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authorMax Kellermann <max@duempel.org>2013-12-29 16:34:16 +0100
committerMax Kellermann <max@duempel.org>2013-12-29 18:15:30 +0100
commitb5f3bfce92b42ad3b6c7f5f37ea1b8a23616f87f (patch)
treef447e6931100cc94f18befc52bf2fddce9f6c23f /src
parentaeb2baa495776d9fc06e63f91167c40c334303c8 (diff)
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SongUpdate: read tags from songs in an archive
Add the TagStream.cxx library, similar to TagFile.cxx, and use it to load tags from song files inside archives.
Diffstat (limited to '')
-rw-r--r--src/SongUpdate.cxx14
-rw-r--r--src/TagStream.cxx78
-rw-r--r--src/TagStream.hxx41
3 files changed, 128 insertions, 5 deletions
diff --git a/src/SongUpdate.cxx b/src/SongUpdate.cxx
index 1e1bb2ff5..fd4aa6751 100644
--- a/src/SongUpdate.cxx
+++ b/src/SongUpdate.cxx
@@ -32,6 +32,7 @@
#include "tag/TagId3.hxx"
#include "tag/ApeTag.hxx"
#include "TagFile.hxx"
+#include "TagStream.hxx"
#include <assert.h>
#include <string.h>
@@ -119,12 +120,15 @@ Song::UpdateFileInArchive()
if (!decoder_plugins_supports_suffix(suffix))
return false;
- delete tag;
+ const auto path_fs = map_song_fs(*this);
+ if (path_fs.IsNull())
+ return false;
- //accept every file that has music suffix
- //because we don't support tag reading through
- //input streams
- tag = new Tag();
+ TagBuilder tag_builder;
+ if (!tag_stream_scan(path_fs.c_str(), full_tag_handler, &tag_builder))
+ return false;
+ delete tag;
+ tag = tag_builder.Commit();
return true;
}
diff --git a/src/TagStream.cxx b/src/TagStream.cxx
new file mode 100644
index 000000000..8fc1f3312
--- /dev/null
+++ b/src/TagStream.cxx
@@ -0,0 +1,78 @@
+/*
+ * 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 "TagStream.hxx"
+#include "util/UriUtil.hxx"
+#include "util/Error.hxx"
+#include "DecoderList.hxx"
+#include "DecoderPlugin.hxx"
+#include "InputStream.hxx"
+#include "thread/Mutex.hxx"
+#include "thread/Cond.hxx"
+
+#include <assert.h>
+
+/**
+ * Does the #DecoderPlugin support either the suffix or the MIME type?
+ */
+gcc_pure
+static bool
+CheckDecoderPlugin(const DecoderPlugin &plugin,
+ const char *suffix, const char *mime)
+{
+ return (mime != nullptr && plugin.SupportsMimeType(mime)) ||
+ (suffix != nullptr && plugin.SupportsSuffix(suffix));
+}
+
+bool
+tag_stream_scan(InputStream &is, const tag_handler &handler, void *ctx)
+{
+ assert(is.ready);
+
+ const char *const suffix = uri_get_suffix(is.uri.c_str());
+ const char *const mime = is.mime.empty() ? nullptr : is.mime.c_str();
+
+ if (suffix == nullptr && mime == nullptr)
+ return false;
+
+ return decoder_plugins_try([suffix, mime, &is,
+ &handler, ctx](const DecoderPlugin &plugin){
+ is.LockRewind(IgnoreError());
+
+ return CheckDecoderPlugin(plugin, suffix, mime) &&
+ plugin.ScanStream(is, handler, ctx);
+ });
+}
+
+bool
+tag_stream_scan(const char *uri, const tag_handler &handler, void *ctx)
+{
+ Mutex mutex;
+ Cond cond;
+
+ InputStream *is = InputStream::OpenReady(uri, mutex, cond,
+ IgnoreError());
+ if (is == nullptr)
+ return false;
+
+ bool success = tag_stream_scan(*is, handler, ctx);
+ is->Close();
+ return success;
+}
diff --git a/src/TagStream.hxx b/src/TagStream.hxx
new file mode 100644
index 000000000..8fe7d4101
--- /dev/null
+++ b/src/TagStream.hxx
@@ -0,0 +1,41 @@
+/*
+ * 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.
+ */
+
+#ifndef MPD_TAG_STREAM_HXX
+#define MPD_TAG_STREAM_HXX
+
+#include "check.h"
+
+struct InputStream;
+struct tag_handler;
+
+/**
+ * Scan the tags of an #InputStream. Invokes matching decoder
+ * plugins, but does not invoke the special "APE" and "ID3" scanners.
+ *
+ * @return true if the file was recognized (even if no metadata was
+ * found)
+ */
+bool
+tag_stream_scan(InputStream &is, const tag_handler &handler, void *ctx);
+
+bool
+tag_stream_scan(const char *uri, const tag_handler &handler, void *ctx);
+
+#endif