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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 | 769 | * 04.01.2003 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 : | chl | 769 | #include <stdio.h> |
53 : | Isibaar | 100 | #include <stdlib.h> |
54 : | Isibaar | 3 | #include "../portab.h" |
55 : | suxen_drol | 760 | #include "../global.h" |
56 : | Isibaar | 3 | #include "bitstream.h" |
57 : | #include "zigzag.h" | ||
58 : | #include "vlc_codes.h" | ||
59 : | Isibaar | 100 | #include "mbcoding.h" |
60 : | Isibaar | 3 | |
61 : | #include "../utils/mbfunctions.h" | ||
62 : | |||
63 : | suxen_drol | 736 | VLC intra_table[4*2048*64]; |
64 : | VLC inter_table[4*2048*64]; | ||
65 : | Isibaar | 100 | |
66 : | Isibaar | 114 | VLC DCT3Dintra[4096]; |
67 : | VLC DCT3Dinter[4096]; | ||
68 : | Isibaar | 3 | |
69 : | chl | 619 | /* not really MB related, but VLCs are only available here */ |
70 : | suxen_drol | 622 | void bs_put_spritetrajectory(Bitstream * bs, const int val) |
71 : | chl | 619 | { |
72 : | const int code = sprite_trajectory_code[val+16384].code; | ||
73 : | const int len = sprite_trajectory_code[val+16384].len; | ||
74 : | const int code2 = sprite_trajectory_len[len].code; | ||
75 : | const int len2 = sprite_trajectory_len[len].len; | ||
76 : | |||
77 : | // printf("GMC=%d Code/Len = %d / %d ",val, code,len); | ||
78 : | // printf("Code2 / Len2 = %d / %d \n",code2,len2); | ||
79 : | |||
80 : | BitstreamPutBits(bs, code2, len2); | ||
81 : | if (len) BitstreamPutBits(bs, code, len); | ||
82 : | } | ||
83 : | |||
84 : | suxen_drol | 631 | int bs_get_spritetrajectory(Bitstream * bs) |
85 : | { | ||
86 : | int i; | ||
87 : | for (i = 0; i < 12; i++) | ||
88 : | { | ||
89 : | if (BitstreamShowBits(bs, sprite_trajectory_len[i].len) == sprite_trajectory_len[i].code) | ||
90 : | { | ||
91 : | BitstreamSkip(bs, sprite_trajectory_len[i].len); | ||
92 : | return i; | ||
93 : | } | ||
94 : | } | ||
95 : | return -1; | ||
96 : | } | ||
97 : | chl | 619 | |
98 : | edgomez | 195 | void |
99 : | init_vlc_tables(void) | ||
100 : | Isibaar | 3 | { |
101 : | edgomez | 78 | |
102 : | Isibaar | 3 | int32_t k, l, i, intra, last; |
103 : | VLC *vlc[2]; | ||
104 : | VLC **coeff_ptr; | ||
105 : | VLC *vlc1, *vlc2; | ||
106 : | |||
107 : | vlc1 = DCT3Dintra; | ||
108 : | vlc2 = DCT3Dinter; | ||
109 : | edgomez | 195 | |
110 : | Isibaar | 100 | vlc[0] = intra_table; |
111 : | vlc[1] = inter_table; | ||
112 : | edgomez | 195 | |
113 : | Isibaar | 100 | // generate encoding vlc lookup tables |
114 : | Isibaar | 153 | // the lookup table idea is taken from the excellent fame project by Vivien Chapellier |
115 : | edgomez | 195 | for (i = 0; i < 4; i++) { |
116 : | Isibaar | 3 | intra = i % 2; |
117 : | Isibaar | 100 | last = i / 2; |
118 : | Isibaar | 3 | |
119 : | Isibaar | 100 | coeff_ptr = coeff_vlc[last + 2 * intra]; |
120 : | edgomez | 195 | |
121 : | for (k = -2047; k < 2048; k++) { // level | ||
122 : | Isibaar | 100 | int8_t *max_level_ptr = max_level[last + 2 * intra]; |
123 : | int8_t *max_run_ptr = max_run[last + 2 * intra]; | ||
124 : | edgomez | 195 | |
125 : | for (l = 0; l < 64; l++) { // run | ||
126 : | Isibaar | 35 | int32_t level = k; |
127 : | Isibaar | 209 | ptr_t run = l; |
128 : | edgomez | 195 | |
129 : | if ((abs(level) <= max_level_ptr[run]) && (run <= (uint32_t) max_run_ptr[abs(level)])) { // level < max_level and run < max_run | ||
130 : | |||
131 : | vlc[intra]->code = 0; | ||
132 : | vlc[intra]->len = 0; | ||
133 : | goto loop_end; | ||
134 : | } else { | ||
135 : | if (level > 0) // correct level | ||
136 : | Isibaar | 3 | level -= max_level_ptr[run]; |
137 : | else | ||
138 : | level += max_level_ptr[run]; | ||
139 : | Isibaar | 35 | |
140 : | edgomez | 195 | if ((abs(level) <= max_level_ptr[run]) && |
141 : | (run <= (uint32_t) max_run_ptr[abs(level)])) { | ||
142 : | |||
143 : | Isibaar | 100 | vlc[intra]->code = 0x06; |
144 : | vlc[intra]->len = 8; | ||
145 : | goto loop_end; | ||
146 : | } | ||
147 : | Isibaar | 3 | |
148 : | edgomez | 195 | if (level > 0) // still here? |
149 : | level += max_level_ptr[run]; // restore level | ||
150 : | Isibaar | 100 | else |
151 : | level -= max_level_ptr[run]; | ||
152 : | |||
153 : | edgomez | 195 | run -= max_run_ptr[abs(level)] + 1; // and change run |
154 : | Isibaar | 100 | |
155 : | edgomez | 195 | if ((abs(level) <= max_level_ptr[run]) && |
156 : | (run <= (uint32_t) max_run_ptr[abs(level)])) { | ||
157 : | |||
158 : | Isibaar | 100 | vlc[intra]->code = 0x0e; |
159 : | vlc[intra]->len = 9; | ||
160 : | goto loop_end; | ||
161 : | Isibaar | 3 | } |
162 : | Isibaar | 100 | run += max_run_ptr[abs(level)] + 1; |
163 : | Isibaar | 3 | } |
164 : | Isibaar | 100 | |
165 : | edgomez | 195 | vlc[intra]->code = |
166 : | (uint32_t) ((l << 14) | (0x1e + last) << 20) | (1 << 13) | | ||
167 : | ((k & 0xfff) << 1) | 1; | ||
168 : | Isibaar | 100 | |
169 : | vlc[intra]->len = 30; | ||
170 : | Isibaar | 3 | vlc[intra]++; |
171 : | Isibaar | 100 | continue; |
172 : | |||
173 : | edgomez | 195 | loop_end: |
174 : | if (level != 0) { | ||
175 : | vlc[intra]->code = | ||
176 : | (vlc[intra]-> | ||
177 : | code << (coeff_ptr[run][abs(level) - 1].len + | ||
178 : | 1)) | (coeff_ptr[run][abs(level) - | ||
179 : | 1].code << 1); | ||
180 : | vlc[intra]->len = | ||
181 : | (coeff_ptr[run][abs(level) - 1].len + 1) + | ||
182 : | vlc[intra]->len; | ||
183 : | Isibaar | 100 | |
184 : | edgomez | 195 | if (level < 0) |
185 : | Isibaar | 100 | vlc[intra]->code += 1; |
186 : | } | ||
187 : | |||
188 : | vlc[intra]++; | ||
189 : | Isibaar | 3 | } |
190 : | } | ||
191 : | } | ||
192 : | edgomez | 78 | |
193 : | edgomez | 195 | for (i = 0; i < 4096; i++) { |
194 : | if (i >= 512) { | ||
195 : | Isibaar | 3 | *vlc1 = DCT3Dtab3[(i >> 5) - 16]; |
196 : | *vlc2 = DCT3Dtab0[(i >> 5) - 16]; | ||
197 : | edgomez | 195 | } else if (i >= 128) { |
198 : | Isibaar | 3 | *vlc1 = DCT3Dtab4[(i >> 2) - 32]; |
199 : | *vlc2 = DCT3Dtab1[(i >> 2) - 32]; | ||
200 : | edgomez | 195 | } else if (i >= 8) { |
201 : | Isibaar | 3 | *vlc1 = DCT3Dtab5[i - 8]; |
202 : | *vlc2 = DCT3Dtab2[i - 8]; | ||
203 : | edgomez | 195 | } else { |
204 : | Isibaar | 3 | *vlc1 = ERRtab[i]; |
205 : | *vlc2 = ERRtab[i]; | ||
206 : | } | ||
207 : | |||
208 : | vlc1++; | ||
209 : | vlc2++; | ||
210 : | } | ||
211 : | DCT3D[0] = DCT3Dinter; | ||
212 : | DCT3D[1] = DCT3Dintra; | ||
213 : | |||
214 : | chl | 619 | |
215 : | /* init sprite_trajectory tables */ | ||
216 : | /* even if GMC is not specified (it might be used later...) */ | ||
217 : | |||
218 : | sprite_trajectory_code[0+16384].code = 0; | ||
219 : | sprite_trajectory_code[0+16384].len = 0; | ||
220 : | for (k=0;k<14;k++) | ||
221 : | { | ||
222 : | int limit = (1<<k); | ||
223 : | |||
224 : | for (i=-(2*limit-1); i<= -limit; i++) | ||
225 : | { | ||
226 : | sprite_trajectory_code[i+16384].code = (2*limit-1)+i; | ||
227 : | sprite_trajectory_code[i+16384].len = k+1; | ||
228 : | } | ||
229 : | |||
230 : | for (i=limit; i<= 2*limit-1; i++) | ||
231 : | { | ||
232 : | sprite_trajectory_code[i+16384].code = i; | ||
233 : | sprite_trajectory_code[i+16384].len = k+1; | ||
234 : | } | ||
235 : | } | ||
236 : | Isibaar | 3 | } |
237 : | |||
238 : | edgomez | 195 | static __inline void |
239 : | CodeVector(Bitstream * bs, | ||
240 : | int32_t value, | ||
241 : | int32_t f_code, | ||
242 : | Statistics * pStat) | ||
243 : | Isibaar | 3 | { |
244 : | edgomez | 78 | |
245 : | Isibaar | 3 | const int scale_factor = 1 << (f_code - 1); |
246 : | const int cmp = scale_factor << 5; | ||
247 : | |||
248 : | edgomez | 195 | if (value < (-1 * cmp)) |
249 : | Isibaar | 3 | value += 64 * scale_factor; |
250 : | edgomez | 195 | |
251 : | if (value > (cmp - 1)) | ||
252 : | Isibaar | 3 | value -= 64 * scale_factor; |
253 : | |||
254 : | edgomez | 78 | pStat->iMvSum += value * value; |
255 : | pStat->iMvCount++; | ||
256 : | Isibaar | 3 | |
257 : | edgomez | 78 | if (value == 0) { |
258 : | edgomez | 195 | BitstreamPutBits(bs, mb_motion_table[32].code, |
259 : | mb_motion_table[32].len); | ||
260 : | edgomez | 78 | } else { |
261 : | Isibaar | 3 | uint16_t length, code, mv_res, sign; |
262 : | edgomez | 195 | |
263 : | Isibaar | 3 | length = 16 << f_code; |
264 : | f_code--; | ||
265 : | edgomez | 195 | |
266 : | Isibaar | 3 | sign = (value < 0); |
267 : | |||
268 : | edgomez | 195 | if (value >= length) |
269 : | Isibaar | 3 | value -= 2 * length; |
270 : | edgomez | 195 | else if (value < -length) |
271 : | Isibaar | 3 | value += 2 * length; |
272 : | |||
273 : | edgomez | 195 | if (sign) |
274 : | Isibaar | 3 | value = -value; |
275 : | |||
276 : | value--; | ||
277 : | mv_res = value & ((1 << f_code) - 1); | ||
278 : | code = ((value - mv_res) >> f_code) + 1; | ||
279 : | |||
280 : | edgomez | 195 | if (sign) |
281 : | Isibaar | 3 | code = -code; |
282 : | |||
283 : | code += 32; | ||
284 : | edgomez | 195 | BitstreamPutBits(bs, mb_motion_table[code].code, |
285 : | mb_motion_table[code].len); | ||
286 : | |||
287 : | if (f_code) | ||
288 : | Isibaar | 3 | BitstreamPutBits(bs, mv_res, f_code); |
289 : | edgomez | 78 | } |
290 : | |||
291 : | Isibaar | 3 | } |
292 : | |||
293 : | |||
294 : | edgomez | 195 | static __inline void |
295 : | CodeCoeff(Bitstream * bs, | ||
296 : | const int16_t qcoeff[64], | ||
297 : | VLC * table, | ||
298 : | const uint16_t * zigzag, | ||
299 : | uint16_t intra) | ||
300 : | edgomez | 78 | { |
301 : | |||
302 : | Isibaar | 3 | uint32_t j, last; |
303 : | short v; | ||
304 : | VLC *vlc; | ||
305 : | edgomez | 195 | |
306 : | Isibaar | 3 | j = intra; |
307 : | Isibaar | 116 | last = intra; |
308 : | Isibaar | 3 | |
309 : | edgomez | 195 | while (j < 64 && (v = qcoeff[zigzag[j]]) == 0) |
310 : | j++; | ||
311 : | |||
312 : | Isibaar | 3 | do { |
313 : | Isibaar | 153 | vlc = table + 64 * 2047 + (v << 6) + j - last; |
314 : | Isibaar | 116 | last = ++j; |
315 : | Isibaar | 153 | |
316 : | // count zeroes | ||
317 : | edgomez | 195 | while (j < 64 && (v = qcoeff[zigzag[j]]) == 0) |
318 : | j++; | ||
319 : | |||
320 : | Isibaar | 3 | // write code |
321 : | edgomez | 195 | if (j != 64) { |
322 : | Isibaar | 3 | BitstreamPutBits(bs, vlc->code, vlc->len); |
323 : | } else { | ||
324 : | Isibaar | 153 | vlc += 64 * 4095; |
325 : | Isibaar | 3 | BitstreamPutBits(bs, vlc->code, vlc->len); |
326 : | break; | ||
327 : | } | ||
328 : | edgomez | 195 | } while (1); |
329 : | edgomez | 78 | |
330 : | Isibaar | 3 | } |
331 : | |||
332 : | |||
333 : | chl | 530 | static __inline void |
334 : | chl | 619 | CodeBlockIntra(const FRAMEINFO * const frame, |
335 : | edgomez | 195 | const MACROBLOCK * pMB, |
336 : | int16_t qcoeff[6 * 64], | ||
337 : | edgomez | 78 | Bitstream * bs, |
338 : | Statistics * pStat) | ||
339 : | Isibaar | 3 | { |
340 : | edgomez | 78 | |
341 : | Isibaar | 3 | uint32_t i, mcbpc, cbpy, bits; |
342 : | |||
343 : | cbpy = pMB->cbp >> 2; | ||
344 : | |||
345 : | edgomez | 78 | // write mcbpc |
346 : | edgomez | 195 | if (frame->coding_type == I_VOP) { |
347 : | edgomez | 78 | mcbpc = ((pMB->mode >> 1) & 3) | ((pMB->cbp & 3) << 2); |
348 : | edgomez | 195 | BitstreamPutBits(bs, mcbpc_intra_tab[mcbpc].code, |
349 : | mcbpc_intra_tab[mcbpc].len); | ||
350 : | } else { | ||
351 : | edgomez | 78 | mcbpc = (pMB->mode & 7) | ((pMB->cbp & 3) << 3); |
352 : | edgomez | 195 | BitstreamPutBits(bs, mcbpc_inter_tab[mcbpc].code, |
353 : | mcbpc_inter_tab[mcbpc].len); | ||
354 : | Isibaar | 28 | } |
355 : | Isibaar | 3 | |
356 : | // ac prediction flag | ||
357 : | edgomez | 195 | if (pMB->acpred_directions[0]) |
358 : | edgomez | 78 | BitstreamPutBits(bs, 1, 1); |
359 : | Isibaar | 3 | else |
360 : | edgomez | 78 | BitstreamPutBits(bs, 0, 1); |
361 : | Isibaar | 3 | |
362 : | edgomez | 78 | // write cbpy |
363 : | edgomez | 195 | BitstreamPutBits(bs, cbpy_tab[cbpy].code, cbpy_tab[cbpy].len); |
364 : | Isibaar | 3 | |
365 : | // write dquant | ||
366 : | edgomez | 195 | if (pMB->mode == MODE_INTRA_Q) |
367 : | Isibaar | 3 | BitstreamPutBits(bs, pMB->dquant, 2); |
368 : | |||
369 : | h | 69 | // write interlacing |
370 : | edgomez | 195 | if (frame->global_flags & XVID_INTERLACING) { |
371 : | h | 69 | BitstreamPutBit(bs, pMB->field_dct); |
372 : | } | ||
373 : | Isibaar | 3 | // code block coeffs |
374 : | edgomez | 195 | for (i = 0; i < 6; i++) { |
375 : | if (i < 4) | ||
376 : | BitstreamPutBits(bs, dcy_tab[qcoeff[i * 64 + 0] + 255].code, | ||
377 : | dcy_tab[qcoeff[i * 64 + 0] + 255].len); | ||
378 : | Isibaar | 3 | else |
379 : | edgomez | 195 | BitstreamPutBits(bs, dcc_tab[qcoeff[i * 64 + 0] + 255].code, |
380 : | dcc_tab[qcoeff[i * 64 + 0] + 255].len); | ||
381 : | |||
382 : | if (pMB->cbp & (1 << (5 - i))) { | ||
383 : | h | 543 | const uint16_t *scan_table = |
384 : | frame->global_flags & XVID_ALTERNATESCAN ? | ||
385 : | scan_tables[2] : scan_tables[pMB->acpred_directions[i]]; | ||
386 : | |||
387 : | Isibaar | 3 | bits = BitstreamPos(bs); |
388 : | |||
389 : | h | 543 | CodeCoeff(bs, &qcoeff[i * 64], intra_table, scan_table, 1); |
390 : | Isibaar | 3 | |
391 : | bits = BitstreamPos(bs) - bits; | ||
392 : | pStat->iTextBits += bits; | ||
393 : | } | ||
394 : | } | ||
395 : | edgomez | 78 | |
396 : | Isibaar | 3 | } |
397 : | |||
398 : | |||
399 : | edgomez | 195 | static void |
400 : | chl | 619 | CodeBlockInter(const FRAMEINFO * const frame, |
401 : | edgomez | 195 | const MACROBLOCK * pMB, |
402 : | int16_t qcoeff[6 * 64], | ||
403 : | edgomez | 78 | Bitstream * bs, |
404 : | Statistics * pStat) | ||
405 : | Isibaar | 3 | { |
406 : | edgomez | 78 | |
407 : | Isibaar | 3 | int32_t i; |
408 : | uint32_t bits, mcbpc, cbpy; | ||
409 : | |||
410 : | edgomez | 78 | mcbpc = (pMB->mode & 7) | ((pMB->cbp & 3) << 3); |
411 : | Isibaar | 3 | cbpy = 15 - (pMB->cbp >> 2); |
412 : | |||
413 : | // write mcbpc | ||
414 : | edgomez | 195 | BitstreamPutBits(bs, mcbpc_inter_tab[mcbpc].code, |
415 : | mcbpc_inter_tab[mcbpc].len); | ||
416 : | Isibaar | 3 | |
417 : | chl | 619 | if ( (frame->coding_type == S_VOP) && (pMB->mode == MODE_INTER || pMB->mode == MODE_INTER_Q) ) |
418 : | { | ||
419 : | chl | 769 | /* decision on GMC is done in encoder.c now */ |
420 : | BitstreamPutBit(bs, pMB->mcsel); // mcsel: '0'=local motion, '1'=GMC | ||
421 : | chl | 619 | } |
422 : | |||
423 : | Isibaar | 3 | // write cbpy |
424 : | BitstreamPutBits(bs, cbpy_tab[cbpy].code, cbpy_tab[cbpy].len); | ||
425 : | |||
426 : | // write dquant | ||
427 : | edgomez | 195 | if (pMB->mode == MODE_INTER_Q) |
428 : | Isibaar | 3 | BitstreamPutBits(bs, pMB->dquant, 2); |
429 : | edgomez | 195 | |
430 : | h | 69 | // interlacing |
431 : | edgomez | 195 | if (frame->global_flags & XVID_INTERLACING) { |
432 : | h | 388 | if (pMB->cbp) { |
433 : | BitstreamPutBit(bs, pMB->field_dct); | ||
434 : | suxen_drol | 721 | DPRINTF(DPRINTF_MB,"codep: field_dct: %i", pMB->field_dct); |
435 : | h | 388 | } |
436 : | h | 69 | |
437 : | // if inter block, write field ME flag | ||
438 : | edgomez | 195 | if (pMB->mode == MODE_INTER || pMB->mode == MODE_INTER_Q) { |
439 : | h | 69 | BitstreamPutBit(bs, pMB->field_pred); |
440 : | suxen_drol | 721 | DPRINTF(DPRINTF_MB,"codep: field_pred: %i", pMB->field_pred); |
441 : | h | 69 | |
442 : | // write field prediction references | ||
443 : | edgomez | 195 | if (pMB->field_pred) { |
444 : | h | 69 | BitstreamPutBit(bs, pMB->field_for_top); |
445 : | BitstreamPutBit(bs, pMB->field_for_bot); | ||
446 : | } | ||
447 : | } | ||
448 : | } | ||
449 : | chl | 619 | // code motion vector(s) if motion is local |
450 : | chl | 769 | if (!pMB->mcsel) |
451 : | chl | 619 | for (i = 0; i < (pMB->mode == MODE_INTER4V ? 4 : 1); i++) { |
452 : | CodeVector(bs, pMB->pmvs[i].x, frame->fcode, pStat); | ||
453 : | CodeVector(bs, pMB->pmvs[i].y, frame->fcode, pStat); | ||
454 : | } | ||
455 : | Isibaar | 3 | |
456 : | bits = BitstreamPos(bs); | ||
457 : | edgomez | 195 | |
458 : | Isibaar | 3 | // code block coeffs |
459 : | edgomez | 195 | for (i = 0; i < 6; i++) |
460 : | if (pMB->cbp & (1 << (5 - i))) | ||
461 : | h | 543 | { |
462 : | const uint16_t *scan_table = | ||
463 : | frame->global_flags & XVID_ALTERNATESCAN ? | ||
464 : | scan_tables[2] : scan_tables[0]; | ||
465 : | Isibaar | 3 | |
466 : | h | 543 | CodeCoeff(bs, &qcoeff[i * 64], inter_table, scan_table, 0); |
467 : | } | ||
468 : | |||
469 : | Isibaar | 3 | bits = BitstreamPos(bs) - bits; |
470 : | pStat->iTextBits += bits; | ||
471 : | } | ||
472 : | |||
473 : | |||
474 : | edgomez | 195 | void |
475 : | chl | 619 | MBCoding(const FRAMEINFO * const frame, |
476 : | edgomez | 195 | MACROBLOCK * pMB, |
477 : | int16_t qcoeff[6 * 64], | ||
478 : | Bitstream * bs, | ||
479 : | Statistics * pStat) | ||
480 : | Isibaar | 3 | { |
481 : | chl | 619 | if (frame->coding_type != I_VOP) |
482 : | BitstreamPutBit(bs, 0); // not_coded | ||
483 : | |||
484 : | chl | 335 | if (pMB->mode == MODE_INTRA || pMB->mode == MODE_INTRA_Q) |
485 : | suxen_drol | 136 | CodeBlockIntra(frame, pMB, qcoeff, bs, pStat); |
486 : | Isibaar | 3 | else |
487 : | suxen_drol | 136 | CodeBlockInter(frame, pMB, qcoeff, bs, pStat); |
488 : | edgomez | 78 | |
489 : | Isibaar | 3 | } |
490 : | |||
491 : | chl | 530 | /* |
492 : | // moved to mbcoding.h so that in can be 'static __inline' | ||
493 : | chl | 347 | void |
494 : | MBSkip(Bitstream * bs) | ||
495 : | { | ||
496 : | BitstreamPutBit(bs, 1); // not coded | ||
497 : | } | ||
498 : | chl | 530 | */ |
499 : | chl | 347 | |
500 : | suxen_drol | 118 | /*************************************************************** |
501 : | * bframe encoding start | ||
502 : | ***************************************************************/ | ||
503 : | Isibaar | 3 | |
504 : | suxen_drol | 118 | /* |
505 : | mbtype | ||
506 : | 0 1b direct(h263) mvdb | ||
507 : | 1 01b interpolate mc+q dbquant, mvdf, mvdb | ||
508 : | 2 001b backward mc+q dbquant, mvdb | ||
509 : | 3 0001b forward mc+q dbquant, mvdf | ||
510 : | */ | ||
511 : | |||
512 : | chl | 530 | static __inline void |
513 : | edgomez | 195 | put_bvop_mbtype(Bitstream * bs, |
514 : | int value) | ||
515 : | suxen_drol | 118 | { |
516 : | edgomez | 195 | switch (value) { |
517 : | chl | 530 | case MODE_FORWARD: |
518 : | BitstreamPutBit(bs, 0); | ||
519 : | case MODE_BACKWARD: | ||
520 : | BitstreamPutBit(bs, 0); | ||
521 : | case MODE_INTERPOLATE: | ||
522 : | BitstreamPutBit(bs, 0); | ||
523 : | case MODE_DIRECT: | ||
524 : | BitstreamPutBit(bs, 1); | ||
525 : | default: | ||
526 : | break; | ||
527 : | suxen_drol | 118 | } |
528 : | } | ||
529 : | |||
530 : | /* | ||
531 : | dbquant | ||
532 : | -2 10b | ||
533 : | 0 0b | ||
534 : | +2 11b | ||
535 : | */ | ||
536 : | |||
537 : | chl | 530 | static __inline void |
538 : | edgomez | 195 | put_bvop_dbquant(Bitstream * bs, |
539 : | int value) | ||
540 : | suxen_drol | 118 | { |
541 : | edgomez | 195 | switch (value) { |
542 : | case 0: | ||
543 : | BitstreamPutBit(bs, 0); | ||
544 : | return; | ||
545 : | suxen_drol | 118 | |
546 : | edgomez | 195 | case -2: |
547 : | BitstreamPutBit(bs, 1); | ||
548 : | BitstreamPutBit(bs, 0); | ||
549 : | return; | ||
550 : | suxen_drol | 118 | |
551 : | edgomez | 195 | case 2: |
552 : | BitstreamPutBit(bs, 1); | ||
553 : | BitstreamPutBit(bs, 1); | ||
554 : | return; | ||
555 : | |||
556 : | default:; // invalid | ||
557 : | suxen_drol | 118 | } |
558 : | } | ||
559 : | |||
560 : | |||
561 : | |||
562 : | edgomez | 195 | void |
563 : | MBCodingBVOP(const MACROBLOCK * mb, | ||
564 : | const int16_t qcoeff[6 * 64], | ||
565 : | const int32_t fcode, | ||
566 : | const int32_t bcode, | ||
567 : | Bitstream * bs, | ||
568 : | h | 543 | Statistics * pStat, |
569 : | int direction) | ||
570 : | suxen_drol | 118 | { |
571 : | chl | 530 | int vcode = fcode; |
572 : | unsigned int i; | ||
573 : | suxen_drol | 118 | |
574 : | /* ------------------------------------------------------------------ | ||
575 : | chl | 313 | when a block is skipped it is decoded DIRECT(0,0) |
576 : | hence is interpolated from forward & backward frames | ||
577 : | suxen_drol | 118 | ------------------------------------------------------------------ */ |
578 : | |||
579 : | chl | 313 | if (mb->mode == MODE_DIRECT_NONE_MV) { |
580 : | edgomez | 195 | BitstreamPutBit(bs, 1); // skipped |
581 : | suxen_drol | 118 | return; |
582 : | } | ||
583 : | |||
584 : | BitstreamPutBit(bs, 0); // not skipped | ||
585 : | |||
586 : | edgomez | 195 | if (mb->cbp == 0) { |
587 : | BitstreamPutBit(bs, 1); // cbp == 0 | ||
588 : | } else { | ||
589 : | BitstreamPutBit(bs, 0); // cbp == xxx | ||
590 : | suxen_drol | 118 | } |
591 : | |||
592 : | put_bvop_mbtype(bs, mb->mode); | ||
593 : | |||
594 : | edgomez | 195 | if (mb->cbp) { |
595 : | suxen_drol | 118 | BitstreamPutBits(bs, mb->cbp, 6); |
596 : | } | ||
597 : | |||
598 : | edgomez | 195 | if (mb->mode != MODE_DIRECT && mb->cbp != 0) { |
599 : | put_bvop_dbquant(bs, 0); // todo: mb->dquant = 0 | ||
600 : | suxen_drol | 118 | } |
601 : | |||
602 : | chl | 530 | switch (mb->mode) { |
603 : | case MODE_INTERPOLATE: | ||
604 : | CodeVector(bs, mb->pmvs[1].x, vcode, pStat); //forward vector of interpolate mode | ||
605 : | CodeVector(bs, mb->pmvs[1].y, vcode, pStat); | ||
606 : | case MODE_BACKWARD: | ||
607 : | vcode = bcode; | ||
608 : | case MODE_FORWARD: | ||
609 : | CodeVector(bs, mb->pmvs[0].x, vcode, pStat); | ||
610 : | CodeVector(bs, mb->pmvs[0].y, vcode, pStat); | ||
611 : | break; | ||
612 : | case MODE_DIRECT: | ||
613 : | CodeVector(bs, mb->pmvs[3].x, 1, pStat); // fcode is always 1 for delta vector | ||
614 : | CodeVector(bs, mb->pmvs[3].y, 1, pStat); // prediction is always (0,0) | ||
615 : | default: break; | ||
616 : | suxen_drol | 118 | } |
617 : | |||
618 : | edgomez | 195 | for (i = 0; i < 6; i++) { |
619 : | if (mb->cbp & (1 << (5 - i))) { | ||
620 : | h | 543 | CodeCoeff(bs, &qcoeff[i * 64], inter_table, scan_tables[direction], 0); |
621 : | suxen_drol | 118 | } |
622 : | edgomez | 195 | } |
623 : | suxen_drol | 118 | } |
624 : | |||
625 : | |||
626 : | |||
627 : | Isibaar | 3 | /*************************************************************** |
628 : | edgomez | 15 | * decoding stuff starts here * |
629 : | ***************************************************************/ | ||
630 : | Isibaar | 3 | |
631 : | suxen_drol | 248 | |
632 : | // for IVOP addbits == 0 | ||
633 : | // for PVOP addbits == fcode - 1 | ||
634 : | // for BVOP addbits == max(fcode,bcode) - 1 | ||
635 : | // returns true or false | ||
636 : | int | ||
637 : | check_resync_marker(Bitstream * bs, int addbits) | ||
638 : | { | ||
639 : | uint32_t nbits; | ||
640 : | uint32_t code; | ||
641 : | uint32_t nbitsresyncmarker = NUMBITS_VP_RESYNC_MARKER + addbits; | ||
642 : | |||
643 : | nbits = BitstreamNumBitsToByteAlign(bs); | ||
644 : | code = BitstreamShowBits(bs, nbits); | ||
645 : | |||
646 : | if (code == (((uint32_t)1 << (nbits - 1)) - 1)) | ||
647 : | { | ||
648 : | return BitstreamShowBitsFromByteAlign(bs, nbitsresyncmarker) == RESYNC_MARKER; | ||
649 : | } | ||
650 : | |||
651 : | return 0; | ||
652 : | } | ||
653 : | |||
654 : | |||
655 : | |||
656 : | edgomez | 195 | int |
657 : | get_mcbpc_intra(Bitstream * bs) | ||
658 : | Isibaar | 3 | { |
659 : | edgomez | 78 | |
660 : | Isibaar | 3 | uint32_t index; |
661 : | edgomez | 195 | |
662 : | suxen_drol | 248 | index = BitstreamShowBits(bs, 9); |
663 : | Isibaar | 3 | index >>= 3; |
664 : | |||
665 : | BitstreamSkip(bs, mcbpc_intra_table[index].len); | ||
666 : | edgomez | 78 | |
667 : | Isibaar | 3 | return mcbpc_intra_table[index].code; |
668 : | edgomez | 78 | |
669 : | Isibaar | 3 | } |
670 : | |||
671 : | edgomez | 195 | int |
672 : | get_mcbpc_inter(Bitstream * bs) | ||
673 : | Isibaar | 3 | { |
674 : | edgomez | 78 | |
675 : | Isibaar | 3 | uint32_t index; |
676 : | suxen_drol | 248 | |
677 : | suxen_drol | 760 | index = MIN(BitstreamShowBits(bs, 9), 256); |
678 : | edgomez | 195 | |
679 : | BitstreamSkip(bs, mcbpc_inter_table[index].len); | ||
680 : | edgomez | 78 | |
681 : | Isibaar | 3 | return mcbpc_inter_table[index].code; |
682 : | edgomez | 78 | |
683 : | Isibaar | 3 | } |
684 : | |||
685 : | edgomez | 195 | int |
686 : | get_cbpy(Bitstream * bs, | ||
687 : | int intra) | ||
688 : | Isibaar | 3 | { |
689 : | edgomez | 78 | |
690 : | Isibaar | 3 | int cbpy; |
691 : | uint32_t index = BitstreamShowBits(bs, 6); | ||
692 : | |||
693 : | BitstreamSkip(bs, cbpy_table[index].len); | ||
694 : | cbpy = cbpy_table[index].code; | ||
695 : | |||
696 : | edgomez | 195 | if (!intra) |
697 : | Isibaar | 3 | cbpy = 15 - cbpy; |
698 : | |||
699 : | return cbpy; | ||
700 : | edgomez | 78 | |
701 : | Isibaar | 3 | } |
702 : | |||
703 : | chl | 530 | static __inline int |
704 : | edgomez | 195 | get_mv_data(Bitstream * bs) |
705 : | Isibaar | 3 | { |
706 : | edgomez | 78 | |
707 : | Isibaar | 3 | uint32_t index; |
708 : | |||
709 : | edgomez | 195 | if (BitstreamGetBit(bs)) |
710 : | Isibaar | 3 | return 0; |
711 : | edgomez | 195 | |
712 : | Isibaar | 3 | index = BitstreamShowBits(bs, 12); |
713 : | |||
714 : | edgomez | 195 | if (index >= 512) { |
715 : | Isibaar | 3 | index = (index >> 8) - 2; |
716 : | BitstreamSkip(bs, TMNMVtab0[index].len); | ||
717 : | return TMNMVtab0[index].code; | ||
718 : | } | ||
719 : | edgomez | 195 | |
720 : | if (index >= 128) { | ||
721 : | Isibaar | 3 | index = (index >> 2) - 32; |
722 : | BitstreamSkip(bs, TMNMVtab1[index].len); | ||
723 : | return TMNMVtab1[index].code; | ||
724 : | } | ||
725 : | |||
726 : | edgomez | 195 | index -= 4; |
727 : | Isibaar | 3 | |
728 : | BitstreamSkip(bs, TMNMVtab2[index].len); | ||
729 : | return TMNMVtab2[index].code; | ||
730 : | edgomez | 78 | |
731 : | Isibaar | 3 | } |
732 : | |||
733 : | edgomez | 195 | int |
734 : | get_mv(Bitstream * bs, | ||
735 : | int fcode) | ||
736 : | Isibaar | 3 | { |
737 : | edgomez | 78 | |
738 : | Isibaar | 3 | int data; |
739 : | int res; | ||
740 : | int mv; | ||
741 : | int scale_fac = 1 << (fcode - 1); | ||
742 : | |||
743 : | data = get_mv_data(bs); | ||
744 : | edgomez | 195 | |
745 : | if (scale_fac == 1 || data == 0) | ||
746 : | Isibaar | 3 | return data; |
747 : | |||
748 : | res = BitstreamGetBits(bs, fcode - 1); | ||
749 : | mv = ((ABS(data) - 1) * scale_fac) + res + 1; | ||
750 : | edgomez | 195 | |
751 : | Isibaar | 3 | return data < 0 ? -mv : mv; |
752 : | edgomez | 78 | |
753 : | Isibaar | 3 | } |
754 : | |||
755 : | edgomez | 195 | int |
756 : | get_dc_dif(Bitstream * bs, | ||
757 : | uint32_t dc_size) | ||
758 : | Isibaar | 3 | { |
759 : | edgomez | 78 | |
760 : | Isibaar | 3 | int code = BitstreamGetBits(bs, dc_size); |
761 : | int msb = code >> (dc_size - 1); | ||
762 : | |||
763 : | edgomez | 195 | if (msb == 0) |
764 : | return (-1 * (code ^ ((1 << dc_size) - 1))); | ||
765 : | Isibaar | 3 | |
766 : | return code; | ||
767 : | edgomez | 78 | |
768 : | Isibaar | 3 | } |
769 : | |||
770 : | edgomez | 195 | int |
771 : | get_dc_size_lum(Bitstream * bs) | ||
772 : | Isibaar | 3 | { |
773 : | edgomez | 78 | |
774 : | Isibaar | 3 | int code, i; |
775 : | edgomez | 195 | |
776 : | Isibaar | 3 | code = BitstreamShowBits(bs, 11); |
777 : | |||
778 : | edgomez | 195 | for (i = 11; i > 3; i--) { |
779 : | if (code == 1) { | ||
780 : | Isibaar | 3 | BitstreamSkip(bs, i); |
781 : | return i + 1; | ||
782 : | } | ||
783 : | code >>= 1; | ||
784 : | } | ||
785 : | |||
786 : | BitstreamSkip(bs, dc_lum_tab[code].len); | ||
787 : | return dc_lum_tab[code].code; | ||
788 : | edgomez | 78 | |
789 : | Isibaar | 3 | } |
790 : | |||
791 : | |||
792 : | edgomez | 195 | int |
793 : | get_dc_size_chrom(Bitstream * bs) | ||
794 : | Isibaar | 3 | { |
795 : | edgomez | 78 | |
796 : | Isibaar | 3 | uint32_t code, i; |
797 : | edgomez | 195 | |
798 : | Isibaar | 3 | code = BitstreamShowBits(bs, 12); |
799 : | |||
800 : | edgomez | 195 | for (i = 12; i > 2; i--) { |
801 : | if (code == 1) { | ||
802 : | Isibaar | 3 | BitstreamSkip(bs, i); |
803 : | return i; | ||
804 : | } | ||
805 : | code >>= 1; | ||
806 : | } | ||
807 : | |||
808 : | return 3 - BitstreamGetBits(bs, 2); | ||
809 : | edgomez | 78 | |
810 : | Isibaar | 3 | } |
811 : | |||
812 : | edgomez | 195 | void |
813 : | get_intra_block(Bitstream * bs, | ||
814 : | int16_t * block, | ||
815 : | int direction, | ||
816 : | int coeff) | ||
817 : | Isibaar | 3 | { |
818 : | edgomez | 78 | |
819 : | edgomez | 195 | const uint16_t *scan = scan_tables[direction]; |
820 : | chl | 530 | int level, run, last; |
821 : | Isibaar | 3 | |
822 : | edgomez | 195 | do { |
823 : | Isibaar | 3 | level = get_coeff(bs, &run, &last, 1, 0); |
824 : | edgomez | 195 | if (run == -1) { |
825 : | suxen_drol | 721 | DPRINTF(DPRINTF_ERROR,"fatal: invalid run"); |
826 : | Isibaar | 3 | break; |
827 : | } | ||
828 : | coeff += run; | ||
829 : | edgomez | 195 | block[scan[coeff]] = level; |
830 : | suxen_drol | 252 | |
831 : | DPRINTF(DPRINTF_COEFF,"block[%i] %i", scan[coeff], level); | ||
832 : | //DPRINTF(DPRINTF_COEFF,"block[%i] %i %08x", scan[coeff], level, BitstreamShowBits(bs, 32)); | ||
833 : | |||
834 : | suxen_drol | 759 | if (level < -2047 || level > 2047) { |
835 : | suxen_drol | 721 | DPRINTF(DPRINTF_ERROR,"warning: intra_overflow %i", level); |
836 : | Isibaar | 3 | } |
837 : | coeff++; | ||
838 : | } while (!last); | ||
839 : | edgomez | 78 | |
840 : | Isibaar | 3 | } |
841 : | |||
842 : | edgomez | 195 | void |
843 : | get_inter_block(Bitstream * bs, | ||
844 : | h | 543 | int16_t * block, |
845 : | int direction) | ||
846 : | Isibaar | 3 | { |
847 : | edgomez | 78 | |
848 : | h | 543 | const uint16_t *scan = scan_tables[direction]; |
849 : | Isibaar | 3 | int p; |
850 : | int level; | ||
851 : | int run; | ||
852 : | int last; | ||
853 : | |||
854 : | p = 0; | ||
855 : | edgomez | 195 | do { |
856 : | Isibaar | 3 | level = get_coeff(bs, &run, &last, 0, 0); |
857 : | edgomez | 195 | if (run == -1) { |
858 : | suxen_drol | 721 | DPRINTF(DPRINTF_ERROR,"fatal: invalid run"); |
859 : | Isibaar | 3 | break; |
860 : | } | ||
861 : | p += run; | ||
862 : | chenm001 | 161 | |
863 : | edgomez | 195 | block[scan[p]] = level; |
864 : | suxen_drol | 252 | |
865 : | DPRINTF(DPRINTF_COEFF,"block[%i] %i", scan[p], level); | ||
866 : | // DPRINTF(DPRINTF_COEFF,"block[%i] %i %08x", scan[p], level, BitstreamShowBits(bs, 32)); | ||
867 : | |||
868 : | suxen_drol | 759 | if (level < -2047 || level > 2047) { |
869 : | suxen_drol | 721 | DPRINTF(DPRINTF_ERROR,"warning: inter overflow %i", level); |
870 : | Isibaar | 3 | } |
871 : | p++; | ||
872 : | } while (!last); | ||
873 : | edgomez | 78 | |
874 : | Isibaar | 3 | } |
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