mirror of
https://github.com/mpv-player/mpv
synced 2024-12-23 23:32:26 +00:00
582f3f7cc0
Although a linked list was ideal at first, there are cases where it sucks, and became increasingly awkward (with the mpv command API preferring integer indexes to access the list). In future, we probably want to add more playlist-related functionality, so better change it to an array now. An array isn't always ideal either. Since playlist entries are still separate objects (because in some cases you need a stable "iterator" to it), but you still need to efficiently get the next/previous playlist entry, there's a pl_index field, that needs to be maintained. E.g. adding an entry at the start of the playlist => update the pl_index field for all other entries. Well, it's not really worth to do something more complicated to avoid these things. This commit is probably buggy as shit. It's not like I bothered to test everything. That's _your_ role.
480 lines
14 KiB
C
480 lines
14 KiB
C
/*
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* This file is part of mpv.
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*
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* mpv is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* mpv is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with mpv. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdlib.h>
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#include <string.h>
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#include <strings.h>
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#include <dirent.h>
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#include <libavutil/common.h>
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#include "config.h"
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#include "common/common.h"
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#include "options/options.h"
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#include "common/msg.h"
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#include "common/playlist.h"
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#include "misc/thread_tools.h"
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#include "options/path.h"
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#include "stream/stream.h"
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#include "osdep/io.h"
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#include "misc/natural_sort.h"
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#include "demux.h"
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#define PROBE_SIZE (8 * 1024)
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static bool check_mimetype(struct stream *s, const char *const *list)
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{
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if (s->mime_type) {
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for (int n = 0; list && list[n]; n++) {
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if (strcasecmp(s->mime_type, list[n]) == 0)
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return true;
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}
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}
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return false;
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}
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struct pl_parser {
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struct mp_log *log;
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struct stream *s;
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char buffer[512 * 1024];
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int utf16;
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struct playlist *pl;
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bool error;
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bool probing;
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bool force;
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bool add_base;
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enum demux_check check_level;
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struct stream *real_stream;
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char *format;
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};
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static uint16_t stream_read_word_endian(stream_t *s, bool big_endian)
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{
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unsigned int y = stream_read_char(s);
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y = (y << 8) | stream_read_char(s);
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if (!big_endian)
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y = ((y >> 8) & 0xFF) | (y << 8);
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return y;
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}
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// Read characters until the next '\n' (including), or until the buffer in s is
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// exhausted.
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static int read_characters(stream_t *s, uint8_t *dst, int dstsize, int utf16)
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{
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if (utf16 == 1 || utf16 == 2) {
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uint8_t *cur = dst;
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while (1) {
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if ((cur - dst) + 8 >= dstsize) // PUT_UTF8 writes max. 8 bytes
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return -1; // line too long
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uint32_t c;
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uint8_t tmp;
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GET_UTF16(c, stream_read_word_endian(s, utf16 == 2), return -1;)
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if (s->eof)
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break; // legitimate EOF; ignore the case of partial reads
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PUT_UTF8(c, tmp, *cur++ = tmp;)
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if (c == '\n')
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break;
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}
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return cur - dst;
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} else {
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uint8_t buf[1024];
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int buf_len = stream_read_peek(s, buf, sizeof(buf));
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uint8_t *end = memchr(buf, '\n', buf_len);
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int len = end ? end - buf + 1 : buf_len;
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if (len > dstsize)
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return -1; // line too long
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memcpy(dst, buf, len);
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stream_seek_skip(s, stream_tell(s) + len);
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return len;
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}
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}
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// On error, or if the line is larger than max-1, return NULL and unset s->eof.
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// On EOF, return NULL, and s->eof will be set.
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// Otherwise, return the line (including \n or \r\n at the end of the line).
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// If the return value is non-NULL, it's always the same as mem.
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// utf16: 0: UTF8 or 8 bit legacy, 1: UTF16-LE, 2: UTF16-BE
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static char *read_line(stream_t *s, char *mem, int max, int utf16)
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{
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if (max < 1)
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return NULL;
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int read = 0;
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while (1) {
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// Reserve 1 byte of ptr for terminating \0.
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int l = read_characters(s, &mem[read], max - read - 1, utf16);
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if (l < 0 || memchr(&mem[read], '\0', l)) {
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MP_WARN(s, "error reading line\n");
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return NULL;
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}
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read += l;
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if (l == 0 || (read > 0 && mem[read - 1] == '\n'))
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break;
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}
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mem[read] = '\0';
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if (!stream_read_peek(s, &(char){0}, 1) && read == 0) // legitimate EOF
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return NULL;
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return mem;
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}
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static char *pl_get_line0(struct pl_parser *p)
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{
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char *res = read_line(p->s, p->buffer, sizeof(p->buffer), p->utf16);
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if (res) {
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int len = strlen(res);
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if (len > 0 && res[len - 1] == '\n')
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res[len - 1] = '\0';
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} else {
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p->error |= !p->s->eof;
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}
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return res;
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}
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static bstr pl_get_line(struct pl_parser *p)
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{
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return bstr0(pl_get_line0(p));
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}
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static void pl_add(struct pl_parser *p, bstr entry)
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{
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char *s = bstrto0(NULL, entry);
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playlist_add_file(p->pl, s);
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talloc_free(s);
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}
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static bool pl_eof(struct pl_parser *p)
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{
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return p->error || p->s->eof;
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}
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static bool maybe_text(bstr d)
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{
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for (int n = 0; n < d.len; n++) {
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unsigned char c = d.start[n];
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if (c < 32 && c != '\n' && c != '\r' && c != '\t')
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return false;
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}
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return true;
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}
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static int parse_m3u(struct pl_parser *p)
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{
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bstr line = bstr_strip(pl_get_line(p));
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if (p->probing && !bstr_equals0(line, "#EXTM3U")) {
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// Last resort: if the file extension is m3u, it might be headerless.
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if (p->check_level == DEMUX_CHECK_UNSAFE) {
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char *ext = mp_splitext(p->real_stream->url, NULL);
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char probe[PROBE_SIZE];
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int len = stream_read_peek(p->real_stream, probe, sizeof(probe));
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bstr data = {probe, len};
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if (ext && data.len > 10 && maybe_text(data)) {
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const char *exts[] = {"m3u", "m3u8", NULL};
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for (int n = 0; exts[n]; n++) {
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if (strcasecmp(ext, exts[n]) == 0)
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goto ok;
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}
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}
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}
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return -1;
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}
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ok:
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if (p->probing)
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return 0;
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char *title = NULL;
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while (line.len || !pl_eof(p)) {
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if (bstr_eatstart0(&line, "#EXTINF:")) {
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bstr duration, btitle;
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if (bstr_split_tok(line, ",", &duration, &btitle) && btitle.len) {
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talloc_free(title);
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title = bstrto0(NULL, btitle);
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}
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} else if (bstr_startswith0(line, "#EXT-X-")) {
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p->format = "hls";
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} else if (line.len > 0 && !bstr_startswith0(line, "#")) {
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char *fn = bstrto0(NULL, line);
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struct playlist_entry *e = playlist_entry_new(fn);
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talloc_free(fn);
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e->title = talloc_steal(e, title);
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title = NULL;
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playlist_add(p->pl, e);
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}
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line = bstr_strip(pl_get_line(p));
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}
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talloc_free(title);
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return 0;
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}
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static int parse_ref_init(struct pl_parser *p)
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{
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bstr line = bstr_strip(pl_get_line(p));
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if (!bstr_equals0(line, "[Reference]"))
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return -1;
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// ASF http streaming redirection - this is needed because ffmpeg http://
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// and mmsh:// can not automatically switch automatically between each
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// others. Both protocols use http - MMSH requires special http headers
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// to "activate" it, and will in other cases return this playlist.
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static const char *const mmsh_types[] = {"audio/x-ms-wax",
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"audio/x-ms-wma", "video/x-ms-asf", "video/x-ms-afs", "video/x-ms-wmv",
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"video/x-ms-wma", "application/x-mms-framed",
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"application/vnd.ms.wms-hdr.asfv1", NULL};
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bstr burl = bstr0(p->s->url);
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if (bstr_eatstart0(&burl, "http://") && check_mimetype(p->s, mmsh_types)) {
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MP_INFO(p, "Redirecting to mmsh://\n");
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playlist_add_file(p->pl, talloc_asprintf(p, "mmsh://%.*s", BSTR_P(burl)));
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return 0;
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}
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while (!pl_eof(p)) {
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line = bstr_strip(pl_get_line(p));
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if (bstr_case_startswith(line, bstr0("Ref"))) {
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bstr_split_tok(line, "=", &(bstr){0}, &line);
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if (line.len)
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pl_add(p, line);
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}
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}
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return 0;
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}
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static int parse_ini_thing(struct pl_parser *p, const char *header,
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const char *entry)
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{
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bstr line = {0};
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while (!line.len && !pl_eof(p))
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line = bstr_strip(pl_get_line(p));
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if (bstrcasecmp0(line, header) != 0)
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return -1;
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if (p->probing)
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return 0;
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while (!pl_eof(p)) {
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line = bstr_strip(pl_get_line(p));
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bstr key, value;
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if (bstr_split_tok(line, "=", &key, &value) &&
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bstr_case_startswith(key, bstr0(entry)))
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{
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value = bstr_strip(value);
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if (bstr_startswith0(value, "\"") && bstr_endswith0(value, "\""))
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value = bstr_splice(value, 1, -1);
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pl_add(p, value);
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}
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}
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return 0;
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}
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static int parse_pls(struct pl_parser *p)
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{
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return parse_ini_thing(p, "[playlist]", "File");
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}
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static int parse_url(struct pl_parser *p)
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{
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return parse_ini_thing(p, "[InternetShortcut]", "URL");
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}
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static int parse_txt(struct pl_parser *p)
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{
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if (!p->force)
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return -1;
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if (p->probing)
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return 0;
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MP_WARN(p, "Reading plaintext playlist.\n");
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while (!pl_eof(p)) {
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bstr line = bstr_strip(pl_get_line(p));
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if (line.len == 0)
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continue;
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pl_add(p, line);
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}
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return 0;
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}
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#define MAX_DIR_STACK 20
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static bool same_st(struct stat *st1, struct stat *st2)
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{
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return st1->st_dev == st2->st_dev && st1->st_ino == st2->st_ino;
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}
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// Return true if this was a readable directory.
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static bool scan_dir(struct pl_parser *p, char *path,
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struct stat *dir_stack, int num_dir_stack,
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char ***files, int *num_files)
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{
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if (strlen(path) >= 8192 || num_dir_stack == MAX_DIR_STACK)
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return false; // things like mount bind loops
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DIR *dp = opendir(path);
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if (!dp) {
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MP_ERR(p, "Could not read directory.\n");
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return false;
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}
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struct dirent *ep;
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while ((ep = readdir(dp))) {
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if (ep->d_name[0] == '.')
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continue;
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if (mp_cancel_test(p->s->cancel))
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break;
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char *file = mp_path_join(p, path, ep->d_name);
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struct stat st;
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if (stat(file, &st) == 0 && S_ISDIR(st.st_mode)) {
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for (int n = 0; n < num_dir_stack; n++) {
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if (same_st(&dir_stack[n], &st)) {
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MP_VERBOSE(p, "Skip recursive entry: %s\n", file);
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goto skip;
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}
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}
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dir_stack[num_dir_stack] = st;
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scan_dir(p, file, dir_stack, num_dir_stack + 1, files, num_files);
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} else {
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MP_TARRAY_APPEND(p, *files, *num_files, file);
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}
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skip: ;
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}
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closedir(dp);
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return true;
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}
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static int cmp_filename(const void *a, const void *b)
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{
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return mp_natural_sort_cmp(*(char **)a, *(char **)b);
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}
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static int parse_dir(struct pl_parser *p)
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{
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if (!p->real_stream->is_directory)
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return -1;
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if (p->probing)
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return 0;
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char *path = mp_file_get_path(p, bstr0(p->real_stream->url));
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if (!path)
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return -1;
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char **files = NULL;
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int num_files = 0;
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struct stat dir_stack[MAX_DIR_STACK];
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scan_dir(p, path, dir_stack, 0, &files, &num_files);
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if (files)
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qsort(files, num_files, sizeof(files[0]), cmp_filename);
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for (int n = 0; n < num_files; n++)
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playlist_add_file(p->pl, files[n]);
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p->add_base = false;
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return num_files > 0 ? 0 : -1;
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}
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#define MIME_TYPES(...) \
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.mime_types = (const char*const[]){__VA_ARGS__, NULL}
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struct pl_format {
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const char *name;
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int (*parse)(struct pl_parser *p);
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const char *const *mime_types;
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};
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static const struct pl_format formats[] = {
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{"directory", parse_dir},
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{"m3u", parse_m3u,
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MIME_TYPES("audio/mpegurl", "audio/x-mpegurl", "application/x-mpegurl")},
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{"ini", parse_ref_init},
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{"pls", parse_pls,
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MIME_TYPES("audio/x-scpls")},
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{"url", parse_url},
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{"txt", parse_txt},
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};
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static const struct pl_format *probe_pl(struct pl_parser *p)
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{
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int64_t start = stream_tell(p->s);
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for (int n = 0; n < MP_ARRAY_SIZE(formats); n++) {
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const struct pl_format *fmt = &formats[n];
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stream_seek(p->s, start);
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if (check_mimetype(p->s, fmt->mime_types)) {
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MP_VERBOSE(p, "forcing format by mime-type.\n");
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p->force = true;
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return fmt;
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}
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if (fmt->parse(p) >= 0)
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return fmt;
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}
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return NULL;
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}
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static int open_file(struct demuxer *demuxer, enum demux_check check)
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{
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if (!demuxer->access_references)
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return -1;
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bool force = check < DEMUX_CHECK_UNSAFE || check == DEMUX_CHECK_REQUEST;
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struct pl_parser *p = talloc_zero(NULL, struct pl_parser);
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p->log = demuxer->log;
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p->pl = talloc_zero(p, struct playlist);
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p->real_stream = demuxer->stream;
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p->add_base = true;
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char probe[PROBE_SIZE];
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int probe_len = stream_read_peek(p->real_stream, probe, sizeof(probe));
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p->s = stream_memory_open(demuxer->global, probe, probe_len);
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p->s->mime_type = demuxer->stream->mime_type;
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p->utf16 = stream_skip_bom(p->s);
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p->force = force;
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p->check_level = check;
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p->probing = true;
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const struct pl_format *fmt = probe_pl(p);
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free_stream(p->s);
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playlist_clear(p->pl);
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if (!fmt) {
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talloc_free(p);
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return -1;
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}
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p->probing = false;
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p->error = false;
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p->s = demuxer->stream;
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p->utf16 = stream_skip_bom(p->s);
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bool ok = fmt->parse(p) >= 0 && !p->error;
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if (p->add_base)
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playlist_add_base_path(p->pl, mp_dirname(demuxer->filename));
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playlist_set_stream_flags(p->pl, demuxer->stream_origin);
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demuxer->playlist = talloc_steal(demuxer, p->pl);
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demuxer->filetype = p->format ? p->format : fmt->name;
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demuxer->fully_read = true;
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talloc_free(p);
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if (ok)
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demux_close_stream(demuxer);
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return ok ? 0 : -1;
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}
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const struct demuxer_desc demuxer_desc_playlist = {
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.name = "playlist",
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.desc = "Playlist file",
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.open = open_file,
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};
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