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jack_workers.py
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jack_workers.py
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### jack_workers: worker functions for
### jack - extract audio from a CD and encode it using 3rd party software
### Copyright (C) 1999-2004 Arne Zellentin <[email protected]>
### This program 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 2 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 General Public License for more details.
### You should have received a copy of the GNU General Public License
### along with this program; if not, write to the Free Software
### Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
import sndhdr
import signal
import string
import posix
import array
import fcntl
import wave
import time
import pty
import sys
import os
import jack_functions
import jack_ripstuff
import jack_helpers
import jack_targets
import jack_utils
import jack_tag
from jack_globals import *
from jack_helpers import helpers
from jack_init import F_SETFL, O_NONBLOCK
def default_signals():
signal.signal(signal.SIGTERM, signal.SIG_DFL)
signal.signal(signal.SIGINT, signal.SIG_DFL)
signal.signal(signal.SIGQUIT, signal.SIG_DFL)
signal.signal(signal.SIGHUP, signal.SIG_DFL)
signal.signal(signal.SIGWINCH, signal.SIG_DFL)
def start_new_process(args, nice_value = 0):
"start a new process in a pty and renice it"
data = {}
data['start_time'] = time.time()
pid, master_fd = pty.fork()
if pid == CHILD:
default_signals()
if nice_value:
os.nice(nice_value)
os.execvp(args[0], [a.encode(cf['_charset'], "replace") for a in args])
else:
data['pid'] = pid
if os.uname()[0] == "Linux":
fcntl.fcntl(master_fd, F_SETFL, O_NONBLOCK)
data['fd'] = master_fd
data['file'] = os.fdopen(master_fd)
data['cmd'] = args
data['buf'] = ""
data['otf'] = 0
data['percent'] = 0
data['elapsed'] = 0
return data
def start_new_ripper(track, ripper):
"start a new DAE process"
helper = helpers[cf['_ripper']]
cmd = string.split(helper['cmd'])
args = []
for i in cmd:
if i == "%n": args.append(`track[NUM]`)
elif i == "%o": args.append(track[NAME].decode(cf['_charset'], "replace") + ".wav")
elif i == "%d": args.append(cf['_cd_device'])
else: args.append(i)
data = start_new_process(args)
data['type'] = "ripper"
data['prog'] = cf['_ripper']
data['track'] = track
return data
def start_new_encoder(track, encoder):
"start a new encoder process"
helper = helpers[cf['_encoder']]
if cf['_vbr']:
cmd = string.split(helper['vbr-cmd'])
else:
cmd = string.split(helper['cmd'])
args = []
for i in cmd:
if i == "%r":
args.append(`track[RATE] * helper['bitrate_factor']`)
elif i == "%q":
if helper.has_key('inverse-quality') and helper['inverse-quality']:
quality = min(9, 10 - cf['_vbr_quality'])
else:
quality = cf['_vbr_quality']
args.append("%.3f" % quality)
elif i == "%i":
args.append(track[NAME].decode(cf['_charset'], "replace") + ".wav")
elif i == "%o":
args.append(track[NAME].decode(cf['_charset'], "replace") + jack_targets.targets[jack_helpers.helpers[cf['_encoder']]['target']]['file_extension'])
else:
if jack_targets.targets[helper['target']]['can_pretag']:
if i == "%t":
if jack_tag.track_names:
args.append(jack_tag.track_names[track[NUM]][1])
else:
args.append("")
elif i == "%a":
if jack_tag.track_names:
if jack_tag.track_names[track[NUM]][0]:
args.append(jack_tag.track_names[track[NUM]][0])
else:
args.append(jack_tag.track_names[0][0])
else:
args.append("")
elif i == "%n":
args.append(`track[NUM]`)
elif i == "%l":
if jack_tag.track_names:
args.append(jack_tag.track_names[0][1])
else:
args.append("")
elif i == "%G":
if cf['_id3_genre'] >= 0: args.append(cf['_id3_genre'])
else: args.append('255')
elif i == "%g":
if cf['_id3_genre'] >= 0: args.append(jack_tag.genretxt)
else: args.append('Unknown')
elif i == "%y":
if cf['_id3_year'] > 0:
args.append(`cf['_id3_year']`)
else:
args.append('0')
else:
args.append(i)
else:
args.append(i)
data = start_new_process(args, cf['_nice_value'])
data['type'] = "encoder"
data['prog'] = cf['_encoder']
data['track'] = track
return data
def start_new_otf(track, ripper, encoder):
"start a new ripper/encoder pair for on-the-fly encoding"
data = {}
data['rip'] = {}
data['enc'] = {}
data['rip']['otf'] = 1
data['enc']['otf'] = 1
enc_in, rip_out = os.pipe()
data['rip']['fd'], rip_err = os.pipe()
data['enc']['fd'], enc_err = os.pipe()
args = []
for i in string.split(helpers[ripper]['otf-cmd']):
if i == "%n": args.append(`track[NUM]`)
elif i == "%d": args.append(cf['_cd_device'])
else: args.append(i)
data['rip']['start_time'] = time.time()
pid = os.fork()
if pid == CHILD:
default_signals()
os.dup2(rip_out, STDOUT_FILENO)
os.dup2(rip_err, STDERR_FILENO)
os.close(rip_out)
os.close(rip_err)
os.execvp(args[0], args)
# child won't see anything below...
os.close(rip_out)
os.close(rip_err)
data['rip']['pid'] = pid
data['rip']['cmd'] = helpers[cf['_ripper']]['otf-cmd']
data['rip']['buf'] = ""
data['rip']['percent'] = 0
data['rip']['elapsed'] = 0
data['rip']['type'] = "ripper"
data['rip']['prog'] = cf['_ripper']
data['rip']['track'] = track
if cf['_vbr']:
cmd = string.split(helpers[cf['_encoder']]['vbr-otf-cmd'])
else:
cmd = string.split(helpers[cf['_encoder']]['otf-cmd'])
args = []
for i in cmd:
if i == "%r":
args.append(`track[RATE] * helpers[cf['_encoder']]['bitrate_factor']`)
elif i == "%q":
if helper.has_key('inverse-quality') and helper['inverse-quality']:
quality = min(9, 10 - cf['_vbr_quality'])
else:
quality = cf['_vbr_quality']
args.append("%.3f" % quality)
elif i == "%o":
args.append(track[NAME].decode(cf['_charset'], "replace") + jack_targets.targets[jack_helpers.helpers[cf['_encoder']]['target']]['file_extension'])
elif i == "%d":
args.append(cf['_cd_device'])
else:
args.append(i)
data['enc']['start_time'] = time.time()
pid = os.fork()
if pid == CHILD:
default_signals()
if cf['_nice_value']:
os.nice(cf['_nice_value'])
os.dup2(enc_in, STDIN_FILENO)
os.dup2(enc_err, STDERR_FILENO)
os.close(enc_in)
os.close(enc_err)
os.execvp(args[0], args)
# child won't see anything below...
os.close(enc_in)
os.close(enc_err)
data['enc']['pid'] = pid
data['enc']['otf-pid'] = data['rip']['pid']
data['enc']['cmd'] = cmd
data['enc']['buf'] = ""
data['enc']['percent'] = 0
data['enc']['elapsed'] = 0
data['enc']['type'] = "encoder"
data['enc']['prog'] = cf['_encoder']
data['enc']['track'] = track
data['rip']['otf-pid'] = data['enc']['pid']
if os.uname()[0] == "Linux":
fcntl.fcntl(data['rip']['fd'], F_SETFL, O_NONBLOCK)
fcntl.fcntl(data['enc']['fd'], F_SETFL, O_NONBLOCK)
data['rip']['file'] = os.fdopen(data['rip']['fd'])
data['enc']['file'] = os.fdopen(data['enc']['fd'])
return data
def ripread(track, offset = 0):
"rip one track from an image file."
data = {}
start_time = time.time()
pid, master_fd = pty.fork() # this could also be done with a pipe, anyone?
if pid == CHILD:
#debug:
#so=open("/tmp/stdout", "w")
#sys.stdout = so
#se=open("/tmp/stderr", "w+")
#sys.stderr = se
default_signals()
# FIXME: all this offset stuff has to go, track 0 support has to come.
print ":fAE: waiting for status report..."
sys.stdout.flush()
hdr = sndhdr.whathdr(cf['_image_file'])
my_swap_byteorder = cf['_swap_byteorder']
my_offset = offset
if hdr:
## I guess most people use cdparanoia 1- (instead of 0- if applicable)
## for image creation, so for a wav file use:
image_offset = -offset
else:
if string.upper(cf['_image_file'])[-4:] == ".CDR":
hdr = ('cdr', 44100, 2, -1, 16) # Unknown header, assuming cdr
#
## assume old cdrdao which started at track 1, not at block 0
image_offset = -offset
elif string.upper(cf['_image_file'])[-4:] == ".BIN":
hdr = ('bin', 44100, 2, -1, 16) # Unknown header, assuming bin
#
## assume new cdrdao which starts at block 0, byteorder is reversed.
my_swap_byteorder = not my_swap_byteorder
image_offset = 0
elif string.upper(cf['_image_file'])[-4:] == ".RAW":
hdr = ('bin', 44100, 2, -1, 16) # Unknown header, assuming raw
image_offset = 0
else:
debug("unsupported image file " + cf['_image_file'])
posix._exit(4)
expected_filesize = jack_functions.tracksize(jack_ripstuff.all_tracks)[CDR] + CDDA_BLOCKSIZE * offset
#
## WAVE header is 44 Bytes for normal PCM files...
#
if hdr[0] == 'wav':
expected_filesize = expected_filesize + 44
if abs(jack_utils.filesize(cf['_image_file']) - expected_filesize) > CDDA_BLOCKSIZE:
# we *do* allow a difference of one frame
debug("image file size mismatch, aborted. %d != %d" % (jack_utils.filesize(cf['_image_file']), expected_filesize))
posix._exit(1)
elif hdr[0] == 'wav' and (hdr[1], hdr[2], hdr[4]) != (44100, 2, 16):
debug("unsupported WAV, need CDDA_fmt, aborted.")
posix._exit(2)
elif hdr[0] not in ('wav', 'cdr', 'bin'):
debug("unsupported: " + hdr[0] + ", aborted.")
posix._exit(3)
else:
f = open(cf['_image_file'], 'r')
#
## set up output wav file:
#
wav = wave.open(track[NAME] + ".wav", 'w')
wav.setnchannels(2)
wav.setsampwidth(2)
wav.setframerate(44100)
wav.setnframes(0)
wav.setcomptype('NONE', 'not compressed')
#
## calculate (and seek to) position in image file
#
track_start = (track[START] + image_offset) * CDDA_BLOCKSIZE
if hdr[0] == 'wav':
track_start = track_start + 44
f.seek(track_start)
#
## copy / convert the stuff
#
for i in range(0, track[LEN]):
buf = array.array("h")
buf.fromfile(f, 1176) # CDDA_BLOCKSIZE / 2
if not my_swap_byteorder: # this is inverted as WAVE swabs them anyway.
buf.byteswap()
wav.writeframesraw(buf.tostring())
if i % 1000 == 0:
print ":fAE: Block " + `i` + "/" + `track[LEN]` + (" (%2i%%)" % (i * 100 / track[LEN]))
sys.stdout.flush()
wav.close()
f.close()
stop_time = time.time()
read_speed = track[LEN] / CDDA_BLOCKS_PER_SECOND / ( stop_time - start_time )
if read_speed < 100:
print "[%2.0fx]" % read_speed,
else:
print "[99x]",
if hdr[0] in ('bin', 'wav'):
print "[ - read from image - ]"
else:
print "[cdr-WARNING, check byteorder !]"
sys.stdout.flush()
posix._exit(0)
else: # we are not the child
data['start_time'] = start_time
data['pid'] = pid
data['fd'] = master_fd
data['file'] = os.fdopen(master_fd)
data['cmd'] = ""
data['buf'] = ""
data['type'] = "image_reader"
data['prog'] = "builtin"
data['track'] = track
data['percent'] = 0
data['otf'] = 0
data['elapsed'] = 0
return data