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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 : | 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 : | edgomez | 195 | VLC intra_table[524032]; |
64 : | Isibaar | 153 | VLC inter_table[524032]; |
65 : | Isibaar | 100 | |
66 : | Isibaar | 114 | VLC DCT3Dintra[4096]; |
67 : | VLC DCT3Dinter[4096]; | ||
68 : | Isibaar | 3 | |
69 : | edgomez | 195 | void |
70 : | init_vlc_tables(void) | ||
71 : | Isibaar | 3 | { |
72 : | edgomez | 78 | |
73 : | Isibaar | 3 | int32_t k, l, i, intra, last; |
74 : | VLC *vlc[2]; | ||
75 : | VLC **coeff_ptr; | ||
76 : | VLC *vlc1, *vlc2; | ||
77 : | |||
78 : | vlc1 = DCT3Dintra; | ||
79 : | vlc2 = DCT3Dinter; | ||
80 : | edgomez | 195 | |
81 : | Isibaar | 100 | vlc[0] = intra_table; |
82 : | vlc[1] = inter_table; | ||
83 : | edgomez | 195 | |
84 : | Isibaar | 100 | // generate encoding vlc lookup tables |
85 : | Isibaar | 153 | // the lookup table idea is taken from the excellent fame project by Vivien Chapellier |
86 : | edgomez | 195 | for (i = 0; i < 4; i++) { |
87 : | Isibaar | 3 | intra = i % 2; |
88 : | Isibaar | 100 | last = i / 2; |
89 : | Isibaar | 3 | |
90 : | Isibaar | 100 | coeff_ptr = coeff_vlc[last + 2 * intra]; |
91 : | edgomez | 195 | |
92 : | for (k = -2047; k < 2048; k++) { // level | ||
93 : | Isibaar | 100 | int8_t *max_level_ptr = max_level[last + 2 * intra]; |
94 : | int8_t *max_run_ptr = max_run[last + 2 * intra]; | ||
95 : | edgomez | 195 | |
96 : | for (l = 0; l < 64; l++) { // run | ||
97 : | Isibaar | 35 | int32_t level = k; |
98 : | Isibaar | 209 | ptr_t run = l; |
99 : | edgomez | 195 | |
100 : | if ((abs(level) <= max_level_ptr[run]) && (run <= (uint32_t) max_run_ptr[abs(level)])) { // level < max_level and run < max_run | ||
101 : | |||
102 : | vlc[intra]->code = 0; | ||
103 : | vlc[intra]->len = 0; | ||
104 : | goto loop_end; | ||
105 : | } else { | ||
106 : | if (level > 0) // correct level | ||
107 : | Isibaar | 3 | level -= max_level_ptr[run]; |
108 : | else | ||
109 : | level += max_level_ptr[run]; | ||
110 : | Isibaar | 35 | |
111 : | edgomez | 195 | if ((abs(level) <= max_level_ptr[run]) && |
112 : | (run <= (uint32_t) max_run_ptr[abs(level)])) { | ||
113 : | |||
114 : | Isibaar | 100 | vlc[intra]->code = 0x06; |
115 : | vlc[intra]->len = 8; | ||
116 : | goto loop_end; | ||
117 : | } | ||
118 : | Isibaar | 3 | |
119 : | edgomez | 195 | if (level > 0) // still here? |
120 : | level += max_level_ptr[run]; // restore level | ||
121 : | Isibaar | 100 | else |
122 : | level -= max_level_ptr[run]; | ||
123 : | |||
124 : | edgomez | 195 | run -= max_run_ptr[abs(level)] + 1; // and change run |
125 : | Isibaar | 100 | |
126 : | edgomez | 195 | if ((abs(level) <= max_level_ptr[run]) && |
127 : | (run <= (uint32_t) max_run_ptr[abs(level)])) { | ||
128 : | |||
129 : | Isibaar | 100 | vlc[intra]->code = 0x0e; |
130 : | vlc[intra]->len = 9; | ||
131 : | goto loop_end; | ||
132 : | Isibaar | 3 | } |
133 : | Isibaar | 100 | run += max_run_ptr[abs(level)] + 1; |
134 : | Isibaar | 3 | } |
135 : | Isibaar | 100 | |
136 : | edgomez | 195 | vlc[intra]->code = |
137 : | (uint32_t) ((l << 14) | (0x1e + last) << 20) | (1 << 13) | | ||
138 : | ((k & 0xfff) << 1) | 1; | ||
139 : | Isibaar | 100 | |
140 : | vlc[intra]->len = 30; | ||
141 : | Isibaar | 3 | vlc[intra]++; |
142 : | Isibaar | 100 | continue; |
143 : | |||
144 : | edgomez | 195 | loop_end: |
145 : | if (level != 0) { | ||
146 : | vlc[intra]->code = | ||
147 : | (vlc[intra]-> | ||
148 : | code << (coeff_ptr[run][abs(level) - 1].len + | ||
149 : | 1)) | (coeff_ptr[run][abs(level) - | ||
150 : | 1].code << 1); | ||
151 : | vlc[intra]->len = | ||
152 : | (coeff_ptr[run][abs(level) - 1].len + 1) + | ||
153 : | vlc[intra]->len; | ||
154 : | Isibaar | 100 | |
155 : | edgomez | 195 | if (level < 0) |
156 : | Isibaar | 100 | vlc[intra]->code += 1; |
157 : | } | ||
158 : | |||
159 : | vlc[intra]++; | ||
160 : | Isibaar | 3 | } |
161 : | } | ||
162 : | } | ||
163 : | edgomez | 78 | |
164 : | edgomez | 195 | for (i = 0; i < 4096; i++) { |
165 : | if (i >= 512) { | ||
166 : | Isibaar | 3 | *vlc1 = DCT3Dtab3[(i >> 5) - 16]; |
167 : | *vlc2 = DCT3Dtab0[(i >> 5) - 16]; | ||
168 : | edgomez | 195 | } else if (i >= 128) { |
169 : | Isibaar | 3 | *vlc1 = DCT3Dtab4[(i >> 2) - 32]; |
170 : | *vlc2 = DCT3Dtab1[(i >> 2) - 32]; | ||
171 : | edgomez | 195 | } else if (i >= 8) { |
172 : | Isibaar | 3 | *vlc1 = DCT3Dtab5[i - 8]; |
173 : | *vlc2 = DCT3Dtab2[i - 8]; | ||
174 : | edgomez | 195 | } else { |
175 : | Isibaar | 3 | *vlc1 = ERRtab[i]; |
176 : | *vlc2 = ERRtab[i]; | ||
177 : | } | ||
178 : | |||
179 : | vlc1++; | ||
180 : | vlc2++; | ||
181 : | } | ||
182 : | DCT3D[0] = DCT3Dinter; | ||
183 : | DCT3D[1] = DCT3Dintra; | ||
184 : | |||
185 : | } | ||
186 : | |||
187 : | edgomez | 195 | static __inline void |
188 : | CodeVector(Bitstream * bs, | ||
189 : | int32_t value, | ||
190 : | int32_t f_code, | ||
191 : | Statistics * pStat) | ||
192 : | Isibaar | 3 | { |
193 : | edgomez | 78 | |
194 : | Isibaar | 3 | const int scale_factor = 1 << (f_code - 1); |
195 : | const int cmp = scale_factor << 5; | ||
196 : | |||
197 : | edgomez | 195 | if (value < (-1 * cmp)) |
198 : | Isibaar | 3 | value += 64 * scale_factor; |
199 : | edgomez | 195 | |
200 : | if (value > (cmp - 1)) | ||
201 : | Isibaar | 3 | value -= 64 * scale_factor; |
202 : | |||
203 : | edgomez | 78 | pStat->iMvSum += value * value; |
204 : | pStat->iMvCount++; | ||
205 : | Isibaar | 3 | |
206 : | edgomez | 78 | if (value == 0) { |
207 : | edgomez | 195 | BitstreamPutBits(bs, mb_motion_table[32].code, |
208 : | mb_motion_table[32].len); | ||
209 : | edgomez | 78 | } else { |
210 : | Isibaar | 3 | uint16_t length, code, mv_res, sign; |
211 : | edgomez | 195 | |
212 : | Isibaar | 3 | length = 16 << f_code; |
213 : | f_code--; | ||
214 : | edgomez | 195 | |
215 : | Isibaar | 3 | sign = (value < 0); |
216 : | |||
217 : | edgomez | 195 | if (value >= length) |
218 : | Isibaar | 3 | value -= 2 * length; |
219 : | edgomez | 195 | else if (value < -length) |
220 : | Isibaar | 3 | value += 2 * length; |
221 : | |||
222 : | edgomez | 195 | if (sign) |
223 : | Isibaar | 3 | value = -value; |
224 : | |||
225 : | value--; | ||
226 : | mv_res = value & ((1 << f_code) - 1); | ||
227 : | code = ((value - mv_res) >> f_code) + 1; | ||
228 : | |||
229 : | edgomez | 195 | if (sign) |
230 : | Isibaar | 3 | code = -code; |
231 : | |||
232 : | code += 32; | ||
233 : | edgomez | 195 | BitstreamPutBits(bs, mb_motion_table[code].code, |
234 : | mb_motion_table[code].len); | ||
235 : | |||
236 : | if (f_code) | ||
237 : | Isibaar | 3 | BitstreamPutBits(bs, mv_res, f_code); |
238 : | edgomez | 78 | } |
239 : | |||
240 : | Isibaar | 3 | } |
241 : | |||
242 : | |||
243 : | edgomez | 195 | static __inline void |
244 : | CodeCoeff(Bitstream * bs, | ||
245 : | const int16_t qcoeff[64], | ||
246 : | VLC * table, | ||
247 : | const uint16_t * zigzag, | ||
248 : | uint16_t intra) | ||
249 : | edgomez | 78 | { |
250 : | |||
251 : | Isibaar | 3 | uint32_t j, last; |
252 : | short v; | ||
253 : | VLC *vlc; | ||
254 : | edgomez | 195 | |
255 : | Isibaar | 3 | j = intra; |
256 : | Isibaar | 116 | last = intra; |
257 : | Isibaar | 3 | |
258 : | edgomez | 195 | while (j < 64 && (v = qcoeff[zigzag[j]]) == 0) |
259 : | j++; | ||
260 : | |||
261 : | Isibaar | 3 | do { |
262 : | Isibaar | 153 | vlc = table + 64 * 2047 + (v << 6) + j - last; |
263 : | Isibaar | 116 | last = ++j; |
264 : | Isibaar | 153 | |
265 : | // count zeroes | ||
266 : | edgomez | 195 | while (j < 64 && (v = qcoeff[zigzag[j]]) == 0) |
267 : | j++; | ||
268 : | |||
269 : | Isibaar | 3 | // write code |
270 : | edgomez | 195 | if (j != 64) { |
271 : | Isibaar | 3 | BitstreamPutBits(bs, vlc->code, vlc->len); |
272 : | } else { | ||
273 : | Isibaar | 153 | vlc += 64 * 4095; |
274 : | Isibaar | 3 | BitstreamPutBits(bs, vlc->code, vlc->len); |
275 : | break; | ||
276 : | } | ||
277 : | edgomez | 195 | } while (1); |
278 : | edgomez | 78 | |
279 : | Isibaar | 3 | } |
280 : | |||
281 : | |||
282 : | edgomez | 195 | static void |
283 : | CodeBlockIntra(const FRAMEINFO * frame, | ||
284 : | const MACROBLOCK * pMB, | ||
285 : | int16_t qcoeff[6 * 64], | ||
286 : | edgomez | 78 | Bitstream * bs, |
287 : | Statistics * pStat) | ||
288 : | Isibaar | 3 | { |
289 : | edgomez | 78 | |
290 : | Isibaar | 3 | uint32_t i, mcbpc, cbpy, bits; |
291 : | |||
292 : | cbpy = pMB->cbp >> 2; | ||
293 : | |||
294 : | edgomez | 78 | // write mcbpc |
295 : | edgomez | 195 | if (frame->coding_type == I_VOP) { |
296 : | edgomez | 78 | mcbpc = ((pMB->mode >> 1) & 3) | ((pMB->cbp & 3) << 2); |
297 : | edgomez | 195 | BitstreamPutBits(bs, mcbpc_intra_tab[mcbpc].code, |
298 : | mcbpc_intra_tab[mcbpc].len); | ||
299 : | } else { | ||
300 : | edgomez | 78 | mcbpc = (pMB->mode & 7) | ((pMB->cbp & 3) << 3); |
301 : | edgomez | 195 | BitstreamPutBits(bs, mcbpc_inter_tab[mcbpc].code, |
302 : | mcbpc_inter_tab[mcbpc].len); | ||
303 : | Isibaar | 28 | } |
304 : | Isibaar | 3 | |
305 : | // ac prediction flag | ||
306 : | edgomez | 195 | if (pMB->acpred_directions[0]) |
307 : | edgomez | 78 | BitstreamPutBits(bs, 1, 1); |
308 : | Isibaar | 3 | else |
309 : | edgomez | 78 | BitstreamPutBits(bs, 0, 1); |
310 : | Isibaar | 3 | |
311 : | edgomez | 78 | // write cbpy |
312 : | edgomez | 195 | BitstreamPutBits(bs, cbpy_tab[cbpy].code, cbpy_tab[cbpy].len); |
313 : | Isibaar | 3 | |
314 : | // write dquant | ||
315 : | edgomez | 195 | if (pMB->mode == MODE_INTRA_Q) |
316 : | Isibaar | 3 | BitstreamPutBits(bs, pMB->dquant, 2); |
317 : | |||
318 : | h | 69 | // write interlacing |
319 : | edgomez | 195 | if (frame->global_flags & XVID_INTERLACING) { |
320 : | h | 69 | BitstreamPutBit(bs, pMB->field_dct); |
321 : | } | ||
322 : | Isibaar | 3 | // code block coeffs |
323 : | edgomez | 195 | for (i = 0; i < 6; i++) { |
324 : | if (i < 4) | ||
325 : | BitstreamPutBits(bs, dcy_tab[qcoeff[i * 64 + 0] + 255].code, | ||
326 : | dcy_tab[qcoeff[i * 64 + 0] + 255].len); | ||
327 : | Isibaar | 3 | else |
328 : | edgomez | 195 | BitstreamPutBits(bs, dcc_tab[qcoeff[i * 64 + 0] + 255].code, |
329 : | dcc_tab[qcoeff[i * 64 + 0] + 255].len); | ||
330 : | |||
331 : | if (pMB->cbp & (1 << (5 - i))) { | ||
332 : | Isibaar | 3 | bits = BitstreamPos(bs); |
333 : | |||
334 : | edgomez | 195 | CodeCoeff(bs, &qcoeff[i * 64], intra_table, |
335 : | scan_tables[pMB->acpred_directions[i]], 1); | ||
336 : | Isibaar | 3 | |
337 : | bits = BitstreamPos(bs) - bits; | ||
338 : | pStat->iTextBits += bits; | ||
339 : | } | ||
340 : | } | ||
341 : | edgomez | 78 | |
342 : | Isibaar | 3 | } |
343 : | |||
344 : | |||
345 : | edgomez | 195 | static void |
346 : | CodeBlockInter(const FRAMEINFO * frame, | ||
347 : | const MACROBLOCK * pMB, | ||
348 : | int16_t qcoeff[6 * 64], | ||
349 : | edgomez | 78 | Bitstream * bs, |
350 : | Statistics * pStat) | ||
351 : | Isibaar | 3 | { |
352 : | edgomez | 78 | |
353 : | Isibaar | 3 | int32_t i; |
354 : | uint32_t bits, mcbpc, cbpy; | ||
355 : | |||
356 : | edgomez | 78 | mcbpc = (pMB->mode & 7) | ((pMB->cbp & 3) << 3); |
357 : | Isibaar | 3 | cbpy = 15 - (pMB->cbp >> 2); |
358 : | |||
359 : | // write mcbpc | ||
360 : | edgomez | 195 | BitstreamPutBits(bs, mcbpc_inter_tab[mcbpc].code, |
361 : | mcbpc_inter_tab[mcbpc].len); | ||
362 : | Isibaar | 3 | |
363 : | // write cbpy | ||
364 : | BitstreamPutBits(bs, cbpy_tab[cbpy].code, cbpy_tab[cbpy].len); | ||
365 : | |||
366 : | // write dquant | ||
367 : | edgomez | 195 | if (pMB->mode == MODE_INTER_Q) |
368 : | Isibaar | 3 | BitstreamPutBits(bs, pMB->dquant, 2); |
369 : | edgomez | 195 | |
370 : | h | 69 | // interlacing |
371 : | edgomez | 195 | if (frame->global_flags & XVID_INTERLACING) { |
372 : | h | 69 | BitstreamPutBit(bs, pMB->field_dct); |
373 : | DEBUG1("codep: field_dct: ", pMB->field_dct); | ||
374 : | |||
375 : | // if inter block, write field ME flag | ||
376 : | edgomez | 195 | if (pMB->mode == MODE_INTER || pMB->mode == MODE_INTER_Q) { |
377 : | h | 69 | BitstreamPutBit(bs, pMB->field_pred); |
378 : | DEBUG1("codep: field_pred: ", pMB->field_pred); | ||
379 : | |||
380 : | // write field prediction references | ||
381 : | edgomez | 195 | if (pMB->field_pred) { |
382 : | h | 69 | BitstreamPutBit(bs, pMB->field_for_top); |
383 : | BitstreamPutBit(bs, pMB->field_for_bot); | ||
384 : | } | ||
385 : | } | ||
386 : | } | ||
387 : | Isibaar | 3 | // code motion vector(s) |
388 : | edgomez | 195 | for (i = 0; i < (pMB->mode == MODE_INTER4V ? 4 : 1); i++) { |
389 : | suxen_drol | 136 | CodeVector(bs, pMB->pmvs[i].x, frame->fcode, pStat); |
390 : | CodeVector(bs, pMB->pmvs[i].y, frame->fcode, pStat); | ||
391 : | Isibaar | 3 | } |
392 : | |||
393 : | bits = BitstreamPos(bs); | ||
394 : | edgomez | 195 | |
395 : | Isibaar | 3 | // code block coeffs |
396 : | edgomez | 195 | for (i = 0; i < 6; i++) |
397 : | if (pMB->cbp & (1 << (5 - i))) | ||
398 : | CodeCoeff(bs, &qcoeff[i * 64], inter_table, scan_tables[0], 0); | ||
399 : | Isibaar | 3 | |
400 : | bits = BitstreamPos(bs) - bits; | ||
401 : | pStat->iTextBits += bits; | ||
402 : | edgomez | 78 | |
403 : | Isibaar | 3 | } |
404 : | |||
405 : | |||
406 : | edgomez | 195 | void |
407 : | MBCoding(const FRAMEINFO * frame, | ||
408 : | MACROBLOCK * pMB, | ||
409 : | int16_t qcoeff[6 * 64], | ||
410 : | Bitstream * bs, | ||
411 : | Statistics * pStat) | ||
412 : | Isibaar | 3 | { |
413 : | edgomez | 78 | |
414 : | Isibaar | 3 | int intra = (pMB->mode == MODE_INTRA || pMB->mode == MODE_INTRA_Q); |
415 : | |||
416 : | edgomez | 195 | if (frame->coding_type == P_VOP) { |
417 : | if (pMB->cbp == 0 && pMB->mode == MODE_INTER && pMB->mvs[0].x == 0 && | ||
418 : | pMB->mvs[0].y == 0) { | ||
419 : | BitstreamPutBit(bs, 1); // not_coded | ||
420 : | Isibaar | 3 | return; |
421 : | edgomez | 195 | } else |
422 : | BitstreamPutBit(bs, 0); // coded | ||
423 : | Isibaar | 3 | } |
424 : | |||
425 : | edgomez | 195 | if (intra) |
426 : | suxen_drol | 136 | CodeBlockIntra(frame, pMB, qcoeff, bs, pStat); |
427 : | Isibaar | 3 | else |
428 : | suxen_drol | 136 | CodeBlockInter(frame, pMB, qcoeff, bs, pStat); |
429 : | edgomez | 78 | |
430 : | Isibaar | 3 | } |
431 : | |||
432 : | suxen_drol | 118 | /*************************************************************** |
433 : | * bframe encoding start | ||
434 : | ***************************************************************/ | ||
435 : | Isibaar | 3 | |
436 : | suxen_drol | 118 | /* |
437 : | mbtype | ||
438 : | 0 1b direct(h263) mvdb | ||
439 : | 1 01b interpolate mc+q dbquant, mvdf, mvdb | ||
440 : | 2 001b backward mc+q dbquant, mvdb | ||
441 : | 3 0001b forward mc+q dbquant, mvdf | ||
442 : | */ | ||
443 : | |||
444 : | edgomez | 195 | void |
445 : | put_bvop_mbtype(Bitstream * bs, | ||
446 : | int value) | ||
447 : | suxen_drol | 118 | { |
448 : | edgomez | 195 | switch (value) { |
449 : | case 0: | ||
450 : | BitstreamPutBit(bs, 1); | ||
451 : | return; | ||
452 : | suxen_drol | 118 | |
453 : | edgomez | 195 | case 1: |
454 : | BitstreamPutBit(bs, 0); | ||
455 : | BitstreamPutBit(bs, 1); | ||
456 : | return; | ||
457 : | suxen_drol | 118 | |
458 : | edgomez | 195 | case 2: |
459 : | BitstreamPutBit(bs, 0); | ||
460 : | BitstreamPutBit(bs, 0); | ||
461 : | BitstreamPutBit(bs, 1); | ||
462 : | return; | ||
463 : | suxen_drol | 118 | |
464 : | edgomez | 195 | case 3: |
465 : | BitstreamPutBit(bs, 0); | ||
466 : | BitstreamPutBit(bs, 0); | ||
467 : | BitstreamPutBit(bs, 0); | ||
468 : | BitstreamPutBit(bs, 1); | ||
469 : | return; | ||
470 : | |||
471 : | default:; // invalid! | ||
472 : | |||
473 : | suxen_drol | 118 | } |
474 : | edgomez | 195 | |
475 : | suxen_drol | 118 | } |
476 : | |||
477 : | /* | ||
478 : | dbquant | ||
479 : | -2 10b | ||
480 : | 0 0b | ||
481 : | +2 11b | ||
482 : | */ | ||
483 : | |||
484 : | edgomez | 195 | void |
485 : | put_bvop_dbquant(Bitstream * bs, | ||
486 : | int value) | ||
487 : | suxen_drol | 118 | { |
488 : | edgomez | 195 | switch (value) { |
489 : | case 0: | ||
490 : | BitstreamPutBit(bs, 0); | ||
491 : | return; | ||
492 : | suxen_drol | 118 | |
493 : | edgomez | 195 | case -2: |
494 : | BitstreamPutBit(bs, 1); | ||
495 : | BitstreamPutBit(bs, 0); | ||
496 : | return; | ||
497 : | suxen_drol | 118 | |
498 : | edgomez | 195 | case 2: |
499 : | BitstreamPutBit(bs, 1); | ||
500 : | BitstreamPutBit(bs, 1); | ||
501 : | return; | ||
502 : | |||
503 : | default:; // invalid | ||
504 : | suxen_drol | 118 | } |
505 : | } | ||
506 : | |||
507 : | |||
508 : | |||
509 : | edgomez | 195 | void |
510 : | MBCodingBVOP(const MACROBLOCK * mb, | ||
511 : | const int16_t qcoeff[6 * 64], | ||
512 : | const int32_t fcode, | ||
513 : | const int32_t bcode, | ||
514 : | Bitstream * bs, | ||
515 : | Statistics * pStat) | ||
516 : | suxen_drol | 118 | { |
517 : | int i; | ||
518 : | |||
519 : | /* ------------------------------------------------------------------ | ||
520 : | when a block is skipped it is decoded DIRECT(0,) | ||
521 : | hence are interpolated from forward & backward frames | ||
522 : | ------------------------------------------------------------------ */ | ||
523 : | |||
524 : | edgomez | 195 | if (mb->mode == 5) { |
525 : | BitstreamPutBit(bs, 1); // skipped | ||
526 : | suxen_drol | 118 | return; |
527 : | } | ||
528 : | |||
529 : | BitstreamPutBit(bs, 0); // not skipped | ||
530 : | |||
531 : | edgomez | 195 | if (mb->cbp == 0) { |
532 : | BitstreamPutBit(bs, 1); // cbp == 0 | ||
533 : | } else { | ||
534 : | BitstreamPutBit(bs, 0); // cbp == xxx | ||
535 : | suxen_drol | 118 | } |
536 : | |||
537 : | put_bvop_mbtype(bs, mb->mode); | ||
538 : | |||
539 : | edgomez | 195 | if (mb->cbp) { |
540 : | suxen_drol | 118 | BitstreamPutBits(bs, mb->cbp, 6); |
541 : | } | ||
542 : | |||
543 : | edgomez | 195 | if (mb->mode != MODE_DIRECT && mb->cbp != 0) { |
544 : | put_bvop_dbquant(bs, 0); // todo: mb->dquant = 0 | ||
545 : | suxen_drol | 118 | } |
546 : | |||
547 : | edgomez | 195 | if (mb->mode == MODE_INTERPOLATE || mb->mode == MODE_FORWARD) { |
548 : | CodeVector(bs, mb->pmvs[0].x, fcode, pStat); | ||
549 : | CodeVector(bs, mb->pmvs[0].y, fcode, pStat); | ||
550 : | suxen_drol | 118 | } |
551 : | |||
552 : | edgomez | 195 | if (mb->mode == MODE_INTERPOLATE || mb->mode == MODE_BACKWARD) { |
553 : | CodeVector(bs, mb->b_pmvs[0].x, bcode, pStat); | ||
554 : | CodeVector(bs, mb->b_pmvs[0].y, bcode, pStat); | ||
555 : | suxen_drol | 118 | } |
556 : | |||
557 : | edgomez | 195 | if (mb->mode == MODE_DIRECT) { |
558 : | suxen_drol | 118 | // TODO: direct |
559 : | } | ||
560 : | edgomez | 195 | |
561 : | for (i = 0; i < 6; i++) { | ||
562 : | if (mb->cbp & (1 << (5 - i))) { | ||
563 : | CodeCoeff(bs, &qcoeff[i * 64], inter_table, scan_tables[0], 0); | ||
564 : | suxen_drol | 118 | } |
565 : | edgomez | 195 | } |
566 : | suxen_drol | 118 | } |
567 : | |||
568 : | |||
569 : | |||
570 : | Isibaar | 3 | /*************************************************************** |
571 : | edgomez | 15 | * decoding stuff starts here * |
572 : | ***************************************************************/ | ||
573 : | Isibaar | 3 | |
574 : | edgomez | 195 | int |
575 : | get_mcbpc_intra(Bitstream * bs) | ||
576 : | Isibaar | 3 | { |
577 : | edgomez | 78 | |
578 : | Isibaar | 3 | uint32_t index; |
579 : | edgomez | 195 | |
580 : | while ((index = BitstreamShowBits(bs, 9)) == 1) | ||
581 : | Isibaar | 3 | BitstreamSkip(bs, 9); |
582 : | |||
583 : | index >>= 3; | ||
584 : | |||
585 : | BitstreamSkip(bs, mcbpc_intra_table[index].len); | ||
586 : | edgomez | 78 | |
587 : | Isibaar | 3 | return mcbpc_intra_table[index].code; |
588 : | edgomez | 78 | |
589 : | Isibaar | 3 | } |
590 : | |||
591 : | edgomez | 195 | int |
592 : | get_mcbpc_inter(Bitstream * bs) | ||
593 : | Isibaar | 3 | { |
594 : | edgomez | 78 | |
595 : | Isibaar | 3 | uint32_t index; |
596 : | edgomez | 195 | |
597 : | while ((index = CLIP(BitstreamShowBits(bs, 9), 256)) == 1) | ||
598 : | Isibaar | 3 | BitstreamSkip(bs, 9); |
599 : | |||
600 : | edgomez | 195 | BitstreamSkip(bs, mcbpc_inter_table[index].len); |
601 : | edgomez | 78 | |
602 : | Isibaar | 3 | return mcbpc_inter_table[index].code; |
603 : | edgomez | 78 | |
604 : | Isibaar | 3 | } |
605 : | |||
606 : | edgomez | 195 | int |
607 : | get_cbpy(Bitstream * bs, | ||
608 : | int intra) | ||
609 : | Isibaar | 3 | { |
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 : | edgomez | 195 | if (!intra) |
618 : | Isibaar | 3 | cbpy = 15 - cbpy; |
619 : | |||
620 : | return cbpy; | ||
621 : | edgomez | 78 | |
622 : | Isibaar | 3 | } |
623 : | |||
624 : | edgomez | 195 | int |
625 : | get_mv_data(Bitstream * bs) | ||
626 : | Isibaar | 3 | { |
627 : | edgomez | 78 | |
628 : | Isibaar | 3 | uint32_t index; |
629 : | |||
630 : | edgomez | 195 | if (BitstreamGetBit(bs)) |
631 : | Isibaar | 3 | return 0; |
632 : | edgomez | 195 | |
633 : | Isibaar | 3 | index = BitstreamShowBits(bs, 12); |
634 : | |||
635 : | edgomez | 195 | if (index >= 512) { |
636 : | Isibaar | 3 | index = (index >> 8) - 2; |
637 : | BitstreamSkip(bs, TMNMVtab0[index].len); | ||
638 : | return TMNMVtab0[index].code; | ||
639 : | } | ||
640 : | edgomez | 195 | |
641 : | if (index >= 128) { | ||
642 : | Isibaar | 3 | index = (index >> 2) - 32; |
643 : | BitstreamSkip(bs, TMNMVtab1[index].len); | ||
644 : | return TMNMVtab1[index].code; | ||
645 : | } | ||
646 : | |||
647 : | edgomez | 195 | index -= 4; |
648 : | Isibaar | 3 | |
649 : | BitstreamSkip(bs, TMNMVtab2[index].len); | ||
650 : | return TMNMVtab2[index].code; | ||
651 : | edgomez | 78 | |
652 : | Isibaar | 3 | } |
653 : | |||
654 : | edgomez | 195 | int |
655 : | get_mv(Bitstream * bs, | ||
656 : | int fcode) | ||
657 : | Isibaar | 3 | { |
658 : | edgomez | 78 | |
659 : | Isibaar | 3 | int data; |
660 : | int res; | ||
661 : | int mv; | ||
662 : | int scale_fac = 1 << (fcode - 1); | ||
663 : | |||
664 : | data = get_mv_data(bs); | ||
665 : | edgomez | 195 | |
666 : | if (scale_fac == 1 || data == 0) | ||
667 : | Isibaar | 3 | return data; |
668 : | |||
669 : | res = BitstreamGetBits(bs, fcode - 1); | ||
670 : | mv = ((ABS(data) - 1) * scale_fac) + res + 1; | ||
671 : | edgomez | 195 | |
672 : | Isibaar | 3 | return data < 0 ? -mv : mv; |
673 : | edgomez | 78 | |
674 : | Isibaar | 3 | } |
675 : | |||
676 : | edgomez | 195 | int |
677 : | get_dc_dif(Bitstream * bs, | ||
678 : | uint32_t dc_size) | ||
679 : | Isibaar | 3 | { |
680 : | edgomez | 78 | |
681 : | Isibaar | 3 | int code = BitstreamGetBits(bs, dc_size); |
682 : | int msb = code >> (dc_size - 1); | ||
683 : | |||
684 : | edgomez | 195 | if (msb == 0) |
685 : | return (-1 * (code ^ ((1 << dc_size) - 1))); | ||
686 : | Isibaar | 3 | |
687 : | return code; | ||
688 : | edgomez | 78 | |
689 : | Isibaar | 3 | } |
690 : | |||
691 : | edgomez | 195 | int |
692 : | get_dc_size_lum(Bitstream * bs) | ||
693 : | Isibaar | 3 | { |
694 : | edgomez | 78 | |
695 : | Isibaar | 3 | int code, i; |
696 : | edgomez | 195 | |
697 : | Isibaar | 3 | code = BitstreamShowBits(bs, 11); |
698 : | |||
699 : | edgomez | 195 | for (i = 11; i > 3; i--) { |
700 : | if (code == 1) { | ||
701 : | Isibaar | 3 | BitstreamSkip(bs, i); |
702 : | return i + 1; | ||
703 : | } | ||
704 : | code >>= 1; | ||
705 : | } | ||
706 : | |||
707 : | BitstreamSkip(bs, dc_lum_tab[code].len); | ||
708 : | return dc_lum_tab[code].code; | ||
709 : | edgomez | 78 | |
710 : | Isibaar | 3 | } |
711 : | |||
712 : | |||
713 : | edgomez | 195 | int |
714 : | get_dc_size_chrom(Bitstream * bs) | ||
715 : | Isibaar | 3 | { |
716 : | edgomez | 78 | |
717 : | Isibaar | 3 | uint32_t code, i; |
718 : | edgomez | 195 | |
719 : | Isibaar | 3 | code = BitstreamShowBits(bs, 12); |
720 : | |||
721 : | edgomez | 195 | for (i = 12; i > 2; i--) { |
722 : | if (code == 1) { | ||
723 : | Isibaar | 3 | BitstreamSkip(bs, i); |
724 : | return i; | ||
725 : | } | ||
726 : | code >>= 1; | ||
727 : | } | ||
728 : | |||
729 : | return 3 - BitstreamGetBits(bs, 2); | ||
730 : | edgomez | 78 | |
731 : | Isibaar | 3 | } |
732 : | |||
733 : | edgomez | 195 | void |
734 : | get_intra_block(Bitstream * bs, | ||
735 : | int16_t * block, | ||
736 : | int direction, | ||
737 : | int coeff) | ||
738 : | Isibaar | 3 | { |
739 : | edgomez | 78 | |
740 : | edgomez | 195 | const uint16_t *scan = scan_tables[direction]; |
741 : | Isibaar | 3 | int level; |
742 : | int run; | ||
743 : | int last; | ||
744 : | |||
745 : | edgomez | 195 | do { |
746 : | Isibaar | 3 | level = get_coeff(bs, &run, &last, 1, 0); |
747 : | edgomez | 195 | if (run == -1) { |
748 : | Isibaar | 3 | DEBUG("fatal: invalid run"); |
749 : | break; | ||
750 : | } | ||
751 : | coeff += run; | ||
752 : | edgomez | 195 | block[scan[coeff]] = level; |
753 : | if (level < -127 || level > 127) { | ||
754 : | Isibaar | 3 | DEBUG1("warning: intra_overflow", level); |
755 : | } | ||
756 : | coeff++; | ||
757 : | } while (!last); | ||
758 : | edgomez | 78 | |
759 : | Isibaar | 3 | } |
760 : | |||
761 : | edgomez | 195 | void |
762 : | get_inter_block(Bitstream * bs, | ||
763 : | int16_t * block) | ||
764 : | Isibaar | 3 | { |
765 : | edgomez | 78 | |
766 : | edgomez | 195 | const uint16_t *scan = scan_tables[0]; |
767 : | Isibaar | 3 | int p; |
768 : | int level; | ||
769 : | int run; | ||
770 : | int last; | ||
771 : | |||
772 : | p = 0; | ||
773 : | edgomez | 195 | do { |
774 : | Isibaar | 3 | level = get_coeff(bs, &run, &last, 0, 0); |
775 : | edgomez | 195 | if (run == -1) { |
776 : | Isibaar | 3 | DEBUG("fatal: invalid run"); |
777 : | break; | ||
778 : | } | ||
779 : | p += run; | ||
780 : | chenm001 | 161 | |
781 : | edgomez | 195 | block[scan[p]] = level; |
782 : | if (level < -127 || level > 127) { | ||
783 : | Isibaar | 3 | DEBUG1("warning: inter_overflow", level); |
784 : | } | ||
785 : | p++; | ||
786 : | } while (!last); | ||
787 : | edgomez | 78 | |
788 : | Isibaar | 3 | } |
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