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Simple image search... under construction
[libucw.git] / images / image-idx.c
1 #define LOCAL_DEBUG
2
3 #include "sherlock/sherlock.h"
4 #include "lib/mempool.h"
5 #include "lib/conf.h"
6 #include "lib/fastbuf.h"
7 #include "lib/chartype.h"
8 #include "sherlock/object.h"
9 #include "lib/url.h"
10 #include "lib/unicode.h"
11 #include "sherlock/lizard-fb.h"
12 #include "sherlock/tagged-text.h"
13 #include "charset/charconv.h"
14 #include "charset/unicat.h"
15 #include "charset/fb-charconv.h"
16 #include "indexer/indexer.h"
17 #include "indexer/lexicon.h"
18 #include "indexer/params.h"
19 #include "utils/dumpconfig.h"
20 #include "lang/lang.h"
21 #include "lib/base224.h"
22 #include "lib/bbuf.h"
23
24 #include "images/images.h"
25
26 #include <stdlib.h>
27 #include <fcntl.h>
28 #include <string.h>
29
30 /* This should happen in gatherer or scanner */
31 UNUSED static void
32 generate_signatures(uns limit)
33 {
34   struct fastbuf *fb_cards = index_bopen("cards", O_RDONLY);
35   struct fastbuf *fb_card_attrs = index_bopen("card-attrs", O_RDONLY);
36   struct fastbuf *fb_signatures = index_bopen("image-sig", O_CREAT | O_WRONLY | O_TRUNC);
37   struct card_attr ca;
38   struct image_signature sig;
39   struct mempool *pool = mp_new(1 << 16);
40   struct buck2obj_buf *bob = buck2obj_alloc();
41   uns count = 0;
42
43   log(L_INFO, "Generating image signatures");
44   bputl(fb_signatures, 0);
45   compute_image_signature_prepare();
46
47   for (oid_t oid = 0; bread(fb_card_attrs, &ca, sizeof(ca)); oid++)
48     if ((uns)((ca.type_flags >> 4) - 8) < 4)
49       {
50         bsetpos(fb_cards, (sh_off_t)ca.card << CARD_POS_SHIFT);
51         uns buck_len = bgetl(fb_cards) - (LIZARD_COMPRESS_HEADER - 1);
52         uns buck_type = bgetc(fb_cards) + BUCKET_TYPE_PLAIN;
53         mp_flush(pool);
54         struct odes *obj = obj_read_bucket(bob, pool, buck_type, buck_len, fb_cards, NULL);
55         struct oattr *attr;
56         if (!obj)
57           die("Failed to read card");
58         if (attr = obj_find_attr(obj, 'N'))
59           {
60             DBG("Reading oid=%d url=%s", oid, obj_find_aval(obj_find_attr(obj, 'U' + OBJ_ATTR_SON)->son, 'U'));
61             bb_t buf;
62             uns buf_len = 0;
63             bb_init(&buf);
64             for (; attr; attr = attr->same)
65               {
66                 uns len = strlen(attr->val);
67                 bb_grow(&buf, buf_len + len);
68                 memcpy(buf.ptr + buf_len, attr->val, len);
69                 buf_len += len;
70               }
71             byte thumb[buf_len];
72             uns thumb_len = base224_decode(thumb, buf.ptr, buf_len);
73            
74             int err = compute_image_signature(thumb, thumb_len, &sig);
75             if (!err)
76               {
77                 bwrite(fb_signatures, &oid, sizeof(oid));
78                 bwrite(fb_signatures, &sig.vec, sizeof(struct image_vector));
79                 bputc(fb_signatures, sig.len);
80                 if (sig.len)
81                   bwrite(fb_signatures, sig.reg, sig.len * sizeof(struct image_region));
82                 count++;
83                 if (count >= limit)
84                   break;
85               }
86             else
87               DBG("Cannot create signature, error=%d", err);
88
89             bb_done(&buf);
90           }
91       }
92   brewind(fb_signatures);
93   bputl(fb_signatures, count);
94   DBG("%d signatures written", count);
95
96   compute_image_signature_finish();
97   buck2obj_free(bob);
98   mp_delete(pool);
99   bclose(fb_cards);
100   bclose(fb_card_attrs);
101   bclose(fb_signatures);
102 }
103
104 UNUSED static void
105 generate_random_signatures(uns count)
106 {
107   log(L_INFO, "Generating %d random signatures", count);
108   struct fastbuf *fb_signatures = index_bopen("image-sig", O_CREAT | O_WRONLY | O_TRUNC);
109   bputl(fb_signatures, count);
110   for (uns i = 0; i < count; i++)
111     {
112       oid_t oid = i;
113       struct image_vector vec;
114       for (uns j = 0; j < IMAGE_VEC_K; j++)
115         vec.f[j] = random_max(256); 
116       bwrite(fb_signatures, &oid, sizeof(oid));
117       bwrite(fb_signatures, &vec, sizeof(vec));
118       bputc(fb_signatures, 0);
119     }
120   bclose(fb_signatures); 
121 }
122
123 struct signature_record {
124   oid_t oid;
125   struct image_vector vec;
126 };
127
128 #define ASORT_PREFIX(x) build_search_tree_##x
129 #define ASORT_KEY_TYPE struct signature_record *
130 #define ASORT_ELT(i) rec[i]
131 #define ASORT_LT(x,y) x->vec.f[dim] < y->vec.f[dim]
132 #define ASORT_EXTRA_ARGS , uns dim, struct signature_record **rec
133 #include "lib/arraysort.h"
134
135 #if 0
136 #define DBG_KD(x...) DBG(x)
137 #else
138 #define DBG_KD(x...) do{}while(0)
139 #endif
140
141 static void
142 build_search_tree(void)
143 {
144   log(L_INFO, "Building KD-tree");
145
146   struct fastbuf *fb_signatures = index_bopen("image-sig", O_RDONLY);
147   struct image_tree tree;
148   tree.count = bgetl(fb_signatures);
149   ASSERT(tree.count < 0x80000000);
150   if (!tree.count)
151     {
152       /* FIXME */
153       bclose(fb_signatures);
154       die("There are no signatures");
155     }
156   else
157     {
158       DBG("Reading %d signatures", tree.count);
159       struct signature_record *records = xmalloc(tree.count * sizeof(struct signature_record));
160       struct signature_record **precords = xmalloc(tree.count * sizeof(void *));
161       for (uns i = 0; i < tree.count; i++)
162         {
163           bread(fb_signatures, &records[i].oid, sizeof(oid_t));
164           bread(fb_signatures, &records[i].vec, sizeof(struct image_vector));
165           uns len = bgetc(fb_signatures);
166           bskip(fb_signatures, len * sizeof(struct image_region));
167           precords[i] = records + i;
168           if (likely(i))
169             for (uns j = 0; j < IMAGE_VEC_K; j++)
170               {
171                 tree.bbox.vec[0].f[j] = MIN(tree.bbox.vec[0].f[j], records[i].vec.f[j]);
172                 tree.bbox.vec[1].f[j] = MAX(tree.bbox.vec[1].f[j], records[i].vec.f[j]);
173               }
174           else
175             tree.bbox.vec[0] = tree.bbox.vec[1] = records[0].vec;
176         }
177       bclose(fb_signatures);
178       
179       for (tree.depth = 1; (uns)(2 << tree.depth) < tree.count; tree.depth++);
180       DBG("depth=%d nodes=%d bbox=[(%s), (%s)]", tree.depth, 1 << tree.depth, 
181           stk_print_image_vector(tree.bbox.vec + 0), stk_print_image_vector(tree.bbox.vec + 1));
182       uns leaves_index = 1 << (tree.depth - 1);
183       tree.nodes = xmalloc_zero((1 << tree.depth) * sizeof(struct image_node));
184       tree.leaves = xmalloc_zero(tree.count * sizeof(struct image_leaf));
185      
186       /* Initialize recursion */
187       struct stk {
188         struct image_bbox bbox;
189         uns index, count;
190         struct signature_record **start;
191       } stk_top[32], *stk = stk_top + 1;
192       stk->index = 1;
193       stk->start = precords;
194       stk->count = tree.count;
195       stk->bbox.vec[0] = tree.bbox.vec[0];
196       for (uns i = 0; i < IMAGE_VEC_K; i++)
197         stk->bbox.vec[1].f[i] = tree.bbox.vec[1].f[i] - tree.bbox.vec[0].f[i];
198       uns entry_index = 0;
199     
200       /* Main loop */
201       while (stk != stk_top)
202         {
203           DBG_KD("Main loop... depth=%d index=%d count=%d, start=%d, min=%s dif=%s",
204               stk - stk_top, stk->index, stk->count, stk->start - precords,
205               stk_print_image_vector(stk->bbox.vec + 0), stk_print_image_vector(stk->bbox.vec + 1));
206           ASSERT(stk->count);
207           
208           /* Create leaf node */
209           if (stk->index >= leaves_index || stk->count < 2)
210             {
211               tree.nodes[stk->index].val = IMAGE_NODE_LEAF | entry_index;
212               for (; stk->count--; stk->start++)
213                 {
214                   struct image_leaf *leaf = &tree.leaves[entry_index++];
215                   struct signature_record *record = *stk->start;
216                   leaf->oid = record->oid;
217                   leaf->flags = 0;
218                   for (uns i = IMAGE_VEC_K; i--; )
219                     {
220                       uns bits = IMAGE_LEAF_BITS(i);
221                       leaf->flags <<= bits;
222                       if (stk->bbox.vec[1].f[i])
223                         {
224                           uns value =
225                             (record->vec.f[i] - stk->bbox.vec[0].f[i]) * 
226                             ((1 << bits) - 1) / stk->bbox.vec[1].f[i];
227                           ASSERT(value < (uns)(1 << bits));
228                           leaf->flags |= value;
229                         }
230                     }
231                   if (!stk->count)
232                     leaf->flags |= IMAGE_LEAF_LAST; 
233                   DBG_KD("Creating leaf node; oid=%d vec=(%s) flags=0x%08x", 
234                       leaf->oid, stk_print_image_vector(&record->vec), leaf->flags);
235                 }
236               stk--;
237             }
238          
239           /* Create internal node */
240           else
241             {
242               /* Select dimension to splis */
243               uns dim = 0;
244               for (uns i = 1; i < IMAGE_VEC_K; i++)
245                 if (stk->bbox.vec[1].f[i] > stk->bbox.vec[1].f[dim])
246                   dim = i;
247
248               /* Sort... FIXME: we only need the median */
249               build_search_tree_sort(stk->count, dim, stk->start);
250               
251               /* Split in the middle */
252               uns index = stk->index;
253               stk[1].index = stk[0].index * 2;
254               stk[0].index = stk[1].index + 1;
255               stk[1].count = stk[0].count >> 1;
256               stk[0].count -= stk[1].count;
257               stk[1].start = stk[0].start;
258               stk[0].start += stk[1].count;
259
260               /* Choose split value */
261               uns lval = stk->start[-1]->vec.f[dim];
262               uns rval = stk->start[0]->vec.f[dim];
263               uns pivot = stk->bbox.vec[0].f[dim] + (stk->bbox.vec[1].f[dim] >> 1);
264               if (pivot <= lval)
265                 pivot = lval;
266               else if (pivot >= rval)
267                 pivot = rval;
268
269               DBG_KD("Created internal node; dim=%d pivot=%d", dim, pivot);
270
271               /* Split the box */
272               stk[1].bbox = stk[0].bbox;
273               stk[1].bbox.vec[1].f[dim] = pivot - stk[0].bbox.vec[0].f[dim];
274               stk[0].bbox.vec[0].f[dim] += stk[1].bbox.vec[1].f[dim];
275               stk[0].bbox.vec[1].f[dim] -= stk[1].bbox.vec[1].f[dim];
276
277               /* Fill the node structure */
278               tree.nodes[index].val = dim + (pivot << 8);
279               stk++;
280             }
281         }
282
283       DBG("Tree constructed, saving...");
284
285       struct fastbuf *fb_tree = index_bopen("image-tree", O_CREAT | O_WRONLY | O_TRUNC);
286       bputl(fb_tree, tree.count);
287       bputl(fb_tree, tree.depth);
288       bwrite(fb_tree, &tree.bbox, sizeof(struct image_bbox));
289       bwrite(fb_tree, tree.nodes + 1, ((1 << tree.depth) - 1) * sizeof(struct image_node));
290       bwrite(fb_tree, tree.leaves, tree.count * sizeof(struct image_leaf));
291       bclose(fb_tree);
292
293       xfree(tree.leaves);
294       xfree(tree.nodes);
295       xfree(precords);
296       xfree(records);
297     }
298 }
299
300
301 static char *shortopts = CF_SHORT_OPTS "";
302 static struct option longopts[] =
303 {
304   CF_LONG_OPTS
305   { NULL, 0, 0, 0 }
306 };
307
308 static char *help = "\
309 Usage: image-indexer [<options>]\n\
310 \n\
311 Options:\n" CF_USAGE;
312
313 static void NONRET
314 usage(byte *msg)
315 {
316   if (msg)
317   {
318     fputs(msg, stderr);
319     fputc('\n', stderr);
320   }
321   fputs(help, stderr);
322   exit(1);
323 }
324
325   
326 int
327 main(int argc UNUSED, char **argv)
328 {
329   int opt;
330   
331   log_init(argv[0]);
332   while ((opt = cf_getopt(argc, argv, shortopts, longopts, NULL)) >= 0)
333     switch (opt)
334     {
335       default:
336       usage("Invalid option");
337     }
338   if (optind != argc)
339     usage("Invalid usage");
340
341   generate_signatures(~0U);
342   //generate_random_signatures(1000000);
343   build_search_tree();
344   
345   return 0;
346 }