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1 : | Isibaar | 3 | /****************************************************************************** |
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 | 223 | * * |
42 : | Isibaar | 3 | * Revision history: * |
43 : | chenm001 | 223 | * * |
44 : | suxen_drol | 233 | * 22.05.2002 bs_put_matrix fix |
45 : | suxen_drol | 229 | * 20.05.2002 added BitstreamWriteUserData * |
46 : | chenm001 | 223 | * 19.06.2002 Fix a little bug in use custom quant matrix * |
47 : | chenm001 | 168 | * MinChen <chenm001@163.com> * |
48 : | chenm001 | 223 | * 08.05.2002 add low_delay support for B_VOP decode * |
49 : | * MinChen <chenm001@163.com> * | ||
50 : | suxen_drol | 164 | * 06.05.2002 low_delay * |
51 : | suxen_drol | 163 | * 06.05.2002 fixed fincr/fbase error * |
52 : | * 01.05.2002 added BVOP support to BitstreamWriteVopHeader * | ||
53 : | chenm001 | 124 | * 15.04.2002 rewrite log2bin use asm386 By MinChen <chenm001@163.com> * |
54 : | chenm001 | 223 | * 26.03.2002 interlacing support * |
55 : | * 03.03.2002 qmatrix writing * | ||
56 : | * 03.03.2002 merged BITREADER and BITWRITER * | ||
57 : | * 30.02.2002 intra_dc_threshold support * | ||
58 : | * 04.12.2001 support for additional headers * | ||
59 : | * 16.12.2001 inital version * | ||
60 : | * | ||
61 : | Isibaar | 3 | ******************************************************************************/ |
62 : | |||
63 : | |||
64 : | #include "bitstream.h" | ||
65 : | #include "zigzag.h" | ||
66 : | Isibaar | 4 | #include "../quant/quant_matrix.h" |
67 : | Isibaar | 3 | |
68 : | chenm001 | 124 | |
69 : | edgomez | 195 | static uint32_t __inline |
70 : | log2bin(uint32_t value) | ||
71 : | Isibaar | 3 | { |
72 : | chenm001 | 124 | /* Changed by Chenm001 */ |
73 : | #ifndef WIN32 | ||
74 : | Isibaar | 3 | int n = 0; |
75 : | edgomez | 195 | |
76 : | while (value) { | ||
77 : | Isibaar | 3 | value >>= 1; |
78 : | n++; | ||
79 : | } | ||
80 : | return n; | ||
81 : | chenm001 | 124 | #else |
82 : | edgomez | 195 | __asm { |
83 : | suxen_drol | 206 | bsr eax, value |
84 : | inc eax | ||
85 : | } | ||
86 : | chenm001 | 124 | #endif |
87 : | Isibaar | 3 | } |
88 : | |||
89 : | |||
90 : | edgomez | 195 | static const uint32_t intra_dc_threshold_table[] = { |
91 : | 32, /* never use */ | ||
92 : | Isibaar | 3 | 13, |
93 : | 15, | ||
94 : | 17, | ||
95 : | 19, | ||
96 : | 21, | ||
97 : | 23, | ||
98 : | 1, | ||
99 : | }; | ||
100 : | |||
101 : | |||
102 : | edgomez | 195 | void |
103 : | bs_get_matrix(Bitstream * bs, | ||
104 : | uint8_t * matrix) | ||
105 : | { | ||
106 : | int i = 0; | ||
107 : | int last, value = 0; | ||
108 : | Isibaar | 4 | |
109 : | edgomez | 195 | do { |
110 : | last = value; | ||
111 : | value = BitstreamGetBits(bs, 8); | ||
112 : | matrix[scan_tables[0][i++]] = value; | ||
113 : | } | ||
114 : | while (value != 0 && i < 64); | ||
115 : | chenm001 | 223 | i--; // fix little bug at coeff not full |
116 : | edgomez | 195 | |
117 : | while (i < 64) { | ||
118 : | matrix[scan_tables[0][i++]] = last; | ||
119 : | } | ||
120 : | } | ||
121 : | |||
122 : | suxen_drol | 248 | |
123 : | |||
124 : | // for PVOP addbits == fcode - 1 | ||
125 : | // for BVOP addbits == max(fcode,bcode) - 1 | ||
126 : | // returns mbpos | ||
127 : | int | ||
128 : | read_video_packet_header(Bitstream *bs, int addbits) | ||
129 : | { | ||
130 : | int nbits; | ||
131 : | int mbnum; | ||
132 : | int quant; | ||
133 : | int hec; | ||
134 : | |||
135 : | nbits = NUMBITS_VP_RESYNC_MARKER; | ||
136 : | |||
137 : | BitstreamSkip(bs, BitstreamNumBitsToByteAlign(bs)); | ||
138 : | BitstreamSkip(bs, nbits); | ||
139 : | |||
140 : | // if (dec->shape != VIDOBJLAY_SHAPE_RECTANGULAR) { | ||
141 : | // hec | ||
142 : | // vop_width | ||
143 : | // marker_bit | ||
144 : | // vop_height | ||
145 : | // marker_bit | ||
146 : | |||
147 : | //} | ||
148 : | |||
149 : | mbnum = BitstreamGetBits(bs, 9); | ||
150 : | //printf("mbnum %i [%i,%i]\n", mbnum, mbnum % dec->mb_width, mbnum / dec->mb_width); | ||
151 : | |||
152 : | // if (dec->shape != VIDOBJLAY_SHAPE_BINARYONLY) | ||
153 : | quant = BitstreamGetBits(bs, 5); | ||
154 : | |||
155 : | // if (dec->shape != VIDOBJLAY_SHAPE_RECTANGULAR) | ||
156 : | hec = BitstreamGetBit(bs); | ||
157 : | // if (hec) | ||
158 : | // .. decoder hec-header ... | ||
159 : | |||
160 : | return mbnum; | ||
161 : | } | ||
162 : | |||
163 : | |||
164 : | |||
165 : | Isibaar | 3 | /* |
166 : | decode headers | ||
167 : | returns coding_type, or -1 if error | ||
168 : | */ | ||
169 : | |||
170 : | edgomez | 195 | int |
171 : | BitstreamReadHeaders(Bitstream * bs, | ||
172 : | DECODER * dec, | ||
173 : | uint32_t * rounding, | ||
174 : | uint32_t * quant, | ||
175 : | uint32_t * fcode_forward, | ||
176 : | uint32_t * fcode_backward, | ||
177 : | uint32_t * intra_dc_threshold) | ||
178 : | Isibaar | 3 | { |
179 : | uint32_t vol_ver_id; | ||
180 : | chenm001 | 156 | static uint32_t time_increment_resolution; |
181 : | Isibaar | 3 | uint32_t coding_type; |
182 : | uint32_t start_code; | ||
183 : | edgomez | 195 | uint32_t time_incr = 0; |
184 : | int32_t time_increment; | ||
185 : | chenm001 | 156 | |
186 : | edgomez | 195 | do { |
187 : | Isibaar | 3 | BitstreamByteAlign(bs); |
188 : | start_code = BitstreamShowBits(bs, 32); | ||
189 : | |||
190 : | edgomez | 195 | if (start_code == VISOBJSEQ_START_CODE) { |
191 : | suxen_drol | 233 | // DPRINTF("visual_object_sequence"); |
192 : | edgomez | 195 | BitstreamSkip(bs, 32); // visual_object_sequence_start_code |
193 : | BitstreamSkip(bs, 8); // profile_and_level_indication | ||
194 : | } else if (start_code == VISOBJSEQ_STOP_CODE) { | ||
195 : | BitstreamSkip(bs, 32); // visual_object_sequence_stop_code | ||
196 : | } else if (start_code == VISOBJ_START_CODE) { | ||
197 : | suxen_drol | 233 | //DPRINTF("visual_object"); |
198 : | edgomez | 195 | BitstreamSkip(bs, 32); // visual_object_start_code |
199 : | if (BitstreamGetBit(bs)) // is_visual_object_identified | ||
200 : | Isibaar | 3 | { |
201 : | edgomez | 195 | vol_ver_id = BitstreamGetBits(bs, 4); // visual_object_ver_id |
202 : | BitstreamSkip(bs, 3); // visual_object_priority | ||
203 : | } else { | ||
204 : | Isibaar | 3 | vol_ver_id = 1; |
205 : | } | ||
206 : | |||
207 : | if (BitstreamShowBits(bs, 4) != VISOBJ_TYPE_VIDEO) // visual_object_type | ||
208 : | { | ||
209 : | suxen_drol | 233 | //DPRINTF("visual_object_type != video"); |
210 : | Isibaar | 3 | return -1; |
211 : | } | ||
212 : | BitstreamSkip(bs, 4); | ||
213 : | |||
214 : | // video_signal_type | ||
215 : | |||
216 : | edgomez | 195 | if (BitstreamGetBit(bs)) // video_signal_type |
217 : | Isibaar | 3 | { |
218 : | suxen_drol | 233 | //DPRINTF("+ video_signal_type"); |
219 : | edgomez | 195 | BitstreamSkip(bs, 3); // video_format |
220 : | BitstreamSkip(bs, 1); // video_range | ||
221 : | if (BitstreamGetBit(bs)) // color_description | ||
222 : | Isibaar | 3 | { |
223 : | suxen_drol | 233 | //DPRINTF("+ color_description"); |
224 : | edgomez | 195 | BitstreamSkip(bs, 8); // color_primaries |
225 : | BitstreamSkip(bs, 8); // transfer_characteristics | ||
226 : | BitstreamSkip(bs, 8); // matrix_coefficients | ||
227 : | Isibaar | 3 | } |
228 : | } | ||
229 : | edgomez | 195 | } else if ((start_code & ~0x1f) == VIDOBJ_START_CODE) { |
230 : | BitstreamSkip(bs, 32); // video_object_start_code | ||
231 : | } else if ((start_code & ~0xf) == VIDOBJLAY_START_CODE) { | ||
232 : | suxen_drol | 233 | //DPRINTF("video_object_layer"); |
233 : | edgomez | 195 | BitstreamSkip(bs, 32); // video_object_layer_start_code |
234 : | Isibaar | 3 | |
235 : | edgomez | 195 | BitstreamSkip(bs, 1); // random_accessible_vol |
236 : | Isibaar | 3 | |
237 : | // video_object_type_indication | ||
238 : | edgomez | 195 | 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 |
239 : | Isibaar | 3 | { |
240 : | suxen_drol | 233 | //DPRINTF("video_object_type_indication %i not supported ", |
241 : | // BitstreamShowBits(bs, 8)); | ||
242 : | Isibaar | 3 | return -1; |
243 : | } | ||
244 : | BitstreamSkip(bs, 8); | ||
245 : | |||
246 : | |||
247 : | edgomez | 195 | if (BitstreamGetBit(bs)) // is_object_layer_identifier |
248 : | Isibaar | 3 | { |
249 : | suxen_drol | 233 | //DPRINTF("+ is_object_layer_identifier"); |
250 : | edgomez | 195 | vol_ver_id = BitstreamGetBits(bs, 4); // video_object_layer_verid |
251 : | BitstreamSkip(bs, 3); // video_object_layer_priority | ||
252 : | } else { | ||
253 : | Isibaar | 3 | vol_ver_id = 1; |
254 : | } | ||
255 : | suxen_drol | 233 | //DPRINTF("vol_ver_id %i", vol_ver_id); |
256 : | Isibaar | 3 | |
257 : | if (BitstreamGetBits(bs, 4) == VIDOBJLAY_AR_EXTPAR) // aspect_ratio_info | ||
258 : | { | ||
259 : | suxen_drol | 233 | //DPRINTF("+ aspect_ratio_info"); |
260 : | edgomez | 195 | BitstreamSkip(bs, 8); // par_width |
261 : | BitstreamSkip(bs, 8); // par_height | ||
262 : | Isibaar | 3 | } |
263 : | |||
264 : | edgomez | 195 | if (BitstreamGetBit(bs)) // vol_control_parameters |
265 : | Isibaar | 3 | { |
266 : | suxen_drol | 233 | //DPRINTF("+ vol_control_parameters"); |
267 : | edgomez | 195 | BitstreamSkip(bs, 2); // chroma_format |
268 : | dec->low_delay = BitstreamGetBit(bs); // low_delay | ||
269 : | if (BitstreamGetBit(bs)) // vbv_parameters | ||
270 : | Isibaar | 3 | { |
271 : | suxen_drol | 233 | //DPRINTF("+ vbv_parameters"); |
272 : | edgomez | 195 | BitstreamSkip(bs, 15); // first_half_bitrate |
273 : | Isibaar | 3 | READ_MARKER(); |
274 : | edgomez | 195 | BitstreamSkip(bs, 15); // latter_half_bitrate |
275 : | Isibaar | 3 | READ_MARKER(); |
276 : | edgomez | 195 | BitstreamSkip(bs, 15); // first_half_vbv_buffer_size |
277 : | Isibaar | 3 | READ_MARKER(); |
278 : | edgomez | 195 | BitstreamSkip(bs, 3); // latter_half_vbv_buffer_size |
279 : | BitstreamSkip(bs, 11); // first_half_vbv_occupancy | ||
280 : | Isibaar | 3 | READ_MARKER(); |
281 : | edgomez | 195 | BitstreamSkip(bs, 15); // latter_half_vbv_occupancy |
282 : | Isibaar | 3 | READ_MARKER(); |
283 : | edgomez | 195 | |
284 : | Isibaar | 3 | } |
285 : | } | ||
286 : | |||
287 : | dec->shape = BitstreamGetBits(bs, 2); // video_object_layer_shape | ||
288 : | suxen_drol | 233 | //DPRINTF("shape %i", dec->shape); |
289 : | edgomez | 195 | |
290 : | if (dec->shape == VIDOBJLAY_SHAPE_GRAYSCALE && vol_ver_id != 1) { | ||
291 : | BitstreamSkip(bs, 4); // video_object_layer_shape_extension | ||
292 : | Isibaar | 3 | } |
293 : | |||
294 : | READ_MARKER(); | ||
295 : | |||
296 : | chenm001 | 156 | // *************************** for decode B-frame time *********************** |
297 : | time_increment_resolution = BitstreamGetBits(bs, 16); // vop_time_increment_resolution | ||
298 : | time_increment_resolution--; | ||
299 : | suxen_drol | 233 | //DPRINTF("time_increment_resolution = %i",time_increment_resolution); |
300 : | edgomez | 195 | if (time_increment_resolution > 0) { |
301 : | chenm001 | 156 | dec->time_inc_bits = log2bin(time_increment_resolution); |
302 : | edgomez | 195 | } else { |
303 : | Isibaar | 3 | // dec->time_inc_bits = 0; |
304 : | |||
305 : | // for "old" xvid compatibility, set time_inc_bits = 1 | ||
306 : | dec->time_inc_bits = 1; | ||
307 : | } | ||
308 : | |||
309 : | READ_MARKER(); | ||
310 : | |||
311 : | edgomez | 195 | if (BitstreamGetBit(bs)) // fixed_vop_rate |
312 : | Isibaar | 3 | { |
313 : | BitstreamSkip(bs, dec->time_inc_bits); // fixed_vop_time_increment | ||
314 : | } | ||
315 : | |||
316 : | edgomez | 195 | if (dec->shape != VIDOBJLAY_SHAPE_BINARY_ONLY) { |
317 : | Isibaar | 3 | |
318 : | edgomez | 195 | if (dec->shape == VIDOBJLAY_SHAPE_RECTANGULAR) { |
319 : | Isibaar | 3 | uint32_t width, height; |
320 : | |||
321 : | READ_MARKER(); | ||
322 : | edgomez | 195 | width = BitstreamGetBits(bs, 13); // video_object_layer_width |
323 : | suxen_drol | 233 | //DPRINTF("width %i", width); |
324 : | Isibaar | 3 | READ_MARKER(); |
325 : | edgomez | 195 | height = BitstreamGetBits(bs, 13); // video_object_layer_height |
326 : | suxen_drol | 233 | //DPRINTF("height %i", height); |
327 : | Isibaar | 3 | READ_MARKER(); |
328 : | |||
329 : | edgomez | 195 | if (width != dec->width || height != dec->height) { |
330 : | suxen_drol | 233 | //DPRINTF("FATAL: video dimension discrepancy ***"); |
331 : | //DPRINTF("bitstream width/height %i x %i", width, height); | ||
332 : | //DPRINTF("param width/height %i x %i", dec->width, dec->height); | ||
333 : | Isibaar | 3 | return -1; |
334 : | } | ||
335 : | |||
336 : | } | ||
337 : | h | 69 | |
338 : | edgomez | 195 | if ((dec->interlacing = BitstreamGetBit(bs))) { |
339 : | suxen_drol | 233 | //DPRINTF("vol: interlacing"); |
340 : | Isibaar | 3 | } |
341 : | |||
342 : | edgomez | 195 | if (!BitstreamGetBit(bs)) // obmc_disable |
343 : | Isibaar | 3 | { |
344 : | suxen_drol | 233 | //DPRINTF("IGNORED/TODO: !obmc_disable"); |
345 : | Isibaar | 3 | // TODO |
346 : | // fucking divx4.02 has this enabled | ||
347 : | } | ||
348 : | |||
349 : | edgomez | 195 | if (BitstreamGetBits(bs, (vol_ver_id == 1 ? 1 : 2))) // sprite_enable |
350 : | Isibaar | 3 | { |
351 : | suxen_drol | 233 | //DPRINTF("sprite_enable; not supported"); |
352 : | Isibaar | 3 | return -1; |
353 : | } | ||
354 : | edgomez | 195 | |
355 : | if (vol_ver_id != 1 && | ||
356 : | dec->shape != VIDOBJLAY_SHAPE_RECTANGULAR) { | ||
357 : | BitstreamSkip(bs, 1); // sadct_disable | ||
358 : | Isibaar | 3 | } |
359 : | |||
360 : | edgomez | 195 | if (BitstreamGetBit(bs)) // not_8_bit |
361 : | Isibaar | 3 | { |
362 : | suxen_drol | 233 | //DPRINTF("+ not_8_bit [IGNORED/TODO]"); |
363 : | Isibaar | 3 | dec->quant_bits = BitstreamGetBits(bs, 4); // quant_precision |
364 : | edgomez | 195 | BitstreamSkip(bs, 4); // bits_per_pixel |
365 : | } else { | ||
366 : | Isibaar | 3 | dec->quant_bits = 5; |
367 : | } | ||
368 : | |||
369 : | edgomez | 195 | if (dec->shape == VIDOBJLAY_SHAPE_GRAYSCALE) { |
370 : | BitstreamSkip(bs, 1); // no_gray_quant_update | ||
371 : | BitstreamSkip(bs, 1); // composition_method | ||
372 : | BitstreamSkip(bs, 1); // linear_composition | ||
373 : | Isibaar | 3 | } |
374 : | |||
375 : | edgomez | 195 | dec->quant_type = BitstreamGetBit(bs); // quant_type |
376 : | suxen_drol | 233 | //DPRINTF("**** quant_type %i", dec->quant_type); |
377 : | Isibaar | 3 | |
378 : | edgomez | 195 | if (dec->quant_type) { |
379 : | if (BitstreamGetBit(bs)) // load_intra_quant_mat | ||
380 : | Isibaar | 3 | { |
381 : | Isibaar | 20 | uint8_t matrix[64]; |
382 : | edgomez | 195 | |
383 : | Isibaar | 4 | bs_get_matrix(bs, matrix); |
384 : | set_intra_matrix(matrix); | ||
385 : | edgomez | 195 | } else |
386 : | Isibaar | 20 | set_intra_matrix(get_default_intra_matrix()); |
387 : | Isibaar | 4 | |
388 : | edgomez | 195 | if (BitstreamGetBit(bs)) // load_inter_quant_mat |
389 : | Isibaar | 3 | { |
390 : | edgomez | 195 | uint8_t matrix[64]; |
391 : | |||
392 : | Isibaar | 4 | bs_get_matrix(bs, matrix); |
393 : | set_inter_matrix(matrix); | ||
394 : | edgomez | 195 | } else |
395 : | Isibaar | 20 | set_inter_matrix(get_default_inter_matrix()); |
396 : | Isibaar | 3 | |
397 : | edgomez | 195 | if (dec->shape == VIDOBJLAY_SHAPE_GRAYSCALE) { |
398 : | Isibaar | 3 | // TODO |
399 : | suxen_drol | 233 | //DPRINTF("TODO: grayscale matrix stuff"); |
400 : | Isibaar | 3 | return -1; |
401 : | } | ||
402 : | Isibaar | 4 | |
403 : | Isibaar | 3 | } |
404 : | |||
405 : | edgomez | 195 | |
406 : | if (vol_ver_id != 1) { | ||
407 : | Isibaar | 3 | dec->quarterpel = BitstreamGetBit(bs); // quarter_sampe |
408 : | edgomez | 195 | if (dec->quarterpel) { |
409 : | suxen_drol | 233 | //DPRINTF("IGNORED/TODO: quarter_sample"); |
410 : | Isibaar | 3 | } |
411 : | edgomez | 195 | } else { |
412 : | Isibaar | 3 | dec->quarterpel = 0; |
413 : | } | ||
414 : | |||
415 : | edgomez | 195 | if (!BitstreamGetBit(bs)) // complexity_estimation_disable |
416 : | Isibaar | 3 | { |
417 : | suxen_drol | 233 | //DPRINTF("TODO: complexity_estimation header"); |
418 : | Isibaar | 3 | // TODO |
419 : | return -1; | ||
420 : | } | ||
421 : | |||
422 : | edgomez | 195 | if (!BitstreamGetBit(bs)) // resync_marker_disable |
423 : | Isibaar | 3 | { |
424 : | suxen_drol | 233 | //DPRINTF("IGNORED/TODO: !resync_marker_disable"); |
425 : | Isibaar | 3 | // TODO |
426 : | } | ||
427 : | |||
428 : | edgomez | 195 | if (BitstreamGetBit(bs)) // data_partitioned |
429 : | Isibaar | 3 | { |
430 : | suxen_drol | 233 | //DPRINTF("+ data_partitioned"); |
431 : | edgomez | 195 | BitstreamSkip(bs, 1); // reversible_vlc |
432 : | Isibaar | 3 | } |
433 : | |||
434 : | edgomez | 195 | if (vol_ver_id != 1) { |
435 : | if (BitstreamGetBit(bs)) // newpred_enable | ||
436 : | Isibaar | 3 | { |
437 : | suxen_drol | 233 | //DPRINTF("+ newpred_enable"); |
438 : | edgomez | 195 | BitstreamSkip(bs, 2); // requested_upstream_message_type |
439 : | BitstreamSkip(bs, 1); // newpred_segment_type | ||
440 : | Isibaar | 3 | } |
441 : | edgomez | 195 | if (BitstreamGetBit(bs)) // reduced_resolution_vop_enable |
442 : | Isibaar | 3 | { |
443 : | suxen_drol | 233 | //DPRINTF("TODO: reduced_resolution_vop_enable"); |
444 : | Isibaar | 3 | // TODO |
445 : | return -1; | ||
446 : | } | ||
447 : | } | ||
448 : | edgomez | 195 | |
449 : | if ((dec->scalability = BitstreamGetBit(bs))) // scalability | ||
450 : | Isibaar | 3 | { |
451 : | // TODO | ||
452 : | suxen_drol | 233 | //DPRINTF("TODO: scalability"); |
453 : | Isibaar | 3 | return -1; |
454 : | } | ||
455 : | edgomez | 195 | } else // dec->shape == BINARY_ONLY |
456 : | Isibaar | 3 | { |
457 : | edgomez | 195 | if (vol_ver_id != 1) { |
458 : | Isibaar | 3 | if (BitstreamGetBit(bs)) // scalability |
459 : | { | ||
460 : | // TODO | ||
461 : | suxen_drol | 233 | //DPRINTF("TODO: scalability"); |
462 : | Isibaar | 3 | return -1; |
463 : | } | ||
464 : | } | ||
465 : | edgomez | 195 | BitstreamSkip(bs, 1); // resync_marker_disable |
466 : | Isibaar | 3 | |
467 : | } | ||
468 : | |||
469 : | edgomez | 195 | } else if (start_code == GRPOFVOP_START_CODE) { |
470 : | suxen_drol | 233 | //DPRINTF("group_of_vop"); |
471 : | Isibaar | 3 | BitstreamSkip(bs, 32); |
472 : | { | ||
473 : | int hours, minutes, seconds; | ||
474 : | edgomez | 195 | |
475 : | Isibaar | 3 | hours = BitstreamGetBits(bs, 5); |
476 : | minutes = BitstreamGetBits(bs, 6); | ||
477 : | READ_MARKER(); | ||
478 : | seconds = BitstreamGetBits(bs, 6); | ||
479 : | suxen_drol | 233 | //DPRINTF("%ih %im %is", hours, minutes, seconds); |
480 : | Isibaar | 3 | } |
481 : | edgomez | 195 | BitstreamSkip(bs, 1); // closed_gov |
482 : | BitstreamSkip(bs, 1); // broken_link | ||
483 : | } else if (start_code == VOP_START_CODE) { | ||
484 : | suxen_drol | 233 | //DPRINTF("vop_start_code"); |
485 : | edgomez | 195 | BitstreamSkip(bs, 32); // vop_start_code |
486 : | Isibaar | 3 | |
487 : | edgomez | 195 | coding_type = BitstreamGetBits(bs, 2); // vop_coding_type |
488 : | suxen_drol | 233 | //DPRINTF("coding_type %i", coding_type); |
489 : | Isibaar | 3 | |
490 : | chenm001 | 156 | // *************************** for decode B-frame time *********************** |
491 : | edgomez | 195 | while (BitstreamGetBit(bs) != 0) // time_base |
492 : | chenm001 | 156 | time_incr++; |
493 : | edgomez | 195 | |
494 : | Isibaar | 3 | READ_MARKER(); |
495 : | edgomez | 195 | |
496 : | if (dec->time_inc_bits) { | ||
497 : | chenm001 | 156 | time_increment = (BitstreamGetBits(bs, dec->time_inc_bits)); // vop_time_increment |
498 : | Isibaar | 3 | } |
499 : | suxen_drol | 240 | |
500 : | /* | ||
501 : | DPRINTF("%c %i:%i", | ||
502 : | coding_type == I_VOP ? 'I' : coding_type == P_VOP ? 'P' : 'B', | ||
503 : | time_incr, time_increment); | ||
504 : | */ | ||
505 : | |||
506 : | edgomez | 195 | if (coding_type != B_VOP) { |
507 : | dec->last_time_base = dec->time_base; | ||
508 : | chenm001 | 156 | dec->time_base += time_incr; |
509 : | edgomez | 195 | dec->time = |
510 : | dec->time_base * time_increment_resolution + | ||
511 : | time_increment; | ||
512 : | dec->time_pp = (uint32_t) (dec->time - dec->last_non_b_time); | ||
513 : | dec->last_non_b_time = dec->time; | ||
514 : | } else { | ||
515 : | dec->time = | ||
516 : | (dec->last_time_base + | ||
517 : | time_incr) * time_increment_resolution + time_increment; | ||
518 : | dec->time_bp = (uint32_t) (dec->last_non_b_time - dec->time); | ||
519 : | chenm001 | 156 | } |
520 : | suxen_drol | 233 | //DPRINTF("time_increment %i",time_increment); |
521 : | Isibaar | 3 | |
522 : | READ_MARKER(); | ||
523 : | |||
524 : | edgomez | 195 | if (!BitstreamGetBit(bs)) // vop_coded |
525 : | Isibaar | 3 | { |
526 : | suxen_drol | 240 | //DPRINTF("**NOT CODED**"); |
527 : | Isibaar | 3 | return N_VOP; |
528 : | } | ||
529 : | |||
530 : | /* if (newpred_enable) | ||
531 : | edgomez | 195 | { |
532 : | } | ||
533 : | */ | ||
534 : | Isibaar | 3 | |
535 : | chenm001 | 156 | // fix a little bug by MinChen <chenm002@163.com> |
536 : | edgomez | 195 | if ((dec->shape != VIDOBJLAY_SHAPE_BINARY_ONLY) && |
537 : | (coding_type == P_VOP)) { | ||
538 : | Isibaar | 3 | *rounding = BitstreamGetBit(bs); // rounding_type |
539 : | suxen_drol | 233 | //DPRINTF("rounding %i", *rounding); |
540 : | Isibaar | 3 | } |
541 : | |||
542 : | /* if (reduced_resolution_enable) | ||
543 : | edgomez | 195 | { |
544 : | } | ||
545 : | */ | ||
546 : | Isibaar | 3 | |
547 : | edgomez | 195 | if (dec->shape != VIDOBJLAY_SHAPE_RECTANGULAR) { |
548 : | Isibaar | 3 | uint32_t width, height; |
549 : | uint32_t horiz_mc_ref, vert_mc_ref; | ||
550 : | edgomez | 195 | |
551 : | Isibaar | 3 | width = BitstreamGetBits(bs, 13); |
552 : | READ_MARKER(); | ||
553 : | height = BitstreamGetBits(bs, 13); | ||
554 : | READ_MARKER(); | ||
555 : | horiz_mc_ref = BitstreamGetBits(bs, 13); | ||
556 : | READ_MARKER(); | ||
557 : | vert_mc_ref = BitstreamGetBits(bs, 13); | ||
558 : | READ_MARKER(); | ||
559 : | |||
560 : | suxen_drol | 233 | //DPRINTF("vop_width/height %i x %i", width, height); |
561 : | //DPRINTF("ref %i x %i", horiz_mc_ref, vert_mc_ref); | ||
562 : | Isibaar | 3 | |
563 : | edgomez | 195 | BitstreamSkip(bs, 1); // change_conv_ratio_disable |
564 : | if (BitstreamGetBit(bs)) // vop_constant_alpha | ||
565 : | Isibaar | 3 | { |
566 : | edgomez | 195 | BitstreamSkip(bs, 8); // vop_constant_alpha_value |
567 : | Isibaar | 3 | } |
568 : | } | ||
569 : | |||
570 : | edgomez | 195 | |
571 : | if (dec->shape != VIDOBJLAY_SHAPE_BINARY_ONLY) { | ||
572 : | Isibaar | 3 | // intra_dc_vlc_threshold |
573 : | edgomez | 195 | *intra_dc_threshold = |
574 : | intra_dc_threshold_table[BitstreamGetBits(bs, 3)]; | ||
575 : | Isibaar | 3 | |
576 : | edgomez | 195 | if (dec->interlacing) { |
577 : | if ((dec->top_field_first = BitstreamGetBit(bs))) { | ||
578 : | suxen_drol | 233 | //DPRINTF("vop: top_field_first"); |
579 : | h | 69 | } |
580 : | edgomez | 195 | if ((dec->alternate_vertical_scan = BitstreamGetBit(bs))) { |
581 : | suxen_drol | 233 | //DPRINTF("vop: alternate_vertical_scan"); |
582 : | h | 69 | } |
583 : | } | ||
584 : | Isibaar | 3 | } |
585 : | edgomez | 195 | |
586 : | if ((*quant = BitstreamGetBits(bs, dec->quant_bits)) < 1) // vop_quant | ||
587 : | Isibaar | 157 | *quant = 1; |
588 : | |||
589 : | suxen_drol | 233 | //DPRINTF("quant %i", *quant); |
590 : | edgomez | 195 | |
591 : | if (coding_type != I_VOP) { | ||
592 : | *fcode_forward = BitstreamGetBits(bs, 3); // fcode_forward | ||
593 : | Isibaar | 3 | } |
594 : | edgomez | 195 | |
595 : | if (coding_type == B_VOP) { | ||
596 : | *fcode_backward = BitstreamGetBits(bs, 3); // fcode_backward | ||
597 : | Isibaar | 3 | } |
598 : | edgomez | 195 | if (!dec->scalability) { |
599 : | if ((dec->shape != VIDOBJLAY_SHAPE_RECTANGULAR) && | ||
600 : | (coding_type != I_VOP)) { | ||
601 : | BitstreamSkip(bs, 1); // vop_shape_coding_type | ||
602 : | chenm001 | 156 | } |
603 : | } | ||
604 : | Isibaar | 3 | return coding_type; |
605 : | edgomez | 195 | } else if (start_code == USERDATA_START_CODE) { |
606 : | suxen_drol | 233 | //DPRINTF("user_data"); |
607 : | edgomez | 195 | BitstreamSkip(bs, 32); // user_data_start_code |
608 : | } else // start_code == ? | ||
609 : | Isibaar | 3 | { |
610 : | edgomez | 195 | if (BitstreamShowBits(bs, 24) == 0x000001) { |
611 : | suxen_drol | 233 | //DPRINTF("*** WARNING: unknown start_code %x", |
612 : | // BitstreamShowBits(bs, 32)); | ||
613 : | Isibaar | 3 | } |
614 : | BitstreamSkip(bs, 8); | ||
615 : | } | ||
616 : | } | ||
617 : | while ((BitstreamPos(bs) >> 3) < bs->length); | ||
618 : | |||
619 : | suxen_drol | 233 | //DPRINTF("*** WARNING: no vop_start_code found"); |
620 : | edgomez | 195 | return -1; /* ignore it */ |
621 : | Isibaar | 3 | } |
622 : | |||
623 : | |||
624 : | /* write custom quant matrix */ | ||
625 : | |||
626 : | edgomez | 195 | static void |
627 : | bs_put_matrix(Bitstream * bs, | ||
628 : | const int16_t * matrix) | ||
629 : | Isibaar | 3 | { |
630 : | int i, j; | ||
631 : | const int last = matrix[scan_tables[0][63]]; | ||
632 : | |||
633 : | suxen_drol | 233 | for (j = 63; j > 0 && matrix[scan_tables[0][j - 1]] == last; j--); |
634 : | Isibaar | 3 | |
635 : | edgomez | 195 | for (i = 0; i <= j; i++) { |
636 : | Isibaar | 3 | BitstreamPutBits(bs, matrix[scan_tables[0][i]], 8); |
637 : | } | ||
638 : | |||
639 : | edgomez | 195 | if (j < 63) { |
640 : | Isibaar | 3 | BitstreamPutBits(bs, 0, 8); |
641 : | } | ||
642 : | } | ||
643 : | |||
644 : | |||
645 : | /* | ||
646 : | write vol header | ||
647 : | */ | ||
648 : | edgomez | 195 | void |
649 : | BitstreamWriteVolHeader(Bitstream * const bs, | ||
650 : | const MBParam * pParam, | ||
651 : | const FRAMEINFO * frame) | ||
652 : | Isibaar | 3 | { |
653 : | // video object_start_code & vo_id | ||
654 : | edgomez | 195 | BitstreamPad(bs); |
655 : | Isibaar | 3 | BitstreamPutBits(bs, VO_START_CODE, 27); |
656 : | edgomez | 195 | BitstreamPutBits(bs, 0, 5); |
657 : | Isibaar | 3 | |
658 : | // video_object_layer_start_code & vol_id | ||
659 : | BitstreamPutBits(bs, VOL_START_CODE, 28); | ||
660 : | BitstreamPutBits(bs, 0, 4); | ||
661 : | |||
662 : | edgomez | 195 | BitstreamPutBit(bs, 0); // random_accessible_vol |
663 : | BitstreamPutBits(bs, 0, 8); // video_object_type_indication | ||
664 : | BitstreamPutBit(bs, 0); // is_object_layer_identified (0=not given) | ||
665 : | BitstreamPutBits(bs, 1, 4); // aspect_ratio_info (1=1:1) | ||
666 : | suxen_drol | 164 | |
667 : | #ifdef BFRAMES | ||
668 : | edgomez | 195 | if (pParam->max_bframes > 0) { |
669 : | suxen_drol | 233 | //DPRINTF("low_delay=1"); |
670 : | edgomez | 195 | BitstreamPutBit(bs, 1); // vol_control_parameters |
671 : | BitstreamPutBits(bs, 1, 2); // chroma_format 1="4:2:0" | ||
672 : | BitstreamPutBit(bs, 0); // low_delay | ||
673 : | BitstreamPutBit(bs, 0); // vbv_parameters (0=not given) | ||
674 : | } else | ||
675 : | suxen_drol | 164 | #endif |
676 : | { | ||
677 : | edgomez | 195 | BitstreamPutBits(bs, 0, 1); // vol_control_parameters (0=not given) |
678 : | suxen_drol | 164 | } |
679 : | |||
680 : | |||
681 : | edgomez | 195 | BitstreamPutBits(bs, 0, 2); // video_object_layer_shape (0=rectangular) |
682 : | Isibaar | 3 | |
683 : | WRITE_MARKER(); | ||
684 : | edgomez | 195 | |
685 : | Isibaar | 3 | /* time_increment_resolution; ignored by current decore versions |
686 : | edgomez | 195 | eg. 2fps res=2 inc=1 |
687 : | 25fps res=25 inc=1 | ||
688 : | 29.97fps res=30000 inc=1001 | ||
689 : | */ | ||
690 : | suxen_drol | 163 | #ifdef BFRAMES |
691 : | BitstreamPutBits(bs, pParam->fbase, 16); | ||
692 : | #else | ||
693 : | Isibaar | 3 | BitstreamPutBits(bs, 2, 16); |
694 : | suxen_drol | 163 | #endif |
695 : | Isibaar | 3 | |
696 : | WRITE_MARKER(); | ||
697 : | |||
698 : | suxen_drol | 241 | #ifdef BFRAMES |
699 : | BitstreamPutBit(bs, 1); // fixed_vop_rate = 1 | ||
700 : | BitstreamPutBits(bs, pParam->fincr, log2bin(pParam->fbase)); // fixed_vop_time_increment | ||
701 : | #else | ||
702 : | BitstreamPutBit(bs, 0); // fixed_vop_rate = 0 | ||
703 : | #endif | ||
704 : | Isibaar | 3 | |
705 : | WRITE_MARKER(); | ||
706 : | edgomez | 195 | BitstreamPutBits(bs, pParam->width, 13); // width |
707 : | Isibaar | 3 | WRITE_MARKER(); |
708 : | edgomez | 195 | BitstreamPutBits(bs, pParam->height, 13); // height |
709 : | Isibaar | 3 | WRITE_MARKER(); |
710 : | edgomez | 195 | |
711 : | BitstreamPutBit(bs, frame->global_flags & XVID_INTERLACING); // interlace | ||
712 : | Isibaar | 3 | BitstreamPutBit(bs, 1); // obmc_disable (overlapped block motion compensation) |
713 : | BitstreamPutBit(bs, 0); // sprite_enable | ||
714 : | BitstreamPutBit(bs, 0); // not_in_bit | ||
715 : | |||
716 : | // quant_type 0=h.263 1=mpeg4(quantizer tables) | ||
717 : | suxen_drol | 136 | BitstreamPutBit(bs, pParam->m_quant_type); |
718 : | edgomez | 195 | |
719 : | if (pParam->m_quant_type) { | ||
720 : | Isibaar | 4 | BitstreamPutBit(bs, get_intra_matrix_status()); // load_intra_quant_mat |
721 : | edgomez | 195 | if (get_intra_matrix_status()) { |
722 : | Isibaar | 4 | bs_put_matrix(bs, get_intra_matrix()); |
723 : | Isibaar | 3 | } |
724 : | |||
725 : | edgomez | 195 | BitstreamPutBit(bs, get_inter_matrix_status()); // load_inter_quant_mat |
726 : | if (get_inter_matrix_status()) { | ||
727 : | Isibaar | 4 | bs_put_matrix(bs, get_inter_matrix()); |
728 : | Isibaar | 3 | } |
729 : | |||
730 : | } | ||
731 : | |||
732 : | BitstreamPutBit(bs, 1); // complexity_estimation_disable | ||
733 : | BitstreamPutBit(bs, 1); // resync_marker_disable | ||
734 : | BitstreamPutBit(bs, 0); // data_partitioned | ||
735 : | BitstreamPutBit(bs, 0); // scalability | ||
736 : | } | ||
737 : | |||
738 : | |||
739 : | /* | ||
740 : | write vop header | ||
741 : | |||
742 : | NOTE: doesnt handle bother with time_base & time_inc | ||
743 : | time_base = n seconds since last resync (eg. last iframe) | ||
744 : | time_inc = nth of a second since last resync | ||
745 : | (decoder uses these values to determine precise time since last resync) | ||
746 : | */ | ||
747 : | edgomez | 195 | void |
748 : | BitstreamWriteVopHeader(Bitstream * const bs, | ||
749 : | const MBParam * pParam, | ||
750 : | suxen_drol | 229 | const FRAMEINFO * frame, |
751 : | int vop_coded) | ||
752 : | Isibaar | 3 | { |
753 : | suxen_drol | 152 | #ifdef BFRAMES |
754 : | uint32_t i; | ||
755 : | #endif | ||
756 : | edgomez | 195 | BitstreamPad(bs); |
757 : | BitstreamPutBits(bs, VOP_START_CODE, 32); | ||
758 : | Isibaar | 3 | |
759 : | edgomez | 195 | BitstreamPutBits(bs, frame->coding_type, 2); |
760 : | |||
761 : | Isibaar | 3 | // time_base = 0 write n x PutBit(1), PutBit(0) |
762 : | suxen_drol | 152 | #ifdef BFRAMES |
763 : | edgomez | 195 | for (i = 0; i < frame->seconds; i++) { |
764 : | suxen_drol | 152 | BitstreamPutBit(bs, 1); |
765 : | } | ||
766 : | BitstreamPutBit(bs, 0); | ||
767 : | #else | ||
768 : | Isibaar | 3 | BitstreamPutBits(bs, 0, 1); |
769 : | suxen_drol | 152 | #endif |
770 : | Isibaar | 3 | |
771 : | WRITE_MARKER(); | ||
772 : | |||
773 : | // time_increment: value=nth_of_sec, nbits = log2(resolution) | ||
774 : | suxen_drol | 152 | #ifdef BFRAMES |
775 : | edgomez | 195 | BitstreamPutBits(bs, frame->ticks, log2bin(pParam->fbase)); |
776 : | suxen_drol | 229 | DPRINTF("[%i:%i] %c\n", frame->seconds, frame->ticks, |
777 : | edgomez | 195 | frame->coding_type == I_VOP ? 'I' : frame->coding_type == |
778 : | P_VOP ? 'P' : 'B'); | ||
779 : | suxen_drol | 152 | #else |
780 : | edgomez | 195 | BitstreamPutBits(bs, 1, 1); |
781 : | suxen_drol | 152 | #endif |
782 : | Isibaar | 3 | |
783 : | WRITE_MARKER(); | ||
784 : | |||
785 : | suxen_drol | 229 | if (!vop_coded) { |
786 : | BitstreamPutBits(bs, 0, 1); | ||
787 : | return; | ||
788 : | } | ||
789 : | |||
790 : | edgomez | 195 | BitstreamPutBits(bs, 1, 1); // vop_coded |
791 : | Isibaar | 3 | |
792 : | suxen_drol | 163 | if (frame->coding_type == P_VOP) |
793 : | suxen_drol | 136 | BitstreamPutBits(bs, frame->rounding_type, 1); |
794 : | Isibaar | 3 | |
795 : | edgomez | 195 | BitstreamPutBits(bs, 0, 3); // intra_dc_vlc_threshold |
796 : | |||
797 : | if (frame->global_flags & XVID_INTERLACING) { | ||
798 : | BitstreamPutBit(bs, 1); // top field first | ||
799 : | BitstreamPutBit(bs, 0); // alternate vertical scan | ||
800 : | h | 69 | } |
801 : | |||
802 : | edgomez | 195 | BitstreamPutBits(bs, frame->quant, 5); // quantizer |
803 : | |||
804 : | suxen_drol | 136 | if (frame->coding_type != I_VOP) |
805 : | edgomez | 195 | BitstreamPutBits(bs, frame->fcode, 3); // forward_fixed_code |
806 : | suxen_drol | 152 | |
807 : | if (frame->coding_type == B_VOP) | ||
808 : | edgomez | 195 | BitstreamPutBits(bs, frame->bcode, 3); // backward_fixed_code |
809 : | suxen_drol | 152 | |
810 : | Isibaar | 3 | } |
811 : | suxen_drol | 229 | |
812 : | |||
813 : | void | ||
814 : | BitstreamWriteUserData(Bitstream * const bs, | ||
815 : | uint8_t * data, | ||
816 : | const int length) | ||
817 : | { | ||
818 : | int i; | ||
819 : | |||
820 : | BitstreamPad(bs); | ||
821 : | BitstreamPutBits(bs, USERDATA_START_CODE, 32); | ||
822 : | |||
823 : | for (i = 0; i < length; i++) { | ||
824 : | BitstreamPutBits(bs, data[i], 8); | ||
825 : | } | ||
826 : | |||
827 : | } |
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