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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 General Public License as published by
* the Free Software Foundation; either version 2 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with mpv. If not, see <http://www.gnu.org/licenses/>.
*/
#include "mpvcore/mp_common.h"
#include "mpvcore/options.h"
#include "mpvcore/mp_msg.h"
#include "mpvcore/playlist.h"
#include "mpvcore/path.h"
#include "stream/stream.h"
#include "demux.h"
#define PROBE_SIZE (8 * 1024)
struct pl_parser {
struct stream *s;
char buffer[8 * 1024];
int utf16;
struct playlist *pl;
bool probing;
};
static char *pl_get_line0(struct pl_parser *p)
{
char *res = stream_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';
}
return res;
}
static bstr pl_get_line(struct pl_parser *p)
{
return bstr0(pl_get_line0(p));
}
static void pl_add(struct pl_parser *p, bstr entry)
{
char *s = bstrto0(NULL, entry);
playlist_add_file(p->pl, s);
talloc_free(s);
}
static bool pl_eof(struct pl_parser *p)
{
return p->s->eof;
}
static int parse_m3u(struct pl_parser *p)
{
bstr line = bstr_strip(pl_get_line(p));
if (!bstr_equals0(line, "#EXTM3U"))
return -1;
if (p->probing)
return 0;
while (!pl_eof(p)) {
line = bstr_lstrip(pl_get_line(p));
if (line.len == 0 || bstr_startswith0(line, "#"))
continue;
pl_add(p, line);
}
return 0;
}
struct pl_format {
const char *name;
int (*parse)(struct pl_parser *p);
};
static const struct pl_format formats[] = {
{"m3u", parse_m3u},
};
static const struct pl_format *probe_pl(struct pl_parser *p, bool force)
{
int64_t start = stream_tell(p->s);
for (int n = 0; n < MP_ARRAY_SIZE(formats); n++) {
const struct pl_format *fmt = &formats[n];
stream_seek(p->s, start);
if (fmt->parse(p) >= 0)
return fmt;
}
return NULL;
}
static int open_file(struct demuxer *demuxer, enum demux_check check)
{
bool force = check < DEMUX_CHECK_UNSAFE || check == DEMUX_CHECK_REQUEST;
struct pl_parser *p = talloc_zero(NULL, struct pl_parser);
p->pl = talloc_zero(p, struct playlist);
bstr probe_buf = stream_peek(demuxer->stream, PROBE_SIZE);
p->s = open_memory_stream(probe_buf.start, probe_buf.len);
p->utf16 = stream_skip_bom(p->s);
p->probing = true;
const struct pl_format *fmt = probe_pl(p, force);
free_stream(p->s);
playlist_clear(p->pl);
if (!fmt) {
talloc_free(p);
return -1;
}
p->probing = false;
p->s = demuxer->stream;
p->utf16 = stream_skip_bom(p->s);
bool ok = fmt->parse(p) >= 0;
if (ok)
playlist_add_base_path(p->pl, mp_dirname(demuxer->filename));
demuxer->playlist = talloc_steal(demuxer, p->pl);
demuxer->filetype = fmt->name;
talloc_free(p);
return ok ? 0 : -1;
}
const struct demuxer_desc demuxer_desc_playlist = {
.name = "playlist",
.desc = "Playlist file",
.open = open_file,
};
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