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-rw-r--r--player/external_files.c284
1 files changed, 284 insertions, 0 deletions
diff --git a/player/external_files.c b/player/external_files.c
new file mode 100644
index 0000000000..77e12db066
--- /dev/null
+++ b/player/external_files.c
@@ -0,0 +1,284 @@
+#include <dirent.h>
+#include <string.h>
+#include <strings.h>
+#include <stdlib.h>
+#include <assert.h>
+
+#include "osdep/io.h"
+
+#include "common/common.h"
+#include "common/global.h"
+#include "common/msg.h"
+#include "misc/ctype.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",
+ "smi", "rt", "txt", "ssa", "aqt", "jss",
+ "js", "ass", "mks", "vtt", "sup", NULL};
+
+static const char *const audio_exts[] = {"mp3", "aac", "mka", "dts", "flac",
+ "ogg", "m4a", "ac3", "opus", 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;
+ return -1;
+}
+
+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);
+}
+
+bool mp_might_be_subtitle_file(const char *filename)
+{
+ return test_ext(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)
+{
+ 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 && mp_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};
+}
+
+static void append_dir_subtitles(struct mpv_global *global,
+ struct subfn **slist, int *nsub,
+ struct bstr path, const char *fname,
+ int limit_fuzziness)
+{
+ void *tmpmem = talloc_new(NULL);
+ struct MPOpts *opts = global->opts;
+ struct mp_log *log = mp_log_new(tmpmem, global->log, "find_files");
+
+ if (mp_is_url(bstr0(fname)))
+ goto out;
+
+ 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_verbose(log, "Loading external files 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);
+
+ // 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;
+ }
+
+ if (fuzz < 0)
+ goto next_sub;
+
+ // we have a (likely) subtitle file
+ int prio = 0;
+ char *found_lang = NULL;
+ if (langs) {
+ 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; langs[n]; n++) {
+ if (bstr_startswith0(lang, langs[n])) {
+ prio = 4; // matches the movie name + lang extension
+ found_lang = langs[n];
+ 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 && fuzz >= 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 && fuzz >= 2) {
+ prio = 1;
+ }
+ }
+
+ mp_dbg(log, "Potential external file: \"%s\" Priority: %d\n",
+ de->d_name, prio);
+
+ if (prio) {
+ prio += prio;
+ char *subpath = mp_path_join_bstr(*slist, path, dename);
+ if (mp_path_exists(subpath)) {
+ MP_GROW_ARRAY(*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 = found_lang;
+ } 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);
+ }
+}
+
+// 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 = global->opts;
+ struct subfn *slist = talloc_array_ptrtype(NULL, slist, 1);
+ int n = 0;
+
+ // Load subtitles from current media directory
+ append_dir_subtitles(global, &slist, &n, mp_dirname(fname), fname, 0);
+
+ if (opts->sub_auto >= 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_bstr(slist, mp_dirname(fname),
+ bstr0(opts->sub_paths[i]));
+ append_dir_subtitles(global, &slist, &n, bstr0(path), fname, 0);
+ }
+ }
+
+ // Load subtitles in ~/.mpv/sub limiting sub fuzziness
+ char *mp_subdir = mp_find_config_file(NULL, global, "sub/");
+ if (mp_subdir)
+ append_dir_subtitles(global, &slist, &n, bstr0(mp_subdir), fname, 1);
+ talloc_free(mp_subdir);
+ }
+
+ // 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;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-04 19:10:29 +0000