int nearest_neighbour(User *user, User ** set, int langs)
{
int i, k;
double vote;
Repo *repo, *candidates[WATCH_SIZE];
Match *match;
int votes = 0;
int candidate_count;
int matches;
if(langs) get_langs(user);
/* Each user in the set */
for(i = 0; i < stats.filtered_user_count; i++) {
if(user == set[i]) continue;
matches = candidate_count = 0;
/* Get number of matches, and store the rest in candidates[] */
for(k = 0; k < set[i]->watch_count; k++) {
repo = set[i]->watch[k];
if(find(repo, user->watch, user->watch_count)) matches++;
else candidates[candidate_count++] = repo;
}
/* If the watch-list is similar enough (lots of matches) */
if(matches > (user->watch_count * REPO_MATCH_TRESHOLD)) {
vote = normalize(matches, set[i]->watch_count, 100);
/* Go through candidates, and add them to recommendations */
for(k = 0; k < candidate_count; k++) {
repo = candidates[k];
if(langs) vote += match_langs(user->langs, repo->langs, user->lang_count, repo->lang_count);
/* repo is already in recommendation list, add a vote */
if(match = find_match(repo, user->recommend, votes)) match->weight += vote;
else {
user->recommend[votes].repo = repo;
user->recommend[votes++].weight = vote
+ normalize(repo->watchers, stats.max_watchers, 1);
}
}
}
}
return votes;
}
int bluray_id_from_lang(stream_t *s, enum stream_ctrl_type type, const char *lang)
{
struct bluray_priv_s *b = s->priv;
const BLURAY_STREAM_INFO *si;
int count;
BLURAY_TITLE_INFO *ti = get_langs(b, type, &si, &count);
while (count-- > 0) {
if (strstr(si->lang, lang)) {
bd_free_title_info(ti);
return si->pid;
}
si++;
}
if (ti)
bd_free_title_info(ti);
return -1;
}
static int bluray_stream_control(stream_t *s, int cmd, void *arg)
{
struct bluray_priv_s *b = s->priv;
switch (cmd) {
case STREAM_CTRL_GET_NUM_CHAPTERS: {
BLURAY_TITLE_INFO *ti;
ti = bd_get_title_info(b->bd, b->current_title, b->current_angle);
if (!ti)
return STREAM_UNSUPPORTED;
*((unsigned int *) arg) = ti->chapter_count;
bd_free_title_info(ti);
return 1;
}
case STREAM_CTRL_GET_CURRENT_TITLE: {
*((unsigned int *) arg) = b->current_title;
return 1;
}
case STREAM_CTRL_GET_CURRENT_CHAPTER: {
*((unsigned int *) arg) = bd_get_current_chapter(b->bd);
return 1;
}
case STREAM_CTRL_SEEK_TO_CHAPTER: {
BLURAY_TITLE_INFO *ti;
int chapter = *((unsigned int *) arg);
int64_t pos;
int r;
ti = bd_get_title_info(b->bd, b->current_title, b->current_angle);
if (!ti)
return STREAM_UNSUPPORTED;
if (chapter < 0 || chapter > ti->chapter_count) {
bd_free_title_info(ti);
return STREAM_UNSUPPORTED;
}
pos = bd_chapter_pos(b->bd, chapter);
r = bluray_stream_seek(s, pos);
bd_free_title_info(ti);
return r ? 1 : STREAM_UNSUPPORTED;
}
case STREAM_CTRL_GET_TIME_LENGTH: {
BLURAY_TITLE_INFO *ti = bd_get_title_info(b->bd, b->current_title, b->current_angle);
if (!ti)
return STREAM_UNSUPPORTED;
*(double *)arg = ti->duration / 90000.0;
return STREAM_OK;
}
case STREAM_CTRL_GET_SIZE:
*(uint64_t*)arg = bd_get_title_size(b->bd);
return STREAM_OK;
case STREAM_CTRL_GET_CURRENT_TIME:
*(double *)arg = bd_tell_time(b->bd) / 90000.0;
return STREAM_OK;
case STREAM_CTRL_SEEK_TO_TIME: {
int64_t res;
double target = *(double*)arg * 90000.0;
BLURAY_TITLE_INFO *ti = bd_get_title_info(b->bd, b->current_title, b->current_angle);
// clamp to ensure that out-of-bounds seeks do not simply do nothing.
target = FFMAX(target, 0);
if (ti && ti->duration > 1)
target = FFMIN(target, ti->duration - 1);
res = bd_seek_time(b->bd, target);
if (res < 0)
return STREAM_ERROR;
s->pos = res;
return 1;
}
case STREAM_CTRL_GET_NUM_ANGLES: {
BLURAY_TITLE_INFO *ti;
ti = bd_get_title_info(b->bd, b->current_title, b->current_angle);
if (!ti)
return STREAM_UNSUPPORTED;
*((int *) arg) = ti->angle_count;
bd_free_title_info(ti);
return 1;
}
case STREAM_CTRL_GET_ANGLE: {
*((int *) arg) = b->current_angle;
return 1;
}
case STREAM_CTRL_SET_ANGLE: {
BLURAY_TITLE_INFO *ti;
int angle = *((int *) arg);
ti = bd_get_title_info(b->bd, b->current_title, b->current_angle);
if (!ti)
return STREAM_UNSUPPORTED;
if (angle < 0 || angle > ti->angle_count) {
bd_free_title_info(ti);
return STREAM_UNSUPPORTED;
}
b->current_angle = angle;
bd_seamless_angle_change(b->bd, angle);
bd_free_title_info(ti);
return 1;
}
case STREAM_CTRL_GET_LANG: {
struct stream_lang_req *req = arg;
const BLURAY_STREAM_INFO *si;
int count;
BLURAY_TITLE_INFO *ti = get_langs(b, req->type, &si, &count);
while (count-- > 0) {
if (si->pid == req->id) {
memcpy(req->buf, si->lang, 4);
req->buf[4] = 0;
bd_free_title_info(ti);
return STREAM_OK;
}
si++;
}
if (ti)
bd_free_title_info(ti);
return STREAM_ERROR;
}
default:
break;
}
return STREAM_UNSUPPORTED;
}
