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/*
* Copyright 2003-2020 The Music Player Daemon Project
* http://www.musicpd.org
*
* This program 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.
*
* This program 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 this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "ExtM3uPlaylistPlugin.hxx"
#include "../PlaylistPlugin.hxx"
#include "../SongEnumerator.hxx"
#include "song/DetachedSong.hxx"
#include "tag/Tag.hxx"
#include "tag/Builder.hxx"
#include "util/StringStrip.hxx"
#include "util/StringCompare.hxx"
#include "input/TextInputStream.hxx"
#include "input/InputStream.hxx"
#include <string.h>
#include <stdlib.h>
class ExtM3uPlaylist final : public SongEnumerator {
TextInputStream tis;
public:
ExtM3uPlaylist(InputStreamPtr &&is)
:tis(std::move(is)) {
}
/**
* @return nullptr if ExtM3U was recognized, or the original
* InputStream on error
*/
InputStreamPtr CheckFirstLine() {
char *line = tis.ReadLine();
if (line == nullptr)
return tis.StealInputStream();
StripRight(line);
if (strcmp(line, "#EXTM3U") != 0)
return tis.StealInputStream();
return nullptr;
}
std::unique_ptr<DetachedSong> NextSong() override;
};
static std::unique_ptr<SongEnumerator>
extm3u_open_stream(InputStreamPtr &&is)
{
auto playlist = std::make_unique<ExtM3uPlaylist>(std::move(is));
is = playlist->CheckFirstLine();
if (is)
/* no EXTM3U header: fall back to the plain m3u
plugin */
playlist.reset();
return playlist;
}
/**
* Parse a EXTINF line.
*
* @param line the rest of the input line after the colon
*/
static Tag
extm3u_parse_tag(const char *line)
{
long duration;
char *endptr;
const char *name;
duration = strtol(line, &endptr, 10);
if (endptr[0] != ',')
/* malformed line */
return Tag();
if (duration < 0)
/* 0 means unknown duration */
duration = 0;
name = StripLeft(endptr + 1);
if (*name == 0 && duration == 0)
/* no information available; don't allocate a tag
object */
return Tag();
TagBuilder tag;
tag.SetDuration(SignedSongTime::FromS(unsigned(duration)));
/* unfortunately, there is no real specification for the
EXTM3U format, so we must assume that the string after the
comma is opaque, and is just the song name*/
if (*name != 0)
tag.AddItem(TAG_NAME, name);
return tag.Commit();
}
std::unique_ptr<DetachedSong>
ExtM3uPlaylist::NextSong()
{
Tag tag;
char *line_s;
do {
line_s = tis.ReadLine();
if (line_s == nullptr)
return nullptr;
StripRight(line_s);
if (StringStartsWith(line_s, "#EXTINF:")) {
tag = extm3u_parse_tag(line_s + 8);
continue;
}
line_s = StripLeft(line_s);
} while (line_s[0] == '#' || *line_s == 0);
return std::make_unique<DetachedSong>(line_s, std::move(tag));
}
static const char *const extm3u_suffixes[] = {
"m3u",
"m3u8",
nullptr
};
static const char *const extm3u_mime_types[] = {
"audio/x-mpegurl",
"audio/mpegurl",
nullptr
};
const PlaylistPlugin extm3u_playlist_plugin =
PlaylistPlugin("extm3u", extm3u_open_stream)
.WithSuffixes(extm3u_suffixes)
.WithMimeTypes(extm3u_mime_types);
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