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1 : Isibaar 1.1 /******************************************************************************
2 :     * *
3 :     * This file is part of XviD, a free MPEG-4 video encoder/decoder *
4 :     * *
5 :     * XviD is an implementation of a part of one or more MPEG-4 Video tools *
6 :     * as specified in ISO/IEC 14496-2 standard. Those intending to use this *
7 :     * software module in hardware or software products are advised that its *
8 :     * use may infringe existing patents or copyrights, and any such use *
9 :     * would be at such party's own risk. The original developer of this *
10 :     * software module and his/her company, and subsequent editors and their *
11 :     * companies, will have no liability for use of this software or *
12 :     * modifications or derivatives thereof. *
13 :     * *
14 :     * XviD is free software; you can redistribute it and/or modify it *
15 :     * under the terms of the GNU General Public License as published by *
16 :     * the Free Software Foundation; either version 2 of the License, or *
17 :     * (at your option) any later version. *
18 :     * *
19 :     * XviD is distributed in the hope that it will be useful, but *
20 :     * WITHOUT ANY WARRANTY; without even the implied warranty of *
21 :     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
22 :     * GNU General Public License for more details. *
23 :     * *
24 :     * You should have received a copy of the GNU General Public License *
25 :     * along with this program; if not, write to the Free Software *
26 :     * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA *
27 :     * *
28 :     ******************************************************************************/
29 :    
30 :     /******************************************************************************
31 :     * *
32 :     * bitstream.c *
33 :     * *
34 :     * Copyright (C) 2001 - Peter Ross <pross@cs.rmit.edu.au> *
35 :     * *
36 :     * For more information visit the XviD homepage: http://www.xvid.org *
37 :     * *
38 :     ******************************************************************************/
39 :    
40 :     /******************************************************************************
41 : chenm001 1.16 * *
42 : Isibaar 1.1 * Revision history: *
43 : chenm001 1.16 * *
44 : chenm001 1.23 * 11.07.2002 add VOP width & height return to dec when dec->width *
45 :     * or dec->height is 0 (for use in examples/ex1.c) *
46 :     * MinChen <chenm001@163.com> *
47 :     * 22.05.2002 bs_put_matrix fix *
48 : suxen_drol 1.17 * 20.05.2002 added BitstreamWriteUserData *
49 : chenm001 1.16 * 19.06.2002 Fix a little bug in use custom quant matrix *
50 :     * MinChen <chenm001@163.com> *
51 :     * 08.05.2002 add low_delay support for B_VOP decode *
52 : chenm001 1.13 * MinChen <chenm001@163.com> *
53 : suxen_drol 1.12 * 06.05.2002 low_delay *
54 : suxen_drol 1.11 * 06.05.2002 fixed fincr/fbase error *
55 :     * 01.05.2002 added BVOP support to BitstreamWriteVopHeader *
56 : chenm001 1.6 * 15.04.2002 rewrite log2bin use asm386 By MinChen <chenm001@163.com> *
57 : chenm001 1.16 * 26.03.2002 interlacing support *
58 :     * 03.03.2002 qmatrix writing *
59 :     * 03.03.2002 merged BITREADER and BITWRITER *
60 :     * 30.02.2002 intra_dc_threshold support *
61 :     * 04.12.2001 support for additional headers *
62 :     * 16.12.2001 inital version *
63 :     *
64 : Isibaar 1.1 ******************************************************************************/
65 :    
66 :    
67 :     #include "bitstream.h"
68 :     #include "zigzag.h"
69 : Isibaar 1.2 #include "../quant/quant_matrix.h"
70 : Isibaar 1.1
71 : chenm001 1.6
72 : edgomez 1.14 static uint32_t __inline
73 :     log2bin(uint32_t value)
74 : Isibaar 1.1 {
75 : chenm001 1.6 /* Changed by Chenm001 */
76 :     #ifndef WIN32
77 : Isibaar 1.1 int n = 0;
78 : edgomez 1.14
79 :     while (value) {
80 : Isibaar 1.1 value >>= 1;
81 :     n++;
82 :     }
83 :     return n;
84 : chenm001 1.6 #else
85 : edgomez 1.14 __asm {
86 : suxen_drol 1.15 bsr eax, value
87 :     inc eax
88 :     }
89 : chenm001 1.6 #endif
90 : Isibaar 1.1 }
91 :    
92 :    
93 : edgomez 1.14 static const uint32_t intra_dc_threshold_table[] = {
94 :     32, /* never use */
95 : Isibaar 1.1 13,
96 :     15,
97 :     17,
98 :     19,
99 :     21,
100 :     23,
101 :     1,
102 :     };
103 :    
104 :    
105 : edgomez 1.14 void
106 :     bs_get_matrix(Bitstream * bs,
107 :     uint8_t * matrix)
108 :     {
109 :     int i = 0;
110 :     int last, value = 0;
111 :    
112 :     do {
113 :     last = value;
114 :     value = BitstreamGetBits(bs, 8);
115 :     matrix[scan_tables[0][i++]] = value;
116 :     }
117 :     while (value != 0 && i < 64);
118 : chenm001 1.16 i--; // fix little bug at coeff not full
119 : edgomez 1.14
120 :     while (i < 64) {
121 :     matrix[scan_tables[0][i++]] = last;
122 :     }
123 :     }
124 : Isibaar 1.2
125 : suxen_drol 1.21
126 :    
127 :     // for PVOP addbits == fcode - 1
128 :     // for BVOP addbits == max(fcode,bcode) - 1
129 :     // returns mbpos
130 :     int
131 : suxen_drol 1.22 read_video_packet_header(Bitstream *bs, const int addbits, int * quant)
132 : suxen_drol 1.21 {
133 :     int nbits;
134 :     int mbnum;
135 :     int hec;
136 :    
137 : suxen_drol 1.22 nbits = NUMBITS_VP_RESYNC_MARKER + addbits;
138 : suxen_drol 1.21
139 :     BitstreamSkip(bs, BitstreamNumBitsToByteAlign(bs));
140 :     BitstreamSkip(bs, nbits);
141 :    
142 : suxen_drol 1.22 DPRINTF(DPRINTF_STARTCODE, "<video_packet_header>");
143 :    
144 : suxen_drol 1.21 // if (dec->shape != VIDOBJLAY_SHAPE_RECTANGULAR) {
145 :     // hec
146 :     // vop_width
147 :     // marker_bit
148 :     // vop_height
149 :     // marker_bit
150 :    
151 :     //}
152 :    
153 :     mbnum = BitstreamGetBits(bs, 9);
154 : suxen_drol 1.22 DPRINTF(DPRINTF_HEADER, "mbnum %i", mbnum);
155 : suxen_drol 1.21
156 :     // if (dec->shape != VIDOBJLAY_SHAPE_BINARYONLY)
157 : suxen_drol 1.22 *quant = BitstreamGetBits(bs, 5);
158 :     DPRINTF(DPRINTF_HEADER, "quant %i", *quant);
159 : suxen_drol 1.21
160 :     // if (dec->shape != VIDOBJLAY_SHAPE_RECTANGULAR)
161 :     hec = BitstreamGetBit(bs);
162 : suxen_drol 1.22 DPRINTF(DPRINTF_HEADER, "header_extension_code %i", hec);
163 : suxen_drol 1.21 // if (hec)
164 :     // .. decoder hec-header ...
165 :    
166 :     return mbnum;
167 :     }
168 :    
169 :    
170 :    
171 : Isibaar 1.1 /*
172 :     decode headers
173 :     returns coding_type, or -1 if error
174 :     */
175 :    
176 : suxen_drol 1.22 #define VIDOBJ_START_CODE_MASK 0x0000001f
177 :     #define VIDOBJLAY_START_CODE_MASK 0x0000000f
178 :    
179 : edgomez 1.14 int
180 :     BitstreamReadHeaders(Bitstream * bs,
181 :     DECODER * dec,
182 :     uint32_t * rounding,
183 :     uint32_t * quant,
184 :     uint32_t * fcode_forward,
185 :     uint32_t * fcode_backward,
186 :     uint32_t * intra_dc_threshold)
187 : Isibaar 1.1 {
188 :     uint32_t vol_ver_id;
189 : chenm001 1.9 static uint32_t time_increment_resolution;
190 : Isibaar 1.1 uint32_t coding_type;
191 :     uint32_t start_code;
192 : edgomez 1.14 uint32_t time_incr = 0;
193 :     int32_t time_increment;
194 : chenm001 1.9
195 : edgomez 1.14 do {
196 : Isibaar 1.1 BitstreamByteAlign(bs);
197 :     start_code = BitstreamShowBits(bs, 32);
198 :    
199 : edgomez 1.14 if (start_code == VISOBJSEQ_START_CODE) {
200 : suxen_drol 1.22
201 :     int profile;
202 :    
203 :     DPRINTF(DPRINTF_STARTCODE, "<visual_object_sequence>");
204 :    
205 : edgomez 1.14 BitstreamSkip(bs, 32); // visual_object_sequence_start_code
206 : suxen_drol 1.22 profile = BitstreamGetBits(bs, 8); // profile_and_level_indication
207 :    
208 :     DPRINTF(DPRINTF_HEADER, "profile_and_level_indication %i", profile);
209 :    
210 : edgomez 1.14 } else if (start_code == VISOBJSEQ_STOP_CODE) {
211 : suxen_drol 1.22
212 : edgomez 1.14 BitstreamSkip(bs, 32); // visual_object_sequence_stop_code
213 : suxen_drol 1.22
214 :     DPRINTF(DPRINTF_STARTCODE, "</visual_object_sequence>");
215 :    
216 : edgomez 1.14 } else if (start_code == VISOBJ_START_CODE) {
217 : suxen_drol 1.22
218 :     DPRINTF(DPRINTF_STARTCODE, "<visual_object>");
219 :    
220 : edgomez 1.14 BitstreamSkip(bs, 32); // visual_object_start_code
221 :     if (BitstreamGetBit(bs)) // is_visual_object_identified
222 : Isibaar 1.1 {
223 : edgomez 1.14 vol_ver_id = BitstreamGetBits(bs, 4); // visual_object_ver_id
224 : suxen_drol 1.22 DPRINTF(DPRINTF_HEADER,"ver_id %i", vol_ver_id);
225 : edgomez 1.14 BitstreamSkip(bs, 3); // visual_object_priority
226 :     } else {
227 : Isibaar 1.1 vol_ver_id = 1;
228 :     }
229 :    
230 :     if (BitstreamShowBits(bs, 4) != VISOBJ_TYPE_VIDEO) // visual_object_type
231 :     {
232 : suxen_drol 1.22 DPRINTF(DPRINTF_ERROR, "visual_object_type != video");
233 : Isibaar 1.1 return -1;
234 :     }
235 :     BitstreamSkip(bs, 4);
236 :    
237 :     // video_signal_type
238 :    
239 : edgomez 1.14 if (BitstreamGetBit(bs)) // video_signal_type
240 : Isibaar 1.1 {
241 : suxen_drol 1.22 DPRINTF(DPRINTF_HEADER,"+ video_signal_type");
242 : edgomez 1.14 BitstreamSkip(bs, 3); // video_format
243 :     BitstreamSkip(bs, 1); // video_range
244 :     if (BitstreamGetBit(bs)) // color_description
245 : Isibaar 1.1 {
246 : suxen_drol 1.22 DPRINTF(DPRINTF_HEADER,"+ color_description");
247 : edgomez 1.14 BitstreamSkip(bs, 8); // color_primaries
248 :     BitstreamSkip(bs, 8); // transfer_characteristics
249 :     BitstreamSkip(bs, 8); // matrix_coefficients
250 : Isibaar 1.1 }
251 :     }
252 : suxen_drol 1.22 } else if ((start_code & ~VIDOBJ_START_CODE_MASK) == VIDOBJ_START_CODE) {
253 :    
254 :     DPRINTF(DPRINTF_STARTCODE, "<video_object>");
255 :     DPRINTF(DPRINTF_HEADER, "vo id %i", start_code & VIDOBJ_START_CODE_MASK);
256 :    
257 : edgomez 1.14 BitstreamSkip(bs, 32); // video_object_start_code
258 : suxen_drol 1.22
259 :     } else if ((start_code & ~VIDOBJLAY_START_CODE_MASK) == VIDOBJLAY_START_CODE) {
260 :    
261 :     DPRINTF(DPRINTF_STARTCODE, "<video_object_layer>");
262 :     DPRINTF(DPRINTF_HEADER, "vol id %i", start_code & VIDOBJLAY_START_CODE_MASK);
263 :    
264 : edgomez 1.14 BitstreamSkip(bs, 32); // video_object_layer_start_code
265 : Isibaar 1.1
266 : edgomez 1.14 BitstreamSkip(bs, 1); // random_accessible_vol
267 : Isibaar 1.1
268 :     // video_object_type_indication
269 : edgomez 1.14 if (BitstreamShowBits(bs, 8) != VIDOBJLAY_TYPE_SIMPLE && BitstreamShowBits(bs, 8) != VIDOBJLAY_TYPE_CORE && BitstreamShowBits(bs, 8) != VIDOBJLAY_TYPE_MAIN && BitstreamShowBits(bs, 8) != 0) // BUGGY DIVX
270 : Isibaar 1.1 {
271 : suxen_drol 1.22 DPRINTF(DPRINTF_ERROR,"video_object_type_indication %i not supported ",
272 :     BitstreamShowBits(bs, 8));
273 : Isibaar 1.1 return -1;
274 :     }
275 :     BitstreamSkip(bs, 8);
276 :    
277 :    
278 : edgomez 1.14 if (BitstreamGetBit(bs)) // is_object_layer_identifier
279 : Isibaar 1.1 {
280 : suxen_drol 1.22 DPRINTF(DPRINTF_HEADER, "+ is_object_layer_identifier");
281 : edgomez 1.14 vol_ver_id = BitstreamGetBits(bs, 4); // video_object_layer_verid
282 : suxen_drol 1.22 DPRINTF(DPRINTF_HEADER,"ver_id %i", vol_ver_id);
283 : edgomez 1.14 BitstreamSkip(bs, 3); // video_object_layer_priority
284 :     } else {
285 : Isibaar 1.1 vol_ver_id = 1;
286 :     }
287 :    
288 :     if (BitstreamGetBits(bs, 4) == VIDOBJLAY_AR_EXTPAR) // aspect_ratio_info
289 :     {
290 : suxen_drol 1.22 DPRINTF(DPRINTF_HEADER, "+ aspect_ratio_info");
291 : edgomez 1.14 BitstreamSkip(bs, 8); // par_width
292 :     BitstreamSkip(bs, 8); // par_height
293 : Isibaar 1.1 }
294 :    
295 : edgomez 1.14 if (BitstreamGetBit(bs)) // vol_control_parameters
296 : Isibaar 1.1 {
297 : suxen_drol 1.22 DPRINTF(DPRINTF_HEADER, "+ vol_control_parameters");
298 : edgomez 1.14 BitstreamSkip(bs, 2); // chroma_format
299 :     dec->low_delay = BitstreamGetBit(bs); // low_delay
300 : suxen_drol 1.22 DPRINTF(DPRINTF_HEADER, "low_delay %i", dec->low_delay);
301 : edgomez 1.14 if (BitstreamGetBit(bs)) // vbv_parameters
302 : Isibaar 1.1 {
303 : suxen_drol 1.22 DPRINTF(DPRINTF_HEADER,"+ vbv_parameters");
304 : edgomez 1.14 BitstreamSkip(bs, 15); // first_half_bitrate
305 : Isibaar 1.1 READ_MARKER();
306 : edgomez 1.14 BitstreamSkip(bs, 15); // latter_half_bitrate
307 : Isibaar 1.1 READ_MARKER();
308 : edgomez 1.14 BitstreamSkip(bs, 15); // first_half_vbv_buffer_size
309 : Isibaar 1.1 READ_MARKER();
310 : edgomez 1.14 BitstreamSkip(bs, 3); // latter_half_vbv_buffer_size
311 :     BitstreamSkip(bs, 11); // first_half_vbv_occupancy
312 : Isibaar 1.1 READ_MARKER();
313 : edgomez 1.14 BitstreamSkip(bs, 15); // latter_half_vbv_occupancy
314 : Isibaar 1.1 READ_MARKER();
315 : edgomez 1.14
316 : Isibaar 1.1 }
317 :     }
318 :    
319 :     dec->shape = BitstreamGetBits(bs, 2); // video_object_layer_shape
320 : suxen_drol 1.22 DPRINTF(DPRINTF_HEADER, "shape %i", dec->shape);
321 : edgomez 1.14
322 :     if (dec->shape == VIDOBJLAY_SHAPE_GRAYSCALE && vol_ver_id != 1) {
323 :     BitstreamSkip(bs, 4); // video_object_layer_shape_extension
324 : Isibaar 1.1 }
325 :    
326 :     READ_MARKER();
327 :    
328 : chenm001 1.9 // *************************** for decode B-frame time ***********************
329 :     time_increment_resolution = BitstreamGetBits(bs, 16); // vop_time_increment_resolution
330 : suxen_drol 1.22
331 :     DPRINTF(DPRINTF_HEADER,"vop_time_increment_resolution %i", time_increment_resolution);
332 :    
333 : chl 1.24 // time_increment_resolution--;
334 : suxen_drol 1.22
335 : edgomez 1.14 if (time_increment_resolution > 0) {
336 : chl 1.24 dec->time_inc_bits = log2bin(time_increment_resolution-1);
337 : edgomez 1.14 } else {
338 : Isibaar 1.1 // dec->time_inc_bits = 0;
339 :     // for "old" xvid compatibility, set time_inc_bits = 1
340 :     dec->time_inc_bits = 1;
341 :     }
342 :    
343 :     READ_MARKER();
344 :    
345 : edgomez 1.14 if (BitstreamGetBit(bs)) // fixed_vop_rate
346 : Isibaar 1.1 {
347 : suxen_drol 1.22 DPRINTF(DPRINTF_HEADER, "+ fixed_vop_rate");
348 : Isibaar 1.1 BitstreamSkip(bs, dec->time_inc_bits); // fixed_vop_time_increment
349 :     }
350 :    
351 : edgomez 1.14 if (dec->shape != VIDOBJLAY_SHAPE_BINARY_ONLY) {
352 : Isibaar 1.1
353 : edgomez 1.14 if (dec->shape == VIDOBJLAY_SHAPE_RECTANGULAR) {
354 : Isibaar 1.1 uint32_t width, height;
355 :    
356 :     READ_MARKER();
357 : edgomez 1.14 width = BitstreamGetBits(bs, 13); // video_object_layer_width
358 : Isibaar 1.1 READ_MARKER();
359 : edgomez 1.14 height = BitstreamGetBits(bs, 13); // video_object_layer_height
360 : Isibaar 1.1 READ_MARKER();
361 :    
362 : suxen_drol 1.22 DPRINTF(DPRINTF_HEADER, "width %i", width);
363 :     DPRINTF(DPRINTF_HEADER, "height %i", height);
364 : chenm001 1.23
365 :     // for auto set width & height
366 :     if (dec->width == 0)
367 :     dec->width = width;
368 :     if (dec->height == 0)
369 :     dec->height = height;
370 : suxen_drol 1.22
371 : edgomez 1.14 if (width != dec->width || height != dec->height) {
372 : suxen_drol 1.22 DPRINTF(DPRINTF_ERROR, "XVID_DEC_PARAM width/height does not match bitstream");
373 : Isibaar 1.1 return -1;
374 :     }
375 :    
376 :     }
377 : h 1.4
378 : suxen_drol 1.22 dec->interlacing = BitstreamGetBit(bs);
379 :     DPRINTF(DPRINTF_HEADER, "interlace", dec->interlacing);
380 : Isibaar 1.1
381 : edgomez 1.14 if (!BitstreamGetBit(bs)) // obmc_disable
382 : Isibaar 1.1 {
383 : suxen_drol 1.22 DPRINTF(DPRINTF_ERROR, "obmc_disabled==false not supported");
384 : Isibaar 1.1 // TODO
385 :     // fucking divx4.02 has this enabled
386 :     }
387 :    
388 : edgomez 1.14 if (BitstreamGetBits(bs, (vol_ver_id == 1 ? 1 : 2))) // sprite_enable
389 : Isibaar 1.1 {
390 : suxen_drol 1.22 DPRINTF(DPRINTF_ERROR, "spriate_enabled not supported");
391 : Isibaar 1.1 return -1;
392 :     }
393 : edgomez 1.14
394 :     if (vol_ver_id != 1 &&
395 :     dec->shape != VIDOBJLAY_SHAPE_RECTANGULAR) {
396 :     BitstreamSkip(bs, 1); // sadct_disable
397 : Isibaar 1.1 }
398 :    
399 : edgomez 1.14 if (BitstreamGetBit(bs)) // not_8_bit
400 : Isibaar 1.1 {
401 : suxen_drol 1.22 DPRINTF(DPRINTF_HEADER, "not_8_bit==true (ignored)");
402 : Isibaar 1.1 dec->quant_bits = BitstreamGetBits(bs, 4); // quant_precision
403 : edgomez 1.14 BitstreamSkip(bs, 4); // bits_per_pixel
404 :     } else {
405 : Isibaar 1.1 dec->quant_bits = 5;
406 :     }
407 :    
408 : edgomez 1.14 if (dec->shape == VIDOBJLAY_SHAPE_GRAYSCALE) {
409 :     BitstreamSkip(bs, 1); // no_gray_quant_update
410 :     BitstreamSkip(bs, 1); // composition_method
411 :     BitstreamSkip(bs, 1); // linear_composition
412 : Isibaar 1.1 }
413 :    
414 : edgomez 1.14 dec->quant_type = BitstreamGetBit(bs); // quant_type
415 : suxen_drol 1.22 DPRINTF(DPRINTF_HEADER, "quant_type %i", dec->quant_type);
416 : Isibaar 1.1
417 : edgomez 1.14 if (dec->quant_type) {
418 :     if (BitstreamGetBit(bs)) // load_intra_quant_mat
419 : Isibaar 1.1 {
420 : Isibaar 1.3 uint8_t matrix[64];
421 : edgomez 1.14
422 : suxen_drol 1.22 DPRINTF(DPRINTF_HEADER, "load_intra_quant_mat");
423 :    
424 : Isibaar 1.2 bs_get_matrix(bs, matrix);
425 :     set_intra_matrix(matrix);
426 : edgomez 1.14 } else
427 : Isibaar 1.3 set_intra_matrix(get_default_intra_matrix());
428 : Isibaar 1.2
429 : edgomez 1.14 if (BitstreamGetBit(bs)) // load_inter_quant_mat
430 : Isibaar 1.1 {
431 : edgomez 1.14 uint8_t matrix[64];
432 : suxen_drol 1.22
433 :     DPRINTF(DPRINTF_HEADER, "load_inter_quant_mat");
434 : edgomez 1.14
435 : Isibaar 1.2 bs_get_matrix(bs, matrix);
436 :     set_inter_matrix(matrix);
437 : edgomez 1.14 } else
438 : Isibaar 1.3 set_inter_matrix(get_default_inter_matrix());
439 : Isibaar 1.1
440 : edgomez 1.14 if (dec->shape == VIDOBJLAY_SHAPE_GRAYSCALE) {
441 : suxen_drol 1.22 DPRINTF(DPRINTF_ERROR, "greyscale matrix not supported");
442 : Isibaar 1.1 return -1;
443 :     }
444 : Isibaar 1.2
445 : Isibaar 1.1 }
446 :    
447 : edgomez 1.14
448 :     if (vol_ver_id != 1) {
449 : Isibaar 1.26 DEBUG("QUARTERPEL BITSTREAM");
450 :     dec->quarterpel = BitstreamGetBit(bs); // quarter_sample
451 :     }
452 :     else
453 : Isibaar 1.1 dec->quarterpel = 0;
454 : Isibaar 1.26
455 : Isibaar 1.1
456 : edgomez 1.14 if (!BitstreamGetBit(bs)) // complexity_estimation_disable
457 : Isibaar 1.1 {
458 : suxen_drol 1.22 DPRINTF(DPRINTF_ERROR, "complexity_estimation not supported");
459 : Isibaar 1.1 return -1;
460 :     }
461 :    
462 : suxen_drol 1.22 BitstreamSkip(bs, 1); // resync_marker_disable
463 : Isibaar 1.1
464 : edgomez 1.14 if (BitstreamGetBit(bs)) // data_partitioned
465 : Isibaar 1.1 {
466 : suxen_drol 1.22 DPRINTF(DPRINTF_ERROR, "data_partitioned not supported");
467 : edgomez 1.14 BitstreamSkip(bs, 1); // reversible_vlc
468 : Isibaar 1.1 }
469 :    
470 : edgomez 1.14 if (vol_ver_id != 1) {
471 :     if (BitstreamGetBit(bs)) // newpred_enable
472 : Isibaar 1.1 {
473 : suxen_drol 1.22 DPRINTF(DPRINTF_HEADER, "+ newpred_enable");
474 : edgomez 1.14 BitstreamSkip(bs, 2); // requested_upstream_message_type
475 :     BitstreamSkip(bs, 1); // newpred_segment_type
476 : Isibaar 1.1 }
477 : edgomez 1.14 if (BitstreamGetBit(bs)) // reduced_resolution_vop_enable
478 : Isibaar 1.1 {
479 : suxen_drol 1.22 DPRINTF(DPRINTF_ERROR, "reduced_resolution_vop not supported");
480 : Isibaar 1.1 return -1;
481 :     }
482 :     }
483 : edgomez 1.14
484 :     if ((dec->scalability = BitstreamGetBit(bs))) // scalability
485 : Isibaar 1.1 {
486 : suxen_drol 1.22 DPRINTF(DPRINTF_ERROR, "scalability not supported");
487 : Isibaar 1.1 return -1;
488 :     }
489 : edgomez 1.14 } else // dec->shape == BINARY_ONLY
490 : Isibaar 1.1 {
491 : edgomez 1.14 if (vol_ver_id != 1) {
492 : Isibaar 1.1 if (BitstreamGetBit(bs)) // scalability
493 :     {
494 : suxen_drol 1.22 DPRINTF(DPRINTF_ERROR, "scalability not supported");
495 : Isibaar 1.1 return -1;
496 :     }
497 :     }
498 : edgomez 1.14 BitstreamSkip(bs, 1); // resync_marker_disable
499 : Isibaar 1.1
500 :     }
501 :    
502 : edgomez 1.14 } else if (start_code == GRPOFVOP_START_CODE) {
503 : suxen_drol 1.22
504 :     DPRINTF(DPRINTF_STARTCODE, "<group_of_vop>");
505 :    
506 : Isibaar 1.1 BitstreamSkip(bs, 32);
507 :     {
508 :     int hours, minutes, seconds;
509 : edgomez 1.14
510 : Isibaar 1.1 hours = BitstreamGetBits(bs, 5);
511 :     minutes = BitstreamGetBits(bs, 6);
512 :     READ_MARKER();
513 :     seconds = BitstreamGetBits(bs, 6);
514 : suxen_drol 1.22
515 :     DPRINTF(DPRINTF_HEADER, "time %ih%im%is", hours);
516 : Isibaar 1.1 }
517 : edgomez 1.14 BitstreamSkip(bs, 1); // closed_gov
518 :     BitstreamSkip(bs, 1); // broken_link
519 : suxen_drol 1.22
520 : edgomez 1.14 } else if (start_code == VOP_START_CODE) {
521 : suxen_drol 1.22
522 :     DPRINTF(DPRINTF_STARTCODE, "<vop>");
523 :    
524 : edgomez 1.14 BitstreamSkip(bs, 32); // vop_start_code
525 : Isibaar 1.1
526 : edgomez 1.14 coding_type = BitstreamGetBits(bs, 2); // vop_coding_type
527 : suxen_drol 1.22 DPRINTF(DPRINTF_HEADER, "coding_type %i", coding_type);
528 : Isibaar 1.1
529 : chenm001 1.9 // *************************** for decode B-frame time ***********************
530 : edgomez 1.14 while (BitstreamGetBit(bs) != 0) // time_base
531 : chenm001 1.9 time_incr++;
532 : edgomez 1.14
533 : Isibaar 1.1 READ_MARKER();
534 : edgomez 1.14
535 :     if (dec->time_inc_bits) {
536 : chenm001 1.9 time_increment = (BitstreamGetBits(bs, dec->time_inc_bits)); // vop_time_increment
537 :     }
538 : suxen_drol 1.19
539 : suxen_drol 1.22 DPRINTF(DPRINTF_HEADER, "time_base %i", time_incr);
540 :     DPRINTF(DPRINTF_HEADER, "time_increment %i", time_increment);
541 :    
542 :     DPRINTF(DPRINTF_TIMECODE, "%c %i:%i",
543 : suxen_drol 1.19 coding_type == I_VOP ? 'I' : coding_type == P_VOP ? 'P' : 'B',
544 :     time_incr, time_increment);
545 :    
546 : edgomez 1.14 if (coding_type != B_VOP) {
547 :     dec->last_time_base = dec->time_base;
548 : chenm001 1.9 dec->time_base += time_incr;
549 : chl 1.25 dec->time = time_increment;
550 :    
551 :     /* dec->time_base * time_increment_resolution +
552 : edgomez 1.14 time_increment;
553 : chl 1.25 */ dec->time_pp = (uint32_t)
554 : chl 1.24 (time_increment_resolution + dec->time - dec->last_non_b_time)%time_increment_resolution;
555 : edgomez 1.14 dec->last_non_b_time = dec->time;
556 :     } else {
557 : chl 1.25 dec->time = time_increment;
558 :     /*
559 : edgomez 1.14 (dec->last_time_base +
560 : chl 1.25 time_incr) * time_increment_resolution + time_increment;
561 :     */
562 : chl 1.24 dec->time_bp = (uint32_t)
563 :     (time_increment_resolution + dec->last_non_b_time - dec->time)%time_increment_resolution;
564 : Isibaar 1.1 }
565 :    
566 :     READ_MARKER();
567 :    
568 : edgomez 1.14 if (!BitstreamGetBit(bs)) // vop_coded
569 : Isibaar 1.1 {
570 : suxen_drol 1.22 DPRINTF(DPRINTF_HEADER, "vop_coded==false");
571 : Isibaar 1.1 return N_VOP;
572 :     }
573 :    
574 :     /* if (newpred_enable)
575 : edgomez 1.14 {
576 :     }
577 :     */
578 : Isibaar 1.1
579 : chenm001 1.9 // fix a little bug by MinChen <chenm002@163.com>
580 : edgomez 1.14 if ((dec->shape != VIDOBJLAY_SHAPE_BINARY_ONLY) &&
581 :     (coding_type == P_VOP)) {
582 : Isibaar 1.1 *rounding = BitstreamGetBit(bs); // rounding_type
583 : suxen_drol 1.22 DPRINTF(DPRINTF_HEADER, "rounding %i", *rounding);
584 : Isibaar 1.1 }
585 :    
586 :     /* if (reduced_resolution_enable)
587 : edgomez 1.14 {
588 :     }
589 :     */
590 : Isibaar 1.1
591 : edgomez 1.14 if (dec->shape != VIDOBJLAY_SHAPE_RECTANGULAR) {
592 : Isibaar 1.1 uint32_t width, height;
593 :     uint32_t horiz_mc_ref, vert_mc_ref;
594 : edgomez 1.14
595 : Isibaar 1.1 width = BitstreamGetBits(bs, 13);
596 :     READ_MARKER();
597 :     height = BitstreamGetBits(bs, 13);
598 :     READ_MARKER();
599 :     horiz_mc_ref = BitstreamGetBits(bs, 13);
600 :     READ_MARKER();
601 :     vert_mc_ref = BitstreamGetBits(bs, 13);
602 :     READ_MARKER();
603 :    
604 : suxen_drol 1.22 DPRINTF(DPRINTF_HEADER, "width %i", width);
605 :     DPRINTF(DPRINTF_HEADER, "height %i", height);
606 :     DPRINTF(DPRINTF_HEADER, "horiz_mc_ref %i", horiz_mc_ref);
607 :     DPRINTF(DPRINTF_HEADER, "vert_mc_ref %i", vert_mc_ref);
608 : Isibaar 1.1
609 : edgomez 1.14 BitstreamSkip(bs, 1); // change_conv_ratio_disable
610 :     if (BitstreamGetBit(bs)) // vop_constant_alpha
611 : Isibaar 1.1 {
612 : edgomez 1.14 BitstreamSkip(bs, 8); // vop_constant_alpha_value
613 : Isibaar 1.1 }
614 :     }
615 :    
616 : edgomez 1.14
617 :     if (dec->shape != VIDOBJLAY_SHAPE_BINARY_ONLY) {
618 : Isibaar 1.1 // intra_dc_vlc_threshold
619 : edgomez 1.14 *intra_dc_threshold =
620 :     intra_dc_threshold_table[BitstreamGetBits(bs, 3)];
621 : Isibaar 1.1
622 : edgomez 1.14 if (dec->interlacing) {
623 : suxen_drol 1.22 dec->top_field_first = BitstreamGetBit(bs);
624 :     DPRINTF(DPRINTF_HEADER, "interlace top_field_first %i", dec->top_field_first);
625 :     dec->alternate_vertical_scan = BitstreamGetBit(bs);
626 :     DPRINTF(DPRINTF_HEADER, "interlace alternate_vertical_scan %i", dec->alternate_vertical_scan);
627 :    
628 : h 1.4 }
629 : Isibaar 1.1 }
630 : edgomez 1.14
631 :     if ((*quant = BitstreamGetBits(bs, dec->quant_bits)) < 1) // vop_quant
632 : Isibaar 1.10 *quant = 1;
633 :    
634 : suxen_drol 1.22 DPRINTF(DPRINTF_HEADER, "quant %i", *quant);
635 : edgomez 1.14
636 :     if (coding_type != I_VOP) {
637 :     *fcode_forward = BitstreamGetBits(bs, 3); // fcode_forward
638 : suxen_drol 1.22 DPRINTF(DPRINTF_HEADER, "fcode_forward %i", *fcode_forward);
639 : Isibaar 1.1 }
640 : edgomez 1.14
641 :     if (coding_type == B_VOP) {
642 :     *fcode_backward = BitstreamGetBits(bs, 3); // fcode_backward
643 : suxen_drol 1.22 DPRINTF(DPRINTF_HEADER, "fcode_backward %i", *fcode_backward);
644 : chenm001 1.9 }
645 : edgomez 1.14 if (!dec->scalability) {
646 :     if ((dec->shape != VIDOBJLAY_SHAPE_RECTANGULAR) &&
647 :     (coding_type != I_VOP)) {
648 :     BitstreamSkip(bs, 1); // vop_shape_coding_type
649 : chenm001 1.9 }
650 : Isibaar 1.1 }
651 :     return coding_type;
652 : suxen_drol 1.22
653 : edgomez 1.14 } else if (start_code == USERDATA_START_CODE) {
654 : suxen_drol 1.22
655 :     DPRINTF(DPRINTF_STARTCODE, "<user_data>");
656 :    
657 : edgomez 1.14 BitstreamSkip(bs, 32); // user_data_start_code
658 : suxen_drol 1.22
659 : edgomez 1.14 } else // start_code == ?
660 : Isibaar 1.1 {
661 : edgomez 1.14 if (BitstreamShowBits(bs, 24) == 0x000001) {
662 : suxen_drol 1.22 DPRINTF(DPRINTF_STARTCODE, "<unknown: %x>", BitstreamShowBits(bs, 32));
663 : Isibaar 1.1 }
664 :     BitstreamSkip(bs, 8);
665 :     }
666 :     }
667 :     while ((BitstreamPos(bs) >> 3) < bs->length);
668 :    
669 : suxen_drol 1.18 //DPRINTF("*** WARNING: no vop_start_code found");
670 : edgomez 1.14 return -1; /* ignore it */
671 : Isibaar 1.1 }
672 :    
673 :    
674 :     /* write custom quant matrix */
675 :    
676 : edgomez 1.14 static void
677 :     bs_put_matrix(Bitstream * bs,
678 :     const int16_t * matrix)
679 : Isibaar 1.1 {
680 :     int i, j;
681 :     const int last = matrix[scan_tables[0][63]];
682 :    
683 : suxen_drol 1.18 for (j = 63; j > 0 && matrix[scan_tables[0][j - 1]] == last; j--);
684 : Isibaar 1.1
685 : edgomez 1.14 for (i = 0; i <= j; i++) {
686 : Isibaar 1.1 BitstreamPutBits(bs, matrix[scan_tables[0][i]], 8);
687 :     }
688 :    
689 : edgomez 1.14 if (j < 63) {
690 : Isibaar 1.1 BitstreamPutBits(bs, 0, 8);
691 :     }
692 :     }
693 :    
694 :    
695 :     /*
696 :     write vol header
697 :     */
698 : edgomez 1.14 void
699 :     BitstreamWriteVolHeader(Bitstream * const bs,
700 :     const MBParam * pParam,
701 :     const FRAMEINFO * frame)
702 : Isibaar 1.1 {
703 :     // video object_start_code & vo_id
704 : edgomez 1.14 BitstreamPad(bs);
705 : Isibaar 1.1 BitstreamPutBits(bs, VO_START_CODE, 27);
706 : edgomez 1.14 BitstreamPutBits(bs, 0, 5);
707 : Isibaar 1.1
708 :     // video_object_layer_start_code & vol_id
709 :     BitstreamPutBits(bs, VOL_START_CODE, 28);
710 :     BitstreamPutBits(bs, 0, 4);
711 :    
712 : edgomez 1.14 BitstreamPutBit(bs, 0); // random_accessible_vol
713 :     BitstreamPutBits(bs, 0, 8); // video_object_type_indication
714 :     BitstreamPutBit(bs, 0); // is_object_layer_identified (0=not given)
715 :     BitstreamPutBits(bs, 1, 4); // aspect_ratio_info (1=1:1)
716 : suxen_drol 1.12
717 : chl 1.28 BitstreamPutBit(bs, 1); // vol_control_parameters
718 :     BitstreamPutBits(bs, 1, 2); // chroma_format 1="4:2:0"
719 :    
720 : suxen_drol 1.12 #ifdef BFRAMES
721 : edgomez 1.14 if (pParam->max_bframes > 0) {
722 :     BitstreamPutBit(bs, 0); // low_delay
723 :     } else
724 : suxen_drol 1.12 #endif
725 :     {
726 : chl 1.27 BitstreamPutBit(bs, 1); // low_delay
727 : suxen_drol 1.12 }
728 : chl 1.28 BitstreamPutBit(bs, 0); // vbv_parameters (0=not given)
729 : suxen_drol 1.12
730 : edgomez 1.14 BitstreamPutBits(bs, 0, 2); // video_object_layer_shape (0=rectangular)
731 : Isibaar 1.1
732 :     WRITE_MARKER();
733 : edgomez 1.14
734 : Isibaar 1.1 /* time_increment_resolution; ignored by current decore versions
735 : edgomez 1.14 eg. 2fps res=2 inc=1
736 :     25fps res=25 inc=1
737 :     29.97fps res=30000 inc=1001
738 :     */
739 : suxen_drol 1.11 #ifdef BFRAMES
740 :     BitstreamPutBits(bs, pParam->fbase, 16);
741 :     #else
742 : chl 1.28 BitstreamPutBits(bs, pParam->fbase, 16);
743 : suxen_drol 1.11 #endif
744 : Isibaar 1.1
745 :     WRITE_MARKER();
746 :    
747 : suxen_drol 1.20 #ifdef BFRAMES
748 :     BitstreamPutBit(bs, 1); // fixed_vop_rate = 1
749 :     BitstreamPutBits(bs, pParam->fincr, log2bin(pParam->fbase)); // fixed_vop_time_increment
750 :     #else
751 : chl 1.28 BitstreamPutBit(bs, 1); // fixed_vop_rate = 1
752 :     BitstreamPutBits(bs, pParam->fincr, log2bin(pParam->fbase)); // fixed_vop_time_increment
753 : suxen_drol 1.20 #endif
754 : Isibaar 1.1
755 :     WRITE_MARKER();
756 : edgomez 1.14 BitstreamPutBits(bs, pParam->width, 13); // width
757 : Isibaar 1.1 WRITE_MARKER();
758 : edgomez 1.14 BitstreamPutBits(bs, pParam->height, 13); // height
759 : Isibaar 1.1 WRITE_MARKER();
760 : edgomez 1.14
761 :     BitstreamPutBit(bs, frame->global_flags & XVID_INTERLACING); // interlace
762 : Isibaar 1.1 BitstreamPutBit(bs, 1); // obmc_disable (overlapped block motion compensation)
763 :     BitstreamPutBit(bs, 0); // sprite_enable
764 :     BitstreamPutBit(bs, 0); // not_in_bit
765 :    
766 :     // quant_type 0=h.263 1=mpeg4(quantizer tables)
767 : suxen_drol 1.7 BitstreamPutBit(bs, pParam->m_quant_type);
768 : edgomez 1.14
769 :     if (pParam->m_quant_type) {
770 : Isibaar 1.2 BitstreamPutBit(bs, get_intra_matrix_status()); // load_intra_quant_mat
771 : edgomez 1.14 if (get_intra_matrix_status()) {
772 : Isibaar 1.2 bs_put_matrix(bs, get_intra_matrix());
773 : Isibaar 1.1 }
774 :    
775 : edgomez 1.14 BitstreamPutBit(bs, get_inter_matrix_status()); // load_inter_quant_mat
776 :     if (get_inter_matrix_status()) {
777 : Isibaar 1.2 bs_put_matrix(bs, get_inter_matrix());
778 : Isibaar 1.1 }
779 :    
780 :     }
781 :    
782 :     BitstreamPutBit(bs, 1); // complexity_estimation_disable
783 :     BitstreamPutBit(bs, 1); // resync_marker_disable
784 :     BitstreamPutBit(bs, 0); // data_partitioned
785 :     BitstreamPutBit(bs, 0); // scalability
786 :     }
787 :    
788 :    
789 :     /*
790 :     write vop header
791 :    
792 :     NOTE: doesnt handle bother with time_base & time_inc
793 :     time_base = n seconds since last resync (eg. last iframe)
794 :     time_inc = nth of a second since last resync
795 :     (decoder uses these values to determine precise time since last resync)
796 :     */
797 : edgomez 1.14 void
798 :     BitstreamWriteVopHeader(Bitstream * const bs,
799 :     const MBParam * pParam,
800 : suxen_drol 1.17 const FRAMEINFO * frame,
801 :     int vop_coded)
802 : Isibaar 1.1 {
803 : suxen_drol 1.8 uint32_t i;
804 : chl 1.28
805 : edgomez 1.14 BitstreamPad(bs);
806 :     BitstreamPutBits(bs, VOP_START_CODE, 32);
807 :    
808 :     BitstreamPutBits(bs, frame->coding_type, 2);
809 : Isibaar 1.1
810 :     // time_base = 0 write n x PutBit(1), PutBit(0)
811 : suxen_drol 1.8 #ifdef BFRAMES
812 : edgomez 1.14 for (i = 0; i < frame->seconds; i++) {
813 : suxen_drol 1.8 BitstreamPutBit(bs, 1);
814 :     }
815 :     BitstreamPutBit(bs, 0);
816 :     #else
817 : chl 1.28 for (i = 0; i < frame->seconds; i++) {
818 :     BitstreamPutBit(bs, 1);
819 :     }
820 :     BitstreamPutBit(bs, 0);
821 :     // BitstreamPutBits(bs, 0, 1);
822 : suxen_drol 1.8 #endif
823 : Isibaar 1.1
824 :     WRITE_MARKER();
825 :    
826 :     // time_increment: value=nth_of_sec, nbits = log2(resolution)
827 : suxen_drol 1.8 #ifdef BFRAMES
828 : edgomez 1.14 BitstreamPutBits(bs, frame->ticks, log2bin(pParam->fbase));
829 : suxen_drol 1.22 /*DPRINTF("[%i:%i] %c\n", frame->seconds, frame->ticks,
830 : edgomez 1.14 frame->coding_type == I_VOP ? 'I' : frame->coding_type ==
831 : suxen_drol 1.22 P_VOP ? 'P' : 'B');*/
832 : suxen_drol 1.8 #else
833 : chl 1.28 BitstreamPutBits(bs, frame->ticks, log2bin(pParam->fbase));
834 :     // BitstreamPutBits(bs, 1, 1);
835 : suxen_drol 1.8 #endif
836 : Isibaar 1.1
837 :     WRITE_MARKER();
838 :    
839 : suxen_drol 1.17 if (!vop_coded) {
840 :     BitstreamPutBits(bs, 0, 1);
841 :     return;
842 :     }
843 :    
844 : edgomez 1.14 BitstreamPutBits(bs, 1, 1); // vop_coded
845 : Isibaar 1.1
846 : suxen_drol 1.11 if (frame->coding_type == P_VOP)
847 : suxen_drol 1.7 BitstreamPutBits(bs, frame->rounding_type, 1);
848 : Isibaar 1.1
849 : edgomez 1.14 BitstreamPutBits(bs, 0, 3); // intra_dc_vlc_threshold
850 :    
851 :     if (frame->global_flags & XVID_INTERLACING) {
852 :     BitstreamPutBit(bs, 1); // top field first
853 :     BitstreamPutBit(bs, 0); // alternate vertical scan
854 : h 1.4 }
855 :    
856 : edgomez 1.14 BitstreamPutBits(bs, frame->quant, 5); // quantizer
857 :    
858 : suxen_drol 1.7 if (frame->coding_type != I_VOP)
859 : edgomez 1.14 BitstreamPutBits(bs, frame->fcode, 3); // forward_fixed_code
860 : suxen_drol 1.8
861 :     if (frame->coding_type == B_VOP)
862 : edgomez 1.14 BitstreamPutBits(bs, frame->bcode, 3); // backward_fixed_code
863 : suxen_drol 1.8
864 : Isibaar 1.1 }
865 : suxen_drol 1.17
866 :    
867 :     void
868 :     BitstreamWriteUserData(Bitstream * const bs,
869 :     uint8_t * data,
870 :     const int length)
871 :     {
872 :     int i;
873 :    
874 :     BitstreamPad(bs);
875 :     BitstreamPutBits(bs, USERDATA_START_CODE, 32);
876 :    
877 :     for (i = 0; i < length; i++) {
878 :     BitstreamPutBits(bs, data[i], 8);
879 :     }
880 :    
881 : chl 1.24 }

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