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skip audio reprocessing if necessary

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This commit is contained in:
Rodney Ewing 2013-08-27 15:55:43 -07:00
parent f4f84297ef
commit 2e22cefdd9
1 changed files with 39 additions and 0 deletions
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39
mediagoblin/media_types/audio/processing.py
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@ -87,10 +87,34 @@ class CommonAudioProcessor(MediaProcessor):
self.entry.media_files['best_quality'] = self.entry \
.media_files['webm_audio']
def _skip_processing(self, keyname, **kwargs):
file_metadata = self.entry.get_file_metadata(keyname)
skip = True
if not file_metadata:
return False
if keyname == 'webm_audio':
if kwargs.get('quality') != file_metadata.get('quality'):
skip = False
elif keyname == 'spectrogram':
if kwargs.get('max_width') != file_metadata.get('max_width'):
skip = False
elif kwargs.get('fft_size') != file_metadata.get('fft_size'):
skip = False
elif keyname == 'thumb':
if kwargs.get('size') != file_metadata.get('size'):
skip = False
return skip
def transcode(self, quality=None):
if not quality:
quality = self.audio_config['quality']
if self._skip_processing('webm_audio', quality=quality):
return
progress_callback = ProgressCallback(self.entry)
webm_audio_tmp = os.path.join(self.workbench.dir,
self.name_builder.fill(
@ -110,12 +134,18 @@ class CommonAudioProcessor(MediaProcessor):
store_public(self.entry, 'webm_audio', webm_audio_tmp,
self.name_builder.fill('{basename}.medium.webm'))
self.entry.set_file_metadata('webm_audio', **{'quality': quality})
def create_spectrogram(self, max_width=None, fft_size=None):
if not max_width:
max_width = mgg.global_config['media:medium']['max_width']
if not fft_size:
fft_size = self.audio_config['spectrogram_fft_size']
if self._skip_processing('spectrogram', max_width=max_width,
fft_size=fft_size):
return
wav_tmp = os.path.join(self.workbench.dir, self.name_builder.fill(
'{basename}.ogg'))
@ -140,12 +170,19 @@ class CommonAudioProcessor(MediaProcessor):
store_public(self.entry, 'spectrogram', spectrogram_tmp,
self.name_builder.fill('{basename}.spectrogram.jpg'))
file_metadata = {'max_width': max_width,
'fft_size': fft_size}
self.entry.set_file_metadata('spectrogram', **file_metadata)
def generate_thumb(self, size=None):
if not size:
max_width = mgg.global_config['media:thumb']['max_width']
max_height = mgg.global_config['media:thumb']['max_height']
size = (max_width, max_height)
if self._skip_processing('thumb', size=size):
return
thumb_tmp = os.path.join(self.workbench.dir, self.name_builder.fill(
'{basename}-thumbnail.jpg'))
@ -166,6 +203,8 @@ class CommonAudioProcessor(MediaProcessor):
store_public(self.entry, 'thumb', thumb_tmp,
self.name_builder.fill('{basename}.thumbnail.jpg'))
self.entry.set_file_metadata('thumb', **{'size': size})
class InitialProcessor(CommonAudioProcessor):
"""