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Revision 1.25.2.3 - (view) (download)
1 : | suxen_drol | 1.11 | /****************************************************************************** |
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 : | Isibaar | 1.15 | * mbcoding.c * |
33 : | suxen_drol | 1.11 | * * |
34 : | Isibaar | 1.15 | * Copyright (C) 2002 - Michael Militzer <isibaar@xvid.org> * |
35 : | suxen_drol | 1.11 | * * |
36 : | * For more information visit the XviD homepage: http://www.xvid.org * | ||
37 : | * * | ||
38 : | ******************************************************************************/ | ||
39 : | |||
40 : | /****************************************************************************** | ||
41 : | * * | ||
42 : | * Revision history: * | ||
43 : | * * | ||
44 : | chl | 1.25.2.3 | * 28.10.2002 GMC support - gruel * |
45 : | suxen_drol | 1.19 | * 28.06.2002 added check_resync_marker() * |
46 : | Isibaar | 1.15 | * 14.04.2002 bframe encoding * |
47 : | suxen_drol | 1.11 | * 08.03.2002 initial version; isibaar * |
48 : | * * | ||
49 : | ******************************************************************************/ | ||
50 : | |||
51 : | |||
52 : | |||
53 : | Isibaar | 1.8 | #include <stdlib.h> |
54 : | Isibaar | 1.1 | #include "../portab.h" |
55 : | #include "bitstream.h" | ||
56 : | #include "zigzag.h" | ||
57 : | #include "vlc_codes.h" | ||
58 : | Isibaar | 1.8 | #include "mbcoding.h" |
59 : | Isibaar | 1.1 | |
60 : | #include "../utils/mbfunctions.h" | ||
61 : | |||
62 : | #define ABS(X) (((X)>0)?(X):-(X)) | ||
63 : | #define CLIP(X,A) (X > A) ? (A) : (X) | ||
64 : | |||
65 : | edgomez | 1.17 | VLC intra_table[524032]; |
66 : | Isibaar | 1.15 | VLC inter_table[524032]; |
67 : | Isibaar | 1.9 | |
68 : | Isibaar | 1.8 | VLC DCT3Dintra[4096]; |
69 : | VLC DCT3Dinter[4096]; | ||
70 : | Isibaar | 1.1 | |
71 : | chl | 1.25.2.3 | /* not really MB related, but VLCs are only available here */ |
72 : | void inline bs_put_spritetrajectory(Bitstream * bs, | ||
73 : | const int val) | ||
74 : | { | ||
75 : | const int code = sprite_trajectory_code[val+16384].code; | ||
76 : | const int len = sprite_trajectory_code[val+16384].len; | ||
77 : | const int code2 = sprite_trajectory_len[len].code; | ||
78 : | const int len2 = sprite_trajectory_len[len].len; | ||
79 : | |||
80 : | // printf("GMC=%d Code/Len = %d / %d ",val, code,len); | ||
81 : | // printf("Code2 / Len2 = %d / %d \n",code2,len2); | ||
82 : | |||
83 : | BitstreamPutBits(bs, code2, len2); | ||
84 : | if (len) BitstreamPutBits(bs, code, len); | ||
85 : | } | ||
86 : | |||
87 : | |||
88 : | edgomez | 1.17 | void |
89 : | init_vlc_tables(void) | ||
90 : | Isibaar | 1.1 | { |
91 : | edgomez | 1.7 | |
92 : | Isibaar | 1.1 | int32_t k, l, i, intra, last; |
93 : | VLC *vlc[2]; | ||
94 : | VLC **coeff_ptr; | ||
95 : | VLC *vlc1, *vlc2; | ||
96 : | |||
97 : | vlc1 = DCT3Dintra; | ||
98 : | vlc2 = DCT3Dinter; | ||
99 : | edgomez | 1.17 | |
100 : | Isibaar | 1.8 | vlc[0] = intra_table; |
101 : | vlc[1] = inter_table; | ||
102 : | edgomez | 1.17 | |
103 : | Isibaar | 1.8 | // generate encoding vlc lookup tables |
104 : | Isibaar | 1.15 | // the lookup table idea is taken from the excellent fame project by Vivien Chapellier |
105 : | edgomez | 1.17 | for (i = 0; i < 4; i++) { |
106 : | Isibaar | 1.1 | intra = i % 2; |
107 : | Isibaar | 1.8 | last = i / 2; |
108 : | Isibaar | 1.1 | |
109 : | Isibaar | 1.8 | coeff_ptr = coeff_vlc[last + 2 * intra]; |
110 : | edgomez | 1.17 | |
111 : | for (k = -2047; k < 2048; k++) { // level | ||
112 : | Isibaar | 1.8 | int8_t *max_level_ptr = max_level[last + 2 * intra]; |
113 : | int8_t *max_run_ptr = max_run[last + 2 * intra]; | ||
114 : | edgomez | 1.17 | |
115 : | for (l = 0; l < 64; l++) { // run | ||
116 : | Isibaar | 1.5 | int32_t level = k; |
117 : | Isibaar | 1.18 | ptr_t run = l; |
118 : | edgomez | 1.17 | |
119 : | if ((abs(level) <= max_level_ptr[run]) && (run <= (uint32_t) max_run_ptr[abs(level)])) { // level < max_level and run < max_run | ||
120 : | |||
121 : | vlc[intra]->code = 0; | ||
122 : | vlc[intra]->len = 0; | ||
123 : | goto loop_end; | ||
124 : | } else { | ||
125 : | if (level > 0) // correct level | ||
126 : | Isibaar | 1.1 | level -= max_level_ptr[run]; |
127 : | else | ||
128 : | level += max_level_ptr[run]; | ||
129 : | Isibaar | 1.5 | |
130 : | edgomez | 1.17 | if ((abs(level) <= max_level_ptr[run]) && |
131 : | (run <= (uint32_t) max_run_ptr[abs(level)])) { | ||
132 : | |||
133 : | Isibaar | 1.8 | vlc[intra]->code = 0x06; |
134 : | vlc[intra]->len = 8; | ||
135 : | goto loop_end; | ||
136 : | } | ||
137 : | |||
138 : | edgomez | 1.17 | if (level > 0) // still here? |
139 : | level += max_level_ptr[run]; // restore level | ||
140 : | Isibaar | 1.8 | else |
141 : | level -= max_level_ptr[run]; | ||
142 : | |||
143 : | edgomez | 1.17 | run -= max_run_ptr[abs(level)] + 1; // and change run |
144 : | |||
145 : | if ((abs(level) <= max_level_ptr[run]) && | ||
146 : | (run <= (uint32_t) max_run_ptr[abs(level)])) { | ||
147 : | Isibaar | 1.8 | |
148 : | vlc[intra]->code = 0x0e; | ||
149 : | vlc[intra]->len = 9; | ||
150 : | goto loop_end; | ||
151 : | Isibaar | 1.1 | } |
152 : | Isibaar | 1.8 | run += max_run_ptr[abs(level)] + 1; |
153 : | Isibaar | 1.1 | } |
154 : | Isibaar | 1.8 | |
155 : | edgomez | 1.17 | vlc[intra]->code = |
156 : | (uint32_t) ((l << 14) | (0x1e + last) << 20) | (1 << 13) | | ||
157 : | ((k & 0xfff) << 1) | 1; | ||
158 : | Isibaar | 1.8 | |
159 : | vlc[intra]->len = 30; | ||
160 : | vlc[intra]++; | ||
161 : | continue; | ||
162 : | |||
163 : | edgomez | 1.17 | loop_end: |
164 : | if (level != 0) { | ||
165 : | vlc[intra]->code = | ||
166 : | (vlc[intra]-> | ||
167 : | code << (coeff_ptr[run][abs(level) - 1].len + | ||
168 : | 1)) | (coeff_ptr[run][abs(level) - | ||
169 : | 1].code << 1); | ||
170 : | vlc[intra]->len = | ||
171 : | (coeff_ptr[run][abs(level) - 1].len + 1) + | ||
172 : | vlc[intra]->len; | ||
173 : | Isibaar | 1.8 | |
174 : | edgomez | 1.17 | if (level < 0) |
175 : | Isibaar | 1.8 | vlc[intra]->code += 1; |
176 : | } | ||
177 : | |||
178 : | Isibaar | 1.1 | vlc[intra]++; |
179 : | } | ||
180 : | } | ||
181 : | } | ||
182 : | edgomez | 1.7 | |
183 : | edgomez | 1.17 | for (i = 0; i < 4096; i++) { |
184 : | if (i >= 512) { | ||
185 : | Isibaar | 1.1 | *vlc1 = DCT3Dtab3[(i >> 5) - 16]; |
186 : | *vlc2 = DCT3Dtab0[(i >> 5) - 16]; | ||
187 : | edgomez | 1.17 | } else if (i >= 128) { |
188 : | Isibaar | 1.1 | *vlc1 = DCT3Dtab4[(i >> 2) - 32]; |
189 : | *vlc2 = DCT3Dtab1[(i >> 2) - 32]; | ||
190 : | edgomez | 1.17 | } else if (i >= 8) { |
191 : | Isibaar | 1.1 | *vlc1 = DCT3Dtab5[i - 8]; |
192 : | *vlc2 = DCT3Dtab2[i - 8]; | ||
193 : | edgomez | 1.17 | } else { |
194 : | Isibaar | 1.1 | *vlc1 = ERRtab[i]; |
195 : | *vlc2 = ERRtab[i]; | ||
196 : | } | ||
197 : | |||
198 : | vlc1++; | ||
199 : | vlc2++; | ||
200 : | } | ||
201 : | DCT3D[0] = DCT3Dinter; | ||
202 : | DCT3D[1] = DCT3Dintra; | ||
203 : | |||
204 : | chl | 1.25.2.3 | |
205 : | /* init sprite_trajectory tables */ | ||
206 : | /* even if GMC is not specified (it might be used later...) */ | ||
207 : | |||
208 : | sprite_trajectory_code[0+16384].code = 0; | ||
209 : | sprite_trajectory_code[0+16384].len = 0; | ||
210 : | for (k=0;k<14;k++) | ||
211 : | { | ||
212 : | int limit = (1<<k); | ||
213 : | |||
214 : | for (i=-(2*limit-1); i<= -limit; i++) | ||
215 : | { | ||
216 : | sprite_trajectory_code[i+16384].code = (2*limit-1)+i; | ||
217 : | sprite_trajectory_code[i+16384].len = k+1; | ||
218 : | } | ||
219 : | |||
220 : | for (i=limit; i<= 2*limit-1; i++) | ||
221 : | { | ||
222 : | sprite_trajectory_code[i+16384].code = i; | ||
223 : | sprite_trajectory_code[i+16384].len = k+1; | ||
224 : | } | ||
225 : | } | ||
226 : | Isibaar | 1.1 | } |
227 : | |||
228 : | edgomez | 1.17 | static __inline void |
229 : | CodeVector(Bitstream * bs, | ||
230 : | int32_t value, | ||
231 : | int32_t f_code, | ||
232 : | Statistics * pStat) | ||
233 : | Isibaar | 1.1 | { |
234 : | edgomez | 1.7 | |
235 : | Isibaar | 1.1 | const int scale_factor = 1 << (f_code - 1); |
236 : | const int cmp = scale_factor << 5; | ||
237 : | |||
238 : | edgomez | 1.17 | if (value < (-1 * cmp)) |
239 : | Isibaar | 1.1 | value += 64 * scale_factor; |
240 : | edgomez | 1.17 | |
241 : | if (value > (cmp - 1)) | ||
242 : | Isibaar | 1.1 | value -= 64 * scale_factor; |
243 : | |||
244 : | edgomez | 1.7 | pStat->iMvSum += value * value; |
245 : | pStat->iMvCount++; | ||
246 : | Isibaar | 1.1 | |
247 : | edgomez | 1.7 | if (value == 0) { |
248 : | edgomez | 1.17 | BitstreamPutBits(bs, mb_motion_table[32].code, |
249 : | mb_motion_table[32].len); | ||
250 : | edgomez | 1.7 | } else { |
251 : | Isibaar | 1.1 | uint16_t length, code, mv_res, sign; |
252 : | edgomez | 1.17 | |
253 : | Isibaar | 1.1 | length = 16 << f_code; |
254 : | f_code--; | ||
255 : | edgomez | 1.17 | |
256 : | Isibaar | 1.1 | sign = (value < 0); |
257 : | |||
258 : | edgomez | 1.17 | if (value >= length) |
259 : | Isibaar | 1.1 | value -= 2 * length; |
260 : | edgomez | 1.17 | else if (value < -length) |
261 : | Isibaar | 1.1 | value += 2 * length; |
262 : | |||
263 : | edgomez | 1.17 | if (sign) |
264 : | Isibaar | 1.1 | value = -value; |
265 : | |||
266 : | value--; | ||
267 : | mv_res = value & ((1 << f_code) - 1); | ||
268 : | code = ((value - mv_res) >> f_code) + 1; | ||
269 : | |||
270 : | edgomez | 1.17 | if (sign) |
271 : | Isibaar | 1.1 | code = -code; |
272 : | |||
273 : | code += 32; | ||
274 : | edgomez | 1.17 | BitstreamPutBits(bs, mb_motion_table[code].code, |
275 : | mb_motion_table[code].len); | ||
276 : | |||
277 : | if (f_code) | ||
278 : | Isibaar | 1.1 | BitstreamPutBits(bs, mv_res, f_code); |
279 : | edgomez | 1.7 | } |
280 : | |||
281 : | Isibaar | 1.1 | } |
282 : | |||
283 : | |||
284 : | edgomez | 1.17 | static __inline void |
285 : | CodeCoeff(Bitstream * bs, | ||
286 : | const int16_t qcoeff[64], | ||
287 : | VLC * table, | ||
288 : | const uint16_t * zigzag, | ||
289 : | uint16_t intra) | ||
290 : | edgomez | 1.7 | { |
291 : | |||
292 : | Isibaar | 1.1 | uint32_t j, last; |
293 : | short v; | ||
294 : | VLC *vlc; | ||
295 : | edgomez | 1.17 | |
296 : | Isibaar | 1.1 | j = intra; |
297 : | Isibaar | 1.10 | last = intra; |
298 : | Isibaar | 1.1 | |
299 : | edgomez | 1.17 | while (j < 64 && (v = qcoeff[zigzag[j]]) == 0) |
300 : | j++; | ||
301 : | |||
302 : | Isibaar | 1.1 | do { |
303 : | Isibaar | 1.15 | vlc = table + 64 * 2047 + (v << 6) + j - last; |
304 : | last = ++j; | ||
305 : | |||
306 : | Isibaar | 1.1 | // count zeroes |
307 : | edgomez | 1.17 | while (j < 64 && (v = qcoeff[zigzag[j]]) == 0) |
308 : | j++; | ||
309 : | |||
310 : | Isibaar | 1.1 | // write code |
311 : | edgomez | 1.17 | if (j != 64) { |
312 : | Isibaar | 1.1 | BitstreamPutBits(bs, vlc->code, vlc->len); |
313 : | } else { | ||
314 : | Isibaar | 1.15 | vlc += 64 * 4095; |
315 : | Isibaar | 1.1 | BitstreamPutBits(bs, vlc->code, vlc->len); |
316 : | break; | ||
317 : | } | ||
318 : | edgomez | 1.17 | } while (1); |
319 : | edgomez | 1.7 | |
320 : | Isibaar | 1.1 | } |
321 : | |||
322 : | |||
323 : | chl | 1.25.2.1 | static __inline void |
324 : | chl | 1.25.2.3 | CodeBlockIntra(const FRAMEINFO * const frame, |
325 : | edgomez | 1.17 | const MACROBLOCK * pMB, |
326 : | int16_t qcoeff[6 * 64], | ||
327 : | edgomez | 1.7 | Bitstream * bs, |
328 : | Statistics * pStat) | ||
329 : | Isibaar | 1.1 | { |
330 : | edgomez | 1.7 | |
331 : | Isibaar | 1.1 | uint32_t i, mcbpc, cbpy, bits; |
332 : | |||
333 : | cbpy = pMB->cbp >> 2; | ||
334 : | |||
335 : | edgomez | 1.7 | // write mcbpc |
336 : | edgomez | 1.17 | if (frame->coding_type == I_VOP) { |
337 : | edgomez | 1.7 | mcbpc = ((pMB->mode >> 1) & 3) | ((pMB->cbp & 3) << 2); |
338 : | edgomez | 1.17 | BitstreamPutBits(bs, mcbpc_intra_tab[mcbpc].code, |
339 : | mcbpc_intra_tab[mcbpc].len); | ||
340 : | } else { | ||
341 : | edgomez | 1.7 | mcbpc = (pMB->mode & 7) | ((pMB->cbp & 3) << 3); |
342 : | edgomez | 1.17 | BitstreamPutBits(bs, mcbpc_inter_tab[mcbpc].code, |
343 : | mcbpc_inter_tab[mcbpc].len); | ||
344 : | Isibaar | 1.4 | } |
345 : | Isibaar | 1.1 | |
346 : | // ac prediction flag | ||
347 : | edgomez | 1.17 | if (pMB->acpred_directions[0]) |
348 : | edgomez | 1.7 | BitstreamPutBits(bs, 1, 1); |
349 : | Isibaar | 1.1 | else |
350 : | edgomez | 1.7 | BitstreamPutBits(bs, 0, 1); |
351 : | Isibaar | 1.1 | |
352 : | edgomez | 1.7 | // write cbpy |
353 : | edgomez | 1.17 | BitstreamPutBits(bs, cbpy_tab[cbpy].code, cbpy_tab[cbpy].len); |
354 : | Isibaar | 1.1 | |
355 : | // write dquant | ||
356 : | edgomez | 1.17 | if (pMB->mode == MODE_INTRA_Q) |
357 : | Isibaar | 1.1 | BitstreamPutBits(bs, pMB->dquant, 2); |
358 : | |||
359 : | h | 1.6 | // write interlacing |
360 : | edgomez | 1.17 | if (frame->global_flags & XVID_INTERLACING) { |
361 : | h | 1.6 | BitstreamPutBit(bs, pMB->field_dct); |
362 : | } | ||
363 : | Isibaar | 1.1 | // code block coeffs |
364 : | edgomez | 1.17 | for (i = 0; i < 6; i++) { |
365 : | if (i < 4) | ||
366 : | BitstreamPutBits(bs, dcy_tab[qcoeff[i * 64 + 0] + 255].code, | ||
367 : | dcy_tab[qcoeff[i * 64 + 0] + 255].len); | ||
368 : | Isibaar | 1.1 | else |
369 : | edgomez | 1.17 | BitstreamPutBits(bs, dcc_tab[qcoeff[i * 64 + 0] + 255].code, |
370 : | dcc_tab[qcoeff[i * 64 + 0] + 255].len); | ||
371 : | |||
372 : | if (pMB->cbp & (1 << (5 - i))) { | ||
373 : | h | 1.25.2.2 | const uint16_t *scan_table = |
374 : | frame->global_flags & XVID_ALTERNATESCAN ? | ||
375 : | scan_tables[2] : scan_tables[pMB->acpred_directions[i]]; | ||
376 : | |||
377 : | Isibaar | 1.1 | bits = BitstreamPos(bs); |
378 : | |||
379 : | h | 1.25.2.2 | CodeCoeff(bs, &qcoeff[i * 64], intra_table, scan_table, 1); |
380 : | Isibaar | 1.1 | |
381 : | bits = BitstreamPos(bs) - bits; | ||
382 : | pStat->iTextBits += bits; | ||
383 : | } | ||
384 : | } | ||
385 : | edgomez | 1.7 | |
386 : | Isibaar | 1.1 | } |
387 : | |||
388 : | |||
389 : | edgomez | 1.17 | static void |
390 : | chl | 1.25.2.3 | CodeBlockInter(const FRAMEINFO * const frame, |
391 : | edgomez | 1.17 | const MACROBLOCK * pMB, |
392 : | int16_t qcoeff[6 * 64], | ||
393 : | edgomez | 1.7 | Bitstream * bs, |
394 : | Statistics * pStat) | ||
395 : | Isibaar | 1.1 | { |
396 : | edgomez | 1.7 | |
397 : | Isibaar | 1.1 | int32_t i; |
398 : | uint32_t bits, mcbpc, cbpy; | ||
399 : | chl | 1.25.2.3 | int mcsel=0; |
400 : | Isibaar | 1.1 | |
401 : | edgomez | 1.7 | mcbpc = (pMB->mode & 7) | ((pMB->cbp & 3) << 3); |
402 : | Isibaar | 1.1 | cbpy = 15 - (pMB->cbp >> 2); |
403 : | |||
404 : | // write mcbpc | ||
405 : | edgomez | 1.17 | BitstreamPutBits(bs, mcbpc_inter_tab[mcbpc].code, |
406 : | mcbpc_inter_tab[mcbpc].len); | ||
407 : | Isibaar | 1.1 | |
408 : | chl | 1.25.2.3 | if ( (frame->coding_type == S_VOP) && (pMB->mode == MODE_INTER || pMB->mode == MODE_INTER_Q) ) |
409 : | { | ||
410 : | if (frame->quarterpel) { | ||
411 : | if ( (pMB->qmvs[0].x == frame->GMC_MV.x) && (pMB->qmvs[0].y == frame->GMC_MV.y) ) | ||
412 : | mcsel=1; | ||
413 : | } else { | ||
414 : | if ( (pMB->mvs[0].x == frame->GMC_MV.x) && (pMB->mvs[0].y == frame->GMC_MV.y) ) | ||
415 : | mcsel=1; | ||
416 : | } | ||
417 : | BitstreamPutBit(bs, mcsel); // mcsel: '0'=local motion, '1'=GMC | ||
418 : | } | ||
419 : | |||
420 : | Isibaar | 1.1 | // write cbpy |
421 : | BitstreamPutBits(bs, cbpy_tab[cbpy].code, cbpy_tab[cbpy].len); | ||
422 : | |||
423 : | // write dquant | ||
424 : | edgomez | 1.17 | if (pMB->mode == MODE_INTER_Q) |
425 : | Isibaar | 1.1 | BitstreamPutBits(bs, pMB->dquant, 2); |
426 : | edgomez | 1.17 | |
427 : | h | 1.6 | // interlacing |
428 : | edgomez | 1.17 | if (frame->global_flags & XVID_INTERLACING) { |
429 : | h | 1.25 | if (pMB->cbp) { |
430 : | BitstreamPutBit(bs, pMB->field_dct); | ||
431 : | DEBUG1("codep: field_dct: ", pMB->field_dct); | ||
432 : | } | ||
433 : | h | 1.6 | |
434 : | // if inter block, write field ME flag | ||
435 : | edgomez | 1.17 | if (pMB->mode == MODE_INTER || pMB->mode == MODE_INTER_Q) { |
436 : | h | 1.6 | BitstreamPutBit(bs, pMB->field_pred); |
437 : | DEBUG1("codep: field_pred: ", pMB->field_pred); | ||
438 : | |||
439 : | // write field prediction references | ||
440 : | edgomez | 1.17 | if (pMB->field_pred) { |
441 : | h | 1.6 | BitstreamPutBit(bs, pMB->field_for_top); |
442 : | BitstreamPutBit(bs, pMB->field_for_bot); | ||
443 : | } | ||
444 : | } | ||
445 : | } | ||
446 : | chl | 1.25.2.3 | // code motion vector(s) if motion is local |
447 : | if (mcsel==0) | ||
448 : | for (i = 0; i < (pMB->mode == MODE_INTER4V ? 4 : 1); i++) { | ||
449 : | CodeVector(bs, pMB->pmvs[i].x, frame->fcode, pStat); | ||
450 : | CodeVector(bs, pMB->pmvs[i].y, frame->fcode, pStat); | ||
451 : | } | ||
452 : | Isibaar | 1.1 | |
453 : | bits = BitstreamPos(bs); | ||
454 : | edgomez | 1.17 | |
455 : | Isibaar | 1.1 | // code block coeffs |
456 : | edgomez | 1.17 | for (i = 0; i < 6; i++) |
457 : | if (pMB->cbp & (1 << (5 - i))) | ||
458 : | h | 1.25.2.2 | { |
459 : | const uint16_t *scan_table = | ||
460 : | frame->global_flags & XVID_ALTERNATESCAN ? | ||
461 : | scan_tables[2] : scan_tables[0]; | ||
462 : | |||
463 : | CodeCoeff(bs, &qcoeff[i * 64], inter_table, scan_table, 0); | ||
464 : | } | ||
465 : | Isibaar | 1.1 | |
466 : | bits = BitstreamPos(bs) - bits; | ||
467 : | pStat->iTextBits += bits; | ||
468 : | } | ||
469 : | |||
470 : | |||
471 : | edgomez | 1.17 | void |
472 : | chl | 1.25.2.3 | MBCoding(const FRAMEINFO * const frame, |
473 : | edgomez | 1.17 | MACROBLOCK * pMB, |
474 : | int16_t qcoeff[6 * 64], | ||
475 : | Bitstream * bs, | ||
476 : | Statistics * pStat) | ||
477 : | Isibaar | 1.1 | { |
478 : | chl | 1.25.2.3 | if (frame->coding_type != I_VOP) |
479 : | BitstreamPutBit(bs, 0); // not_coded | ||
480 : | |||
481 : | chl | 1.22 | if (pMB->mode == MODE_INTRA || pMB->mode == MODE_INTRA_Q) |
482 : | suxen_drol | 1.13 | CodeBlockIntra(frame, pMB, qcoeff, bs, pStat); |
483 : | Isibaar | 1.1 | else |
484 : | suxen_drol | 1.13 | CodeBlockInter(frame, pMB, qcoeff, bs, pStat); |
485 : | edgomez | 1.7 | |
486 : | Isibaar | 1.1 | } |
487 : | chl | 1.24 | |
488 : | chl | 1.25.2.1 | /* |
489 : | // moved to mbcoding.h so that in can be 'static __inline' | ||
490 : | chl | 1.24 | void |
491 : | MBSkip(Bitstream * bs) | ||
492 : | { | ||
493 : | BitstreamPutBit(bs, 1); // not coded | ||
494 : | } | ||
495 : | chl | 1.25.2.1 | */ |
496 : | suxen_drol | 1.11 | |
497 : | /*************************************************************** | ||
498 : | * bframe encoding start | ||
499 : | ***************************************************************/ | ||
500 : | |||
501 : | /* | ||
502 : | mbtype | ||
503 : | 0 1b direct(h263) mvdb | ||
504 : | 1 01b interpolate mc+q dbquant, mvdf, mvdb | ||
505 : | 2 001b backward mc+q dbquant, mvdb | ||
506 : | 3 0001b forward mc+q dbquant, mvdf | ||
507 : | */ | ||
508 : | |||
509 : | chl | 1.25.2.1 | static __inline void |
510 : | edgomez | 1.17 | put_bvop_mbtype(Bitstream * bs, |
511 : | int value) | ||
512 : | { | ||
513 : | switch (value) { | ||
514 : | chl | 1.25.2.1 | case MODE_FORWARD: |
515 : | BitstreamPutBit(bs, 0); | ||
516 : | case MODE_BACKWARD: | ||
517 : | BitstreamPutBit(bs, 0); | ||
518 : | case MODE_INTERPOLATE: | ||
519 : | BitstreamPutBit(bs, 0); | ||
520 : | case MODE_DIRECT: | ||
521 : | BitstreamPutBit(bs, 1); | ||
522 : | default: | ||
523 : | break; | ||
524 : | suxen_drol | 1.11 | } |
525 : | } | ||
526 : | |||
527 : | /* | ||
528 : | dbquant | ||
529 : | -2 10b | ||
530 : | 0 0b | ||
531 : | +2 11b | ||
532 : | */ | ||
533 : | |||
534 : | chl | 1.25.2.1 | static __inline void |
535 : | edgomez | 1.17 | put_bvop_dbquant(Bitstream * bs, |
536 : | int value) | ||
537 : | { | ||
538 : | switch (value) { | ||
539 : | case 0: | ||
540 : | BitstreamPutBit(bs, 0); | ||
541 : | return; | ||
542 : | |||
543 : | case -2: | ||
544 : | BitstreamPutBit(bs, 1); | ||
545 : | BitstreamPutBit(bs, 0); | ||
546 : | return; | ||
547 : | suxen_drol | 1.11 | |
548 : | edgomez | 1.17 | case 2: |
549 : | BitstreamPutBit(bs, 1); | ||
550 : | BitstreamPutBit(bs, 1); | ||
551 : | return; | ||
552 : | suxen_drol | 1.11 | |
553 : | edgomez | 1.17 | default:; // invalid |
554 : | suxen_drol | 1.11 | } |
555 : | } | ||
556 : | |||
557 : | |||
558 : | |||
559 : | edgomez | 1.17 | void |
560 : | MBCodingBVOP(const MACROBLOCK * mb, | ||
561 : | const int16_t qcoeff[6 * 64], | ||
562 : | const int32_t fcode, | ||
563 : | const int32_t bcode, | ||
564 : | Bitstream * bs, | ||
565 : | h | 1.25.2.2 | Statistics * pStat, |
566 : | int direction) | ||
567 : | suxen_drol | 1.11 | { |
568 : | chl | 1.25.2.1 | int vcode = fcode; |
569 : | unsigned int i; | ||
570 : | suxen_drol | 1.11 | |
571 : | /* ------------------------------------------------------------------ | ||
572 : | chl | 1.21 | when a block is skipped it is decoded DIRECT(0,0) |
573 : | hence is interpolated from forward & backward frames | ||
574 : | suxen_drol | 1.11 | ------------------------------------------------------------------ */ |
575 : | |||
576 : | chl | 1.21 | if (mb->mode == MODE_DIRECT_NONE_MV) { |
577 : | edgomez | 1.17 | BitstreamPutBit(bs, 1); // skipped |
578 : | suxen_drol | 1.11 | return; |
579 : | } | ||
580 : | |||
581 : | BitstreamPutBit(bs, 0); // not skipped | ||
582 : | |||
583 : | edgomez | 1.17 | if (mb->cbp == 0) { |
584 : | BitstreamPutBit(bs, 1); // cbp == 0 | ||
585 : | } else { | ||
586 : | BitstreamPutBit(bs, 0); // cbp == xxx | ||
587 : | suxen_drol | 1.11 | } |
588 : | |||
589 : | put_bvop_mbtype(bs, mb->mode); | ||
590 : | |||
591 : | edgomez | 1.17 | if (mb->cbp) { |
592 : | suxen_drol | 1.11 | BitstreamPutBits(bs, mb->cbp, 6); |
593 : | } | ||
594 : | |||
595 : | edgomez | 1.17 | if (mb->mode != MODE_DIRECT && mb->cbp != 0) { |
596 : | put_bvop_dbquant(bs, 0); // todo: mb->dquant = 0 | ||
597 : | suxen_drol | 1.11 | } |
598 : | |||
599 : | chl | 1.25.2.1 | switch (mb->mode) { |
600 : | case MODE_INTERPOLATE: | ||
601 : | CodeVector(bs, mb->pmvs[1].x, vcode, pStat); //forward vector of interpolate mode | ||
602 : | CodeVector(bs, mb->pmvs[1].y, vcode, pStat); | ||
603 : | case MODE_BACKWARD: | ||
604 : | vcode = bcode; | ||
605 : | case MODE_FORWARD: | ||
606 : | CodeVector(bs, mb->pmvs[0].x, vcode, pStat); | ||
607 : | CodeVector(bs, mb->pmvs[0].y, vcode, pStat); | ||
608 : | break; | ||
609 : | case MODE_DIRECT: | ||
610 : | CodeVector(bs, mb->pmvs[3].x, 1, pStat); // fcode is always 1 for delta vector | ||
611 : | CodeVector(bs, mb->pmvs[3].y, 1, pStat); // prediction is always (0,0) | ||
612 : | default: break; | ||
613 : | suxen_drol | 1.11 | } |
614 : | edgomez | 1.17 | |
615 : | for (i = 0; i < 6; i++) { | ||
616 : | if (mb->cbp & (1 << (5 - i))) { | ||
617 : | h | 1.25.2.2 | CodeCoeff(bs, &qcoeff[i * 64], inter_table, scan_tables[direction], 0); |
618 : | suxen_drol | 1.11 | } |
619 : | edgomez | 1.17 | } |
620 : | suxen_drol | 1.11 | } |
621 : | |||
622 : | Isibaar | 1.1 | |
623 : | |||
624 : | /*************************************************************** | ||
625 : | edgomez | 1.2 | * decoding stuff starts here * |
626 : | ***************************************************************/ | ||
627 : | Isibaar | 1.1 | |
628 : | suxen_drol | 1.19 | |
629 : | // for IVOP addbits == 0 | ||
630 : | // for PVOP addbits == fcode - 1 | ||
631 : | // for BVOP addbits == max(fcode,bcode) - 1 | ||
632 : | // returns true or false | ||
633 : | int | ||
634 : | check_resync_marker(Bitstream * bs, int addbits) | ||
635 : | { | ||
636 : | uint32_t nbits; | ||
637 : | uint32_t code; | ||
638 : | uint32_t nbitsresyncmarker = NUMBITS_VP_RESYNC_MARKER + addbits; | ||
639 : | |||
640 : | nbits = BitstreamNumBitsToByteAlign(bs); | ||
641 : | code = BitstreamShowBits(bs, nbits); | ||
642 : | |||
643 : | if (code == (((uint32_t)1 << (nbits - 1)) - 1)) | ||
644 : | { | ||
645 : | return BitstreamShowBitsFromByteAlign(bs, nbitsresyncmarker) == RESYNC_MARKER; | ||
646 : | } | ||
647 : | |||
648 : | return 0; | ||
649 : | } | ||
650 : | |||
651 : | |||
652 : | |||
653 : | edgomez | 1.17 | int |
654 : | get_mcbpc_intra(Bitstream * bs) | ||
655 : | Isibaar | 1.1 | { |
656 : | edgomez | 1.7 | |
657 : | Isibaar | 1.1 | uint32_t index; |
658 : | edgomez | 1.17 | |
659 : | suxen_drol | 1.19 | index = BitstreamShowBits(bs, 9); |
660 : | Isibaar | 1.1 | index >>= 3; |
661 : | |||
662 : | BitstreamSkip(bs, mcbpc_intra_table[index].len); | ||
663 : | edgomez | 1.7 | |
664 : | Isibaar | 1.1 | return mcbpc_intra_table[index].code; |
665 : | edgomez | 1.7 | |
666 : | Isibaar | 1.1 | } |
667 : | |||
668 : | edgomez | 1.17 | int |
669 : | get_mcbpc_inter(Bitstream * bs) | ||
670 : | Isibaar | 1.1 | { |
671 : | edgomez | 1.7 | |
672 : | Isibaar | 1.1 | uint32_t index; |
673 : | suxen_drol | 1.19 | |
674 : | index = CLIP(BitstreamShowBits(bs, 9), 256); | ||
675 : | Isibaar | 1.1 | |
676 : | edgomez | 1.17 | BitstreamSkip(bs, mcbpc_inter_table[index].len); |
677 : | edgomez | 1.7 | |
678 : | Isibaar | 1.1 | return mcbpc_inter_table[index].code; |
679 : | edgomez | 1.7 | |
680 : | Isibaar | 1.1 | } |
681 : | |||
682 : | edgomez | 1.17 | int |
683 : | get_cbpy(Bitstream * bs, | ||
684 : | int intra) | ||
685 : | Isibaar | 1.1 | { |
686 : | edgomez | 1.7 | |
687 : | Isibaar | 1.1 | int cbpy; |
688 : | uint32_t index = BitstreamShowBits(bs, 6); | ||
689 : | |||
690 : | BitstreamSkip(bs, cbpy_table[index].len); | ||
691 : | cbpy = cbpy_table[index].code; | ||
692 : | |||
693 : | edgomez | 1.17 | if (!intra) |
694 : | Isibaar | 1.1 | cbpy = 15 - cbpy; |
695 : | |||
696 : | return cbpy; | ||
697 : | edgomez | 1.7 | |
698 : | Isibaar | 1.1 | } |
699 : | |||
700 : | chl | 1.25.2.1 | static __inline int |
701 : | edgomez | 1.17 | get_mv_data(Bitstream * bs) |
702 : | Isibaar | 1.1 | { |
703 : | edgomez | 1.7 | |
704 : | Isibaar | 1.1 | uint32_t index; |
705 : | |||
706 : | edgomez | 1.17 | if (BitstreamGetBit(bs)) |
707 : | Isibaar | 1.1 | return 0; |
708 : | edgomez | 1.17 | |
709 : | Isibaar | 1.1 | index = BitstreamShowBits(bs, 12); |
710 : | |||
711 : | edgomez | 1.17 | if (index >= 512) { |
712 : | Isibaar | 1.1 | index = (index >> 8) - 2; |
713 : | BitstreamSkip(bs, TMNMVtab0[index].len); | ||
714 : | return TMNMVtab0[index].code; | ||
715 : | } | ||
716 : | edgomez | 1.17 | |
717 : | if (index >= 128) { | ||
718 : | Isibaar | 1.1 | index = (index >> 2) - 32; |
719 : | BitstreamSkip(bs, TMNMVtab1[index].len); | ||
720 : | return TMNMVtab1[index].code; | ||
721 : | } | ||
722 : | |||
723 : | edgomez | 1.17 | index -= 4; |
724 : | Isibaar | 1.1 | |
725 : | BitstreamSkip(bs, TMNMVtab2[index].len); | ||
726 : | return TMNMVtab2[index].code; | ||
727 : | edgomez | 1.7 | |
728 : | Isibaar | 1.1 | } |
729 : | |||
730 : | edgomez | 1.17 | int |
731 : | get_mv(Bitstream * bs, | ||
732 : | int fcode) | ||
733 : | Isibaar | 1.1 | { |
734 : | edgomez | 1.7 | |
735 : | Isibaar | 1.1 | int data; |
736 : | int res; | ||
737 : | int mv; | ||
738 : | int scale_fac = 1 << (fcode - 1); | ||
739 : | |||
740 : | data = get_mv_data(bs); | ||
741 : | edgomez | 1.17 | |
742 : | if (scale_fac == 1 || data == 0) | ||
743 : | Isibaar | 1.1 | return data; |
744 : | |||
745 : | res = BitstreamGetBits(bs, fcode - 1); | ||
746 : | mv = ((ABS(data) - 1) * scale_fac) + res + 1; | ||
747 : | edgomez | 1.17 | |
748 : | Isibaar | 1.1 | return data < 0 ? -mv : mv; |
749 : | edgomez | 1.7 | |
750 : | Isibaar | 1.1 | } |
751 : | |||
752 : | edgomez | 1.17 | int |
753 : | get_dc_dif(Bitstream * bs, | ||
754 : | uint32_t dc_size) | ||
755 : | Isibaar | 1.1 | { |
756 : | edgomez | 1.7 | |
757 : | Isibaar | 1.1 | int code = BitstreamGetBits(bs, dc_size); |
758 : | int msb = code >> (dc_size - 1); | ||
759 : | |||
760 : | edgomez | 1.17 | if (msb == 0) |
761 : | return (-1 * (code ^ ((1 << dc_size) - 1))); | ||
762 : | Isibaar | 1.1 | |
763 : | return code; | ||
764 : | edgomez | 1.7 | |
765 : | Isibaar | 1.1 | } |
766 : | |||
767 : | edgomez | 1.17 | int |
768 : | get_dc_size_lum(Bitstream * bs) | ||
769 : | Isibaar | 1.1 | { |
770 : | edgomez | 1.7 | |
771 : | Isibaar | 1.1 | int code, i; |
772 : | edgomez | 1.17 | |
773 : | Isibaar | 1.1 | code = BitstreamShowBits(bs, 11); |
774 : | |||
775 : | edgomez | 1.17 | for (i = 11; i > 3; i--) { |
776 : | if (code == 1) { | ||
777 : | Isibaar | 1.1 | BitstreamSkip(bs, i); |
778 : | return i + 1; | ||
779 : | } | ||
780 : | code >>= 1; | ||
781 : | } | ||
782 : | |||
783 : | BitstreamSkip(bs, dc_lum_tab[code].len); | ||
784 : | return dc_lum_tab[code].code; | ||
785 : | edgomez | 1.7 | |
786 : | Isibaar | 1.1 | } |
787 : | |||
788 : | |||
789 : | edgomez | 1.17 | int |
790 : | get_dc_size_chrom(Bitstream * bs) | ||
791 : | Isibaar | 1.1 | { |
792 : | edgomez | 1.7 | |
793 : | Isibaar | 1.1 | uint32_t code, i; |
794 : | edgomez | 1.17 | |
795 : | Isibaar | 1.1 | code = BitstreamShowBits(bs, 12); |
796 : | |||
797 : | edgomez | 1.17 | for (i = 12; i > 2; i--) { |
798 : | if (code == 1) { | ||
799 : | Isibaar | 1.1 | BitstreamSkip(bs, i); |
800 : | return i; | ||
801 : | } | ||
802 : | code >>= 1; | ||
803 : | } | ||
804 : | |||
805 : | return 3 - BitstreamGetBits(bs, 2); | ||
806 : | edgomez | 1.7 | |
807 : | Isibaar | 1.1 | } |
808 : | |||
809 : | edgomez | 1.17 | void |
810 : | get_intra_block(Bitstream * bs, | ||
811 : | int16_t * block, | ||
812 : | int direction, | ||
813 : | int coeff) | ||
814 : | Isibaar | 1.1 | { |
815 : | edgomez | 1.7 | |
816 : | edgomez | 1.17 | const uint16_t *scan = scan_tables[direction]; |
817 : | chl | 1.25.2.1 | int level, run, last; |
818 : | Isibaar | 1.1 | |
819 : | edgomez | 1.17 | do { |
820 : | Isibaar | 1.1 | level = get_coeff(bs, &run, &last, 1, 0); |
821 : | edgomez | 1.17 | if (run == -1) { |
822 : | Isibaar | 1.1 | DEBUG("fatal: invalid run"); |
823 : | break; | ||
824 : | } | ||
825 : | coeff += run; | ||
826 : | edgomez | 1.17 | block[scan[coeff]] = level; |
827 : | suxen_drol | 1.20 | |
828 : | DPRINTF(DPRINTF_COEFF,"block[%i] %i", scan[coeff], level); | ||
829 : | //DPRINTF(DPRINTF_COEFF,"block[%i] %i %08x", scan[coeff], level, BitstreamShowBits(bs, 32)); | ||
830 : | |||
831 : | edgomez | 1.17 | if (level < -127 || level > 127) { |
832 : | Isibaar | 1.1 | DEBUG1("warning: intra_overflow", level); |
833 : | } | ||
834 : | coeff++; | ||
835 : | } while (!last); | ||
836 : | edgomez | 1.7 | |
837 : | Isibaar | 1.1 | } |
838 : | |||
839 : | edgomez | 1.17 | void |
840 : | get_inter_block(Bitstream * bs, | ||
841 : | h | 1.25.2.2 | int16_t * block, |
842 : | int direction) | ||
843 : | Isibaar | 1.1 | { |
844 : | edgomez | 1.7 | |
845 : | h | 1.25.2.2 | const uint16_t *scan = scan_tables[direction]; |
846 : | Isibaar | 1.1 | int p; |
847 : | int level; | ||
848 : | int run; | ||
849 : | int last; | ||
850 : | |||
851 : | p = 0; | ||
852 : | edgomez | 1.17 | do { |
853 : | Isibaar | 1.1 | level = get_coeff(bs, &run, &last, 0, 0); |
854 : | edgomez | 1.17 | if (run == -1) { |
855 : | Isibaar | 1.1 | DEBUG("fatal: invalid run"); |
856 : | break; | ||
857 : | } | ||
858 : | p += run; | ||
859 : | chenm001 | 1.16 | |
860 : | edgomez | 1.17 | block[scan[p]] = level; |
861 : | suxen_drol | 1.20 | |
862 : | DPRINTF(DPRINTF_COEFF,"block[%i] %i", scan[p], level); | ||
863 : | // DPRINTF(DPRINTF_COEFF,"block[%i] %i %08x", scan[p], level, BitstreamShowBits(bs, 32)); | ||
864 : | |||
865 : | edgomez | 1.17 | if (level < -127 || level > 127) { |
866 : | Isibaar | 1.1 | DEBUG1("warning: inter_overflow", level); |
867 : | } | ||
868 : | p++; | ||
869 : | } while (!last); | ||
870 : | edgomez | 1.7 | |
871 : | Isibaar | 1.1 | } |
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