def from_pcm(cls, filename, pcmreader,
compression="2"):
import decimal,bisect
if (compression not in cls.COMPRESSION_MODES):
compression = cls.DEFAULT_COMPRESSION
if ((pcmreader.channels > 2) or
(pcmreader.sample_rate not in (32000,48000,44100))):
pcmreader = PCMConverter(
pcmreader,
sample_rate=[32000,32000,44100,48000][bisect.bisect(
[32000,44100,48000],pcmreader.sample_rate)],
channels=min(pcmreader.channels,2),
channel_mask=ChannelMask.from_channels(min(pcmreader.channels,2)),
bits_per_sample=16)
if (pcmreader.channels > 1):
mode = "j"
else:
mode = "m"
#FIXME - not sure if all LAME versions support "--little-endian"
# #LAME 3.98 (and up, presumably) handle the byteswap correctly
# #LAME 3.97 always uses -x
# if (BIG_ENDIAN or (cls.__lame_version__() < (3,98))):
# endian = ['-x']
# else:
# endian = []
devnull = file(os.devnull,'ab')
sub = subprocess.Popen([BIN['lame'],"--quiet",
"-r",
"-s",str(decimal.Decimal(pcmreader.sample_rate) / 1000),
"--bitwidth",str(pcmreader.bits_per_sample),
"--signed","--little-endian",
"-m",mode,
"-V" + str(compression),
"-",
filename],
stdin=subprocess.PIPE,
stdout=devnull,
stderr=devnull,
preexec_fn=ignore_sigint)
transfer_framelist_data(pcmreader,sub.stdin.write)
try:
pcmreader.close()
except DecodingError:
raise EncodingError()
sub.stdin.close()
devnull.close()
if (sub.wait() == 0):
return MP3Audio(filename)
else:
raise EncodingError(BIN['lame'])
def from_pcm(cls, filename, pcmreader,
compression=None, total_pcm_frames=None):
"""encodes a new file from PCM data
takes a filename string, PCMReader object,
optional compression level string and
optional total_pcm_frames integer
encodes a new audio file from pcmreader's data
at the given filename with the specified compression level
and returns a new MP2Audio object"""
from audiotools import (PCMConverter,
BufferedPCMReader,
ChannelMask,
__default_quality__,
EncodingError)
from audiotools.encoders import encode_mp2
import bisect
if (((compression is None) or
(compression not in cls.COMPRESSION_MODES))):
compression = __default_quality__(cls.NAME)
if pcmreader.sample_rate in (32000, 48000, 44100):
sample_rate = pcmreader.sample_rate
else:
sample_rate = [32000,
32000,
44100,
48000][bisect.bisect([32000,
44100,
48000],
pcmreader.sample_rate)]
if total_pcm_frames is not None:
from audiotools import CounterPCMReader
pcmreader = CounterPCMReader(pcmreader)
try:
encode_mp2(filename,
PCMConverter(pcmreader,
sample_rate=sample_rate,
channels=min(pcmreader.channels, 2),
channel_mask=ChannelMask.from_channels(
min(pcmreader.channels, 2)),
bits_per_sample=16),
int(compression))
if ((total_pcm_frames is not None) and
(total_pcm_frames != pcmreader.frames_written)):
from audiotools.text import ERR_TOTAL_PCM_FRAMES_MISMATCH
cls.__unlink__(filename)
raise EncodingError(ERR_TOTAL_PCM_FRAMES_MISMATCH)
return MP2Audio(filename)
except (ValueError, IOError) as err:
cls.__unlink__(filename)
raise EncodingError(str(err))
finally:
pcmreader.close()
def from_pcm(cls,
filename,
pcmreader,
compression=None,
total_pcm_frames=None):
"""encodes a new file from PCM data
takes a filename string, PCMReader object,
optional compression level string and
optional total_pcm_frames integer
encodes a new audio file from pcmreader's data
at the given filename with the specified compression level
and returns a new VorbisAudio object"""
from audiotools import (BufferedPCMReader, __default_quality__,
EncodingError)
from audiotools.encoders import encode_vorbis
if (((compression is None)
or (compression not in cls.COMPRESSION_MODES))):
compression = __default_quality__(cls.NAME)
if pcmreader.bits_per_sample not in {8, 16, 24}:
from audiotools import UnsupportedBitsPerSample
pcmreader.close()
raise UnsupportedBitsPerSample(filename, pcmreader.bits_per_sample)
if (pcmreader.channels > 2) and (pcmreader.channels <= 8):
channel_mask = int(pcmreader.channel_mask)
if ((channel_mask != 0) and (channel_mask not in (
0x7, # FR, FC, FL
0x33, # FR, FL, BR, BL
0x37, # FR, FC, FL, BL, BR
0x3f, # FR, FC, FL, BL, BR, LFE
0x70f, # FL, FC, FR, SL, SR, BC, LFE
0x63f))): # FL, FC, FR, SL, SR, BL, BR, LFE
from audiotools import UnsupportedChannelMask
pcmreader.close()
raise UnsupportedChannelMask(filename, channel_mask)
if total_pcm_frames is not None:
from audiotools import CounterPCMReader
pcmreader = CounterPCMReader(pcmreader)
try:
encode_vorbis(filename, pcmreader, float(compression) / 10)
if ((total_pcm_frames is not None)
and (total_pcm_frames != pcmreader.frames_written)):
from audiotools.text import ERR_TOTAL_PCM_FRAMES_MISMATCH
cls.__unlink__(filename)
raise EncodingError(ERR_TOTAL_PCM_FRAMES_MISMATCH)
return VorbisAudio(filename)
except (ValueError, IOError) as err:
cls.__unlink__(filename)
raise EncodingError(str(err))
finally:
pcmreader.close()
def from_pcm(cls, filename, pcmreader,
compression=None,
total_pcm_frames=None,
encoding_function=None):
"""encodes a new file from PCM data
takes a filename string, PCMReader object,
optional compression level string and
optional total_pcm_frames integer
encodes a new audio file from pcmreader's data
at the given filename with the specified compression level
and returns a new WavPackAudio object"""
from audiotools.encoders import encode_wavpack
from audiotools import BufferedPCMReader
from audiotools import CounterPCMReader
from audiotools import EncodingError
from audiotools import __default_quality__
if pcmreader.bits_per_sample not in (8, 16, 24):
# WavPack technically supports up to 32 bits-per-sample
# but nothing else does
# so I'll treat it as unsupported for now
from audiotools import UnsupportedBitsPerSample
pcmreader.close()
raise UnsupportedBitsPerSample(filename, pcmreader.bits_per_sample)
if (((compression is None) or
(compression not in cls.COMPRESSION_MODES))):
compression = __default_quality__(cls.NAME)
counter = CounterPCMReader(pcmreader)
try:
(encode_wavpack if encoding_function is None
else encoding_function)(
filename=filename,
pcmreader=counter,
total_pcm_frames=(total_pcm_frames if
total_pcm_frames is not None else 0),
compression=compression)
counter.close()
except (ValueError, IOError) as msg:
counter.close()
cls.__unlink__(filename)
raise EncodingError(str(msg))
except Exception:
counter.close()
cls.__unlink__(filename)
raise
# ensure actual total PCM frames matches argument, if any
if (((total_pcm_frames is not None) and
(counter.frames_written != total_pcm_frames))):
cls.__unlink__(filename)
from audiotools.text import ERR_TOTAL_PCM_FRAMES_MISMATCH
raise EncodingError(ERR_TOTAL_PCM_FRAMES_MISMATCH)
return cls(filename)
def from_pcm(cls,
filename,
pcmreader,
compression=None,
total_pcm_frames=None,
encoding_function=None):
"""encodes a new file from PCM data
takes a filename string, PCMReader object,
optional compression level string and
optional total_pcm_frames integer
encodes a new audio file from pcmreader's data
at the given filename with the specified compression level
and returns a new AudioFile-compatible object
may raise EncodingError if some problem occurs when
encoding the input file. This includes an error
in the input stream, a problem writing the output file,
or even an EncodingError subclass such as
"UnsupportedBitsPerSample" if the input stream
is formatted in a way this class is unable to support
"""
from audiotools import (BufferedPCMReader, CounterPCMReader,
transfer_data, EncodingError)
# from audiotools.py_encoders import encode_tta
from audiotools.encoders import encode_tta
from audiotools.bitstream import BitstreamWriter
if pcmreader.bits_per_sample not in {8, 16, 24}:
from audiotools import UnsupportedBitsPerSample
pcmreader.close()
raise UnsupportedBitsPerSample(filename, pcmreader.bits_per_sample)
# open output file right away
# so we can fail as soon as possible
try:
file = open(filename, "wb")
except IOError as err:
pcmreader.close()
raise EncodingError(str(err))
try:
encode_tta(file=file,
pcmreader=pcmreader,
total_pcm_frames=(total_pcm_frames if total_pcm_frames
is not None else 0))
return cls(filename)
except (IOError, ValueError) as err:
cls.__unlink__(filename)
raise EncodingError(str(err))
except:
cls.__unlink__(filename)
raise
finally:
file.close()
def from_pcm(cls, filename, pcmreader, compression=None):
if (compression not in cls.COMPRESSION_MODES):
compression = cls.DEFAULT_COMPRESSION
devnull = file(os.devnull, 'ab')
sub = subprocess.Popen([
BIN['oggenc'], '-Q', '-r', '-B',
str(pcmreader.bits_per_sample), '-C',
str(pcmreader.channels), '-R',
str(pcmreader.sample_rate), '--raw-endianness',
str(0), '-q', compression, '-o', filename, '-'
],
stdin=subprocess.PIPE,
stdout=devnull,
stderr=devnull,
preexec_fn=ignore_sigint)
if ((pcmreader.channels <= 2) or (int(pcmreader.channel_mask) == 0)):
transfer_framelist_data(pcmreader, sub.stdin.write)
elif (pcmreader.channels <= 8):
if (int(pcmreader.channel_mask) in (
0x7, #FR, FC, FL
0x33, #FR, FL, BR, BL
0x37, #FR, FC, FL, BL, BR
0x3f, #FR, FC, FL, BL, BR, LFE
0x70f, #FL, FC, FR, SL, SR, BC, LFE
0x63f) #FL, FC, FR, SL, SR, BL, BR, LFE
):
standard_channel_mask = ChannelMask(pcmreader.channel_mask)
vorbis_channel_mask = VorbisChannelMask(standard_channel_mask)
else:
raise UnsupportedChannelMask()
transfer_framelist_data(
ReorderedPCMReader(pcmreader, [
standard_channel_mask.channels().index(channel)
for channel in vorbis_channel_mask.channels()
]), sub.stdin.write)
else:
raise UnsupportedChannelMask()
try:
pcmreader.close()
except DecodingError:
raise EncodingError()
sub.stdin.close()
devnull.close()
if (sub.wait() == 0):
return VorbisAudio(filename)
else:
raise EncodingError(BIN['oggenc'])
def from_pcm(cls, filename, pcmreader,
compression=None,
total_pcm_frames=None,
encoding_function=None):
"""encodes a new file from PCM data
takes a filename string, PCMReader object,
optional compression level string and
optional total_pcm_frames integer
encodes a new audio file from pcmreader's data
at the given filename with the specified compression level
and returns a new WavPackAudio object"""
from audiotools.encoders import encode_wavpack
from audiotools import BufferedPCMReader
from audiotools import CounterPCMReader
from audiotools import EncodingError
from audiotools import __default_quality__
if (((compression is None) or
(compression not in cls.COMPRESSION_MODES))):
compression = __default_quality__(cls.NAME)
counter = CounterPCMReader(pcmreader)
try:
(encode_wavpack if encoding_function is None
else encoding_function)(
filename,
BufferedPCMReader(counter),
total_pcm_frames=(total_pcm_frames if
total_pcm_frames is not None else 0),
**cls.__options__[compression])
counter.close()
except (ValueError, IOError) as msg:
counter.close()
cls.__unlink__(filename)
raise EncodingError(str(msg))
except Exception:
counter.close()
cls.__unlink__(filename)
raise
# ensure actual total PCM frames matches argument, if any
if (((total_pcm_frames is not None) and
(counter.frames_written != total_pcm_frames))):
cls.__unlink__(filename)
from audiotools.text import ERR_TOTAL_PCM_FRAMES_MISMATCH
raise EncodingError(ERR_TOTAL_PCM_FRAMES_MISMATCH)
return cls(filename)
def from_pcm(cls, filename, pcmreader, compression=None):
import bisect
if (compression not in cls.COMPRESSION_MODES):
compression = cls.DEFAULT_COMPRESSION
if ((pcmreader.bits_per_sample not in (8,16)) or
(pcmreader.channels > 2) or
(pcmreader.sample_rate not in (8000,16000,32000,44100))):
pcmreader = PCMConverter(
pcmreader,
sample_rate=[8000,8000,16000,32000,44100][bisect.bisect(
[8000,16000,32000,44100],pcmreader.sample_rate)],
channels=min(pcmreader.channels,2),
channel_mask=ChannelMask.from_channels(min(pcmreader.channels,2)),
bits_per_sample=min(pcmreader.bits_per_sample,16))
BITS_PER_SAMPLE = {8:['--8bit'],
16:['--16bit']}[pcmreader.bits_per_sample]
CHANNELS = {1:[],2:['--stereo']}[pcmreader.channels]
devnull = file(os.devnull,"ab")
sub = subprocess.Popen([BIN['speexenc'],
'--quality',str(compression),
'--rate',str(pcmreader.sample_rate),
'--le'] + \
BITS_PER_SAMPLE + \
CHANNELS + \
['-',filename],
stdin=subprocess.PIPE,
stderr=devnull,
preexec_fn=ignore_sigint)
transfer_framelist_data(pcmreader,sub.stdin.write)
try:
pcmreader.close()
except DecodingError:
raise EncodingError()
sub.stdin.close()
result = sub.wait()
devnull.close()
if (result == 0):
return SpeexAudio(filename)
else:
raise EncodingError(BIN['speexenc'])
def from_pcm(cls, filename, pcmreader, compression=None):
if (pcmreader.bits_per_sample not in (8, 16, 24)):
raise InvalidFormat(
_(u"Unsupported bits per sample %s") %
(pcmreader.bits_per_sample))
bytes_per_sample = pcmreader.bits_per_sample / 8
header = construct.Container(magic_number='.snd',
data_offset=0,
data_size=0,
encoding_format={
8: 2,
16: 3,
24: 4
}[pcmreader.bits_per_sample],
sample_rate=pcmreader.sample_rate,
channels=pcmreader.channels)
try:
f = file(filename, 'wb')
except IOError:
raise EncodingError(None)
try:
#send out a dummy header
f.write(AuAudio.AU_HEADER.build(header))
header.data_offset = f.tell()
#send our big-endian PCM data
#d will be a list of ints, so we can't use transfer_data
framelist = pcmreader.read(BUFFER_SIZE)
while (len(framelist) > 0):
bytes = framelist.to_bytes(True, True)
f.write(bytes)
header.data_size += len(bytes)
framelist = pcmreader.read(BUFFER_SIZE)
#send out a complete header
f.seek(0, 0)
f.write(AuAudio.AU_HEADER.build(header))
finally:
f.close()
try:
pcmreader.close()
except DecodingError:
raise EncodingError()
return AuAudio(filename)
def from_pcm(cls, filename, pcmreader,
compression="192"):
import decimal,bisect
if (compression not in cls.COMPRESSION_MODES):
compression = cls.DEFAULT_COMPRESSION
if ((pcmreader.channels > 2) or
(pcmreader.sample_rate not in (32000,48000,44100)) or
(pcmreader.bits_per_sample != 16)):
pcmreader = PCMConverter(
pcmreader,
sample_rate=[32000,32000,44100,48000][bisect.bisect(
[32000,44100,48000],pcmreader.sample_rate)],
channels=min(pcmreader.channels,2),
channel_mask=pcmreader.channel_mask,
bits_per_sample=16)
devnull = file(os.devnull,'ab')
sub = subprocess.Popen([BIN['twolame'],"--quiet",
"-r",
"-s",str(pcmreader.sample_rate),
"--samplesize",str(pcmreader.bits_per_sample),
"-N",str(pcmreader.channels),
"-m","a",
"-b",compression,
"-",
filename],
stdin=subprocess.PIPE,
stdout=devnull,
stderr=devnull,
preexec_fn=ignore_sigint)
transfer_framelist_data(pcmreader,sub.stdin.write)
try:
pcmreader.close()
except DecodingError:
raise EncodingError()
sub.stdin.close()
devnull.close()
if (sub.wait() == 0):
return MP2Audio(filename)
else:
raise EncodingError(BIN['twolame'])
def from_wave(cls, filename, wave_filename, compression=None,
block_size=256):
"""Encodes a new AudioFile from an existing .wav file.
Takes a filename string, wave_filename string
of an existing WaveAudio file
and an optional compression level string.
Encodes a new audio file from the wave's data
at the given filename with the specified compression level
and returns a new ShortenAudio object."""
wave = WaveAudio(wave_filename)
if (wave.bits_per_sample() not in (8, 16)):
raise UnsupportedBitsPerSample()
(head, tail) = wave.pcm_split()
if (len(tail) > 0):
blocks = [head, None, tail]
else:
blocks = [head, None]
import audiotools.encoders
try:
audiotools.encoders.encode_shn(filename=filename,
pcmreader=wave.to_pcm(),
block_size=block_size,
verbatim_chunks=blocks)
return cls(filename)
except IOError, err:
cls.__unlink__(filename)
raise EncodingError(str(err))
def from_pcm(cls, filename, pcmreader, compression=None):
"""Returns a PCMReader object containing the track's PCM data."""
if ((compression is None)
or (compression not in cls.COMPRESSION_MODES)):
compression = __default_quality__(cls.NAME)
devnull = file(os.devnull, 'ab')
sub = subprocess.Popen([
BIN['oggenc'], '-Q', '-r', '-B',
str(pcmreader.bits_per_sample), '-C',
str(pcmreader.channels), '-R',
str(pcmreader.sample_rate), '--raw-endianness',
str(0), '-q', compression, '-o', filename, '-'
],
stdin=subprocess.PIPE,
stdout=devnull,
stderr=devnull,
preexec_fn=ignore_sigint)
if ((pcmreader.channels <= 2) or (int(pcmreader.channel_mask) == 0)):
try:
transfer_framelist_data(pcmreader, sub.stdin.write)
except (IOError, ValueError), err:
sub.stdin.close()
sub.wait()
cls.__unlink__(filename)
raise EncodingError(str(err))
except Exception, err:
sub.stdin.close()
sub.wait()
cls.__unlink__(filename)
raise err
def from_pcm(cls, filename, pcmreader, compression=None):
"""Encodes a new file from PCM data.
Takes a filename string, PCMReader object
and optional compression level string.
Encodes a new audio file from pcmreader's data
at the given filename with the specified compression level
and returns a new AuAudio object."""
if (pcmreader.bits_per_sample not in (8, 16, 24)):
raise InvalidFormat(
_(u"Unsupported bits per sample %s") %
(pcmreader.bits_per_sample))
bytes_per_sample = pcmreader.bits_per_sample / 8
header = Con.Container(magic_number='.snd',
data_offset=0,
data_size=0,
encoding_format={
8: 2,
16: 3,
24: 4
}[pcmreader.bits_per_sample],
sample_rate=pcmreader.sample_rate,
channels=pcmreader.channels)
try:
f = file(filename, 'wb')
except IOError, err:
raise EncodingError(str(err))
def from_wave(cls, filename, wave_filename, compression=None):
"""Encodes a new AudioFile from an existing .wav file.
Takes a filename string, wave_filename string
of an existing WaveAudio file
and an optional compression level string.
Encodes a new audio file from the wave's data
at the given filename with the specified compression level
and returns a new WavPackAudio object."""
from . import encoders
if ((compression is None)
or (compression not in cls.COMPRESSION_MODES)):
compression = __default_quality__(cls.NAME)
wave = WaveAudio(wave_filename)
(head, tail) = wave.pcm_split()
#FIXME - check errors here
try:
encoders.encode_wavpack(filename,
wave.to_pcm(),
wave_header=head,
wave_footer=tail,
**cls.__options__[compression])
return cls(filename)
except (ValueError, IOError), msg:
cls.__unlink__(filename)
raise EncodingError(str(msg))
def to_wave(self, wave_filename):
devnull = file(os.devnull, 'ab')
#WavPack stupidly refuses to run if the filename doesn't end with .wv
if (self.filename.endswith(".wv")):
sub = subprocess.Popen([
BIN['wvunpack'], '-q', '-y', self.filename, '-o', wave_filename
],
stdout=devnull,
stderr=devnull)
if (sub.wait() != 0):
raise EncodingError()
else:
#create a temporary symlink to the current file
#rather than rewrite the whole thing
import tempfile
tempdir = tempfile.mkdtemp()
symlink = os.path.join(tempdir,
os.path.basename(self.filename) + ".wv")
try:
os.symlink(os.path.abspath(self.filename), symlink)
WavPackAudio(symlink).to_wave(wave_filename)
finally:
os.unlink(symlink)
os.rmdir(tempdir)
def from_pcm(cls,
filename,
pcmreader,
compression=None,
total_pcm_frames=None):
"""encodes a new file from PCM data
takes a filename string, PCMReader object,
optional compression level string and
optional total_pcm_frames integer
encodes a new audio file from pcmreader's data
at the given filename with the specified compression level
and returns a new AudioFile-compatible object
may raise EncodingError if some problem occurs when
encoding the input file. This includes an error
in the input stream, a problem writing the output file,
or even an EncodingError subclass such as
"UnsupportedBitsPerSample" if the input stream
is formatted in a way this class is unable to support
"""
from audiotools import (BufferedPCMReader, PCMConverter,
__default_quality__, EncodingError)
from audiotools.encoders import encode_opus
if (((compression is None)
or (compression not in cls.COMPRESSION_MODES))):
compression = __default_quality__(cls.NAME)
if ((pcmreader.channels > 2) and (pcmreader.channels <= 8)):
channel_mask = int(pcmreader.channel_mask)
if ((channel_mask != 0) and (channel_mask not in (
0x7, # FR, FC, FL
0x33, # FR, FL, BR, BL
0x37, # FR, FC, FL, BL, BR
0x3f, # FR, FC, FL, BL, BR, LFE
0x70f, # FL, FC, FR, SL, SR, BC, LFE
0x63f))): # FL, FC, FR, SL, SR, BL, BR, LFE
raise UnsupportedChannelMask(filename, channel_mask)
try:
encode_opus(filename,
BufferedPCMReader(
PCMConverter(pcmreader,
sample_rate=48000,
channels=pcmreader.channels,
channel_mask=pcmreader.channel_mask,
bits_per_sample=16)),
quality=int(compression),
original_sample_rate=pcmreader.sample_rate)
return cls(filename)
except (ValueError, IOError), err:
cls.__unlink__(filename)
raise EncodingError(err)
def to_wave(self, wave_filename):
"""Writes the contents of this file to the given .wav filename string.
Raises EncodingError if some error occurs during decoding."""
if (not hasattr(self, "__format__")):
try:
self.__populate_metadata__()
except IOError, msg:
raise EncodingError(str(msg))
def from_pcm(cls, filename, pcmreader, compression=None):
"""Encodes a new file from PCM data.
Takes a filename string, PCMReader object
and optional compression level string.
Encodes a new audio file from pcmreader's data
at the given filename with the specified compression level
and returns a new SpeexAudio object."""
import bisect
if ((compression is None)
or (compression not in cls.COMPRESSION_MODES)):
compression = __default_quality__(cls.NAME)
if ((pcmreader.bits_per_sample not in (8, 16))
or (pcmreader.channels > 2)
or (pcmreader.sample_rate not in (8000, 16000, 32000, 44100))):
pcmreader = PCMConverter(
pcmreader,
sample_rate=[8000, 8000, 16000, 32000,
44100][bisect.bisect([8000, 16000, 32000, 44100],
pcmreader.sample_rate)],
channels=min(pcmreader.channels, 2),
channel_mask=ChannelMask.from_channels(
min(pcmreader.channels, 2)),
bits_per_sample=min(pcmreader.bits_per_sample, 16))
BITS_PER_SAMPLE = {
8: ['--8bit'],
16: ['--16bit']
}[pcmreader.bits_per_sample]
CHANNELS = {1: [], 2: ['--stereo']}[pcmreader.channels]
devnull = file(os.devnull, "ab")
sub = subprocess.Popen([BIN['speexenc'],
'--quality', str(compression),
'--rate', str(pcmreader.sample_rate),
'--le'] + \
BITS_PER_SAMPLE + \
CHANNELS + \
['-', filename],
stdin=subprocess.PIPE,
stderr=devnull,
preexec_fn=ignore_sigint)
try:
transfer_framelist_data(pcmreader, sub.stdin.write)
except (IOError, ValueError), err:
sub.stdin.close()
sub.wait()
cls.__unlink__(filename)
raise EncodingError(str(err))
def to_wave(self, wave_filename):
"""Writes the contents of this file to the given .wav filename string.
Raises EncodingError if some error occurs during decoding."""
from . import decoders
try:
f = open(wave_filename, 'wb')
except IOError, msg:
raise EncodingError(str(msg))
def from_pcm(cls, filename, pcmreader, compression=None):
"""Encodes a new file from PCM data.
Takes a filename string, PCMReader object
and optional compression level string.
Encodes a new audio file from pcmreader's data
at the given filename with the specified compression level
and returns a new AiffAudio object."""
try:
f = open(filename, 'wb')
except IOError, msg:
raise EncodingError(str(msg))
def from_pcm(cls, filename, pcmreader, compression=None):
"""Encodes a new file from PCM data.
Takes a filename string, PCMReader object
and optional compression level string.
Encodes a new audio file from pcmreader's data
at the given filename with the specified compression level
and returns a new MP2Audio object."""
import decimal
import bisect
if ((compression is None) or
(compression not in cls.COMPRESSION_MODES)):
compression = __default_quality__(cls.NAME)
if ((pcmreader.channels > 2) or
(pcmreader.sample_rate not in (32000, 48000, 44100)) or
(pcmreader.bits_per_sample != 16)):
pcmreader = PCMConverter(
pcmreader,
sample_rate=[32000, 32000, 44100, 48000][bisect.bisect(
[32000, 44100, 48000], pcmreader.sample_rate)],
channels=min(pcmreader.channels, 2),
channel_mask=pcmreader.channel_mask,
bits_per_sample=16)
devnull = file(os.devnull, 'ab')
sub = subprocess.Popen([BIN['twolame'], "--quiet",
"-r",
"-s", str(pcmreader.sample_rate),
"--samplesize", str(pcmreader.bits_per_sample),
"-N", str(pcmreader.channels),
"-m", "a",
"-b", compression,
"-",
filename],
stdin=subprocess.PIPE,
stdout=devnull,
stderr=devnull,
preexec_fn=ignore_sigint)
try:
transfer_framelist_data(pcmreader, sub.stdin.write)
except (ValueError, IOError), err:
sub.stdin.close()
sub.wait()
cls.__unlink__(filename)
raise EncodingError(str(err))
def to_wave(self, wave_filename):
if (not hasattr(self,"__format__")):
self.__populate_metadata__()
if (self.__format__ is WaveAudio):
try:
f = open(wave_filename,'wb')
except IOError:
raise EncodingError()
for block in self.__blocks__:
if (block is not None):
f.write(block)
else:
transfer_framelist_data(
audiotools.decoders.SHNDecoder(self.filename),
f.write)
else:
WaveAudio.from_pcm(wave_filename,self.to_pcm())
def __from_wave__(cls, filename, wave_filename, compression=None):
if (str(compression) not in cls.COMPRESSION_MODES):
compression = cls.DEFAULT_COMPRESSION
#mppenc requires files to end with .mpc for some reason
if (not filename.endswith(".mpc")):
import tempfile
actual_filename = filename
tempfile = tempfile.NamedTemporaryFile(suffix=".mpc")
filename = tempfile.name
else:
actual_filename = tempfile = None
###Musepack SV7###
#sub = subprocess.Popen([BIN['mppenc'],
# "--silent",
# "--overwrite",
# "--%s" % (compression),
# wave_filename,
# filename],
# preexec_fn=ignore_sigint)
###Musepack SV8###
sub = subprocess.Popen([BIN['mpcenc'],
"--silent",
"--overwrite",
"--%s" % (compression),
wave_filename,
filename])
if (sub.wait() == 0):
if (tempfile is not None):
filename = actual_filename
f = file(filename, 'wb')
tempfile.seek(0, 0)
transfer_data(tempfile.read, f.write)
f.close()
tempfile.close()
return MusepackAudio(filename)
else:
if (tempfile is not None):
tempfile.close()
raise EncodingError(u"error encoding file with mpcenc")
def __from_wave__(cls, filename, wave_filename, compression):
import subprocess
import os
from audiotools import EncodingError
sub = subprocess.Popen(
[
BIN["neroAacEnc"], "-q", compression, "-if", wave_filename,
"-of", filename
],
stdout=subprocess.DEVNULL
if hasattr(subprocess, "DEVNULL") else open(os.devnull, "wb"),
stderr=subprocess.DEVNULL
if hasattr(subprocess, "DEVNULL") else open(os.devnull, "wb"))
if sub.wait() != 0:
raise EncodingError(u"neroAacEnc unable to write file")
else:
return cls(filename)
def from_wave(cls, filename, wave_filename, compression=None):
if (str(compression) not in cls.COMPRESSION_MODES):
compression = cls.DEFAULT_COMPRESSION
compression_param = {
"fast": ["-f"],
"standard": [],
"high": ["-h"],
"veryhigh": ["-hh"]
}
#wavpack will add a .wv suffix if there isn't one
#this isn't desired behavior
if (filename.endswith(".wv")):
devnull = file(os.devnull, 'ab')
sub = subprocess.Popen([BIN['wavpack'],
wave_filename] + \
compression_param[compression] + \
['-q','-y','-o',
filename],
stdout=devnull,
stderr=devnull,
preexec_fn=ignore_sigint)
devnull.close()
if (sub.wait() == 0):
return WavPackAudio(filename)
else:
raise EncodingError(BIN['wavpack'])
else:
import tempfile
tempdir = tempfile.mkdtemp()
symlink = os.path.join(tempdir, os.path.basename(filename) + ".wv")
try:
os.symlink(os.path.abspath(filename), symlink)
cls.from_wave(symlink, wave_filename, compression)
return WavPackAudio(filename)
finally:
os.unlink(symlink)
os.rmdir(tempdir)
def from_pcm(cls, filename, pcmreader,
compression=None, total_pcm_frames=None):
"""encodes a new file from PCM data
takes a filename string, PCMReader object,
optional compression level string and
optional total_pcm_frames integer
encodes a new audio file from pcmreader's data
at the given filename with the specified compression level
and returns a new VorbisAudio object"""
from audiotools import (BufferedPCMReader,
__default_quality__,
EncodingError)
from audiotools.encoders import encode_vorbis
if (((compression is None) or
(compression not in cls.COMPRESSION_MODES))):
compression = __default_quality__(cls.NAME)
if ((pcmreader.channels > 2) and (pcmreader.channels <= 8)):
channel_mask = int(pcmreader.channel_mask)
if ((channel_mask != 0) and
(channel_mask not in
(0x7, # FR, FC, FL
0x33, # FR, FL, BR, BL
0x37, # FR, FC, FL, BL, BR
0x3f, # FR, FC, FL, BL, BR, LFE
0x70f, # FL, FC, FR, SL, SR, BC, LFE
0x63f))): # FL, FC, FR, SL, SR, BL, BR, LFE
raise UnsupportedChannelMask(filename, channel_mask)
try:
encode_vorbis(filename,
BufferedPCMReader(pcmreader),
float(compression) / 10)
return VorbisAudio(filename)
except (ValueError, IOError), err:
cls.__unlink__(filename)
raise EncodingError(str(err))
def from_wave(cls, filename, wave_filename, compression=None):
wave = WaveAudio(wave_filename)
if (wave.bits_per_sample() not in (8,16)):
raise UnsupportedBitsPerSample()
(head,tail) = wave.pcm_split()
if (len(tail) > 0):
blocks = [head,None,tail]
else:
blocks = [head,None]
import audiotools.encoders
try:
audiotools.encoders.encode_shn(filename=filename,
pcmreader=wave.to_pcm(),
block_size=256,
verbatim_chunks=blocks)
return cls(filename)
except IOError:
raise EncodingError("shn")
def from_pcm(cls, filename, pcmreader, compression=None):
"""Encodes a new file from PCM data.
Takes a filename string, PCMReader object
and optional compression level string.
Encodes a new audio file from pcmreader's data
at the given filename with the specified compression level
and returns a new WavPackAudio object."""
from . import encoders
if ((compression is None)
or (compression not in cls.COMPRESSION_MODES)):
compression = __default_quality__(cls.NAME)
try:
encoders.encode_wavpack(filename, BufferedPCMReader(pcmreader),
**cls.__options__[compression])
return cls(filename)
except (ValueError, IOError), msg:
cls.__unlink__(filename)
raise EncodingError(str(msg))
def from_pcm(cls,
filename,
pcmreader,
compression=None,
total_pcm_frames=None):
"""encodes a new file from PCM data
takes a filename string, PCMReader object,
optional compression level string and
optional total_pcm_frames integer
encodes a new audio file from pcmreader's data
at the given filename with the specified compression level
and returns a new MP3Audio object"""
from audiotools import (PCMConverter, BufferedPCMReader, ChannelMask,
__default_quality__, EncodingError)
from audiotools.encoders import encode_mp3
if (((compression is None)
or (compression not in cls.COMPRESSION_MODES))):
compression = __default_quality__(cls.NAME)
try:
encode_mp3(
filename,
BufferedPCMReader(
PCMConverter(pcmreader,
sample_rate=pcmreader.sample_rate,
channels=min(pcmreader.channels, 2),
channel_mask=ChannelMask.from_channels(
min(pcmreader.channels, 2)),
bits_per_sample=16)), compression)
return MP3Audio(filename)
except (ValueError, IOError), err:
cls.__unlink__(filename)
raise EncodingError(str(err))
def from_wave(cls, filename, header, pcmreader, footer, compression=None,
encoding_function=None):
"""encodes a new file from wave data
takes a filename string, header string,
PCMReader object, footer string
and optional compression level string
encodes a new audio file from pcmreader's data
at the given filename with the specified compression level
and returns a new WaveAudio object
header + pcm data + footer should always result
in the original wave file being restored
without need for any padding bytes
may raise EncodingError if some problem occurs when
encoding the input file"""
from audiotools.encoders import encode_wavpack
from audiotools import BufferedPCMReader
from audiotools import CounterPCMReader
from audiotools.wav import (validate_header, validate_footer)
from audiotools import EncodingError
from audiotools import __default_quality__
if (((compression is None) or
(compression not in cls.COMPRESSION_MODES))):
compression = __default_quality__(cls.NAME)
# ensure header is valid
try:
(total_size, data_size) = validate_header(header)
except ValueError as err:
raise EncodingError(str(err))
counter = CounterPCMReader(pcmreader)
try:
(encode_wavpack if encoding_function is None
else encoding_function)(filename,
BufferedPCMReader(counter),
wave_header=header,
wave_footer=footer,
**cls.__options__[compression])
counter.close()
data_bytes_written = counter.bytes_written()
# ensure output data size matches the "data" chunk's size
if (data_size != data_bytes_written):
from audiotools.text import ERR_WAV_TRUNCATED_DATA_CHUNK
raise EncodingError(ERR_WAV_TRUNCATED_DATA_CHUNK)
# ensure footer validates correctly
try:
validate_footer(footer, data_bytes_written)
except ValueError as err:
raise EncodingError(str(err))
# ensure total size is correct
if ((len(header) + data_size + len(footer)) != total_size):
from audiotools.text import ERR_WAV_INVALID_SIZE
raise EncodingError(ERR_WAV_INVALID_SIZE)
return cls(filename)
except (ValueError, IOError) as msg:
counter.close()
cls.__unlink__(filename)
raise EncodingError(str(msg))
except Exception as err:
counter.close()
cls.__unlink__(filename)
raise err
