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1 : | suxen_drol | 1.11 | /****************************************************************************** |
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 | 1.15 | * mbcoding.c * |
33 : | suxen_drol | 1.11 | * * |
34 : | Isibaar | 1.15 | * Copyright (C) 2002 - Michael Militzer <isibaar@xvid.org> * |
35 : | suxen_drol | 1.11 | * * |
36 : | * For more information visit the XviD homepage: http://www.xvid.org * | ||
37 : | * * | ||
38 : | ******************************************************************************/ | ||
39 : | |||
40 : | /****************************************************************************** | ||
41 : | * * | ||
42 : | * Revision history: * | ||
43 : | * * | ||
44 : | suxen_drol | 1.19 | * 28.06.2002 added check_resync_marker() * |
45 : | Isibaar | 1.15 | * 14.04.2002 bframe encoding * |
46 : | suxen_drol | 1.11 | * 08.03.2002 initial version; isibaar * |
47 : | * * | ||
48 : | ******************************************************************************/ | ||
49 : | |||
50 : | |||
51 : | |||
52 : | Isibaar | 1.8 | #include <stdlib.h> |
53 : | Isibaar | 1.1 | #include "../portab.h" |
54 : | #include "bitstream.h" | ||
55 : | #include "zigzag.h" | ||
56 : | #include "vlc_codes.h" | ||
57 : | Isibaar | 1.8 | #include "mbcoding.h" |
58 : | Isibaar | 1.1 | |
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 | 1.17 | VLC intra_table[524032]; |
65 : | Isibaar | 1.15 | VLC inter_table[524032]; |
66 : | Isibaar | 1.9 | |
67 : | Isibaar | 1.8 | VLC DCT3Dintra[4096]; |
68 : | VLC DCT3Dinter[4096]; | ||
69 : | Isibaar | 1.1 | |
70 : | edgomez | 1.17 | void |
71 : | init_vlc_tables(void) | ||
72 : | Isibaar | 1.1 | { |
73 : | edgomez | 1.7 | |
74 : | Isibaar | 1.1 | 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 | 1.17 | |
82 : | Isibaar | 1.8 | vlc[0] = intra_table; |
83 : | vlc[1] = inter_table; | ||
84 : | edgomez | 1.17 | |
85 : | Isibaar | 1.8 | // generate encoding vlc lookup tables |
86 : | Isibaar | 1.15 | // the lookup table idea is taken from the excellent fame project by Vivien Chapellier |
87 : | edgomez | 1.17 | for (i = 0; i < 4; i++) { |
88 : | Isibaar | 1.1 | intra = i % 2; |
89 : | Isibaar | 1.8 | last = i / 2; |
90 : | Isibaar | 1.1 | |
91 : | Isibaar | 1.8 | coeff_ptr = coeff_vlc[last + 2 * intra]; |
92 : | edgomez | 1.17 | |
93 : | for (k = -2047; k < 2048; k++) { // level | ||
94 : | Isibaar | 1.8 | int8_t *max_level_ptr = max_level[last + 2 * intra]; |
95 : | int8_t *max_run_ptr = max_run[last + 2 * intra]; | ||
96 : | edgomez | 1.17 | |
97 : | for (l = 0; l < 64; l++) { // run | ||
98 : | Isibaar | 1.5 | int32_t level = k; |
99 : | Isibaar | 1.18 | ptr_t run = l; |
100 : | edgomez | 1.17 | |
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 | 1.1 | level -= max_level_ptr[run]; |
109 : | else | ||
110 : | level += max_level_ptr[run]; | ||
111 : | Isibaar | 1.5 | |
112 : | edgomez | 1.17 | if ((abs(level) <= max_level_ptr[run]) && |
113 : | (run <= (uint32_t) max_run_ptr[abs(level)])) { | ||
114 : | |||
115 : | Isibaar | 1.8 | vlc[intra]->code = 0x06; |
116 : | vlc[intra]->len = 8; | ||
117 : | goto loop_end; | ||
118 : | } | ||
119 : | |||
120 : | edgomez | 1.17 | if (level > 0) // still here? |
121 : | level += max_level_ptr[run]; // restore level | ||
122 : | Isibaar | 1.8 | else |
123 : | level -= max_level_ptr[run]; | ||
124 : | |||
125 : | edgomez | 1.17 | run -= max_run_ptr[abs(level)] + 1; // and change run |
126 : | |||
127 : | if ((abs(level) <= max_level_ptr[run]) && | ||
128 : | (run <= (uint32_t) max_run_ptr[abs(level)])) { | ||
129 : | Isibaar | 1.8 | |
130 : | vlc[intra]->code = 0x0e; | ||
131 : | vlc[intra]->len = 9; | ||
132 : | goto loop_end; | ||
133 : | Isibaar | 1.1 | } |
134 : | Isibaar | 1.8 | run += max_run_ptr[abs(level)] + 1; |
135 : | Isibaar | 1.1 | } |
136 : | Isibaar | 1.8 | |
137 : | edgomez | 1.17 | vlc[intra]->code = |
138 : | (uint32_t) ((l << 14) | (0x1e + last) << 20) | (1 << 13) | | ||
139 : | ((k & 0xfff) << 1) | 1; | ||
140 : | Isibaar | 1.8 | |
141 : | vlc[intra]->len = 30; | ||
142 : | vlc[intra]++; | ||
143 : | continue; | ||
144 : | |||
145 : | edgomez | 1.17 | 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 | 1.8 | |
156 : | edgomez | 1.17 | if (level < 0) |
157 : | Isibaar | 1.8 | vlc[intra]->code += 1; |
158 : | } | ||
159 : | |||
160 : | Isibaar | 1.1 | vlc[intra]++; |
161 : | } | ||
162 : | } | ||
163 : | } | ||
164 : | edgomez | 1.7 | |
165 : | edgomez | 1.17 | for (i = 0; i < 4096; i++) { |
166 : | if (i >= 512) { | ||
167 : | Isibaar | 1.1 | *vlc1 = DCT3Dtab3[(i >> 5) - 16]; |
168 : | *vlc2 = DCT3Dtab0[(i >> 5) - 16]; | ||
169 : | edgomez | 1.17 | } else if (i >= 128) { |
170 : | Isibaar | 1.1 | *vlc1 = DCT3Dtab4[(i >> 2) - 32]; |
171 : | *vlc2 = DCT3Dtab1[(i >> 2) - 32]; | ||
172 : | edgomez | 1.17 | } else if (i >= 8) { |
173 : | Isibaar | 1.1 | *vlc1 = DCT3Dtab5[i - 8]; |
174 : | *vlc2 = DCT3Dtab2[i - 8]; | ||
175 : | edgomez | 1.17 | } else { |
176 : | Isibaar | 1.1 | *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 | 1.17 | static __inline void |
189 : | CodeVector(Bitstream * bs, | ||
190 : | int32_t value, | ||
191 : | int32_t f_code, | ||
192 : | Statistics * pStat) | ||
193 : | Isibaar | 1.1 | { |
194 : | edgomez | 1.7 | |
195 : | Isibaar | 1.1 | const int scale_factor = 1 << (f_code - 1); |
196 : | const int cmp = scale_factor << 5; | ||
197 : | |||
198 : | edgomez | 1.17 | if (value < (-1 * cmp)) |
199 : | Isibaar | 1.1 | value += 64 * scale_factor; |
200 : | edgomez | 1.17 | |
201 : | if (value > (cmp - 1)) | ||
202 : | Isibaar | 1.1 | value -= 64 * scale_factor; |
203 : | |||
204 : | edgomez | 1.7 | pStat->iMvSum += value * value; |
205 : | pStat->iMvCount++; | ||
206 : | Isibaar | 1.1 | |
207 : | edgomez | 1.7 | if (value == 0) { |
208 : | edgomez | 1.17 | BitstreamPutBits(bs, mb_motion_table[32].code, |
209 : | mb_motion_table[32].len); | ||
210 : | edgomez | 1.7 | } else { |
211 : | Isibaar | 1.1 | uint16_t length, code, mv_res, sign; |
212 : | edgomez | 1.17 | |
213 : | Isibaar | 1.1 | length = 16 << f_code; |
214 : | f_code--; | ||
215 : | edgomez | 1.17 | |
216 : | Isibaar | 1.1 | sign = (value < 0); |
217 : | |||
218 : | edgomez | 1.17 | if (value >= length) |
219 : | Isibaar | 1.1 | value -= 2 * length; |
220 : | edgomez | 1.17 | else if (value < -length) |
221 : | Isibaar | 1.1 | value += 2 * length; |
222 : | |||
223 : | edgomez | 1.17 | if (sign) |
224 : | Isibaar | 1.1 | value = -value; |
225 : | |||
226 : | value--; | ||
227 : | mv_res = value & ((1 << f_code) - 1); | ||
228 : | code = ((value - mv_res) >> f_code) + 1; | ||
229 : | |||
230 : | edgomez | 1.17 | if (sign) |
231 : | Isibaar | 1.1 | code = -code; |
232 : | |||
233 : | code += 32; | ||
234 : | edgomez | 1.17 | BitstreamPutBits(bs, mb_motion_table[code].code, |
235 : | mb_motion_table[code].len); | ||
236 : | |||
237 : | if (f_code) | ||
238 : | Isibaar | 1.1 | BitstreamPutBits(bs, mv_res, f_code); |
239 : | edgomez | 1.7 | } |
240 : | |||
241 : | Isibaar | 1.1 | } |
242 : | |||
243 : | |||
244 : | edgomez | 1.17 | 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 | 1.7 | { |
251 : | |||
252 : | Isibaar | 1.1 | uint32_t j, last; |
253 : | short v; | ||
254 : | VLC *vlc; | ||
255 : | edgomez | 1.17 | |
256 : | Isibaar | 1.1 | j = intra; |
257 : | Isibaar | 1.10 | last = intra; |
258 : | Isibaar | 1.1 | |
259 : | edgomez | 1.17 | while (j < 64 && (v = qcoeff[zigzag[j]]) == 0) |
260 : | j++; | ||
261 : | |||
262 : | Isibaar | 1.1 | do { |
263 : | Isibaar | 1.15 | vlc = table + 64 * 2047 + (v << 6) + j - last; |
264 : | last = ++j; | ||
265 : | |||
266 : | Isibaar | 1.1 | // count zeroes |
267 : | edgomez | 1.17 | while (j < 64 && (v = qcoeff[zigzag[j]]) == 0) |
268 : | j++; | ||
269 : | |||
270 : | Isibaar | 1.1 | // write code |
271 : | edgomez | 1.17 | if (j != 64) { |
272 : | Isibaar | 1.1 | BitstreamPutBits(bs, vlc->code, vlc->len); |
273 : | } else { | ||
274 : | Isibaar | 1.15 | vlc += 64 * 4095; |
275 : | Isibaar | 1.1 | BitstreamPutBits(bs, vlc->code, vlc->len); |
276 : | break; | ||
277 : | } | ||
278 : | edgomez | 1.17 | } while (1); |
279 : | edgomez | 1.7 | |
280 : | Isibaar | 1.1 | } |
281 : | |||
282 : | |||
283 : | edgomez | 1.17 | static void |
284 : | CodeBlockIntra(const FRAMEINFO * frame, | ||
285 : | const MACROBLOCK * pMB, | ||
286 : | int16_t qcoeff[6 * 64], | ||
287 : | edgomez | 1.7 | Bitstream * bs, |
288 : | Statistics * pStat) | ||
289 : | Isibaar | 1.1 | { |
290 : | edgomez | 1.7 | |
291 : | Isibaar | 1.1 | uint32_t i, mcbpc, cbpy, bits; |
292 : | |||
293 : | cbpy = pMB->cbp >> 2; | ||
294 : | |||
295 : | edgomez | 1.7 | // write mcbpc |
296 : | edgomez | 1.17 | if (frame->coding_type == I_VOP) { |
297 : | edgomez | 1.7 | mcbpc = ((pMB->mode >> 1) & 3) | ((pMB->cbp & 3) << 2); |
298 : | edgomez | 1.17 | BitstreamPutBits(bs, mcbpc_intra_tab[mcbpc].code, |
299 : | mcbpc_intra_tab[mcbpc].len); | ||
300 : | } else { | ||
301 : | edgomez | 1.7 | mcbpc = (pMB->mode & 7) | ((pMB->cbp & 3) << 3); |
302 : | edgomez | 1.17 | BitstreamPutBits(bs, mcbpc_inter_tab[mcbpc].code, |
303 : | mcbpc_inter_tab[mcbpc].len); | ||
304 : | Isibaar | 1.4 | } |
305 : | Isibaar | 1.1 | |
306 : | // ac prediction flag | ||
307 : | edgomez | 1.17 | if (pMB->acpred_directions[0]) |
308 : | edgomez | 1.7 | BitstreamPutBits(bs, 1, 1); |
309 : | Isibaar | 1.1 | else |
310 : | edgomez | 1.7 | BitstreamPutBits(bs, 0, 1); |
311 : | Isibaar | 1.1 | |
312 : | edgomez | 1.7 | // write cbpy |
313 : | edgomez | 1.17 | BitstreamPutBits(bs, cbpy_tab[cbpy].code, cbpy_tab[cbpy].len); |
314 : | Isibaar | 1.1 | |
315 : | // write dquant | ||
316 : | edgomez | 1.17 | if (pMB->mode == MODE_INTRA_Q) |
317 : | Isibaar | 1.1 | BitstreamPutBits(bs, pMB->dquant, 2); |
318 : | |||
319 : | h | 1.6 | // write interlacing |
320 : | edgomez | 1.17 | if (frame->global_flags & XVID_INTERLACING) { |
321 : | h | 1.6 | BitstreamPutBit(bs, pMB->field_dct); |
322 : | } | ||
323 : | Isibaar | 1.1 | // code block coeffs |
324 : | edgomez | 1.17 | 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 | 1.1 | else |
329 : | edgomez | 1.17 | 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 | 1.1 | bits = BitstreamPos(bs); |
334 : | |||
335 : | edgomez | 1.17 | CodeCoeff(bs, &qcoeff[i * 64], intra_table, |
336 : | scan_tables[pMB->acpred_directions[i]], 1); | ||
337 : | Isibaar | 1.1 | |
338 : | bits = BitstreamPos(bs) - bits; | ||
339 : | pStat->iTextBits += bits; | ||
340 : | } | ||
341 : | } | ||
342 : | edgomez | 1.7 | |
343 : | Isibaar | 1.1 | } |
344 : | |||
345 : | |||
346 : | edgomez | 1.17 | static void |
347 : | CodeBlockInter(const FRAMEINFO * frame, | ||
348 : | const MACROBLOCK * pMB, | ||
349 : | int16_t qcoeff[6 * 64], | ||
350 : | edgomez | 1.7 | Bitstream * bs, |
351 : | Statistics * pStat) | ||
352 : | Isibaar | 1.1 | { |
353 : | edgomez | 1.7 | |
354 : | Isibaar | 1.1 | int32_t i; |
355 : | uint32_t bits, mcbpc, cbpy; | ||
356 : | |||
357 : | edgomez | 1.7 | mcbpc = (pMB->mode & 7) | ((pMB->cbp & 3) << 3); |
358 : | Isibaar | 1.1 | cbpy = 15 - (pMB->cbp >> 2); |
359 : | |||
360 : | // write mcbpc | ||
361 : | edgomez | 1.17 | BitstreamPutBits(bs, mcbpc_inter_tab[mcbpc].code, |
362 : | mcbpc_inter_tab[mcbpc].len); | ||
363 : | Isibaar | 1.1 | |
364 : | // write cbpy | ||
365 : | BitstreamPutBits(bs, cbpy_tab[cbpy].code, cbpy_tab[cbpy].len); | ||
366 : | |||
367 : | // write dquant | ||
368 : | edgomez | 1.17 | if (pMB->mode == MODE_INTER_Q) |
369 : | Isibaar | 1.1 | BitstreamPutBits(bs, pMB->dquant, 2); |
370 : | edgomez | 1.17 | |
371 : | h | 1.6 | // interlacing |
372 : | edgomez | 1.17 | if (frame->global_flags & XVID_INTERLACING) { |
373 : | h | 1.6 | BitstreamPutBit(bs, pMB->field_dct); |
374 : | DEBUG1("codep: field_dct: ", pMB->field_dct); | ||
375 : | |||
376 : | // if inter block, write field ME flag | ||
377 : | edgomez | 1.17 | if (pMB->mode == MODE_INTER || pMB->mode == MODE_INTER_Q) { |
378 : | h | 1.6 | BitstreamPutBit(bs, pMB->field_pred); |
379 : | DEBUG1("codep: field_pred: ", pMB->field_pred); | ||
380 : | |||
381 : | // write field prediction references | ||
382 : | edgomez | 1.17 | if (pMB->field_pred) { |
383 : | h | 1.6 | BitstreamPutBit(bs, pMB->field_for_top); |
384 : | BitstreamPutBit(bs, pMB->field_for_bot); | ||
385 : | } | ||
386 : | } | ||
387 : | } | ||
388 : | Isibaar | 1.1 | // code motion vector(s) |
389 : | edgomez | 1.17 | for (i = 0; i < (pMB->mode == MODE_INTER4V ? 4 : 1); i++) { |
390 : | suxen_drol | 1.13 | CodeVector(bs, pMB->pmvs[i].x, frame->fcode, pStat); |
391 : | CodeVector(bs, pMB->pmvs[i].y, frame->fcode, pStat); | ||
392 : | Isibaar | 1.1 | } |
393 : | |||
394 : | bits = BitstreamPos(bs); | ||
395 : | edgomez | 1.17 | |
396 : | Isibaar | 1.1 | // code block coeffs |
397 : | edgomez | 1.17 | 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 | 1.1 | |
401 : | bits = BitstreamPos(bs) - bits; | ||
402 : | pStat->iTextBits += bits; | ||
403 : | edgomez | 1.7 | |
404 : | Isibaar | 1.1 | } |
405 : | |||
406 : | |||
407 : | edgomez | 1.17 | void |
408 : | MBCoding(const FRAMEINFO * frame, | ||
409 : | MACROBLOCK * pMB, | ||
410 : | int16_t qcoeff[6 * 64], | ||
411 : | Bitstream * bs, | ||
412 : | Statistics * pStat) | ||
413 : | Isibaar | 1.1 | { |
414 : | edgomez | 1.7 | |
415 : | Isibaar | 1.1 | int intra = (pMB->mode == MODE_INTRA || pMB->mode == MODE_INTRA_Q); |
416 : | |||
417 : | edgomez | 1.17 | if (frame->coding_type == P_VOP) { |
418 : | if (pMB->cbp == 0 && pMB->mode == MODE_INTER && pMB->mvs[0].x == 0 && | ||
419 : | pMB->mvs[0].y == 0) { | ||
420 : | BitstreamPutBit(bs, 1); // not_coded | ||
421 : | Isibaar | 1.1 | return; |
422 : | edgomez | 1.17 | } else |
423 : | BitstreamPutBit(bs, 0); // coded | ||
424 : | Isibaar | 1.1 | } |
425 : | |||
426 : | edgomez | 1.17 | if (intra) |
427 : | suxen_drol | 1.13 | CodeBlockIntra(frame, pMB, qcoeff, bs, pStat); |
428 : | Isibaar | 1.1 | else |
429 : | suxen_drol | 1.13 | CodeBlockInter(frame, pMB, qcoeff, bs, pStat); |
430 : | edgomez | 1.7 | |
431 : | Isibaar | 1.1 | } |
432 : | suxen_drol | 1.11 | |
433 : | /*************************************************************** | ||
434 : | * bframe encoding start | ||
435 : | ***************************************************************/ | ||
436 : | |||
437 : | /* | ||
438 : | mbtype | ||
439 : | 0 1b direct(h263) mvdb | ||
440 : | 1 01b interpolate mc+q dbquant, mvdf, mvdb | ||
441 : | 2 001b backward mc+q dbquant, mvdb | ||
442 : | 3 0001b forward mc+q dbquant, mvdf | ||
443 : | */ | ||
444 : | |||
445 : | edgomez | 1.17 | void |
446 : | put_bvop_mbtype(Bitstream * bs, | ||
447 : | int value) | ||
448 : | { | ||
449 : | switch (value) { | ||
450 : | case 0: | ||
451 : | BitstreamPutBit(bs, 1); | ||
452 : | return; | ||
453 : | |||
454 : | case 1: | ||
455 : | BitstreamPutBit(bs, 0); | ||
456 : | BitstreamPutBit(bs, 1); | ||
457 : | return; | ||
458 : | |||
459 : | case 2: | ||
460 : | BitstreamPutBit(bs, 0); | ||
461 : | BitstreamPutBit(bs, 0); | ||
462 : | BitstreamPutBit(bs, 1); | ||
463 : | return; | ||
464 : | |||
465 : | case 3: | ||
466 : | BitstreamPutBit(bs, 0); | ||
467 : | BitstreamPutBit(bs, 0); | ||
468 : | BitstreamPutBit(bs, 0); | ||
469 : | BitstreamPutBit(bs, 1); | ||
470 : | return; | ||
471 : | suxen_drol | 1.11 | |
472 : | edgomez | 1.17 | default:; // invalid! |
473 : | suxen_drol | 1.11 | |
474 : | } | ||
475 : | edgomez | 1.17 | |
476 : | suxen_drol | 1.11 | } |
477 : | |||
478 : | /* | ||
479 : | dbquant | ||
480 : | -2 10b | ||
481 : | 0 0b | ||
482 : | +2 11b | ||
483 : | */ | ||
484 : | |||
485 : | edgomez | 1.17 | void |
486 : | put_bvop_dbquant(Bitstream * bs, | ||
487 : | int value) | ||
488 : | { | ||
489 : | switch (value) { | ||
490 : | case 0: | ||
491 : | BitstreamPutBit(bs, 0); | ||
492 : | return; | ||
493 : | |||
494 : | case -2: | ||
495 : | BitstreamPutBit(bs, 1); | ||
496 : | BitstreamPutBit(bs, 0); | ||
497 : | return; | ||
498 : | suxen_drol | 1.11 | |
499 : | edgomez | 1.17 | case 2: |
500 : | BitstreamPutBit(bs, 1); | ||
501 : | BitstreamPutBit(bs, 1); | ||
502 : | return; | ||
503 : | suxen_drol | 1.11 | |
504 : | edgomez | 1.17 | default:; // invalid |
505 : | suxen_drol | 1.11 | } |
506 : | } | ||
507 : | |||
508 : | |||
509 : | |||
510 : | edgomez | 1.17 | void |
511 : | MBCodingBVOP(const MACROBLOCK * mb, | ||
512 : | const int16_t qcoeff[6 * 64], | ||
513 : | const int32_t fcode, | ||
514 : | const int32_t bcode, | ||
515 : | Bitstream * bs, | ||
516 : | Statistics * pStat) | ||
517 : | suxen_drol | 1.11 | { |
518 : | int i; | ||
519 : | |||
520 : | /* ------------------------------------------------------------------ | ||
521 : | when a block is skipped it is decoded DIRECT(0,) | ||
522 : | hence are interpolated from forward & backward frames | ||
523 : | ------------------------------------------------------------------ */ | ||
524 : | |||
525 : | edgomez | 1.17 | if (mb->mode == 5) { |
526 : | BitstreamPutBit(bs, 1); // skipped | ||
527 : | suxen_drol | 1.11 | return; |
528 : | } | ||
529 : | |||
530 : | BitstreamPutBit(bs, 0); // not skipped | ||
531 : | |||
532 : | edgomez | 1.17 | if (mb->cbp == 0) { |
533 : | BitstreamPutBit(bs, 1); // cbp == 0 | ||
534 : | } else { | ||
535 : | BitstreamPutBit(bs, 0); // cbp == xxx | ||
536 : | suxen_drol | 1.11 | } |
537 : | |||
538 : | put_bvop_mbtype(bs, mb->mode); | ||
539 : | |||
540 : | edgomez | 1.17 | if (mb->cbp) { |
541 : | suxen_drol | 1.11 | BitstreamPutBits(bs, mb->cbp, 6); |
542 : | } | ||
543 : | |||
544 : | edgomez | 1.17 | if (mb->mode != MODE_DIRECT && mb->cbp != 0) { |
545 : | put_bvop_dbquant(bs, 0); // todo: mb->dquant = 0 | ||
546 : | suxen_drol | 1.11 | } |
547 : | |||
548 : | edgomez | 1.17 | if (mb->mode == MODE_INTERPOLATE || mb->mode == MODE_FORWARD) { |
549 : | CodeVector(bs, mb->pmvs[0].x, fcode, pStat); | ||
550 : | CodeVector(bs, mb->pmvs[0].y, fcode, pStat); | ||
551 : | suxen_drol | 1.11 | } |
552 : | |||
553 : | edgomez | 1.17 | if (mb->mode == MODE_INTERPOLATE || mb->mode == MODE_BACKWARD) { |
554 : | CodeVector(bs, mb->b_pmvs[0].x, bcode, pStat); | ||
555 : | CodeVector(bs, mb->b_pmvs[0].y, bcode, pStat); | ||
556 : | suxen_drol | 1.11 | } |
557 : | |||
558 : | edgomez | 1.17 | if (mb->mode == MODE_DIRECT) { |
559 : | suxen_drol | 1.11 | // TODO: direct |
560 : | } | ||
561 : | edgomez | 1.17 | |
562 : | for (i = 0; i < 6; i++) { | ||
563 : | if (mb->cbp & (1 << (5 - i))) { | ||
564 : | CodeCoeff(bs, &qcoeff[i * 64], inter_table, scan_tables[0], 0); | ||
565 : | suxen_drol | 1.11 | } |
566 : | edgomez | 1.17 | } |
567 : | suxen_drol | 1.11 | } |
568 : | |||
569 : | Isibaar | 1.1 | |
570 : | |||
571 : | /*************************************************************** | ||
572 : | edgomez | 1.2 | * decoding stuff starts here * |
573 : | ***************************************************************/ | ||
574 : | Isibaar | 1.1 | |
575 : | suxen_drol | 1.19 | |
576 : | void | ||
577 : | skip_stuffing(Bitstream *bs) | ||
578 : | { | ||
579 : | while (BitstreamShowBits(bs, 9) == 1) | ||
580 : | BitstreamSkip(bs, 9); | ||
581 : | } | ||
582 : | |||
583 : | |||
584 : | |||
585 : | // for IVOP addbits == 0 | ||
586 : | // for PVOP addbits == fcode - 1 | ||
587 : | // for BVOP addbits == max(fcode,bcode) - 1 | ||
588 : | // returns true or false | ||
589 : | int | ||
590 : | check_resync_marker(Bitstream * bs, int addbits) | ||
591 : | { | ||
592 : | uint32_t nbits; | ||
593 : | uint32_t code; | ||
594 : | uint32_t nbitsresyncmarker = NUMBITS_VP_RESYNC_MARKER + addbits; | ||
595 : | |||
596 : | nbits = BitstreamNumBitsToByteAlign(bs); | ||
597 : | code = BitstreamShowBits(bs, nbits); | ||
598 : | |||
599 : | if (code == (((uint32_t)1 << (nbits - 1)) - 1)) | ||
600 : | { | ||
601 : | return BitstreamShowBitsFromByteAlign(bs, nbitsresyncmarker) == RESYNC_MARKER; | ||
602 : | } | ||
603 : | |||
604 : | return 0; | ||
605 : | } | ||
606 : | |||
607 : | |||
608 : | |||
609 : | edgomez | 1.17 | int |
610 : | get_mcbpc_intra(Bitstream * bs) | ||
611 : | Isibaar | 1.1 | { |
612 : | edgomez | 1.7 | |
613 : | Isibaar | 1.1 | uint32_t index; |
614 : | edgomez | 1.17 | |
615 : | suxen_drol | 1.19 | index = BitstreamShowBits(bs, 9); |
616 : | Isibaar | 1.1 | index >>= 3; |
617 : | |||
618 : | BitstreamSkip(bs, mcbpc_intra_table[index].len); | ||
619 : | edgomez | 1.7 | |
620 : | Isibaar | 1.1 | return mcbpc_intra_table[index].code; |
621 : | edgomez | 1.7 | |
622 : | Isibaar | 1.1 | } |
623 : | |||
624 : | edgomez | 1.17 | int |
625 : | get_mcbpc_inter(Bitstream * bs) | ||
626 : | Isibaar | 1.1 | { |
627 : | edgomez | 1.7 | |
628 : | Isibaar | 1.1 | uint32_t index; |
629 : | suxen_drol | 1.19 | |
630 : | index = CLIP(BitstreamShowBits(bs, 9), 256); | ||
631 : | Isibaar | 1.1 | |
632 : | edgomez | 1.17 | BitstreamSkip(bs, mcbpc_inter_table[index].len); |
633 : | edgomez | 1.7 | |
634 : | Isibaar | 1.1 | return mcbpc_inter_table[index].code; |
635 : | edgomez | 1.7 | |
636 : | Isibaar | 1.1 | } |
637 : | |||
638 : | edgomez | 1.17 | int |
639 : | get_cbpy(Bitstream * bs, | ||
640 : | int intra) | ||
641 : | Isibaar | 1.1 | { |
642 : | edgomez | 1.7 | |
643 : | Isibaar | 1.1 | int cbpy; |
644 : | uint32_t index = BitstreamShowBits(bs, 6); | ||
645 : | |||
646 : | BitstreamSkip(bs, cbpy_table[index].len); | ||
647 : | cbpy = cbpy_table[index].code; | ||
648 : | |||
649 : | edgomez | 1.17 | if (!intra) |
650 : | Isibaar | 1.1 | cbpy = 15 - cbpy; |
651 : | |||
652 : | return cbpy; | ||
653 : | edgomez | 1.7 | |
654 : | Isibaar | 1.1 | } |
655 : | |||
656 : | edgomez | 1.17 | int |
657 : | get_mv_data(Bitstream * bs) | ||
658 : | Isibaar | 1.1 | { |
659 : | edgomez | 1.7 | |
660 : | Isibaar | 1.1 | uint32_t index; |
661 : | |||
662 : | edgomez | 1.17 | if (BitstreamGetBit(bs)) |
663 : | Isibaar | 1.1 | return 0; |
664 : | edgomez | 1.17 | |
665 : | Isibaar | 1.1 | index = BitstreamShowBits(bs, 12); |
666 : | |||
667 : | edgomez | 1.17 | if (index >= 512) { |
668 : | Isibaar | 1.1 | index = (index >> 8) - 2; |
669 : | BitstreamSkip(bs, TMNMVtab0[index].len); | ||
670 : | return TMNMVtab0[index].code; | ||
671 : | } | ||
672 : | edgomez | 1.17 | |
673 : | if (index >= 128) { | ||
674 : | Isibaar | 1.1 | index = (index >> 2) - 32; |
675 : | BitstreamSkip(bs, TMNMVtab1[index].len); | ||
676 : | return TMNMVtab1[index].code; | ||
677 : | } | ||
678 : | |||
679 : | edgomez | 1.17 | index -= 4; |
680 : | Isibaar | 1.1 | |
681 : | BitstreamSkip(bs, TMNMVtab2[index].len); | ||
682 : | return TMNMVtab2[index].code; | ||
683 : | edgomez | 1.7 | |
684 : | Isibaar | 1.1 | } |
685 : | |||
686 : | edgomez | 1.17 | int |
687 : | get_mv(Bitstream * bs, | ||
688 : | int fcode) | ||
689 : | Isibaar | 1.1 | { |
690 : | edgomez | 1.7 | |
691 : | Isibaar | 1.1 | int data; |
692 : | int res; | ||
693 : | int mv; | ||
694 : | int scale_fac = 1 << (fcode - 1); | ||
695 : | |||
696 : | data = get_mv_data(bs); | ||
697 : | edgomez | 1.17 | |
698 : | if (scale_fac == 1 || data == 0) | ||
699 : | Isibaar | 1.1 | return data; |
700 : | |||
701 : | res = BitstreamGetBits(bs, fcode - 1); | ||
702 : | mv = ((ABS(data) - 1) * scale_fac) + res + 1; | ||
703 : | edgomez | 1.17 | |
704 : | Isibaar | 1.1 | return data < 0 ? -mv : mv; |
705 : | edgomez | 1.7 | |
706 : | Isibaar | 1.1 | } |
707 : | |||
708 : | edgomez | 1.17 | int |
709 : | get_dc_dif(Bitstream * bs, | ||
710 : | uint32_t dc_size) | ||
711 : | Isibaar | 1.1 | { |
712 : | edgomez | 1.7 | |
713 : | Isibaar | 1.1 | int code = BitstreamGetBits(bs, dc_size); |
714 : | int msb = code >> (dc_size - 1); | ||
715 : | |||
716 : | edgomez | 1.17 | if (msb == 0) |
717 : | return (-1 * (code ^ ((1 << dc_size) - 1))); | ||
718 : | Isibaar | 1.1 | |
719 : | return code; | ||
720 : | edgomez | 1.7 | |
721 : | Isibaar | 1.1 | } |
722 : | |||
723 : | edgomez | 1.17 | int |
724 : | get_dc_size_lum(Bitstream * bs) | ||
725 : | Isibaar | 1.1 | { |
726 : | edgomez | 1.7 | |
727 : | Isibaar | 1.1 | int code, i; |
728 : | edgomez | 1.17 | |
729 : | Isibaar | 1.1 | code = BitstreamShowBits(bs, 11); |
730 : | |||
731 : | edgomez | 1.17 | for (i = 11; i > 3; i--) { |
732 : | if (code == 1) { | ||
733 : | Isibaar | 1.1 | BitstreamSkip(bs, i); |
734 : | return i + 1; | ||
735 : | } | ||
736 : | code >>= 1; | ||
737 : | } | ||
738 : | |||
739 : | BitstreamSkip(bs, dc_lum_tab[code].len); | ||
740 : | return dc_lum_tab[code].code; | ||
741 : | edgomez | 1.7 | |
742 : | Isibaar | 1.1 | } |
743 : | |||
744 : | |||
745 : | edgomez | 1.17 | int |
746 : | get_dc_size_chrom(Bitstream * bs) | ||
747 : | Isibaar | 1.1 | { |
748 : | edgomez | 1.7 | |
749 : | Isibaar | 1.1 | uint32_t code, i; |
750 : | edgomez | 1.17 | |
751 : | Isibaar | 1.1 | code = BitstreamShowBits(bs, 12); |
752 : | |||
753 : | edgomez | 1.17 | for (i = 12; i > 2; i--) { |
754 : | if (code == 1) { | ||
755 : | Isibaar | 1.1 | BitstreamSkip(bs, i); |
756 : | return i; | ||
757 : | } | ||
758 : | code >>= 1; | ||
759 : | } | ||
760 : | |||
761 : | return 3 - BitstreamGetBits(bs, 2); | ||
762 : | edgomez | 1.7 | |
763 : | Isibaar | 1.1 | } |
764 : | |||
765 : | edgomez | 1.17 | void |
766 : | get_intra_block(Bitstream * bs, | ||
767 : | int16_t * block, | ||
768 : | int direction, | ||
769 : | int coeff) | ||
770 : | Isibaar | 1.1 | { |
771 : | edgomez | 1.7 | |
772 : | edgomez | 1.17 | const uint16_t *scan = scan_tables[direction]; |
773 : | Isibaar | 1.1 | int level; |
774 : | int run; | ||
775 : | int last; | ||
776 : | |||
777 : | edgomez | 1.17 | do { |
778 : | Isibaar | 1.1 | level = get_coeff(bs, &run, &last, 1, 0); |
779 : | edgomez | 1.17 | if (run == -1) { |
780 : | Isibaar | 1.1 | DEBUG("fatal: invalid run"); |
781 : | break; | ||
782 : | } | ||
783 : | coeff += run; | ||
784 : | edgomez | 1.17 | block[scan[coeff]] = level; |
785 : | if (level < -127 || level > 127) { | ||
786 : | Isibaar | 1.1 | DEBUG1("warning: intra_overflow", level); |
787 : | } | ||
788 : | coeff++; | ||
789 : | } while (!last); | ||
790 : | edgomez | 1.7 | |
791 : | Isibaar | 1.1 | } |
792 : | |||
793 : | edgomez | 1.17 | void |
794 : | get_inter_block(Bitstream * bs, | ||
795 : | int16_t * block) | ||
796 : | Isibaar | 1.1 | { |
797 : | edgomez | 1.7 | |
798 : | edgomez | 1.17 | const uint16_t *scan = scan_tables[0]; |
799 : | Isibaar | 1.1 | int p; |
800 : | int level; | ||
801 : | int run; | ||
802 : | int last; | ||
803 : | |||
804 : | p = 0; | ||
805 : | edgomez | 1.17 | do { |
806 : | Isibaar | 1.1 | level = get_coeff(bs, &run, &last, 0, 0); |
807 : | edgomez | 1.17 | if (run == -1) { |
808 : | Isibaar | 1.1 | DEBUG("fatal: invalid run"); |
809 : | break; | ||
810 : | } | ||
811 : | p += run; | ||
812 : | chenm001 | 1.16 | |
813 : | edgomez | 1.17 | block[scan[p]] = level; |
814 : | if (level < -127 || level > 127) { | ||
815 : | Isibaar | 1.1 | DEBUG1("warning: inter_overflow", level); |
816 : | } | ||
817 : | p++; | ||
818 : | } while (!last); | ||
819 : | edgomez | 1.7 | |
820 : | Isibaar | 1.1 | } |
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