mirror of
https://github.com/mpv-player/mpv
synced 2024-12-18 12:55:16 +00:00
7041d8cd37
Note that we don't try to be clever about detecting the files as subtitles: we just check the file extension. We could go all the way and check the files by opening them with a demuxer, but that would probably do more bad than good.
263 lines
8.0 KiB
C
263 lines
8.0 KiB
C
#include <dirent.h>
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#include <string.h>
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#include <stdlib.h>
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#include <ctype.h>
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#include <assert.h>
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#include "osdep/io.h"
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#include "common/global.h"
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#include "common/msg.h"
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#include "options/options.h"
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#include "options/path.h"
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#include "common/common.h"
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#include "sub/find_subfiles.h"
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static const char *sub_exts[] = {"utf", "utf8", "utf-8", "idx", "sub", "srt",
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"smi", "rt", "txt", "ssa", "aqt", "jss",
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"js", "ass", NULL};
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static bool is_sub_ext(bstr ext)
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{
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for (int n = 0; sub_exts[n]; n++) {
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if (bstrcasecmp(bstr0(sub_exts[n]), ext) == 0)
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return true;
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}
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return false;
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}
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static struct bstr strip_ext(struct bstr str)
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{
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int dotpos = bstrrchr(str, '.');
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if (dotpos < 0)
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return str;
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return (struct bstr){str.start, dotpos};
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}
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static struct bstr get_ext(struct bstr s)
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{
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int dotpos = bstrrchr(s, '.');
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if (dotpos < 0)
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return (struct bstr){NULL, 0};
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return bstr_splice(s, dotpos + 1, s.len);
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}
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bool mp_might_be_subtitle_file(const char *filename)
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{
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return is_sub_ext(get_ext(bstr0(filename)));
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}
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static int compare_sub_filename(const void *a, const void *b)
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{
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const struct subfn *s1 = a;
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const struct subfn *s2 = b;
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return strcoll(s1->fname, s2->fname);
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}
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static int compare_sub_priority(const void *a, const void *b)
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{
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const struct subfn *s1 = a;
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const struct subfn *s2 = b;
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if (s1->priority > s2->priority)
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return -1;
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if (s1->priority < s2->priority)
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return 1;
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return strcoll(s1->fname, s2->fname);
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}
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static struct bstr guess_lang_from_filename(struct bstr name)
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{
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if (name.len < 2)
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return (struct bstr){NULL, 0};
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int n = 0;
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int i = name.len - 1;
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if (name.start[i] == ')' || name.start[i] == ']')
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i--;
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while (i >= 0 && isalpha(name.start[i])) {
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n++;
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if (n > 3)
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return (struct bstr){NULL, 0};
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i--;
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}
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if (n < 2)
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return (struct bstr){NULL, 0};
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return (struct bstr){name.start + i + 1, n};
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}
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/**
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* @brief Append all the subtitles in the given path matching fname
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* @param opts MPlayer options
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* @param slist pointer to the subtitles list tallocated
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* @param nsub pointer to the number of subtitles
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* @param path Look for subtitles in this directory
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* @param fname Subtitle filename (pattern)
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* @param limit_fuzziness Ignore flag when sub_fuziness == 2
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*/
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static void append_dir_subtitles(struct mpv_global *global,
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struct subfn **slist, int *nsub,
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struct bstr path, const char *fname,
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int limit_fuzziness)
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{
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void *tmpmem = talloc_new(NULL);
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struct MPOpts *opts = global->opts;
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struct mp_log *log = mp_log_new(tmpmem, global->log, "find_subfiles");
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if (mp_is_url(bstr0(fname)))
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goto out;
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struct bstr f_fname = bstr0(mp_basename(fname));
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struct bstr f_fname_noext = bstrdup(tmpmem, strip_ext(f_fname));
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bstr_lower(f_fname_noext);
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struct bstr f_fname_trim = bstr_strip(f_fname_noext);
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// 0 = nothing
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// 1 = any subtitle file
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// 2 = any sub file containing movie name
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// 3 = sub file containing movie name and the lang extension
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char *path0 = bstrdup0(tmpmem, path);
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DIR *d = opendir(path0);
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if (!d)
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goto out;
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mp_verbose(log, "Load subtitles in %.*s\n", BSTR_P(path));
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struct dirent *de;
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while ((de = readdir(d))) {
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struct bstr dename = bstr0(de->d_name);
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void *tmpmem2 = talloc_new(tmpmem);
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// retrieve various parts of the filename
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struct bstr tmp_fname_noext = bstrdup(tmpmem2, strip_ext(dename));
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bstr_lower(tmp_fname_noext);
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struct bstr tmp_fname_ext = get_ext(dename);
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struct bstr tmp_fname_trim = bstr_strip(tmp_fname_noext);
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// does it end with a subtitle extension?
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if (!is_sub_ext(tmp_fname_ext))
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goto next_sub;
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// we have a (likely) subtitle file
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int prio = 0;
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char *found_lang = NULL;
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if (opts->sub_lang) {
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if (bstr_startswith(tmp_fname_trim, f_fname_trim)) {
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struct bstr lang = guess_lang_from_filename(tmp_fname_trim);
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if (lang.len) {
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for (int n = 0; opts->sub_lang[n]; n++) {
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if (bstr_startswith0(lang, opts->sub_lang[n])) {
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prio = 4; // matches the movie name + lang extension
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found_lang = opts->sub_lang[n];
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break;
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}
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}
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}
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}
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}
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if (!prio && bstrcmp(tmp_fname_trim, f_fname_trim) == 0)
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prio = 3; // matches the movie name
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if (!prio && bstr_find(tmp_fname_trim, f_fname_trim) >= 0
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&& opts->sub_match_fuzziness >= 1)
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prio = 2; // contains the movie name
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if (!prio) {
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// doesn't contain the movie name
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// don't try in the mplayer subtitle directory
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if (!limit_fuzziness && opts->sub_match_fuzziness >= 2) {
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prio = 1;
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}
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}
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mp_dbg(log, "Potential sub file: \"%s\" Priority: %d\n", de->d_name, prio);
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if (prio) {
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prio += prio;
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char *subpath = mp_path_join(*slist, path, dename);
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if (mp_path_exists(subpath)) {
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MP_GROW_ARRAY(*slist, *nsub);
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struct subfn *sub = *slist + (*nsub)++;
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// annoying and redundant
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if (strncmp(subpath, "./", 2) == 0)
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subpath += 2;
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sub->priority = prio;
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sub->fname = subpath;
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sub->lang = found_lang;
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} else
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talloc_free(subpath);
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}
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next_sub:
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talloc_free(tmpmem2);
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}
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closedir(d);
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out:
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talloc_free(tmpmem);
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}
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static bool case_endswith(const char *s, const char *end)
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{
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size_t len = strlen(s);
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size_t elen = strlen(end);
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return len >= elen && strcasecmp(s + len - elen, end) == 0;
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}
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// Drop .sub file if .idx file exists.
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// Assumes slist is sorted by compare_sub_filename.
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static void filter_subidx(struct subfn **slist, int *nsub)
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{
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const char *prev = NULL;
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for (int n = 0; n < *nsub; n++) {
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const char *fname = (*slist)[n].fname;
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if (case_endswith(fname, ".idx")) {
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prev = fname;
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} else if (case_endswith(fname, ".sub")) {
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if (prev && strncmp(prev, fname, strlen(fname) - 4) == 0)
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(*slist)[n].priority = -1;
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}
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}
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for (int n = *nsub - 1; n >= 0; n--) {
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if ((*slist)[n].priority < 0)
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MP_TARRAY_REMOVE_AT(*slist, *nsub, n);
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}
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}
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// Return a list of subtitles found, sorted by priority.
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// Last element is terminated with a fname==NULL entry.
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struct subfn *find_text_subtitles(struct mpv_global *global, const char *fname)
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{
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struct MPOpts *opts = global->opts;
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struct subfn *slist = talloc_array_ptrtype(NULL, slist, 1);
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int n = 0;
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// Load subtitles from current media directory
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append_dir_subtitles(global, &slist, &n, mp_dirname(fname), fname, 0);
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// Load subtitles in dirs specified by sub-paths option
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if (opts->sub_paths) {
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for (int i = 0; opts->sub_paths[i]; i++) {
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char *path = mp_path_join(slist, mp_dirname(fname),
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bstr0(opts->sub_paths[i]));
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append_dir_subtitles(global, &slist, &n, bstr0(path), fname, 0);
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}
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}
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// Load subtitles in ~/.mpv/sub limiting sub fuzziness
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char *mp_subdir = mp_find_user_config_file(NULL, global, "sub/");
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if (mp_subdir)
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append_dir_subtitles(global, &slist, &n, bstr0(mp_subdir), fname, 1);
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talloc_free(mp_subdir);
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// Sort by name for filter_subidx()
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qsort(slist, n, sizeof(*slist), compare_sub_filename);
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filter_subidx(&slist, &n);
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// Sort subs by priority and append them
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qsort(slist, n, sizeof(*slist), compare_sub_priority);
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struct subfn z = {0};
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MP_TARRAY_APPEND(NULL, slist, n, z);
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return slist;
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}
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