mpv/player/external_files.c

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/*
* This file is part of mpv.
*
* mpv is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* mpv is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with mpv. If not, see <http://www.gnu.org/licenses/>.
*/
#include <dirent.h>
#include <string.h>
#include <strings.h>
#include <stdlib.h>
#include <assert.h>
#include "osdep/io.h"
#include "common/common.h"
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#include "common/global.h"
#include "common/msg.h"
#include "misc/ctype.h"
#include "misc/charset_conv.h"
#include "options/options.h"
#include "options/path.h"
#include "external_files.h"
static const char *const sub_exts[] = {"utf", "utf8", "utf-8", "idx", "sub",
"srt", "rt", "ssa", "ass", "mks", "vtt",
"sup", "scc", "smi", "lrc", "pgs",
NULL};
static const char *const audio_exts[] = {"mp3", "aac", "mka", "dts", "flac",
"ogg", "m4a", "ac3", "opus", "wav",
"wv", "eac3", "thd",
NULL};
static const char *const image_exts[] = {"jpg", "jpeg", "png", "gif", "bmp",
"webp", "jxl", "tiff", "tif",
NULL};
// Stolen from: vlc/-/blob/master/modules/meta_engine/folder.c#L40
// sorted by priority (descending)
static const char *const cover_files[] = {
"AlbumArt.jpg",
"Album.jpg",
"cover.jpg",
"cover.png",
"front.jpg",
"front.png",
"AlbumArtSmall.jpg",
"Folder.jpg",
"Folder.png",
".folder.png",
"thumb.jpg",
"front.bmp",
"front.gif",
"cover.gif",
NULL
};
static bool test_ext_list(bstr ext, const char *const *list)
{
for (int n = 0; list[n]; n++) {
if (bstrcasecmp(bstr0(list[n]), ext) == 0)
return true;
}
return false;
}
static int test_ext(bstr ext)
{
if (test_ext_list(ext, sub_exts))
return STREAM_SUB;
if (test_ext_list(ext, audio_exts))
return STREAM_AUDIO;
if (test_ext_list(ext, image_exts))
return STREAM_VIDEO;
return -1;
}
static int test_cover_filename(bstr fname)
{
for (int n = 0; cover_files[n]; n++) {
if (bstrcasecmp(bstr0(cover_files[n]), fname) == 0) {
return MP_ARRAY_SIZE(cover_files) - n;
}
}
return 0;
}
bool mp_might_be_subtitle_file(const char *filename)
{
return test_ext(bstr_get_ext(bstr0(filename))) == STREAM_SUB;
}
static int compare_sub_filename(const void *a, const void *b)
{
const struct subfn *s1 = a;
const struct subfn *s2 = b;
return strcoll(s1->fname, s2->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, int *fn_start)
{
if (name.len < 2)
return (struct bstr){NULL, 0};
int n = 0;
int i = name.len - 1;
char thing = '.';
if (name.start[i] == ')') {
thing = '(';
i--;
}
if (name.start[i] == ']') {
thing = '[';
i--;
}
while (i >= 0 && mp_isalpha(name.start[i])) {
n++;
if (n > 3)
return (struct bstr){NULL, 0};
i--;
}
if (n < 2 || i == 0 || name.start[i] != thing)
return (struct bstr){NULL, 0};
*fn_start = i;
return (struct bstr){name.start + i + 1, n};
}
static void append_dir_subtitles(struct mpv_global *global, struct MPOpts *opts,
struct subfn **slist, int *nsub,
struct bstr path, const char *fname,
int limit_fuzziness, int limit_type)
{
void *tmpmem = talloc_new(NULL);
struct mp_log *log = mp_log_new(tmpmem, global->log, "find_files");
struct bstr f_fbname = bstr0(mp_basename(fname));
struct bstr f_fname = mp_iconv_to_utf8(log, f_fbname,
"UTF-8-MAC", MP_NO_LATIN1_FALLBACK);
struct bstr f_fname_noext = bstrdup(tmpmem, bstr_strip_ext(f_fname));
bstr_lower(f_fname_noext);
struct bstr f_fname_trim = bstr_strip(f_fname_noext);
if (f_fbname.start != f_fname.start)
talloc_steal(tmpmem, f_fname.start);
char *path0 = bstrdup0(tmpmem, path);
if (mp_is_url(bstr0(path0)))
goto out;
DIR *d = opendir(path0);
if (!d)
goto out;
mp_verbose(log, "Loading external files in %.*s\n", BSTR_P(path));
struct dirent *de;
while ((de = readdir(d))) {
void *tmpmem2 = talloc_new(tmpmem);
struct bstr den = bstr0(de->d_name);
struct bstr dename = mp_iconv_to_utf8(log, den,
"UTF-8-MAC", MP_NO_LATIN1_FALLBACK);
// retrieve various parts of the filename
struct bstr tmp_fname_noext = bstrdup(tmpmem2, bstr_strip_ext(dename));
bstr_lower(tmp_fname_noext);
struct bstr tmp_fname_ext = bstr_get_ext(dename);
struct bstr tmp_fname_trim = bstr_strip(tmp_fname_noext);
if (den.start != dename.start)
talloc_steal(tmpmem2, dename.start);
// check what it is (most likely)
int type = test_ext(tmp_fname_ext);
char **langs = NULL;
int fuzz = -1;
switch (type) {
case STREAM_SUB:
langs = opts->stream_lang[type];
fuzz = opts->sub_auto;
break;
case STREAM_AUDIO:
langs = opts->stream_lang[type];
fuzz = opts->audiofile_auto;
break;
case STREAM_VIDEO:
fuzz = opts->coverart_auto;
break;
}
if (fuzz < 0 || (limit_type >= 0 && limit_type != type))
goto next_sub;
// we have a (likely) subtitle file
// higher prio -> auto-selection may prefer it (0 = not loaded)
int prio = 0;
if (bstrcmp(tmp_fname_trim, f_fname_trim) == 0)
prio |= 32; // exact movie name match
bstr lang = {0};
if (bstr_startswith(tmp_fname_trim, f_fname_trim)) {
int start = 0;
lang = guess_lang_from_filename(tmp_fname_trim, &start);
if (lang.len && start == f_fname_trim.len)
prio |= 16; // exact movie name + followed by lang
}
for (int n = 0; langs && langs[n]; n++) {
if (lang.len && bstr_case_startswith(lang, bstr0(langs[n]))) {
if (fuzz >= 1)
prio |= 8; // known language -> boost priority
break;
}
}
if (lang.len && fuzz >= 1)
prio |= 4; // matches the movie name + a language was matched
if (bstr_find(tmp_fname_trim, f_fname_trim) >= 0 && fuzz >= 1)
prio |= 2; // contains the movie name
if (type == STREAM_VIDEO && opts->coverart_whitelist && prio == 0)
prio = test_cover_filename(dename);
// doesn't contain the movie name
// don't try in the mplayer subtitle directory
if (!limit_fuzziness && fuzz >= 2)
prio |= 1;
mp_dbg(log, "Potential external file: \"%s\" Priority: %d\n",
de->d_name, prio);
if (prio) {
char *subpath = mp_path_join_bstr(*slist, path, dename);
if (mp_path_exists(subpath)) {
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MP_TARRAY_GROW(NULL, *slist, *nsub);
struct subfn *sub = *slist + (*nsub)++;
// annoying and redundant
if (strncmp(subpath, "./", 2) == 0)
subpath += 2;
sub->type = type;
sub->priority = prio;
sub->fname = subpath;
sub->lang = lang.len ? bstrdup0(*slist, lang) : NULL;
} else
talloc_free(subpath);
}
next_sub:
talloc_free(tmpmem2);
}
closedir(d);
out:
talloc_free(tmpmem);
}
static bool case_endswith(const char *s, const char *end)
{
size_t len = strlen(s);
size_t elen = strlen(end);
return len >= elen && strcasecmp(s + len - elen, end) == 0;
}
// Drop .sub file if .idx file exists.
// Assumes slist is sorted by compare_sub_filename.
static void filter_subidx(struct subfn **slist, int *nsub)
{
const char *prev = NULL;
for (int n = 0; n < *nsub; n++) {
const char *fname = (*slist)[n].fname;
if (case_endswith(fname, ".idx")) {
prev = fname;
} else if (case_endswith(fname, ".sub")) {
if (prev && strncmp(prev, fname, strlen(fname) - 4) == 0)
(*slist)[n].priority = -1;
}
}
for (int n = *nsub - 1; n >= 0; n--) {
if ((*slist)[n].priority < 0)
MP_TARRAY_REMOVE_AT(*slist, *nsub, n);
}
}
static void load_paths(struct mpv_global *global, struct MPOpts *opts,
struct subfn **slist, int *nsubs, const char *fname,
char **paths, char *cfg_path, int type)
{
for (int i = 0; paths && paths[i]; i++) {
char *expanded_path = mp_get_user_path(NULL, global, paths[i]);
char *path = mp_path_join_bstr(
*slist, mp_dirname(fname),
bstr0(expanded_path ? expanded_path : paths[i]));
append_dir_subtitles(global, opts, slist, nsubs, bstr0(path),
fname, 0, type);
talloc_free(expanded_path);
}
// Load subtitles in ~/.mpv/sub (or similar) limiting sub fuzziness
char *mp_subdir = mp_find_config_file(NULL, global, cfg_path);
if (mp_subdir) {
append_dir_subtitles(global, opts, slist, nsubs, bstr0(mp_subdir),
fname, 1, type);
}
talloc_free(mp_subdir);
}
// Return a list of subtitles and audio files found, sorted by priority.
// Last element is terminated with a fname==NULL entry.
struct subfn *find_external_files(struct mpv_global *global, const char *fname,
struct MPOpts *opts)
{
struct subfn *slist = talloc_array_ptrtype(NULL, slist, 1);
int n = 0;
// Load subtitles from current media directory
append_dir_subtitles(global, opts, &slist, &n, mp_dirname(fname), fname, 0, -1);
// Load subtitles in dirs specified by sub-paths option
if (opts->sub_auto >= 0) {
load_paths(global, opts, &slist, &n, fname, opts->sub_paths, "sub",
STREAM_SUB);
}
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if (opts->audiofile_auto >= 0) {
load_paths(global, opts, &slist, &n, fname, opts->audiofile_paths,
"audio", STREAM_AUDIO);
}
// Sort by name for filter_subidx()
qsort(slist, n, sizeof(*slist), compare_sub_filename);
filter_subidx(&slist, &n);
// Sort subs by priority and append them
qsort(slist, n, sizeof(*slist), compare_sub_priority);
struct subfn z = {0};
MP_TARRAY_APPEND(NULL, slist, n, z);
return slist;
}