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import subprocess, tempfile, threading
decoders = {}
encoders = {}
class DecoderMeta(type):
def __init__(cls, name, bases, dict):
if not name in ('Decoder', 'Codec'):
decoders[cls.decoder_name] = cls
class Decoder(object):
__metaclass__ = DecoderMeta
class EncoderMeta(type):
def __init__(cls, name, bases, dict):
if not name in ('Encoder', 'Codec'):
encoders[cls.encoder_name] = cls
class Encoder(object):
__metaclass__ = EncoderMeta
class CodecMeta(DecoderMeta, EncoderMeta):
def __init__(cls, name, bases, dict):
DecoderMeta.__init__(cls, name, bases, dict)
EncoderMeta.__init__(cls, name, bases, dict)
class Codec(object):
__metaclass__ = CodecMeta
# end of metastuff
class FFmpeg(Codec):
decoder_name = 'ffmpeg'
encoder_name = 'ffmpeg'
def decode(self, source, dest, *args):
ret = subprocess.call((x.format(infile = source, outfile = dest) for x in 'ffmpeg -loglevel quiet -i {infile} -y {outfile}'.split()))
print 'decoding returned', ret
def encode(self, source, dest, *args):
ret = subprocess.call((x.format(infile = source, outfile = dest) for x in 'ffmpeg -loglevel quiet -i {infile} -y {outfile}'.split()))
print 'encoding returned', ret
def recode(self, source, dest, *args):
ret = subprocess.call((x.format(infile = source, outfile = dest) for x in 'ffmpeg -loglevel quiet -i {infile} -y {outfile}'.split()))
print 'recoding returned', ret
class Recoder(object):
def __init__(self, decoder, encoder):
self.decoder = decoder
self.encoder = encoder
def recode(self, source, dest):
if self.decoder.__class__ == self.encoder.__class__ and hasattr(self.decoder, 'recode'):
print 'recoding'
print self.decoder
self.decoder.recode(source, dest)
else:
temp = tempfile.NamedTemporaryFile(mode = 'wb', prefix = 'foo', suffix = os.path.splitext(dest)[1], delete = True)
print 'decoding'
self.decoder.decode(source, temp.name)
print 'encoding'
self.encoder.encode(temp.name, dest)
temp.close()
class RecodeThread(threading.Thread):
lock = threading.Lock()
queue = []
running = False
def get_job(self):
return self.queue.pop(0) if len(self.queue) else None
def run(self):
self.lock.acquire()
job = self.get_job()
while job:
self.lock.release()
func, decoder, encoder, sessionid = job
func(decoder, encoder, sessionid)
self.lock.acquire()
job = self.get_job()
RecodeThread.running = False
self.lock.release()
@classmethod
def add(cls, job):
cls.lock.acquire()
cls.queue.append(job)
if not cls.running:
cls.running = True
RecodeThread().start()
cls.lock.release()
if __name__ == '__main__':
import sys
ffmpeg = FFmpeg()
print ffmpeg
r = Recoder(ffmpeg, ffmpeg)
r.recode(sys.argv[1], sys.argv[2])
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