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1 : | suxen_drol | 118 | /****************************************************************************** |
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 | 153 | * mbcoding.c * |
33 : | suxen_drol | 118 | * * |
34 : | Isibaar | 153 | * Copyright (C) 2002 - Michael Militzer <isibaar@xvid.org> * |
35 : | suxen_drol | 118 | * * |
36 : | * For more information visit the XviD homepage: http://www.xvid.org * | ||
37 : | * * | ||
38 : | ******************************************************************************/ | ||
39 : | |||
40 : | /****************************************************************************** | ||
41 : | * * | ||
42 : | * Revision history: * | ||
43 : | * * | ||
44 : | chl | 619 | * 28.10.2002 GMC support - gruel * |
45 : | suxen_drol | 248 | * 28.06.2002 added check_resync_marker() * |
46 : | Isibaar | 153 | * 14.04.2002 bframe encoding * |
47 : | suxen_drol | 118 | * 08.03.2002 initial version; isibaar * |
48 : | * * | ||
49 : | ******************************************************************************/ | ||
50 : | |||
51 : | |||
52 : | |||
53 : | Isibaar | 100 | #include <stdlib.h> |
54 : | Isibaar | 3 | #include "../portab.h" |
55 : | #include "bitstream.h" | ||
56 : | #include "zigzag.h" | ||
57 : | #include "vlc_codes.h" | ||
58 : | Isibaar | 100 | #include "mbcoding.h" |
59 : | Isibaar | 3 | |
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 : | suxen_drol | 736 | VLC intra_table[4*2048*64]; |
66 : | VLC inter_table[4*2048*64]; | ||
67 : | Isibaar | 100 | |
68 : | Isibaar | 114 | VLC DCT3Dintra[4096]; |
69 : | VLC DCT3Dinter[4096]; | ||
70 : | Isibaar | 3 | |
71 : | chl | 619 | /* not really MB related, but VLCs are only available here */ |
72 : | suxen_drol | 622 | void bs_put_spritetrajectory(Bitstream * bs, const int val) |
73 : | chl | 619 | { |
74 : | const int code = sprite_trajectory_code[val+16384].code; | ||
75 : | const int len = sprite_trajectory_code[val+16384].len; | ||
76 : | const int code2 = sprite_trajectory_len[len].code; | ||
77 : | const int len2 = sprite_trajectory_len[len].len; | ||
78 : | |||
79 : | // printf("GMC=%d Code/Len = %d / %d ",val, code,len); | ||
80 : | // printf("Code2 / Len2 = %d / %d \n",code2,len2); | ||
81 : | |||
82 : | BitstreamPutBits(bs, code2, len2); | ||
83 : | if (len) BitstreamPutBits(bs, code, len); | ||
84 : | } | ||
85 : | |||
86 : | suxen_drol | 631 | int bs_get_spritetrajectory(Bitstream * bs) |
87 : | { | ||
88 : | int i; | ||
89 : | for (i = 0; i < 12; i++) | ||
90 : | { | ||
91 : | if (BitstreamShowBits(bs, sprite_trajectory_len[i].len) == sprite_trajectory_len[i].code) | ||
92 : | { | ||
93 : | BitstreamSkip(bs, sprite_trajectory_len[i].len); | ||
94 : | return i; | ||
95 : | } | ||
96 : | } | ||
97 : | return -1; | ||
98 : | } | ||
99 : | chl | 619 | |
100 : | edgomez | 195 | void |
101 : | init_vlc_tables(void) | ||
102 : | Isibaar | 3 | { |
103 : | edgomez | 78 | |
104 : | Isibaar | 3 | int32_t k, l, i, intra, last; |
105 : | VLC *vlc[2]; | ||
106 : | VLC **coeff_ptr; | ||
107 : | VLC *vlc1, *vlc2; | ||
108 : | |||
109 : | vlc1 = DCT3Dintra; | ||
110 : | vlc2 = DCT3Dinter; | ||
111 : | edgomez | 195 | |
112 : | Isibaar | 100 | vlc[0] = intra_table; |
113 : | vlc[1] = inter_table; | ||
114 : | edgomez | 195 | |
115 : | Isibaar | 100 | // generate encoding vlc lookup tables |
116 : | Isibaar | 153 | // the lookup table idea is taken from the excellent fame project by Vivien Chapellier |
117 : | edgomez | 195 | for (i = 0; i < 4; i++) { |
118 : | Isibaar | 3 | intra = i % 2; |
119 : | Isibaar | 100 | last = i / 2; |
120 : | Isibaar | 3 | |
121 : | Isibaar | 100 | coeff_ptr = coeff_vlc[last + 2 * intra]; |
122 : | edgomez | 195 | |
123 : | for (k = -2047; k < 2048; k++) { // level | ||
124 : | Isibaar | 100 | int8_t *max_level_ptr = max_level[last + 2 * intra]; |
125 : | int8_t *max_run_ptr = max_run[last + 2 * intra]; | ||
126 : | edgomez | 195 | |
127 : | for (l = 0; l < 64; l++) { // run | ||
128 : | Isibaar | 35 | int32_t level = k; |
129 : | Isibaar | 209 | ptr_t run = l; |
130 : | edgomez | 195 | |
131 : | if ((abs(level) <= max_level_ptr[run]) && (run <= (uint32_t) max_run_ptr[abs(level)])) { // level < max_level and run < max_run | ||
132 : | |||
133 : | vlc[intra]->code = 0; | ||
134 : | vlc[intra]->len = 0; | ||
135 : | goto loop_end; | ||
136 : | } else { | ||
137 : | if (level > 0) // correct level | ||
138 : | Isibaar | 3 | level -= max_level_ptr[run]; |
139 : | else | ||
140 : | level += max_level_ptr[run]; | ||
141 : | Isibaar | 35 | |
142 : | edgomez | 195 | if ((abs(level) <= max_level_ptr[run]) && |
143 : | (run <= (uint32_t) max_run_ptr[abs(level)])) { | ||
144 : | |||
145 : | Isibaar | 100 | vlc[intra]->code = 0x06; |
146 : | vlc[intra]->len = 8; | ||
147 : | goto loop_end; | ||
148 : | } | ||
149 : | Isibaar | 3 | |
150 : | edgomez | 195 | if (level > 0) // still here? |
151 : | level += max_level_ptr[run]; // restore level | ||
152 : | Isibaar | 100 | else |
153 : | level -= max_level_ptr[run]; | ||
154 : | |||
155 : | edgomez | 195 | run -= max_run_ptr[abs(level)] + 1; // and change run |
156 : | Isibaar | 100 | |
157 : | edgomez | 195 | if ((abs(level) <= max_level_ptr[run]) && |
158 : | (run <= (uint32_t) max_run_ptr[abs(level)])) { | ||
159 : | |||
160 : | Isibaar | 100 | vlc[intra]->code = 0x0e; |
161 : | vlc[intra]->len = 9; | ||
162 : | goto loop_end; | ||
163 : | Isibaar | 3 | } |
164 : | Isibaar | 100 | run += max_run_ptr[abs(level)] + 1; |
165 : | Isibaar | 3 | } |
166 : | Isibaar | 100 | |
167 : | edgomez | 195 | vlc[intra]->code = |
168 : | (uint32_t) ((l << 14) | (0x1e + last) << 20) | (1 << 13) | | ||
169 : | ((k & 0xfff) << 1) | 1; | ||
170 : | Isibaar | 100 | |
171 : | vlc[intra]->len = 30; | ||
172 : | Isibaar | 3 | vlc[intra]++; |
173 : | Isibaar | 100 | continue; |
174 : | |||
175 : | edgomez | 195 | loop_end: |
176 : | if (level != 0) { | ||
177 : | vlc[intra]->code = | ||
178 : | (vlc[intra]-> | ||
179 : | code << (coeff_ptr[run][abs(level) - 1].len + | ||
180 : | 1)) | (coeff_ptr[run][abs(level) - | ||
181 : | 1].code << 1); | ||
182 : | vlc[intra]->len = | ||
183 : | (coeff_ptr[run][abs(level) - 1].len + 1) + | ||
184 : | vlc[intra]->len; | ||
185 : | Isibaar | 100 | |
186 : | edgomez | 195 | if (level < 0) |
187 : | Isibaar | 100 | vlc[intra]->code += 1; |
188 : | } | ||
189 : | |||
190 : | vlc[intra]++; | ||
191 : | Isibaar | 3 | } |
192 : | } | ||
193 : | } | ||
194 : | edgomez | 78 | |
195 : | edgomez | 195 | for (i = 0; i < 4096; i++) { |
196 : | if (i >= 512) { | ||
197 : | Isibaar | 3 | *vlc1 = DCT3Dtab3[(i >> 5) - 16]; |
198 : | *vlc2 = DCT3Dtab0[(i >> 5) - 16]; | ||
199 : | edgomez | 195 | } else if (i >= 128) { |
200 : | Isibaar | 3 | *vlc1 = DCT3Dtab4[(i >> 2) - 32]; |
201 : | *vlc2 = DCT3Dtab1[(i >> 2) - 32]; | ||
202 : | edgomez | 195 | } else if (i >= 8) { |
203 : | Isibaar | 3 | *vlc1 = DCT3Dtab5[i - 8]; |
204 : | *vlc2 = DCT3Dtab2[i - 8]; | ||
205 : | edgomez | 195 | } else { |
206 : | Isibaar | 3 | *vlc1 = ERRtab[i]; |
207 : | *vlc2 = ERRtab[i]; | ||
208 : | } | ||
209 : | |||
210 : | vlc1++; | ||
211 : | vlc2++; | ||
212 : | } | ||
213 : | DCT3D[0] = DCT3Dinter; | ||
214 : | DCT3D[1] = DCT3Dintra; | ||
215 : | |||
216 : | chl | 619 | |
217 : | /* init sprite_trajectory tables */ | ||
218 : | /* even if GMC is not specified (it might be used later...) */ | ||
219 : | |||
220 : | sprite_trajectory_code[0+16384].code = 0; | ||
221 : | sprite_trajectory_code[0+16384].len = 0; | ||
222 : | for (k=0;k<14;k++) | ||
223 : | { | ||
224 : | int limit = (1<<k); | ||
225 : | |||
226 : | for (i=-(2*limit-1); i<= -limit; i++) | ||
227 : | { | ||
228 : | sprite_trajectory_code[i+16384].code = (2*limit-1)+i; | ||
229 : | sprite_trajectory_code[i+16384].len = k+1; | ||
230 : | } | ||
231 : | |||
232 : | for (i=limit; i<= 2*limit-1; i++) | ||
233 : | { | ||
234 : | sprite_trajectory_code[i+16384].code = i; | ||
235 : | sprite_trajectory_code[i+16384].len = k+1; | ||
236 : | } | ||
237 : | } | ||
238 : | Isibaar | 3 | } |
239 : | |||
240 : | edgomez | 195 | static __inline void |
241 : | CodeVector(Bitstream * bs, | ||
242 : | int32_t value, | ||
243 : | int32_t f_code, | ||
244 : | Statistics * pStat) | ||
245 : | Isibaar | 3 | { |
246 : | edgomez | 78 | |
247 : | Isibaar | 3 | const int scale_factor = 1 << (f_code - 1); |
248 : | const int cmp = scale_factor << 5; | ||
249 : | |||
250 : | edgomez | 195 | if (value < (-1 * cmp)) |
251 : | Isibaar | 3 | value += 64 * scale_factor; |
252 : | edgomez | 195 | |
253 : | if (value > (cmp - 1)) | ||
254 : | Isibaar | 3 | value -= 64 * scale_factor; |
255 : | |||
256 : | edgomez | 78 | pStat->iMvSum += value * value; |
257 : | pStat->iMvCount++; | ||
258 : | Isibaar | 3 | |
259 : | edgomez | 78 | if (value == 0) { |
260 : | edgomez | 195 | BitstreamPutBits(bs, mb_motion_table[32].code, |
261 : | mb_motion_table[32].len); | ||
262 : | edgomez | 78 | } else { |
263 : | Isibaar | 3 | uint16_t length, code, mv_res, sign; |
264 : | edgomez | 195 | |
265 : | Isibaar | 3 | length = 16 << f_code; |
266 : | f_code--; | ||
267 : | edgomez | 195 | |
268 : | Isibaar | 3 | sign = (value < 0); |
269 : | |||
270 : | edgomez | 195 | if (value >= length) |
271 : | Isibaar | 3 | value -= 2 * length; |
272 : | edgomez | 195 | else if (value < -length) |
273 : | Isibaar | 3 | value += 2 * length; |
274 : | |||
275 : | edgomez | 195 | if (sign) |
276 : | Isibaar | 3 | value = -value; |
277 : | |||
278 : | value--; | ||
279 : | mv_res = value & ((1 << f_code) - 1); | ||
280 : | code = ((value - mv_res) >> f_code) + 1; | ||
281 : | |||
282 : | edgomez | 195 | if (sign) |
283 : | Isibaar | 3 | code = -code; |
284 : | |||
285 : | code += 32; | ||
286 : | edgomez | 195 | BitstreamPutBits(bs, mb_motion_table[code].code, |
287 : | mb_motion_table[code].len); | ||
288 : | |||
289 : | if (f_code) | ||
290 : | Isibaar | 3 | BitstreamPutBits(bs, mv_res, f_code); |
291 : | edgomez | 78 | } |
292 : | |||
293 : | Isibaar | 3 | } |
294 : | |||
295 : | |||
296 : | edgomez | 195 | static __inline void |
297 : | CodeCoeff(Bitstream * bs, | ||
298 : | const int16_t qcoeff[64], | ||
299 : | VLC * table, | ||
300 : | const uint16_t * zigzag, | ||
301 : | uint16_t intra) | ||
302 : | edgomez | 78 | { |
303 : | |||
304 : | Isibaar | 3 | uint32_t j, last; |
305 : | short v; | ||
306 : | VLC *vlc; | ||
307 : | edgomez | 195 | |
308 : | Isibaar | 3 | j = intra; |
309 : | Isibaar | 116 | last = intra; |
310 : | Isibaar | 3 | |
311 : | edgomez | 195 | while (j < 64 && (v = qcoeff[zigzag[j]]) == 0) |
312 : | j++; | ||
313 : | |||
314 : | Isibaar | 3 | do { |
315 : | Isibaar | 153 | vlc = table + 64 * 2047 + (v << 6) + j - last; |
316 : | Isibaar | 116 | last = ++j; |
317 : | Isibaar | 153 | |
318 : | // count zeroes | ||
319 : | edgomez | 195 | while (j < 64 && (v = qcoeff[zigzag[j]]) == 0) |
320 : | j++; | ||
321 : | |||
322 : | Isibaar | 3 | // write code |
323 : | edgomez | 195 | if (j != 64) { |
324 : | Isibaar | 3 | BitstreamPutBits(bs, vlc->code, vlc->len); |
325 : | } else { | ||
326 : | Isibaar | 153 | vlc += 64 * 4095; |
327 : | Isibaar | 3 | BitstreamPutBits(bs, vlc->code, vlc->len); |
328 : | break; | ||
329 : | } | ||
330 : | edgomez | 195 | } while (1); |
331 : | edgomez | 78 | |
332 : | Isibaar | 3 | } |
333 : | |||
334 : | |||
335 : | chl | 530 | static __inline void |
336 : | chl | 619 | CodeBlockIntra(const FRAMEINFO * const frame, |
337 : | edgomez | 195 | const MACROBLOCK * pMB, |
338 : | int16_t qcoeff[6 * 64], | ||
339 : | edgomez | 78 | Bitstream * bs, |
340 : | Statistics * pStat) | ||
341 : | Isibaar | 3 | { |
342 : | edgomez | 78 | |
343 : | Isibaar | 3 | uint32_t i, mcbpc, cbpy, bits; |
344 : | |||
345 : | cbpy = pMB->cbp >> 2; | ||
346 : | |||
347 : | edgomez | 78 | // write mcbpc |
348 : | edgomez | 195 | if (frame->coding_type == I_VOP) { |
349 : | edgomez | 78 | mcbpc = ((pMB->mode >> 1) & 3) | ((pMB->cbp & 3) << 2); |
350 : | edgomez | 195 | BitstreamPutBits(bs, mcbpc_intra_tab[mcbpc].code, |
351 : | mcbpc_intra_tab[mcbpc].len); | ||
352 : | } else { | ||
353 : | edgomez | 78 | mcbpc = (pMB->mode & 7) | ((pMB->cbp & 3) << 3); |
354 : | edgomez | 195 | BitstreamPutBits(bs, mcbpc_inter_tab[mcbpc].code, |
355 : | mcbpc_inter_tab[mcbpc].len); | ||
356 : | Isibaar | 28 | } |
357 : | Isibaar | 3 | |
358 : | // ac prediction flag | ||
359 : | edgomez | 195 | if (pMB->acpred_directions[0]) |
360 : | edgomez | 78 | BitstreamPutBits(bs, 1, 1); |
361 : | Isibaar | 3 | else |
362 : | edgomez | 78 | BitstreamPutBits(bs, 0, 1); |
363 : | Isibaar | 3 | |
364 : | edgomez | 78 | // write cbpy |
365 : | edgomez | 195 | BitstreamPutBits(bs, cbpy_tab[cbpy].code, cbpy_tab[cbpy].len); |
366 : | Isibaar | 3 | |
367 : | // write dquant | ||
368 : | edgomez | 195 | if (pMB->mode == MODE_INTRA_Q) |
369 : | Isibaar | 3 | BitstreamPutBits(bs, pMB->dquant, 2); |
370 : | |||
371 : | h | 69 | // write interlacing |
372 : | edgomez | 195 | if (frame->global_flags & XVID_INTERLACING) { |
373 : | h | 69 | BitstreamPutBit(bs, pMB->field_dct); |
374 : | } | ||
375 : | Isibaar | 3 | // code block coeffs |
376 : | edgomez | 195 | for (i = 0; i < 6; i++) { |
377 : | if (i < 4) | ||
378 : | BitstreamPutBits(bs, dcy_tab[qcoeff[i * 64 + 0] + 255].code, | ||
379 : | dcy_tab[qcoeff[i * 64 + 0] + 255].len); | ||
380 : | Isibaar | 3 | else |
381 : | edgomez | 195 | BitstreamPutBits(bs, dcc_tab[qcoeff[i * 64 + 0] + 255].code, |
382 : | dcc_tab[qcoeff[i * 64 + 0] + 255].len); | ||
383 : | |||
384 : | if (pMB->cbp & (1 << (5 - i))) { | ||
385 : | h | 543 | const uint16_t *scan_table = |
386 : | frame->global_flags & XVID_ALTERNATESCAN ? | ||
387 : | scan_tables[2] : scan_tables[pMB->acpred_directions[i]]; | ||
388 : | |||
389 : | Isibaar | 3 | bits = BitstreamPos(bs); |
390 : | |||
391 : | h | 543 | CodeCoeff(bs, &qcoeff[i * 64], intra_table, scan_table, 1); |
392 : | Isibaar | 3 | |
393 : | bits = BitstreamPos(bs) - bits; | ||
394 : | pStat->iTextBits += bits; | ||
395 : | } | ||
396 : | } | ||
397 : | edgomez | 78 | |
398 : | Isibaar | 3 | } |
399 : | |||
400 : | |||
401 : | edgomez | 195 | static void |
402 : | chl | 619 | CodeBlockInter(const FRAMEINFO * const frame, |
403 : | edgomez | 195 | const MACROBLOCK * pMB, |
404 : | int16_t qcoeff[6 * 64], | ||
405 : | edgomez | 78 | Bitstream * bs, |
406 : | Statistics * pStat) | ||
407 : | Isibaar | 3 | { |
408 : | edgomez | 78 | |
409 : | Isibaar | 3 | int32_t i; |
410 : | uint32_t bits, mcbpc, cbpy; | ||
411 : | chl | 619 | int mcsel=0; |
412 : | Isibaar | 3 | |
413 : | edgomez | 78 | mcbpc = (pMB->mode & 7) | ((pMB->cbp & 3) << 3); |
414 : | Isibaar | 3 | cbpy = 15 - (pMB->cbp >> 2); |
415 : | |||
416 : | // write mcbpc | ||
417 : | edgomez | 195 | BitstreamPutBits(bs, mcbpc_inter_tab[mcbpc].code, |
418 : | mcbpc_inter_tab[mcbpc].len); | ||
419 : | Isibaar | 3 | |
420 : | chl | 619 | if ( (frame->coding_type == S_VOP) && (pMB->mode == MODE_INTER || pMB->mode == MODE_INTER_Q) ) |
421 : | { | ||
422 : | if (frame->quarterpel) { | ||
423 : | if ( (pMB->qmvs[0].x == frame->GMC_MV.x) && (pMB->qmvs[0].y == frame->GMC_MV.y) ) | ||
424 : | mcsel=1; | ||
425 : | } else { | ||
426 : | if ( (pMB->mvs[0].x == frame->GMC_MV.x) && (pMB->mvs[0].y == frame->GMC_MV.y) ) | ||
427 : | mcsel=1; | ||
428 : | } | ||
429 : | BitstreamPutBit(bs, mcsel); // mcsel: '0'=local motion, '1'=GMC | ||
430 : | } | ||
431 : | |||
432 : | Isibaar | 3 | // write cbpy |
433 : | BitstreamPutBits(bs, cbpy_tab[cbpy].code, cbpy_tab[cbpy].len); | ||
434 : | |||
435 : | // write dquant | ||
436 : | edgomez | 195 | if (pMB->mode == MODE_INTER_Q) |
437 : | Isibaar | 3 | BitstreamPutBits(bs, pMB->dquant, 2); |
438 : | edgomez | 195 | |
439 : | h | 69 | // interlacing |
440 : | edgomez | 195 | if (frame->global_flags & XVID_INTERLACING) { |
441 : | h | 388 | if (pMB->cbp) { |
442 : | BitstreamPutBit(bs, pMB->field_dct); | ||
443 : | suxen_drol | 721 | DPRINTF(DPRINTF_MB,"codep: field_dct: %i", pMB->field_dct); |
444 : | h | 388 | } |
445 : | h | 69 | |
446 : | // if inter block, write field ME flag | ||
447 : | edgomez | 195 | if (pMB->mode == MODE_INTER || pMB->mode == MODE_INTER_Q) { |
448 : | h | 69 | BitstreamPutBit(bs, pMB->field_pred); |
449 : | suxen_drol | 721 | DPRINTF(DPRINTF_MB,"codep: field_pred: %i", pMB->field_pred); |
450 : | h | 69 | |
451 : | // write field prediction references | ||
452 : | edgomez | 195 | if (pMB->field_pred) { |
453 : | h | 69 | BitstreamPutBit(bs, pMB->field_for_top); |
454 : | BitstreamPutBit(bs, pMB->field_for_bot); | ||
455 : | } | ||
456 : | } | ||
457 : | } | ||
458 : | chl | 619 | // code motion vector(s) if motion is local |
459 : | if (mcsel==0) | ||
460 : | for (i = 0; i < (pMB->mode == MODE_INTER4V ? 4 : 1); i++) { | ||
461 : | CodeVector(bs, pMB->pmvs[i].x, frame->fcode, pStat); | ||
462 : | CodeVector(bs, pMB->pmvs[i].y, frame->fcode, pStat); | ||
463 : | } | ||
464 : | Isibaar | 3 | |
465 : | bits = BitstreamPos(bs); | ||
466 : | edgomez | 195 | |
467 : | Isibaar | 3 | // code block coeffs |
468 : | edgomez | 195 | for (i = 0; i < 6; i++) |
469 : | if (pMB->cbp & (1 << (5 - i))) | ||
470 : | h | 543 | { |
471 : | const uint16_t *scan_table = | ||
472 : | frame->global_flags & XVID_ALTERNATESCAN ? | ||
473 : | scan_tables[2] : scan_tables[0]; | ||
474 : | Isibaar | 3 | |
475 : | h | 543 | CodeCoeff(bs, &qcoeff[i * 64], inter_table, scan_table, 0); |
476 : | } | ||
477 : | |||
478 : | Isibaar | 3 | bits = BitstreamPos(bs) - bits; |
479 : | pStat->iTextBits += bits; | ||
480 : | } | ||
481 : | |||
482 : | |||
483 : | edgomez | 195 | void |
484 : | chl | 619 | MBCoding(const FRAMEINFO * const frame, |
485 : | edgomez | 195 | MACROBLOCK * pMB, |
486 : | int16_t qcoeff[6 * 64], | ||
487 : | Bitstream * bs, | ||
488 : | Statistics * pStat) | ||
489 : | Isibaar | 3 | { |
490 : | chl | 619 | if (frame->coding_type != I_VOP) |
491 : | BitstreamPutBit(bs, 0); // not_coded | ||
492 : | |||
493 : | chl | 335 | if (pMB->mode == MODE_INTRA || pMB->mode == MODE_INTRA_Q) |
494 : | suxen_drol | 136 | CodeBlockIntra(frame, pMB, qcoeff, bs, pStat); |
495 : | Isibaar | 3 | else |
496 : | suxen_drol | 136 | CodeBlockInter(frame, pMB, qcoeff, bs, pStat); |
497 : | edgomez | 78 | |
498 : | Isibaar | 3 | } |
499 : | |||
500 : | chl | 530 | /* |
501 : | // moved to mbcoding.h so that in can be 'static __inline' | ||
502 : | chl | 347 | void |
503 : | MBSkip(Bitstream * bs) | ||
504 : | { | ||
505 : | BitstreamPutBit(bs, 1); // not coded | ||
506 : | } | ||
507 : | chl | 530 | */ |
508 : | chl | 347 | |
509 : | suxen_drol | 118 | /*************************************************************** |
510 : | * bframe encoding start | ||
511 : | ***************************************************************/ | ||
512 : | Isibaar | 3 | |
513 : | suxen_drol | 118 | /* |
514 : | mbtype | ||
515 : | 0 1b direct(h263) mvdb | ||
516 : | 1 01b interpolate mc+q dbquant, mvdf, mvdb | ||
517 : | 2 001b backward mc+q dbquant, mvdb | ||
518 : | 3 0001b forward mc+q dbquant, mvdf | ||
519 : | */ | ||
520 : | |||
521 : | chl | 530 | static __inline void |
522 : | edgomez | 195 | put_bvop_mbtype(Bitstream * bs, |
523 : | int value) | ||
524 : | suxen_drol | 118 | { |
525 : | edgomez | 195 | switch (value) { |
526 : | chl | 530 | case MODE_FORWARD: |
527 : | BitstreamPutBit(bs, 0); | ||
528 : | case MODE_BACKWARD: | ||
529 : | BitstreamPutBit(bs, 0); | ||
530 : | case MODE_INTERPOLATE: | ||
531 : | BitstreamPutBit(bs, 0); | ||
532 : | case MODE_DIRECT: | ||
533 : | BitstreamPutBit(bs, 1); | ||
534 : | default: | ||
535 : | break; | ||
536 : | suxen_drol | 118 | } |
537 : | } | ||
538 : | |||
539 : | /* | ||
540 : | dbquant | ||
541 : | -2 10b | ||
542 : | 0 0b | ||
543 : | +2 11b | ||
544 : | */ | ||
545 : | |||
546 : | chl | 530 | static __inline void |
547 : | edgomez | 195 | put_bvop_dbquant(Bitstream * bs, |
548 : | int value) | ||
549 : | suxen_drol | 118 | { |
550 : | edgomez | 195 | switch (value) { |
551 : | case 0: | ||
552 : | BitstreamPutBit(bs, 0); | ||
553 : | return; | ||
554 : | suxen_drol | 118 | |
555 : | edgomez | 195 | case -2: |
556 : | BitstreamPutBit(bs, 1); | ||
557 : | BitstreamPutBit(bs, 0); | ||
558 : | return; | ||
559 : | suxen_drol | 118 | |
560 : | edgomez | 195 | case 2: |
561 : | BitstreamPutBit(bs, 1); | ||
562 : | BitstreamPutBit(bs, 1); | ||
563 : | return; | ||
564 : | |||
565 : | default:; // invalid | ||
566 : | suxen_drol | 118 | } |
567 : | } | ||
568 : | |||
569 : | |||
570 : | |||
571 : | edgomez | 195 | void |
572 : | MBCodingBVOP(const MACROBLOCK * mb, | ||
573 : | const int16_t qcoeff[6 * 64], | ||
574 : | const int32_t fcode, | ||
575 : | const int32_t bcode, | ||
576 : | Bitstream * bs, | ||
577 : | h | 543 | Statistics * pStat, |
578 : | int direction) | ||
579 : | suxen_drol | 118 | { |
580 : | chl | 530 | int vcode = fcode; |
581 : | unsigned int i; | ||
582 : | suxen_drol | 118 | |
583 : | /* ------------------------------------------------------------------ | ||
584 : | chl | 313 | when a block is skipped it is decoded DIRECT(0,0) |
585 : | hence is interpolated from forward & backward frames | ||
586 : | suxen_drol | 118 | ------------------------------------------------------------------ */ |
587 : | |||
588 : | chl | 313 | if (mb->mode == MODE_DIRECT_NONE_MV) { |
589 : | edgomez | 195 | BitstreamPutBit(bs, 1); // skipped |
590 : | suxen_drol | 118 | return; |
591 : | } | ||
592 : | |||
593 : | BitstreamPutBit(bs, 0); // not skipped | ||
594 : | |||
595 : | edgomez | 195 | if (mb->cbp == 0) { |
596 : | BitstreamPutBit(bs, 1); // cbp == 0 | ||
597 : | } else { | ||
598 : | BitstreamPutBit(bs, 0); // cbp == xxx | ||
599 : | suxen_drol | 118 | } |
600 : | |||
601 : | put_bvop_mbtype(bs, mb->mode); | ||
602 : | |||
603 : | edgomez | 195 | if (mb->cbp) { |
604 : | suxen_drol | 118 | BitstreamPutBits(bs, mb->cbp, 6); |
605 : | } | ||
606 : | |||
607 : | edgomez | 195 | if (mb->mode != MODE_DIRECT && mb->cbp != 0) { |
608 : | put_bvop_dbquant(bs, 0); // todo: mb->dquant = 0 | ||
609 : | suxen_drol | 118 | } |
610 : | |||
611 : | chl | 530 | switch (mb->mode) { |
612 : | case MODE_INTERPOLATE: | ||
613 : | CodeVector(bs, mb->pmvs[1].x, vcode, pStat); //forward vector of interpolate mode | ||
614 : | CodeVector(bs, mb->pmvs[1].y, vcode, pStat); | ||
615 : | case MODE_BACKWARD: | ||
616 : | vcode = bcode; | ||
617 : | case MODE_FORWARD: | ||
618 : | CodeVector(bs, mb->pmvs[0].x, vcode, pStat); | ||
619 : | CodeVector(bs, mb->pmvs[0].y, vcode, pStat); | ||
620 : | break; | ||
621 : | case MODE_DIRECT: | ||
622 : | CodeVector(bs, mb->pmvs[3].x, 1, pStat); // fcode is always 1 for delta vector | ||
623 : | CodeVector(bs, mb->pmvs[3].y, 1, pStat); // prediction is always (0,0) | ||
624 : | default: break; | ||
625 : | suxen_drol | 118 | } |
626 : | |||
627 : | edgomez | 195 | for (i = 0; i < 6; i++) { |
628 : | if (mb->cbp & (1 << (5 - i))) { | ||
629 : | h | 543 | CodeCoeff(bs, &qcoeff[i * 64], inter_table, scan_tables[direction], 0); |
630 : | suxen_drol | 118 | } |
631 : | edgomez | 195 | } |
632 : | suxen_drol | 118 | } |
633 : | |||
634 : | |||
635 : | |||
636 : | Isibaar | 3 | /*************************************************************** |
637 : | edgomez | 15 | * decoding stuff starts here * |
638 : | ***************************************************************/ | ||
639 : | Isibaar | 3 | |
640 : | suxen_drol | 248 | |
641 : | // for IVOP addbits == 0 | ||
642 : | // for PVOP addbits == fcode - 1 | ||
643 : | // for BVOP addbits == max(fcode,bcode) - 1 | ||
644 : | // returns true or false | ||
645 : | int | ||
646 : | check_resync_marker(Bitstream * bs, int addbits) | ||
647 : | { | ||
648 : | uint32_t nbits; | ||
649 : | uint32_t code; | ||
650 : | uint32_t nbitsresyncmarker = NUMBITS_VP_RESYNC_MARKER + addbits; | ||
651 : | |||
652 : | nbits = BitstreamNumBitsToByteAlign(bs); | ||
653 : | code = BitstreamShowBits(bs, nbits); | ||
654 : | |||
655 : | if (code == (((uint32_t)1 << (nbits - 1)) - 1)) | ||
656 : | { | ||
657 : | return BitstreamShowBitsFromByteAlign(bs, nbitsresyncmarker) == RESYNC_MARKER; | ||
658 : | } | ||
659 : | |||
660 : | return 0; | ||
661 : | } | ||
662 : | |||
663 : | |||
664 : | |||
665 : | edgomez | 195 | int |
666 : | get_mcbpc_intra(Bitstream * bs) | ||
667 : | Isibaar | 3 | { |
668 : | edgomez | 78 | |
669 : | Isibaar | 3 | uint32_t index; |
670 : | edgomez | 195 | |
671 : | suxen_drol | 248 | index = BitstreamShowBits(bs, 9); |
672 : | Isibaar | 3 | index >>= 3; |
673 : | |||
674 : | BitstreamSkip(bs, mcbpc_intra_table[index].len); | ||
675 : | edgomez | 78 | |
676 : | Isibaar | 3 | return mcbpc_intra_table[index].code; |
677 : | edgomez | 78 | |
678 : | Isibaar | 3 | } |
679 : | |||
680 : | edgomez | 195 | int |
681 : | get_mcbpc_inter(Bitstream * bs) | ||
682 : | Isibaar | 3 | { |
683 : | edgomez | 78 | |
684 : | Isibaar | 3 | uint32_t index; |
685 : | suxen_drol | 248 | |
686 : | index = CLIP(BitstreamShowBits(bs, 9), 256); | ||
687 : | edgomez | 195 | |
688 : | BitstreamSkip(bs, mcbpc_inter_table[index].len); | ||
689 : | edgomez | 78 | |
690 : | Isibaar | 3 | return mcbpc_inter_table[index].code; |
691 : | edgomez | 78 | |
692 : | Isibaar | 3 | } |
693 : | |||
694 : | edgomez | 195 | int |
695 : | get_cbpy(Bitstream * bs, | ||
696 : | int intra) | ||
697 : | Isibaar | 3 | { |
698 : | edgomez | 78 | |
699 : | Isibaar | 3 | int cbpy; |
700 : | uint32_t index = BitstreamShowBits(bs, 6); | ||
701 : | |||
702 : | BitstreamSkip(bs, cbpy_table[index].len); | ||
703 : | cbpy = cbpy_table[index].code; | ||
704 : | |||
705 : | edgomez | 195 | if (!intra) |
706 : | Isibaar | 3 | cbpy = 15 - cbpy; |
707 : | |||
708 : | return cbpy; | ||
709 : | edgomez | 78 | |
710 : | Isibaar | 3 | } |
711 : | |||
712 : | chl | 530 | static __inline int |
713 : | edgomez | 195 | get_mv_data(Bitstream * bs) |
714 : | Isibaar | 3 | { |
715 : | edgomez | 78 | |
716 : | Isibaar | 3 | uint32_t index; |
717 : | |||
718 : | edgomez | 195 | if (BitstreamGetBit(bs)) |
719 : | Isibaar | 3 | return 0; |
720 : | edgomez | 195 | |
721 : | Isibaar | 3 | index = BitstreamShowBits(bs, 12); |
722 : | |||
723 : | edgomez | 195 | if (index >= 512) { |
724 : | Isibaar | 3 | index = (index >> 8) - 2; |
725 : | BitstreamSkip(bs, TMNMVtab0[index].len); | ||
726 : | return TMNMVtab0[index].code; | ||
727 : | } | ||
728 : | edgomez | 195 | |
729 : | if (index >= 128) { | ||
730 : | Isibaar | 3 | index = (index >> 2) - 32; |
731 : | BitstreamSkip(bs, TMNMVtab1[index].len); | ||
732 : | return TMNMVtab1[index].code; | ||
733 : | } | ||
734 : | |||
735 : | edgomez | 195 | index -= 4; |
736 : | Isibaar | 3 | |
737 : | BitstreamSkip(bs, TMNMVtab2[index].len); | ||
738 : | return TMNMVtab2[index].code; | ||
739 : | edgomez | 78 | |
740 : | Isibaar | 3 | } |
741 : | |||
742 : | edgomez | 195 | int |
743 : | get_mv(Bitstream * bs, | ||
744 : | int fcode) | ||
745 : | Isibaar | 3 | { |
746 : | edgomez | 78 | |
747 : | Isibaar | 3 | int data; |
748 : | int res; | ||
749 : | int mv; | ||
750 : | int scale_fac = 1 << (fcode - 1); | ||
751 : | |||
752 : | data = get_mv_data(bs); | ||
753 : | edgomez | 195 | |
754 : | if (scale_fac == 1 || data == 0) | ||
755 : | Isibaar | 3 | return data; |
756 : | |||
757 : | res = BitstreamGetBits(bs, fcode - 1); | ||
758 : | mv = ((ABS(data) - 1) * scale_fac) + res + 1; | ||
759 : | edgomez | 195 | |
760 : | Isibaar | 3 | return data < 0 ? -mv : mv; |
761 : | edgomez | 78 | |
762 : | Isibaar | 3 | } |
763 : | |||
764 : | edgomez | 195 | int |
765 : | get_dc_dif(Bitstream * bs, | ||
766 : | uint32_t dc_size) | ||
767 : | Isibaar | 3 | { |
768 : | edgomez | 78 | |
769 : | Isibaar | 3 | int code = BitstreamGetBits(bs, dc_size); |
770 : | int msb = code >> (dc_size - 1); | ||
771 : | |||
772 : | edgomez | 195 | if (msb == 0) |
773 : | return (-1 * (code ^ ((1 << dc_size) - 1))); | ||
774 : | Isibaar | 3 | |
775 : | return code; | ||
776 : | edgomez | 78 | |
777 : | Isibaar | 3 | } |
778 : | |||
779 : | edgomez | 195 | int |
780 : | get_dc_size_lum(Bitstream * bs) | ||
781 : | Isibaar | 3 | { |
782 : | edgomez | 78 | |
783 : | Isibaar | 3 | int code, i; |
784 : | edgomez | 195 | |
785 : | Isibaar | 3 | code = BitstreamShowBits(bs, 11); |
786 : | |||
787 : | edgomez | 195 | for (i = 11; i > 3; i--) { |
788 : | if (code == 1) { | ||
789 : | Isibaar | 3 | BitstreamSkip(bs, i); |
790 : | return i + 1; | ||
791 : | } | ||
792 : | code >>= 1; | ||
793 : | } | ||
794 : | |||
795 : | BitstreamSkip(bs, dc_lum_tab[code].len); | ||
796 : | return dc_lum_tab[code].code; | ||
797 : | edgomez | 78 | |
798 : | Isibaar | 3 | } |
799 : | |||
800 : | |||
801 : | edgomez | 195 | int |
802 : | get_dc_size_chrom(Bitstream * bs) | ||
803 : | Isibaar | 3 | { |
804 : | edgomez | 78 | |
805 : | Isibaar | 3 | uint32_t code, i; |
806 : | edgomez | 195 | |
807 : | Isibaar | 3 | code = BitstreamShowBits(bs, 12); |
808 : | |||
809 : | edgomez | 195 | for (i = 12; i > 2; i--) { |
810 : | if (code == 1) { | ||
811 : | Isibaar | 3 | BitstreamSkip(bs, i); |
812 : | return i; | ||
813 : | } | ||
814 : | code >>= 1; | ||
815 : | } | ||
816 : | |||
817 : | return 3 - BitstreamGetBits(bs, 2); | ||
818 : | edgomez | 78 | |
819 : | Isibaar | 3 | } |
820 : | |||
821 : | edgomez | 195 | void |
822 : | get_intra_block(Bitstream * bs, | ||
823 : | int16_t * block, | ||
824 : | int direction, | ||
825 : | int coeff) | ||
826 : | Isibaar | 3 | { |
827 : | edgomez | 78 | |
828 : | edgomez | 195 | const uint16_t *scan = scan_tables[direction]; |
829 : | chl | 530 | int level, run, last; |
830 : | Isibaar | 3 | |
831 : | edgomez | 195 | do { |
832 : | Isibaar | 3 | level = get_coeff(bs, &run, &last, 1, 0); |
833 : | edgomez | 195 | if (run == -1) { |
834 : | suxen_drol | 721 | DPRINTF(DPRINTF_ERROR,"fatal: invalid run"); |
835 : | Isibaar | 3 | break; |
836 : | } | ||
837 : | coeff += run; | ||
838 : | edgomez | 195 | block[scan[coeff]] = level; |
839 : | suxen_drol | 252 | |
840 : | DPRINTF(DPRINTF_COEFF,"block[%i] %i", scan[coeff], level); | ||
841 : | //DPRINTF(DPRINTF_COEFF,"block[%i] %i %08x", scan[coeff], level, BitstreamShowBits(bs, 32)); | ||
842 : | |||
843 : | edgomez | 195 | if (level < -127 || level > 127) { |
844 : | suxen_drol | 721 | DPRINTF(DPRINTF_ERROR,"warning: intra_overflow %i", level); |
845 : | Isibaar | 3 | } |
846 : | coeff++; | ||
847 : | } while (!last); | ||
848 : | edgomez | 78 | |
849 : | Isibaar | 3 | } |
850 : | |||
851 : | edgomez | 195 | void |
852 : | get_inter_block(Bitstream * bs, | ||
853 : | h | 543 | int16_t * block, |
854 : | int direction) | ||
855 : | Isibaar | 3 | { |
856 : | edgomez | 78 | |
857 : | h | 543 | const uint16_t *scan = scan_tables[direction]; |
858 : | Isibaar | 3 | int p; |
859 : | int level; | ||
860 : | int run; | ||
861 : | int last; | ||
862 : | |||
863 : | p = 0; | ||
864 : | edgomez | 195 | do { |
865 : | Isibaar | 3 | level = get_coeff(bs, &run, &last, 0, 0); |
866 : | edgomez | 195 | if (run == -1) { |
867 : | suxen_drol | 721 | DPRINTF(DPRINTF_ERROR,"fatal: invalid run"); |
868 : | Isibaar | 3 | break; |
869 : | } | ||
870 : | p += run; | ||
871 : | chenm001 | 161 | |
872 : | edgomez | 195 | block[scan[p]] = level; |
873 : | suxen_drol | 252 | |
874 : | DPRINTF(DPRINTF_COEFF,"block[%i] %i", scan[p], level); | ||
875 : | // DPRINTF(DPRINTF_COEFF,"block[%i] %i %08x", scan[p], level, BitstreamShowBits(bs, 32)); | ||
876 : | |||
877 : | edgomez | 195 | if (level < -127 || level > 127) { |
878 : | suxen_drol | 721 | DPRINTF(DPRINTF_ERROR,"warning: inter overflow %i", level); |
879 : | Isibaar | 3 | } |
880 : | p++; | ||
881 : | } while (!last); | ||
882 : | edgomez | 78 | |
883 : | Isibaar | 3 | } |
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