mirror of
https://github.com/mpv-player/mpv
synced 2024-12-23 23:32:26 +00:00
50991fac81
If used with fuzzy matching, the player tends to pick up random text files, sometimes with interesting results. The most interesting interaction is when the user uses --log-file=something.txt, and mpv tries to open its own log file. It essentially "freezes" during probing, because every time it reads from it, it will write some more data, which in turn will cause more data to be read - until the 2MB max. probing size is slowly reached. This is not even an obscure corner case, but happened to multiple users. The .txt extension has been considered a subtitle extension ever since the code was added to MPlayer's subreader.c, but I'm not seeing many actual subtitle files with this extension, so just get rid of it.
295 lines
9.3 KiB
C
295 lines
9.3 KiB
C
#include <dirent.h>
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#include <string.h>
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#include <strings.h>
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#include <stdlib.h>
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#include <assert.h>
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#include "osdep/io.h"
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#include "common/common.h"
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#include "common/global.h"
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#include "common/msg.h"
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#include "misc/ctype.h"
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#include "misc/charset_conv.h"
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#include "options/options.h"
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#include "options/path.h"
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#include "external_files.h"
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static const char *const sub_exts[] = {"utf", "utf8", "utf-8", "idx", "sub", "srt",
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"smi", "rt", "ssa", "aqt", "jss",
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"js", "ass", "mks", "vtt", "sup", "scc",
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NULL};
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static const char *const audio_exts[] = {"mp3", "aac", "mka", "dts", "flac",
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"ogg", "m4a", "ac3", "opus", "wav",
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"wv",
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NULL};
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static bool test_ext_list(bstr ext, const char *const *list)
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{
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for (int n = 0; list[n]; n++) {
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if (bstrcasecmp(bstr0(list[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 int test_ext(bstr ext)
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{
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if (test_ext_list(ext, sub_exts))
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return STREAM_SUB;
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if (test_ext_list(ext, audio_exts))
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return STREAM_AUDIO;
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return -1;
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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 test_ext(bstr_get_ext(bstr0(filename))) == STREAM_SUB;
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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 && mp_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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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, int limit_type)
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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_files");
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if (mp_is_url(bstr0(fname)))
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goto out;
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struct bstr f_fbname = bstr0(mp_basename(fname));
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struct bstr f_fname = mp_iconv_to_utf8(log, f_fbname,
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"UTF-8-MAC", MP_NO_LATIN1_FALLBACK);
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struct bstr f_fname_noext = bstrdup(tmpmem, bstr_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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if (f_fbname.start != f_fname.start)
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talloc_steal(tmpmem, f_fname.start);
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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, "Loading external files 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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void *tmpmem2 = talloc_new(tmpmem);
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struct bstr den = bstr0(de->d_name);
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struct bstr dename = mp_iconv_to_utf8(log, den,
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"UTF-8-MAC", MP_NO_LATIN1_FALLBACK);
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// retrieve various parts of the filename
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struct bstr tmp_fname_noext = bstrdup(tmpmem2, bstr_strip_ext(dename));
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bstr_lower(tmp_fname_noext);
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struct bstr tmp_fname_ext = bstr_get_ext(dename);
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struct bstr tmp_fname_trim = bstr_strip(tmp_fname_noext);
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if (den.start != dename.start)
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talloc_steal(tmpmem2, dename.start);
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// check what it is (most likely)
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int type = test_ext(tmp_fname_ext);
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char **langs = NULL;
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int fuzz = -1;
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switch (type) {
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case STREAM_SUB:
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langs = opts->stream_lang[type];
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fuzz = opts->sub_auto;
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break;
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case STREAM_AUDIO:
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langs = opts->stream_lang[type];
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fuzz = opts->audiofile_auto;
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break;
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}
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if (fuzz < 0 || (limit_type >= 0 && limit_type != type))
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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 (langs) {
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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; langs[n]; n++) {
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if (bstr_startswith0(lang, langs[n])) {
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prio = 4; // matches the movie name + lang extension
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found_lang = langs[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 && fuzz >= 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 && fuzz >= 2) {
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prio = 1;
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}
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}
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mp_dbg(log, "Potential external file: \"%s\" Priority: %d\n",
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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_bstr(*slist, path, dename);
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if (mp_path_exists(subpath)) {
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MP_TARRAY_GROW(NULL, *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->type = type;
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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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static void load_paths(struct mpv_global *global, struct subfn **slist,
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int *nsubs, const char *fname, char **paths,
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char *cfg_path, int type)
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{
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for (int i = 0; paths && paths[i]; i++) {
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char *path = mp_path_join_bstr(*slist, mp_dirname(fname),
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bstr0(paths[i]));
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append_dir_subtitles(global, slist, nsubs, bstr0(path), fname, 0, type);
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}
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// Load subtitles in ~/.mpv/sub (or similar) limiting sub fuzziness
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char *mp_subdir = mp_find_config_file(NULL, global, cfg_path);
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if (mp_subdir) {
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append_dir_subtitles(global, slist, nsubs, bstr0(mp_subdir), fname, 1,
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type);
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}
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talloc_free(mp_subdir);
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}
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// Return a list of subtitles and audio files found, sorted by priority.
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// Last element is terminated with a fname==NULL entry.
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struct subfn *find_external_files(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, -1);
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// Load subtitles in dirs specified by sub-paths option
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if (opts->sub_auto >= 0) {
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load_paths(global, &slist, &n, fname, opts->sub_paths, "sub/",
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STREAM_SUB);
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}
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if (opts->audiofile_auto >= 0) {
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load_paths(global, &slist, &n, fname, opts->audiofile_paths, "audio/",
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STREAM_AUDIO);
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}
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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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