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Revision 1.14 - (view) (download)
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 : | * * | ||
42 : | * Revision history: * | ||
43 : | chenm001 | 1.6 | * * |
44 : | chenm001 | 1.13 | * 08.05.2002 add low_delay support for B_VOP decode * |
45 : | * MinChen <chenm001@163.com> * | ||
46 : | suxen_drol | 1.12 | * 06.05.2002 low_delay * |
47 : | suxen_drol | 1.11 | * 06.05.2002 fixed fincr/fbase error * |
48 : | * 01.05.2002 added BVOP support to BitstreamWriteVopHeader * | ||
49 : | chenm001 | 1.6 | * 15.04.2002 rewrite log2bin use asm386 By MinChen <chenm001@163.com> * |
50 : | * 26.03.2002 interlacing support * | ||
51 : | Isibaar | 1.1 | * 03.03.2002 qmatrix writing * |
52 : | * 03.03.2002 merged BITREADER and BITWRITER * | ||
53 : | * 30.02.2002 intra_dc_threshold support * | ||
54 : | * 04.12.2001 support for additional headers * | ||
55 : | * 16.12.2001 inital version * | ||
56 : | * * | ||
57 : | ******************************************************************************/ | ||
58 : | |||
59 : | |||
60 : | #include "bitstream.h" | ||
61 : | #include "zigzag.h" | ||
62 : | Isibaar | 1.2 | #include "../quant/quant_matrix.h" |
63 : | Isibaar | 1.1 | |
64 : | chenm001 | 1.6 | |
65 : | edgomez | 1.14 | static uint32_t __inline |
66 : | log2bin(uint32_t value) | ||
67 : | Isibaar | 1.1 | { |
68 : | chenm001 | 1.6 | /* Changed by Chenm001 */ |
69 : | #ifndef WIN32 | ||
70 : | Isibaar | 1.1 | int n = 0; |
71 : | edgomez | 1.14 | |
72 : | while (value) { | ||
73 : | Isibaar | 1.1 | value >>= 1; |
74 : | n++; | ||
75 : | } | ||
76 : | return n; | ||
77 : | chenm001 | 1.6 | #else |
78 : | edgomez | 1.14 | __asm { |
79 : | bsr eax, value inc eax} | ||
80 : | chenm001 | 1.6 | #endif |
81 : | Isibaar | 1.1 | } |
82 : | |||
83 : | |||
84 : | edgomez | 1.14 | static const uint32_t intra_dc_threshold_table[] = { |
85 : | 32, /* never use */ | ||
86 : | Isibaar | 1.1 | 13, |
87 : | 15, | ||
88 : | 17, | ||
89 : | 19, | ||
90 : | 21, | ||
91 : | 23, | ||
92 : | 1, | ||
93 : | }; | ||
94 : | |||
95 : | |||
96 : | edgomez | 1.14 | void |
97 : | bs_get_matrix(Bitstream * bs, | ||
98 : | uint8_t * matrix) | ||
99 : | { | ||
100 : | int i = 0; | ||
101 : | int last, value = 0; | ||
102 : | |||
103 : | do { | ||
104 : | last = value; | ||
105 : | value = BitstreamGetBits(bs, 8); | ||
106 : | matrix[scan_tables[0][i++]] = value; | ||
107 : | } | ||
108 : | while (value != 0 && i < 64); | ||
109 : | |||
110 : | while (i < 64) { | ||
111 : | matrix[scan_tables[0][i++]] = last; | ||
112 : | } | ||
113 : | } | ||
114 : | Isibaar | 1.2 | |
115 : | Isibaar | 1.1 | /* |
116 : | decode headers | ||
117 : | returns coding_type, or -1 if error | ||
118 : | */ | ||
119 : | |||
120 : | edgomez | 1.14 | int |
121 : | BitstreamReadHeaders(Bitstream * bs, | ||
122 : | DECODER * dec, | ||
123 : | uint32_t * rounding, | ||
124 : | uint32_t * quant, | ||
125 : | uint32_t * fcode_forward, | ||
126 : | uint32_t * fcode_backward, | ||
127 : | uint32_t * intra_dc_threshold) | ||
128 : | Isibaar | 1.1 | { |
129 : | uint32_t vol_ver_id; | ||
130 : | chenm001 | 1.9 | static uint32_t time_increment_resolution; |
131 : | Isibaar | 1.1 | uint32_t coding_type; |
132 : | uint32_t start_code; | ||
133 : | edgomez | 1.14 | uint32_t time_incr = 0; |
134 : | int32_t time_increment; | ||
135 : | chenm001 | 1.9 | |
136 : | edgomez | 1.14 | do { |
137 : | Isibaar | 1.1 | BitstreamByteAlign(bs); |
138 : | start_code = BitstreamShowBits(bs, 32); | ||
139 : | |||
140 : | edgomez | 1.14 | if (start_code == VISOBJSEQ_START_CODE) { |
141 : | Isibaar | 1.1 | // DEBUG("visual_object_sequence"); |
142 : | edgomez | 1.14 | BitstreamSkip(bs, 32); // visual_object_sequence_start_code |
143 : | BitstreamSkip(bs, 8); // profile_and_level_indication | ||
144 : | } else if (start_code == VISOBJSEQ_STOP_CODE) { | ||
145 : | BitstreamSkip(bs, 32); // visual_object_sequence_stop_code | ||
146 : | } else if (start_code == VISOBJ_START_CODE) { | ||
147 : | Isibaar | 1.1 | // DEBUG("visual_object"); |
148 : | edgomez | 1.14 | BitstreamSkip(bs, 32); // visual_object_start_code |
149 : | if (BitstreamGetBit(bs)) // is_visual_object_identified | ||
150 : | Isibaar | 1.1 | { |
151 : | edgomez | 1.14 | vol_ver_id = BitstreamGetBits(bs, 4); // visual_object_ver_id |
152 : | BitstreamSkip(bs, 3); // visual_object_priority | ||
153 : | } else { | ||
154 : | Isibaar | 1.1 | vol_ver_id = 1; |
155 : | } | ||
156 : | |||
157 : | if (BitstreamShowBits(bs, 4) != VISOBJ_TYPE_VIDEO) // visual_object_type | ||
158 : | { | ||
159 : | DEBUG("visual_object_type != video"); | ||
160 : | return -1; | ||
161 : | } | ||
162 : | BitstreamSkip(bs, 4); | ||
163 : | |||
164 : | // video_signal_type | ||
165 : | |||
166 : | edgomez | 1.14 | if (BitstreamGetBit(bs)) // video_signal_type |
167 : | Isibaar | 1.1 | { |
168 : | DEBUG("+ video_signal_type"); | ||
169 : | edgomez | 1.14 | BitstreamSkip(bs, 3); // video_format |
170 : | BitstreamSkip(bs, 1); // video_range | ||
171 : | if (BitstreamGetBit(bs)) // color_description | ||
172 : | Isibaar | 1.1 | { |
173 : | DEBUG("+ color_description"); | ||
174 : | edgomez | 1.14 | BitstreamSkip(bs, 8); // color_primaries |
175 : | BitstreamSkip(bs, 8); // transfer_characteristics | ||
176 : | BitstreamSkip(bs, 8); // matrix_coefficients | ||
177 : | Isibaar | 1.1 | } |
178 : | } | ||
179 : | edgomez | 1.14 | } else if ((start_code & ~0x1f) == VIDOBJ_START_CODE) { |
180 : | BitstreamSkip(bs, 32); // video_object_start_code | ||
181 : | } else if ((start_code & ~0xf) == VIDOBJLAY_START_CODE) { | ||
182 : | Isibaar | 1.1 | // DEBUG("video_object_layer"); |
183 : | edgomez | 1.14 | BitstreamSkip(bs, 32); // video_object_layer_start_code |
184 : | Isibaar | 1.1 | |
185 : | edgomez | 1.14 | BitstreamSkip(bs, 1); // random_accessible_vol |
186 : | Isibaar | 1.1 | |
187 : | // video_object_type_indication | ||
188 : | 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 |
189 : | Isibaar | 1.1 | { |
190 : | edgomez | 1.14 | DEBUG1("video_object_type_indication not supported", |
191 : | BitstreamShowBits(bs, 8)); | ||
192 : | Isibaar | 1.1 | return -1; |
193 : | } | ||
194 : | BitstreamSkip(bs, 8); | ||
195 : | |||
196 : | |||
197 : | edgomez | 1.14 | if (BitstreamGetBit(bs)) // is_object_layer_identifier |
198 : | Isibaar | 1.1 | { |
199 : | DEBUG("+ is_object_layer_identifier"); | ||
200 : | edgomez | 1.14 | vol_ver_id = BitstreamGetBits(bs, 4); // video_object_layer_verid |
201 : | BitstreamSkip(bs, 3); // video_object_layer_priority | ||
202 : | } else { | ||
203 : | Isibaar | 1.1 | vol_ver_id = 1; |
204 : | } | ||
205 : | //DEBUGI("vol_ver_id", vol_ver_id); | ||
206 : | |||
207 : | if (BitstreamGetBits(bs, 4) == VIDOBJLAY_AR_EXTPAR) // aspect_ratio_info | ||
208 : | { | ||
209 : | DEBUG("+ aspect_ratio_info"); | ||
210 : | edgomez | 1.14 | BitstreamSkip(bs, 8); // par_width |
211 : | BitstreamSkip(bs, 8); // par_height | ||
212 : | Isibaar | 1.1 | } |
213 : | |||
214 : | edgomez | 1.14 | if (BitstreamGetBit(bs)) // vol_control_parameters |
215 : | Isibaar | 1.1 | { |
216 : | DEBUG("+ vol_control_parameters"); | ||
217 : | edgomez | 1.14 | BitstreamSkip(bs, 2); // chroma_format |
218 : | dec->low_delay = BitstreamGetBit(bs); // low_delay | ||
219 : | if (BitstreamGetBit(bs)) // vbv_parameters | ||
220 : | Isibaar | 1.1 | { |
221 : | DEBUG("+ vbv_parameters"); | ||
222 : | edgomez | 1.14 | BitstreamSkip(bs, 15); // first_half_bitrate |
223 : | Isibaar | 1.1 | READ_MARKER(); |
224 : | edgomez | 1.14 | BitstreamSkip(bs, 15); // latter_half_bitrate |
225 : | Isibaar | 1.1 | READ_MARKER(); |
226 : | edgomez | 1.14 | BitstreamSkip(bs, 15); // first_half_vbv_buffer_size |
227 : | Isibaar | 1.1 | READ_MARKER(); |
228 : | edgomez | 1.14 | BitstreamSkip(bs, 3); // latter_half_vbv_buffer_size |
229 : | BitstreamSkip(bs, 11); // first_half_vbv_occupancy | ||
230 : | Isibaar | 1.1 | READ_MARKER(); |
231 : | edgomez | 1.14 | BitstreamSkip(bs, 15); // latter_half_vbv_occupancy |
232 : | Isibaar | 1.1 | READ_MARKER(); |
233 : | edgomez | 1.14 | |
234 : | Isibaar | 1.1 | } |
235 : | } | ||
236 : | |||
237 : | dec->shape = BitstreamGetBits(bs, 2); // video_object_layer_shape | ||
238 : | // DEBUG1("shape", dec->shape); | ||
239 : | edgomez | 1.14 | |
240 : | if (dec->shape == VIDOBJLAY_SHAPE_GRAYSCALE && vol_ver_id != 1) { | ||
241 : | BitstreamSkip(bs, 4); // video_object_layer_shape_extension | ||
242 : | Isibaar | 1.1 | } |
243 : | |||
244 : | READ_MARKER(); | ||
245 : | |||
246 : | chenm001 | 1.9 | // *************************** for decode B-frame time *********************** |
247 : | time_increment_resolution = BitstreamGetBits(bs, 16); // vop_time_increment_resolution | ||
248 : | time_increment_resolution--; | ||
249 : | //DEBUG1("time_increment_resolution=",time_increment_resolution); | ||
250 : | edgomez | 1.14 | if (time_increment_resolution > 0) { |
251 : | chenm001 | 1.9 | dec->time_inc_bits = log2bin(time_increment_resolution); |
252 : | edgomez | 1.14 | } else { |
253 : | Isibaar | 1.1 | // dec->time_inc_bits = 0; |
254 : | |||
255 : | // for "old" xvid compatibility, set time_inc_bits = 1 | ||
256 : | dec->time_inc_bits = 1; | ||
257 : | } | ||
258 : | |||
259 : | READ_MARKER(); | ||
260 : | |||
261 : | edgomez | 1.14 | if (BitstreamGetBit(bs)) // fixed_vop_rate |
262 : | Isibaar | 1.1 | { |
263 : | BitstreamSkip(bs, dec->time_inc_bits); // fixed_vop_time_increment | ||
264 : | } | ||
265 : | |||
266 : | edgomez | 1.14 | if (dec->shape != VIDOBJLAY_SHAPE_BINARY_ONLY) { |
267 : | Isibaar | 1.1 | |
268 : | edgomez | 1.14 | if (dec->shape == VIDOBJLAY_SHAPE_RECTANGULAR) { |
269 : | Isibaar | 1.1 | uint32_t width, height; |
270 : | |||
271 : | READ_MARKER(); | ||
272 : | edgomez | 1.14 | width = BitstreamGetBits(bs, 13); // video_object_layer_width |
273 : | Isibaar | 1.1 | //DEBUGI("width", width); |
274 : | READ_MARKER(); | ||
275 : | edgomez | 1.14 | height = BitstreamGetBits(bs, 13); // video_object_layer_height |
276 : | //DEBUGI("height", height); | ||
277 : | Isibaar | 1.1 | READ_MARKER(); |
278 : | |||
279 : | edgomez | 1.14 | if (width != dec->width || height != dec->height) { |
280 : | Isibaar | 1.1 | DEBUG("FATAL: video dimension discrepancy ***"); |
281 : | DEBUG2("bitstream width/height", width, height); | ||
282 : | DEBUG2("param width/height", dec->width, dec->height); | ||
283 : | return -1; | ||
284 : | } | ||
285 : | |||
286 : | } | ||
287 : | h | 1.4 | |
288 : | edgomez | 1.14 | if ((dec->interlacing = BitstreamGetBit(bs))) { |
289 : | h | 1.4 | DEBUG("vol: interlacing"); |
290 : | Isibaar | 1.1 | } |
291 : | |||
292 : | edgomez | 1.14 | if (!BitstreamGetBit(bs)) // obmc_disable |
293 : | Isibaar | 1.1 | { |
294 : | DEBUG("IGNORED/TODO: !obmc_disable"); | ||
295 : | // TODO | ||
296 : | // fucking divx4.02 has this enabled | ||
297 : | } | ||
298 : | |||
299 : | edgomez | 1.14 | if (BitstreamGetBits(bs, (vol_ver_id == 1 ? 1 : 2))) // sprite_enable |
300 : | Isibaar | 1.1 | { |
301 : | DEBUG("sprite_enable; not supported"); | ||
302 : | return -1; | ||
303 : | } | ||
304 : | edgomez | 1.14 | |
305 : | if (vol_ver_id != 1 && | ||
306 : | dec->shape != VIDOBJLAY_SHAPE_RECTANGULAR) { | ||
307 : | BitstreamSkip(bs, 1); // sadct_disable | ||
308 : | Isibaar | 1.1 | } |
309 : | |||
310 : | edgomez | 1.14 | if (BitstreamGetBit(bs)) // not_8_bit |
311 : | Isibaar | 1.1 | { |
312 : | DEBUG("+ not_8_bit [IGNORED/TODO]"); | ||
313 : | dec->quant_bits = BitstreamGetBits(bs, 4); // quant_precision | ||
314 : | edgomez | 1.14 | BitstreamSkip(bs, 4); // bits_per_pixel |
315 : | } else { | ||
316 : | Isibaar | 1.1 | dec->quant_bits = 5; |
317 : | } | ||
318 : | |||
319 : | edgomez | 1.14 | if (dec->shape == VIDOBJLAY_SHAPE_GRAYSCALE) { |
320 : | BitstreamSkip(bs, 1); // no_gray_quant_update | ||
321 : | BitstreamSkip(bs, 1); // composition_method | ||
322 : | BitstreamSkip(bs, 1); // linear_composition | ||
323 : | Isibaar | 1.1 | } |
324 : | |||
325 : | edgomez | 1.14 | dec->quant_type = BitstreamGetBit(bs); // quant_type |
326 : | Isibaar | 1.1 | // DEBUG1("**** quant_type", dec->quant_type); |
327 : | |||
328 : | edgomez | 1.14 | if (dec->quant_type) { |
329 : | if (BitstreamGetBit(bs)) // load_intra_quant_mat | ||
330 : | Isibaar | 1.1 | { |
331 : | Isibaar | 1.3 | uint8_t matrix[64]; |
332 : | edgomez | 1.14 | |
333 : | Isibaar | 1.2 | bs_get_matrix(bs, matrix); |
334 : | set_intra_matrix(matrix); | ||
335 : | edgomez | 1.14 | } else |
336 : | Isibaar | 1.3 | set_intra_matrix(get_default_intra_matrix()); |
337 : | Isibaar | 1.2 | |
338 : | edgomez | 1.14 | if (BitstreamGetBit(bs)) // load_inter_quant_mat |
339 : | Isibaar | 1.1 | { |
340 : | edgomez | 1.14 | uint8_t matrix[64]; |
341 : | |||
342 : | Isibaar | 1.2 | bs_get_matrix(bs, matrix); |
343 : | set_inter_matrix(matrix); | ||
344 : | edgomez | 1.14 | } else |
345 : | Isibaar | 1.3 | set_inter_matrix(get_default_inter_matrix()); |
346 : | Isibaar | 1.1 | |
347 : | edgomez | 1.14 | if (dec->shape == VIDOBJLAY_SHAPE_GRAYSCALE) { |
348 : | Isibaar | 1.1 | // TODO |
349 : | DEBUG("TODO: grayscale matrix stuff"); | ||
350 : | return -1; | ||
351 : | } | ||
352 : | Isibaar | 1.2 | |
353 : | Isibaar | 1.1 | } |
354 : | |||
355 : | edgomez | 1.14 | |
356 : | if (vol_ver_id != 1) { | ||
357 : | Isibaar | 1.1 | dec->quarterpel = BitstreamGetBit(bs); // quarter_sampe |
358 : | edgomez | 1.14 | if (dec->quarterpel) { |
359 : | Isibaar | 1.1 | DEBUG("IGNORED/TODO: quarter_sample"); |
360 : | } | ||
361 : | edgomez | 1.14 | } else { |
362 : | Isibaar | 1.1 | dec->quarterpel = 0; |
363 : | } | ||
364 : | |||
365 : | edgomez | 1.14 | if (!BitstreamGetBit(bs)) // complexity_estimation_disable |
366 : | Isibaar | 1.1 | { |
367 : | DEBUG("TODO: complexity_estimation header"); | ||
368 : | // TODO | ||
369 : | return -1; | ||
370 : | } | ||
371 : | |||
372 : | edgomez | 1.14 | if (!BitstreamGetBit(bs)) // resync_marker_disable |
373 : | Isibaar | 1.1 | { |
374 : | DEBUG("IGNORED/TODO: !resync_marker_disable"); | ||
375 : | // TODO | ||
376 : | } | ||
377 : | |||
378 : | edgomez | 1.14 | if (BitstreamGetBit(bs)) // data_partitioned |
379 : | Isibaar | 1.1 | { |
380 : | DEBUG("+ data_partitioned"); | ||
381 : | edgomez | 1.14 | BitstreamSkip(bs, 1); // reversible_vlc |
382 : | Isibaar | 1.1 | } |
383 : | |||
384 : | edgomez | 1.14 | if (vol_ver_id != 1) { |
385 : | if (BitstreamGetBit(bs)) // newpred_enable | ||
386 : | Isibaar | 1.1 | { |
387 : | DEBUG("+ newpred_enable"); | ||
388 : | edgomez | 1.14 | BitstreamSkip(bs, 2); // requested_upstream_message_type |
389 : | BitstreamSkip(bs, 1); // newpred_segment_type | ||
390 : | Isibaar | 1.1 | } |
391 : | edgomez | 1.14 | if (BitstreamGetBit(bs)) // reduced_resolution_vop_enable |
392 : | Isibaar | 1.1 | { |
393 : | DEBUG("TODO: reduced_resolution_vop_enable"); | ||
394 : | // TODO | ||
395 : | return -1; | ||
396 : | } | ||
397 : | } | ||
398 : | edgomez | 1.14 | |
399 : | if ((dec->scalability = BitstreamGetBit(bs))) // scalability | ||
400 : | Isibaar | 1.1 | { |
401 : | // TODO | ||
402 : | DEBUG("TODO: scalability"); | ||
403 : | return -1; | ||
404 : | } | ||
405 : | edgomez | 1.14 | } else // dec->shape == BINARY_ONLY |
406 : | Isibaar | 1.1 | { |
407 : | edgomez | 1.14 | if (vol_ver_id != 1) { |
408 : | Isibaar | 1.1 | if (BitstreamGetBit(bs)) // scalability |
409 : | { | ||
410 : | // TODO | ||
411 : | DEBUG("TODO: scalability"); | ||
412 : | return -1; | ||
413 : | } | ||
414 : | } | ||
415 : | edgomez | 1.14 | BitstreamSkip(bs, 1); // resync_marker_disable |
416 : | Isibaar | 1.1 | |
417 : | } | ||
418 : | |||
419 : | edgomez | 1.14 | } else if (start_code == GRPOFVOP_START_CODE) { |
420 : | Isibaar | 1.1 | // DEBUG("group_of_vop"); |
421 : | BitstreamSkip(bs, 32); | ||
422 : | { | ||
423 : | int hours, minutes, seconds; | ||
424 : | edgomez | 1.14 | |
425 : | Isibaar | 1.1 | hours = BitstreamGetBits(bs, 5); |
426 : | minutes = BitstreamGetBits(bs, 6); | ||
427 : | READ_MARKER(); | ||
428 : | seconds = BitstreamGetBits(bs, 6); | ||
429 : | // DEBUG3("hms", hours, minutes, seconds); | ||
430 : | } | ||
431 : | edgomez | 1.14 | BitstreamSkip(bs, 1); // closed_gov |
432 : | BitstreamSkip(bs, 1); // broken_link | ||
433 : | } else if (start_code == VOP_START_CODE) { | ||
434 : | Isibaar | 1.1 | // DEBUG("vop_start_code"); |
435 : | edgomez | 1.14 | BitstreamSkip(bs, 32); // vop_start_code |
436 : | Isibaar | 1.1 | |
437 : | edgomez | 1.14 | coding_type = BitstreamGetBits(bs, 2); // vop_coding_type |
438 : | Isibaar | 1.1 | //DEBUG1("coding_type", coding_type); |
439 : | |||
440 : | chenm001 | 1.9 | // *************************** for decode B-frame time *********************** |
441 : | edgomez | 1.14 | while (BitstreamGetBit(bs) != 0) // time_base |
442 : | chenm001 | 1.9 | time_incr++; |
443 : | edgomez | 1.14 | |
444 : | Isibaar | 1.1 | READ_MARKER(); |
445 : | edgomez | 1.14 | |
446 : | Isibaar | 1.1 | //DEBUG1("time_inc_bits", dec->time_inc_bits); |
447 : | //DEBUG1("vop_time_incr", BitstreamShowBits(bs, dec->time_inc_bits)); | ||
448 : | edgomez | 1.14 | if (dec->time_inc_bits) { |
449 : | //BitstreamSkip(bs, dec->time_inc_bits); // vop_time_increment | ||
450 : | chenm001 | 1.9 | time_increment = (BitstreamGetBits(bs, dec->time_inc_bits)); // vop_time_increment |
451 : | } | ||
452 : | edgomez | 1.14 | if (coding_type != B_VOP) { |
453 : | dec->last_time_base = dec->time_base; | ||
454 : | chenm001 | 1.9 | dec->time_base += time_incr; |
455 : | edgomez | 1.14 | dec->time = |
456 : | dec->time_base * time_increment_resolution + | ||
457 : | time_increment; | ||
458 : | dec->time_pp = (uint32_t) (dec->time - dec->last_non_b_time); | ||
459 : | dec->last_non_b_time = dec->time; | ||
460 : | } else { | ||
461 : | dec->time = | ||
462 : | (dec->last_time_base + | ||
463 : | time_incr) * time_increment_resolution + time_increment; | ||
464 : | dec->time_bp = (uint32_t) (dec->last_non_b_time - dec->time); | ||
465 : | Isibaar | 1.1 | } |
466 : | chenm001 | 1.9 | //DEBUG1("time_increment=",time_increment); |
467 : | Isibaar | 1.1 | |
468 : | READ_MARKER(); | ||
469 : | |||
470 : | edgomez | 1.14 | if (!BitstreamGetBit(bs)) // vop_coded |
471 : | Isibaar | 1.1 | { |
472 : | return N_VOP; | ||
473 : | } | ||
474 : | |||
475 : | /* if (newpred_enable) | ||
476 : | edgomez | 1.14 | { |
477 : | } | ||
478 : | */ | ||
479 : | Isibaar | 1.1 | |
480 : | chenm001 | 1.9 | // fix a little bug by MinChen <chenm002@163.com> |
481 : | edgomez | 1.14 | if ((dec->shape != VIDOBJLAY_SHAPE_BINARY_ONLY) && |
482 : | (coding_type == P_VOP)) { | ||
483 : | Isibaar | 1.1 | *rounding = BitstreamGetBit(bs); // rounding_type |
484 : | //DEBUG1("rounding", *rounding); | ||
485 : | } | ||
486 : | |||
487 : | /* if (reduced_resolution_enable) | ||
488 : | edgomez | 1.14 | { |
489 : | } | ||
490 : | */ | ||
491 : | Isibaar | 1.1 | |
492 : | edgomez | 1.14 | if (dec->shape != VIDOBJLAY_SHAPE_RECTANGULAR) { |
493 : | Isibaar | 1.1 | uint32_t width, height; |
494 : | uint32_t horiz_mc_ref, vert_mc_ref; | ||
495 : | edgomez | 1.14 | |
496 : | Isibaar | 1.1 | width = BitstreamGetBits(bs, 13); |
497 : | READ_MARKER(); | ||
498 : | height = BitstreamGetBits(bs, 13); | ||
499 : | READ_MARKER(); | ||
500 : | horiz_mc_ref = BitstreamGetBits(bs, 13); | ||
501 : | READ_MARKER(); | ||
502 : | vert_mc_ref = BitstreamGetBits(bs, 13); | ||
503 : | READ_MARKER(); | ||
504 : | |||
505 : | // DEBUG2("vop_width/height", width, height); | ||
506 : | // DEBUG2("ref ", horiz_mc_ref, vert_mc_ref); | ||
507 : | |||
508 : | edgomez | 1.14 | BitstreamSkip(bs, 1); // change_conv_ratio_disable |
509 : | if (BitstreamGetBit(bs)) // vop_constant_alpha | ||
510 : | Isibaar | 1.1 | { |
511 : | edgomez | 1.14 | BitstreamSkip(bs, 8); // vop_constant_alpha_value |
512 : | Isibaar | 1.1 | } |
513 : | } | ||
514 : | |||
515 : | edgomez | 1.14 | |
516 : | if (dec->shape != VIDOBJLAY_SHAPE_BINARY_ONLY) { | ||
517 : | Isibaar | 1.1 | // intra_dc_vlc_threshold |
518 : | edgomez | 1.14 | *intra_dc_threshold = |
519 : | intra_dc_threshold_table[BitstreamGetBits(bs, 3)]; | ||
520 : | Isibaar | 1.1 | |
521 : | edgomez | 1.14 | if (dec->interlacing) { |
522 : | if ((dec->top_field_first = BitstreamGetBit(bs))) { | ||
523 : | h | 1.4 | DEBUG("vop: top_field_first"); |
524 : | } | ||
525 : | edgomez | 1.14 | if ((dec->alternate_vertical_scan = BitstreamGetBit(bs))) { |
526 : | h | 1.4 | DEBUG("vop: alternate_vertical_scan"); |
527 : | } | ||
528 : | } | ||
529 : | Isibaar | 1.1 | } |
530 : | edgomez | 1.14 | |
531 : | if ((*quant = BitstreamGetBits(bs, dec->quant_bits)) < 1) // vop_quant | ||
532 : | Isibaar | 1.10 | *quant = 1; |
533 : | |||
534 : | Isibaar | 1.1 | //DEBUG1("quant", *quant); |
535 : | edgomez | 1.14 | |
536 : | if (coding_type != I_VOP) { | ||
537 : | *fcode_forward = BitstreamGetBits(bs, 3); // fcode_forward | ||
538 : | Isibaar | 1.1 | } |
539 : | edgomez | 1.14 | |
540 : | if (coding_type == B_VOP) { | ||
541 : | *fcode_backward = BitstreamGetBits(bs, 3); // fcode_backward | ||
542 : | chenm001 | 1.9 | } |
543 : | edgomez | 1.14 | if (!dec->scalability) { |
544 : | if ((dec->shape != VIDOBJLAY_SHAPE_RECTANGULAR) && | ||
545 : | (coding_type != I_VOP)) { | ||
546 : | BitstreamSkip(bs, 1); // vop_shape_coding_type | ||
547 : | chenm001 | 1.9 | } |
548 : | Isibaar | 1.1 | } |
549 : | return coding_type; | ||
550 : | edgomez | 1.14 | } else if (start_code == USERDATA_START_CODE) { |
551 : | Isibaar | 1.1 | // DEBUG("user_data"); |
552 : | edgomez | 1.14 | BitstreamSkip(bs, 32); // user_data_start_code |
553 : | } else // start_code == ? | ||
554 : | Isibaar | 1.1 | { |
555 : | edgomez | 1.14 | if (BitstreamShowBits(bs, 24) == 0x000001) { |
556 : | DEBUG1("*** WARNING: unknown start_code", | ||
557 : | BitstreamShowBits(bs, 32)); | ||
558 : | Isibaar | 1.1 | } |
559 : | BitstreamSkip(bs, 8); | ||
560 : | } | ||
561 : | } | ||
562 : | while ((BitstreamPos(bs) >> 3) < bs->length); | ||
563 : | |||
564 : | DEBUG("*** WARNING: no vop_start_code found"); | ||
565 : | edgomez | 1.14 | return -1; /* ignore it */ |
566 : | Isibaar | 1.1 | } |
567 : | |||
568 : | |||
569 : | /* write custom quant matrix */ | ||
570 : | |||
571 : | edgomez | 1.14 | static void |
572 : | bs_put_matrix(Bitstream * bs, | ||
573 : | const int16_t * matrix) | ||
574 : | Isibaar | 1.1 | { |
575 : | int i, j; | ||
576 : | const int last = matrix[scan_tables[0][63]]; | ||
577 : | |||
578 : | edgomez | 1.14 | for (j = 63; j >= 0 && matrix[scan_tables[0][j - 1]] == last; j--); |
579 : | Isibaar | 1.1 | |
580 : | edgomez | 1.14 | for (i = 0; i <= j; i++) { |
581 : | Isibaar | 1.1 | BitstreamPutBits(bs, matrix[scan_tables[0][i]], 8); |
582 : | } | ||
583 : | |||
584 : | edgomez | 1.14 | if (j < 63) { |
585 : | Isibaar | 1.1 | BitstreamPutBits(bs, 0, 8); |
586 : | } | ||
587 : | } | ||
588 : | |||
589 : | |||
590 : | /* | ||
591 : | write vol header | ||
592 : | */ | ||
593 : | edgomez | 1.14 | void |
594 : | BitstreamWriteVolHeader(Bitstream * const bs, | ||
595 : | const MBParam * pParam, | ||
596 : | const FRAMEINFO * frame) | ||
597 : | Isibaar | 1.1 | { |
598 : | // video object_start_code & vo_id | ||
599 : | edgomez | 1.14 | BitstreamPad(bs); |
600 : | Isibaar | 1.1 | BitstreamPutBits(bs, VO_START_CODE, 27); |
601 : | edgomez | 1.14 | BitstreamPutBits(bs, 0, 5); |
602 : | Isibaar | 1.1 | |
603 : | // video_object_layer_start_code & vol_id | ||
604 : | BitstreamPutBits(bs, VOL_START_CODE, 28); | ||
605 : | BitstreamPutBits(bs, 0, 4); | ||
606 : | |||
607 : | edgomez | 1.14 | BitstreamPutBit(bs, 0); // random_accessible_vol |
608 : | BitstreamPutBits(bs, 0, 8); // video_object_type_indication | ||
609 : | BitstreamPutBit(bs, 0); // is_object_layer_identified (0=not given) | ||
610 : | BitstreamPutBits(bs, 1, 4); // aspect_ratio_info (1=1:1) | ||
611 : | suxen_drol | 1.12 | |
612 : | #ifdef BFRAMES | ||
613 : | edgomez | 1.14 | if (pParam->max_bframes > 0) { |
614 : | suxen_drol | 1.12 | dprintf("low_delay=1"); |
615 : | edgomez | 1.14 | BitstreamPutBit(bs, 1); // vol_control_parameters |
616 : | BitstreamPutBits(bs, 1, 2); // chroma_format 1="4:2:0" | ||
617 : | BitstreamPutBit(bs, 0); // low_delay | ||
618 : | BitstreamPutBit(bs, 0); // vbv_parameters (0=not given) | ||
619 : | } else | ||
620 : | suxen_drol | 1.12 | #endif |
621 : | { | ||
622 : | edgomez | 1.14 | BitstreamPutBits(bs, 0, 1); // vol_control_parameters (0=not given) |
623 : | suxen_drol | 1.12 | } |
624 : | |||
625 : | |||
626 : | edgomez | 1.14 | BitstreamPutBits(bs, 0, 2); // video_object_layer_shape (0=rectangular) |
627 : | Isibaar | 1.1 | |
628 : | WRITE_MARKER(); | ||
629 : | edgomez | 1.14 | |
630 : | Isibaar | 1.1 | /* time_increment_resolution; ignored by current decore versions |
631 : | edgomez | 1.14 | eg. 2fps res=2 inc=1 |
632 : | 25fps res=25 inc=1 | ||
633 : | 29.97fps res=30000 inc=1001 | ||
634 : | */ | ||
635 : | suxen_drol | 1.11 | #ifdef BFRAMES |
636 : | BitstreamPutBits(bs, pParam->fbase, 16); | ||
637 : | #else | ||
638 : | Isibaar | 1.1 | BitstreamPutBits(bs, 2, 16); |
639 : | suxen_drol | 1.11 | #endif |
640 : | Isibaar | 1.1 | |
641 : | WRITE_MARKER(); | ||
642 : | |||
643 : | // fixed_vop_rate | ||
644 : | BitstreamPutBit(bs, 0); | ||
645 : | |||
646 : | // fixed_time_increment: value=nth_of_sec, nbits = log2(resolution) | ||
647 : | // BitstreamPutBits(bs, 0, 15); | ||
648 : | |||
649 : | WRITE_MARKER(); | ||
650 : | edgomez | 1.14 | BitstreamPutBits(bs, pParam->width, 13); // width |
651 : | Isibaar | 1.1 | WRITE_MARKER(); |
652 : | edgomez | 1.14 | BitstreamPutBits(bs, pParam->height, 13); // height |
653 : | Isibaar | 1.1 | WRITE_MARKER(); |
654 : | edgomez | 1.14 | |
655 : | BitstreamPutBit(bs, frame->global_flags & XVID_INTERLACING); // interlace | ||
656 : | Isibaar | 1.1 | BitstreamPutBit(bs, 1); // obmc_disable (overlapped block motion compensation) |
657 : | BitstreamPutBit(bs, 0); // sprite_enable | ||
658 : | BitstreamPutBit(bs, 0); // not_in_bit | ||
659 : | |||
660 : | // quant_type 0=h.263 1=mpeg4(quantizer tables) | ||
661 : | suxen_drol | 1.7 | BitstreamPutBit(bs, pParam->m_quant_type); |
662 : | edgomez | 1.14 | |
663 : | if (pParam->m_quant_type) { | ||
664 : | Isibaar | 1.2 | BitstreamPutBit(bs, get_intra_matrix_status()); // load_intra_quant_mat |
665 : | edgomez | 1.14 | if (get_intra_matrix_status()) { |
666 : | Isibaar | 1.2 | bs_put_matrix(bs, get_intra_matrix()); |
667 : | Isibaar | 1.1 | } |
668 : | |||
669 : | edgomez | 1.14 | BitstreamPutBit(bs, get_inter_matrix_status()); // load_inter_quant_mat |
670 : | if (get_inter_matrix_status()) { | ||
671 : | Isibaar | 1.2 | bs_put_matrix(bs, get_inter_matrix()); |
672 : | Isibaar | 1.1 | } |
673 : | |||
674 : | } | ||
675 : | |||
676 : | BitstreamPutBit(bs, 1); // complexity_estimation_disable | ||
677 : | BitstreamPutBit(bs, 1); // resync_marker_disable | ||
678 : | BitstreamPutBit(bs, 0); // data_partitioned | ||
679 : | BitstreamPutBit(bs, 0); // scalability | ||
680 : | } | ||
681 : | |||
682 : | |||
683 : | /* | ||
684 : | write vop header | ||
685 : | |||
686 : | NOTE: doesnt handle bother with time_base & time_inc | ||
687 : | time_base = n seconds since last resync (eg. last iframe) | ||
688 : | time_inc = nth of a second since last resync | ||
689 : | (decoder uses these values to determine precise time since last resync) | ||
690 : | */ | ||
691 : | edgomez | 1.14 | void |
692 : | BitstreamWriteVopHeader(Bitstream * const bs, | ||
693 : | const MBParam * pParam, | ||
694 : | suxen_drol | 1.7 | const FRAMEINFO * frame) |
695 : | Isibaar | 1.1 | { |
696 : | suxen_drol | 1.8 | #ifdef BFRAMES |
697 : | uint32_t i; | ||
698 : | #endif | ||
699 : | edgomez | 1.14 | BitstreamPad(bs); |
700 : | BitstreamPutBits(bs, VOP_START_CODE, 32); | ||
701 : | |||
702 : | BitstreamPutBits(bs, frame->coding_type, 2); | ||
703 : | Isibaar | 1.1 | |
704 : | // time_base = 0 write n x PutBit(1), PutBit(0) | ||
705 : | suxen_drol | 1.8 | #ifdef BFRAMES |
706 : | edgomez | 1.14 | for (i = 0; i < frame->seconds; i++) { |
707 : | suxen_drol | 1.8 | BitstreamPutBit(bs, 1); |
708 : | } | ||
709 : | BitstreamPutBit(bs, 0); | ||
710 : | #else | ||
711 : | Isibaar | 1.1 | BitstreamPutBits(bs, 0, 1); |
712 : | suxen_drol | 1.8 | #endif |
713 : | Isibaar | 1.1 | |
714 : | WRITE_MARKER(); | ||
715 : | |||
716 : | // time_increment: value=nth_of_sec, nbits = log2(resolution) | ||
717 : | suxen_drol | 1.8 | #ifdef BFRAMES |
718 : | edgomez | 1.14 | BitstreamPutBits(bs, frame->ticks, log2bin(pParam->fbase)); |
719 : | dprintf("[%i:%i] %c\n", frame->seconds, frame->ticks, | ||
720 : | frame->coding_type == I_VOP ? 'I' : frame->coding_type == | ||
721 : | P_VOP ? 'P' : 'B'); | ||
722 : | suxen_drol | 1.8 | #else |
723 : | edgomez | 1.14 | BitstreamPutBits(bs, 1, 1); |
724 : | suxen_drol | 1.8 | #endif |
725 : | Isibaar | 1.1 | |
726 : | WRITE_MARKER(); | ||
727 : | |||
728 : | edgomez | 1.14 | BitstreamPutBits(bs, 1, 1); // vop_coded |
729 : | Isibaar | 1.1 | |
730 : | suxen_drol | 1.11 | if (frame->coding_type == P_VOP) |
731 : | suxen_drol | 1.7 | BitstreamPutBits(bs, frame->rounding_type, 1); |
732 : | Isibaar | 1.1 | |
733 : | edgomez | 1.14 | BitstreamPutBits(bs, 0, 3); // intra_dc_vlc_threshold |
734 : | |||
735 : | if (frame->global_flags & XVID_INTERLACING) { | ||
736 : | BitstreamPutBit(bs, 1); // top field first | ||
737 : | BitstreamPutBit(bs, 0); // alternate vertical scan | ||
738 : | h | 1.4 | } |
739 : | |||
740 : | edgomez | 1.14 | BitstreamPutBits(bs, frame->quant, 5); // quantizer |
741 : | |||
742 : | suxen_drol | 1.7 | if (frame->coding_type != I_VOP) |
743 : | edgomez | 1.14 | BitstreamPutBits(bs, frame->fcode, 3); // forward_fixed_code |
744 : | suxen_drol | 1.8 | |
745 : | if (frame->coding_type == B_VOP) | ||
746 : | edgomez | 1.14 | BitstreamPutBits(bs, frame->bcode, 3); // backward_fixed_code |
747 : | suxen_drol | 1.8 | |
748 : | Isibaar | 1.1 | } |
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