summaryrefslogtreecommitdiffstats
path: root/player/scripting.c
blob: cb35b1bfd75aece66de760591fa5eacc9685d948 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
/*
 * 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 <string.h>
#include <strings.h>
#include <sys/types.h>
#include <dirent.h>
#include <math.h>
#include <pthread.h>
#include <assert.h>

#include "config.h"

#include "osdep/io.h"
#include "osdep/threads.h"

#include "common/common.h"
#include "common/msg.h"
#include "options/path.h"
#include "misc/bstr.h"
#include "core.h"
#include "client.h"
#include "libmpv/client.h"

extern const struct mp_scripting mp_scripting_lua;

static const struct mp_scripting *const scripting_backends[] = {
#if HAVE_LUA
    &mp_scripting_lua,
#endif
    NULL
};

static char *script_name_from_filename(void *talloc_ctx, const char *fname)
{
    fname = mp_basename(fname);
    if (fname[0] == '@')
        fname += 1;
    char *name = talloc_strdup(talloc_ctx, fname);
    // Drop file extension
    char *dot = strrchr(name, '.');
    if (dot)
        *dot = '\0';
    // Turn it into a safe identifier - this is used with e.g. dispatching
    // input via: "send scriptname ..."
    for (int n = 0; name[n]; n++) {
        char c = name[n];
        if (!(c >= 'A' && c <= 'Z') && !(c >= 'a' && c <= 'z') &&
            !(c >= '0' && c <= '9'))
            name[n] = '_';
    }
    return talloc_asprintf(talloc_ctx, "%s", name);
}

struct thread_arg {
    struct mp_log *log;
    const struct mp_scripting *backend;
    mpv_handle *client;
    const char *fname;
};

static void *script_thread(void *p)
{
    pthread_detach(pthread_self());

    struct thread_arg *arg = p;

    char name[90];
    snprintf(name, sizeof(name), "lua (%s)", mpv_client_name(arg->client));
    mpthread_set_name(name);

    if (arg->backend->load(arg->client, arg->fname) < 0)
        MP_ERR(arg, "Could not load script %s\n", arg->fname);

    MP_VERBOSE(arg, "Exiting...\n");

    mpv_detach_destroy(arg->client);
    talloc_free(arg);
    return NULL;
}

static void wait_loaded(struct MPContext *mpctx)
{
    while (!mp_clients_all_initialized(mpctx))
        mp_idle(mpctx);
}

static void mp_load_script(struct MPContext *mpctx, const char *fname)
{
    char *ext = mp_splitext(fname, NULL);
    const struct mp_scripting *backend = NULL;
    for (int n = 0; scripting_backends[n]; n++) {
        const struct mp_scripting *b = scripting_backends[n];
        if (ext && strcasecmp(ext, b->file_ext) == 0) {
            backend = b;
            break;
        }
    }

    if (!backend) {
        MP_VERBOSE(mpctx, "Can't load unknown script: %s\n", fname);
        return;
    }

    struct thread_arg *arg = talloc_ptrtype(NULL, arg);
    char *name = script_name_from_filename(arg, fname);
    *arg = (struct thread_arg){
        .fname = talloc_strdup(arg, fname),
        .backend = backend,
        // Create the client before creating the thread; otherwise a race
        // condition could happen, where MPContext is destroyed while the
        // thread tries to create the client.
        .client = mp_new_client(mpctx->clients, name),
    };
    if (!arg->client) {
        talloc_free(arg);
        return;
    }
    arg->log = mp_client_get_log(arg->client);

    MP_VERBOSE(arg, "Loading script %s...\n", fname);

    pthread_t thread;
    if (pthread_create(&thread, NULL, script_thread, arg)) {
        mpv_detach_destroy(arg->client);
        talloc_free(arg);
        return;
    }

    wait_loaded(mpctx);
    MP_VERBOSE(mpctx, "Done loading %s.\n", fname);

    return;
}

static int compare_filename(const void *pa, const void *pb)
{
    char *a = (char *)pa;
    char *b = (char *)pb;
    return strcmp(a, b);
}

static char **list_script_files(void *talloc_ctx, char *path)
{
    char **files = NULL;
    int count = 0;
    DIR *dp = opendir(path);
    if (!dp)
        return NULL;
    struct dirent *ep;
    while ((ep = readdir(dp))) {
        char *fname = mp_path_join(talloc_ctx, path, ep->d_name);
        struct stat s;
        if (!stat(fname, &s) && S_ISREG(s.st_mode))
            MP_TARRAY_APPEND(talloc_ctx, files, count, fname);
    }
    closedir(dp);
    if (files)
        qsort(files, count, sizeof(char *), compare_filename);
    MP_TARRAY_APPEND(talloc_ctx, files, count, NULL);
    return files;
}

void mp_load_scripts(struct MPContext *mpctx)
{
    // Load scripts from options
    if (mpctx->opts->lua_load_osc)
        mp_load_script(mpctx, "@osc.lua");
    if (mpctx->opts->lua_load_ytdl)
        mp_load_script(mpctx, "@ytdl_hook.lua");
    char **files = mpctx->opts->script_files;
    for (int n = 0; files && files[n]; n++) {
        if (files[n][0])
            mp_load_script(mpctx, files[n]);
    }
    if (!mpctx->opts->auto_load_scripts)
        return;

    // Load all scripts
    void *tmp = talloc_new(NULL);
    char **scriptsdir = mp_find_all_config_files(tmp, mpctx->global, "scripts");
    for (int i = 0; scriptsdir && scriptsdir[i]; i++) {
        files = list_script_files(tmp, scriptsdir[i]);
        for (int n = 0; files && files[n]; n++)
            mp_load_script(mpctx, files[n]);
    }
    talloc_free(tmp);
}