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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 : | suxen_drol | 248 | * 28.06.2002 added check_resync_marker() * |
45 : | Isibaar | 153 | * 14.04.2002 bframe encoding * |
46 : | suxen_drol | 118 | * 08.03.2002 initial version; isibaar * |
47 : | * * | ||
48 : | ******************************************************************************/ | ||
49 : | |||
50 : | |||
51 : | |||
52 : | Isibaar | 100 | #include <stdlib.h> |
53 : | Isibaar | 3 | #include "../portab.h" |
54 : | #include "bitstream.h" | ||
55 : | #include "zigzag.h" | ||
56 : | #include "vlc_codes.h" | ||
57 : | Isibaar | 100 | #include "mbcoding.h" |
58 : | Isibaar | 3 | |
59 : | #include "../utils/mbfunctions.h" | ||
60 : | |||
61 : | #define ABS(X) (((X)>0)?(X):-(X)) | ||
62 : | #define CLIP(X,A) (X > A) ? (A) : (X) | ||
63 : | |||
64 : | edgomez | 195 | VLC intra_table[524032]; |
65 : | Isibaar | 153 | VLC inter_table[524032]; |
66 : | Isibaar | 100 | |
67 : | Isibaar | 114 | VLC DCT3Dintra[4096]; |
68 : | VLC DCT3Dinter[4096]; | ||
69 : | Isibaar | 3 | |
70 : | edgomez | 195 | void |
71 : | init_vlc_tables(void) | ||
72 : | Isibaar | 3 | { |
73 : | edgomez | 78 | |
74 : | Isibaar | 3 | int32_t k, l, i, intra, last; |
75 : | VLC *vlc[2]; | ||
76 : | VLC **coeff_ptr; | ||
77 : | VLC *vlc1, *vlc2; | ||
78 : | |||
79 : | vlc1 = DCT3Dintra; | ||
80 : | vlc2 = DCT3Dinter; | ||
81 : | edgomez | 195 | |
82 : | Isibaar | 100 | vlc[0] = intra_table; |
83 : | vlc[1] = inter_table; | ||
84 : | edgomez | 195 | |
85 : | Isibaar | 100 | // generate encoding vlc lookup tables |
86 : | Isibaar | 153 | // the lookup table idea is taken from the excellent fame project by Vivien Chapellier |
87 : | edgomez | 195 | for (i = 0; i < 4; i++) { |
88 : | Isibaar | 3 | intra = i % 2; |
89 : | Isibaar | 100 | last = i / 2; |
90 : | Isibaar | 3 | |
91 : | Isibaar | 100 | coeff_ptr = coeff_vlc[last + 2 * intra]; |
92 : | edgomez | 195 | |
93 : | for (k = -2047; k < 2048; k++) { // level | ||
94 : | Isibaar | 100 | int8_t *max_level_ptr = max_level[last + 2 * intra]; |
95 : | int8_t *max_run_ptr = max_run[last + 2 * intra]; | ||
96 : | edgomez | 195 | |
97 : | for (l = 0; l < 64; l++) { // run | ||
98 : | Isibaar | 35 | int32_t level = k; |
99 : | Isibaar | 209 | ptr_t run = l; |
100 : | edgomez | 195 | |
101 : | if ((abs(level) <= max_level_ptr[run]) && (run <= (uint32_t) max_run_ptr[abs(level)])) { // level < max_level and run < max_run | ||
102 : | |||
103 : | vlc[intra]->code = 0; | ||
104 : | vlc[intra]->len = 0; | ||
105 : | goto loop_end; | ||
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 : | edgomez | 195 | if ((abs(level) <= max_level_ptr[run]) && |
113 : | (run <= (uint32_t) max_run_ptr[abs(level)])) { | ||
114 : | |||
115 : | Isibaar | 100 | vlc[intra]->code = 0x06; |
116 : | vlc[intra]->len = 8; | ||
117 : | goto loop_end; | ||
118 : | } | ||
119 : | Isibaar | 3 | |
120 : | edgomez | 195 | if (level > 0) // still here? |
121 : | level += max_level_ptr[run]; // restore level | ||
122 : | Isibaar | 100 | else |
123 : | level -= max_level_ptr[run]; | ||
124 : | |||
125 : | edgomez | 195 | run -= max_run_ptr[abs(level)] + 1; // and change run |
126 : | Isibaar | 100 | |
127 : | edgomez | 195 | if ((abs(level) <= max_level_ptr[run]) && |
128 : | (run <= (uint32_t) max_run_ptr[abs(level)])) { | ||
129 : | |||
130 : | Isibaar | 100 | 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 : | edgomez | 195 | vlc[intra]->code = |
138 : | (uint32_t) ((l << 14) | (0x1e + last) << 20) | (1 << 13) | | ||
139 : | ((k & 0xfff) << 1) | 1; | ||
140 : | Isibaar | 100 | |
141 : | vlc[intra]->len = 30; | ||
142 : | Isibaar | 3 | vlc[intra]++; |
143 : | Isibaar | 100 | continue; |
144 : | |||
145 : | edgomez | 195 | loop_end: |
146 : | if (level != 0) { | ||
147 : | vlc[intra]->code = | ||
148 : | (vlc[intra]-> | ||
149 : | code << (coeff_ptr[run][abs(level) - 1].len + | ||
150 : | 1)) | (coeff_ptr[run][abs(level) - | ||
151 : | 1].code << 1); | ||
152 : | vlc[intra]->len = | ||
153 : | (coeff_ptr[run][abs(level) - 1].len + 1) + | ||
154 : | vlc[intra]->len; | ||
155 : | Isibaar | 100 | |
156 : | edgomez | 195 | if (level < 0) |
157 : | Isibaar | 100 | vlc[intra]->code += 1; |
158 : | } | ||
159 : | |||
160 : | vlc[intra]++; | ||
161 : | Isibaar | 3 | } |
162 : | } | ||
163 : | } | ||
164 : | edgomez | 78 | |
165 : | edgomez | 195 | for (i = 0; i < 4096; i++) { |
166 : | if (i >= 512) { | ||
167 : | Isibaar | 3 | *vlc1 = DCT3Dtab3[(i >> 5) - 16]; |
168 : | *vlc2 = DCT3Dtab0[(i >> 5) - 16]; | ||
169 : | edgomez | 195 | } else if (i >= 128) { |
170 : | Isibaar | 3 | *vlc1 = DCT3Dtab4[(i >> 2) - 32]; |
171 : | *vlc2 = DCT3Dtab1[(i >> 2) - 32]; | ||
172 : | edgomez | 195 | } else if (i >= 8) { |
173 : | Isibaar | 3 | *vlc1 = DCT3Dtab5[i - 8]; |
174 : | *vlc2 = DCT3Dtab2[i - 8]; | ||
175 : | edgomez | 195 | } else { |
176 : | Isibaar | 3 | *vlc1 = ERRtab[i]; |
177 : | *vlc2 = ERRtab[i]; | ||
178 : | } | ||
179 : | |||
180 : | vlc1++; | ||
181 : | vlc2++; | ||
182 : | } | ||
183 : | DCT3D[0] = DCT3Dinter; | ||
184 : | DCT3D[1] = DCT3Dintra; | ||
185 : | |||
186 : | } | ||
187 : | |||
188 : | edgomez | 195 | static __inline void |
189 : | CodeVector(Bitstream * bs, | ||
190 : | int32_t value, | ||
191 : | int32_t f_code, | ||
192 : | Statistics * pStat) | ||
193 : | Isibaar | 3 | { |
194 : | edgomez | 78 | |
195 : | Isibaar | 3 | const int scale_factor = 1 << (f_code - 1); |
196 : | const int cmp = scale_factor << 5; | ||
197 : | |||
198 : | edgomez | 195 | if (value < (-1 * cmp)) |
199 : | Isibaar | 3 | value += 64 * scale_factor; |
200 : | edgomez | 195 | |
201 : | if (value > (cmp - 1)) | ||
202 : | Isibaar | 3 | value -= 64 * scale_factor; |
203 : | |||
204 : | edgomez | 78 | pStat->iMvSum += value * value; |
205 : | pStat->iMvCount++; | ||
206 : | Isibaar | 3 | |
207 : | edgomez | 78 | if (value == 0) { |
208 : | edgomez | 195 | BitstreamPutBits(bs, mb_motion_table[32].code, |
209 : | mb_motion_table[32].len); | ||
210 : | edgomez | 78 | } else { |
211 : | Isibaar | 3 | uint16_t length, code, mv_res, sign; |
212 : | edgomez | 195 | |
213 : | Isibaar | 3 | length = 16 << f_code; |
214 : | f_code--; | ||
215 : | edgomez | 195 | |
216 : | Isibaar | 3 | sign = (value < 0); |
217 : | |||
218 : | edgomez | 195 | if (value >= length) |
219 : | Isibaar | 3 | value -= 2 * length; |
220 : | edgomez | 195 | else if (value < -length) |
221 : | Isibaar | 3 | value += 2 * length; |
222 : | |||
223 : | edgomez | 195 | if (sign) |
224 : | Isibaar | 3 | value = -value; |
225 : | |||
226 : | value--; | ||
227 : | mv_res = value & ((1 << f_code) - 1); | ||
228 : | code = ((value - mv_res) >> f_code) + 1; | ||
229 : | |||
230 : | edgomez | 195 | if (sign) |
231 : | Isibaar | 3 | code = -code; |
232 : | |||
233 : | code += 32; | ||
234 : | edgomez | 195 | BitstreamPutBits(bs, mb_motion_table[code].code, |
235 : | mb_motion_table[code].len); | ||
236 : | |||
237 : | if (f_code) | ||
238 : | Isibaar | 3 | BitstreamPutBits(bs, mv_res, f_code); |
239 : | edgomez | 78 | } |
240 : | |||
241 : | Isibaar | 3 | } |
242 : | |||
243 : | |||
244 : | edgomez | 195 | static __inline void |
245 : | CodeCoeff(Bitstream * bs, | ||
246 : | const int16_t qcoeff[64], | ||
247 : | VLC * table, | ||
248 : | const uint16_t * zigzag, | ||
249 : | uint16_t intra) | ||
250 : | edgomez | 78 | { |
251 : | |||
252 : | Isibaar | 3 | uint32_t j, last; |
253 : | short v; | ||
254 : | VLC *vlc; | ||
255 : | edgomez | 195 | |
256 : | Isibaar | 3 | j = intra; |
257 : | Isibaar | 116 | last = intra; |
258 : | Isibaar | 3 | |
259 : | edgomez | 195 | while (j < 64 && (v = qcoeff[zigzag[j]]) == 0) |
260 : | j++; | ||
261 : | |||
262 : | Isibaar | 3 | do { |
263 : | Isibaar | 153 | vlc = table + 64 * 2047 + (v << 6) + j - last; |
264 : | Isibaar | 116 | last = ++j; |
265 : | Isibaar | 153 | |
266 : | // count zeroes | ||
267 : | edgomez | 195 | while (j < 64 && (v = qcoeff[zigzag[j]]) == 0) |
268 : | j++; | ||
269 : | |||
270 : | Isibaar | 3 | // write code |
271 : | edgomez | 195 | if (j != 64) { |
272 : | Isibaar | 3 | BitstreamPutBits(bs, vlc->code, vlc->len); |
273 : | } else { | ||
274 : | Isibaar | 153 | vlc += 64 * 4095; |
275 : | Isibaar | 3 | BitstreamPutBits(bs, vlc->code, vlc->len); |
276 : | break; | ||
277 : | } | ||
278 : | edgomez | 195 | } while (1); |
279 : | edgomez | 78 | |
280 : | Isibaar | 3 | } |
281 : | |||
282 : | |||
283 : | chl | 530 | static __inline void |
284 : | edgomez | 195 | CodeBlockIntra(const FRAMEINFO * frame, |
285 : | const MACROBLOCK * pMB, | ||
286 : | int16_t qcoeff[6 * 64], | ||
287 : | edgomez | 78 | Bitstream * bs, |
288 : | Statistics * pStat) | ||
289 : | Isibaar | 3 | { |
290 : | edgomez | 78 | |
291 : | Isibaar | 3 | uint32_t i, mcbpc, cbpy, bits; |
292 : | |||
293 : | cbpy = pMB->cbp >> 2; | ||
294 : | |||
295 : | edgomez | 78 | // write mcbpc |
296 : | edgomez | 195 | if (frame->coding_type == I_VOP) { |
297 : | edgomez | 78 | mcbpc = ((pMB->mode >> 1) & 3) | ((pMB->cbp & 3) << 2); |
298 : | edgomez | 195 | BitstreamPutBits(bs, mcbpc_intra_tab[mcbpc].code, |
299 : | mcbpc_intra_tab[mcbpc].len); | ||
300 : | } else { | ||
301 : | edgomez | 78 | mcbpc = (pMB->mode & 7) | ((pMB->cbp & 3) << 3); |
302 : | edgomez | 195 | BitstreamPutBits(bs, mcbpc_inter_tab[mcbpc].code, |
303 : | mcbpc_inter_tab[mcbpc].len); | ||
304 : | Isibaar | 28 | } |
305 : | Isibaar | 3 | |
306 : | // ac prediction flag | ||
307 : | edgomez | 195 | if (pMB->acpred_directions[0]) |
308 : | edgomez | 78 | BitstreamPutBits(bs, 1, 1); |
309 : | Isibaar | 3 | else |
310 : | edgomez | 78 | BitstreamPutBits(bs, 0, 1); |
311 : | Isibaar | 3 | |
312 : | edgomez | 78 | // write cbpy |
313 : | edgomez | 195 | BitstreamPutBits(bs, cbpy_tab[cbpy].code, cbpy_tab[cbpy].len); |
314 : | Isibaar | 3 | |
315 : | // write dquant | ||
316 : | edgomez | 195 | if (pMB->mode == MODE_INTRA_Q) |
317 : | Isibaar | 3 | BitstreamPutBits(bs, pMB->dquant, 2); |
318 : | |||
319 : | h | 69 | // write interlacing |
320 : | edgomez | 195 | if (frame->global_flags & XVID_INTERLACING) { |
321 : | h | 69 | BitstreamPutBit(bs, pMB->field_dct); |
322 : | } | ||
323 : | Isibaar | 3 | // code block coeffs |
324 : | edgomez | 195 | for (i = 0; i < 6; i++) { |
325 : | if (i < 4) | ||
326 : | BitstreamPutBits(bs, dcy_tab[qcoeff[i * 64 + 0] + 255].code, | ||
327 : | dcy_tab[qcoeff[i * 64 + 0] + 255].len); | ||
328 : | Isibaar | 3 | else |
329 : | edgomez | 195 | BitstreamPutBits(bs, dcc_tab[qcoeff[i * 64 + 0] + 255].code, |
330 : | dcc_tab[qcoeff[i * 64 + 0] + 255].len); | ||
331 : | |||
332 : | if (pMB->cbp & (1 << (5 - i))) { | ||
333 : | h | 543 | const uint16_t *scan_table = |
334 : | frame->global_flags & XVID_ALTERNATESCAN ? | ||
335 : | scan_tables[2] : scan_tables[pMB->acpred_directions[i]]; | ||
336 : | |||
337 : | Isibaar | 3 | bits = BitstreamPos(bs); |
338 : | |||
339 : | h | 543 | CodeCoeff(bs, &qcoeff[i * 64], intra_table, scan_table, 1); |
340 : | Isibaar | 3 | |
341 : | bits = BitstreamPos(bs) - bits; | ||
342 : | pStat->iTextBits += bits; | ||
343 : | } | ||
344 : | } | ||
345 : | edgomez | 78 | |
346 : | Isibaar | 3 | } |
347 : | |||
348 : | |||
349 : | edgomez | 195 | static void |
350 : | CodeBlockInter(const FRAMEINFO * frame, | ||
351 : | const MACROBLOCK * pMB, | ||
352 : | int16_t qcoeff[6 * 64], | ||
353 : | edgomez | 78 | Bitstream * bs, |
354 : | Statistics * pStat) | ||
355 : | Isibaar | 3 | { |
356 : | edgomez | 78 | |
357 : | Isibaar | 3 | int32_t i; |
358 : | uint32_t bits, mcbpc, cbpy; | ||
359 : | |||
360 : | edgomez | 78 | mcbpc = (pMB->mode & 7) | ((pMB->cbp & 3) << 3); |
361 : | Isibaar | 3 | cbpy = 15 - (pMB->cbp >> 2); |
362 : | |||
363 : | // write mcbpc | ||
364 : | edgomez | 195 | BitstreamPutBits(bs, mcbpc_inter_tab[mcbpc].code, |
365 : | mcbpc_inter_tab[mcbpc].len); | ||
366 : | Isibaar | 3 | |
367 : | // write cbpy | ||
368 : | BitstreamPutBits(bs, cbpy_tab[cbpy].code, cbpy_tab[cbpy].len); | ||
369 : | |||
370 : | // write dquant | ||
371 : | edgomez | 195 | if (pMB->mode == MODE_INTER_Q) |
372 : | Isibaar | 3 | BitstreamPutBits(bs, pMB->dquant, 2); |
373 : | edgomez | 195 | |
374 : | h | 69 | // interlacing |
375 : | edgomez | 195 | if (frame->global_flags & XVID_INTERLACING) { |
376 : | h | 388 | if (pMB->cbp) { |
377 : | BitstreamPutBit(bs, pMB->field_dct); | ||
378 : | DEBUG1("codep: field_dct: ", pMB->field_dct); | ||
379 : | } | ||
380 : | h | 69 | |
381 : | // if inter block, write field ME flag | ||
382 : | edgomez | 195 | if (pMB->mode == MODE_INTER || pMB->mode == MODE_INTER_Q) { |
383 : | h | 69 | BitstreamPutBit(bs, pMB->field_pred); |
384 : | DEBUG1("codep: field_pred: ", pMB->field_pred); | ||
385 : | |||
386 : | // write field prediction references | ||
387 : | edgomez | 195 | if (pMB->field_pred) { |
388 : | h | 69 | BitstreamPutBit(bs, pMB->field_for_top); |
389 : | BitstreamPutBit(bs, pMB->field_for_bot); | ||
390 : | } | ||
391 : | } | ||
392 : | } | ||
393 : | Isibaar | 3 | // code motion vector(s) |
394 : | edgomez | 195 | for (i = 0; i < (pMB->mode == MODE_INTER4V ? 4 : 1); i++) { |
395 : | suxen_drol | 136 | CodeVector(bs, pMB->pmvs[i].x, frame->fcode, pStat); |
396 : | CodeVector(bs, pMB->pmvs[i].y, frame->fcode, pStat); | ||
397 : | Isibaar | 3 | } |
398 : | |||
399 : | bits = BitstreamPos(bs); | ||
400 : | edgomez | 195 | |
401 : | Isibaar | 3 | // code block coeffs |
402 : | edgomez | 195 | for (i = 0; i < 6; i++) |
403 : | if (pMB->cbp & (1 << (5 - i))) | ||
404 : | h | 543 | { |
405 : | const uint16_t *scan_table = | ||
406 : | frame->global_flags & XVID_ALTERNATESCAN ? | ||
407 : | scan_tables[2] : scan_tables[0]; | ||
408 : | Isibaar | 3 | |
409 : | h | 543 | CodeCoeff(bs, &qcoeff[i * 64], inter_table, scan_table, 0); |
410 : | } | ||
411 : | |||
412 : | Isibaar | 3 | bits = BitstreamPos(bs) - bits; |
413 : | pStat->iTextBits += bits; | ||
414 : | edgomez | 78 | |
415 : | Isibaar | 3 | } |
416 : | |||
417 : | |||
418 : | edgomez | 195 | void |
419 : | MBCoding(const FRAMEINFO * frame, | ||
420 : | MACROBLOCK * pMB, | ||
421 : | int16_t qcoeff[6 * 64], | ||
422 : | Bitstream * bs, | ||
423 : | Statistics * pStat) | ||
424 : | Isibaar | 3 | { |
425 : | edgomez | 78 | |
426 : | edgomez | 195 | if (frame->coding_type == P_VOP) { |
427 : | BitstreamPutBit(bs, 0); // coded | ||
428 : | Isibaar | 3 | } |
429 : | |||
430 : | chl | 335 | if (pMB->mode == MODE_INTRA || pMB->mode == MODE_INTRA_Q) |
431 : | suxen_drol | 136 | CodeBlockIntra(frame, pMB, qcoeff, bs, pStat); |
432 : | Isibaar | 3 | else |
433 : | suxen_drol | 136 | CodeBlockInter(frame, pMB, qcoeff, bs, pStat); |
434 : | edgomez | 78 | |
435 : | Isibaar | 3 | } |
436 : | |||
437 : | chl | 530 | /* |
438 : | // moved to mbcoding.h so that in can be 'static __inline' | ||
439 : | chl | 347 | void |
440 : | MBSkip(Bitstream * bs) | ||
441 : | { | ||
442 : | BitstreamPutBit(bs, 1); // not coded | ||
443 : | } | ||
444 : | chl | 530 | */ |
445 : | chl | 347 | |
446 : | suxen_drol | 118 | /*************************************************************** |
447 : | * bframe encoding start | ||
448 : | ***************************************************************/ | ||
449 : | Isibaar | 3 | |
450 : | suxen_drol | 118 | /* |
451 : | mbtype | ||
452 : | 0 1b direct(h263) mvdb | ||
453 : | 1 01b interpolate mc+q dbquant, mvdf, mvdb | ||
454 : | 2 001b backward mc+q dbquant, mvdb | ||
455 : | 3 0001b forward mc+q dbquant, mvdf | ||
456 : | */ | ||
457 : | |||
458 : | chl | 530 | static __inline void |
459 : | edgomez | 195 | put_bvop_mbtype(Bitstream * bs, |
460 : | int value) | ||
461 : | suxen_drol | 118 | { |
462 : | edgomez | 195 | switch (value) { |
463 : | chl | 530 | case MODE_FORWARD: |
464 : | BitstreamPutBit(bs, 0); | ||
465 : | case MODE_BACKWARD: | ||
466 : | BitstreamPutBit(bs, 0); | ||
467 : | case MODE_INTERPOLATE: | ||
468 : | BitstreamPutBit(bs, 0); | ||
469 : | case MODE_DIRECT: | ||
470 : | BitstreamPutBit(bs, 1); | ||
471 : | default: | ||
472 : | break; | ||
473 : | suxen_drol | 118 | } |
474 : | } | ||
475 : | |||
476 : | /* | ||
477 : | dbquant | ||
478 : | -2 10b | ||
479 : | 0 0b | ||
480 : | +2 11b | ||
481 : | */ | ||
482 : | |||
483 : | chl | 530 | static __inline void |
484 : | edgomez | 195 | put_bvop_dbquant(Bitstream * bs, |
485 : | int value) | ||
486 : | suxen_drol | 118 | { |
487 : | edgomez | 195 | switch (value) { |
488 : | case 0: | ||
489 : | BitstreamPutBit(bs, 0); | ||
490 : | return; | ||
491 : | suxen_drol | 118 | |
492 : | edgomez | 195 | case -2: |
493 : | BitstreamPutBit(bs, 1); | ||
494 : | BitstreamPutBit(bs, 0); | ||
495 : | return; | ||
496 : | suxen_drol | 118 | |
497 : | edgomez | 195 | case 2: |
498 : | BitstreamPutBit(bs, 1); | ||
499 : | BitstreamPutBit(bs, 1); | ||
500 : | return; | ||
501 : | |||
502 : | default:; // invalid | ||
503 : | suxen_drol | 118 | } |
504 : | } | ||
505 : | |||
506 : | |||
507 : | |||
508 : | edgomez | 195 | void |
509 : | MBCodingBVOP(const MACROBLOCK * mb, | ||
510 : | const int16_t qcoeff[6 * 64], | ||
511 : | const int32_t fcode, | ||
512 : | const int32_t bcode, | ||
513 : | Bitstream * bs, | ||
514 : | h | 543 | Statistics * pStat, |
515 : | int direction) | ||
516 : | suxen_drol | 118 | { |
517 : | chl | 530 | int vcode = fcode; |
518 : | unsigned int i; | ||
519 : | suxen_drol | 118 | |
520 : | /* ------------------------------------------------------------------ | ||
521 : | chl | 313 | when a block is skipped it is decoded DIRECT(0,0) |
522 : | hence is interpolated from forward & backward frames | ||
523 : | suxen_drol | 118 | ------------------------------------------------------------------ */ |
524 : | |||
525 : | chl | 313 | if (mb->mode == MODE_DIRECT_NONE_MV) { |
526 : | edgomez | 195 | BitstreamPutBit(bs, 1); // skipped |
527 : | suxen_drol | 118 | return; |
528 : | } | ||
529 : | |||
530 : | BitstreamPutBit(bs, 0); // not skipped | ||
531 : | |||
532 : | edgomez | 195 | if (mb->cbp == 0) { |
533 : | BitstreamPutBit(bs, 1); // cbp == 0 | ||
534 : | } else { | ||
535 : | BitstreamPutBit(bs, 0); // cbp == xxx | ||
536 : | suxen_drol | 118 | } |
537 : | |||
538 : | put_bvop_mbtype(bs, mb->mode); | ||
539 : | |||
540 : | edgomez | 195 | if (mb->cbp) { |
541 : | suxen_drol | 118 | BitstreamPutBits(bs, mb->cbp, 6); |
542 : | } | ||
543 : | |||
544 : | edgomez | 195 | if (mb->mode != MODE_DIRECT && mb->cbp != 0) { |
545 : | put_bvop_dbquant(bs, 0); // todo: mb->dquant = 0 | ||
546 : | suxen_drol | 118 | } |
547 : | |||
548 : | chl | 530 | switch (mb->mode) { |
549 : | case MODE_INTERPOLATE: | ||
550 : | CodeVector(bs, mb->pmvs[1].x, vcode, pStat); //forward vector of interpolate mode | ||
551 : | CodeVector(bs, mb->pmvs[1].y, vcode, pStat); | ||
552 : | case MODE_BACKWARD: | ||
553 : | vcode = bcode; | ||
554 : | case MODE_FORWARD: | ||
555 : | CodeVector(bs, mb->pmvs[0].x, vcode, pStat); | ||
556 : | CodeVector(bs, mb->pmvs[0].y, vcode, pStat); | ||
557 : | break; | ||
558 : | case MODE_DIRECT: | ||
559 : | CodeVector(bs, mb->pmvs[3].x, 1, pStat); // fcode is always 1 for delta vector | ||
560 : | CodeVector(bs, mb->pmvs[3].y, 1, pStat); // prediction is always (0,0) | ||
561 : | default: break; | ||
562 : | suxen_drol | 118 | } |
563 : | |||
564 : | edgomez | 195 | for (i = 0; i < 6; i++) { |
565 : | if (mb->cbp & (1 << (5 - i))) { | ||
566 : | h | 543 | CodeCoeff(bs, &qcoeff[i * 64], inter_table, scan_tables[direction], 0); |
567 : | suxen_drol | 118 | } |
568 : | edgomez | 195 | } |
569 : | suxen_drol | 118 | } |
570 : | |||
571 : | |||
572 : | |||
573 : | Isibaar | 3 | /*************************************************************** |
574 : | edgomez | 15 | * decoding stuff starts here * |
575 : | ***************************************************************/ | ||
576 : | Isibaar | 3 | |
577 : | suxen_drol | 248 | |
578 : | // for IVOP addbits == 0 | ||
579 : | // for PVOP addbits == fcode - 1 | ||
580 : | // for BVOP addbits == max(fcode,bcode) - 1 | ||
581 : | // returns true or false | ||
582 : | int | ||
583 : | check_resync_marker(Bitstream * bs, int addbits) | ||
584 : | { | ||
585 : | uint32_t nbits; | ||
586 : | uint32_t code; | ||
587 : | uint32_t nbitsresyncmarker = NUMBITS_VP_RESYNC_MARKER + addbits; | ||
588 : | |||
589 : | nbits = BitstreamNumBitsToByteAlign(bs); | ||
590 : | code = BitstreamShowBits(bs, nbits); | ||
591 : | |||
592 : | if (code == (((uint32_t)1 << (nbits - 1)) - 1)) | ||
593 : | { | ||
594 : | return BitstreamShowBitsFromByteAlign(bs, nbitsresyncmarker) == RESYNC_MARKER; | ||
595 : | } | ||
596 : | |||
597 : | return 0; | ||
598 : | } | ||
599 : | |||
600 : | |||
601 : | |||
602 : | edgomez | 195 | int |
603 : | get_mcbpc_intra(Bitstream * bs) | ||
604 : | Isibaar | 3 | { |
605 : | edgomez | 78 | |
606 : | Isibaar | 3 | uint32_t index; |
607 : | edgomez | 195 | |
608 : | suxen_drol | 248 | index = BitstreamShowBits(bs, 9); |
609 : | Isibaar | 3 | index >>= 3; |
610 : | |||
611 : | BitstreamSkip(bs, mcbpc_intra_table[index].len); | ||
612 : | edgomez | 78 | |
613 : | Isibaar | 3 | return mcbpc_intra_table[index].code; |
614 : | edgomez | 78 | |
615 : | Isibaar | 3 | } |
616 : | |||
617 : | edgomez | 195 | int |
618 : | get_mcbpc_inter(Bitstream * bs) | ||
619 : | Isibaar | 3 | { |
620 : | edgomez | 78 | |
621 : | Isibaar | 3 | uint32_t index; |
622 : | suxen_drol | 248 | |
623 : | index = CLIP(BitstreamShowBits(bs, 9), 256); | ||
624 : | edgomez | 195 | |
625 : | BitstreamSkip(bs, mcbpc_inter_table[index].len); | ||
626 : | edgomez | 78 | |
627 : | Isibaar | 3 | return mcbpc_inter_table[index].code; |
628 : | edgomez | 78 | |
629 : | Isibaar | 3 | } |
630 : | |||
631 : | edgomez | 195 | int |
632 : | get_cbpy(Bitstream * bs, | ||
633 : | int intra) | ||
634 : | Isibaar | 3 | { |
635 : | edgomez | 78 | |
636 : | Isibaar | 3 | int cbpy; |
637 : | uint32_t index = BitstreamShowBits(bs, 6); | ||
638 : | |||
639 : | BitstreamSkip(bs, cbpy_table[index].len); | ||
640 : | cbpy = cbpy_table[index].code; | ||
641 : | |||
642 : | edgomez | 195 | if (!intra) |
643 : | Isibaar | 3 | cbpy = 15 - cbpy; |
644 : | |||
645 : | return cbpy; | ||
646 : | edgomez | 78 | |
647 : | Isibaar | 3 | } |
648 : | |||
649 : | chl | 530 | static __inline int |
650 : | edgomez | 195 | get_mv_data(Bitstream * bs) |
651 : | Isibaar | 3 | { |
652 : | edgomez | 78 | |
653 : | Isibaar | 3 | uint32_t index; |
654 : | |||
655 : | edgomez | 195 | if (BitstreamGetBit(bs)) |
656 : | Isibaar | 3 | return 0; |
657 : | edgomez | 195 | |
658 : | Isibaar | 3 | index = BitstreamShowBits(bs, 12); |
659 : | |||
660 : | edgomez | 195 | if (index >= 512) { |
661 : | Isibaar | 3 | index = (index >> 8) - 2; |
662 : | BitstreamSkip(bs, TMNMVtab0[index].len); | ||
663 : | return TMNMVtab0[index].code; | ||
664 : | } | ||
665 : | edgomez | 195 | |
666 : | if (index >= 128) { | ||
667 : | Isibaar | 3 | index = (index >> 2) - 32; |
668 : | BitstreamSkip(bs, TMNMVtab1[index].len); | ||
669 : | return TMNMVtab1[index].code; | ||
670 : | } | ||
671 : | |||
672 : | edgomez | 195 | index -= 4; |
673 : | Isibaar | 3 | |
674 : | BitstreamSkip(bs, TMNMVtab2[index].len); | ||
675 : | return TMNMVtab2[index].code; | ||
676 : | edgomez | 78 | |
677 : | Isibaar | 3 | } |
678 : | |||
679 : | edgomez | 195 | int |
680 : | get_mv(Bitstream * bs, | ||
681 : | int fcode) | ||
682 : | Isibaar | 3 | { |
683 : | edgomez | 78 | |
684 : | Isibaar | 3 | int data; |
685 : | int res; | ||
686 : | int mv; | ||
687 : | int scale_fac = 1 << (fcode - 1); | ||
688 : | |||
689 : | data = get_mv_data(bs); | ||
690 : | edgomez | 195 | |
691 : | if (scale_fac == 1 || data == 0) | ||
692 : | Isibaar | 3 | return data; |
693 : | |||
694 : | res = BitstreamGetBits(bs, fcode - 1); | ||
695 : | mv = ((ABS(data) - 1) * scale_fac) + res + 1; | ||
696 : | edgomez | 195 | |
697 : | Isibaar | 3 | return data < 0 ? -mv : mv; |
698 : | edgomez | 78 | |
699 : | Isibaar | 3 | } |
700 : | |||
701 : | edgomez | 195 | int |
702 : | get_dc_dif(Bitstream * bs, | ||
703 : | uint32_t dc_size) | ||
704 : | Isibaar | 3 | { |
705 : | edgomez | 78 | |
706 : | Isibaar | 3 | int code = BitstreamGetBits(bs, dc_size); |
707 : | int msb = code >> (dc_size - 1); | ||
708 : | |||
709 : | edgomez | 195 | if (msb == 0) |
710 : | return (-1 * (code ^ ((1 << dc_size) - 1))); | ||
711 : | Isibaar | 3 | |
712 : | return code; | ||
713 : | edgomez | 78 | |
714 : | Isibaar | 3 | } |
715 : | |||
716 : | edgomez | 195 | int |
717 : | get_dc_size_lum(Bitstream * bs) | ||
718 : | Isibaar | 3 | { |
719 : | edgomez | 78 | |
720 : | Isibaar | 3 | int code, i; |
721 : | edgomez | 195 | |
722 : | Isibaar | 3 | code = BitstreamShowBits(bs, 11); |
723 : | |||
724 : | edgomez | 195 | for (i = 11; i > 3; i--) { |
725 : | if (code == 1) { | ||
726 : | Isibaar | 3 | BitstreamSkip(bs, i); |
727 : | return i + 1; | ||
728 : | } | ||
729 : | code >>= 1; | ||
730 : | } | ||
731 : | |||
732 : | BitstreamSkip(bs, dc_lum_tab[code].len); | ||
733 : | return dc_lum_tab[code].code; | ||
734 : | edgomez | 78 | |
735 : | Isibaar | 3 | } |
736 : | |||
737 : | |||
738 : | edgomez | 195 | int |
739 : | get_dc_size_chrom(Bitstream * bs) | ||
740 : | Isibaar | 3 | { |
741 : | edgomez | 78 | |
742 : | Isibaar | 3 | uint32_t code, i; |
743 : | edgomez | 195 | |
744 : | Isibaar | 3 | code = BitstreamShowBits(bs, 12); |
745 : | |||
746 : | edgomez | 195 | for (i = 12; i > 2; i--) { |
747 : | if (code == 1) { | ||
748 : | Isibaar | 3 | BitstreamSkip(bs, i); |
749 : | return i; | ||
750 : | } | ||
751 : | code >>= 1; | ||
752 : | } | ||
753 : | |||
754 : | return 3 - BitstreamGetBits(bs, 2); | ||
755 : | edgomez | 78 | |
756 : | Isibaar | 3 | } |
757 : | |||
758 : | edgomez | 195 | void |
759 : | get_intra_block(Bitstream * bs, | ||
760 : | int16_t * block, | ||
761 : | int direction, | ||
762 : | int coeff) | ||
763 : | Isibaar | 3 | { |
764 : | edgomez | 78 | |
765 : | edgomez | 195 | const uint16_t *scan = scan_tables[direction]; |
766 : | chl | 530 | int level, run, last; |
767 : | Isibaar | 3 | |
768 : | edgomez | 195 | do { |
769 : | Isibaar | 3 | level = get_coeff(bs, &run, &last, 1, 0); |
770 : | edgomez | 195 | if (run == -1) { |
771 : | Isibaar | 3 | DEBUG("fatal: invalid run"); |
772 : | break; | ||
773 : | } | ||
774 : | coeff += run; | ||
775 : | edgomez | 195 | block[scan[coeff]] = level; |
776 : | suxen_drol | 252 | |
777 : | DPRINTF(DPRINTF_COEFF,"block[%i] %i", scan[coeff], level); | ||
778 : | //DPRINTF(DPRINTF_COEFF,"block[%i] %i %08x", scan[coeff], level, BitstreamShowBits(bs, 32)); | ||
779 : | |||
780 : | edgomez | 195 | if (level < -127 || level > 127) { |
781 : | Isibaar | 3 | DEBUG1("warning: intra_overflow", level); |
782 : | } | ||
783 : | coeff++; | ||
784 : | } while (!last); | ||
785 : | edgomez | 78 | |
786 : | Isibaar | 3 | } |
787 : | |||
788 : | edgomez | 195 | void |
789 : | get_inter_block(Bitstream * bs, | ||
790 : | h | 543 | int16_t * block, |
791 : | int direction) | ||
792 : | Isibaar | 3 | { |
793 : | edgomez | 78 | |
794 : | h | 543 | const uint16_t *scan = scan_tables[direction]; |
795 : | Isibaar | 3 | int p; |
796 : | int level; | ||
797 : | int run; | ||
798 : | int last; | ||
799 : | |||
800 : | p = 0; | ||
801 : | edgomez | 195 | do { |
802 : | Isibaar | 3 | level = get_coeff(bs, &run, &last, 0, 0); |
803 : | edgomez | 195 | if (run == -1) { |
804 : | Isibaar | 3 | DEBUG("fatal: invalid run"); |
805 : | break; | ||
806 : | } | ||
807 : | p += run; | ||
808 : | chenm001 | 161 | |
809 : | edgomez | 195 | block[scan[p]] = level; |
810 : | suxen_drol | 252 | |
811 : | DPRINTF(DPRINTF_COEFF,"block[%i] %i", scan[p], level); | ||
812 : | // DPRINTF(DPRINTF_COEFF,"block[%i] %i %08x", scan[p], level, BitstreamShowBits(bs, 32)); | ||
813 : | |||
814 : | edgomez | 195 | if (level < -127 || level > 127) { |
815 : | Isibaar | 3 | DEBUG1("warning: inter_overflow", level); |
816 : | } | ||
817 : | p++; | ||
818 : | } while (!last); | ||
819 : | edgomez | 78 | |
820 : | Isibaar | 3 | } |
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