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mpv/demux/demux_playlist.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 <stdlib.h>
#include <string.h>
#include <libavutil/common.h>
#include "common/common.h"
#include "options/options.h"
#include "options/m_config.h"
#include "common/msg.h"
#include "common/playlist.h"
#include "misc/charset_conv.h"
#include "misc/thread_tools.h"
#include "options/path.h"
#include "player/core.h"
#include "stream/stream.h"
#include "osdep/io.h"
#include "misc/natural_sort.h"
#include "demux.h"
#define PROBE_SIZE (8 * 1024)
enum dir_mode {
DIR_AUTO,
DIR_LAZY,
DIR_RECURSIVE,
DIR_IGNORE,
};
enum autocreate_mode {
AUTO_NONE = 0,
AUTO_VIDEO = 1 << 0,
AUTO_AUDIO = 1 << 1,
AUTO_IMAGE = 1 << 2,
AUTO_ANY = 1 << 3,
};
#define OPT_BASE_STRUCT struct demux_playlist_opts
struct demux_playlist_opts {
int dir_mode;
char **directory_filter;
};
struct m_sub_options demux_playlist_conf = {
.opts = (const struct m_option[]) {
{"directory-mode", OPT_CHOICE(dir_mode,
{"auto", DIR_AUTO},
{"lazy", DIR_LAZY},
{"recursive", DIR_RECURSIVE},
{"ignore", DIR_IGNORE})},
{"directory-filter-types",
OPT_STRINGLIST(directory_filter)},
{0}
},
.size = sizeof(struct demux_playlist_opts),
.defaults = &(const struct demux_playlist_opts){
.dir_mode = DIR_AUTO,
.directory_filter = (char *[]){
"video", "audio", "image", NULL
},
},
};
static bool check_mimetype(struct stream *s, const char *const *list)
{
if (s->mime_type) {
for (int n = 0; list && list[n]; n++) {
if (strcasecmp(s->mime_type, list[n]) == 0)
return true;
}
}
return false;
}
struct pl_parser {
struct mpv_global *global;
struct mp_log *log;
struct stream *s;
char buffer[2 * 1024 * 1024];
int utf16;
struct playlist *pl;
bool error;
bool probing;
bool force;
bool add_base;
bool line_allocated;
int autocreate_playlist;
enum demux_check check_level;
struct stream *real_stream;
char *format;
char *codepage;
struct demux_playlist_opts *opts;
struct MPOpts *mp_opts;
};
static uint16_t stream_read_word_endian(stream_t *s, bool big_endian)
{
unsigned int y = stream_read_char(s);
y = (y << 8) | stream_read_char(s);
if (!big_endian)
y = ((y >> 8) & 0xFF) | (y << 8);
return y;
}
// Read characters until the next '\n' (including), or until the buffer in s is
// exhausted.
static int read_characters(stream_t *s, uint8_t *dst, int dstsize, int utf16)
{
if (utf16 == 1 || utf16 == 2) {
uint8_t *cur = dst;
while (1) {
if ((cur - dst) + 8 >= dstsize) // PUT_UTF8 writes max. 8 bytes
return -1; // line too long
uint32_t c;
uint8_t tmp;
GET_UTF16(c, stream_read_word_endian(s, utf16 == 2), return -1;)
if (s->eof)
break; // legitimate EOF; ignore the case of partial reads
PUT_UTF8(c, tmp, *cur++ = tmp;)
if (c == '\n')
break;
}
return cur - dst;
} else {
uint8_t buf[1024];
int buf_len = stream_read_peek(s, buf, sizeof(buf));
uint8_t *end = memchr(buf, '\n', buf_len);
int len = end ? end - buf + 1 : buf_len;
if (len > dstsize)
return -1; // line too long
memcpy(dst, buf, len);
stream_seek_skip(s, stream_tell(s) + len);
return len;
}
}
// On error, or if the line is larger than max-1, return NULL and unset s->eof.
// On EOF, return NULL, and s->eof will be set.
// Otherwise, return the line (including \n or \r\n at the end of the line).
// If the return value is non-NULL, it's always the same as mem.
// utf16: 0: UTF8 or 8 bit legacy, 1: UTF16-LE, 2: UTF16-BE
static char *read_line(stream_t *s, char *mem, int max, int utf16)
{
if (max < 1)
return NULL;
int read = 0;
while (1) {
// Reserve 1 byte of ptr for terminating \0.
int l = read_characters(s, &mem[read], max - read - 1, utf16);
if (l < 0 || memchr(&mem[read], '\0', l)) {
MP_WARN(s, "error reading line\n");
return NULL;
}
read += l;
if (l == 0 || (read > 0 && mem[read - 1] == '\n'))
break;
}
mem[read] = '\0';
if (!stream_read_peek(s, &(char){0}, 1) && read == 0) // legitimate EOF
return NULL;
return mem;
}
static char *pl_get_line0(struct pl_parser *p)
{
char *res = read_line(p->s, p->buffer, sizeof(p->buffer), p->utf16);
if (res) {
int len = strlen(res);
if (len > 0 && res[len - 1] == '\n')
res[len - 1] = '\0';
} else {
p->error |= !p->s->eof;
}
return res;
}
static bstr pl_get_line(struct pl_parser *p)
{
bstr line = bstr_strip(bstr0(pl_get_line0(p)));
const char *charset = mp_charset_guess(p, p->log, line, p->codepage, 0);
if (charset && !mp_charset_is_utf8(charset)) {
bstr utf8 = mp_iconv_to_utf8(p->log, line, charset, 0);
if (utf8.start && utf8.start != line.start) {
line = utf8;
p->line_allocated = true;
}
}
return line;
}
// Helper in case mp_iconv_to_utf8 allocates memory
static void pl_free_line(struct pl_parser *p, bstr line)
{
if (p->line_allocated) {
talloc_free(line.start);
p->line_allocated = false;
}
}
static void pl_add(struct pl_parser *p, bstr entry)
{
char *s = bstrto0(NULL, entry);
playlist_append_file(p->pl, s);
talloc_free(s);
}
static bool pl_eof(struct pl_parser *p)
{
return p->error || p->s->eof;
}
static bool maybe_text(bstr d)
{
for (int n = 0; n < d.len; n++) {
unsigned char c = d.start[n];
if (c < 32 && c != '\n' && c != '\r' && c != '\t')
return false;
}
return true;
}
static int parse_m3u(struct pl_parser *p)
{
bstr line = pl_get_line(p);
if (p->probing && !bstr_equals0(line, "#EXTM3U")) {
// Last resort: if the file extension is m3u, it might be headerless.
if (p->check_level == DEMUX_CHECK_UNSAFE) {
char *ext = mp_splitext(p->real_stream->url, NULL);
char probe[PROBE_SIZE];
int len = stream_read_peek(p->real_stream, probe, sizeof(probe));
bstr data = {probe, len};
if (ext && data.len >= 2 && maybe_text(data)) {
const char *exts[] = {"m3u", "m3u8", NULL};
for (int n = 0; exts[n]; n++) {
if (strcasecmp(ext, exts[n]) == 0)
goto ok;
}
}
}
pl_free_line(p, line);
return -1;
}
ok:
if (p->probing) {
pl_free_line(p, line);
return 0;
}
char *title = NULL;
while (line.len || !pl_eof(p)) {
bstr line_dup = line;
if (bstr_eatstart0(&line_dup, "#EXTINF:")) {
bstr duration, btitle;
if (bstr_split_tok(line_dup, ",", &duration, &btitle) && btitle.len) {
talloc_free(title);
title = bstrto0(NULL, btitle);
}
} else if (bstr_startswith0(line_dup, "#EXT-X-")) {
p->format = "hls";
} else if (line_dup.len > 0 && !bstr_startswith0(line_dup, "#")) {
char *fn = bstrto0(NULL, line_dup);
struct playlist_entry *e = playlist_entry_new(fn);
talloc_free(fn);
e->title = talloc_steal(e, title);
title = NULL;
playlist_insert_at(p->pl, e, NULL);
}
pl_free_line(p, line);
line = pl_get_line(p);
}
pl_free_line(p, line);
talloc_free(title);
return 0;
}
static int parse_ref_init(struct pl_parser *p)
{
bstr line = pl_get_line(p);
if (!bstr_equals0(line, "[Reference]")) {
pl_free_line(p, line);
return -1;
}
pl_free_line(p, line);
// ASF http streaming redirection - this is needed because ffmpeg http://
// and mmsh:// can not automatically switch automatically between each
// others. Both protocols use http - MMSH requires special http headers
// to "activate" it, and will in other cases return this playlist.
static const char *const mmsh_types[] = {"audio/x-ms-wax",
"audio/x-ms-wma", "video/x-ms-asf", "video/x-ms-afs", "video/x-ms-wmv",
"video/x-ms-wma", "application/x-mms-framed",
"application/vnd.ms.wms-hdr.asfv1", NULL};
bstr burl = bstr0(p->s->url);
if (bstr_eatstart0(&burl, "http://") && check_mimetype(p->s, mmsh_types)) {
MP_INFO(p, "Redirecting to mmsh://\n");
playlist_append_file(p->pl, talloc_asprintf(p, "mmsh://%.*s", BSTR_P(burl)));
return 0;
}
while (!pl_eof(p)) {
line = pl_get_line(p);
bstr value;
if (bstr_case_startswith(line, bstr0("Ref"))) {
bstr_split_tok(line, "=", &(bstr){0}, &value);
if (value.len)
pl_add(p, value);
}
pl_free_line(p, line);
}
return 0;
}
static int parse_ini_thing(struct pl_parser *p, const char *header,
const char *entry)
{
bstr line = {0};
while (!line.len && !pl_eof(p))
line = pl_get_line(p);
if (bstrcasecmp0(line, header) != 0) {
pl_free_line(p, line);
return -1;
}
if (p->probing) {
pl_free_line(p, line);
return 0;
}
pl_free_line(p, line);
while (!pl_eof(p)) {
line = pl_get_line(p);
bstr key, value;
if (bstr_split_tok(line, "=", &key, &value) &&
bstr_case_startswith(key, bstr0(entry)))
{
value = bstr_strip(value);
if (bstr_startswith0(value, "\"") && bstr_endswith0(value, "\""))
value = bstr_splice(value, 1, -1);
pl_add(p, value);
}
pl_free_line(p, line);
}
return 0;
}
static int parse_pls(struct pl_parser *p)
{
return parse_ini_thing(p, "[playlist]", "File");
}
static int parse_url(struct pl_parser *p)
{
return parse_ini_thing(p, "[InternetShortcut]", "URL");
}
static int parse_txt(struct pl_parser *p)
{
if (!p->force)
return -1;
if (p->probing)
return 0;
MP_WARN(p, "Reading plaintext playlist.\n");
while (!pl_eof(p)) {
bstr line = pl_get_line(p);
if (line.len == 0)
continue;
pl_add(p, line);
pl_free_line(p, line);
}
return 0;
}
#define MAX_DIR_STACK 20
static bool same_st(struct stat *st1, struct stat *st2)
{
return st1->st_dev == st2->st_dev && st1->st_ino == st2->st_ino;
}
struct pl_dir_entry {
char *path;
char *name;
struct stat st;
bool is_dir;
};
static int cmp_dir_entry(const void *a, const void *b)
{
struct pl_dir_entry *a_entry = (struct pl_dir_entry*) a;
struct pl_dir_entry *b_entry = (struct pl_dir_entry*) b;
if (a_entry->is_dir == b_entry->is_dir) {
return mp_natural_sort_cmp(a_entry->name, b_entry->name);
} else {
return a_entry->is_dir ? 1 : -1;
}
}
static bool test_path(struct pl_parser *p, char *path, int autocreate)
{
if (autocreate & AUTO_ANY)
return true;
bstr ext = bstr_get_ext(bstr0(path));
if (autocreate & AUTO_VIDEO && str_in_list(ext, p->mp_opts->video_exts))
return true;
if (autocreate & AUTO_AUDIO && str_in_list(ext, p->mp_opts->audio_exts))
return true;
if (autocreate & AUTO_IMAGE && str_in_list(ext, p->mp_opts->image_exts))
return true;
return false;
}
// Return true if this was a readable directory.
static bool scan_dir(struct pl_parser *p, char *path,
struct stat *dir_stack, int num_dir_stack, int autocreate)
{
if (strlen(path) >= 8192 || num_dir_stack == MAX_DIR_STACK)
return false; // things like mount bind loops
DIR *dp = opendir(path);
if (!dp) {
MP_ERR(p, "Could not read directory.\n");
return false;
}
struct pl_dir_entry *dir_entries = NULL;
int num_dir_entries = 0;
int path_len = strlen(path);
int dir_mode = p->opts->dir_mode;
struct dirent *ep;
while ((ep = readdir(dp))) {
if (ep->d_name[0] == '.')
continue;
if (mp_cancel_test(p->s->cancel))
break;
char *file = mp_path_join(p, path, ep->d_name);
struct stat st;
if (stat(file, &st) == 0 && S_ISDIR(st.st_mode)) {
if (dir_mode != DIR_IGNORE) {
for (int n = 0; n < num_dir_stack; n++) {
if (same_st(&dir_stack[n], &st)) {
MP_VERBOSE(p, "Skip recursive entry: %s\n", file);
goto skip;
}
}
struct pl_dir_entry d = {file, &file[path_len], st, true};
MP_TARRAY_APPEND(p, dir_entries, num_dir_entries, d);
}
} else {
struct pl_dir_entry f = {file, &file[path_len], .is_dir = false};
MP_TARRAY_APPEND(p, dir_entries, num_dir_entries, f);
}
skip: ;
}
closedir(dp);
if (dir_entries)
qsort(dir_entries, num_dir_entries, sizeof(dir_entries[0]), cmp_dir_entry);
for (int n = 0; n < num_dir_entries; n++) {
char *file = dir_entries[n].path;
if (dir_mode == DIR_RECURSIVE && dir_entries[n].is_dir) {
dir_stack[num_dir_stack] = dir_entries[n].st;
scan_dir(p, file, dir_stack, num_dir_stack + 1, autocreate);
}
else {
if (dir_entries[n].is_dir || test_path(p, file, autocreate))
playlist_append_file(p->pl, dir_entries[n].path);
}
}
return true;
}
static int parse_dir(struct pl_parser *p)
{
int ret = -1;
struct stream *stream = p->real_stream;
int autocreate = AUTO_NONE;
p->pl->playlist_dir = NULL;
if (p->autocreate_playlist && p->real_stream->is_local_file && !p->real_stream->is_directory) {
bstr ext = bstr_get_ext(bstr0(p->real_stream->url));
switch (p->autocreate_playlist) {
case 1: // any
autocreate = AUTO_ANY;
break;
case 2: // filter
autocreate = AUTO_VIDEO | AUTO_AUDIO | AUTO_IMAGE;
break;
case 3: // same
if (str_in_list(ext, p->mp_opts->video_exts)) {
autocreate = AUTO_VIDEO;
} else if (str_in_list(ext, p->mp_opts->audio_exts)) {
autocreate = AUTO_AUDIO;
} else if (str_in_list(ext, p->mp_opts->image_exts)) {
autocreate = AUTO_IMAGE;
}
break;
}
int flags = STREAM_ORIGIN_DIRECT | STREAM_READ | STREAM_LOCAL_FS_ONLY |
STREAM_LESS_NOISE;
bstr dir = mp_dirname(p->real_stream->url);
if (!dir.len)
autocreate = AUTO_NONE;
if (autocreate != AUTO_NONE) {
stream = stream_create(bstrdup0(p, dir), flags, NULL, p->global);
p->pl->playlist_dir = bstrdup0(p->pl, dir);
}
} else {
autocreate = AUTO_NONE;
if (!p->opts->directory_filter || !p->opts->directory_filter[0])
autocreate = AUTO_ANY;
if (str_in_list(bstr0("video"), p->opts->directory_filter))
autocreate |= AUTO_VIDEO;
if (str_in_list(bstr0("audio"), p->opts->directory_filter))
autocreate |= AUTO_AUDIO;
if (str_in_list(bstr0("image"), p->opts->directory_filter))
autocreate |= AUTO_IMAGE;
}
if (!stream->is_directory)
goto done;
if (p->probing) {
ret = 0;
goto done;
}
char *path = mp_file_get_path(p, bstr0(stream->url));
if (!path)
goto done;
if (autocreate == AUTO_NONE)
goto done;
struct stat dir_stack[MAX_DIR_STACK];
if (p->opts->dir_mode == DIR_AUTO) {
struct MPOpts *opts = mp_get_config_group(NULL, p->global, &mp_opt_root);
p->opts->dir_mode = opts->shuffle ? DIR_RECURSIVE : DIR_LAZY;
talloc_free(opts);
}
scan_dir(p, path, dir_stack, 0, autocreate);
p->add_base = false;
ret = p->pl->num_entries > 0 ? 0 : -1;
done:
if (stream != p->real_stream)
free_stream(stream);
return ret;
}
#define MIME_TYPES(...) \
.mime_types = (const char*const[]){__VA_ARGS__, NULL}
struct pl_format {
const char *name;
int (*parse)(struct pl_parser *p);
const char *const *mime_types;
};
static const struct pl_format dir_formats[] = {
{"directory", parse_dir},
{0},
};
static const struct pl_format playlist_formats[] = {
{"m3u", parse_m3u,
MIME_TYPES("audio/mpegurl", "audio/x-mpegurl", "application/x-mpegurl")},
{"ini", parse_ref_init},
{"pls", parse_pls,
MIME_TYPES("audio/x-scpls")},
{"url", parse_url},
{"txt", parse_txt},
{0},
};
static const struct pl_format *probe_pl(struct pl_parser *p, const struct pl_format *fmts)
{
int64_t start = stream_tell(p->s);
const struct pl_format *fmt = fmts;
while (fmt->name) {
stream_seek(p->s, start);
if (check_mimetype(p->s, fmt->mime_types)) {
MP_VERBOSE(p, "forcing format by mime-type.\n");
p->force = true;
return fmt;
}
if (fmt->parse(p) >= 0)
return fmt;
fmt++;
}
return NULL;
}
extern const demuxer_desc_t demuxer_desc_playlist;
extern const demuxer_desc_t demuxer_desc_directory;
static int open_file(struct demuxer *demuxer, enum demux_check check)
{
if (!demuxer->access_references)
return -1;
bool force = check < DEMUX_CHECK_UNSAFE || check == DEMUX_CHECK_REQUEST;
struct pl_parser *p = talloc_zero(NULL, struct pl_parser);
p->global = demuxer->global;
p->log = demuxer->log;
p->pl = talloc_zero(p, struct playlist);
p->real_stream = demuxer->stream;
p->add_base = true;
struct demux_opts *opts = mp_get_config_group(p, p->global, &demux_conf);
p->codepage = opts->meta_cp;
char probe[PROBE_SIZE];
int probe_len = stream_read_peek(p->real_stream, probe, sizeof(probe));
p->s = stream_memory_open(demuxer->global, probe, probe_len);
p->s->mime_type = demuxer->stream->mime_type;
p->utf16 = stream_skip_bom(p->s);
p->force = force;
p->check_level = check;
p->probing = true;
p->autocreate_playlist = demuxer->params->allow_playlist_create ? opts->autocreate_playlist : 0;
p->mp_opts = mp_get_config_group(demuxer, demuxer->global, &mp_opt_root);
p->opts = mp_get_config_group(demuxer, demuxer->global, &demux_playlist_conf);
const struct pl_format *fmts = playlist_formats;
if (demuxer->desc == &demuxer_desc_directory)
fmts = dir_formats;
const struct pl_format *fmt = probe_pl(p, fmts);
free_stream(p->s);
playlist_clear(p->pl);
if (!fmt) {
talloc_free(p);
return -1;
}
p->probing = false;
p->error = false;
p->s = demuxer->stream;
p->utf16 = stream_skip_bom(p->s);
bool ok = fmt->parse(p) >= 0 && !p->error;
if (p->add_base) {
bstr proto = mp_split_proto(bstr0(demuxer->filename), NULL);
// Don't add base path to self-expanding protocols
if (bstrcasecmp0(proto, "memory") && bstrcasecmp0(proto, "lavf") &&
bstrcasecmp0(proto, "hex"))
{
playlist_add_base_path(p->pl, mp_dirname(demuxer->filename));
}
}
playlist_set_stream_flags(p->pl, demuxer->stream_origin);
demuxer->playlist = talloc_steal(demuxer, p->pl);
demuxer->filetype = p->format ? p->format : fmt->name;
demuxer->fully_read = true;
talloc_free(p);
if (ok)
demux_close_stream(demuxer);
return ok ? 0 : -1;
}
const demuxer_desc_t demuxer_desc_directory = {
.name = "directory",
.desc = "Playlist dir",
.open = open_file,
};
const demuxer_desc_t demuxer_desc_playlist = {
.name = "playlist",
.desc = "Playlist file",
.open = open_file,
};
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