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# GNU MediaGoblin -- federated, autonomous media hosting
# Copyright (C) 2013 MediaGoblin contributors. See AUTHORS.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 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 Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import tempfile
import shutil
import os
import pytest
from contextlib import contextmanager
import logging
import imghdr
#os.environ['GST_DEBUG'] = '4,python:4'
pytest.importorskip("gi.repository.Gst")
pytest.importorskip("scikits.audiolab")
import gi
gi.require_version('Gst', '1.0')
from gi.repository import Gst
Gst.init(None)
from mediagoblin.media_types.audio.transcoders import (AudioTranscoder,
AudioThumbnailer)
from mediagoblin.media_types.tools import discover
@contextmanager
def create_audio():
audio = tempfile.NamedTemporaryFile()
src = Gst.ElementFactory.make('audiotestsrc', None)
src.set_property('num-buffers', 50)
enc = Gst.ElementFactory.make('flacenc', None)
dst = Gst.ElementFactory.make('filesink', None)
dst.set_property('location', audio.name)
pipeline = Gst.Pipeline()
pipeline.add(src)
pipeline.add(enc)
pipeline.add(dst)
src.link(enc)
enc.link(dst)
pipeline.set_state(Gst.State.PLAYING)
state = pipeline.get_state(3 * Gst.SECOND)
assert state[0] == Gst.StateChangeReturn.SUCCESS
bus = pipeline.get_bus()
bus.timed_pop_filtered(
3 * Gst.SECOND,
Gst.MessageType.ERROR | Gst.MessageType.EOS)
pipeline.set_state(Gst.State.NULL)
yield (audio.name)
@contextmanager
def create_data_for_test():
with create_audio() as audio_name:
second_file = tempfile.NamedTemporaryFile()
yield (audio_name, second_file.name)
def test_transcoder():
'''
Tests AudioTransocder's transcode method
'''
transcoder = AudioTranscoder()
with create_data_for_test() as (audio_name, result_name):
transcoder.transcode(audio_name, result_name, quality=0.3,
progress_callback=None)
info = discover(result_name)
assert len(info.get_audio_streams()) == 1
transcoder.transcode(audio_name, result_name, quality=0.3,
mux_name='oggmux', progress_callback=None)
info = discover(result_name)
assert len(info.get_audio_streams()) == 1
def test_thumbnails():
'''Test thumbnails generation.
The code below heavily repeats
audio.processing.CommonAudioProcessor.create_spectrogram
1. Create test audio
2. Convert it to OGG source for spectogram using transcoder
3. Create spectogram in jpg
'''
thumbnailer = AudioThumbnailer()
transcoder = AudioTranscoder()
with create_data_for_test() as (audio_name, new_name):
transcoder.transcode(audio_name, new_name, mux_name='oggmux')
thumbnail = tempfile.NamedTemporaryFile(suffix='.jpg')
# fft_size below is copypasted from config_spec.ini
thumbnailer.spectrogram(new_name, thumbnail.name, width=100,
fft_size=4096)
assert imghdr.what(thumbnail.name) == 'jpeg'
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