_brightness_change)
955 :     {
956 : edgomez 1.42 /* XXX: brightness_change_factor() */
957 : edgomez 1.38 }
958 :     if (dec->sprite_enable == SPRITE_STATIC)
959 :     {
960 : edgomez 1.42 /* XXX: todo */
961 : edgomez 1.38 }
962 :    
963 :     }
964 :    
965 : edgomez 1.42 if ((*quant = BitstreamGetBits(bs, dec->quant_bits)) < 1) /* vop_quant */
966 : Isibaar 1.10 *quant = 1;
967 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "quant %i\n", *quant);
968 : edgomez 1.14
969 :     if (coding_type != I_VOP) {
970 : edgomez 1.42 *fcode_forward = BitstreamGetBits(bs, 3); /* fcode_forward */
971 :     DPRINTF(XVID_DEBUG_HEADER, "fcode_forward %i\n", *fcode_forward);
972 : Isibaar 1.1 }
973 : edgomez 1.14
974 :     if (coding_type == B_VOP) {
975 : edgomez 1.42 *fcode_backward = BitstreamGetBits(bs, 3); /* fcode_backward */
976 :     DPRINTF(XVID_DEBUG_HEADER, "fcode_backward %i\n", *fcode_backward);
977 : chenm001 1.9 }
978 : edgomez 1.14 if (!dec->scalability) {
979 :     if ((dec->shape != VIDOBJLAY_SHAPE_RECTANGULAR) &&
980 :     (coding_type != I_VOP)) {
981 : edgomez 1.42 BitstreamSkip(bs, 1); /* vop_shape_coding_type */
982 : chenm001 1.9 }
983 : Isibaar 1.1 }
984 :     return coding_type;
985 : suxen_drol 1.22
986 : edgomez 1.14 } else if (start_code == USERDATA_START_CODE) {
987 : edgomez 1.38 char tmp[256];
988 :     int i, version, build;
989 :     char packed;
990 :    
991 : edgomez 1.42 BitstreamSkip(bs, 32); /* user_data_start_code */
992 : edgomez 1.38
993 :     tmp[0] = BitstreamShowBits(bs, 8);
994 : edgomez 1.42
995 : edgomez 1.38 for(i = 1; i < 256; i++){
996 :     tmp[i] = (BitstreamShowBits(bs, 16) & 0xFF);
997 : edgomez 1.42
998 :     if(tmp[i] == 0)
999 : edgomez 1.38 break;
1000 : edgomez 1.42
1001 : edgomez 1.38 BitstreamSkip(bs, 8);
1002 :     }
1003 : suxen_drol 1.22
1004 : edgomez 1.42 DPRINTF(XVID_DEBUG_STARTCODE, "<user_data>: %s\n", tmp);
1005 :    
1006 : Isibaar 1.40 /* read xvid bitstream version */
1007 :     if(strncmp(tmp, "XviD", 4) == 0) {
1008 : edgomez 1.42 if (tmp[strlen(tmp)-1] == 'C') {
1009 :     sscanf(tmp, "XviD%dC", &dec->bs_version);
1010 :     dec->cartoon_mode = 1;
1011 :     }
1012 :     else
1013 :     sscanf(tmp, "XviD%d", &dec->bs_version);
1014 :    
1015 : edgomez 1.44 DPRINTF(XVID_DEBUG_HEADER, "xvid bitstream version=%i\n", dec->bs_version);
1016 : Isibaar 1.40 }
1017 : suxen_drol 1.22
1018 : edgomez 1.38 /* divx detection */
1019 :     i = sscanf(tmp, "DivX%dBuild%d%c", &version, &build, &packed);
1020 :     if (i < 2)
1021 :     i = sscanf(tmp, "DivX%db%d%c", &version, &build, &packed);
1022 : edgomez 1.42
1023 : edgomez 1.38 if (i >= 2)
1024 :     {
1025 :     dec->packed_mode = (i == 3 && packed == 'p');
1026 : edgomez 1.42 DPRINTF(XVID_DEBUG_HEADER, "divx version=%i, build=%i packed=%i\n",
1027 : edgomez 1.38 version, build, dec->packed_mode);
1028 :     }
1029 : suxen_drol 1.22
1030 : edgomez 1.42 } else /* start_code == ? */
1031 : Isibaar 1.1 {
1032 : edgomez 1.14 if (BitstreamShowBits(bs, 24) == 0x000001) {
1033 : edgomez 1.42 DPRINTF(XVID_DEBUG_STARTCODE, "<unknown: %x>\n", BitstreamShowBits(bs, 32));
1034 : Isibaar 1.1 }
1035 :     BitstreamSkip(bs, 8);
1036 :     }
1037 :     }
1038 :     while ((BitstreamPos(bs) >> 3) < bs->length);
1039 :    
1040 : edgomez 1.42 #if 0
1041 :     DPRINTF("*** WARNING: no vop_start_code found");
1042 :     #endif
1043 : edgomez 1.14 return -1; /* ignore it */
1044 : Isibaar 1.1 }
1045 :    
1046 :    
1047 :     /* write custom quant matrix */
1048 :    
1049 : edgomez 1.14 static void
1050 :     bs_put_matrix(Bitstream * bs,
1051 : edgomez 1.42 const uint16_t * matrix)
1052 : Isibaar 1.1 {
1053 :     int i, j;
1054 :     const int last = matrix[scan_tables[0][63]];
1055 :    
1056 : suxen_drol 1.18 for (j = 63; j > 0 && matrix[scan_tables[0][j - 1]] == last; j--);
1057 : Isibaar 1.1
1058 : edgomez 1.14 for (i = 0; i <= j; i++) {
1059 : Isibaar 1.1 BitstreamPutBits(bs, matrix[scan_tables[0][i]], 8);
1060 :     }
1061 :    
1062 : edgomez 1.14 if (j < 63) {
1063 : Isibaar 1.1 BitstreamPutBits(bs, 0, 8);
1064 :     }
1065 :     }
1066 :    
1067 :    
1068 :     /*
1069 :     write vol header
1070 :     */
1071 : edgomez 1.14 void
1072 :     BitstreamWriteVolHeader(Bitstream * const bs,
1073 :     const MBParam * pParam,
1074 : edgomez 1.38 const FRAMEINFO * const frame)
1075 : Isibaar 1.1 {
1076 : edgomez 1.38 static const unsigned int vo_id = 0;
1077 :     static const unsigned int vol_id = 0;
1078 : edgomez 1.42 int vol_ver_id = 1;
1079 :     int vol_type_ind = VIDOBJLAY_TYPE_SIMPLE;
1080 :     int vol_profile = pParam->profile;
1081 :    
1082 :     if ( (pParam->vol_flags & XVID_VOL_QUARTERPEL) ||
1083 :     (pParam->vol_flags & XVID_VOL_GMC) ||
1084 :     (pParam->vol_flags & XVID_VOL_REDUCED_ENABLE))
1085 : edgomez 1.38 vol_ver_id = 2;
1086 :    
1087 : edgomez 1.42 if ((pParam->vol_flags & XVID_VOL_REDUCED_ENABLE)) {
1088 :     vol_type_ind = VIDOBJLAY_TYPE_ART_SIMPLE;
1089 :     }
1090 :    
1091 :     if ((pParam->vol_flags & XVID_VOL_QUARTERPEL) ||
1092 :     (pParam->vol_flags & XVID_VOL_GMC)) {
1093 :     vol_type_ind = VIDOBJLAY_TYPE_ASP;
1094 :     }
1095 : edgomez 1.38
1096 : edgomez 1.42 /* visual_object_sequence_start_code */
1097 :     #if 0
1098 :     BitstreamPad(bs);
1099 :     #endif
1100 : edgomez 1.38
1101 : edgomez 1.42 /*
1102 :     * no padding here, anymore. You have to make sure that you are
1103 :     * byte aligned, and that always 1-8 padding bits have been written
1104 :     */
1105 : edgomez 1.38
1106 : edgomez 1.42 if (!vol_profile) {
1107 :     /* Profile was not set by client app, use the more permissive profile
1108 :     * compatible with the vol_type_id */
1109 :     switch(vol_type_ind) {
1110 :     case VIDOBJLAY_TYPE_ASP:
1111 :     vol_profile = 0xf5; /* ASP level 5 */
1112 :     break;
1113 :     case VIDOBJLAY_TYPE_ART_SIMPLE:
1114 :     vol_profile = 0x94; /* ARTS level 4 */
1115 :     break;
1116 :     default:
1117 :     vol_profile = 0x03; /* Simple level 3 */
1118 :     break;
1119 :     }
1120 :     }
1121 :    
1122 :     /* Write the VOS header */
1123 : edgomez 1.38 BitstreamPutBits(bs, VISOBJSEQ_START_CODE, 32);
1124 : edgomez 1.42 BitstreamPutBits(bs, vol_profile, 8); /* profile_and_level_indication */
1125 : edgomez 1.38
1126 : edgomez 1.42
1127 :     /* visual_object_start_code */
1128 : edgomez 1.38 BitstreamPad(bs);
1129 :     BitstreamPutBits(bs, VISOBJ_START_CODE, 32);
1130 : edgomez 1.42 BitstreamPutBits(bs, 0, 1); /* is_visual_object_identifier */
1131 : edgomez 1.41
1132 :     /* Video type */
1133 : edgomez 1.42 BitstreamPutBits(bs, VISOBJ_TYPE_VIDEO, 4); /* visual_object_type */
1134 : edgomez 1.41 BitstreamPutBit(bs, 0); /* video_signal_type */
1135 :    
1136 : edgomez 1.42 /* video object_start_code & vo_id */
1137 :     BitstreamPadAlways(bs); /* next_start_code() */
1138 : edgomez 1.38 BitstreamPutBits(bs, VIDOBJ_START_CODE|(vo_id&0x5), 32);
1139 : Isibaar 1.1
1140 : edgomez 1.42 /* video_object_layer_start_code & vol_id */
1141 : edgomez 1.38 BitstreamPad(bs);
1142 :     BitstreamPutBits(bs, VIDOBJLAY_START_CODE|(vol_id&0x4), 32);
1143 : Isibaar 1.1
1144 : edgomez 1.42 BitstreamPutBit(bs, 0); /* random_accessible_vol */
1145 :     BitstreamPutBits(bs, vol_type_ind, 8); /* video_object_type_indication */
1146 : suxen_drol 1.12
1147 : edgomez 1.42 if (vol_ver_id == 1) {
1148 :     BitstreamPutBit(bs, 0); /* is_object_layer_identified (0=not given) */
1149 :     } else {
1150 :     BitstreamPutBit(bs, 1); /* is_object_layer_identified */
1151 :     BitstreamPutBits(bs, vol_ver_id, 4); /* vol_ver_id == 2 */
1152 :     BitstreamPutBits(bs, 4, 3); /* vol_ver_priority (1==highest, 7==lowest) */
1153 :     }
1154 :    
1155 :     /* Aspect ratio */
1156 :     BitstreamPutBits(bs, pParam->par, 4); /* aspect_ratio_info (1=1:1) */
1157 :     if(pParam->par == XVID_PAR_EXT) {
1158 :     BitstreamPutBits(bs, pParam->par_width, 8);
1159 :     BitstreamPutBits(bs, pParam->par_height, 8);
1160 : edgomez 1.38 }
1161 : chl 1.28
1162 : edgomez 1.42 BitstreamPutBit(bs, 1); /* vol_control_parameters */
1163 :     BitstreamPutBits(bs, 1, 2); /* chroma_format 1="4:2:0" */
1164 : suxen_drol 1.12
1165 : edgomez 1.38 if (pParam->max_bframes > 0) {
1166 : edgomez 1.42 BitstreamPutBit(bs, 0); /* low_delay */
1167 : edgomez 1.38 } else
1168 :     {
1169 : edgomez 1.42 BitstreamPutBit(bs, 1); /* low_delay */
1170 : edgomez 1.38 }
1171 : edgomez 1.42 BitstreamPutBit(bs, 0); /* vbv_parameters (0=not given) */
1172 : edgomez 1.38
1173 : edgomez 1.42 BitstreamPutBits(bs, 0, 2); /* video_object_layer_shape (0=rectangular) */
1174 : Isibaar 1.1
1175 :     WRITE_MARKER();
1176 : edgomez 1.14
1177 : edgomez 1.42 /*
1178 :     * time_inc_resolution; ignored by current decore versions
1179 :     * eg. 2fps res=2 inc=1
1180 :     * 25fps res=25 inc=1
1181 :     * 29.97fps res=30000 inc=1001
1182 : edgomez 1.14 */
1183 : suxen_drol 1.11 BitstreamPutBits(bs, pParam->fbase, 16);
1184 : edgomez 1.31
1185 : Isibaar 1.1 WRITE_MARKER();
1186 :    
1187 : edgomez 1.42 if (pParam->fincr>0) {
1188 : edgomez 1.43 BitstreamPutBit(bs, 1); /* fixed_vop_rate = 1 */
1189 :     BitstreamPutBits(bs, pParam->fincr, MAX(log2bin(pParam->fbase-1),1)); /* fixed_vop_time_increment */
1190 : edgomez 1.42 }else{
1191 :     BitstreamPutBit(bs, 0); /* fixed_vop_rate = 0 */
1192 :     }
1193 : Isibaar 1.1
1194 :     WRITE_MARKER();
1195 : edgomez 1.42 BitstreamPutBits(bs, pParam->width, 13); /* width */
1196 : Isibaar 1.1 WRITE_MARKER();
1197 : edgomez 1.42 BitstreamPutBits(bs, pParam->height, 13); /* height */
1198 : Isibaar 1.1 WRITE_MARKER();
1199 : edgomez 1.14
1200 : edgomez 1.42 BitstreamPutBit(bs, pParam->vol_flags & XVID_VOL_INTERLACING); /* interlace */
1201 :     BitstreamPutBit(bs, 1); /* obmc_disable (overlapped block motion compensation) */
1202 : edgomez 1.38
1203 : edgomez 1.42 if (vol_ver_id != 1)
1204 :     { if ((pParam->vol_flags & XVID_VOL_GMC))
1205 :     { BitstreamPutBits(bs, 2, 2); /* sprite_enable=='GMC' */
1206 :     BitstreamPutBits(bs, 3, 6); /* no_of_sprite_warping_points */
1207 :     BitstreamPutBits(bs, 3, 2); /* sprite_warping_accuracy 0==1/2, 1=1/4, 2=1/8, 3=1/16 */
1208 :     BitstreamPutBit(bs, 0); /* sprite_brightness_change (not supported) */
1209 :    
1210 :     /*
1211 :     * currently we use no_of_sprite_warping_points==2, sprite_warping_accuracy==3
1212 :     * for DivX5 compatability
1213 :     */
1214 : edgomez 1.38
1215 :     } else
1216 : edgomez 1.42 BitstreamPutBits(bs, 0, 2); /* sprite_enable==off */
1217 : edgomez 1.38 }
1218 :     else
1219 : edgomez 1.42 BitstreamPutBit(bs, 0); /* sprite_enable==off */
1220 : edgomez 1.38
1221 : edgomez 1.42 BitstreamPutBit(bs, 0); /* not_8_bit */
1222 : Isibaar 1.1
1223 : edgomez 1.42 /* quant_type 0=h.263 1=mpeg4(quantizer tables) */
1224 :     BitstreamPutBit(bs, pParam->vol_flags & XVID_VOL_MPEGQUANT);
1225 : edgomez 1.14
1226 : edgomez 1.42 if ((pParam->vol_flags & XVID_VOL_MPEGQUANT)) {
1227 :     BitstreamPutBit(bs, is_custom_intra_matrix(pParam->mpeg_quant_matrices)); /* load_intra_quant_mat */
1228 :     if(is_custom_intra_matrix(pParam->mpeg_quant_matrices))
1229 :     bs_put_matrix(bs, get_intra_matrix(pParam->mpeg_quant_matrices));
1230 : Isibaar 1.1
1231 : edgomez 1.42 BitstreamPutBit(bs, is_custom_inter_matrix(pParam->mpeg_quant_matrices)); /* load_inter_quant_mat */
1232 :     if(is_custom_inter_matrix(pParam->mpeg_quant_matrices))
1233 :     bs_put_matrix(bs, get_inter_matrix(pParam->mpeg_quant_matrices));
1234 : Isibaar 1.1 }
1235 :    
1236 : edgomez 1.38 if (vol_ver_id != 1) {
1237 : edgomez 1.42 if ((pParam->vol_flags & XVID_VOL_QUARTERPEL))
1238 :     BitstreamPutBit(bs, 1); /* quarterpel */
1239 : edgomez 1.38 else
1240 : edgomez 1.42 BitstreamPutBit(bs, 0); /* no quarterpel */
1241 : edgomez 1.38 }
1242 :    
1243 : edgomez 1.42 BitstreamPutBit(bs, 1); /* complexity_estimation_disable */
1244 :     BitstreamPutBit(bs, 1); /* resync_marker_disable */
1245 :     BitstreamPutBit(bs, 0); /* data_partitioned */
1246 : edgomez 1.38
1247 : edgomez 1.42 if (vol_ver_id != 1) {
1248 :     BitstreamPutBit(bs, 0); /* newpred_enable */
1249 :     BitstreamPutBit(bs, (pParam->vol_flags & XVID_VOL_REDUCED_ENABLE)?1:0);
1250 : edgomez 1.38 /* reduced_resolution_vop_enabled */
1251 :     }
1252 :    
1253 : edgomez 1.42 BitstreamPutBit(bs, 0); /* scalability */
1254 :    
1255 :     BitstreamPadAlways(bs); /* next_start_code(); */
1256 : edgomez 1.41
1257 : edgomez 1.38 /* fake divx5 id, to ensure compatibility with divx5 decoder */
1258 : edgomez 1.42 #define DIVX5_ID "DivX999b000p"
1259 :     if (pParam->max_bframes > 0 && (pParam->global_flags & XVID_GLOBAL_PACKED)) {
1260 : edgomez 1.38 BitstreamWriteUserData(bs, DIVX5_ID, strlen(DIVX5_ID));
1261 :     }
1262 :    
1263 :     /* xvid id */
1264 : edgomez 1.42 {
1265 : edgomez 1.43 const char xvid_user_format[] = "XviD%04d%c";
1266 :     char xvid_user_data[100];
1267 :     sprintf(xvid_user_data,
1268 :     xvid_user_format,
1269 :     XVID_BS_VERSION,
1270 :     (frame->vop_flags & XVID_VOP_CARTOON)?'C':'\0');
1271 :     BitstreamWriteUserData(bs, xvid_user_data, strlen(xvid_user_data));
1272 : edgomez 1.42 }
1273 : Isibaar 1.1 }
1274 :    
1275 :    
1276 :     /*
1277 :     write vop header
1278 :     */
1279 : edgomez 1.14 void
1280 : edgomez 1.38 BitstreamWriteVopHeader(
1281 :     Bitstream * const bs,
1282 : edgomez 1.14 const MBParam * pParam,
1283 : edgomez 1.38 const FRAMEINFO * const frame,
1284 : edgomez 1.42 int vop_coded,
1285 :     unsigned int quant)
1286 : Isibaar 1.1 {
1287 : suxen_drol 1.8 uint32_t i;
1288 : chl 1.28
1289 : edgomez 1.42 #if 0
1290 :     BitstreamPad(bs);
1291 :     #endif
1292 :    
1293 :     /*
1294 :     * no padding here, anymore. You have to make sure that you are
1295 :     * byte aligned, and that always 1-8 padding bits have been written
1296 :     */
1297 : edgomez 1.38
1298 : edgomez 1.14 BitstreamPutBits(bs, VOP_START_CODE, 32);
1299 :    
1300 :     BitstreamPutBits(bs, frame->coding_type, 2);
1301 : edgomez 1.42 #if 0
1302 :     DPRINTF(XVID_DEBUG_HEADER, "coding_type = %i\n", frame->coding_type);
1303 :     #endif
1304 : Isibaar 1.1
1305 : chl 1.28 for (i = 0; i < frame->seconds; i++) {
1306 :     BitstreamPutBit(bs, 1);
1307 :     }
1308 :     BitstreamPutBit(bs, 0);
1309 : Isibaar 1.1
1310 :     WRITE_MARKER();
1311 :    
1312 : edgomez 1.42 /* time_increment: value=nth_of_sec, nbits = log2(resolution) */
1313 : edgomez 1.43 BitstreamPutBits(bs, frame->ticks, MAX(log2bin(pParam->fbase-1), 1));
1314 : edgomez 1.42 #if 0
1315 :     DPRINTF("[%i:%i] %c",
1316 :     frame->seconds, frame->ticks,
1317 :     frame->coding_type == I_VOP ? 'I' :
1318 :     frame->coding_type == P_VOP ? 'P' :
1319 :     frame->coding_type == S_VOP ? 'S' : 'B');
1320 :     #endif
1321 : Isibaar 1.1
1322 :     WRITE_MARKER();
1323 :    
1324 : suxen_drol 1.17 if (!vop_coded) {
1325 :     BitstreamPutBits(bs, 0, 1);
1326 : edgomez 1.41 #if 0
1327 :     BitstreamPadAlways(bs); /* next_start_code() */
1328 :     #endif
1329 :     /* NB: It's up to the function caller to write the next_start_code().
1330 :     * At the moment encoder.c respects that requisite because a VOP
1331 :     * always ends with a next_start_code either if it's coded or not
1332 :     * and encoder.c terminates a frame with a next_start_code in whatever
1333 :     * case */
1334 : suxen_drol 1.17 return;
1335 :     }
1336 :    
1337 : edgomez 1.42 BitstreamPutBits(bs, 1, 1); /* vop_coded */
1338 : Isibaar 1.1
1339 : edgomez 1.38 if ( (frame->coding_type == P_VOP) || (frame->coding_type == S_VOP) )
1340 : suxen_drol 1.7 BitstreamPutBits(bs, frame->rounding_type, 1);
1341 : Isibaar 1.1
1342 : edgomez 1.42 if ((frame->vol_flags & XVID_VOL_REDUCED_ENABLE))
1343 :     BitstreamPutBit(bs, (frame->vop_flags & XVID_VOP_REDUCED)?1:0);
1344 : edgomez 1.38
1345 : edgomez 1.42 BitstreamPutBits(bs, 0, 3); /* intra_dc_vlc_threshold */
1346 : edgomez 1.14
1347 : edgomez 1.42 if ((frame->vol_flags & XVID_VOL_INTERLACING)) {
1348 :     BitstreamPutBit(bs, (frame->vop_flags & XVID_VOP_TOPFIELDFIRST));
1349 :     BitstreamPutBit(bs, (frame->vop_flags & XVID_VOP_ALTERNATESCAN));
1350 : edgomez 1.38 }
1351 : edgomez 1.42
1352 : edgomez 1.38 if (frame->coding_type == S_VOP) {
1353 : edgomez 1.42 if (1) { /* no_of_sprite_warping_points>=1 (we use 2!) */
1354 : edgomez 1.38 int k;
1355 : edgomez 1.42 for (k=0;k<3;k++)
1356 : edgomez 1.38 {
1357 : edgomez 1.42 bs_put_spritetrajectory(bs, frame->warp.duv[k].x ); /* du[k] */
1358 : edgomez 1.38 WRITE_MARKER();
1359 : edgomez 1.42
1360 :     bs_put_spritetrajectory(bs, frame->warp.duv[k].y ); /* dv[k] */
1361 : edgomez 1.38 WRITE_MARKER();
1362 :    
1363 : edgomez 1.42 if ((frame->vol_flags & XVID_VOL_QUARTERPEL))
1364 : edgomez 1.38 {
1365 : 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);
1366 : edgomez 1.38 }
1367 :     else
1368 :     {
1369 : 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);
1370 : edgomez 1.38 }
1371 :     }
1372 :     }
1373 : h 1.4 }
1374 :    
1375 : edgomez 1.38
1376 : edgomez 1.42 #if 0
1377 :     DPRINTF(XVID_DEBUG_HEADER, "quant = %i\n", quant);
1378 :     #endif
1379 :    
1380 :     BitstreamPutBits(bs, quant, 5); /* quantizer */
1381 : edgomez 1.14
1382 : suxen_drol 1.7 if (frame->coding_type != I_VOP)
1383 : edgomez 1.42 BitstreamPutBits(bs, frame->fcode, 3); /* forward_fixed_code */
1384 : suxen_drol 1.8
1385 :     if (frame->coding_type == B_VOP)
1386 : edgomez 1.42 BitstreamPutBits(bs, frame->bcode, 3); /* backward_fixed_code */
1387 : edgomez 1.38
1388 :     }
1389 :    
1390 : edgomez 1.42 void
1391 :     BitstreamWriteUserData(Bitstream * const bs,
1392 :     uint8_t * data,
1393 : edgomez 1.38 const int length)
1394 :     {
1395 :     int i;
1396 :    
1397 :     BitstreamPad(bs);
1398 :     BitstreamPutBits(bs, USERDATA_START_CODE, 32);
1399 :    
1400 :     for (i = 0; i < length; i++) {
1401 :     BitstreamPutBits(bs, data[i], 8);
1402 :     }
1403 : suxen_drol 1.17
1404 : chl 1.24 }

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