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1 : | edgomez | 851 | /****************************************************************************** |
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 : | Isibaar | 3 | |
30 : | edgomez | 851 | /****************************************************************************** |
31 : | * * | ||
32 : | * mbprediction.c * | ||
33 : | * * | ||
34 : | * Copyright (C) 2001 - Michael Militzer <isibaar@xvid.org> * | ||
35 : | * Copyright (C) 2001 - Peter Ross <pross@cs.rmit.edu.au> * | ||
36 : | * * | ||
37 : | * For more information visit the XviD homepage: http://www.xvid.org * | ||
38 : | * * | ||
39 : | ******************************************************************************/ | ||
40 : | |||
41 : | /****************************************************************************** | ||
42 : | * * | ||
43 : | * Revision history: * | ||
44 : | * * | ||
45 : | * 29.06.2002 predict_acdc() bounding * | ||
46 : | * 12.12.2001 improved calc_acdc_prediction; removed need for memcpy * | ||
47 : | * 15.12.2001 moved pmv displacement to motion estimation * | ||
48 : | * 30.11.2001 mmx cbp support * | ||
49 : | * 17.11.2001 initial version * | ||
50 : | * * | ||
51 : | ******************************************************************************/ | ||
52 : | |||
53 : | edgomez | 982 | #include <stdlib.h> |
54 : | |||
55 : | edgomez | 851 | #include "../global.h" |
56 : | Isibaar | 3 | #include "../encoder.h" |
57 : | #include "mbprediction.h" | ||
58 : | #include "../utils/mbfunctions.h" | ||
59 : | #include "../bitstream/cbp.h" | ||
60 : | edgomez | 851 | #include "../bitstream/mbcoding.h" |
61 : | #include "../bitstream/zigzag.h" | ||
62 : | Isibaar | 3 | |
63 : | |||
64 : | edgomez | 195 | static int __inline |
65 : | rescale(int predict_quant, | ||
66 : | int current_quant, | ||
67 : | int coeff) | ||
68 : | Isibaar | 3 | { |
69 : | edgomez | 195 | return (coeff != 0) ? DIV_DIV((coeff) * (predict_quant), |
70 : | (current_quant)) : 0; | ||
71 : | Isibaar | 3 | } |
72 : | |||
73 : | |||
74 : | edgomez | 195 | static const int16_t default_acdc_values[15] = { |
75 : | Isibaar | 3 | 1024, |
76 : | edgomez | 78 | 0, 0, 0, 0, 0, 0, 0, |
77 : | 0, 0, 0, 0, 0, 0, 0 | ||
78 : | Isibaar | 3 | }; |
79 : | |||
80 : | |||
81 : | /* get dc/ac prediction direction for a single block and place | ||
82 : | predictor values into MB->pred_values[j][..] | ||
83 : | */ | ||
84 : | |||
85 : | |||
86 : | edgomez | 195 | void |
87 : | predict_acdc(MACROBLOCK * pMBs, | ||
88 : | uint32_t x, | ||
89 : | uint32_t y, | ||
90 : | uint32_t mb_width, | ||
91 : | uint32_t block, | ||
92 : | int16_t qcoeff[64], | ||
93 : | uint32_t current_quant, | ||
94 : | int32_t iDcScaler, | ||
95 : | suxen_drol | 248 | int16_t predictors[8], |
96 : | suxen_drol | 252 | const int bound) |
97 : | suxen_drol | 248 | |
98 : | Isibaar | 3 | { |
99 : | suxen_drol | 252 | const int mbpos = (y * mb_width) + x; |
100 : | edgomez | 78 | int16_t *left, *top, *diag, *current; |
101 : | Isibaar | 3 | |
102 : | edgomez | 78 | int32_t left_quant = current_quant; |
103 : | int32_t top_quant = current_quant; | ||
104 : | Isibaar | 3 | |
105 : | edgomez | 78 | const int16_t *pLeft = default_acdc_values; |
106 : | const int16_t *pTop = default_acdc_values; | ||
107 : | const int16_t *pDiag = default_acdc_values; | ||
108 : | Isibaar | 3 | |
109 : | edgomez | 1053 | uint32_t index = x + y * mb_width; /* current macroblock */ |
110 : | edgomez | 195 | int *acpred_direction = &pMBs[index].acpred_directions[block]; |
111 : | Isibaar | 3 | uint32_t i; |
112 : | |||
113 : | left = top = diag = current = 0; | ||
114 : | |||
115 : | edgomez | 1053 | /* grab left,top and diag macroblocks */ |
116 : | Isibaar | 3 | |
117 : | edgomez | 1053 | /* left macroblock */ |
118 : | Isibaar | 3 | |
119 : | suxen_drol | 248 | if (x && mbpos >= bound + 1 && |
120 : | edgomez | 195 | (pMBs[index - 1].mode == MODE_INTRA || |
121 : | pMBs[index - 1].mode == MODE_INTRA_Q)) { | ||
122 : | Isibaar | 3 | |
123 : | left = pMBs[index - 1].pred_values[0]; | ||
124 : | left_quant = pMBs[index - 1].quant; | ||
125 : | } | ||
126 : | edgomez | 1053 | /* top macroblock */ |
127 : | Isibaar | 3 | |
128 : | suxen_drol | 252 | if (mbpos >= bound + (int)mb_width && |
129 : | edgomez | 195 | (pMBs[index - mb_width].mode == MODE_INTRA || |
130 : | pMBs[index - mb_width].mode == MODE_INTRA_Q)) { | ||
131 : | |||
132 : | Isibaar | 3 | top = pMBs[index - mb_width].pred_values[0]; |
133 : | top_quant = pMBs[index - mb_width].quant; | ||
134 : | edgomez | 78 | } |
135 : | edgomez | 1053 | /* diag macroblock */ |
136 : | Isibaar | 3 | |
137 : | suxen_drol | 252 | if (x && mbpos >= bound + (int)mb_width + 1 && |
138 : | edgomez | 195 | (pMBs[index - 1 - mb_width].mode == MODE_INTRA || |
139 : | pMBs[index - 1 - mb_width].mode == MODE_INTRA_Q)) { | ||
140 : | |||
141 : | Isibaar | 3 | diag = pMBs[index - 1 - mb_width].pred_values[0]; |
142 : | } | ||
143 : | |||
144 : | edgomez | 78 | current = pMBs[index].pred_values[0]; |
145 : | Isibaar | 3 | |
146 : | edgomez | 1053 | /* now grab pLeft, pTop, pDiag _blocks_ */ |
147 : | edgomez | 195 | |
148 : | Isibaar | 3 | switch (block) { |
149 : | edgomez | 195 | |
150 : | case 0: | ||
151 : | if (left) | ||
152 : | Isibaar | 3 | pLeft = left + MBPRED_SIZE; |
153 : | edgomez | 195 | |
154 : | if (top) | ||
155 : | Isibaar | 3 | pTop = top + (MBPRED_SIZE << 1); |
156 : | edgomez | 195 | |
157 : | if (diag) | ||
158 : | Isibaar | 3 | pDiag = diag + 3 * MBPRED_SIZE; |
159 : | edgomez | 195 | |
160 : | Isibaar | 3 | break; |
161 : | edgomez | 195 | |
162 : | Isibaar | 3 | case 1: |
163 : | pLeft = current; | ||
164 : | left_quant = current_quant; | ||
165 : | edgomez | 195 | |
166 : | if (top) { | ||
167 : | Isibaar | 3 | pTop = top + 3 * MBPRED_SIZE; |
168 : | pDiag = top + (MBPRED_SIZE << 1); | ||
169 : | } | ||
170 : | break; | ||
171 : | edgomez | 195 | |
172 : | Isibaar | 3 | case 2: |
173 : | edgomez | 195 | if (left) { |
174 : | Isibaar | 3 | pLeft = left + 3 * MBPRED_SIZE; |
175 : | pDiag = left + MBPRED_SIZE; | ||
176 : | } | ||
177 : | edgomez | 195 | |
178 : | Isibaar | 3 | pTop = current; |
179 : | top_quant = current_quant; | ||
180 : | |||
181 : | break; | ||
182 : | edgomez | 195 | |
183 : | Isibaar | 3 | case 3: |
184 : | pLeft = current + (MBPRED_SIZE << 1); | ||
185 : | left_quant = current_quant; | ||
186 : | edgomez | 195 | |
187 : | Isibaar | 3 | pTop = current + MBPRED_SIZE; |
188 : | top_quant = current_quant; | ||
189 : | edgomez | 195 | |
190 : | Isibaar | 3 | pDiag = current; |
191 : | edgomez | 195 | |
192 : | Isibaar | 3 | break; |
193 : | edgomez | 195 | |
194 : | Isibaar | 3 | case 4: |
195 : | edgomez | 195 | if (left) |
196 : | Isibaar | 3 | pLeft = left + (MBPRED_SIZE << 2); |
197 : | edgomez | 195 | if (top) |
198 : | Isibaar | 3 | pTop = top + (MBPRED_SIZE << 2); |
199 : | edgomez | 195 | if (diag) |
200 : | Isibaar | 3 | pDiag = diag + (MBPRED_SIZE << 2); |
201 : | break; | ||
202 : | edgomez | 195 | |
203 : | Isibaar | 3 | case 5: |
204 : | edgomez | 195 | if (left) |
205 : | Isibaar | 3 | pLeft = left + 5 * MBPRED_SIZE; |
206 : | edgomez | 195 | if (top) |
207 : | Isibaar | 3 | pTop = top + 5 * MBPRED_SIZE; |
208 : | edgomez | 195 | if (diag) |
209 : | Isibaar | 3 | pDiag = diag + 5 * MBPRED_SIZE; |
210 : | break; | ||
211 : | } | ||
212 : | |||
213 : | edgomez | 1053 | /* |
214 : | * determine ac prediction direction & ac/dc predictor place rescaled ac/dc | ||
215 : | * predictions into predictors[] for later use | ||
216 : | */ | ||
217 : | Isibaar | 3 | |
218 : | edgomez | 982 | if (abs(pLeft[0] - pDiag[0]) < abs(pDiag[0] - pTop[0])) { |
219 : | edgomez | 1053 | *acpred_direction = 1; /* vertical */ |
220 : | edgomez | 851 | predictors[0] = DIV_DIV(pTop[0], iDcScaler); |
221 : | edgomez | 195 | for (i = 1; i < 8; i++) { |
222 : | Isibaar | 3 | predictors[i] = rescale(top_quant, current_quant, pTop[i]); |
223 : | } | ||
224 : | edgomez | 195 | } else { |
225 : | edgomez | 1053 | *acpred_direction = 2; /* horizontal */ |
226 : | edgomez | 851 | predictors[0] = DIV_DIV(pLeft[0], iDcScaler); |
227 : | edgomez | 195 | for (i = 1; i < 8; i++) { |
228 : | Isibaar | 3 | predictors[i] = rescale(left_quant, current_quant, pLeft[i + 7]); |
229 : | } | ||
230 : | } | ||
231 : | } | ||
232 : | |||
233 : | |||
234 : | /* decoder: add predictors to dct_codes[] and | ||
235 : | store current coeffs to pred_values[] for future prediction | ||
236 : | */ | ||
237 : | |||
238 : | |||
239 : | edgomez | 195 | void |
240 : | add_acdc(MACROBLOCK * pMB, | ||
241 : | uint32_t block, | ||
242 : | int16_t dct_codes[64], | ||
243 : | uint32_t iDcScaler, | ||
244 : | int16_t predictors[8]) | ||
245 : | Isibaar | 3 | { |
246 : | uint8_t acpred_direction = pMB->acpred_directions[block]; | ||
247 : | edgomez | 195 | int16_t *pCurrent = pMB->pred_values[block]; |
248 : | Isibaar | 3 | uint32_t i; |
249 : | |||
250 : | edgomez | 1038 | DPRINTF(XVID_DEBUG_COEFF,"predictor[0] %i\n", predictors[0]); |
251 : | suxen_drol | 252 | |
252 : | edgomez | 1053 | dct_codes[0] += predictors[0]; /* dc prediction */ |
253 : | edgomez | 851 | pCurrent[0] = dct_codes[0] * iDcScaler; |
254 : | Isibaar | 3 | |
255 : | edgomez | 195 | if (acpred_direction == 1) { |
256 : | for (i = 1; i < 8; i++) { | ||
257 : | Isibaar | 3 | int level = dct_codes[i] + predictors[i]; |
258 : | edgomez | 195 | |
259 : | edgomez | 1038 | DPRINTF(XVID_DEBUG_COEFF,"predictor[%i] %i\n",i, predictors[i]); |
260 : | suxen_drol | 252 | |
261 : | Isibaar | 3 | dct_codes[i] = level; |
262 : | pCurrent[i] = level; | ||
263 : | edgomez | 195 | pCurrent[i + 7] = dct_codes[i * 8]; |
264 : | Isibaar | 3 | } |
265 : | edgomez | 195 | } else if (acpred_direction == 2) { |
266 : | for (i = 1; i < 8; i++) { | ||
267 : | int level = dct_codes[i * 8] + predictors[i]; | ||
268 : | edgomez | 1038 | DPRINTF(XVID_DEBUG_COEFF,"predictor[%i] %i\n",i*8, predictors[i]); |
269 : | edgomez | 195 | |
270 : | dct_codes[i * 8] = level; | ||
271 : | pCurrent[i + 7] = level; | ||
272 : | Isibaar | 3 | pCurrent[i] = dct_codes[i]; |
273 : | } | ||
274 : | edgomez | 195 | } else { |
275 : | for (i = 1; i < 8; i++) { | ||
276 : | Isibaar | 3 | pCurrent[i] = dct_codes[i]; |
277 : | edgomez | 195 | pCurrent[i + 7] = dct_codes[i * 8]; |
278 : | Isibaar | 3 | } |
279 : | } | ||
280 : | } | ||
281 : | |||
282 : | |||
283 : | |||
284 : | edgomez | 1053 | /***************************************************************************** |
285 : | ****************************************************************************/ | ||
286 : | Isibaar | 3 | |
287 : | /* encoder: subtract predictors from qcoeff[] and calculate S1/S2 | ||
288 : | |||
289 : | edgomez | 851 | returns sum of coeefficients *saved* if prediction is enabled |
290 : | |||
291 : | edgomez | 78 | S1 = sum of all (qcoeff - prediction) |
292 : | S2 = sum of all qcoeff | ||
293 : | */ | ||
294 : | Isibaar | 3 | |
295 : | edgomez | 851 | int |
296 : | calc_acdc_coeff(MACROBLOCK * pMB, | ||
297 : | edgomez | 195 | uint32_t block, |
298 : | int16_t qcoeff[64], | ||
299 : | uint32_t iDcScaler, | ||
300 : | int16_t predictors[8]) | ||
301 : | Isibaar | 3 | { |
302 : | edgomez | 195 | int16_t *pCurrent = pMB->pred_values[block]; |
303 : | Isibaar | 3 | uint32_t i; |
304 : | edgomez | 851 | int S1 = 0, S2 = 0; |
305 : | Isibaar | 3 | |
306 : | |||
307 : | /* store current coeffs to pred_values[] for future prediction */ | ||
308 : | |||
309 : | edgomez | 851 | pCurrent[0] = qcoeff[0] * iDcScaler; |
310 : | edgomez | 195 | for (i = 1; i < 8; i++) { |
311 : | Isibaar | 3 | pCurrent[i] = qcoeff[i]; |
312 : | pCurrent[i + 7] = qcoeff[i * 8]; | ||
313 : | edgomez | 78 | } |
314 : | Isibaar | 3 | |
315 : | /* subtract predictors and store back in predictors[] */ | ||
316 : | |||
317 : | qcoeff[0] = qcoeff[0] - predictors[0]; | ||
318 : | |||
319 : | edgomez | 195 | if (pMB->acpred_directions[block] == 1) { |
320 : | for (i = 1; i < 8; i++) { | ||
321 : | Isibaar | 3 | int16_t level; |
322 : | |||
323 : | level = qcoeff[i]; | ||
324 : | edgomez | 982 | S2 += abs(level); |
325 : | Isibaar | 3 | level -= predictors[i]; |
326 : | edgomez | 982 | S1 += abs(level); |
327 : | Isibaar | 3 | predictors[i] = level; |
328 : | } | ||
329 : | edgomez | 1053 | } else /* acpred_direction == 2 */ |
330 : | Isibaar | 3 | { |
331 : | edgomez | 195 | for (i = 1; i < 8; i++) { |
332 : | Isibaar | 3 | int16_t level; |
333 : | |||
334 : | edgomez | 195 | level = qcoeff[i * 8]; |
335 : | edgomez | 982 | S2 += abs(level); |
336 : | Isibaar | 3 | level -= predictors[i]; |
337 : | edgomez | 982 | S1 += abs(level); |
338 : | Isibaar | 3 | predictors[i] = level; |
339 : | } | ||
340 : | |||
341 : | edgomez | 78 | } |
342 : | Isibaar | 3 | |
343 : | edgomez | 195 | |
344 : | edgomez | 78 | return S2 - S1; |
345 : | Isibaar | 3 | } |
346 : | |||
347 : | |||
348 : | edgomez | 851 | |
349 : | /* returns the bits *saved* if prediction is enabled */ | ||
350 : | |||
351 : | int | ||
352 : | calc_acdc_bits(MACROBLOCK * pMB, | ||
353 : | uint32_t block, | ||
354 : | int16_t qcoeff[64], | ||
355 : | uint32_t iDcScaler, | ||
356 : | int16_t predictors[8]) | ||
357 : | { | ||
358 : | const int direction = pMB->acpred_directions[block]; | ||
359 : | int16_t *pCurrent = pMB->pred_values[block]; | ||
360 : | int16_t tmp[8]; | ||
361 : | unsigned int i; | ||
362 : | int Z1, Z2; | ||
363 : | |||
364 : | /* store current coeffs to pred_values[] for future prediction */ | ||
365 : | pCurrent[0] = qcoeff[0] * iDcScaler; | ||
366 : | for (i = 1; i < 8; i++) { | ||
367 : | pCurrent[i] = qcoeff[i]; | ||
368 : | pCurrent[i + 7] = qcoeff[i * 8]; | ||
369 : | } | ||
370 : | |||
371 : | |||
372 : | /* dc prediction */ | ||
373 : | qcoeff[0] = qcoeff[0] - predictors[0]; | ||
374 : | |||
375 : | /* calc cost before ac prediction */ | ||
376 : | #ifdef BIGLUT | ||
377 : | Z2 = CodeCoeff_CalcBits(qcoeff, intra_table, scan_tables[0], 1); | ||
378 : | #else | ||
379 : | Z2 = CodeCoeffIntra_CalcBits(qcoeff, scan_tables[0]); | ||
380 : | #endif | ||
381 : | |||
382 : | /* apply ac prediction & calc cost*/ | ||
383 : | if (direction == 1) { | ||
384 : | for (i = 1; i < 8; i++) { | ||
385 : | tmp[i] = qcoeff[i]; | ||
386 : | qcoeff[i] -= predictors[i]; | ||
387 : | predictors[i] = qcoeff[i]; | ||
388 : | } | ||
389 : | edgomez | 1053 | }else{ /* acpred_direction == 2 */ |
390 : | edgomez | 851 | for (i = 1; i < 8; i++) { |
391 : | tmp[i] = qcoeff[i*8]; | ||
392 : | qcoeff[i*8] -= predictors[i]; | ||
393 : | predictors[i] = qcoeff[i*8]; | ||
394 : | } | ||
395 : | } | ||
396 : | |||
397 : | #ifdef BIGLUT | ||
398 : | Z1 = CodeCoeff_CalcBits(qcoeff, intra_table, scan_tables[direction], 1); | ||
399 : | #else | ||
400 : | Z1 = CodeCoeffIntra_CalcBits(qcoeff, scan_tables[direction]); | ||
401 : | #endif | ||
402 : | |||
403 : | /* undo prediction */ | ||
404 : | if (direction == 1) { | ||
405 : | for (i = 1; i < 8; i++) | ||
406 : | qcoeff[i] = tmp[i]; | ||
407 : | edgomez | 1053 | }else{ /* acpred_direction == 2 */ |
408 : | edgomez | 851 | for (i = 1; i < 8; i++) |
409 : | qcoeff[i*8] = tmp[i]; | ||
410 : | } | ||
411 : | |||
412 : | return Z2-Z1; | ||
413 : | } | ||
414 : | |||
415 : | Isibaar | 3 | /* apply predictors[] to qcoeff */ |
416 : | |||
417 : | edgomez | 195 | void |
418 : | apply_acdc(MACROBLOCK * pMB, | ||
419 : | uint32_t block, | ||
420 : | int16_t qcoeff[64], | ||
421 : | int16_t predictors[8]) | ||
422 : | Isibaar | 3 | { |
423 : | edgomez | 851 | unsigned int i; |
424 : | Isibaar | 3 | |
425 : | edgomez | 195 | if (pMB->acpred_directions[block] == 1) { |
426 : | edgomez | 851 | for (i = 1; i < 8; i++) |
427 : | Isibaar | 3 | qcoeff[i] = predictors[i]; |
428 : | edgomez | 195 | } else { |
429 : | edgomez | 851 | for (i = 1; i < 8; i++) |
430 : | edgomez | 195 | qcoeff[i * 8] = predictors[i]; |
431 : | edgomez | 78 | } |
432 : | Isibaar | 3 | } |
433 : | |||
434 : | |||
435 : | edgomez | 195 | void |
436 : | MBPrediction(FRAMEINFO * frame, | ||
437 : | uint32_t x, | ||
438 : | uint32_t y, | ||
439 : | uint32_t mb_width, | ||
440 : | int16_t qcoeff[6 * 64]) | ||
441 : | Isibaar | 3 | { |
442 : | edgomez | 78 | |
443 : | int32_t j; | ||
444 : | suxen_drol | 926 | int32_t iDcScaler, iQuant; |
445 : | edgomez | 851 | int S = 0; |
446 : | Isibaar | 3 | int16_t predictors[6][8]; |
447 : | |||
448 : | suxen_drol | 136 | MACROBLOCK *pMB = &frame->mbs[x + y * mb_width]; |
449 : | suxen_drol | 926 | iQuant = pMB->quant; |
450 : | Isibaar | 3 | |
451 : | edgomez | 78 | if ((pMB->mode == MODE_INTRA) || (pMB->mode == MODE_INTRA_Q)) { |
452 : | edgomez | 195 | |
453 : | for (j = 0; j < 6; j++) { | ||
454 : | edgomez | 851 | iDcScaler = get_dc_scaler(iQuant, j<4); |
455 : | Isibaar | 3 | |
456 : | edgomez | 195 | predict_acdc(frame->mbs, x, y, mb_width, j, &qcoeff[j * 64], |
457 : | suxen_drol | 252 | iQuant, iDcScaler, predictors[j], 0); |
458 : | edgomez | 78 | |
459 : | edgomez | 949 | if ((frame->vop_flags & XVID_VOP_HQACPRED)) |
460 : | edgomez | 851 | S += calc_acdc_bits(pMB, j, &qcoeff[j * 64], iDcScaler, predictors[j]); |
461 : | else | ||
462 : | S += calc_acdc_coeff(pMB, j, &qcoeff[j * 64], iDcScaler, predictors[j]); | ||
463 : | edgomez | 78 | |
464 : | Isibaar | 3 | } |
465 : | |||
466 : | edgomez | 1053 | if (S<=0) { /* dont predict */ |
467 : | edgomez | 851 | for (j = 0; j < 6; j++) |
468 : | Isibaar | 3 | pMB->acpred_directions[j] = 0; |
469 : | edgomez | 851 | }else{ |
470 : | for (j = 0; j < 6; j++) | ||
471 : | edgomez | 195 | apply_acdc(pMB, j, &qcoeff[j * 64], predictors[j]); |
472 : | Isibaar | 3 | } |
473 : | edgomez | 851 | |
474 : | Isibaar | 3 | pMB->cbp = calc_cbp(qcoeff); |
475 : | } | ||
476 : | edgomez | 78 | |
477 : | Isibaar | 3 | } |
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