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Revision 1.42 - (view) (download)
1 : | edgomez | 1.42 | /****************************************************************************** |
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 : | * mbcoding.c * | ||
33 : | * * | ||
34 : | * Copyright (C) 2002 - Michael Militzer <isibaar@xvid.org> * | ||
35 : | * * | ||
36 : | * For more information visit the XviD homepage: http://www.xvid.org * | ||
37 : | * * | ||
38 : | ******************************************************************************/ | ||
39 : | |||
40 : | /****************************************************************************** | ||
41 : | * * | ||
42 : | * Revision history: * | ||
43 : | * * | ||
44 : | * 28.10.2002 GMC support - gruel * | ||
45 : | * 28.06.2002 added check_resync_marker() * | ||
46 : | * 14.04.2002 bframe encoding * | ||
47 : | * 08.03.2002 initial version; isibaar * | ||
48 : | * * | ||
49 : | ******************************************************************************/ | ||
50 : | suxen_drol | 1.11 | |
51 : | edgomez | 1.42 | |
52 : | #include <stdio.h> | ||
53 : | Isibaar | 1.8 | #include <stdlib.h> |
54 : | Isibaar | 1.1 | #include "../portab.h" |
55 : | edgomez | 1.42 | #include "../global.h" |
56 : | Isibaar | 1.1 | #include "bitstream.h" |
57 : | #include "zigzag.h" | ||
58 : | #include "vlc_codes.h" | ||
59 : | Isibaar | 1.8 | #include "mbcoding.h" |
60 : | Isibaar | 1.1 | |
61 : | #include "../utils/mbfunctions.h" | ||
62 : | |||
63 : | edgomez | 1.38 | /* #define BIGLUT */ |
64 : | edgomez | 1.37 | |
65 : | edgomez | 1.38 | #ifdef BIGLUT |
66 : | edgomez | 1.37 | #define LEVELOFFSET 2048 |
67 : | #else | ||
68 : | #define LEVELOFFSET 32 | ||
69 : | #endif | ||
70 : | |||
71 : | static REVERSE_EVENT DCT3D[2][4096]; | ||
72 : | edgomez | 1.26 | |
73 : | edgomez | 1.38 | #ifdef BIGLUT |
74 : | edgomez | 1.37 | static VLC coeff_VLC[2][2][4096][64]; |
75 : | edgomez | 1.42 | VLC *intra_table; |
76 : | static VLC *inter_table; | ||
77 : | edgomez | 1.37 | #else |
78 : | static VLC coeff_VLC[2][2][64][64]; | ||
79 : | #endif | ||
80 : | edgomez | 1.26 | |
81 : | edgomez | 1.42 | /* not really MB related, but VLCs are only available here */ |
82 : | void bs_put_spritetrajectory(Bitstream * bs, const int val) | ||
83 : | { | ||
84 : | const int code = sprite_trajectory_code[val+16384].code; | ||
85 : | const int len = sprite_trajectory_code[val+16384].len; | ||
86 : | const int code2 = sprite_trajectory_len[len].code; | ||
87 : | const int len2 = sprite_trajectory_len[len].len; | ||
88 : | |||
89 : | // printf("GMC=%d Code/Len = %d / %d ",val, code,len); | ||
90 : | // printf("Code2 / Len2 = %d / %d \n",code2,len2); | ||
91 : | |||
92 : | BitstreamPutBits(bs, code2, len2); | ||
93 : | if (len) BitstreamPutBits(bs, code, len); | ||
94 : | } | ||
95 : | |||
96 : | int bs_get_spritetrajectory(Bitstream * bs) | ||
97 : | { | ||
98 : | int i; | ||
99 : | for (i = 0; i < 12; i++) | ||
100 : | { | ||
101 : | if (BitstreamShowBits(bs, sprite_trajectory_len[i].len) == sprite_trajectory_len[i].code) | ||
102 : | { | ||
103 : | BitstreamSkip(bs, sprite_trajectory_len[i].len); | ||
104 : | return i; | ||
105 : | } | ||
106 : | } | ||
107 : | return -1; | ||
108 : | } | ||
109 : | Isibaar | 1.1 | |
110 : | edgomez | 1.17 | void |
111 : | init_vlc_tables(void) | ||
112 : | Isibaar | 1.1 | { |
113 : | edgomez | 1.42 | uint32_t i, j, k, intra, last, run, run_esc, level, level_esc, escape, escape_len, offset; |
114 : | int32_t l; | ||
115 : | edgomez | 1.38 | |
116 : | #ifdef BIGLUT | ||
117 : | edgomez | 1.42 | intra_table = coeff_VLC[1]; |
118 : | inter_table = coeff_VLC[0]; | ||
119 : | edgomez | 1.37 | #endif |
120 : | |||
121 : | |||
122 : | for (intra = 0; intra < 2; intra++) | ||
123 : | for (i = 0; i < 4096; i++) | ||
124 : | DCT3D[intra][i].event.level = 0; | ||
125 : | |||
126 : | for (intra = 0; intra < 2; intra++) | ||
127 : | for (last = 0; last < 2; last++) | ||
128 : | { | ||
129 : | for (run = 0; run < 63 + last; run++) | ||
130 : | edgomez | 1.41 | for (level = 0; level < (uint32_t)(32 << intra); level++) |
131 : | edgomez | 1.37 | { |
132 : | edgomez | 1.38 | #ifdef BIGLUT |
133 : | edgomez | 1.37 | offset = LEVELOFFSET; |
134 : | #else | ||
135 : | offset = !intra * LEVELOFFSET; | ||
136 : | #endif | ||
137 : | coeff_VLC[intra][last][level + offset][run].len = 128; | ||
138 : | Isibaar | 1.1 | } |
139 : | edgomez | 1.37 | } |
140 : | Isibaar | 1.8 | |
141 : | edgomez | 1.37 | for (intra = 0; intra < 2; intra++) |
142 : | for (i = 0; i < 102; i++) | ||
143 : | { | ||
144 : | edgomez | 1.38 | #ifdef BIGLUT |
145 : | edgomez | 1.37 | offset = LEVELOFFSET; |
146 : | #else | ||
147 : | offset = !intra * LEVELOFFSET; | ||
148 : | #endif | ||
149 : | edgomez | 1.40 | for (j = 0; j < (uint32_t)(1 << (12 - coeff_tab[intra][i].vlc.len)); j++) |
150 : | edgomez | 1.37 | { |
151 : | DCT3D[intra][(coeff_tab[intra][i].vlc.code << (12 - coeff_tab[intra][i].vlc.len)) | j].len = coeff_tab[intra][i].vlc.len; | ||
152 : | DCT3D[intra][(coeff_tab[intra][i].vlc.code << (12 - coeff_tab[intra][i].vlc.len)) | j].event = coeff_tab[intra][i].event; | ||
153 : | } | ||
154 : | Isibaar | 1.8 | |
155 : | edgomez | 1.37 | coeff_VLC[intra][coeff_tab[intra][i].event.last][coeff_tab[intra][i].event.level + offset][coeff_tab[intra][i].event.run].code |
156 : | = coeff_tab[intra][i].vlc.code << 1; | ||
157 : | coeff_VLC[intra][coeff_tab[intra][i].event.last][coeff_tab[intra][i].event.level + offset][coeff_tab[intra][i].event.run].len | ||
158 : | = coeff_tab[intra][i].vlc.len + 1; | ||
159 : | edgomez | 1.38 | #ifndef BIGLUT |
160 : | edgomez | 1.37 | if (!intra) |
161 : | #endif | ||
162 : | { | ||
163 : | coeff_VLC[intra][coeff_tab[intra][i].event.last][offset - coeff_tab[intra][i].event.level][coeff_tab[intra][i].event.run].code | ||
164 : | = (coeff_tab[intra][i].vlc.code << 1) | 1; | ||
165 : | coeff_VLC[intra][coeff_tab[intra][i].event.last][offset - coeff_tab[intra][i].event.level][coeff_tab[intra][i].event.run].len | ||
166 : | = coeff_tab[intra][i].vlc.len + 1; | ||
167 : | Isibaar | 1.1 | } |
168 : | } | ||
169 : | |||
170 : | edgomez | 1.37 | for (intra = 0; intra < 2; intra++) |
171 : | for (last = 0; last < 2; last++) | ||
172 : | for (run = 0; run < 63 + last; run++) | ||
173 : | { | ||
174 : | edgomez | 1.40 | for (level = 1; level < (uint32_t)(32 << intra); level++) |
175 : | edgomez | 1.37 | { |
176 : | edgomez | 1.38 | if (level <= max_level[intra][last][run] && run <= max_run[intra][last][level]) |
177 : | continue; | ||
178 : | |||
179 : | #ifdef BIGLUT | ||
180 : | edgomez | 1.37 | offset = LEVELOFFSET; |
181 : | #else | ||
182 : | offset = !intra * LEVELOFFSET; | ||
183 : | #endif | ||
184 : | edgomez | 1.38 | level_esc = level - max_level[intra][last][run]; |
185 : | run_esc = run - 1 - max_run[intra][last][level]; | ||
186 : | edgomez | 1.42 | /*use this test to use shorter esc2 codes when possible |
187 : | if (level_esc <= max_level[intra][last][run] && run <= max_run[intra][last][level_esc] | ||
188 : | && !(coeff_VLC[intra][last][level_esc + offset][run].len + 7 + 1 | ||
189 : | > coeff_VLC[intra][last][level + offset][run_esc].code + 7 + 2))*/ | ||
190 : | edgomez | 1.38 | |
191 : | if (level_esc <= max_level[intra][last][run] && run <= max_run[intra][last][level_esc]) | ||
192 : | { | ||
193 : | escape = ESCAPE1; | ||
194 : | escape_len = 7 + 1; | ||
195 : | run_esc = run; | ||
196 : | } | ||
197 : | else | ||
198 : | { | ||
199 : | edgomez | 1.40 | if (run_esc <= max_run[intra][last][level] && level <= max_level[intra][last][run_esc]) |
200 : | edgomez | 1.37 | { |
201 : | edgomez | 1.38 | escape = ESCAPE2; |
202 : | escape_len = 7 + 2; | ||
203 : | level_esc = level; | ||
204 : | edgomez | 1.37 | } |
205 : | edgomez | 1.38 | else |
206 : | edgomez | 1.37 | { |
207 : | edgomez | 1.38 | #ifndef BIGLUT |
208 : | edgomez | 1.37 | if (!intra) |
209 : | #endif | ||
210 : | { | ||
211 : | edgomez | 1.38 | coeff_VLC[intra][last][level + offset][run].code |
212 : | = (ESCAPE3 << 21) | (last << 20) | (run << 14) | (1 << 13) | ((level & 0xfff) << 1) | 1; | ||
213 : | coeff_VLC[intra][last][level + offset][run].len = 30; | ||
214 : | coeff_VLC[intra][last][offset - level][run].code | ||
215 : | = (ESCAPE3 << 21) | (last << 20) | (run << 14) | (1 << 13) | ((-level & 0xfff) << 1) | 1; | ||
216 : | coeff_VLC[intra][last][offset - level][run].len = 30; | ||
217 : | edgomez | 1.37 | } |
218 : | edgomez | 1.38 | continue; |
219 : | edgomez | 1.37 | } |
220 : | edgomez | 1.38 | } |
221 : | |||
222 : | coeff_VLC[intra][last][level + offset][run].code | ||
223 : | = (escape << coeff_VLC[intra][last][level_esc + offset][run_esc].len) | ||
224 : | | coeff_VLC[intra][last][level_esc + offset][run_esc].code; | ||
225 : | coeff_VLC[intra][last][level + offset][run].len | ||
226 : | = coeff_VLC[intra][last][level_esc + offset][run_esc].len + escape_len; | ||
227 : | #ifndef BIGLUT | ||
228 : | edgomez | 1.37 | if (!intra) |
229 : | #endif | ||
230 : | edgomez | 1.38 | { |
231 : | coeff_VLC[intra][last][offset - level][run].code | ||
232 : | = (escape << coeff_VLC[intra][last][level_esc + offset][run_esc].len) | ||
233 : | | coeff_VLC[intra][last][level_esc + offset][run_esc].code | 1; | ||
234 : | coeff_VLC[intra][last][offset - level][run].len | ||
235 : | = coeff_VLC[intra][last][level_esc + offset][run_esc].len + escape_len; | ||
236 : | } | ||
237 : | edgomez | 1.37 | } |
238 : | edgomez | 1.38 | |
239 : | #ifdef BIGLUT | ||
240 : | edgomez | 1.42 | for (level = 32 << intra; level < 2048; level++) |
241 : | edgomez | 1.37 | { |
242 : | coeff_VLC[intra][last][level + offset][run].code | ||
243 : | = (ESCAPE3 << 21) | (last << 20) | (run << 14) | (1 << 13) | ((level & 0xfff) << 1) | 1; | ||
244 : | coeff_VLC[intra][last][level + offset][run].len = 30; | ||
245 : | |||
246 : | coeff_VLC[intra][last][offset - level][run].code | ||
247 : | = (ESCAPE3 << 21) | (last << 20) | (run << 14) | (1 << 13) | ((-level & 0xfff) << 1) | 1; | ||
248 : | coeff_VLC[intra][last][offset - level][run].len = 30; | ||
249 : | } | ||
250 : | #else | ||
251 : | if (!intra) | ||
252 : | { | ||
253 : | coeff_VLC[intra][last][0][run].code | ||
254 : | = (ESCAPE3 << 21) | (last << 20) | (run << 14) | (1 << 13) | ((-32 & 0xfff) << 1) | 1; | ||
255 : | coeff_VLC[intra][last][0][run].len = 30; | ||
256 : | } | ||
257 : | #endif | ||
258 : | } | ||
259 : | edgomez | 1.42 | /* init sprite_trajectory tables */ |
260 : | /* even if GMC is not specified (it might be used later...) */ | ||
261 : | edgomez | 1.41 | |
262 : | edgomez | 1.42 | sprite_trajectory_code[0+16384].code = 0; |
263 : | sprite_trajectory_code[0+16384].len = 0; | ||
264 : | for (k=0;k<14;k++) | ||
265 : | { | ||
266 : | int limit = (1<<k); | ||
267 : | edgomez | 1.41 | |
268 : | edgomez | 1.42 | for (l=-(2*limit-1); l <= -limit; l++) |
269 : | { | ||
270 : | sprite_trajectory_code[l+16384].code = (2*limit-1)+l; | ||
271 : | sprite_trajectory_code[l+16384].len = k+1; | ||
272 : | } | ||
273 : | |||
274 : | for (l=limit; l<= 2*limit-1; l++) | ||
275 : | { | ||
276 : | sprite_trajectory_code[l+16384].code = l; | ||
277 : | sprite_trajectory_code[l+16384].len = k+1; | ||
278 : | } | ||
279 : | } | ||
280 : | Isibaar | 1.1 | } |
281 : | |||
282 : | edgomez | 1.17 | static __inline void |
283 : | CodeVector(Bitstream * bs, | ||
284 : | int32_t value, | ||
285 : | int32_t f_code, | ||
286 : | Statistics * pStat) | ||
287 : | Isibaar | 1.1 | { |
288 : | edgomez | 1.7 | |
289 : | Isibaar | 1.1 | const int scale_factor = 1 << (f_code - 1); |
290 : | const int cmp = scale_factor << 5; | ||
291 : | |||
292 : | edgomez | 1.17 | if (value < (-1 * cmp)) |
293 : | Isibaar | 1.1 | value += 64 * scale_factor; |
294 : | edgomez | 1.17 | |
295 : | if (value > (cmp - 1)) | ||
296 : | Isibaar | 1.1 | value -= 64 * scale_factor; |
297 : | |||
298 : | edgomez | 1.7 | pStat->iMvSum += value * value; |
299 : | pStat->iMvCount++; | ||
300 : | Isibaar | 1.1 | |
301 : | edgomez | 1.7 | if (value == 0) { |
302 : | edgomez | 1.17 | BitstreamPutBits(bs, mb_motion_table[32].code, |
303 : | mb_motion_table[32].len); | ||
304 : | edgomez | 1.7 | } else { |
305 : | Isibaar | 1.1 | uint16_t length, code, mv_res, sign; |
306 : | edgomez | 1.17 | |
307 : | Isibaar | 1.1 | length = 16 << f_code; |
308 : | f_code--; | ||
309 : | edgomez | 1.17 | |
310 : | Isibaar | 1.1 | sign = (value < 0); |
311 : | |||
312 : | edgomez | 1.17 | if (value >= length) |
313 : | Isibaar | 1.1 | value -= 2 * length; |
314 : | edgomez | 1.17 | else if (value < -length) |
315 : | Isibaar | 1.1 | value += 2 * length; |
316 : | |||
317 : | edgomez | 1.17 | if (sign) |
318 : | Isibaar | 1.1 | value = -value; |
319 : | |||
320 : | value--; | ||
321 : | mv_res = value & ((1 << f_code) - 1); | ||
322 : | code = ((value - mv_res) >> f_code) + 1; | ||
323 : | |||
324 : | edgomez | 1.17 | if (sign) |
325 : | Isibaar | 1.1 | code = -code; |
326 : | |||
327 : | code += 32; | ||
328 : | edgomez | 1.17 | BitstreamPutBits(bs, mb_motion_table[code].code, |
329 : | mb_motion_table[code].len); | ||
330 : | |||
331 : | if (f_code) | ||
332 : | Isibaar | 1.1 | BitstreamPutBits(bs, mv_res, f_code); |
333 : | edgomez | 1.7 | } |
334 : | |||
335 : | Isibaar | 1.1 | } |
336 : | |||
337 : | edgomez | 1.38 | #ifdef BIGLUT |
338 : | edgomez | 1.37 | |
339 : | edgomez | 1.17 | static __inline void |
340 : | CodeCoeff(Bitstream * bs, | ||
341 : | const int16_t qcoeff[64], | ||
342 : | VLC * table, | ||
343 : | const uint16_t * zigzag, | ||
344 : | uint16_t intra) | ||
345 : | edgomez | 1.7 | { |
346 : | |||
347 : | Isibaar | 1.1 | uint32_t j, last; |
348 : | short v; | ||
349 : | VLC *vlc; | ||
350 : | edgomez | 1.17 | |
351 : | Isibaar | 1.1 | j = intra; |
352 : | Isibaar | 1.10 | last = intra; |
353 : | Isibaar | 1.1 | |
354 : | edgomez | 1.17 | while (j < 64 && (v = qcoeff[zigzag[j]]) == 0) |
355 : | j++; | ||
356 : | |||
357 : | Isibaar | 1.1 | do { |
358 : | edgomez | 1.37 | vlc = table + 64 * 2048 + (v << 6) + j - last; |
359 : | Isibaar | 1.15 | last = ++j; |
360 : | |||
361 : | edgomez | 1.34 | /* count zeroes */ |
362 : | edgomez | 1.17 | while (j < 64 && (v = qcoeff[zigzag[j]]) == 0) |
363 : | j++; | ||
364 : | |||
365 : | edgomez | 1.34 | /* write code */ |
366 : | edgomez | 1.17 | if (j != 64) { |
367 : | Isibaar | 1.1 | BitstreamPutBits(bs, vlc->code, vlc->len); |
368 : | } else { | ||
369 : | edgomez | 1.37 | vlc += 64 * 4096; |
370 : | Isibaar | 1.1 | BitstreamPutBits(bs, vlc->code, vlc->len); |
371 : | break; | ||
372 : | } | ||
373 : | edgomez | 1.17 | } while (1); |
374 : | edgomez | 1.7 | |
375 : | Isibaar | 1.1 | } |
376 : | |||
377 : | edgomez | 1.42 | |
378 : | |||
379 : | /* returns the number of bits required to encode qcoeff */ | ||
380 : | int | ||
381 : | CodeCoeff_CalcBits(const int16_t qcoeff[64], | ||
382 : | VLC * table, | ||
383 : | const uint16_t * zigzag, | ||
384 : | uint16_t intra) | ||
385 : | { | ||
386 : | int bits = 0; | ||
387 : | uint32_t j, last; | ||
388 : | short v; | ||
389 : | VLC *vlc; | ||
390 : | |||
391 : | j = intra; | ||
392 : | last = intra; | ||
393 : | |||
394 : | while (j < 64 && (v = qcoeff[zigzag[j]]) == 0) | ||
395 : | j++; | ||
396 : | |||
397 : | if (j >= 64) return 0; /* empty block */ | ||
398 : | |||
399 : | do { | ||
400 : | vlc = table + 64 * 2048 + (v << 6) + j - last; | ||
401 : | last = ++j; | ||
402 : | |||
403 : | /* count zeroes */ | ||
404 : | while (j < 64 && (v = qcoeff[zigzag[j]]) == 0) | ||
405 : | j++; | ||
406 : | |||
407 : | /* write code */ | ||
408 : | if (j != 64) { | ||
409 : | bits += vlc->len; | ||
410 : | } else { | ||
411 : | vlc += 64 * 4096; | ||
412 : | bits += vlc->len; | ||
413 : | break; | ||
414 : | } | ||
415 : | } while (1); | ||
416 : | |||
417 : | return bits; | ||
418 : | } | ||
419 : | |||
420 : | |||
421 : | edgomez | 1.37 | #else |
422 : | |||
423 : | static __inline void | ||
424 : | CodeCoeffInter(Bitstream * bs, | ||
425 : | const int16_t qcoeff[64], | ||
426 : | const uint16_t * zigzag) | ||
427 : | { | ||
428 : | uint32_t i, run, prev_run, code, len; | ||
429 : | int32_t level, prev_level, level_shifted; | ||
430 : | |||
431 : | i = 0; | ||
432 : | run = 0; | ||
433 : | |||
434 : | while (!(level = qcoeff[zigzag[i++]])) | ||
435 : | run++; | ||
436 : | |||
437 : | prev_level = level; | ||
438 : | prev_run = run; | ||
439 : | run = 0; | ||
440 : | |||
441 : | while (i < 64) | ||
442 : | { | ||
443 : | if ((level = qcoeff[zigzag[i++]]) != 0) | ||
444 : | { | ||
445 : | level_shifted = prev_level + 32; | ||
446 : | if (!(level_shifted & -64)) | ||
447 : | { | ||
448 : | code = coeff_VLC[0][0][level_shifted][prev_run].code; | ||
449 : | len = coeff_VLC[0][0][level_shifted][prev_run].len; | ||
450 : | } | ||
451 : | else | ||
452 : | { | ||
453 : | code = (ESCAPE3 << 21) | (prev_run << 14) | (1 << 13) | ((prev_level & 0xfff) << 1) | 1; | ||
454 : | len = 30; | ||
455 : | } | ||
456 : | BitstreamPutBits(bs, code, len); | ||
457 : | prev_level = level; | ||
458 : | prev_run = run; | ||
459 : | run = 0; | ||
460 : | } | ||
461 : | else | ||
462 : | run++; | ||
463 : | } | ||
464 : | |||
465 : | level_shifted = prev_level + 32; | ||
466 : | if (!(level_shifted & -64)) | ||
467 : | { | ||
468 : | code = coeff_VLC[0][1][level_shifted][prev_run].code; | ||
469 : | len = coeff_VLC[0][1][level_shifted][prev_run].len; | ||
470 : | } | ||
471 : | else | ||
472 : | { | ||
473 : | code = (ESCAPE3 << 21) | (1 << 20) | (prev_run << 14) | (1 << 13) | ((prev_level & 0xfff) << 1) | 1; | ||
474 : | len = 30; | ||
475 : | } | ||
476 : | BitstreamPutBits(bs, code, len); | ||
477 : | } | ||
478 : | |||
479 : | static __inline void | ||
480 : | CodeCoeffIntra(Bitstream * bs, | ||
481 : | const int16_t qcoeff[64], | ||
482 : | const uint16_t * zigzag) | ||
483 : | { | ||
484 : | uint32_t i, abs_level, run, prev_run, code, len; | ||
485 : | int32_t level, prev_level; | ||
486 : | |||
487 : | i = 1; | ||
488 : | run = 0; | ||
489 : | |||
490 : | edgomez | 1.42 | while (i<64 && !(level = qcoeff[zigzag[i++]])) |
491 : | edgomez | 1.37 | run++; |
492 : | |||
493 : | prev_level = level; | ||
494 : | prev_run = run; | ||
495 : | run = 0; | ||
496 : | |||
497 : | while (i < 64) | ||
498 : | { | ||
499 : | if ((level = qcoeff[zigzag[i++]]) != 0) | ||
500 : | { | ||
501 : | abs_level = ABS(prev_level); | ||
502 : | abs_level = abs_level < 64 ? abs_level : 0; | ||
503 : | code = coeff_VLC[1][0][abs_level][prev_run].code; | ||
504 : | len = coeff_VLC[1][0][abs_level][prev_run].len; | ||
505 : | if (len != 128) | ||
506 : | code |= (prev_level < 0); | ||
507 : | else | ||
508 : | { | ||
509 : | code = (ESCAPE3 << 21) | (prev_run << 14) | (1 << 13) | ((prev_level & 0xfff) << 1) | 1; | ||
510 : | len = 30; | ||
511 : | } | ||
512 : | BitstreamPutBits(bs, code, len); | ||
513 : | prev_level = level; | ||
514 : | prev_run = run; | ||
515 : | run = 0; | ||
516 : | } | ||
517 : | else | ||
518 : | run++; | ||
519 : | } | ||
520 : | |||
521 : | abs_level = ABS(prev_level); | ||
522 : | abs_level = abs_level < 64 ? abs_level : 0; | ||
523 : | code = coeff_VLC[1][1][abs_level][prev_run].code; | ||
524 : | len = coeff_VLC[1][1][abs_level][prev_run].len; | ||
525 : | if (len != 128) | ||
526 : | code |= (prev_level < 0); | ||
527 : | else | ||
528 : | { | ||
529 : | code = (ESCAPE3 << 21) | (1 << 20) | (prev_run << 14) | (1 << 13) | ((prev_level & 0xfff) << 1) | 1; | ||
530 : | len = 30; | ||
531 : | } | ||
532 : | BitstreamPutBits(bs, code, len); | ||
533 : | } | ||
534 : | |||
535 : | edgomez | 1.42 | |
536 : | |||
537 : | /* returns the number of bits required to encode qcoeff */ | ||
538 : | |||
539 : | int | ||
540 : | CodeCoeffIntra_CalcBits(const int16_t qcoeff[64], const uint16_t * zigzag) | ||
541 : | { | ||
542 : | int bits = 0; | ||
543 : | uint32_t i, abs_level, run, prev_run, len; | ||
544 : | int32_t level, prev_level; | ||
545 : | |||
546 : | i = 1; | ||
547 : | run = 0; | ||
548 : | |||
549 : | while (i<64 && !(level = qcoeff[zigzag[i++]])) | ||
550 : | run++; | ||
551 : | |||
552 : | if (i >= 64) return 0; /* empty block */ | ||
553 : | |||
554 : | prev_level = level; | ||
555 : | prev_run = run; | ||
556 : | run = 0; | ||
557 : | |||
558 : | while (i < 64) | ||
559 : | { | ||
560 : | if ((level = qcoeff[zigzag[i++]]) != 0) | ||
561 : | { | ||
562 : | abs_level = ABS(prev_level); | ||
563 : | abs_level = abs_level < 64 ? abs_level : 0; | ||
564 : | len = coeff_VLC[1][0][abs_level][prev_run].len; | ||
565 : | bits += len!=128 ? len : 30; | ||
566 : | |||
567 : | prev_level = level; | ||
568 : | prev_run = run; | ||
569 : | run = 0; | ||
570 : | } | ||
571 : | else | ||
572 : | run++; | ||
573 : | } | ||
574 : | |||
575 : | abs_level = ABS(prev_level); | ||
576 : | abs_level = abs_level < 64 ? abs_level : 0; | ||
577 : | len = coeff_VLC[1][1][abs_level][prev_run].len; | ||
578 : | bits += len!=128 ? len : 30; | ||
579 : | |||
580 : | return bits; | ||
581 : | } | ||
582 : | |||
583 : | int | ||
584 : | CodeCoeffInter_CalcBits(const int16_t qcoeff[64], const uint16_t * zigzag) | ||
585 : | { | ||
586 : | uint32_t i, run, prev_run, len; | ||
587 : | int32_t level, prev_level, level_shifted; | ||
588 : | int bits = 0; | ||
589 : | |||
590 : | i = 0; | ||
591 : | run = 0; | ||
592 : | |||
593 : | while (!(level = qcoeff[zigzag[i++]])) | ||
594 : | run++; | ||
595 : | |||
596 : | prev_level = level; | ||
597 : | prev_run = run; | ||
598 : | run = 0; | ||
599 : | |||
600 : | while (i < 64) { | ||
601 : | if ((level = qcoeff[zigzag[i++]]) != 0) { | ||
602 : | level_shifted = prev_level + 32; | ||
603 : | if (!(level_shifted & -64)) | ||
604 : | len = coeff_VLC[0][0][level_shifted][prev_run].len; | ||
605 : | else | ||
606 : | len = 30; | ||
607 : | |||
608 : | bits += len; | ||
609 : | prev_level = level; | ||
610 : | prev_run = run; | ||
611 : | run = 0; | ||
612 : | } | ||
613 : | else | ||
614 : | run++; | ||
615 : | } | ||
616 : | |||
617 : | level_shifted = prev_level + 32; | ||
618 : | if (!(level_shifted & -64)) | ||
619 : | len = coeff_VLC[0][1][level_shifted][prev_run].len; | ||
620 : | else | ||
621 : | len = 30; | ||
622 : | bits += len; | ||
623 : | |||
624 : | return bits; | ||
625 : | } | ||
626 : | |||
627 : | |||
628 : | edgomez | 1.37 | #endif |
629 : | |||
630 : | edgomez | 1.42 | static __inline void |
631 : | CodeBlockIntra(const FRAMEINFO * const frame, | ||
632 : | edgomez | 1.17 | const MACROBLOCK * pMB, |
633 : | int16_t qcoeff[6 * 64], | ||
634 : | edgomez | 1.7 | Bitstream * bs, |
635 : | Statistics * pStat) | ||
636 : | Isibaar | 1.1 | { |
637 : | edgomez | 1.7 | |
638 : | Isibaar | 1.1 | uint32_t i, mcbpc, cbpy, bits; |
639 : | |||
640 : | cbpy = pMB->cbp >> 2; | ||
641 : | |||
642 : | edgomez | 1.42 | // write mcbpc |
643 : | edgomez | 1.17 | if (frame->coding_type == I_VOP) { |
644 : | edgomez | 1.7 | mcbpc = ((pMB->mode >> 1) & 3) | ((pMB->cbp & 3) << 2); |
645 : | edgomez | 1.17 | BitstreamPutBits(bs, mcbpc_intra_tab[mcbpc].code, |
646 : | mcbpc_intra_tab[mcbpc].len); | ||
647 : | } else { | ||
648 : | edgomez | 1.7 | mcbpc = (pMB->mode & 7) | ((pMB->cbp & 3) << 3); |
649 : | edgomez | 1.17 | BitstreamPutBits(bs, mcbpc_inter_tab[mcbpc].code, |
650 : | mcbpc_inter_tab[mcbpc].len); | ||
651 : | Isibaar | 1.4 | } |
652 : | Isibaar | 1.1 | |
653 : | edgomez | 1.42 | // ac prediction flag |
654 : | edgomez | 1.17 | if (pMB->acpred_directions[0]) |
655 : | edgomez | 1.7 | BitstreamPutBits(bs, 1, 1); |
656 : | Isibaar | 1.1 | else |
657 : | edgomez | 1.7 | BitstreamPutBits(bs, 0, 1); |
658 : | Isibaar | 1.1 | |
659 : | edgomez | 1.42 | // write cbpy |
660 : | edgomez | 1.17 | BitstreamPutBits(bs, cbpy_tab[cbpy].code, cbpy_tab[cbpy].len); |
661 : | Isibaar | 1.1 | |
662 : | edgomez | 1.42 | // write dquant |
663 : | edgomez | 1.17 | if (pMB->mode == MODE_INTRA_Q) |
664 : | Isibaar | 1.1 | BitstreamPutBits(bs, pMB->dquant, 2); |
665 : | |||
666 : | edgomez | 1.42 | // write interlacing |
667 : | edgomez | 1.17 | if (frame->global_flags & XVID_INTERLACING) { |
668 : | h | 1.6 | BitstreamPutBit(bs, pMB->field_dct); |
669 : | } | ||
670 : | edgomez | 1.42 | // code block coeffs |
671 : | edgomez | 1.17 | for (i = 0; i < 6; i++) { |
672 : | if (i < 4) | ||
673 : | BitstreamPutBits(bs, dcy_tab[qcoeff[i * 64 + 0] + 255].code, | ||
674 : | dcy_tab[qcoeff[i * 64 + 0] + 255].len); | ||
675 : | Isibaar | 1.1 | else |
676 : | edgomez | 1.17 | BitstreamPutBits(bs, dcc_tab[qcoeff[i * 64 + 0] + 255].code, |
677 : | dcc_tab[qcoeff[i * 64 + 0] + 255].len); | ||
678 : | |||
679 : | if (pMB->cbp & (1 << (5 - i))) { | ||
680 : | edgomez | 1.42 | const uint16_t *scan_table = |
681 : | frame->global_flags & XVID_ALTERNATESCAN ? | ||
682 : | scan_tables[2] : scan_tables[pMB->acpred_directions[i]]; | ||
683 : | |||
684 : | Isibaar | 1.1 | bits = BitstreamPos(bs); |
685 : | |||
686 : | edgomez | 1.38 | #ifdef BIGLUT |
687 : | edgomez | 1.42 | CodeCoeff(bs, &qcoeff[i * 64], intra_table, scan_table, 1); |
688 : | edgomez | 1.37 | #else |
689 : | edgomez | 1.42 | CodeCoeffIntra(bs, &qcoeff[i * 64], scan_table); |
690 : | edgomez | 1.37 | #endif |
691 : | edgomez | 1.42 | |
692 : | Isibaar | 1.1 | bits = BitstreamPos(bs) - bits; |
693 : | pStat->iTextBits += bits; | ||
694 : | } | ||
695 : | } | ||
696 : | edgomez | 1.7 | |
697 : | Isibaar | 1.1 | } |
698 : | |||
699 : | |||
700 : | edgomez | 1.17 | static void |
701 : | edgomez | 1.42 | CodeBlockInter(const FRAMEINFO * const frame, |
702 : | edgomez | 1.17 | const MACROBLOCK * pMB, |
703 : | int16_t qcoeff[6 * 64], | ||
704 : | edgomez | 1.7 | Bitstream * bs, |
705 : | Statistics * pStat) | ||
706 : | Isibaar | 1.1 | { |
707 : | edgomez | 1.7 | |
708 : | Isibaar | 1.1 | int32_t i; |
709 : | uint32_t bits, mcbpc, cbpy; | ||
710 : | |||
711 : | edgomez | 1.7 | mcbpc = (pMB->mode & 7) | ((pMB->cbp & 3) << 3); |
712 : | Isibaar | 1.1 | cbpy = 15 - (pMB->cbp >> 2); |
713 : | |||
714 : | edgomez | 1.42 | // write mcbpc |
715 : | edgomez | 1.17 | BitstreamPutBits(bs, mcbpc_inter_tab[mcbpc].code, |
716 : | mcbpc_inter_tab[mcbpc].len); | ||
717 : | Isibaar | 1.1 | |
718 : | edgomez | 1.42 | if ( (frame->coding_type == S_VOP) && (pMB->mode == MODE_INTER || pMB->mode == MODE_INTER_Q) ) |
719 : | BitstreamPutBit(bs, pMB->mcsel); // mcsel: '0'=local motion, '1'=GMC | ||
720 : | |||
721 : | // write cbpy | ||
722 : | Isibaar | 1.1 | BitstreamPutBits(bs, cbpy_tab[cbpy].code, cbpy_tab[cbpy].len); |
723 : | |||
724 : | edgomez | 1.42 | // write dquant |
725 : | edgomez | 1.17 | if (pMB->mode == MODE_INTER_Q) |
726 : | Isibaar | 1.1 | BitstreamPutBits(bs, pMB->dquant, 2); |
727 : | edgomez | 1.17 | |
728 : | edgomez | 1.42 | // interlacing |
729 : | edgomez | 1.17 | if (frame->global_flags & XVID_INTERLACING) { |
730 : | h | 1.25 | if (pMB->cbp) { |
731 : | BitstreamPutBit(bs, pMB->field_dct); | ||
732 : | edgomez | 1.42 | DPRINTF(DPRINTF_MB,"codep: field_dct: %i", pMB->field_dct); |
733 : | h | 1.25 | } |
734 : | h | 1.6 | |
735 : | edgomez | 1.42 | // if inter block, write field ME flag |
736 : | edgomez | 1.17 | if (pMB->mode == MODE_INTER || pMB->mode == MODE_INTER_Q) { |
737 : | h | 1.6 | BitstreamPutBit(bs, pMB->field_pred); |
738 : | edgomez | 1.42 | DPRINTF(DPRINTF_MB,"codep: field_pred: %i", pMB->field_pred); |
739 : | h | 1.6 | |
740 : | edgomez | 1.42 | // write field prediction references |
741 : | edgomez | 1.17 | if (pMB->field_pred) { |
742 : | h | 1.6 | BitstreamPutBit(bs, pMB->field_for_top); |
743 : | BitstreamPutBit(bs, pMB->field_for_bot); | ||
744 : | } | ||
745 : | } | ||
746 : | } | ||
747 : | edgomez | 1.42 | // code motion vector(s) if motion is local |
748 : | if (!pMB->mcsel) | ||
749 : | for (i = 0; i < (pMB->mode == MODE_INTER4V ? 4 : 1); i++) { | ||
750 : | CodeVector(bs, pMB->pmvs[i].x, frame->fcode, pStat); | ||
751 : | CodeVector(bs, pMB->pmvs[i].y, frame->fcode, pStat); | ||
752 : | } | ||
753 : | Isibaar | 1.1 | |
754 : | bits = BitstreamPos(bs); | ||
755 : | edgomez | 1.17 | |
756 : | edgomez | 1.42 | // code block coeffs |
757 : | edgomez | 1.17 | for (i = 0; i < 6; i++) |
758 : | if (pMB->cbp & (1 << (5 - i))) | ||
759 : | edgomez | 1.42 | { |
760 : | const uint16_t *scan_table = | ||
761 : | frame->global_flags & XVID_ALTERNATESCAN ? | ||
762 : | scan_tables[2] : scan_tables[0]; | ||
763 : | |||
764 : | edgomez | 1.38 | #ifdef BIGLUT |
765 : | edgomez | 1.42 | CodeCoeff(bs, &qcoeff[i * 64], inter_table, scan_table, 0); |
766 : | edgomez | 1.37 | #else |
767 : | edgomez | 1.42 | CodeCoeffInter(bs, &qcoeff[i * 64], scan_table); |
768 : | edgomez | 1.37 | #endif |
769 : | edgomez | 1.42 | } |
770 : | Isibaar | 1.1 | |
771 : | bits = BitstreamPos(bs) - bits; | ||
772 : | pStat->iTextBits += bits; | ||
773 : | } | ||
774 : | |||
775 : | |||
776 : | edgomez | 1.17 | void |
777 : | edgomez | 1.42 | MBCoding(const FRAMEINFO * const frame, |
778 : | edgomez | 1.17 | MACROBLOCK * pMB, |
779 : | int16_t qcoeff[6 * 64], | ||
780 : | Bitstream * bs, | ||
781 : | Statistics * pStat) | ||
782 : | Isibaar | 1.1 | { |
783 : | edgomez | 1.42 | if (frame->coding_type != I_VOP) |
784 : | BitstreamPutBit(bs, 0); // not_coded | ||
785 : | |||
786 : | chl | 1.22 | if (pMB->mode == MODE_INTRA || pMB->mode == MODE_INTRA_Q) |
787 : | suxen_drol | 1.13 | CodeBlockIntra(frame, pMB, qcoeff, bs, pStat); |
788 : | Isibaar | 1.1 | else |
789 : | suxen_drol | 1.13 | CodeBlockInter(frame, pMB, qcoeff, bs, pStat); |
790 : | edgomez | 1.7 | |
791 : | Isibaar | 1.1 | } |
792 : | chl | 1.24 | |
793 : | edgomez | 1.42 | /* |
794 : | // moved to mbcoding.h so that in can be 'static __inline' | ||
795 : | chl | 1.24 | void |
796 : | MBSkip(Bitstream * bs) | ||
797 : | { | ||
798 : | edgomez | 1.42 | BitstreamPutBit(bs, 1); // not coded |
799 : | chl | 1.24 | } |
800 : | edgomez | 1.42 | */ |
801 : | Isibaar | 1.1 | |
802 : | edgomez | 1.42 | /*************************************************************** |
803 : | * bframe encoding start | ||
804 : | ***************************************************************/ | ||
805 : | Isibaar | 1.1 | |
806 : | edgomez | 1.27 | /* |
807 : | edgomez | 1.42 | mbtype |
808 : | 0 1b direct(h263) mvdb | ||
809 : | 1 01b interpolate mc+q dbquant, mvdf, mvdb | ||
810 : | 2 001b backward mc+q dbquant, mvdb | ||
811 : | 3 0001b forward mc+q dbquant, mvdf | ||
812 : | */ | ||
813 : | suxen_drol | 1.19 | |
814 : | edgomez | 1.42 | static __inline void |
815 : | put_bvop_mbtype(Bitstream * bs, | ||
816 : | int value) | ||
817 : | { | ||
818 : | switch (value) { | ||
819 : | case MODE_FORWARD: | ||
820 : | BitstreamPutBit(bs, 0); | ||
821 : | case MODE_BACKWARD: | ||
822 : | BitstreamPutBit(bs, 0); | ||
823 : | case MODE_INTERPOLATE: | ||
824 : | BitstreamPutBit(bs, 0); | ||
825 : | case MODE_DIRECT: | ||
826 : | BitstreamPutBit(bs, 1); | ||
827 : | default: | ||
828 : | break; | ||
829 : | } | ||
830 : | } | ||
831 : | |||
832 : | /* | ||
833 : | dbquant | ||
834 : | -2 10b | ||
835 : | 0 0b | ||
836 : | +2 11b | ||
837 : | */ | ||
838 : | |||
839 : | static __inline void | ||
840 : | put_bvop_dbquant(Bitstream * bs, | ||
841 : | int value) | ||
842 : | { | ||
843 : | switch (value) { | ||
844 : | case 0: | ||
845 : | BitstreamPutBit(bs, 0); | ||
846 : | return; | ||
847 : | |||
848 : | case -2: | ||
849 : | BitstreamPutBit(bs, 1); | ||
850 : | BitstreamPutBit(bs, 0); | ||
851 : | return; | ||
852 : | |||
853 : | case 2: | ||
854 : | BitstreamPutBit(bs, 1); | ||
855 : | BitstreamPutBit(bs, 1); | ||
856 : | return; | ||
857 : | |||
858 : | default:; // invalid | ||
859 : | } | ||
860 : | } | ||
861 : | |||
862 : | |||
863 : | |||
864 : | void | ||
865 : | MBCodingBVOP(const MACROBLOCK * mb, | ||
866 : | const int16_t qcoeff[6 * 64], | ||
867 : | const int32_t fcode, | ||
868 : | const int32_t bcode, | ||
869 : | Bitstream * bs, | ||
870 : | Statistics * pStat, | ||
871 : | int direction) | ||
872 : | { | ||
873 : | int vcode = fcode; | ||
874 : | unsigned int i; | ||
875 : | |||
876 : | /* ------------------------------------------------------------------ | ||
877 : | when a block is skipped it is decoded DIRECT(0,0) | ||
878 : | hence is interpolated from forward & backward frames | ||
879 : | ------------------------------------------------------------------ */ | ||
880 : | |||
881 : | if (mb->mode == MODE_DIRECT_NONE_MV) { | ||
882 : | BitstreamPutBit(bs, 1); // skipped | ||
883 : | return; | ||
884 : | } | ||
885 : | |||
886 : | BitstreamPutBit(bs, 0); // not skipped | ||
887 : | |||
888 : | if (mb->cbp == 0) { | ||
889 : | BitstreamPutBit(bs, 1); // cbp == 0 | ||
890 : | } else { | ||
891 : | BitstreamPutBit(bs, 0); // cbp == xxx | ||
892 : | } | ||
893 : | |||
894 : | put_bvop_mbtype(bs, mb->mode); | ||
895 : | |||
896 : | if (mb->cbp) { | ||
897 : | BitstreamPutBits(bs, mb->cbp, 6); | ||
898 : | } | ||
899 : | |||
900 : | if (mb->mode != MODE_DIRECT && mb->cbp != 0) { | ||
901 : | put_bvop_dbquant(bs, 0); // todo: mb->dquant = 0 | ||
902 : | } | ||
903 : | |||
904 : | switch (mb->mode) { | ||
905 : | case MODE_INTERPOLATE: | ||
906 : | CodeVector(bs, mb->pmvs[1].x, vcode, pStat); //forward vector of interpolate mode | ||
907 : | CodeVector(bs, mb->pmvs[1].y, vcode, pStat); | ||
908 : | case MODE_BACKWARD: | ||
909 : | vcode = bcode; | ||
910 : | case MODE_FORWARD: | ||
911 : | CodeVector(bs, mb->pmvs[0].x, vcode, pStat); | ||
912 : | CodeVector(bs, mb->pmvs[0].y, vcode, pStat); | ||
913 : | break; | ||
914 : | case MODE_DIRECT: | ||
915 : | CodeVector(bs, mb->pmvs[3].x, 1, pStat); // fcode is always 1 for delta vector | ||
916 : | CodeVector(bs, mb->pmvs[3].y, 1, pStat); // prediction is always (0,0) | ||
917 : | default: break; | ||
918 : | } | ||
919 : | |||
920 : | for (i = 0; i < 6; i++) { | ||
921 : | if (mb->cbp & (1 << (5 - i))) { | ||
922 : | #ifdef BIGLUT | ||
923 : | CodeCoeff(bs, &qcoeff[i * 64], inter_table, scan_tables[0], 0); | ||
924 : | #else | ||
925 : | CodeCoeffInter(bs, &qcoeff[i * 64], scan_tables[0]); | ||
926 : | #endif | ||
927 : | } | ||
928 : | } | ||
929 : | } | ||
930 : | |||
931 : | |||
932 : | |||
933 : | /*************************************************************** | ||
934 : | * decoding stuff starts here * | ||
935 : | ***************************************************************/ | ||
936 : | |||
937 : | |||
938 : | // for IVOP addbits == 0 | ||
939 : | // for PVOP addbits == fcode - 1 | ||
940 : | // for BVOP addbits == max(fcode,bcode) - 1 | ||
941 : | // returns true or false | ||
942 : | suxen_drol | 1.19 | int |
943 : | check_resync_marker(Bitstream * bs, int addbits) | ||
944 : | { | ||
945 : | uint32_t nbits; | ||
946 : | uint32_t code; | ||
947 : | uint32_t nbitsresyncmarker = NUMBITS_VP_RESYNC_MARKER + addbits; | ||
948 : | |||
949 : | nbits = BitstreamNumBitsToByteAlign(bs); | ||
950 : | code = BitstreamShowBits(bs, nbits); | ||
951 : | |||
952 : | if (code == (((uint32_t)1 << (nbits - 1)) - 1)) | ||
953 : | { | ||
954 : | return BitstreamShowBitsFromByteAlign(bs, nbitsresyncmarker) == RESYNC_MARKER; | ||
955 : | } | ||
956 : | |||
957 : | return 0; | ||
958 : | } | ||
959 : | |||
960 : | |||
961 : | |||
962 : | edgomez | 1.17 | int |
963 : | get_mcbpc_intra(Bitstream * bs) | ||
964 : | Isibaar | 1.1 | { |
965 : | edgomez | 1.7 | |
966 : | Isibaar | 1.1 | uint32_t index; |
967 : | edgomez | 1.17 | |
968 : | suxen_drol | 1.19 | index = BitstreamShowBits(bs, 9); |
969 : | Isibaar | 1.1 | index >>= 3; |
970 : | |||
971 : | BitstreamSkip(bs, mcbpc_intra_table[index].len); | ||
972 : | edgomez | 1.7 | |
973 : | Isibaar | 1.1 | return mcbpc_intra_table[index].code; |
974 : | edgomez | 1.7 | |
975 : | Isibaar | 1.1 | } |
976 : | |||
977 : | edgomez | 1.17 | int |
978 : | get_mcbpc_inter(Bitstream * bs) | ||
979 : | Isibaar | 1.1 | { |
980 : | edgomez | 1.7 | |
981 : | Isibaar | 1.1 | uint32_t index; |
982 : | suxen_drol | 1.19 | |
983 : | edgomez | 1.42 | index = MIN(BitstreamShowBits(bs, 9), 256); |
984 : | Isibaar | 1.1 | |
985 : | edgomez | 1.17 | BitstreamSkip(bs, mcbpc_inter_table[index].len); |
986 : | edgomez | 1.7 | |
987 : | Isibaar | 1.1 | return mcbpc_inter_table[index].code; |
988 : | edgomez | 1.7 | |
989 : | Isibaar | 1.1 | } |
990 : | |||
991 : | edgomez | 1.17 | int |
992 : | get_cbpy(Bitstream * bs, | ||
993 : | int intra) | ||
994 : | Isibaar | 1.1 | { |
995 : | edgomez | 1.7 | |
996 : | Isibaar | 1.1 | int cbpy; |
997 : | uint32_t index = BitstreamShowBits(bs, 6); | ||
998 : | |||
999 : | BitstreamSkip(bs, cbpy_table[index].len); | ||
1000 : | cbpy = cbpy_table[index].code; | ||
1001 : | |||
1002 : | edgomez | 1.17 | if (!intra) |
1003 : | Isibaar | 1.1 | cbpy = 15 - cbpy; |
1004 : | |||
1005 : | return cbpy; | ||
1006 : | edgomez | 1.7 | |
1007 : | Isibaar | 1.1 | } |
1008 : | |||
1009 : | edgomez | 1.42 | static __inline int |
1010 : | edgomez | 1.17 | get_mv_data(Bitstream * bs) |
1011 : | Isibaar | 1.1 | { |
1012 : | edgomez | 1.7 | |
1013 : | Isibaar | 1.1 | uint32_t index; |
1014 : | |||
1015 : | edgomez | 1.17 | if (BitstreamGetBit(bs)) |
1016 : | Isibaar | 1.1 | return 0; |
1017 : | edgomez | 1.17 | |
1018 : | Isibaar | 1.1 | index = BitstreamShowBits(bs, 12); |
1019 : | |||
1020 : | edgomez | 1.17 | if (index >= 512) { |
1021 : | Isibaar | 1.1 | index = (index >> 8) - 2; |
1022 : | BitstreamSkip(bs, TMNMVtab0[index].len); | ||
1023 : | return TMNMVtab0[index].code; | ||
1024 : | } | ||
1025 : | edgomez | 1.17 | |
1026 : | if (index >= 128) { | ||
1027 : | Isibaar | 1.1 | index = (index >> 2) - 32; |
1028 : | BitstreamSkip(bs, TMNMVtab1[index].len); | ||
1029 : | return TMNMVtab1[index].code; | ||
1030 : | } | ||
1031 : | |||
1032 : | edgomez | 1.17 | index -= 4; |
1033 : | Isibaar | 1.1 | |
1034 : | BitstreamSkip(bs, TMNMVtab2[index].len); | ||
1035 : | return TMNMVtab2[index].code; | ||
1036 : | edgomez | 1.7 | |
1037 : | Isibaar | 1.1 | } |
1038 : | |||
1039 : | edgomez | 1.17 | int |
1040 : | get_mv(Bitstream * bs, | ||
1041 : | int fcode) | ||
1042 : | Isibaar | 1.1 | { |
1043 : | edgomez | 1.7 | |
1044 : | Isibaar | 1.1 | int data; |
1045 : | int res; | ||
1046 : | int mv; | ||
1047 : | int scale_fac = 1 << (fcode - 1); | ||
1048 : | |||
1049 : | data = get_mv_data(bs); | ||
1050 : | edgomez | 1.17 | |
1051 : | if (scale_fac == 1 || data == 0) | ||
1052 : | Isibaar | 1.1 | return data; |
1053 : | |||
1054 : | res = BitstreamGetBits(bs, fcode - 1); | ||
1055 : | mv = ((ABS(data) - 1) * scale_fac) + res + 1; | ||
1056 : | edgomez | 1.17 | |
1057 : | Isibaar | 1.1 | return data < 0 ? -mv : mv; |
1058 : | edgomez | 1.7 | |
1059 : | Isibaar | 1.1 | } |
1060 : | |||
1061 : | edgomez | 1.17 | int |
1062 : | get_dc_dif(Bitstream * bs, | ||
1063 : | uint32_t dc_size) | ||
1064 : | Isibaar | 1.1 | { |
1065 : | edgomez | 1.7 | |
1066 : | Isibaar | 1.1 | int code = BitstreamGetBits(bs, dc_size); |
1067 : | int msb = code >> (dc_size - 1); | ||
1068 : | |||
1069 : | edgomez | 1.17 | if (msb == 0) |
1070 : | return (-1 * (code ^ ((1 << dc_size) - 1))); | ||
1071 : | Isibaar | 1.1 | |
1072 : | return code; | ||
1073 : | edgomez | 1.7 | |
1074 : | Isibaar | 1.1 | } |
1075 : | |||
1076 : | edgomez | 1.17 | int |
1077 : | get_dc_size_lum(Bitstream * bs) | ||
1078 : | Isibaar | 1.1 | { |
1079 : | edgomez | 1.7 | |
1080 : | Isibaar | 1.1 | int code, i; |
1081 : | edgomez | 1.17 | |
1082 : | Isibaar | 1.1 | code = BitstreamShowBits(bs, 11); |
1083 : | |||
1084 : | edgomez | 1.17 | for (i = 11; i > 3; i--) { |
1085 : | if (code == 1) { | ||
1086 : | Isibaar | 1.1 | BitstreamSkip(bs, i); |
1087 : | return i + 1; | ||
1088 : | } | ||
1089 : | code >>= 1; | ||
1090 : | } | ||
1091 : | |||
1092 : | BitstreamSkip(bs, dc_lum_tab[code].len); | ||
1093 : | return dc_lum_tab[code].code; | ||
1094 : | edgomez | 1.7 | |
1095 : | Isibaar | 1.1 | } |
1096 : | |||
1097 : | |||
1098 : | edgomez | 1.17 | int |
1099 : | get_dc_size_chrom(Bitstream * bs) | ||
1100 : | Isibaar | 1.1 | { |
1101 : | edgomez | 1.7 | |
1102 : | Isibaar | 1.1 | uint32_t code, i; |
1103 : | edgomez | 1.17 | |
1104 : | Isibaar | 1.1 | code = BitstreamShowBits(bs, 12); |
1105 : | |||
1106 : | edgomez | 1.17 | for (i = 12; i > 2; i--) { |
1107 : | if (code == 1) { | ||
1108 : | Isibaar | 1.1 | BitstreamSkip(bs, i); |
1109 : | return i; | ||
1110 : | } | ||
1111 : | code >>= 1; | ||
1112 : | } | ||
1113 : | |||
1114 : | return 3 - BitstreamGetBits(bs, 2); | ||
1115 : | edgomez | 1.7 | |
1116 : | Isibaar | 1.1 | } |
1117 : | edgomez | 1.27 | |
1118 : | static __inline int | ||
1119 : | get_coeff(Bitstream * bs, | ||
1120 : | int *run, | ||
1121 : | int *last, | ||
1122 : | int intra, | ||
1123 : | int short_video_header) | ||
1124 : | { | ||
1125 : | |||
1126 : | uint32_t mode; | ||
1127 : | int32_t level; | ||
1128 : | edgomez | 1.37 | REVERSE_EVENT *reverse_event; |
1129 : | edgomez | 1.27 | |
1130 : | edgomez | 1.34 | if (short_video_header) /* inter-VLCs will be used for both intra and inter blocks */ |
1131 : | edgomez | 1.27 | intra = 0; |
1132 : | |||
1133 : | edgomez | 1.37 | if (BitstreamShowBits(bs, 7) != ESCAPE) { |
1134 : | reverse_event = &DCT3D[intra][BitstreamShowBits(bs, 12)]; | ||
1135 : | |||
1136 : | if ((level = reverse_event->event.level) == 0) | ||
1137 : | goto error; | ||
1138 : | edgomez | 1.27 | |
1139 : | edgomez | 1.37 | *last = reverse_event->event.last; |
1140 : | *run = reverse_event->event.run; | ||
1141 : | edgomez | 1.27 | |
1142 : | edgomez | 1.37 | BitstreamSkip(bs, reverse_event->len); |
1143 : | edgomez | 1.27 | |
1144 : | edgomez | 1.37 | return BitstreamGetBits(bs, 1) ? -level : level; |
1145 : | edgomez | 1.27 | } |
1146 : | |||
1147 : | edgomez | 1.37 | BitstreamSkip(bs, 7); |
1148 : | |||
1149 : | edgomez | 1.27 | if (short_video_header) { |
1150 : | edgomez | 1.34 | /* escape mode 4 - H.263 type, only used if short_video_header = 1 */ |
1151 : | edgomez | 1.27 | *last = BitstreamGetBit(bs); |
1152 : | *run = BitstreamGetBits(bs, 6); | ||
1153 : | level = BitstreamGetBits(bs, 8); | ||
1154 : | |||
1155 : | if (level == 0 || level == 128) | ||
1156 : | edgomez | 1.32 | DPRINTF(DPRINTF_ERROR, "Illegal LEVEL for ESCAPE mode 4: %d", level); |
1157 : | edgomez | 1.27 | |
1158 : | edgomez | 1.37 | return (level << 24) >> 24; |
1159 : | edgomez | 1.27 | } |
1160 : | |||
1161 : | mode = BitstreamShowBits(bs, 2); | ||
1162 : | |||
1163 : | if (mode < 3) { | ||
1164 : | BitstreamSkip(bs, (mode == 2) ? 2 : 1); | ||
1165 : | |||
1166 : | edgomez | 1.37 | reverse_event = &DCT3D[intra][BitstreamShowBits(bs, 12)]; |
1167 : | |||
1168 : | if ((level = reverse_event->event.level) == 0) | ||
1169 : | edgomez | 1.27 | goto error; |
1170 : | |||
1171 : | edgomez | 1.37 | *last = reverse_event->event.last; |
1172 : | *run = reverse_event->event.run; | ||
1173 : | edgomez | 1.27 | |
1174 : | edgomez | 1.37 | BitstreamSkip(bs, reverse_event->len); |
1175 : | edgomez | 1.27 | |
1176 : | edgomez | 1.34 | if (mode < 2) /* first escape mode, level is offset */ |
1177 : | edgomez | 1.37 | level += max_level[intra][*last][*run]; |
1178 : | else /* second escape mode, run is offset */ | ||
1179 : | *run += max_run[intra][*last][level] + 1; | ||
1180 : | edgomez | 1.27 | |
1181 : | edgomez | 1.37 | return BitstreamGetBits(bs, 1) ? -level : level; |
1182 : | edgomez | 1.27 | } |
1183 : | edgomez | 1.37 | |
1184 : | edgomez | 1.34 | /* third escape mode - fixed length codes */ |
1185 : | edgomez | 1.27 | BitstreamSkip(bs, 2); |
1186 : | *last = BitstreamGetBits(bs, 1); | ||
1187 : | *run = BitstreamGetBits(bs, 6); | ||
1188 : | edgomez | 1.34 | BitstreamSkip(bs, 1); /* marker */ |
1189 : | edgomez | 1.27 | level = BitstreamGetBits(bs, 12); |
1190 : | edgomez | 1.34 | BitstreamSkip(bs, 1); /* marker */ |
1191 : | edgomez | 1.27 | |
1192 : | edgomez | 1.37 | return (level << 20) >> 20; |
1193 : | edgomez | 1.27 | |
1194 : | error: | ||
1195 : | *run = VLC_ERROR; | ||
1196 : | return 0; | ||
1197 : | } | ||
1198 : | |||
1199 : | edgomez | 1.17 | void |
1200 : | get_intra_block(Bitstream * bs, | ||
1201 : | int16_t * block, | ||
1202 : | int direction, | ||
1203 : | int coeff) | ||
1204 : | Isibaar | 1.1 | { |
1205 : | edgomez | 1.7 | |
1206 : | edgomez | 1.17 | const uint16_t *scan = scan_tables[direction]; |
1207 : | edgomez | 1.42 | int level, run, last; |
1208 : | Isibaar | 1.1 | |
1209 : | edgomez | 1.17 | do { |
1210 : | Isibaar | 1.1 | level = get_coeff(bs, &run, &last, 1, 0); |
1211 : | edgomez | 1.17 | if (run == -1) { |
1212 : | edgomez | 1.42 | DPRINTF(DPRINTF_ERROR,"fatal: invalid run"); |
1213 : | Isibaar | 1.1 | break; |
1214 : | } | ||
1215 : | coeff += run; | ||
1216 : | edgomez | 1.17 | block[scan[coeff]] = level; |
1217 : | suxen_drol | 1.20 | |
1218 : | DPRINTF(DPRINTF_COEFF,"block[%i] %i", scan[coeff], level); | ||
1219 : | edgomez | 1.42 | //DPRINTF(DPRINTF_COEFF,"block[%i] %i %08x", scan[coeff], level, BitstreamShowBits(bs, 32)); |
1220 : | suxen_drol | 1.20 | |
1221 : | suxen_drol | 1.36 | if (level < -2047 || level > 2047) { |
1222 : | edgomez | 1.42 | DPRINTF(DPRINTF_ERROR,"warning: intra_overflow %i", level); |
1223 : | Isibaar | 1.1 | } |
1224 : | coeff++; | ||
1225 : | } while (!last); | ||
1226 : | edgomez | 1.7 | |
1227 : | Isibaar | 1.1 | } |
1228 : | |||
1229 : | edgomez | 1.17 | void |
1230 : | get_inter_block(Bitstream * bs, | ||
1231 : | edgomez | 1.42 | int16_t * block, |
1232 : | int direction) | ||
1233 : | Isibaar | 1.1 | { |
1234 : | edgomez | 1.7 | |
1235 : | edgomez | 1.42 | const uint16_t *scan = scan_tables[direction]; |
1236 : | Isibaar | 1.1 | int p; |
1237 : | int level; | ||
1238 : | int run; | ||
1239 : | int last; | ||
1240 : | |||
1241 : | p = 0; | ||
1242 : | edgomez | 1.17 | do { |
1243 : | Isibaar | 1.1 | level = get_coeff(bs, &run, &last, 0, 0); |
1244 : | edgomez | 1.17 | if (run == -1) { |
1245 : | edgomez | 1.42 | DPRINTF(DPRINTF_ERROR,"fatal: invalid run"); |
1246 : | Isibaar | 1.1 | break; |
1247 : | } | ||
1248 : | p += run; | ||
1249 : | chenm001 | 1.16 | |
1250 : | edgomez | 1.17 | block[scan[p]] = level; |
1251 : | suxen_drol | 1.20 | |
1252 : | DPRINTF(DPRINTF_COEFF,"block[%i] %i", scan[p], level); | ||
1253 : | edgomez | 1.42 | // DPRINTF(DPRINTF_COEFF,"block[%i] %i %08x", scan[p], level, BitstreamShowBits(bs, 32)); |
1254 : | suxen_drol | 1.20 | |
1255 : | suxen_drol | 1.36 | if (level < -2047 || level > 2047) { |
1256 : | edgomez | 1.42 | DPRINTF(DPRINTF_ERROR,"warning: inter overflow %i", level); |
1257 : | Isibaar | 1.1 | } |
1258 : | p++; | ||
1259 : | } while (!last); | ||
1260 : | edgomez | 1.7 | |
1261 : | Isibaar | 1.1 | } |
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