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#include <dirent.h>
#include <string.h>
#include <stdlib.h>
#include <ctype.h>
#include <assert.h>
#include "osdep/io.h"
#include "mpvcore/mp_msg.h"
#include "mpvcore/options.h"
#include "mpvcore/path.h"
#include "mpvcore/mp_common.h"
#include "sub/find_subfiles.h"
#include "sub/sub.h"
static struct bstr strip_ext(struct bstr str)
{
int dotpos = bstrrchr(str, '.');
if (dotpos < 0)
return str;
return (struct bstr){str.start, dotpos};
}
static struct bstr get_ext(struct bstr s)
{
int dotpos = bstrrchr(s, '.');
if (dotpos < 0)
return (struct bstr){NULL, 0};
return bstr_splice(s, dotpos + 1, s.len);
}
struct subfn {
int priority;
char *fname;
};
static int compare_sub_priority(const void *a, const void *b)
{
const struct subfn *s1 = a;
const struct subfn *s2 = b;
if (s1->priority > s2->priority)
return -1;
if (s1->priority < s2->priority)
return 1;
return strcoll(s1->fname, s2->fname);
}
static struct bstr guess_lang_from_filename(struct bstr name)
{
if (name.len < 2)
return (struct bstr){NULL, 0};
int n = 0;
int i = name.len - 1;
if (name.start[i] == ')' || name.start[i] == ']')
i--;
while (i >= 0 && isalpha(name.start[i])) {
n++;
if (n > 3)
return (struct bstr){NULL, 0};
i--;
}
if (n < 2)
return (struct bstr){NULL, 0};
return (struct bstr){name.start + i + 1, n};
}
struct sub_list {
struct subfn subs[MAX_SUBTITLE_FILES];
void *ctx;
};
/**
* @brief Append all the subtitles in the given path matching fname
* @param opts MPlayer options
* @param slist pointer to the subtitles list tallocated
* @param nsub pointer to the number of subtitles
* @param path Look for subtitles in this directory
* @param fname Subtitle filename (pattern)
* @param limit_fuzziness Ignore flag when sub_fuziness == 2
*/
static void append_dir_subtitles(struct MPOpts *opts,
struct subfn **slist, int *nsub,
struct bstr path, const char *fname,
int limit_fuzziness)
{
char *sub_exts[] = {"utf", "utf8", "utf-8", "idx", "sub", "srt", "smi", "rt", "txt", "ssa", "aqt", "jss", "js", "ass", NULL};
void *tmpmem = talloc_new(NULL);
FILE *f;
assert(strlen(fname) < 1e6);
struct bstr f_fname = bstr0(mp_basename(fname));
struct bstr f_fname_noext = bstrdup(tmpmem, strip_ext(f_fname));
bstr_lower(f_fname_noext);
struct bstr f_fname_trim = bstr_strip(f_fname_noext);
// 0 = nothing
// 1 = any subtitle file
// 2 = any sub file containing movie name
// 3 = sub file containing movie name and the lang extension
char *path0 = bstrdup0(tmpmem, path);
DIR *d = opendir(path0);
if (!d)
goto out;
mp_msg(MSGT_SUBREADER, MSGL_V, "Load subtitles in %.*s\n", BSTR_P(path));
struct dirent *de;
while ((de = readdir(d))) {
struct bstr dename = bstr0(de->d_name);
void *tmpmem2 = talloc_new(tmpmem);
// retrieve various parts of the filename
struct bstr tmp_fname_noext = bstrdup(tmpmem2, strip_ext(dename));
bstr_lower(tmp_fname_noext);
struct bstr tmp_fname_ext = get_ext(dename);
struct bstr tmp_fname_trim = bstr_strip(tmp_fname_noext);
// does it end with a subtitle extension?
#ifdef CONFIG_ICONV
#ifdef CONFIG_ENCA
int i = (opts->sub_cp && strncasecmp(opts->sub_cp, "enca", 4) != 0) ? 3 : 0;
#else
int i = opts->sub_cp ? 3 : 0;
#endif
#else
int i = 0;
#endif
while (1) {
if (!sub_exts[i])
goto next_sub;
if (bstrcasecmp(bstr0(sub_exts[i]), tmp_fname_ext) == 0)
break;
i++;
}
// we have a (likely) subtitle file
int prio = 0;
if (opts->sub_lang) {
if (bstr_startswith(tmp_fname_trim, f_fname_trim)) {
struct bstr lang = guess_lang_from_filename(tmp_fname_trim);
if (lang.len) {
for (int n = 0; opts->sub_lang[n]; n++) {
if (bstr_startswith(lang,
bstr0(opts->sub_lang[n]))) {
prio = 4; // matches the movie name + lang extension
break;
}
}
}
}
}
if (!prio && bstrcmp(tmp_fname_trim, f_fname_trim) == 0)
prio = 3; // matches the movie name
if (!prio && bstr_find(tmp_fname_trim, f_fname_trim) >= 0
&& opts->sub_match_fuzziness >= 1)
prio = 2; // contains the movie name
if (!prio) {
// doesn't contain the movie name
// don't try in the mplayer subtitle directory
if (!limit_fuzziness && opts->sub_match_fuzziness >= 2) {
prio = 1;
}
}
mp_msg(MSGT_SUBREADER, MSGL_DBG2, "Potential sub file: "
"\"%s\" Priority: %d\n", de->d_name, prio);
if (prio) {
prio += prio;
#ifdef CONFIG_ICONV
if (i < 4) // prefer UTF-8 coded, or idx over sub (vobsubs)
prio++;
#endif
char *subpath = mp_path_join(*slist, path, dename);
if ((f = fopen(subpath, "rt"))) {
MP_GROW_ARRAY(*slist, *nsub);
struct subfn *sub = *slist + (*nsub)++;
fclose(f);
sub->priority = prio;
sub->fname = subpath;
} else
talloc_free(subpath);
}
next_sub:
talloc_free(tmpmem2);
}
closedir(d);
out:
talloc_free(tmpmem);
}
char **find_text_subtitles(struct MPOpts *opts, const char *fname)
{
char **subnames = NULL;
struct subfn *slist = talloc_array_ptrtype(NULL, slist, 1);
int n = 0;
// Load subtitles from current media directory
append_dir_subtitles(opts, &slist, &n, mp_dirname(fname), fname, 0);
// Load subtitles in dirs specified by sub-paths option
if (opts->sub_paths) {
for (int i = 0; opts->sub_paths[i]; i++) {
char *path = mp_path_join(slist, mp_dirname(fname),
bstr0(opts->sub_paths[i]));
append_dir_subtitles(opts, &slist, &n, bstr0(path), fname, 0);
}
}
// Load subtitles in ~/.mplayer/sub limiting sub fuzziness
char *mp_subdir = mp_find_user_config_file("sub/");
if (mp_subdir)
append_dir_subtitles(opts, &slist, &n, bstr0(mp_subdir), fname, 1);
talloc_free(mp_subdir);
// Sort subs by priority and append them
qsort(slist, n, sizeof(*slist), compare_sub_priority);
subnames = talloc_array_ptrtype(NULL, subnames, n);
for (int i = 0; i < n; i++)
subnames[i] = talloc_strdup(subnames, slist[i].fname);
talloc_free(slist);
return subnames;
}
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