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Original Path: trunk/xvidcore/src/bitstream/mbcoding.c
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 : | Isibaar | 153 | * 14.04.2002 bframe encoding * |
45 : | suxen_drol | 118 | * 08.03.2002 initial version; isibaar * |
46 : | * * | ||
47 : | ******************************************************************************/ | ||
48 : | |||
49 : | |||
50 : | |||
51 : | Isibaar | 100 | #include <stdlib.h> |
52 : | Isibaar | 3 | #include "../portab.h" |
53 : | #include "bitstream.h" | ||
54 : | #include "zigzag.h" | ||
55 : | #include "vlc_codes.h" | ||
56 : | Isibaar | 100 | #include "mbcoding.h" |
57 : | Isibaar | 3 | |
58 : | #include "../utils/mbfunctions.h" | ||
59 : | |||
60 : | #define ABS(X) (((X)>0)?(X):-(X)) | ||
61 : | #define CLIP(X,A) (X > A) ? (A) : (X) | ||
62 : | |||
63 : | Isibaar | 153 | VLC intra_table[524032]; |
64 : | VLC inter_table[524032]; | ||
65 : | Isibaar | 100 | |
66 : | Isibaar | 114 | VLC DCT3Dintra[4096]; |
67 : | VLC DCT3Dinter[4096]; | ||
68 : | Isibaar | 3 | |
69 : | Isibaar | 100 | void init_vlc_tables(void) |
70 : | Isibaar | 3 | { |
71 : | edgomez | 78 | |
72 : | Isibaar | 3 | int32_t k, l, i, intra, last; |
73 : | VLC *vlc[2]; | ||
74 : | VLC **coeff_ptr; | ||
75 : | VLC *vlc1, *vlc2; | ||
76 : | |||
77 : | vlc1 = DCT3Dintra; | ||
78 : | vlc2 = DCT3Dinter; | ||
79 : | |||
80 : | Isibaar | 100 | vlc[0] = intra_table; |
81 : | vlc[1] = inter_table; | ||
82 : | Isibaar | 3 | |
83 : | Isibaar | 100 | // generate encoding vlc lookup tables |
84 : | Isibaar | 153 | // the lookup table idea is taken from the excellent fame project by Vivien Chapellier |
85 : | Isibaar | 3 | for(i = 0; i < 4; i++) { |
86 : | intra = i % 2; | ||
87 : | Isibaar | 100 | last = i / 2; |
88 : | Isibaar | 3 | |
89 : | Isibaar | 100 | coeff_ptr = coeff_vlc[last + 2 * intra]; |
90 : | Isibaar | 153 | |
91 : | for(k = -2047; k < 2048; k++) { // level | ||
92 : | Isibaar | 100 | int8_t *max_level_ptr = max_level[last + 2 * intra]; |
93 : | int8_t *max_run_ptr = max_run[last + 2 * intra]; | ||
94 : | Isibaar | 3 | |
95 : | for(l = 0; l < 64; l++) { // run | ||
96 : | Isibaar | 35 | int32_t level = k; |
97 : | uint32_t run = l; | ||
98 : | Isibaar | 100 | |
99 : | if((abs(level) <= max_level_ptr[run]) && | ||
100 : | chenm001 | 133 | (run <= (uint32_t)max_run_ptr[abs(level)])) { // level < max_level and run < max_run |
101 : | Isibaar | 100 | |
102 : | Isibaar | 3 | vlc[intra]->code = 0; |
103 : | vlc[intra]->len = 0; | ||
104 : | Isibaar | 100 | goto loop_end; |
105 : | } | ||
106 : | else { | ||
107 : | if(level > 0) // correct level | ||
108 : | Isibaar | 3 | level -= max_level_ptr[run]; |
109 : | else | ||
110 : | level += max_level_ptr[run]; | ||
111 : | Isibaar | 35 | |
112 : | Isibaar | 100 | if((abs(level) <= max_level_ptr[run]) && |
113 : | chenm001 | 133 | (run <= (uint32_t) max_run_ptr[abs(level)])) { |
114 : | Isibaar | 28 | |
115 : | Isibaar | 100 | vlc[intra]->code = 0x06; |
116 : | vlc[intra]->len = 8; | ||
117 : | goto loop_end; | ||
118 : | } | ||
119 : | Isibaar | 3 | |
120 : | Isibaar | 100 | if(level > 0) // still here? |
121 : | level += max_level_ptr[run]; // restore level | ||
122 : | else | ||
123 : | level -= max_level_ptr[run]; | ||
124 : | |||
125 : | run -= max_run_ptr[abs(level)] + 1; // and change run | ||
126 : | |||
127 : | if((abs(level) <= max_level_ptr[run]) && | ||
128 : | chenm001 | 133 | (run <= (uint32_t) max_run_ptr[abs(level)])) { |
129 : | Isibaar | 100 | |
130 : | vlc[intra]->code = 0x0e; | ||
131 : | vlc[intra]->len = 9; | ||
132 : | goto loop_end; | ||
133 : | Isibaar | 3 | } |
134 : | Isibaar | 100 | run += max_run_ptr[abs(level)] + 1; |
135 : | Isibaar | 3 | } |
136 : | Isibaar | 100 | |
137 : | vlc[intra]->code = (uint32_t) ((l << 14) | (0x1e + last) << 20) | | ||
138 : | (1 << 13) | ((k & 0xfff) << 1) | 1; | ||
139 : | |||
140 : | vlc[intra]->len = 30; | ||
141 : | Isibaar | 3 | vlc[intra]++; |
142 : | Isibaar | 100 | continue; |
143 : | |||
144 : | loop_end: | ||
145 : | if(level != 0) { | ||
146 : | vlc[intra]->code = (vlc[intra]->code << (coeff_ptr[run][abs(level) - 1].len + 1)) | | ||
147 : | (coeff_ptr[run][abs(level) - 1].code << 1); | ||
148 : | vlc[intra]->len = (coeff_ptr[run][abs(level) - 1].len + 1) + vlc[intra]->len; | ||
149 : | |||
150 : | if(level < 0) | ||
151 : | vlc[intra]->code += 1; | ||
152 : | } | ||
153 : | |||
154 : | vlc[intra]++; | ||
155 : | Isibaar | 3 | } |
156 : | } | ||
157 : | } | ||
158 : | edgomez | 78 | |
159 : | Isibaar | 3 | for(i = 0; i < 4096; i++) { |
160 : | if(i >= 512) { | ||
161 : | *vlc1 = DCT3Dtab3[(i >> 5) - 16]; | ||
162 : | *vlc2 = DCT3Dtab0[(i >> 5) - 16]; | ||
163 : | } | ||
164 : | else if(i >= 128) { | ||
165 : | *vlc1 = DCT3Dtab4[(i >> 2) - 32]; | ||
166 : | *vlc2 = DCT3Dtab1[(i >> 2) - 32]; | ||
167 : | } | ||
168 : | else if(i >= 8) { | ||
169 : | *vlc1 = DCT3Dtab5[i - 8]; | ||
170 : | *vlc2 = DCT3Dtab2[i - 8]; | ||
171 : | } | ||
172 : | else { | ||
173 : | *vlc1 = ERRtab[i]; | ||
174 : | *vlc2 = ERRtab[i]; | ||
175 : | } | ||
176 : | |||
177 : | vlc1++; | ||
178 : | vlc2++; | ||
179 : | } | ||
180 : | DCT3D[0] = DCT3Dinter; | ||
181 : | DCT3D[1] = DCT3Dintra; | ||
182 : | |||
183 : | } | ||
184 : | |||
185 : | edgomez | 78 | static __inline void CodeVector(Bitstream *bs, |
186 : | suxen_drol | 136 | int32_t value, |
187 : | int32_t f_code, | ||
188 : | edgomez | 78 | Statistics *pStat) |
189 : | Isibaar | 3 | { |
190 : | edgomez | 78 | |
191 : | Isibaar | 3 | const int scale_factor = 1 << (f_code - 1); |
192 : | const int cmp = scale_factor << 5; | ||
193 : | |||
194 : | if(value < (-1 * cmp)) | ||
195 : | value += 64 * scale_factor; | ||
196 : | |||
197 : | if(value > (cmp - 1)) | ||
198 : | value -= 64 * scale_factor; | ||
199 : | |||
200 : | edgomez | 78 | pStat->iMvSum += value * value; |
201 : | pStat->iMvCount++; | ||
202 : | Isibaar | 3 | |
203 : | edgomez | 78 | if (value == 0) { |
204 : | Isibaar | 3 | BitstreamPutBits(bs, mb_motion_table[32].code, mb_motion_table[32].len); |
205 : | edgomez | 78 | } else { |
206 : | Isibaar | 3 | uint16_t length, code, mv_res, sign; |
207 : | |||
208 : | length = 16 << f_code; | ||
209 : | f_code--; | ||
210 : | |||
211 : | sign = (value < 0); | ||
212 : | |||
213 : | if(value >= length) | ||
214 : | value -= 2 * length; | ||
215 : | else if(value < -length) | ||
216 : | value += 2 * length; | ||
217 : | |||
218 : | if(sign) | ||
219 : | value = -value; | ||
220 : | |||
221 : | value--; | ||
222 : | mv_res = value & ((1 << f_code) - 1); | ||
223 : | code = ((value - mv_res) >> f_code) + 1; | ||
224 : | |||
225 : | if(sign) | ||
226 : | code = -code; | ||
227 : | |||
228 : | code += 32; | ||
229 : | BitstreamPutBits(bs, mb_motion_table[code].code, mb_motion_table[code].len); | ||
230 : | |||
231 : | if(f_code) | ||
232 : | BitstreamPutBits(bs, mv_res, f_code); | ||
233 : | edgomez | 78 | } |
234 : | |||
235 : | Isibaar | 3 | } |
236 : | |||
237 : | |||
238 : | edgomez | 78 | static __inline void CodeCoeff(Bitstream *bs, |
239 : | suxen_drol | 136 | const int16_t qcoeff[64], |
240 : | edgomez | 78 | VLC *table, |
241 : | const uint16_t *zigzag, | ||
242 : | uint16_t intra) | ||
243 : | { | ||
244 : | |||
245 : | Isibaar | 3 | uint32_t j, last; |
246 : | short v; | ||
247 : | VLC *vlc; | ||
248 : | |||
249 : | j = intra; | ||
250 : | Isibaar | 116 | last = intra; |
251 : | Isibaar | 3 | |
252 : | Isibaar | 153 | while(j < 64 && (v = qcoeff[zigzag[j]]) == 0) j++; |
253 : | Isibaar | 3 | |
254 : | do { | ||
255 : | Isibaar | 153 | vlc = table + 64 * 2047 + (v << 6) + j - last; |
256 : | Isibaar | 116 | last = ++j; |
257 : | Isibaar | 153 | |
258 : | // count zeroes | ||
259 : | Isibaar | 116 | while(j < 64 && (v = qcoeff[zigzag[j]]) == 0) j++; |
260 : | Isibaar | 3 | |
261 : | // write code | ||
262 : | if(j != 64) { | ||
263 : | BitstreamPutBits(bs, vlc->code, vlc->len); | ||
264 : | } else { | ||
265 : | Isibaar | 153 | vlc += 64 * 4095; |
266 : | Isibaar | 3 | BitstreamPutBits(bs, vlc->code, vlc->len); |
267 : | break; | ||
268 : | } | ||
269 : | } while(1); | ||
270 : | edgomez | 78 | |
271 : | Isibaar | 3 | } |
272 : | |||
273 : | |||
274 : | suxen_drol | 136 | static void CodeBlockIntra(const FRAMEINFO * frame, |
275 : | edgomez | 78 | const MACROBLOCK *pMB, |
276 : | int16_t qcoeff[6*64], | ||
277 : | Bitstream * bs, | ||
278 : | Statistics * pStat) | ||
279 : | Isibaar | 3 | { |
280 : | edgomez | 78 | |
281 : | Isibaar | 3 | uint32_t i, mcbpc, cbpy, bits; |
282 : | |||
283 : | cbpy = pMB->cbp >> 2; | ||
284 : | |||
285 : | edgomez | 78 | // write mcbpc |
286 : | suxen_drol | 136 | if(frame->coding_type == I_VOP) { |
287 : | edgomez | 78 | mcbpc = ((pMB->mode >> 1) & 3) | ((pMB->cbp & 3) << 2); |
288 : | Isibaar | 28 | BitstreamPutBits(bs, mcbpc_intra_tab[mcbpc].code, mcbpc_intra_tab[mcbpc].len); |
289 : | } | ||
290 : | else { | ||
291 : | edgomez | 78 | mcbpc = (pMB->mode & 7) | ((pMB->cbp & 3) << 3); |
292 : | Isibaar | 28 | BitstreamPutBits(bs, mcbpc_inter_tab[mcbpc].code, mcbpc_inter_tab[mcbpc].len); |
293 : | } | ||
294 : | Isibaar | 3 | |
295 : | // ac prediction flag | ||
296 : | if(pMB->acpred_directions[0]) | ||
297 : | edgomez | 78 | BitstreamPutBits(bs, 1, 1); |
298 : | Isibaar | 3 | else |
299 : | edgomez | 78 | BitstreamPutBits(bs, 0, 1); |
300 : | Isibaar | 3 | |
301 : | edgomez | 78 | // write cbpy |
302 : | Isibaar | 3 | BitstreamPutBits (bs, cbpy_tab[cbpy].code, cbpy_tab[cbpy].len); |
303 : | |||
304 : | // write dquant | ||
305 : | edgomez | 78 | if(pMB->mode == MODE_INTRA_Q) |
306 : | Isibaar | 3 | BitstreamPutBits(bs, pMB->dquant, 2); |
307 : | |||
308 : | h | 69 | // write interlacing |
309 : | suxen_drol | 136 | if (frame->global_flags & XVID_INTERLACING) |
310 : | h | 69 | { |
311 : | BitstreamPutBit(bs, pMB->field_dct); | ||
312 : | } | ||
313 : | |||
314 : | Isibaar | 3 | // code block coeffs |
315 : | for(i = 0; i < 6; i++) | ||
316 : | { | ||
317 : | if(i < 4) | ||
318 : | edgomez | 78 | BitstreamPutBits(bs, |
319 : | dcy_tab[qcoeff[i*64 + 0] + 255].code, | ||
320 : | dcy_tab[qcoeff[i*64 + 0] + 255].len); | ||
321 : | Isibaar | 3 | else |
322 : | edgomez | 78 | BitstreamPutBits(bs, |
323 : | dcc_tab[qcoeff[i*64 + 0] + 255].code, | ||
324 : | dcc_tab[qcoeff[i*64 + 0] + 255].len); | ||
325 : | Isibaar | 3 | |
326 : | if(pMB->cbp & (1 << (5 - i))) | ||
327 : | { | ||
328 : | bits = BitstreamPos(bs); | ||
329 : | |||
330 : | edgomez | 78 | CodeCoeff(bs, |
331 : | &qcoeff[i*64], | ||
332 : | intra_table, | ||
333 : | scan_tables[pMB->acpred_directions[i]], | ||
334 : | 1); | ||
335 : | Isibaar | 3 | |
336 : | bits = BitstreamPos(bs) - bits; | ||
337 : | pStat->iTextBits += bits; | ||
338 : | } | ||
339 : | } | ||
340 : | edgomez | 78 | |
341 : | Isibaar | 3 | } |
342 : | |||
343 : | |||
344 : | suxen_drol | 136 | static void CodeBlockInter(const FRAMEINFO * frame, |
345 : | edgomez | 78 | const MACROBLOCK *pMB, |
346 : | int16_t qcoeff[6*64], | ||
347 : | Bitstream * bs, | ||
348 : | Statistics * pStat) | ||
349 : | Isibaar | 3 | { |
350 : | edgomez | 78 | |
351 : | Isibaar | 3 | int32_t i; |
352 : | uint32_t bits, mcbpc, cbpy; | ||
353 : | |||
354 : | edgomez | 78 | mcbpc = (pMB->mode & 7) | ((pMB->cbp & 3) << 3); |
355 : | Isibaar | 3 | cbpy = 15 - (pMB->cbp >> 2); |
356 : | |||
357 : | // write mcbpc | ||
358 : | edgomez | 78 | BitstreamPutBits(bs, mcbpc_inter_tab[mcbpc].code, mcbpc_inter_tab[mcbpc].len); |
359 : | Isibaar | 3 | |
360 : | // write cbpy | ||
361 : | BitstreamPutBits(bs, cbpy_tab[cbpy].code, cbpy_tab[cbpy].len); | ||
362 : | |||
363 : | // write dquant | ||
364 : | edgomez | 78 | if(pMB->mode == MODE_INTER_Q) |
365 : | Isibaar | 3 | BitstreamPutBits(bs, pMB->dquant, 2); |
366 : | |||
367 : | h | 69 | // interlacing |
368 : | suxen_drol | 136 | if (frame->global_flags & XVID_INTERLACING) |
369 : | h | 69 | { |
370 : | BitstreamPutBit(bs, pMB->field_dct); | ||
371 : | DEBUG1("codep: field_dct: ", pMB->field_dct); | ||
372 : | |||
373 : | // if inter block, write field ME flag | ||
374 : | if (pMB->mode == MODE_INTER || pMB->mode == MODE_INTER_Q) | ||
375 : | { | ||
376 : | BitstreamPutBit(bs, pMB->field_pred); | ||
377 : | DEBUG1("codep: field_pred: ", pMB->field_pred); | ||
378 : | |||
379 : | // write field prediction references | ||
380 : | if (pMB->field_pred) | ||
381 : | { | ||
382 : | BitstreamPutBit(bs, pMB->field_for_top); | ||
383 : | BitstreamPutBit(bs, pMB->field_for_bot); | ||
384 : | } | ||
385 : | } | ||
386 : | } | ||
387 : | |||
388 : | Isibaar | 3 | // code motion vector(s) |
389 : | for(i = 0; i < (pMB->mode == MODE_INTER4V ? 4 : 1); i++) | ||
390 : | { | ||
391 : | suxen_drol | 136 | CodeVector(bs, pMB->pmvs[i].x, frame->fcode, pStat); |
392 : | CodeVector(bs, pMB->pmvs[i].y, frame->fcode, pStat); | ||
393 : | Isibaar | 3 | } |
394 : | |||
395 : | bits = BitstreamPos(bs); | ||
396 : | |||
397 : | // code block coeffs | ||
398 : | for(i = 0; i < 6; i++) | ||
399 : | if(pMB->cbp & (1 << (5 - i))) | ||
400 : | edgomez | 78 | CodeCoeff(bs, &qcoeff[i*64], inter_table, scan_tables[0], 0); |
401 : | Isibaar | 3 | |
402 : | bits = BitstreamPos(bs) - bits; | ||
403 : | pStat->iTextBits += bits; | ||
404 : | edgomez | 78 | |
405 : | Isibaar | 3 | } |
406 : | |||
407 : | |||
408 : | suxen_drol | 136 | void MBCoding(const FRAMEINFO * frame, |
409 : | edgomez | 78 | MACROBLOCK *pMB, |
410 : | int16_t qcoeff[6*64], | ||
411 : | Bitstream * bs, | ||
412 : | Statistics * pStat) | ||
413 : | Isibaar | 3 | { |
414 : | edgomez | 78 | |
415 : | Isibaar | 3 | int intra = (pMB->mode == MODE_INTRA || pMB->mode == MODE_INTRA_Q); |
416 : | |||
417 : | suxen_drol | 136 | if(frame->coding_type == P_VOP) { |
418 : | Isibaar | 3 | if(pMB->cbp == 0 && pMB->mode == MODE_INTER && |
419 : | edgomez | 78 | pMB->mvs[0].x == 0 && pMB->mvs[0].y == 0) |
420 : | Isibaar | 3 | { |
421 : | BitstreamPutBit(bs, 1); // not_coded | ||
422 : | return; | ||
423 : | } | ||
424 : | else | ||
425 : | BitstreamPutBit(bs, 0); // coded | ||
426 : | } | ||
427 : | |||
428 : | if(intra) | ||
429 : | suxen_drol | 136 | CodeBlockIntra(frame, pMB, qcoeff, bs, pStat); |
430 : | Isibaar | 3 | else |
431 : | suxen_drol | 136 | CodeBlockInter(frame, pMB, qcoeff, bs, pStat); |
432 : | edgomez | 78 | |
433 : | Isibaar | 3 | } |
434 : | |||
435 : | suxen_drol | 118 | /*************************************************************** |
436 : | * bframe encoding start | ||
437 : | ***************************************************************/ | ||
438 : | Isibaar | 3 | |
439 : | suxen_drol | 118 | /* |
440 : | mbtype | ||
441 : | 0 1b direct(h263) mvdb | ||
442 : | 1 01b interpolate mc+q dbquant, mvdf, mvdb | ||
443 : | 2 001b backward mc+q dbquant, mvdb | ||
444 : | 3 0001b forward mc+q dbquant, mvdf | ||
445 : | */ | ||
446 : | |||
447 : | void put_bvop_mbtype(Bitstream * bs, int value) | ||
448 : | { | ||
449 : | switch(value) | ||
450 : | { | ||
451 : | case 0 : BitstreamPutBit(bs, 1); | ||
452 : | return; | ||
453 : | |||
454 : | case 1 : BitstreamPutBit(bs, 0); | ||
455 : | BitstreamPutBit(bs, 1); | ||
456 : | return; | ||
457 : | |||
458 : | case 2 : BitstreamPutBit(bs, 0); | ||
459 : | BitstreamPutBit(bs, 0); | ||
460 : | BitstreamPutBit(bs, 1); | ||
461 : | return; | ||
462 : | |||
463 : | case 3 : BitstreamPutBit(bs, 0); | ||
464 : | BitstreamPutBit(bs, 0); | ||
465 : | BitstreamPutBit(bs, 0); | ||
466 : | BitstreamPutBit(bs, 1); | ||
467 : | return; | ||
468 : | |||
469 : | default : ; // invalid! | ||
470 : | |||
471 : | } | ||
472 : | |||
473 : | } | ||
474 : | |||
475 : | /* | ||
476 : | dbquant | ||
477 : | -2 10b | ||
478 : | 0 0b | ||
479 : | +2 11b | ||
480 : | */ | ||
481 : | |||
482 : | void put_bvop_dbquant(Bitstream *bs, int value) | ||
483 : | { | ||
484 : | switch (value) | ||
485 : | { | ||
486 : | case 0 : BitstreamPutBit(bs, 0); | ||
487 : | return; | ||
488 : | |||
489 : | case -2 : BitstreamPutBit(bs, 1); | ||
490 : | BitstreamPutBit(bs, 0); | ||
491 : | return; | ||
492 : | |||
493 : | case 2 : BitstreamPutBit(bs, 1); | ||
494 : | BitstreamPutBit(bs, 1); | ||
495 : | return; | ||
496 : | |||
497 : | default : ; // invalid | ||
498 : | } | ||
499 : | } | ||
500 : | |||
501 : | |||
502 : | |||
503 : | void MBCodingBVOP(const MACROBLOCK * mb, | ||
504 : | const int16_t qcoeff[6*64], | ||
505 : | suxen_drol | 152 | const int32_t fcode, |
506 : | const int32_t bcode, | ||
507 : | suxen_drol | 118 | Bitstream * bs, |
508 : | Statistics * pStat) | ||
509 : | { | ||
510 : | int i; | ||
511 : | |||
512 : | /* ------------------------------------------------------------------ | ||
513 : | when a block is skipped it is decoded DIRECT(0,) | ||
514 : | hence are interpolated from forward & backward frames | ||
515 : | ------------------------------------------------------------------ */ | ||
516 : | |||
517 : | if (mb->mode == 5) | ||
518 : | { | ||
519 : | BitstreamPutBit(bs, 1); // skipped | ||
520 : | return; | ||
521 : | } | ||
522 : | |||
523 : | BitstreamPutBit(bs, 0); // not skipped | ||
524 : | |||
525 : | if (mb->cbp == 0) | ||
526 : | { | ||
527 : | BitstreamPutBit(bs, 1); // cbp == 0 | ||
528 : | } | ||
529 : | else | ||
530 : | { | ||
531 : | BitstreamPutBit(bs, 0); // cbp == xxx | ||
532 : | } | ||
533 : | |||
534 : | put_bvop_mbtype(bs, mb->mode); | ||
535 : | |||
536 : | if (mb->cbp) | ||
537 : | { | ||
538 : | BitstreamPutBits(bs, mb->cbp, 6); | ||
539 : | } | ||
540 : | |||
541 : | if (mb->mode != MODE_DIRECT && mb->cbp != 0) | ||
542 : | { | ||
543 : | put_bvop_dbquant(bs, 0); // todo: mb->dquant = 0 | ||
544 : | } | ||
545 : | |||
546 : | if (mb->mode == MODE_INTERPOLATE || mb->mode == MODE_FORWARD) | ||
547 : | { | ||
548 : | CodeVector(bs, mb->pmvs[0].x, fcode, pStat); | ||
549 : | CodeVector(bs, mb->pmvs[0].y, fcode, pStat); | ||
550 : | } | ||
551 : | |||
552 : | if (mb->mode == MODE_INTERPOLATE || mb->mode == MODE_BACKWARD) | ||
553 : | { | ||
554 : | CodeVector(bs, mb->b_pmvs[0].x, bcode, pStat); | ||
555 : | CodeVector(bs, mb->b_pmvs[0].y, bcode, pStat); | ||
556 : | } | ||
557 : | |||
558 : | if (mb->mode == MODE_DIRECT) | ||
559 : | { | ||
560 : | // TODO: direct | ||
561 : | } | ||
562 : | |||
563 : | for (i = 0; i < 6; i++) | ||
564 : | { | ||
565 : | if (mb->cbp & (1 << (5 - i))) | ||
566 : | { | ||
567 : | CodeCoeff(bs, &qcoeff[i*64], inter_table, scan_tables[0], 0); | ||
568 : | } | ||
569 : | } | ||
570 : | } | ||
571 : | |||
572 : | |||
573 : | |||
574 : | Isibaar | 3 | /*************************************************************** |
575 : | edgomez | 15 | * decoding stuff starts here * |
576 : | ***************************************************************/ | ||
577 : | Isibaar | 3 | |
578 : | int get_mcbpc_intra(Bitstream * bs) | ||
579 : | { | ||
580 : | edgomez | 78 | |
581 : | Isibaar | 3 | uint32_t index; |
582 : | |||
583 : | while((index = BitstreamShowBits(bs, 9)) == 1) | ||
584 : | BitstreamSkip(bs, 9); | ||
585 : | |||
586 : | index >>= 3; | ||
587 : | |||
588 : | BitstreamSkip(bs, mcbpc_intra_table[index].len); | ||
589 : | edgomez | 78 | |
590 : | Isibaar | 3 | return mcbpc_intra_table[index].code; |
591 : | edgomez | 78 | |
592 : | Isibaar | 3 | } |
593 : | |||
594 : | int get_mcbpc_inter(Bitstream * bs) | ||
595 : | { | ||
596 : | edgomez | 78 | |
597 : | Isibaar | 3 | uint32_t index; |
598 : | |||
599 : | while((index = CLIP(BitstreamShowBits(bs, 9), 256)) == 1) | ||
600 : | BitstreamSkip(bs, 9); | ||
601 : | |||
602 : | edgomez | 78 | BitstreamSkip(bs, mcbpc_inter_table[index].len); |
603 : | |||
604 : | Isibaar | 3 | return mcbpc_inter_table[index].code; |
605 : | edgomez | 78 | |
606 : | Isibaar | 3 | } |
607 : | |||
608 : | int get_cbpy(Bitstream * bs, int intra) | ||
609 : | { | ||
610 : | edgomez | 78 | |
611 : | Isibaar | 3 | int cbpy; |
612 : | uint32_t index = BitstreamShowBits(bs, 6); | ||
613 : | |||
614 : | BitstreamSkip(bs, cbpy_table[index].len); | ||
615 : | cbpy = cbpy_table[index].code; | ||
616 : | |||
617 : | if(!intra) | ||
618 : | cbpy = 15 - cbpy; | ||
619 : | |||
620 : | return cbpy; | ||
621 : | edgomez | 78 | |
622 : | Isibaar | 3 | } |
623 : | |||
624 : | int get_mv_data(Bitstream * bs) | ||
625 : | { | ||
626 : | edgomez | 78 | |
627 : | Isibaar | 3 | uint32_t index; |
628 : | |||
629 : | if(BitstreamGetBit(bs)) | ||
630 : | return 0; | ||
631 : | |||
632 : | index = BitstreamShowBits(bs, 12); | ||
633 : | |||
634 : | if(index >= 512) | ||
635 : | { | ||
636 : | index = (index >> 8) - 2; | ||
637 : | BitstreamSkip(bs, TMNMVtab0[index].len); | ||
638 : | return TMNMVtab0[index].code; | ||
639 : | } | ||
640 : | |||
641 : | if(index >= 128) | ||
642 : | { | ||
643 : | index = (index >> 2) - 32; | ||
644 : | BitstreamSkip(bs, TMNMVtab1[index].len); | ||
645 : | return TMNMVtab1[index].code; | ||
646 : | } | ||
647 : | |||
648 : | index -= 4; | ||
649 : | |||
650 : | BitstreamSkip(bs, TMNMVtab2[index].len); | ||
651 : | return TMNMVtab2[index].code; | ||
652 : | edgomez | 78 | |
653 : | Isibaar | 3 | } |
654 : | |||
655 : | int get_mv(Bitstream * bs, int fcode) | ||
656 : | { | ||
657 : | edgomez | 78 | |
658 : | Isibaar | 3 | int data; |
659 : | int res; | ||
660 : | int mv; | ||
661 : | int scale_fac = 1 << (fcode - 1); | ||
662 : | |||
663 : | data = get_mv_data(bs); | ||
664 : | |||
665 : | if(scale_fac == 1 || data == 0) | ||
666 : | return data; | ||
667 : | |||
668 : | res = BitstreamGetBits(bs, fcode - 1); | ||
669 : | mv = ((ABS(data) - 1) * scale_fac) + res + 1; | ||
670 : | |||
671 : | return data < 0 ? -mv : mv; | ||
672 : | edgomez | 78 | |
673 : | Isibaar | 3 | } |
674 : | |||
675 : | int get_dc_dif(Bitstream * bs, uint32_t dc_size) | ||
676 : | { | ||
677 : | edgomez | 78 | |
678 : | Isibaar | 3 | int code = BitstreamGetBits(bs, dc_size); |
679 : | int msb = code >> (dc_size - 1); | ||
680 : | |||
681 : | if(msb == 0) | ||
682 : | return (-1 * (code^((1 << dc_size) - 1))); | ||
683 : | |||
684 : | return code; | ||
685 : | edgomez | 78 | |
686 : | Isibaar | 3 | } |
687 : | |||
688 : | int get_dc_size_lum(Bitstream * bs) | ||
689 : | { | ||
690 : | edgomez | 78 | |
691 : | Isibaar | 3 | int code, i; |
692 : | code = BitstreamShowBits(bs, 11); | ||
693 : | |||
694 : | for(i = 11; i > 3; i--) { | ||
695 : | if(code == 1) { | ||
696 : | BitstreamSkip(bs, i); | ||
697 : | return i + 1; | ||
698 : | } | ||
699 : | code >>= 1; | ||
700 : | } | ||
701 : | |||
702 : | BitstreamSkip(bs, dc_lum_tab[code].len); | ||
703 : | return dc_lum_tab[code].code; | ||
704 : | edgomez | 78 | |
705 : | Isibaar | 3 | } |
706 : | |||
707 : | |||
708 : | int get_dc_size_chrom(Bitstream * bs) | ||
709 : | { | ||
710 : | edgomez | 78 | |
711 : | Isibaar | 3 | uint32_t code, i; |
712 : | code = BitstreamShowBits(bs, 12); | ||
713 : | |||
714 : | for(i = 12; i > 2; i--) { | ||
715 : | if(code == 1) { | ||
716 : | BitstreamSkip(bs, i); | ||
717 : | return i; | ||
718 : | } | ||
719 : | code >>= 1; | ||
720 : | } | ||
721 : | |||
722 : | return 3 - BitstreamGetBits(bs, 2); | ||
723 : | edgomez | 78 | |
724 : | Isibaar | 3 | } |
725 : | |||
726 : | void get_intra_block(Bitstream * bs, int16_t * block, int direction, int coeff) | ||
727 : | { | ||
728 : | edgomez | 78 | |
729 : | Isibaar | 3 | const uint16_t * scan = scan_tables[ direction ]; |
730 : | int level; | ||
731 : | int run; | ||
732 : | int last; | ||
733 : | |||
734 : | do | ||
735 : | { | ||
736 : | level = get_coeff(bs, &run, &last, 1, 0); | ||
737 : | if (run == -1) | ||
738 : | { | ||
739 : | DEBUG("fatal: invalid run"); | ||
740 : | break; | ||
741 : | } | ||
742 : | coeff += run; | ||
743 : | block[ scan[coeff] ] = level; | ||
744 : | if (level < -127 || level > 127) | ||
745 : | { | ||
746 : | DEBUG1("warning: intra_overflow", level); | ||
747 : | } | ||
748 : | coeff++; | ||
749 : | } while (!last); | ||
750 : | edgomez | 78 | |
751 : | Isibaar | 3 | } |
752 : | |||
753 : | void get_inter_block(Bitstream * bs, int16_t * block) | ||
754 : | { | ||
755 : | edgomez | 78 | |
756 : | Isibaar | 3 | const uint16_t * scan = scan_tables[0]; |
757 : | int p; | ||
758 : | int level; | ||
759 : | int run; | ||
760 : | int last; | ||
761 : | |||
762 : | p = 0; | ||
763 : | do | ||
764 : | { | ||
765 : | level = get_coeff(bs, &run, &last, 0, 0); | ||
766 : | if (run == -1) | ||
767 : | { | ||
768 : | DEBUG("fatal: invalid run"); | ||
769 : | break; | ||
770 : | } | ||
771 : | p += run; | ||
772 : | block[ scan[p] ] = level; | ||
773 : | if (level < -127 || level > 127) | ||
774 : | { | ||
775 : | DEBUG1("warning: inter_overflow", level); | ||
776 : | } | ||
777 : | p++; | ||
778 : | } while (!last); | ||
779 : | edgomez | 78 | |
780 : | Isibaar | 3 | } |
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