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/*
* Copyright (C) 2003-2013 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 "config.h"
#include "TagFile.hxx"
#include "util/UriUtil.hxx"
#include "util/Error.hxx"
#include "DecoderList.hxx"
#include "DecoderPlugin.hxx"
#include "InputStream.hxx"
#include "thread/Cond.hxx"
#include <assert.h>
#include <unistd.h> /* for SEEK_SET */
bool
tag_file_scan(const char *path_fs,
const struct tag_handler *handler, void *handler_ctx)
{
assert(path_fs != nullptr);
assert(handler != nullptr);
/* check if there's a suffix and a plugin */
const char *suffix = uri_get_suffix(path_fs);
if (suffix == nullptr)
return false;
const struct decoder_plugin *plugin =
decoder_plugin_from_suffix(suffix, nullptr);
if (plugin == nullptr)
return false;
struct input_stream *is = nullptr;
Mutex mutex;
Cond cond;
do {
/* load file tag */
if (decoder_plugin_scan_file(*plugin, path_fs,
handler, handler_ctx))
break;
/* fall back to stream tag */
if (plugin->scan_stream != nullptr) {
/* open the input_stream (if not already
open) */
if (is == nullptr) {
Error error;
is = input_stream::Open(path_fs, mutex, cond,
error);
}
/* now try the stream_tag() method */
if (is != nullptr) {
if (decoder_plugin_scan_stream(*plugin, is,
handler,
handler_ctx))
break;
is->LockSeek(0, SEEK_SET, IgnoreError());
}
}
plugin = decoder_plugin_from_suffix(suffix, plugin);
} while (plugin != nullptr);
if (is != nullptr)
is->Close();
return plugin != nullptr;
}
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