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🎥 Command line media player
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#include <string.h>#include <strings.h>#include <sys/types.h>#include <dirent.h>#include <math.h>#include <pthread.h>#include <assert.h>#include <unistd.h>
#include "config.h"
#include "osdep/io.h"#include "osdep/subprocess.h"#include "osdep/threads.h"
#include "common/common.h"#include "common/msg.h"#include "input/input.h"#include "options/m_config.h"#include "options/parse_configfile.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;extern const struct mp_scripting mp_scripting_cplugin;extern const struct mp_scripting mp_scripting_js;extern const struct mp_scripting mp_scripting_run;
static const struct mp_scripting *const scripting_backends[] = {#if HAVE_LUA &mp_scripting_lua,#endif#if HAVE_CPLUGINS &mp_scripting_cplugin,#endif#if HAVE_JAVASCRIPT &mp_scripting_js,#endif &mp_scripting_run, 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);}
static void run_script(struct mp_script_args *arg){ char name[90]; snprintf(name, sizeof(name), "%s (%s)", arg->backend->name, mpv_client_name(arg->client)); mpthread_set_name(name);
if (arg->backend->load(arg) < 0) MP_ERR(arg, "Could not load %s %s\n", arg->backend->name, arg->filename);
mpv_destroy(arg->client); talloc_free(arg);}
static void *script_thread(void *p){ pthread_detach(pthread_self());
struct mp_script_args *arg = p; run_script(arg);
return NULL;}
static int64_t mp_load_script(struct MPContext *mpctx, const char *fname){ char *ext = mp_splitext(fname, NULL); if (ext && strcasecmp(ext, "disable") == 0) return 0;
void *tmp = talloc_new(NULL);
const char *path = NULL; char *script_name = NULL; const struct mp_scripting *backend = NULL;
struct stat s; if (!stat(fname, &s) && S_ISDIR(s.st_mode)) { path = fname; fname = NULL;
for (int n = 0; scripting_backends[n]; n++) { const struct mp_scripting *b = scripting_backends[n]; char *filename = mp_tprintf(80, "main.%s", b->file_ext); fname = mp_path_join(tmp, path, filename); if (!stat(fname, &s) && S_ISREG(s.st_mode)) { backend = b; break; } talloc_free((void *)fname); fname = NULL; }
if (!fname) { MP_ERR(mpctx, "Cannot find main.* for any supported scripting " "backend in: %s\n", path); talloc_free(tmp); return -1; }
script_name = talloc_strdup(tmp, path); mp_path_strip_trailing_separator(script_name); script_name = mp_basename(script_name); } else { 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; } } script_name = script_name_from_filename(tmp, fname); }
if (!backend) { MP_ERR(mpctx, "Can't load unknown script: %s\n", fname); talloc_free(tmp); return -1; }
struct mp_script_args *arg = talloc_ptrtype(NULL, arg); *arg = (struct mp_script_args){ .mpctx = mpctx, .filename = talloc_strdup(arg, fname), .path = talloc_strdup(arg, path), .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, script_name), };
talloc_free(tmp);
if (!arg->client) { MP_ERR(mpctx, "Failed to create client for script: %s\n", fname); talloc_free(arg); return -1; }
mp_client_set_weak(arg->client); arg->log = mp_client_get_log(arg->client); int64_t id = mpv_client_id(arg->client);
MP_DBG(arg, "Loading %s %s...\n", backend->name, fname);
if (backend->no_thread) { run_script(arg); } else { pthread_t thread; if (pthread_create(&thread, NULL, script_thread, arg)) { mpv_destroy(arg->client); talloc_free(arg); return -1; } }
return id;}
int64_t mp_load_user_script(struct MPContext *mpctx, const char *fname){ char *path = mp_get_user_path(NULL, mpctx->global, fname); int64_t ret = mp_load_script(mpctx, path); talloc_free(path); return ret;}
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))) { if (ep->d_name[0] != '.') { char *fname = mp_path_join(talloc_ctx, path, ep->d_name); struct stat s; if (!stat(fname, &s) && (S_ISREG(s.st_mode) || S_ISDIR(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;}
static void load_builtin_script(struct MPContext *mpctx, int slot, bool enable, const char *fname){ assert(slot < MP_ARRAY_SIZE(mpctx->builtin_script_ids)); int64_t *pid = &mpctx->builtin_script_ids[slot]; if (*pid > 0 && !mp_client_id_exists(mpctx, *pid)) *pid = 0; // died if ((*pid > 0) != enable) { if (enable) { *pid = mp_load_script(mpctx, fname); } else { char *name = mp_tprintf(22, "@%"PRIi64, *pid); mp_client_send_event(mpctx, name, 0, MPV_EVENT_SHUTDOWN, NULL); } }}
void mp_load_builtin_scripts(struct MPContext *mpctx){ load_builtin_script(mpctx, 0, mpctx->opts->lua_load_osc, "@osc.lua"); load_builtin_script(mpctx, 1, mpctx->opts->lua_load_ytdl, "@ytdl_hook.lua"); load_builtin_script(mpctx, 2, mpctx->opts->lua_load_stats, "@stats.lua"); load_builtin_script(mpctx, 3, mpctx->opts->lua_load_console, "@console.lua");}
bool mp_load_scripts(struct MPContext *mpctx){ bool ok = true;
// Load scripts from options char **files = mpctx->opts->script_files; for (int n = 0; files && files[n]; n++) { if (files[n][0]) ok &= mp_load_user_script(mpctx, files[n]) >= 0; } if (!mpctx->opts->auto_load_scripts) return ok;
// 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++) ok &= mp_load_script(mpctx, files[n]) >= 0; } talloc_free(tmp);
return ok;}
#if HAVE_CPLUGINS
#include <dlfcn.h>
#define MPV_DLOPEN_FN "mpv_open_cplugin"typedef int (*mpv_open_cplugin)(mpv_handle *handle);
static int load_cplugin(struct mp_script_args *args){ void *lib = dlopen(args->filename, RTLD_NOW | RTLD_LOCAL); if (!lib) goto error; // Note: once loaded, we never unload, as unloading the libraries linked to // the plugin can cause random serious problems. mpv_open_cplugin sym = (mpv_open_cplugin)dlsym(lib, MPV_DLOPEN_FN); if (!sym) goto error; return sym(args->client) ? -1 : 0;error: ; char *err = dlerror(); if (err) MP_ERR(args, "C plugin error: '%s'\n", err); return -1;}
const struct mp_scripting mp_scripting_cplugin = { .name = "SO plugin", .file_ext = "so", .load = load_cplugin,};
#endif
static int load_run(struct mp_script_args *args){ // The arg->client object might die and with it args->log, so duplicate it. args->log = mp_log_new(args, args->log, NULL);
int fds[2]; if (!mp_ipc_start_anon_client(args->mpctx->ipc_ctx, args->client, fds)) return -1; args->client = NULL; // ownership lost
// Hardcode them (according to opts.fds[]), because we want to allow clients // to hardcode them if they want. Sue me. char *fdopt = fds[1] >= 0 ? "--mpv-ipc-fd=3:4" : "--mpv-ipc-fd=3";
struct mp_subprocess_opts opts = { .exe = (char *)args->filename, .args = (char *[]){(char *)args->filename, fdopt, NULL}, .fds = { // Keep terminal stuff {.fd = 0, .src_fd = 0,}, {.fd = 1, .src_fd = 1,}, {.fd = 2, .src_fd = 2,}, // Just hope these don't step over each other (e.g. fds[1] is not // below 4, if the std FDs are missing). {.fd = 3, .src_fd = fds[0], }, {.fd = 4, .src_fd = fds[1], }, }, .num_fds = fds[1] >= 0 ? 4 : 5, .detach = true, }; struct mp_subprocess_result res; mp_subprocess2(&opts, &res);
// Closing these will (probably) make the client exit, if it really died. // They _should_ be CLOEXEC, but are not, because // posix_spawn_file_actions_adddup2() may not clear the CLOEXEC flag // properly if by coincidence fd==src_fd. close(fds[0]); if (fds[1] >= 0) close(fds[1]);
if (res.error < 0) { MP_ERR(args, "Starting '%s' failed: %s\n", args->filename, mp_subprocess_err_str(res.error)); return -1; }
return 0;}
const struct mp_scripting mp_scripting_run = { .name = "spawned IPC process", .file_ext = "run", .no_thread = true, .load = load_run,};