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/*
* Copyright 2003-2021 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 "SongSave.hxx"
#include "pcm/AudioParser.hxx"
#include "db/plugins/simple/Song.hxx"
#include "song/DetachedSong.hxx"
#include "TagSave.hxx"
#include "fs/io/TextFile.hxx"
#include "fs/io/BufferedOutputStream.hxx"
#include "tag/ParseName.hxx"
#include "tag/Tag.hxx"
#include "tag/Builder.hxx"
#include "time/ChronoUtil.hxx"
#include "util/StringAPI.hxx"
#include "util/StringBuffer.hxx"
#include "util/StringStrip.hxx"
#include "util/RuntimeError.hxx"
#include "util/NumberParser.hxx"
#include <stdlib.h>
#define SONG_MTIME "mtime"
#define SONG_END "song_end"
static void
range_save(BufferedOutputStream &os, unsigned start_ms, unsigned end_ms)
{
if (end_ms > 0)
os.Format("Range: %u-%u\n", start_ms, end_ms);
else if (start_ms > 0)
os.Format("Range: %u-\n", start_ms);
}
void
song_save(BufferedOutputStream &os, const Song &song)
{
os.Format(SONG_BEGIN "%s\n", song.filename.c_str());
if (!song.target.empty())
os.Format("Target: %s\n", song.target.c_str());
range_save(os, song.start_time.ToMS(), song.end_time.ToMS());
tag_save(os, song.tag);
if (song.audio_format.IsDefined())
os.Format("Format: %s\n", ToString(song.audio_format).c_str());
if (!IsNegative(song.mtime))
os.Format(SONG_MTIME ": %li\n",
(long)std::chrono::system_clock::to_time_t(song.mtime));
os.Format(SONG_END "\n");
}
void
song_save(BufferedOutputStream &os, const DetachedSong &song)
{
os.Format(SONG_BEGIN "%s\n", song.GetURI());
range_save(os, song.GetStartTime().ToMS(), song.GetEndTime().ToMS());
tag_save(os, song.GetTag());
if (!IsNegative(song.GetLastModified()))
os.Format(SONG_MTIME ": %li\n",
(long)std::chrono::system_clock::to_time_t(song.GetLastModified()));
os.Format(SONG_END "\n");
}
DetachedSong
song_load(TextFile &file, const char *uri,
std::string *target_r)
{
DetachedSong song(uri);
TagBuilder tag;
char *line;
while ((line = file.ReadLine()) != nullptr &&
!StringIsEqual(line, SONG_END)) {
char *colon = std::strchr(line, ':');
if (colon == nullptr || colon == line) {
throw FormatRuntimeError("unknown line in db: %s", line);
}
*colon++ = 0;
const char *value = StripLeft(colon);
TagType type;
if ((type = tag_name_parse(line)) != TAG_NUM_OF_ITEM_TYPES) {
tag.AddItem(type, value);
} else if (StringIsEqual(line, "Time")) {
tag.SetDuration(SignedSongTime::FromS(ParseDouble(value)));
} else if (StringIsEqual(line, "Target")) {
if (target_r != nullptr)
*target_r = value;
} else if (StringIsEqual(line, "Format")) {
try {
song.SetAudioFormat(ParseAudioFormat(value,
false));
} catch (...) {
/* ignore parser errors */
}
} else if (StringIsEqual(line, "Playlist")) {
tag.SetHasPlaylist(StringIsEqual(value, "yes"));
} else if (StringIsEqual(line, SONG_MTIME)) {
song.SetLastModified(std::chrono::system_clock::from_time_t(atoi(value)));
} else if (StringIsEqual(line, "Range")) {
char *endptr;
unsigned start_ms = strtoul(value, &endptr, 10);
unsigned end_ms = *endptr == '-'
? strtoul(endptr + 1, nullptr, 10)
: 0;
song.SetStartTime(SongTime::FromMS(start_ms));
song.SetEndTime(SongTime::FromMS(end_ms));
} else {
throw FormatRuntimeError("unknown line in db: %s", line);
}
}
song.SetTag(tag.Commit());
return song;
}
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