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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 : | chl | 619 | * 28.10.2002 GMC support - gruel * |
45 : | Isibaar | 579 | * 04.10.2002 qpel support - Isibaar * |
46 : | chenm001 | 294 | * 11.07.2002 add VOP width & height return to dec when dec->width * |
47 : | * or dec->height is 0 (for use in examples/ex1.c) * | ||
48 : | * MinChen <chenm001@163.com> * | ||
49 : | * 22.05.2002 bs_put_matrix fix * | ||
50 : | suxen_drol | 229 | * 20.05.2002 added BitstreamWriteUserData * |
51 : | Isibaar | 579 | * 19.06.2002 Fix a little bug in use custom quant matrix * |
52 : | * MinChen <chenm001@163.com> * | ||
53 : | * 08.05.2002 add low_delay support for B_VOP decode * | ||
54 : | * MinChen <chenm001@163.com> * | ||
55 : | suxen_drol | 164 | * 06.05.2002 low_delay * |
56 : | suxen_drol | 163 | * 06.05.2002 fixed fincr/fbase error * |
57 : | * 01.05.2002 added BVOP support to BitstreamWriteVopHeader * | ||
58 : | chenm001 | 124 | * 15.04.2002 rewrite log2bin use asm386 By MinChen <chenm001@163.com> * |
59 : | chenm001 | 223 | * 26.03.2002 interlacing support * |
60 : | * 03.03.2002 qmatrix writing * | ||
61 : | * 03.03.2002 merged BITREADER and BITWRITER * | ||
62 : | Isibaar | 579 | * 30.02.2002 intra_dc_threshold support * |
63 : | * 04.12.2001 support for additional headers * | ||
64 : | * 16.12.2001 inital version * | ||
65 : | * * | ||
66 : | Isibaar | 3 | ******************************************************************************/ |
67 : | |||
68 : | |||
69 : | #include "bitstream.h" | ||
70 : | #include "zigzag.h" | ||
71 : | Isibaar | 4 | #include "../quant/quant_matrix.h" |
72 : | chl | 619 | #include "mbcoding.h" |
73 : | Isibaar | 3 | |
74 : | chenm001 | 124 | |
75 : | edgomez | 195 | static uint32_t __inline |
76 : | log2bin(uint32_t value) | ||
77 : | Isibaar | 3 | { |
78 : | chenm001 | 124 | /* Changed by Chenm001 */ |
79 : | #ifndef WIN32 | ||
80 : | Isibaar | 3 | int n = 0; |
81 : | edgomez | 195 | |
82 : | while (value) { | ||
83 : | Isibaar | 3 | value >>= 1; |
84 : | n++; | ||
85 : | } | ||
86 : | return n; | ||
87 : | chenm001 | 124 | #else |
88 : | edgomez | 195 | __asm { |
89 : | suxen_drol | 206 | bsr eax, value |
90 : | inc eax | ||
91 : | } | ||
92 : | chenm001 | 124 | #endif |
93 : | Isibaar | 3 | } |
94 : | |||
95 : | |||
96 : | edgomez | 195 | static const uint32_t intra_dc_threshold_table[] = { |
97 : | 32, /* never use */ | ||
98 : | Isibaar | 3 | 13, |
99 : | 15, | ||
100 : | 17, | ||
101 : | 19, | ||
102 : | 21, | ||
103 : | 23, | ||
104 : | 1, | ||
105 : | }; | ||
106 : | |||
107 : | |||
108 : | edgomez | 195 | void |
109 : | bs_get_matrix(Bitstream * bs, | ||
110 : | uint8_t * matrix) | ||
111 : | { | ||
112 : | int i = 0; | ||
113 : | int last, value = 0; | ||
114 : | Isibaar | 4 | |
115 : | edgomez | 195 | do { |
116 : | last = value; | ||
117 : | value = BitstreamGetBits(bs, 8); | ||
118 : | matrix[scan_tables[0][i++]] = value; | ||
119 : | } | ||
120 : | while (value != 0 && i < 64); | ||
121 : | chenm001 | 223 | i--; // fix little bug at coeff not full |
122 : | edgomez | 195 | |
123 : | while (i < 64) { | ||
124 : | matrix[scan_tables[0][i++]] = last; | ||
125 : | } | ||
126 : | } | ||
127 : | |||
128 : | suxen_drol | 248 | |
129 : | |||
130 : | // for PVOP addbits == fcode - 1 | ||
131 : | // for BVOP addbits == max(fcode,bcode) - 1 | ||
132 : | // returns mbpos | ||
133 : | int | ||
134 : | suxen_drol | 252 | read_video_packet_header(Bitstream *bs, const int addbits, int * quant) |
135 : | suxen_drol | 248 | { |
136 : | int nbits; | ||
137 : | int mbnum; | ||
138 : | int hec; | ||
139 : | |||
140 : | suxen_drol | 252 | nbits = NUMBITS_VP_RESYNC_MARKER + addbits; |
141 : | suxen_drol | 248 | |
142 : | BitstreamSkip(bs, BitstreamNumBitsToByteAlign(bs)); | ||
143 : | BitstreamSkip(bs, nbits); | ||
144 : | |||
145 : | suxen_drol | 252 | DPRINTF(DPRINTF_STARTCODE, "<video_packet_header>"); |
146 : | |||
147 : | suxen_drol | 248 | // if (dec->shape != VIDOBJLAY_SHAPE_RECTANGULAR) { |
148 : | // hec | ||
149 : | // vop_width | ||
150 : | // marker_bit | ||
151 : | // vop_height | ||
152 : | // marker_bit | ||
153 : | |||
154 : | //} | ||
155 : | |||
156 : | mbnum = BitstreamGetBits(bs, 9); | ||
157 : | suxen_drol | 252 | DPRINTF(DPRINTF_HEADER, "mbnum %i", mbnum); |
158 : | suxen_drol | 248 | |
159 : | // if (dec->shape != VIDOBJLAY_SHAPE_BINARYONLY) | ||
160 : | suxen_drol | 252 | *quant = BitstreamGetBits(bs, 5); |
161 : | DPRINTF(DPRINTF_HEADER, "quant %i", *quant); | ||
162 : | suxen_drol | 248 | |
163 : | // if (dec->shape != VIDOBJLAY_SHAPE_RECTANGULAR) | ||
164 : | hec = BitstreamGetBit(bs); | ||
165 : | suxen_drol | 252 | DPRINTF(DPRINTF_HEADER, "header_extension_code %i", hec); |
166 : | suxen_drol | 248 | // if (hec) |
167 : | // .. decoder hec-header ... | ||
168 : | |||
169 : | return mbnum; | ||
170 : | } | ||
171 : | |||
172 : | |||
173 : | |||
174 : | Isibaar | 3 | /* |
175 : | decode headers | ||
176 : | returns coding_type, or -1 if error | ||
177 : | */ | ||
178 : | |||
179 : | suxen_drol | 252 | #define VIDOBJ_START_CODE_MASK 0x0000001f |
180 : | #define VIDOBJLAY_START_CODE_MASK 0x0000000f | ||
181 : | |||
182 : | edgomez | 195 | int |
183 : | BitstreamReadHeaders(Bitstream * bs, | ||
184 : | DECODER * dec, | ||
185 : | uint32_t * rounding, | ||
186 : | uint32_t * quant, | ||
187 : | uint32_t * fcode_forward, | ||
188 : | uint32_t * fcode_backward, | ||
189 : | uint32_t * intra_dc_threshold) | ||
190 : | Isibaar | 3 | { |
191 : | uint32_t vol_ver_id; | ||
192 : | chenm001 | 156 | static uint32_t time_increment_resolution; |
193 : | Isibaar | 3 | uint32_t coding_type; |
194 : | uint32_t start_code; | ||
195 : | edgomez | 195 | uint32_t time_incr = 0; |
196 : | int32_t time_increment; | ||
197 : | chenm001 | 156 | |
198 : | edgomez | 195 | do { |
199 : | Isibaar | 3 | BitstreamByteAlign(bs); |
200 : | start_code = BitstreamShowBits(bs, 32); | ||
201 : | |||
202 : | edgomez | 195 | if (start_code == VISOBJSEQ_START_CODE) { |
203 : | suxen_drol | 252 | |
204 : | int profile; | ||
205 : | |||
206 : | DPRINTF(DPRINTF_STARTCODE, "<visual_object_sequence>"); | ||
207 : | |||
208 : | edgomez | 195 | BitstreamSkip(bs, 32); // visual_object_sequence_start_code |
209 : | suxen_drol | 252 | profile = BitstreamGetBits(bs, 8); // profile_and_level_indication |
210 : | |||
211 : | DPRINTF(DPRINTF_HEADER, "profile_and_level_indication %i", profile); | ||
212 : | |||
213 : | edgomez | 195 | } else if (start_code == VISOBJSEQ_STOP_CODE) { |
214 : | suxen_drol | 252 | |
215 : | edgomez | 195 | BitstreamSkip(bs, 32); // visual_object_sequence_stop_code |
216 : | suxen_drol | 252 | |
217 : | DPRINTF(DPRINTF_STARTCODE, "</visual_object_sequence>"); | ||
218 : | |||
219 : | edgomez | 195 | } else if (start_code == VISOBJ_START_CODE) { |
220 : | suxen_drol | 252 | |
221 : | DPRINTF(DPRINTF_STARTCODE, "<visual_object>"); | ||
222 : | |||
223 : | edgomez | 195 | BitstreamSkip(bs, 32); // visual_object_start_code |
224 : | if (BitstreamGetBit(bs)) // is_visual_object_identified | ||
225 : | Isibaar | 3 | { |
226 : | edgomez | 195 | vol_ver_id = BitstreamGetBits(bs, 4); // visual_object_ver_id |
227 : | suxen_drol | 252 | DPRINTF(DPRINTF_HEADER,"ver_id %i", vol_ver_id); |
228 : | edgomez | 195 | BitstreamSkip(bs, 3); // visual_object_priority |
229 : | } else { | ||
230 : | Isibaar | 3 | vol_ver_id = 1; |
231 : | } | ||
232 : | |||
233 : | if (BitstreamShowBits(bs, 4) != VISOBJ_TYPE_VIDEO) // visual_object_type | ||
234 : | { | ||
235 : | suxen_drol | 252 | DPRINTF(DPRINTF_ERROR, "visual_object_type != video"); |
236 : | Isibaar | 3 | return -1; |
237 : | } | ||
238 : | BitstreamSkip(bs, 4); | ||
239 : | |||
240 : | // video_signal_type | ||
241 : | |||
242 : | edgomez | 195 | if (BitstreamGetBit(bs)) // video_signal_type |
243 : | Isibaar | 3 | { |
244 : | suxen_drol | 252 | DPRINTF(DPRINTF_HEADER,"+ video_signal_type"); |
245 : | edgomez | 195 | BitstreamSkip(bs, 3); // video_format |
246 : | BitstreamSkip(bs, 1); // video_range | ||
247 : | if (BitstreamGetBit(bs)) // color_description | ||
248 : | Isibaar | 3 | { |
249 : | suxen_drol | 252 | DPRINTF(DPRINTF_HEADER,"+ color_description"); |
250 : | edgomez | 195 | BitstreamSkip(bs, 8); // color_primaries |
251 : | BitstreamSkip(bs, 8); // transfer_characteristics | ||
252 : | BitstreamSkip(bs, 8); // matrix_coefficients | ||
253 : | Isibaar | 3 | } |
254 : | } | ||
255 : | suxen_drol | 252 | } else if ((start_code & ~VIDOBJ_START_CODE_MASK) == VIDOBJ_START_CODE) { |
256 : | |||
257 : | DPRINTF(DPRINTF_STARTCODE, "<video_object>"); | ||
258 : | DPRINTF(DPRINTF_HEADER, "vo id %i", start_code & VIDOBJ_START_CODE_MASK); | ||
259 : | |||
260 : | edgomez | 195 | BitstreamSkip(bs, 32); // video_object_start_code |
261 : | suxen_drol | 252 | |
262 : | } else if ((start_code & ~VIDOBJLAY_START_CODE_MASK) == VIDOBJLAY_START_CODE) { | ||
263 : | |||
264 : | DPRINTF(DPRINTF_STARTCODE, "<video_object_layer>"); | ||
265 : | DPRINTF(DPRINTF_HEADER, "vol id %i", start_code & VIDOBJLAY_START_CODE_MASK); | ||
266 : | |||
267 : | edgomez | 195 | BitstreamSkip(bs, 32); // video_object_layer_start_code |
268 : | Isibaar | 3 | |
269 : | edgomez | 195 | BitstreamSkip(bs, 1); // random_accessible_vol |
270 : | Isibaar | 3 | |
271 : | // video_object_type_indication | ||
272 : | 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 |
273 : | Isibaar | 3 | { |
274 : | suxen_drol | 252 | DPRINTF(DPRINTF_ERROR,"video_object_type_indication %i not supported ", |
275 : | BitstreamShowBits(bs, 8)); | ||
276 : | Isibaar | 3 | return -1; |
277 : | } | ||
278 : | BitstreamSkip(bs, 8); | ||
279 : | |||
280 : | |||
281 : | edgomez | 195 | if (BitstreamGetBit(bs)) // is_object_layer_identifier |
282 : | Isibaar | 3 | { |
283 : | suxen_drol | 252 | DPRINTF(DPRINTF_HEADER, "+ is_object_layer_identifier"); |
284 : | edgomez | 195 | vol_ver_id = BitstreamGetBits(bs, 4); // video_object_layer_verid |
285 : | suxen_drol | 252 | DPRINTF(DPRINTF_HEADER,"ver_id %i", vol_ver_id); |
286 : | edgomez | 195 | BitstreamSkip(bs, 3); // video_object_layer_priority |
287 : | } else { | ||
288 : | Isibaar | 3 | vol_ver_id = 1; |
289 : | } | ||
290 : | |||
291 : | if (BitstreamGetBits(bs, 4) == VIDOBJLAY_AR_EXTPAR) // aspect_ratio_info | ||
292 : | { | ||
293 : | suxen_drol | 252 | DPRINTF(DPRINTF_HEADER, "+ aspect_ratio_info"); |
294 : | edgomez | 195 | BitstreamSkip(bs, 8); // par_width |
295 : | BitstreamSkip(bs, 8); // par_height | ||
296 : | Isibaar | 3 | } |
297 : | |||
298 : | edgomez | 195 | if (BitstreamGetBit(bs)) // vol_control_parameters |
299 : | Isibaar | 3 | { |
300 : | suxen_drol | 252 | DPRINTF(DPRINTF_HEADER, "+ vol_control_parameters"); |
301 : | edgomez | 195 | BitstreamSkip(bs, 2); // chroma_format |
302 : | dec->low_delay = BitstreamGetBit(bs); // low_delay | ||
303 : | suxen_drol | 252 | DPRINTF(DPRINTF_HEADER, "low_delay %i", dec->low_delay); |
304 : | edgomez | 195 | if (BitstreamGetBit(bs)) // vbv_parameters |
305 : | Isibaar | 3 | { |
306 : | suxen_drol | 252 | DPRINTF(DPRINTF_HEADER,"+ vbv_parameters"); |
307 : | edgomez | 195 | BitstreamSkip(bs, 15); // first_half_bitrate |
308 : | Isibaar | 3 | READ_MARKER(); |
309 : | edgomez | 195 | BitstreamSkip(bs, 15); // latter_half_bitrate |
310 : | Isibaar | 3 | READ_MARKER(); |
311 : | edgomez | 195 | BitstreamSkip(bs, 15); // first_half_vbv_buffer_size |
312 : | Isibaar | 3 | READ_MARKER(); |
313 : | edgomez | 195 | BitstreamSkip(bs, 3); // latter_half_vbv_buffer_size |
314 : | BitstreamSkip(bs, 11); // first_half_vbv_occupancy | ||
315 : | Isibaar | 3 | READ_MARKER(); |
316 : | edgomez | 195 | BitstreamSkip(bs, 15); // latter_half_vbv_occupancy |
317 : | Isibaar | 3 | READ_MARKER(); |
318 : | edgomez | 195 | |
319 : | Isibaar | 3 | } |
320 : | } | ||
321 : | |||
322 : | dec->shape = BitstreamGetBits(bs, 2); // video_object_layer_shape | ||
323 : | suxen_drol | 252 | DPRINTF(DPRINTF_HEADER, "shape %i", dec->shape); |
324 : | edgomez | 195 | |
325 : | if (dec->shape == VIDOBJLAY_SHAPE_GRAYSCALE && vol_ver_id != 1) { | ||
326 : | BitstreamSkip(bs, 4); // video_object_layer_shape_extension | ||
327 : | Isibaar | 3 | } |
328 : | |||
329 : | READ_MARKER(); | ||
330 : | |||
331 : | chenm001 | 156 | // *************************** for decode B-frame time *********************** |
332 : | time_increment_resolution = BitstreamGetBits(bs, 16); // vop_time_increment_resolution | ||
333 : | suxen_drol | 252 | |
334 : | DPRINTF(DPRINTF_HEADER,"vop_time_increment_resolution %i", time_increment_resolution); | ||
335 : | |||
336 : | chl | 313 | // time_increment_resolution--; |
337 : | suxen_drol | 252 | |
338 : | edgomez | 195 | if (time_increment_resolution > 0) { |
339 : | chl | 313 | dec->time_inc_bits = log2bin(time_increment_resolution-1); |
340 : | edgomez | 195 | } else { |
341 : | Isibaar | 3 | // dec->time_inc_bits = 0; |
342 : | // for "old" xvid compatibility, set time_inc_bits = 1 | ||
343 : | dec->time_inc_bits = 1; | ||
344 : | } | ||
345 : | |||
346 : | READ_MARKER(); | ||
347 : | |||
348 : | edgomez | 195 | if (BitstreamGetBit(bs)) // fixed_vop_rate |
349 : | Isibaar | 3 | { |
350 : | suxen_drol | 252 | DPRINTF(DPRINTF_HEADER, "+ fixed_vop_rate"); |
351 : | Isibaar | 3 | BitstreamSkip(bs, dec->time_inc_bits); // fixed_vop_time_increment |
352 : | } | ||
353 : | |||
354 : | edgomez | 195 | if (dec->shape != VIDOBJLAY_SHAPE_BINARY_ONLY) { |
355 : | Isibaar | 3 | |
356 : | edgomez | 195 | if (dec->shape == VIDOBJLAY_SHAPE_RECTANGULAR) { |
357 : | Isibaar | 3 | uint32_t width, height; |
358 : | |||
359 : | READ_MARKER(); | ||
360 : | edgomez | 195 | width = BitstreamGetBits(bs, 13); // video_object_layer_width |
361 : | Isibaar | 3 | READ_MARKER(); |
362 : | edgomez | 195 | height = BitstreamGetBits(bs, 13); // video_object_layer_height |
363 : | Isibaar | 3 | READ_MARKER(); |
364 : | |||
365 : | suxen_drol | 252 | DPRINTF(DPRINTF_HEADER, "width %i", width); |
366 : | DPRINTF(DPRINTF_HEADER, "height %i", height); | ||
367 : | |||
368 : | chenm001 | 294 | // for auto set width & height |
369 : | if (dec->width == 0) | ||
370 : | dec->width = width; | ||
371 : | if (dec->height == 0) | ||
372 : | dec->height = height; | ||
373 : | |||
374 : | edgomez | 195 | if (width != dec->width || height != dec->height) { |
375 : | suxen_drol | 252 | DPRINTF(DPRINTF_ERROR, "XVID_DEC_PARAM width/height does not match bitstream"); |
376 : | Isibaar | 3 | return -1; |
377 : | } | ||
378 : | |||
379 : | } | ||
380 : | h | 69 | |
381 : | suxen_drol | 252 | dec->interlacing = BitstreamGetBit(bs); |
382 : | DPRINTF(DPRINTF_HEADER, "interlace", dec->interlacing); | ||
383 : | Isibaar | 3 | |
384 : | edgomez | 195 | if (!BitstreamGetBit(bs)) // obmc_disable |
385 : | Isibaar | 3 | { |
386 : | suxen_drol | 252 | DPRINTF(DPRINTF_ERROR, "obmc_disabled==false not supported"); |
387 : | Isibaar | 3 | // TODO |
388 : | // fucking divx4.02 has this enabled | ||
389 : | } | ||
390 : | |||
391 : | edgomez | 195 | if (BitstreamGetBits(bs, (vol_ver_id == 1 ? 1 : 2))) // sprite_enable |
392 : | Isibaar | 3 | { |
393 : | suxen_drol | 252 | DPRINTF(DPRINTF_ERROR, "spriate_enabled not supported"); |
394 : | Isibaar | 3 | return -1; |
395 : | } | ||
396 : | edgomez | 195 | |
397 : | if (vol_ver_id != 1 && | ||
398 : | dec->shape != VIDOBJLAY_SHAPE_RECTANGULAR) { | ||
399 : | BitstreamSkip(bs, 1); // sadct_disable | ||
400 : | Isibaar | 3 | } |
401 : | |||
402 : | edgomez | 195 | if (BitstreamGetBit(bs)) // not_8_bit |
403 : | Isibaar | 3 | { |
404 : | suxen_drol | 252 | DPRINTF(DPRINTF_HEADER, "not_8_bit==true (ignored)"); |
405 : | Isibaar | 3 | dec->quant_bits = BitstreamGetBits(bs, 4); // quant_precision |
406 : | edgomez | 195 | BitstreamSkip(bs, 4); // bits_per_pixel |
407 : | } else { | ||
408 : | Isibaar | 3 | dec->quant_bits = 5; |
409 : | } | ||
410 : | |||
411 : | edgomez | 195 | if (dec->shape == VIDOBJLAY_SHAPE_GRAYSCALE) { |
412 : | BitstreamSkip(bs, 1); // no_gray_quant_update | ||
413 : | BitstreamSkip(bs, 1); // composition_method | ||
414 : | BitstreamSkip(bs, 1); // linear_composition | ||
415 : | Isibaar | 3 | } |
416 : | |||
417 : | edgomez | 195 | dec->quant_type = BitstreamGetBit(bs); // quant_type |
418 : | suxen_drol | 252 | DPRINTF(DPRINTF_HEADER, "quant_type %i", dec->quant_type); |
419 : | Isibaar | 3 | |
420 : | edgomez | 195 | if (dec->quant_type) { |
421 : | if (BitstreamGetBit(bs)) // load_intra_quant_mat | ||
422 : | Isibaar | 3 | { |
423 : | Isibaar | 20 | uint8_t matrix[64]; |
424 : | edgomez | 195 | |
425 : | suxen_drol | 252 | DPRINTF(DPRINTF_HEADER, "load_intra_quant_mat"); |
426 : | |||
427 : | Isibaar | 4 | bs_get_matrix(bs, matrix); |
428 : | set_intra_matrix(matrix); | ||
429 : | edgomez | 195 | } else |
430 : | Isibaar | 20 | set_intra_matrix(get_default_intra_matrix()); |
431 : | Isibaar | 4 | |
432 : | edgomez | 195 | if (BitstreamGetBit(bs)) // load_inter_quant_mat |
433 : | Isibaar | 3 | { |
434 : | edgomez | 195 | uint8_t matrix[64]; |
435 : | suxen_drol | 252 | |
436 : | DPRINTF(DPRINTF_HEADER, "load_inter_quant_mat"); | ||
437 : | edgomez | 195 | |
438 : | Isibaar | 4 | bs_get_matrix(bs, matrix); |
439 : | set_inter_matrix(matrix); | ||
440 : | edgomez | 195 | } else |
441 : | Isibaar | 20 | set_inter_matrix(get_default_inter_matrix()); |
442 : | Isibaar | 3 | |
443 : | edgomez | 195 | if (dec->shape == VIDOBJLAY_SHAPE_GRAYSCALE) { |
444 : | suxen_drol | 252 | DPRINTF(DPRINTF_ERROR, "greyscale matrix not supported"); |
445 : | Isibaar | 3 | return -1; |
446 : | } | ||
447 : | Isibaar | 4 | |
448 : | Isibaar | 3 | } |
449 : | |||
450 : | edgomez | 195 | |
451 : | if (vol_ver_id != 1) { | ||
452 : | Isibaar | 333 | DEBUG("QUARTERPEL BITSTREAM"); |
453 : | dec->quarterpel = BitstreamGetBit(bs); // quarter_sample | ||
454 : | Isibaar | 3 | } |
455 : | Isibaar | 333 | else |
456 : | dec->quarterpel = 0; | ||
457 : | |||
458 : | Isibaar | 3 | |
459 : | edgomez | 195 | if (!BitstreamGetBit(bs)) // complexity_estimation_disable |
460 : | Isibaar | 3 | { |
461 : | suxen_drol | 252 | DPRINTF(DPRINTF_ERROR, "complexity_estimation not supported"); |
462 : | Isibaar | 3 | return -1; |
463 : | } | ||
464 : | |||
465 : | suxen_drol | 252 | BitstreamSkip(bs, 1); // resync_marker_disable |
466 : | Isibaar | 3 | |
467 : | edgomez | 195 | if (BitstreamGetBit(bs)) // data_partitioned |
468 : | Isibaar | 3 | { |
469 : | suxen_drol | 252 | DPRINTF(DPRINTF_ERROR, "data_partitioned not supported"); |
470 : | edgomez | 195 | BitstreamSkip(bs, 1); // reversible_vlc |
471 : | Isibaar | 3 | } |
472 : | |||
473 : | edgomez | 195 | if (vol_ver_id != 1) { |
474 : | if (BitstreamGetBit(bs)) // newpred_enable | ||
475 : | Isibaar | 3 | { |
476 : | suxen_drol | 252 | DPRINTF(DPRINTF_HEADER, "+ newpred_enable"); |
477 : | edgomez | 195 | BitstreamSkip(bs, 2); // requested_upstream_message_type |
478 : | BitstreamSkip(bs, 1); // newpred_segment_type | ||
479 : | Isibaar | 3 | } |
480 : | edgomez | 195 | if (BitstreamGetBit(bs)) // reduced_resolution_vop_enable |
481 : | Isibaar | 3 | { |
482 : | suxen_drol | 252 | DPRINTF(DPRINTF_ERROR, "reduced_resolution_vop not supported"); |
483 : | Isibaar | 3 | return -1; |
484 : | } | ||
485 : | } | ||
486 : | edgomez | 195 | |
487 : | if ((dec->scalability = BitstreamGetBit(bs))) // scalability | ||
488 : | Isibaar | 3 | { |
489 : | suxen_drol | 252 | DPRINTF(DPRINTF_ERROR, "scalability not supported"); |
490 : | Isibaar | 3 | return -1; |
491 : | } | ||
492 : | edgomez | 195 | } else // dec->shape == BINARY_ONLY |
493 : | Isibaar | 3 | { |
494 : | edgomez | 195 | if (vol_ver_id != 1) { |
495 : | Isibaar | 3 | if (BitstreamGetBit(bs)) // scalability |
496 : | { | ||
497 : | suxen_drol | 252 | DPRINTF(DPRINTF_ERROR, "scalability not supported"); |
498 : | Isibaar | 3 | return -1; |
499 : | } | ||
500 : | } | ||
501 : | edgomez | 195 | BitstreamSkip(bs, 1); // resync_marker_disable |
502 : | Isibaar | 3 | |
503 : | } | ||
504 : | |||
505 : | edgomez | 195 | } else if (start_code == GRPOFVOP_START_CODE) { |
506 : | suxen_drol | 252 | |
507 : | DPRINTF(DPRINTF_STARTCODE, "<group_of_vop>"); | ||
508 : | |||
509 : | Isibaar | 3 | BitstreamSkip(bs, 32); |
510 : | { | ||
511 : | int hours, minutes, seconds; | ||
512 : | edgomez | 195 | |
513 : | Isibaar | 3 | hours = BitstreamGetBits(bs, 5); |
514 : | minutes = BitstreamGetBits(bs, 6); | ||
515 : | READ_MARKER(); | ||
516 : | seconds = BitstreamGetBits(bs, 6); | ||
517 : | suxen_drol | 252 | |
518 : | DPRINTF(DPRINTF_HEADER, "time %ih%im%is", hours); | ||
519 : | Isibaar | 3 | } |
520 : | edgomez | 195 | BitstreamSkip(bs, 1); // closed_gov |
521 : | BitstreamSkip(bs, 1); // broken_link | ||
522 : | suxen_drol | 252 | |
523 : | edgomez | 195 | } else if (start_code == VOP_START_CODE) { |
524 : | suxen_drol | 252 | |
525 : | DPRINTF(DPRINTF_STARTCODE, "<vop>"); | ||
526 : | |||
527 : | edgomez | 195 | BitstreamSkip(bs, 32); // vop_start_code |
528 : | Isibaar | 3 | |
529 : | edgomez | 195 | coding_type = BitstreamGetBits(bs, 2); // vop_coding_type |
530 : | suxen_drol | 252 | DPRINTF(DPRINTF_HEADER, "coding_type %i", coding_type); |
531 : | Isibaar | 3 | |
532 : | chenm001 | 156 | // *************************** for decode B-frame time *********************** |
533 : | edgomez | 195 | while (BitstreamGetBit(bs) != 0) // time_base |
534 : | chenm001 | 156 | time_incr++; |
535 : | edgomez | 195 | |
536 : | Isibaar | 3 | READ_MARKER(); |
537 : | edgomez | 195 | |
538 : | if (dec->time_inc_bits) { | ||
539 : | chenm001 | 156 | time_increment = (BitstreamGetBits(bs, dec->time_inc_bits)); // vop_time_increment |
540 : | Isibaar | 3 | } |
541 : | suxen_drol | 240 | |
542 : | suxen_drol | 252 | DPRINTF(DPRINTF_HEADER, "time_base %i", time_incr); |
543 : | DPRINTF(DPRINTF_HEADER, "time_increment %i", time_increment); | ||
544 : | |||
545 : | DPRINTF(DPRINTF_TIMECODE, "%c %i:%i", | ||
546 : | suxen_drol | 240 | coding_type == I_VOP ? 'I' : coding_type == P_VOP ? 'P' : 'B', |
547 : | time_incr, time_increment); | ||
548 : | |||
549 : | edgomez | 195 | if (coding_type != B_VOP) { |
550 : | dec->last_time_base = dec->time_base; | ||
551 : | chenm001 | 156 | dec->time_base += time_incr; |
552 : | chl | 316 | dec->time = time_increment; |
553 : | |||
554 : | /* dec->time_base * time_increment_resolution + | ||
555 : | edgomez | 195 | time_increment; |
556 : | chl | 316 | */ dec->time_pp = (uint32_t) |
557 : | chl | 313 | (time_increment_resolution + dec->time - dec->last_non_b_time)%time_increment_resolution; |
558 : | edgomez | 195 | dec->last_non_b_time = dec->time; |
559 : | } else { | ||
560 : | chl | 316 | dec->time = time_increment; |
561 : | /* | ||
562 : | edgomez | 195 | (dec->last_time_base + |
563 : | chl | 316 | time_incr) * time_increment_resolution + time_increment; |
564 : | */ | ||
565 : | chl | 313 | dec->time_bp = (uint32_t) |
566 : | (time_increment_resolution + dec->last_non_b_time - dec->time)%time_increment_resolution; | ||
567 : | chenm001 | 156 | } |
568 : | Isibaar | 3 | |
569 : | READ_MARKER(); | ||
570 : | |||
571 : | edgomez | 195 | if (!BitstreamGetBit(bs)) // vop_coded |
572 : | Isibaar | 3 | { |
573 : | suxen_drol | 252 | DPRINTF(DPRINTF_HEADER, "vop_coded==false"); |
574 : | Isibaar | 3 | return N_VOP; |
575 : | } | ||
576 : | |||
577 : | /* if (newpred_enable) | ||
578 : | edgomez | 195 | { |
579 : | } | ||
580 : | */ | ||
581 : | Isibaar | 3 | |
582 : | chenm001 | 156 | // fix a little bug by MinChen <chenm002@163.com> |
583 : | edgomez | 195 | if ((dec->shape != VIDOBJLAY_SHAPE_BINARY_ONLY) && |
584 : | chl | 619 | ( (coding_type == P_VOP) || (coding_type == S_VOP) ) ) { |
585 : | Isibaar | 3 | *rounding = BitstreamGetBit(bs); // rounding_type |
586 : | suxen_drol | 252 | DPRINTF(DPRINTF_HEADER, "rounding %i", *rounding); |
587 : | Isibaar | 3 | } |
588 : | |||
589 : | /* if (reduced_resolution_enable) | ||
590 : | edgomez | 195 | { |
591 : | } | ||
592 : | */ | ||
593 : | Isibaar | 3 | |
594 : | edgomez | 195 | if (dec->shape != VIDOBJLAY_SHAPE_RECTANGULAR) { |
595 : | Isibaar | 3 | uint32_t width, height; |
596 : | uint32_t horiz_mc_ref, vert_mc_ref; | ||
597 : | edgomez | 195 | |
598 : | Isibaar | 3 | width = BitstreamGetBits(bs, 13); |
599 : | READ_MARKER(); | ||
600 : | height = BitstreamGetBits(bs, 13); | ||
601 : | READ_MARKER(); | ||
602 : | horiz_mc_ref = BitstreamGetBits(bs, 13); | ||
603 : | READ_MARKER(); | ||
604 : | vert_mc_ref = BitstreamGetBits(bs, 13); | ||
605 : | READ_MARKER(); | ||
606 : | |||
607 : | suxen_drol | 252 | DPRINTF(DPRINTF_HEADER, "width %i", width); |
608 : | DPRINTF(DPRINTF_HEADER, "height %i", height); | ||
609 : | DPRINTF(DPRINTF_HEADER, "horiz_mc_ref %i", horiz_mc_ref); | ||
610 : | DPRINTF(DPRINTF_HEADER, "vert_mc_ref %i", vert_mc_ref); | ||
611 : | Isibaar | 3 | |
612 : | edgomez | 195 | BitstreamSkip(bs, 1); // change_conv_ratio_disable |
613 : | if (BitstreamGetBit(bs)) // vop_constant_alpha | ||
614 : | Isibaar | 3 | { |
615 : | edgomez | 195 | BitstreamSkip(bs, 8); // vop_constant_alpha_value |
616 : | Isibaar | 3 | } |
617 : | } | ||
618 : | |||
619 : | edgomez | 195 | |
620 : | if (dec->shape != VIDOBJLAY_SHAPE_BINARY_ONLY) { | ||
621 : | Isibaar | 3 | // intra_dc_vlc_threshold |
622 : | edgomez | 195 | *intra_dc_threshold = |
623 : | intra_dc_threshold_table[BitstreamGetBits(bs, 3)]; | ||
624 : | Isibaar | 3 | |
625 : | h | 543 | dec->top_field_first = 0; |
626 : | dec->alternate_vertical_scan = 0; | ||
627 : | |||
628 : | edgomez | 195 | if (dec->interlacing) { |
629 : | suxen_drol | 252 | dec->top_field_first = BitstreamGetBit(bs); |
630 : | DPRINTF(DPRINTF_HEADER, "interlace top_field_first %i", dec->top_field_first); | ||
631 : | dec->alternate_vertical_scan = BitstreamGetBit(bs); | ||
632 : | DPRINTF(DPRINTF_HEADER, "interlace alternate_vertical_scan %i", dec->alternate_vertical_scan); | ||
633 : | |||
634 : | h | 69 | } |
635 : | Isibaar | 3 | } |
636 : | edgomez | 195 | |
637 : | if ((*quant = BitstreamGetBits(bs, dec->quant_bits)) < 1) // vop_quant | ||
638 : | Isibaar | 157 | *quant = 1; |
639 : | |||
640 : | suxen_drol | 252 | DPRINTF(DPRINTF_HEADER, "quant %i", *quant); |
641 : | edgomez | 195 | |
642 : | if (coding_type != I_VOP) { | ||
643 : | *fcode_forward = BitstreamGetBits(bs, 3); // fcode_forward | ||
644 : | suxen_drol | 252 | DPRINTF(DPRINTF_HEADER, "fcode_forward %i", *fcode_forward); |
645 : | Isibaar | 3 | } |
646 : | edgomez | 195 | |
647 : | if (coding_type == B_VOP) { | ||
648 : | *fcode_backward = BitstreamGetBits(bs, 3); // fcode_backward | ||
649 : | suxen_drol | 252 | DPRINTF(DPRINTF_HEADER, "fcode_backward %i", *fcode_backward); |
650 : | Isibaar | 3 | } |
651 : | edgomez | 195 | if (!dec->scalability) { |
652 : | if ((dec->shape != VIDOBJLAY_SHAPE_RECTANGULAR) && | ||
653 : | (coding_type != I_VOP)) { | ||
654 : | BitstreamSkip(bs, 1); // vop_shape_coding_type | ||
655 : | chenm001 | 156 | } |
656 : | } | ||
657 : | Isibaar | 3 | return coding_type; |
658 : | suxen_drol | 252 | |
659 : | edgomez | 195 | } else if (start_code == USERDATA_START_CODE) { |
660 : | suxen_drol | 252 | |
661 : | DPRINTF(DPRINTF_STARTCODE, "<user_data>"); | ||
662 : | |||
663 : | edgomez | 195 | BitstreamSkip(bs, 32); // user_data_start_code |
664 : | suxen_drol | 252 | |
665 : | edgomez | 195 | } else // start_code == ? |
666 : | Isibaar | 3 | { |
667 : | edgomez | 195 | if (BitstreamShowBits(bs, 24) == 0x000001) { |
668 : | suxen_drol | 252 | DPRINTF(DPRINTF_STARTCODE, "<unknown: %x>", BitstreamShowBits(bs, 32)); |
669 : | Isibaar | 3 | } |
670 : | BitstreamSkip(bs, 8); | ||
671 : | } | ||
672 : | } | ||
673 : | while ((BitstreamPos(bs) >> 3) < bs->length); | ||
674 : | |||
675 : | suxen_drol | 233 | //DPRINTF("*** WARNING: no vop_start_code found"); |
676 : | edgomez | 195 | return -1; /* ignore it */ |
677 : | Isibaar | 3 | } |
678 : | |||
679 : | |||
680 : | /* write custom quant matrix */ | ||
681 : | |||
682 : | edgomez | 195 | static void |
683 : | bs_put_matrix(Bitstream * bs, | ||
684 : | const int16_t * matrix) | ||
685 : | Isibaar | 3 | { |
686 : | int i, j; | ||
687 : | const int last = matrix[scan_tables[0][63]]; | ||
688 : | |||
689 : | suxen_drol | 233 | for (j = 63; j > 0 && matrix[scan_tables[0][j - 1]] == last; j--); |
690 : | Isibaar | 3 | |
691 : | edgomez | 195 | for (i = 0; i <= j; i++) { |
692 : | Isibaar | 3 | BitstreamPutBits(bs, matrix[scan_tables[0][i]], 8); |
693 : | } | ||
694 : | |||
695 : | edgomez | 195 | if (j < 63) { |
696 : | Isibaar | 3 | BitstreamPutBits(bs, 0, 8); |
697 : | } | ||
698 : | } | ||
699 : | |||
700 : | |||
701 : | /* | ||
702 : | write vol header | ||
703 : | */ | ||
704 : | edgomez | 195 | void |
705 : | BitstreamWriteVolHeader(Bitstream * const bs, | ||
706 : | const MBParam * pParam, | ||
707 : | chl | 619 | const FRAMEINFO * const frame) |
708 : | Isibaar | 3 | { |
709 : | chl | 619 | int vol_ver_id=1; |
710 : | |||
711 : | if ( (pParam->m_quarterpel) || (frame->global_flags & XVID_GMC) ) | ||
712 : | vol_ver_id = 2; | ||
713 : | |||
714 : | Isibaar | 3 | // video object_start_code & vo_id |
715 : | edgomez | 195 | BitstreamPad(bs); |
716 : | Isibaar | 3 | BitstreamPutBits(bs, VO_START_CODE, 27); |
717 : | edgomez | 195 | BitstreamPutBits(bs, 0, 5); |
718 : | Isibaar | 3 | |
719 : | // video_object_layer_start_code & vol_id | ||
720 : | BitstreamPutBits(bs, VOL_START_CODE, 28); | ||
721 : | BitstreamPutBits(bs, 0, 4); | ||
722 : | |||
723 : | edgomez | 195 | BitstreamPutBit(bs, 0); // random_accessible_vol |
724 : | BitstreamPutBits(bs, 0, 8); // video_object_type_indication | ||
725 : | Isibaar | 579 | |
726 : | chl | 619 | if (vol_ver_id == 1) |
727 : | Isibaar | 579 | { |
728 : | BitstreamPutBit(bs, 0); // is_object_layer_identified (0=not given) | ||
729 : | } | ||
730 : | else | ||
731 : | { | ||
732 : | BitstreamPutBit(bs, 1); // is_object_layer_identified | ||
733 : | chl | 619 | BitstreamPutBits(bs, vol_ver_id, 4); // vol_ver_id == 2 |
734 : | BitstreamPutBits(bs, 4, 3); // vol_ver_priority (1==lowest, 7==highest) ?? | ||
735 : | Isibaar | 579 | } |
736 : | |||
737 : | edgomez | 195 | BitstreamPutBits(bs, 1, 4); // aspect_ratio_info (1=1:1) |
738 : | suxen_drol | 164 | |
739 : | chl | 387 | BitstreamPutBit(bs, 1); // vol_control_parameters |
740 : | BitstreamPutBits(bs, 1, 2); // chroma_format 1="4:2:0" | ||
741 : | |||
742 : | edgomez | 195 | if (pParam->max_bframes > 0) { |
743 : | BitstreamPutBit(bs, 0); // low_delay | ||
744 : | } else | ||
745 : | suxen_drol | 164 | { |
746 : | chl | 386 | BitstreamPutBit(bs, 1); // low_delay |
747 : | suxen_drol | 164 | } |
748 : | chl | 387 | BitstreamPutBit(bs, 0); // vbv_parameters (0=not given) |
749 : | suxen_drol | 164 | |
750 : | edgomez | 195 | BitstreamPutBits(bs, 0, 2); // video_object_layer_shape (0=rectangular) |
751 : | Isibaar | 3 | |
752 : | WRITE_MARKER(); | ||
753 : | edgomez | 195 | |
754 : | Isibaar | 3 | /* time_increment_resolution; ignored by current decore versions |
755 : | edgomez | 195 | eg. 2fps res=2 inc=1 |
756 : | 25fps res=25 inc=1 | ||
757 : | 29.97fps res=30000 inc=1001 | ||
758 : | */ | ||
759 : | suxen_drol | 163 | BitstreamPutBits(bs, pParam->fbase, 16); |
760 : | Isibaar | 3 | |
761 : | WRITE_MARKER(); | ||
762 : | |||
763 : | suxen_drol | 241 | BitstreamPutBit(bs, 1); // fixed_vop_rate = 1 |
764 : | BitstreamPutBits(bs, pParam->fincr, log2bin(pParam->fbase)); // fixed_vop_time_increment | ||
765 : | Isibaar | 3 | |
766 : | WRITE_MARKER(); | ||
767 : | edgomez | 195 | BitstreamPutBits(bs, pParam->width, 13); // width |
768 : | Isibaar | 3 | WRITE_MARKER(); |
769 : | edgomez | 195 | BitstreamPutBits(bs, pParam->height, 13); // height |
770 : | Isibaar | 3 | WRITE_MARKER(); |
771 : | edgomez | 195 | |
772 : | BitstreamPutBit(bs, frame->global_flags & XVID_INTERLACING); // interlace | ||
773 : | Isibaar | 3 | BitstreamPutBit(bs, 1); // obmc_disable (overlapped block motion compensation) |
774 : | Isibaar | 579 | |
775 : | chl | 619 | if (vol_ver_id != 1) |
776 : | { if (frame->global_flags & XVID_GMC) | ||
777 : | { BitstreamPutBits(bs, 2, 2); // sprite_enable=='GMC' | ||
778 : | BitstreamPutBits(bs, 2, 6); // no_of_sprite_warping_points | ||
779 : | BitstreamPutBits(bs, 3, 2); // sprite_warping_accuracy 0==1/2, 1=1/4, 2=1/8, 3=1/16 | ||
780 : | BitstreamPutBit(bs, 0); // sprite_brightness_change (not supported) | ||
781 : | |||
782 : | /* currently we use no_of_sprite_warping_points==2, sprite_warping_accuracy==3 | ||
783 : | for DivX5 compatability */ | ||
784 : | |||
785 : | } else | ||
786 : | BitstreamPutBits(bs, 0, 2); // sprite_enable==off | ||
787 : | Isibaar | 579 | } |
788 : | else | ||
789 : | chl | 619 | BitstreamPutBit(bs, 0); // sprite_enable==off |
790 : | Isibaar | 579 | |
791 : | chl | 619 | BitstreamPutBit(bs, 0); // not_8_bit |
792 : | Isibaar | 3 | |
793 : | // quant_type 0=h.263 1=mpeg4(quantizer tables) | ||
794 : | suxen_drol | 136 | BitstreamPutBit(bs, pParam->m_quant_type); |
795 : | edgomez | 195 | |
796 : | if (pParam->m_quant_type) { | ||
797 : | Isibaar | 4 | BitstreamPutBit(bs, get_intra_matrix_status()); // load_intra_quant_mat |
798 : | edgomez | 195 | if (get_intra_matrix_status()) { |
799 : | Isibaar | 4 | bs_put_matrix(bs, get_intra_matrix()); |
800 : | Isibaar | 3 | } |
801 : | |||
802 : | edgomez | 195 | BitstreamPutBit(bs, get_inter_matrix_status()); // load_inter_quant_mat |
803 : | if (get_inter_matrix_status()) { | ||
804 : | Isibaar | 4 | bs_put_matrix(bs, get_inter_matrix()); |
805 : | Isibaar | 3 | } |
806 : | |||
807 : | } | ||
808 : | |||
809 : | chl | 619 | if (vol_ver_id != 1) { |
810 : | if (pParam->m_quarterpel) | ||
811 : | BitstreamPutBit(bs, 1); // quarterpel | ||
812 : | else | ||
813 : | BitstreamPutBit(bs, 0); // no quarterpel | ||
814 : | Isibaar | 579 | } |
815 : | |||
816 : | Isibaar | 3 | BitstreamPutBit(bs, 1); // complexity_estimation_disable |
817 : | BitstreamPutBit(bs, 1); // resync_marker_disable | ||
818 : | BitstreamPutBit(bs, 0); // data_partitioned | ||
819 : | Isibaar | 579 | |
820 : | chl | 619 | if (vol_ver_id != 1) |
821 : | Isibaar | 579 | { |
822 : | BitstreamPutBit(bs, 0); // newpred_enable | ||
823 : | BitstreamPutBit(bs, 0); // reduced_resolution_vop_enabled | ||
824 : | } | ||
825 : | chl | 619 | |
826 : | BitstreamPutBit(bs, 0); // scalability | ||
827 : | Isibaar | 579 | |
828 : | Isibaar | 3 | } |
829 : | |||
830 : | |||
831 : | /* | ||
832 : | write vop header | ||
833 : | */ | ||
834 : | edgomez | 195 | void |
835 : | BitstreamWriteVopHeader(Bitstream * const bs, | ||
836 : | const MBParam * pParam, | ||
837 : | chl | 619 | const FRAMEINFO * const frame, |
838 : | suxen_drol | 229 | int vop_coded) |
839 : | Isibaar | 3 | { |
840 : | suxen_drol | 152 | uint32_t i; |
841 : | chl | 387 | |
842 : | edgomez | 195 | BitstreamPad(bs); |
843 : | BitstreamPutBits(bs, VOP_START_CODE, 32); | ||
844 : | Isibaar | 3 | |
845 : | edgomez | 195 | BitstreamPutBits(bs, frame->coding_type, 2); |
846 : | |||
847 : | for (i = 0; i < frame->seconds; i++) { | ||
848 : | suxen_drol | 152 | BitstreamPutBit(bs, 1); |
849 : | } | ||
850 : | BitstreamPutBit(bs, 0); | ||
851 : | Isibaar | 3 | |
852 : | WRITE_MARKER(); | ||
853 : | |||
854 : | // time_increment: value=nth_of_sec, nbits = log2(resolution) | ||
855 : | chl | 619 | |
856 : | edgomez | 195 | BitstreamPutBits(bs, frame->ticks, log2bin(pParam->fbase)); |
857 : | suxen_drol | 252 | /*DPRINTF("[%i:%i] %c\n", frame->seconds, frame->ticks, |
858 : | edgomez | 195 | frame->coding_type == I_VOP ? 'I' : frame->coding_type == |
859 : | suxen_drol | 252 | P_VOP ? 'P' : 'B');*/ |
860 : | Isibaar | 3 | |
861 : | WRITE_MARKER(); | ||
862 : | |||
863 : | suxen_drol | 229 | if (!vop_coded) { |
864 : | BitstreamPutBits(bs, 0, 1); | ||
865 : | return; | ||
866 : | } | ||
867 : | |||
868 : | edgomez | 195 | BitstreamPutBits(bs, 1, 1); // vop_coded |
869 : | Isibaar | 3 | |
870 : | chl | 619 | if ( (frame->coding_type == P_VOP) || (frame->coding_type == S_VOP) ) |
871 : | suxen_drol | 136 | BitstreamPutBits(bs, frame->rounding_type, 1); |
872 : | Isibaar | 3 | |
873 : | edgomez | 195 | BitstreamPutBits(bs, 0, 3); // intra_dc_vlc_threshold |
874 : | |||
875 : | if (frame->global_flags & XVID_INTERLACING) { | ||
876 : | h | 543 | BitstreamPutBit(bs, (frame->global_flags & XVID_TOPFIELDFIRST)); |
877 : | BitstreamPutBit(bs, (frame->global_flags & XVID_ALTERNATESCAN)); | ||
878 : | h | 69 | } |
879 : | chl | 619 | |
880 : | if (frame->coding_type == S_VOP) { | ||
881 : | if (1) { // no_of_sprite_warping_points>=1 | ||
882 : | if (pParam->m_quarterpel) | ||
883 : | bs_put_spritetrajectory(bs, frame->GMC_MV.x/2 ); // du[0] | ||
884 : | else | ||
885 : | bs_put_spritetrajectory(bs, frame->GMC_MV.x ); // du[0] | ||
886 : | WRITE_MARKER(); | ||
887 : | |||
888 : | if (pParam->m_quarterpel) | ||
889 : | bs_put_spritetrajectory(bs, frame->GMC_MV.y/2 ); // dv[0] | ||
890 : | else | ||
891 : | bs_put_spritetrajectory(bs, frame->GMC_MV.y ); // dv[0] | ||
892 : | WRITE_MARKER(); | ||
893 : | } | ||
894 : | /* GMC is halfpel in bitstream, even though GMC_MV was pseudo-qpel (2*halfpel) */ | ||
895 : | h | 69 | |
896 : | chl | 619 | if (2) { // no_of_sprite_warping_points>=2 (for DivX5 compat) |
897 : | bs_put_spritetrajectory(bs, 0 ); | ||
898 : | WRITE_MARKER(); | ||
899 : | bs_put_spritetrajectory(bs, 0 ); | ||
900 : | WRITE_MARKER(); | ||
901 : | } | ||
902 : | // no support for brightness_change! | ||
903 : | } | ||
904 : | |||
905 : | edgomez | 195 | BitstreamPutBits(bs, frame->quant, 5); // quantizer |
906 : | |||
907 : | suxen_drol | 136 | if (frame->coding_type != I_VOP) |
908 : | edgomez | 195 | BitstreamPutBits(bs, frame->fcode, 3); // forward_fixed_code |
909 : | suxen_drol | 152 | |
910 : | if (frame->coding_type == B_VOP) | ||
911 : | edgomez | 195 | BitstreamPutBits(bs, frame->bcode, 3); // backward_fixed_code |
912 : | suxen_drol | 152 | |
913 : | Isibaar | 3 | } |
914 : | suxen_drol | 229 | |
915 : | void | ||
916 : | BitstreamWriteUserData(Bitstream * const bs, | ||
917 : | uint8_t * data, | ||
918 : | const int length) | ||
919 : | { | ||
920 : | int i; | ||
921 : | |||
922 : | BitstreamPad(bs); | ||
923 : | BitstreamPutBits(bs, USERDATA_START_CODE, 32); | ||
924 : | |||
925 : | for (i = 0; i < length; i++) { | ||
926 : | BitstreamPutBits(bs, data[i], 8); | ||
927 : | } | ||
928 : | |||
929 : | chl | 313 | } |
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