* morituri/common/encode.py (added):

* examples/encode.py (added):
	  Add an Encode Task, hardcoded to flac for now.
	  Add an example, that also sets tags.

ChangeLog

@@ -1,3 +1,10 @@
+2009-05-26  Thomas Vander Stichele  <thomas at apestaart dot org>
+
+	* morituri/common/encode.py (added):
+	* examples/encode.py (added):
+	  Add an Encode Task, hardcoded to flac for now.
+	  Add an example, that also sets tags.
+
 2009-05-26  Thomas Vander Stichele  <thomas at apestaart dot org>
 
 	* morituri/common/task.py:

examples/encode.py

@@ -0,0 +1,98 @@
+# -*- Mode: Python; test-case-name: morituri.test.test_header -*-
+# vi:si:et:sw=4:sts=4:ts=4
+
+# Morituri - for those about to RIP
+
+# Copyright (C) 2009 Thomas Vander Stichele
+
+# This file is part of morituri.
+# 
+# morituri 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 of the License, or
+# (at your option) any later version.
+# 
+# morituri 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 morituri.  If not, see <http://www.gnu.org/licenses/>.
+
+import os
+import sys
+import optparse
+import tempfile
+import pickle
+import shutil
+
+import gobject
+gobject.threads_init()
+
+import gst
+
+import gtk
+
+
+from morituri.common import task, taskgtk, common, encode
+
+def gtkmain(runner, taskk):
+    runner.connect('stop', lambda _: gtk.main_quit())
+
+    window = gtk.Window()
+    window.add(runner)
+    window.show_all()
+
+    runner.run(taskk)
+
+    gtk.main()
+
+def climain(runner, taskk):
+    runner.run(taskk)
+
+class Listener(object):
+    def __init__(self, persister):
+        self._persister = persister
+
+    def progressed(self, task, value):
+        pass
+
+    def described(self, task, description):
+        pass
+
+    def started(self, task):
+        pass
+
+    def stopped(self, task):
+        self._persister.object[task.path] = task.trm
+        print task.path, task.trm
+        self._persister.persist()
+
+
+def main(argv):
+    parser = optparse.OptionParser()
+
+    default = 'cli'
+    parser.add_option('-r', '--runner',
+        action="store", dest="runner",
+        help="runner ('cli' or 'gtk', defaults to %s)" % default,
+        default=default)
+
+    options, args = parser.parse_args(argv[1:])
+
+    taglist = gst.TagList()
+    taglist[gst.TAG_ARTIST] = 'Thomas'
+    taglist[gst.TAG_TITLE] = 'Yes'
+    taskk = encode.EncodeTask(args[0], args[1], taglist=taglist)
+
+    if options.runner == 'cli':
+        runner = task.SyncRunner()
+        function = climain
+    elif options.runner == 'gtk':
+        runner = taskgtk.GtkProgressRunner()
+        function = gtkmain
+
+    function(runner, taskk)
+
+main(sys.argv)

morituri/common/encode.py

@@ -0,0 +1,118 @@
+# -*- Mode: Python; test-case-name: morituri.test.test_common_encode -*-
+# vi:si:et:sw=4:sts=4:ts=4
+
+# Morituri - for those about to RIP
+
+# Copyright (C) 2009 Thomas Vander Stichele
+
+# This file is part of morituri.
+# 
+# morituri 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 of the License, or
+# (at your option) any later version.
+# 
+# morituri 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 morituri.  If not, see <http://www.gnu.org/licenses/>.
+
+import os
+import struct
+import zlib
+
+import gst
+
+from morituri.common import common, task
+
+from morituri.common import log
+log.init()
+
+class EncodeTask(task.Task):
+    """
+    I am a task that encodes a .wav file.
+    I set tags too.
+    """
+
+    description = 'Encoding'
+
+    def __init__(self, inpath, outpath, taglist=None):
+        """
+        """
+        self._inpath = inpath
+        self._outpath = outpath
+        self._taglist = taglist
+
+    def start(self, runner):
+        task.Task.start(self, runner)
+        self._pipeline = gst.parse_launch('''
+            filesrc location="%s" !
+            decodebin name=decoder ! audio/x-raw-int !
+            flacenc name=muxer !
+            filesink location="%s" name=sink''' % (self._inpath, self._outpath))
+
+
+        # set tags
+        if self._taglist:
+            muxer = self._pipeline.get_by_name('muxer')
+            muxer.merge_tags(self._taglist, gst.TAG_MERGE_APPEND)
+
+        self.debug('pausing pipeline')
+        self._pipeline.set_state(gst.STATE_PAUSED)
+        self._pipeline.get_state()
+        self.debug('paused pipeline')
+
+        # get length
+        decoder = self._pipeline.get_by_name('decoder')
+        self.debug('query duration')
+        length, format = muxer.query_duration(gst.FORMAT_DEFAULT)
+        # wavparse 0.10.14 returns in bytes
+        if format == gst.FORMAT_BYTES:
+            self.debug('query returned in BYTES format')
+            length /= 4
+        self.debug('total length: %r', length)
+        self._length = length
+
+        # add a probe so we can track progress
+        sinkpad = muxer.get_pad('sink')
+        srcpad = sinkpad.get_peer()
+        srcpad.add_buffer_probe(self._probe_handler, False)
+
+        # add eos handling
+        bus = self._pipeline.get_bus()
+        bus.add_signal_watch()
+        bus.connect('message::eos', self._eos_cb)
+
+        self.debug('scheduling setting to play')
+        # since set_state returns non-False, adding it as timeout_add
+        # will repeatedly call it, and block the main loop; so
+        #   gobject.timeout_add(0L, self._pipeline.set_state, gst.STATE_PLAYING)
+        # would not work.
+
+        def play():
+            self._pipeline.set_state(gst.STATE_PLAYING)
+            return False
+        self.runner.schedule(0, play)
+
+        #self._pipeline.set_state(gst.STATE_PLAYING)
+        self.debug('scheduled setting to play')
+
+    def _probe_handler(self, pad, buffer, ret):
+        # marshal to main thread
+        self.runner.schedule(0, self.setProgress,
+            float(buffer.offset) / self._length)
+        return True
+
+    def _eos_cb(self, bus, message):
+        self.debug('eos, scheduling stop')
+        self.runner.schedule(0, self.stop)
+
+    def stop(self):
+        self.debug('stopping')
+        self.debug('setting state to NULL')
+        self._pipeline.set_state(gst.STATE_NULL)
+        self.debug('set state to NULL')
+        task.Task.stop(self)