Move to a new emms-print-metadata.

The new emms-print-metadata is written in C++ and brings on board new
features from TagLib.

Patch by Petteri Hintsanen <petterih@iki.fi>.

1 files changed, 112 insertions, 0 deletions

diff --git a/src/emms-print-metadata.cpp b/src/emms-print-metadata.cpp
new file mode 100644
index 0000000..7283657
--- /dev/null
+++ b/src/emms-print-metadata.cpp
@@ -0,0 +1,112 @@
+/* emms-print-metadata.cpp --- Info function for TagLib
+   Copyright (C) 2016  Free Software Foundation, Inc.
+
+   Author: Petteri Hintsanen <petterih@iki.fi>
+
+   This file is part of EMMS.
+
+   EMMS 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 3, or (at your option)
+   any later version.
+
+   EMMS 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 EMMS; see the file COPYING.  If not, write to
+   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+   Boston, MA 02110-1301, USA.  */
+
+#include <taglib/fileref.h>
+#include <taglib/tag.h>
+#include <taglib/tpropertymap.h>
+#include <iostream>
+
+static const char* const tags_to_extract[] = {
+  "album",
+  "albumsort",
+  "albumartist",
+  "albumartistsort",
+  "artist",
+  "artistsort",
+  "composer",
+  "composersort",
+  "performer",
+  "year",
+  "originalyear",
+  "date",
+  "originaldate",
+  "genre",
+  "label",
+  "title",
+  "titlesort",
+  "tracknumber",
+  "discnumber"
+};
+
+void print_tag (const TagLib::PropertyMap& tags, const std::string& tag);
+
+int
+main (int argc, char* argv[])
+{
+  if (argc != 2)
+    {
+      std::cerr << argv[0] << ": "
+		<< "usage: emms-print-metadata FILENAME"
+		<< std::endl
+		<< "FILENAME must end to one of these extensions: "
+		<< TagLib::FileRef::defaultFileExtensions ().toString ()
+		<< std::endl;
+      return 1;
+    }
+
+  TagLib::FileRef file (argv[1]);
+  if (file.isNull ()) {
+    std::cerr << argv[0] << ": "
+	      << argv[1] << ": "
+	      << "file does not exist or is of an unknown type"
+	      << std::endl;
+    return 1;
+  }
+
+  const TagLib::PropertyMap tags = file.file ()->properties ();
+  if (tags.isEmpty ()) {
+    std::cerr << argv[0] << ": "
+	      << argv[1] << ": "
+	      << "file does not have tags or is of an unknown type"
+	      << std::endl;
+    return 1;
+  }
+
+  for (unsigned int i = 0; i < sizeof (tags_to_extract) / sizeof (char*);
+       i++)
+    {
+      print_tag (tags, tags_to_extract[i]);
+    }
+
+  int length = 0;
+  if (file.audioProperties ())
+    {
+      const TagLib::AudioProperties* properties = file.audioProperties ();
+      length = properties->length ();
+    }
+  std::cout << "info-playing-time=" << length << std::endl;
+
+  return 0;
+}
+
+void
+print_tag (const TagLib::PropertyMap& tags, const std::string& tag)
+{
+  TagLib::StringList values = tags[tag];
+  if (!values.isEmpty ())
+    {
+      const TagLib::String& value = values.front ();
+      std::cout << "info-" << tag << "=" << value.to8Bit (true) << std::endl;
+    }
+}
+
+/* emms-print-taglib-metadata.cpp ends here. */