ainfo = tree.xpath("/bs1770gain/album/summary")[0]
album_gain = float(ainfo.xpath("./integrated/@lu")[0])
album_peak = float(ainfo.xpath("./sample-peak/@factor")[0])
tracks = tree.xpath("/bs1770gain/album/track")
rginfo = {}
for tinfo in tracks:
track_name = tinfo.xpath("./@file")[0]
track_gain = float(tinfo.xpath("./integrated/@lu")[0])
track_peak = float(tinfo.xpath("./sample-peak/@factor")[0])
rginfo[basenames_to_fnames[track_name]] = {
"replaygain_track_gain": track_gain,
"replaygain_track_peak": track_peak,
"replaygain_album_gain": album_gain,
"replaygain_album_peak": album_peak,
}
return rginfo
def supports_file(self, fname: str) -> bool:
enc = sys.getdefaultencoding()
p = Popen([bs1770gain_path, '-l', fname],
stderr=PIPE, stdout=PIPE)
stdout, stderr = [ s.decode(enc) for s in p.communicate() ]
if p.returncode != 0:
return False
if 'Input #' in stderr:
return True
else:
return False
register_backend('bs1770gain', Bs1770gainGainComputer())
from audiotools import UnsupportedFile
except ImportError as ex:
raise BackendUnavailableException("Unable to use the audiotools backend: Could not load audiotools module. ")
class AudiotoolsGainComputer(GainComputer):
def compute_gain(self, fnames: Iterable[str], album: bool = True) -> Dict[str, Dict[str, float]]:
fnames = list(fnames)
audio_files = audiotools.open_files(fnames)
if len(audio_files) != len(fnames):
raise Exception("Could not load some files")
rginfo = {}
tag_order = (
"replaygain_track_gain",
"replaygain_track_peak",
"replaygain_album_gain",
"replaygain_album_peak",
)
for rg in audiotools.calculate_replay_gain(audio_files):
rginfo[rg[0].filename] = dict(zip(tag_order, rg[1:]))
return rginfo
def supports_file(self, fname: str) -> bool:
# Readable by audiotools?
try:
audiotools.open(fname)
return True
except UnsupportedFile:
return False
register_backend('audiotools', AudiotoolsGainComputer())
class AudiotoolsGainComputer(GainComputer):
def compute_gain(self,
fnames: Iterable[str],
album: bool = True) -> Dict[str, Dict[str, float]]:
fnames = list(fnames)
audio_files = audiotools.open_files(fnames)
if len(audio_files) != len(fnames):
raise Exception("Could not load some files")
rginfo = {}
tag_order = (
"replaygain_track_gain",
"replaygain_track_peak",
"replaygain_album_gain",
"replaygain_album_peak",
)
for rg in audiotools.calculate_replay_gain(audio_files):
rginfo[rg[0].filename] = dict(zip(tag_order, rg[1:]))
return rginfo
def supports_file(self, fname: str) -> bool:
# Readable by audiotools?
try:
audiotools.open(fname)
return True
except UnsupportedFile:
return False
register_backend('audiotools', AudiotoolsGainComputer())
ainfo = tree.xpath("/bs1770gain/album/summary")[0]
album_gain = float(ainfo.xpath("./integrated/@lu")[0])
album_peak = float(ainfo.xpath("./sample-peak/@factor")[0])
tracks = tree.xpath("/bs1770gain/album/track")
rginfo = {}
for tinfo in tracks:
track_name = tinfo.xpath("./@file")[0]
track_gain = float(tinfo.xpath("./integrated/@lu")[0])
track_peak = float(tinfo.xpath("./sample-peak/@factor")[0])
rginfo[basenames_to_fnames[track_name]] = {
"replaygain_track_gain": track_gain,
"replaygain_track_peak": track_peak,
"replaygain_album_gain": album_gain,
"replaygain_album_peak": album_peak,
}
return rginfo
def supports_file(self, fname: str) -> bool:
enc = sys.getdefaultencoding()
p = Popen([bs1770gain_path, '-l', fname], stderr=PIPE, stdout=PIPE)
stdout, stderr = [s.decode(enc) for s in p.communicate()]
if p.returncode != 0:
return False
if 'Input #' in stderr:
return True
else:
return False
register_backend('bs1770gain', Bs1770gainGainComputer())
