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import sys
from io import StringIO
from . import puremixer
from .music1 import Music
class Sound:
# Mono only
has_sound = has_music = 0 # until initialized
BUFFERTIME = 0.09
FLOPTIME = 0.07
Formats = [
('U8', 8, 0, None),
('S8', 8, 1, None),
('S16_NE', 16, 1, None),
('S16_LE', 16, 1, 'little'),
('S16_BE', 16, 1, 'big'),
('U16_LE', 16, 0, 'little'),
('U16_BE', 16, 0, 'big'),
]
def __init__(self, freq=44100, fmt='S16_NE'):
self.f = None
self.freq = int(freq)
self.format = fmt.upper()
self.params = p = {}
for name, p['bits'], p['signed'], p['byteorder'] in self.Formats:
if name == self.format:
break
else:
print('available sound formats:', file=sys.stderr)
for name, bits, signed, byteorder in self.Formats:
print(' %-8s %s' % (name, nicefmttext(
bits, signed, byteorder)), file=sys.stderr)
sys.exit(2)
import linuxaudiodev
try:
f = linuxaudiodev.open('w')
f.setparameters(self.freq, p['bits'], 1,
getattr(linuxaudiodev, 'AFMT_' + self.format))
except Exception as e:
print("sound disabled: %s: %s" % (
e.__class__.__name__, e), file=sys.stderr)
return
self.f = f
self.mixer = mixer = puremixer.PureMixer(**p)
buffertime = self.BUFFERTIME
self.bufsize = int(mixer.bytespersample*mixer.freq*buffertime +
255.5) & ~ 255
if self.bufsize > f.bufsize():
self.bufsize = f.bufsize()
buffertime = self.bufsize / float(freq)
self.buffertime = buffertime
self.mixer_channels = []
self.mixer_accum = {}
self.has_sound = 1
self.has_music = 1
def close(self):
self.f.close()
self.f = None
def sound(self, f):
return self.mixer.wavesample(f.fopen())
def flop(self):
self.mixer_accum = {}
if self.f is None:
return
for i in range(3):
bufsize = self.bufsize - self.f.obufcount()
if bufsize <= 0:
break
self.f.write(self.mixer.mix(self.mixer_channels, bufsize))
#cnt = getattr(self, 'CNT', 0)
#import time
#print cnt, time.time()
#self.CNT = cnt+1
return self.FLOPTIME
def play(self, sound, lvolume, rvolume):
# volume ignored
if sound not in self.mixer_accum:
self.mixer_channels.append(StringIO(sound))
self.mixer_accum[sound] = 1
def play_musics(self, musics, loop_from):
self.cmusics = musics, loop_from, -1
if self.mixer_channels[:1] != [self]:
self.mixer_channels.insert(0, self)
def read(self, size):
"Provide some more data to self.mixer.poll()."
musics, loop_from, c = self.cmusics
if c < 0:
data = ''
else:
data = musics[c].mixed.decode(self.mixer, size)
if not data:
c += 1
if c >= len(musics): # end
c = loop_from
if c >= len(musics):
return ''
self.cmusics = musics, loop_from, c
try:
mixed = musics[c].mixed
except AttributeError:
mixed = musics[c].mixed = Music(musics[c].freezefilename())
mixed.openchannel()
data = mixed.decode(self.mixer, size)
if 0 < len(data) < size:
data += self.read(size - len(data))
return data
def fadeout(self, millisec):
self.cmusics = [], 0, -1
def imperror():
try:
import linuxaudiodev
except ImportError:
if sys.platform.startswith('linux'):
return 'linuxaudiodev module not installed'
else:
return 'only available on Linux'
def nicefmttext(bits, signed, byteorder):
s = '%s %d bits' % (signed and 'signed' or 'unsigned', bits)
if byteorder:
s += ' %s endian' % byteorder
return s
def htmloptionstext(nameval):
from . import modes
l = ['<font size=-1>Sampling <%s>' % nameval('select', 'fmt')]
for name, bits, signed, byteorder in Sound.Formats:
l.append('<'+nameval('option', 'fmt', name, default='S16_NE')+'>'+
nicefmttext(bits, signed, byteorder))
l+= ['</select> rate ',
'<%s size=5>Hz</font>' % nameval('text', 'freq', default='44100'),
'<br>',
modes.musichtmloptiontext(nameval)]
return '\n'.join(l)
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