Added opus encoder and decoder

README.rst

@@ -18,6 +18,7 @@ Requirements
 - python 3
 - `mutagen`_ python library for tag read/write
 - `vorbis tools`_ for ``ogg`` files encode/decode
+- `opus tools`_ for ``opus`` files encode/decode
 - `lame`_ for ``mp3`` files encode/decode
 - `flac`_ for ``flac`` files decode
 - `mac`_ for ``Monkey audio codecs``/``ape`` files decode
@@ -37,16 +38,19 @@ Conversion can be performed from the following formats:
 - WavePack
 - Ape
 - Ogg Vorbis
+- Ogg Opus
 
 Currently supported encoders:
 
 - Ogg Vorbis
+- Ogg Opus
 - MP3 (lame)
 
-There is an option to set the quality for the encoders - for *Ogg* files there
+There is an option to set the quality for the encoders - for *Vorbis* files
-would be used an ``-q`` option for ``oggenc`` command, and for the *mp3*
+there would be used an ``-q`` option for ``oggenc`` command, for the *mp3*
-format, ``-V`` option would be used for ``lame`` command. Consult corresponding
+format ``-V`` option would be used for ``lame`` command and ``--bitrate`` for
-man pages for details.
+``opusenc`` for the *Opus* files. Consult corresponding encoder man pages for
+details.
 
 Usage
 =====
@@ -57,7 +61,7 @@ Given that there are couple of music files, simplest usage is as follows:
 
    $ flac2ogg.py directory_of_music_files/*
 
-All files from that directory will be encoded to *ogg* by defaults. If there
+All files from that directory will be encoded to *ogg* by default. If there
 are already some *ogg* files, new files would have ``_encoded_`` added into the
 filename. Note, that output files will be placed next to the original files.
 
@@ -69,6 +73,7 @@ This work is licensed on 3-clause BSD license. See LICENSE file for details.
 
 .. _mutagen: https://mutagen.readthedocs.io/en/latest/
 .. _vorbis tools: http://www.vorbis.com/
+.. _opus tools: https://opus-codec.org
 .. _flac: http://www.vorbis.com/
 .. _lame: http://lame.sourceforge.net/
 .. _mac: http://www.deb-multimedia.org/dists/testing/main/binary-amd64/package/monkeys-audio.php

flac2ogg.py

@@ -147,6 +147,21 @@ class Mp3Encoder(Encoder):
         sp.check_call(["lame", f"-V{self.quality}", input_fname, output_fname])
 
 
+class OpusEncoder(Encoder):
+    """Opus encoder"""
+    EXT = ".opus"
+
+    def __init__(self, quality=None):
+        """Init"""
+        super().__init__(quality)
+        if self.quality is None:
+            self.quality = 128
+
+    def encode(self, input_fname, output_fname):
+        sp.check_call(["opusenc", "--bitrate", self.quality, input_fname,
+                       output_fname])
+
+
 class FileType:
     """Base class for file objects"""
     extensions = {'ogg': '.ogg',
@@ -333,6 +348,14 @@ class OggType(FileType):
         sp.check_call(["oggdec", self.filename])
 
 
+class OpusType(FileType):
+    """Opus filetype"""
+
+    def extract_wav(self):
+        """Extract opus file to wav"""
+        sp.check_call(["opusdec", self.filename])
+
+
 class Converter:
     """Main class for converting files"""
     extract_map = {'.ape': ApeType,
@@ -341,6 +364,7 @@ class Converter:
                    '.mp3': Mp3Type,
                    '.mpc': MusepackType,
                    '.ogg': OggType,
+                   '.opus': OpusType,
                    '.wav': WavType,
                    '.wv': WvType}
 
@@ -424,7 +448,8 @@ class Converter:
 
 
 ENCODERS = {'ogg': OggEncoder,
-            'mp3': Mp3Encoder}
+            'mp3': Mp3Encoder,
+            'opus': OpusEncoder}
 
 
 def main():
@@ -436,11 +461,12 @@ def main():
     arg.add_argument('-r', '--recursive', action='store_true',
                      help='Do the files searching recursive')
     arg.add_argument('-e', '--encoder', default='ogg', type=str,
-                     choices=('ogg', 'mp3'), help='Encoder to use. Defaults '
+                     choices=('ogg', 'mp3', 'opus'),
-                     'to "ogg"')
+                     help='Encoder to use. Defaults to "ogg"')
     arg.add_argument('-q', '--quality', help='Quality of the encoded file. '
-                     'Consult "lame" and "oggenc" for details. Defaults are '
+                     'Consult "lame", "oggenc" and "opusenc" manuals for '
-                     '6 for lame and 8 for oggenc.')
+                     'details. Defaults are -V6 for lame, -q8 for oggenc and '
+                     '--bitrate 128 for opusenc')
     arg.add_argument('-v', '--version', action='version',
                      version='%(prog)s v' + VERSION,
                      help='Display version and exit.')