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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 : | edgomez | 195 | static void |
284 : | 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 : | Isibaar | 3 | bits = BitstreamPos(bs); |
334 : | |||
335 : | edgomez | 195 | CodeCoeff(bs, &qcoeff[i * 64], intra_table, |
336 : | scan_tables[pMB->acpred_directions[i]], 1); | ||
337 : | Isibaar | 3 | |
338 : | bits = BitstreamPos(bs) - bits; | ||
339 : | pStat->iTextBits += bits; | ||
340 : | } | ||
341 : | } | ||
342 : | edgomez | 78 | |
343 : | Isibaar | 3 | } |
344 : | |||
345 : | |||
346 : | edgomez | 195 | static void |
347 : | CodeBlockInter(const FRAMEINFO * frame, | ||
348 : | const MACROBLOCK * pMB, | ||
349 : | int16_t qcoeff[6 * 64], | ||
350 : | edgomez | 78 | Bitstream * bs, |
351 : | Statistics * pStat) | ||
352 : | Isibaar | 3 | { |
353 : | edgomez | 78 | |
354 : | Isibaar | 3 | int32_t i; |
355 : | uint32_t bits, mcbpc, cbpy; | ||
356 : | |||
357 : | edgomez | 78 | mcbpc = (pMB->mode & 7) | ((pMB->cbp & 3) << 3); |
358 : | Isibaar | 3 | cbpy = 15 - (pMB->cbp >> 2); |
359 : | |||
360 : | // write mcbpc | ||
361 : | edgomez | 195 | BitstreamPutBits(bs, mcbpc_inter_tab[mcbpc].code, |
362 : | mcbpc_inter_tab[mcbpc].len); | ||
363 : | Isibaar | 3 | |
364 : | // write cbpy | ||
365 : | BitstreamPutBits(bs, cbpy_tab[cbpy].code, cbpy_tab[cbpy].len); | ||
366 : | |||
367 : | // write dquant | ||
368 : | edgomez | 195 | if (pMB->mode == MODE_INTER_Q) |
369 : | Isibaar | 3 | BitstreamPutBits(bs, pMB->dquant, 2); |
370 : | edgomez | 195 | |
371 : | h | 69 | // interlacing |
372 : | edgomez | 195 | if (frame->global_flags & XVID_INTERLACING) { |
373 : | h | 69 | BitstreamPutBit(bs, pMB->field_dct); |
374 : | DEBUG1("codep: field_dct: ", pMB->field_dct); | ||
375 : | |||
376 : | // if inter block, write field ME flag | ||
377 : | edgomez | 195 | if (pMB->mode == MODE_INTER || pMB->mode == MODE_INTER_Q) { |
378 : | h | 69 | BitstreamPutBit(bs, pMB->field_pred); |
379 : | DEBUG1("codep: field_pred: ", pMB->field_pred); | ||
380 : | |||
381 : | // write field prediction references | ||
382 : | edgomez | 195 | if (pMB->field_pred) { |
383 : | h | 69 | BitstreamPutBit(bs, pMB->field_for_top); |
384 : | BitstreamPutBit(bs, pMB->field_for_bot); | ||
385 : | } | ||
386 : | } | ||
387 : | } | ||
388 : | Isibaar | 3 | // code motion vector(s) |
389 : | edgomez | 195 | for (i = 0; i < (pMB->mode == MODE_INTER4V ? 4 : 1); i++) { |
390 : | suxen_drol | 136 | CodeVector(bs, pMB->pmvs[i].x, frame->fcode, pStat); |
391 : | CodeVector(bs, pMB->pmvs[i].y, frame->fcode, pStat); | ||
392 : | Isibaar | 3 | } |
393 : | |||
394 : | bits = BitstreamPos(bs); | ||
395 : | edgomez | 195 | |
396 : | Isibaar | 3 | // code block coeffs |
397 : | edgomez | 195 | for (i = 0; i < 6; i++) |
398 : | if (pMB->cbp & (1 << (5 - i))) | ||
399 : | CodeCoeff(bs, &qcoeff[i * 64], inter_table, scan_tables[0], 0); | ||
400 : | Isibaar | 3 | |
401 : | bits = BitstreamPos(bs) - bits; | ||
402 : | pStat->iTextBits += bits; | ||
403 : | edgomez | 78 | |
404 : | Isibaar | 3 | } |
405 : | |||
406 : | |||
407 : | edgomez | 195 | void |
408 : | MBCoding(const FRAMEINFO * frame, | ||
409 : | MACROBLOCK * pMB, | ||
410 : | int16_t qcoeff[6 * 64], | ||
411 : | Bitstream * bs, | ||
412 : | Statistics * pStat) | ||
413 : | Isibaar | 3 | { |
414 : | edgomez | 78 | |
415 : | edgomez | 195 | if (frame->coding_type == P_VOP) { |
416 : | if (pMB->cbp == 0 && pMB->mode == MODE_INTER && pMB->mvs[0].x == 0 && | ||
417 : | pMB->mvs[0].y == 0) { | ||
418 : | chl | 335 | |
419 : | #ifdef _DISABLE_SKIP | ||
420 : | /* disable SKIP when Bframes active until some workaround for the B-SKIP problem is found */ | ||
421 : | BitstreamPutBit(bs, 0); // always coded! | ||
422 : | #else | ||
423 : | edgomez | 195 | BitstreamPutBit(bs, 1); // not_coded |
424 : | chl | 335 | |
425 : | Isibaar | 3 | return; |
426 : | chl | 335 | #endif |
427 : | edgomez | 195 | } else |
428 : | BitstreamPutBit(bs, 0); // coded | ||
429 : | Isibaar | 3 | } |
430 : | |||
431 : | chl | 335 | if (pMB->mode == MODE_INTRA || pMB->mode == MODE_INTRA_Q) |
432 : | suxen_drol | 136 | CodeBlockIntra(frame, pMB, qcoeff, bs, pStat); |
433 : | Isibaar | 3 | else |
434 : | suxen_drol | 136 | CodeBlockInter(frame, pMB, qcoeff, bs, pStat); |
435 : | edgomez | 78 | |
436 : | Isibaar | 3 | } |
437 : | |||
438 : | suxen_drol | 118 | /*************************************************************** |
439 : | * bframe encoding start | ||
440 : | ***************************************************************/ | ||
441 : | Isibaar | 3 | |
442 : | suxen_drol | 118 | /* |
443 : | mbtype | ||
444 : | 0 1b direct(h263) mvdb | ||
445 : | 1 01b interpolate mc+q dbquant, mvdf, mvdb | ||
446 : | 2 001b backward mc+q dbquant, mvdb | ||
447 : | 3 0001b forward mc+q dbquant, mvdf | ||
448 : | */ | ||
449 : | |||
450 : | edgomez | 195 | void |
451 : | put_bvop_mbtype(Bitstream * bs, | ||
452 : | int value) | ||
453 : | suxen_drol | 118 | { |
454 : | edgomez | 195 | switch (value) { |
455 : | case 0: | ||
456 : | BitstreamPutBit(bs, 1); | ||
457 : | return; | ||
458 : | suxen_drol | 118 | |
459 : | edgomez | 195 | case 1: |
460 : | BitstreamPutBit(bs, 0); | ||
461 : | BitstreamPutBit(bs, 1); | ||
462 : | return; | ||
463 : | suxen_drol | 118 | |
464 : | edgomez | 195 | case 2: |
465 : | BitstreamPutBit(bs, 0); | ||
466 : | BitstreamPutBit(bs, 0); | ||
467 : | BitstreamPutBit(bs, 1); | ||
468 : | return; | ||
469 : | suxen_drol | 118 | |
470 : | edgomez | 195 | case 3: |
471 : | BitstreamPutBit(bs, 0); | ||
472 : | BitstreamPutBit(bs, 0); | ||
473 : | BitstreamPutBit(bs, 0); | ||
474 : | BitstreamPutBit(bs, 1); | ||
475 : | return; | ||
476 : | |||
477 : | default:; // invalid! | ||
478 : | |||
479 : | suxen_drol | 118 | } |
480 : | edgomez | 195 | |
481 : | suxen_drol | 118 | } |
482 : | |||
483 : | /* | ||
484 : | dbquant | ||
485 : | -2 10b | ||
486 : | 0 0b | ||
487 : | +2 11b | ||
488 : | */ | ||
489 : | |||
490 : | edgomez | 195 | void |
491 : | put_bvop_dbquant(Bitstream * bs, | ||
492 : | int value) | ||
493 : | suxen_drol | 118 | { |
494 : | edgomez | 195 | switch (value) { |
495 : | case 0: | ||
496 : | BitstreamPutBit(bs, 0); | ||
497 : | return; | ||
498 : | suxen_drol | 118 | |
499 : | edgomez | 195 | case -2: |
500 : | BitstreamPutBit(bs, 1); | ||
501 : | BitstreamPutBit(bs, 0); | ||
502 : | return; | ||
503 : | suxen_drol | 118 | |
504 : | edgomez | 195 | case 2: |
505 : | BitstreamPutBit(bs, 1); | ||
506 : | BitstreamPutBit(bs, 1); | ||
507 : | return; | ||
508 : | |||
509 : | default:; // invalid | ||
510 : | suxen_drol | 118 | } |
511 : | } | ||
512 : | |||
513 : | |||
514 : | |||
515 : | edgomez | 195 | void |
516 : | MBCodingBVOP(const MACROBLOCK * mb, | ||
517 : | const int16_t qcoeff[6 * 64], | ||
518 : | const int32_t fcode, | ||
519 : | const int32_t bcode, | ||
520 : | Bitstream * bs, | ||
521 : | Statistics * pStat) | ||
522 : | suxen_drol | 118 | { |
523 : | int i; | ||
524 : | |||
525 : | /* ------------------------------------------------------------------ | ||
526 : | chl | 313 | when a block is skipped it is decoded DIRECT(0,0) |
527 : | hence is interpolated from forward & backward frames | ||
528 : | suxen_drol | 118 | ------------------------------------------------------------------ */ |
529 : | |||
530 : | chl | 313 | if (mb->mode == MODE_DIRECT_NONE_MV) { |
531 : | edgomez | 195 | BitstreamPutBit(bs, 1); // skipped |
532 : | suxen_drol | 118 | return; |
533 : | } | ||
534 : | |||
535 : | BitstreamPutBit(bs, 0); // not skipped | ||
536 : | |||
537 : | edgomez | 195 | if (mb->cbp == 0) { |
538 : | BitstreamPutBit(bs, 1); // cbp == 0 | ||
539 : | } else { | ||
540 : | BitstreamPutBit(bs, 0); // cbp == xxx | ||
541 : | suxen_drol | 118 | } |
542 : | |||
543 : | put_bvop_mbtype(bs, mb->mode); | ||
544 : | |||
545 : | edgomez | 195 | if (mb->cbp) { |
546 : | suxen_drol | 118 | BitstreamPutBits(bs, mb->cbp, 6); |
547 : | } | ||
548 : | |||
549 : | edgomez | 195 | if (mb->mode != MODE_DIRECT && mb->cbp != 0) { |
550 : | put_bvop_dbquant(bs, 0); // todo: mb->dquant = 0 | ||
551 : | suxen_drol | 118 | } |
552 : | |||
553 : | edgomez | 195 | if (mb->mode == MODE_INTERPOLATE || mb->mode == MODE_FORWARD) { |
554 : | CodeVector(bs, mb->pmvs[0].x, fcode, pStat); | ||
555 : | CodeVector(bs, mb->pmvs[0].y, fcode, pStat); | ||
556 : | suxen_drol | 118 | } |
557 : | |||
558 : | edgomez | 195 | if (mb->mode == MODE_INTERPOLATE || mb->mode == MODE_BACKWARD) { |
559 : | CodeVector(bs, mb->b_pmvs[0].x, bcode, pStat); | ||
560 : | CodeVector(bs, mb->b_pmvs[0].y, bcode, pStat); | ||
561 : | suxen_drol | 118 | } |
562 : | |||
563 : | edgomez | 195 | if (mb->mode == MODE_DIRECT) { |
564 : | chl | 313 | CodeVector(bs, mb->mvs[0].x, 1, pStat); /* fcode is always 1 for delta vector */ |
565 : | CodeVector(bs, mb->mvs[0].y, 1, pStat); /* prediction is always (0,0) */ | ||
566 : | suxen_drol | 118 | } |
567 : | edgomez | 195 | |
568 : | for (i = 0; i < 6; i++) { | ||
569 : | if (mb->cbp & (1 << (5 - i))) { | ||
570 : | CodeCoeff(bs, &qcoeff[i * 64], inter_table, scan_tables[0], 0); | ||
571 : | suxen_drol | 118 | } |
572 : | edgomez | 195 | } |
573 : | suxen_drol | 118 | } |
574 : | |||
575 : | |||
576 : | |||
577 : | Isibaar | 3 | /*************************************************************** |
578 : | edgomez | 15 | * decoding stuff starts here * |
579 : | ***************************************************************/ | ||
580 : | Isibaar | 3 | |
581 : | suxen_drol | 248 | |
582 : | // for IVOP addbits == 0 | ||
583 : | // for PVOP addbits == fcode - 1 | ||
584 : | // for BVOP addbits == max(fcode,bcode) - 1 | ||
585 : | // returns true or false | ||
586 : | int | ||
587 : | check_resync_marker(Bitstream * bs, int addbits) | ||
588 : | { | ||
589 : | uint32_t nbits; | ||
590 : | uint32_t code; | ||
591 : | uint32_t nbitsresyncmarker = NUMBITS_VP_RESYNC_MARKER + addbits; | ||
592 : | |||
593 : | nbits = BitstreamNumBitsToByteAlign(bs); | ||
594 : | code = BitstreamShowBits(bs, nbits); | ||
595 : | |||
596 : | if (code == (((uint32_t)1 << (nbits - 1)) - 1)) | ||
597 : | { | ||
598 : | return BitstreamShowBitsFromByteAlign(bs, nbitsresyncmarker) == RESYNC_MARKER; | ||
599 : | } | ||
600 : | |||
601 : | return 0; | ||
602 : | } | ||
603 : | |||
604 : | |||
605 : | |||
606 : | edgomez | 195 | int |
607 : | get_mcbpc_intra(Bitstream * bs) | ||
608 : | Isibaar | 3 | { |
609 : | edgomez | 78 | |
610 : | Isibaar | 3 | uint32_t index; |
611 : | edgomez | 195 | |
612 : | suxen_drol | 248 | index = BitstreamShowBits(bs, 9); |
613 : | Isibaar | 3 | index >>= 3; |
614 : | |||
615 : | BitstreamSkip(bs, mcbpc_intra_table[index].len); | ||
616 : | edgomez | 78 | |
617 : | Isibaar | 3 | return mcbpc_intra_table[index].code; |
618 : | edgomez | 78 | |
619 : | Isibaar | 3 | } |
620 : | |||
621 : | edgomez | 195 | int |
622 : | get_mcbpc_inter(Bitstream * bs) | ||
623 : | Isibaar | 3 | { |
624 : | edgomez | 78 | |
625 : | Isibaar | 3 | uint32_t index; |
626 : | suxen_drol | 248 | |
627 : | index = CLIP(BitstreamShowBits(bs, 9), 256); | ||
628 : | edgomez | 195 | |
629 : | BitstreamSkip(bs, mcbpc_inter_table[index].len); | ||
630 : | edgomez | 78 | |
631 : | Isibaar | 3 | return mcbpc_inter_table[index].code; |
632 : | edgomez | 78 | |
633 : | Isibaar | 3 | } |
634 : | |||
635 : | edgomez | 195 | int |
636 : | get_cbpy(Bitstream * bs, | ||
637 : | int intra) | ||
638 : | Isibaar | 3 | { |
639 : | edgomez | 78 | |
640 : | Isibaar | 3 | int cbpy; |
641 : | uint32_t index = BitstreamShowBits(bs, 6); | ||
642 : | |||
643 : | BitstreamSkip(bs, cbpy_table[index].len); | ||
644 : | cbpy = cbpy_table[index].code; | ||
645 : | |||
646 : | edgomez | 195 | if (!intra) |
647 : | Isibaar | 3 | cbpy = 15 - cbpy; |
648 : | |||
649 : | return cbpy; | ||
650 : | edgomez | 78 | |
651 : | Isibaar | 3 | } |
652 : | |||
653 : | edgomez | 195 | int |
654 : | get_mv_data(Bitstream * bs) | ||
655 : | Isibaar | 3 | { |
656 : | edgomez | 78 | |
657 : | Isibaar | 3 | uint32_t index; |
658 : | |||
659 : | edgomez | 195 | if (BitstreamGetBit(bs)) |
660 : | Isibaar | 3 | return 0; |
661 : | edgomez | 195 | |
662 : | Isibaar | 3 | index = BitstreamShowBits(bs, 12); |
663 : | |||
664 : | edgomez | 195 | if (index >= 512) { |
665 : | Isibaar | 3 | index = (index >> 8) - 2; |
666 : | BitstreamSkip(bs, TMNMVtab0[index].len); | ||
667 : | return TMNMVtab0[index].code; | ||
668 : | } | ||
669 : | edgomez | 195 | |
670 : | if (index >= 128) { | ||
671 : | Isibaar | 3 | index = (index >> 2) - 32; |
672 : | BitstreamSkip(bs, TMNMVtab1[index].len); | ||
673 : | return TMNMVtab1[index].code; | ||
674 : | } | ||
675 : | |||
676 : | edgomez | 195 | index -= 4; |
677 : | Isibaar | 3 | |
678 : | BitstreamSkip(bs, TMNMVtab2[index].len); | ||
679 : | return TMNMVtab2[index].code; | ||
680 : | edgomez | 78 | |
681 : | Isibaar | 3 | } |
682 : | |||
683 : | edgomez | 195 | int |
684 : | get_mv(Bitstream * bs, | ||
685 : | int fcode) | ||
686 : | Isibaar | 3 | { |
687 : | edgomez | 78 | |
688 : | Isibaar | 3 | int data; |
689 : | int res; | ||
690 : | int mv; | ||
691 : | int scale_fac = 1 << (fcode - 1); | ||
692 : | |||
693 : | data = get_mv_data(bs); | ||
694 : | edgomez | 195 | |
695 : | if (scale_fac == 1 || data == 0) | ||
696 : | Isibaar | 3 | return data; |
697 : | |||
698 : | res = BitstreamGetBits(bs, fcode - 1); | ||
699 : | mv = ((ABS(data) - 1) * scale_fac) + res + 1; | ||
700 : | edgomez | 195 | |
701 : | Isibaar | 3 | return data < 0 ? -mv : mv; |
702 : | edgomez | 78 | |
703 : | Isibaar | 3 | } |
704 : | |||
705 : | edgomez | 195 | int |
706 : | get_dc_dif(Bitstream * bs, | ||
707 : | uint32_t dc_size) | ||
708 : | Isibaar | 3 | { |
709 : | edgomez | 78 | |
710 : | Isibaar | 3 | int code = BitstreamGetBits(bs, dc_size); |
711 : | int msb = code >> (dc_size - 1); | ||
712 : | |||
713 : | edgomez | 195 | if (msb == 0) |
714 : | return (-1 * (code ^ ((1 << dc_size) - 1))); | ||
715 : | Isibaar | 3 | |
716 : | return code; | ||
717 : | edgomez | 78 | |
718 : | Isibaar | 3 | } |
719 : | |||
720 : | edgomez | 195 | int |
721 : | get_dc_size_lum(Bitstream * bs) | ||
722 : | Isibaar | 3 | { |
723 : | edgomez | 78 | |
724 : | Isibaar | 3 | int code, i; |
725 : | edgomez | 195 | |
726 : | Isibaar | 3 | code = BitstreamShowBits(bs, 11); |
727 : | |||
728 : | edgomez | 195 | for (i = 11; i > 3; i--) { |
729 : | if (code == 1) { | ||
730 : | Isibaar | 3 | BitstreamSkip(bs, i); |
731 : | return i + 1; | ||
732 : | } | ||
733 : | code >>= 1; | ||
734 : | } | ||
735 : | |||
736 : | BitstreamSkip(bs, dc_lum_tab[code].len); | ||
737 : | return dc_lum_tab[code].code; | ||
738 : | edgomez | 78 | |
739 : | Isibaar | 3 | } |
740 : | |||
741 : | |||
742 : | edgomez | 195 | int |
743 : | get_dc_size_chrom(Bitstream * bs) | ||
744 : | Isibaar | 3 | { |
745 : | edgomez | 78 | |
746 : | Isibaar | 3 | uint32_t code, i; |
747 : | edgomez | 195 | |
748 : | Isibaar | 3 | code = BitstreamShowBits(bs, 12); |
749 : | |||
750 : | edgomez | 195 | for (i = 12; i > 2; i--) { |
751 : | if (code == 1) { | ||
752 : | Isibaar | 3 | BitstreamSkip(bs, i); |
753 : | return i; | ||
754 : | } | ||
755 : | code >>= 1; | ||
756 : | } | ||
757 : | |||
758 : | return 3 - BitstreamGetBits(bs, 2); | ||
759 : | edgomez | 78 | |
760 : | Isibaar | 3 | } |
761 : | |||
762 : | edgomez | 195 | void |
763 : | get_intra_block(Bitstream * bs, | ||
764 : | int16_t * block, | ||
765 : | int direction, | ||
766 : | int coeff) | ||
767 : | Isibaar | 3 | { |
768 : | edgomez | 78 | |
769 : | edgomez | 195 | const uint16_t *scan = scan_tables[direction]; |
770 : | Isibaar | 3 | int level; |
771 : | int run; | ||
772 : | int last; | ||
773 : | |||
774 : | edgomez | 195 | do { |
775 : | Isibaar | 3 | level = get_coeff(bs, &run, &last, 1, 0); |
776 : | edgomez | 195 | if (run == -1) { |
777 : | Isibaar | 3 | DEBUG("fatal: invalid run"); |
778 : | break; | ||
779 : | } | ||
780 : | coeff += run; | ||
781 : | edgomez | 195 | block[scan[coeff]] = level; |
782 : | suxen_drol | 252 | |
783 : | DPRINTF(DPRINTF_COEFF,"block[%i] %i", scan[coeff], level); | ||
784 : | //DPRINTF(DPRINTF_COEFF,"block[%i] %i %08x", scan[coeff], level, BitstreamShowBits(bs, 32)); | ||
785 : | |||
786 : | edgomez | 195 | if (level < -127 || level > 127) { |
787 : | Isibaar | 3 | DEBUG1("warning: intra_overflow", level); |
788 : | } | ||
789 : | coeff++; | ||
790 : | } while (!last); | ||
791 : | edgomez | 78 | |
792 : | Isibaar | 3 | } |
793 : | |||
794 : | edgomez | 195 | void |
795 : | get_inter_block(Bitstream * bs, | ||
796 : | int16_t * block) | ||
797 : | Isibaar | 3 | { |
798 : | edgomez | 78 | |
799 : | edgomez | 195 | const uint16_t *scan = scan_tables[0]; |
800 : | Isibaar | 3 | int p; |
801 : | int level; | ||
802 : | int run; | ||
803 : | int last; | ||
804 : | |||
805 : | p = 0; | ||
806 : | edgomez | 195 | do { |
807 : | Isibaar | 3 | level = get_coeff(bs, &run, &last, 0, 0); |
808 : | edgomez | 195 | if (run == -1) { |
809 : | Isibaar | 3 | DEBUG("fatal: invalid run"); |
810 : | break; | ||
811 : | } | ||
812 : | p += run; | ||
813 : | chenm001 | 161 | |
814 : | edgomez | 195 | block[scan[p]] = level; |
815 : | suxen_drol | 252 | |
816 : | DPRINTF(DPRINTF_COEFF,"block[%i] %i", scan[p], level); | ||
817 : | // DPRINTF(DPRINTF_COEFF,"block[%i] %i %08x", scan[p], level, BitstreamShowBits(bs, 32)); | ||
818 : | |||
819 : | edgomez | 195 | if (level < -127 || level > 127) { |
820 : | Isibaar | 3 | DEBUG1("warning: inter_overflow", level); |
821 : | } | ||
822 : | p++; | ||
823 : | } while (!last); | ||
824 : | edgomez | 78 | |
825 : | Isibaar | 3 | } |
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