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sink.py
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sink.py
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#!/usr/bin/env python
# This file is part of Xpra.
# Copyright (C) 2010-2013 Antoine Martin <antoine@devloop.org.uk>
# Xpra is released under the terms of the GNU GPL v2, or, at your option, any
# later version. See the file COPYING for details.
import sys, os, time
from xpra.sound.sound_pipeline import SoundPipeline, debug
from xpra.sound.pulseaudio_util import has_pa
from xpra.sound.gstreamer_util import plugin_str, get_decoder_parser, MP3, CODECS, gst
from xpra.os_util import thread
from xpra.log import Logger
log = Logger()
SINKS = ["autoaudiosink"]
DEFAULT_SINK = SINKS[0]
if has_pa():
SINKS.append("pulsesink")
if sys.platform.startswith("darwin"):
SINKS.append("osxaudiosink")
DEFAULT_SINK = "osxaudiosink"
elif sys.platform.startswith("win"):
SINKS.append("directsoundsink")
DEFAULT_SINK = "directsoundsink"
if os.name=="posix":
SINKS += ["alsasink", "osssink", "oss4sink", "jackaudiosink"]
GST_QUEUE_NO_LEAK = 0
GST_QUEUE_LEAK_UPSTREAM = 1
GST_QUEUE_LEAK_DOWNSTREAM = 2
GST_QUEUE_LEAK_DEFAULT = GST_QUEUE_LEAK_DOWNSTREAM
MS_TO_NS = 1000000
QUEUE_LEAK = int(os.environ.get("XPRA_SOUND_QUEUE_LEAK", GST_QUEUE_LEAK_DEFAULT))
if QUEUE_LEAK not in (GST_QUEUE_NO_LEAK, GST_QUEUE_LEAK_UPSTREAM, GST_QUEUE_LEAK_DOWNSTREAM):
log.error("invalid leak option %s", QUEUE_LEAK)
QUEUE_LEAK = GST_QUEUE_LEAK_DEFAULT
QUEUE_TIME = int(os.environ.get("XPRA_SOUND_QUEUE_TIME", "450"))*MS_TO_NS
QUEUE_TIME = max(0, QUEUE_TIME)
DEFAULT_SINK = os.environ.get("XPRA_SOUND_SINK", DEFAULT_SINK)
if DEFAULT_SINK not in SINKS:
log.error("invalid default sound sink: '%s' is not in %s, using %s instead", DEFAULT_SINK, SINKS, SINKS[0])
DEFAULT_SINK = SINKS[0]
QUEUE_SILENT = 0
def sink_has_device_attribute(sink):
return sink not in ("autoaudiosink", "jackaudiosink", "directsoundsink")
class SoundSink(SoundPipeline):
__generic_signals__ = [
"underrun",
"overrun",
"eos"
]
def __init__(self, sink_type=DEFAULT_SINK, options={}, codec=MP3, decoder_options={}):
assert sink_type in SINKS, "invalid sink: %s" % sink_type
decoder, parser = get_decoder_parser(codec)
SoundPipeline.__init__(self, codec)
self.add_signals(self.__generic_signals__)
self.sink_type = sink_type
decoder_str = plugin_str(decoder, decoder_options)
pipeline_els = []
pipeline_els.append("appsrc"+
" name=src"+
" max-bytes=32768"+
" emit-signals=0"+
" block=0"+
" is-live=0"+
" stream-type=stream"+
" format=4")
pipeline_els.append(parser)
pipeline_els.append(decoder_str)
pipeline_els.append("audioconvert")
pipeline_els.append("audioresample")
pipeline_els.append("queue" +
" name=queue"+
" max-size-buffers=0"+
" max-size-bytes=0"+
" max-size-time=%s" % QUEUE_TIME+
" silent=%s" % QUEUE_SILENT+
" leaky=%s" % QUEUE_LEAK)
pipeline_els.append(sink_type)
self.setup_pipeline_and_bus(pipeline_els)
self.src = self.pipeline.get_by_name("src")
self.queue = self.pipeline.get_by_name("queue")
self.overruns = 0
self.queue_state = "starting"
if QUEUE_SILENT==0:
self.queue.connect("overrun", self.queue_overrun)
self.queue.connect("underrun", self.queue_underrun)
self.queue.connect("running", self.queue_running)
self.queue.connect("pushing", self.queue_pushing)
def queue_pushing(self, *args):
ltime = int(self.queue.get_property("current-level-time")/MS_TO_NS)
debug("sound sink queue pushing: level=%s", ltime)
self.queue_state = "pushing"
def queue_running(self, *args):
ltime = int(self.queue.get_property("current-level-time")/MS_TO_NS)
debug("sound sink queue running: level=%s", ltime)
self.queue_state = "running"
def queue_underrun(self, *args):
ltime = int(self.queue.get_property("current-level-time")/MS_TO_NS)
debug("sound sink queue underrun: level=%s", ltime)
self.queue_state = "underrun"
def queue_overrun(self, *args):
ltime = int(self.queue.get_property("current-level-time")/MS_TO_NS)
self.queue_state = "overrun"
#no overruns for the first 2 seconds:
elapsed = time.time()-self.start_time
if elapsed<2.0 or ltime<(QUEUE_TIME/MS_TO_NS/2*75/100):
debug("sound sink queue overrun ignored: level=%s, elapsed time=%.1f", ltime, elapsed)
return
debug("sound sink queue overrun: level=%s", ltime)
self.overruns += 1
self.emit("overrun", ltime)
def cleanup(self):
SoundPipeline.cleanup(self)
self.sink_type = ""
self.src = None
def eos(self):
debug("eos()")
if self.src:
self.src.emit('end-of-stream')
self.cleanup()
def get_info(self):
info = SoundPipeline.get_info(self)
if QUEUE_TIME>0:
clt = self.queue.get_property("current-level-time")
info["queue.used_pct"] = int(min(QUEUE_TIME, clt)*100.0/QUEUE_TIME)
info["queue.overruns"] = self.overruns
info["queue.state"] = self.queue_state
return info
def add_data(self, data, metadata=None):
#debug("sound sink: adding %s bytes to %s, metadata: %s, level=%s", len(data), self.src, metadata, int(self.queue.get_property("current-level-time")/MS_TO_NS))
if not self.src:
return
buf = gst.Buffer(data)
d = 10*MS_TO_NS
if metadata and False:
ts = metadata.get("timestamp")
if ts is not None:
buf.timestamp = ts
d = metadata.get("duration")
if d is not None:
buf.duration = d
debug("add_data(..) queue_state=%s", self.queue_state)
self.push_buffer(buf)
def push_buffer(self, buf):
#buf.size = size
#buf.timestamp = timestamp
#buf.duration = duration
#buf.offset = offset
#buf.offset_end = offset_end
#buf.set_caps(gst.caps_from_string(caps))
r = self.src.emit("push-buffer", buf)
if r!=gst.FLOW_OK:
log.error("push-buffer error: %s", r)
self.emit('error', "push-buffer error: %s" % r)
return False
self.buffer_count += 1
self.byte_count += len(buf.data)
ltime = int(self.queue.get_property("current-level-time")/MS_TO_NS)
debug("sound sink: pushed %s bytes, new buffer level: %sms", len(buf.data), ltime)
return True
def main():
import os.path
import gobject
if len(sys.argv) not in (2, 3):
print("usage: %s filename [codec]" % sys.argv[0])
sys.exit(1)
return
filename = sys.argv[1]
if not os.path.exists(filename):
print("file %s does not exist" % filename)
sys.exit(2)
return
if len(sys.argv)==3:
codec = sys.argv[2]
if codec not in CODECS:
print("invalid codec: %s" % codec)
sys.exit(2)
return
else:
codec = None
parts = filename.split(".")
if len(parts)>1:
extension = parts[-1]
if extension.lower() in CODECS:
codec = extension.lower()
print("guessed codec %s from file extension %s" % (codec, extension))
if codec is None:
print("assuming this is an mp3 file...")
codec = MP3
import logging
logging.basicConfig(format="%(asctime)s %(message)s")
logging.root.setLevel(logging.DEBUG)
f = open(filename, "rb")
data = f.read()
f.close()
print("loaded %s bytes from %s" % (len(data), filename))
#force no leak since we push all the data at once
global QUEUE_LEAK, GST_QUEUE_NO_LEAK, QUEUE_SILENT
QUEUE_LEAK = GST_QUEUE_NO_LEAK
QUEUE_SILENT = 1
ss = SoundSink(codec=codec)
ss.add_data(data)
def eos(*args):
print("eos")
gobject.idle_add(gobject_mainloop.quit)
ss.connect("eos", eos)
ss.start()
gobject_mainloop = gobject.MainLoop()
gobject.threads_init()
import signal
def deadly_signal(*args):
gobject.idle_add(gobject_mainloop.quit)
signal.signal(signal.SIGINT, deadly_signal)
signal.signal(signal.SIGTERM, deadly_signal)
def check_for_end(*args):
qtime = int(ss.queue.get_property("current-level-time")/MS_TO_NS)
if qtime<=0:
log.info("underrun (end of stream)")
thread.start_new_thread(ss.stop, ())
gobject.timeout_add(500, gobject_mainloop.quit)
return False
return True
gobject.timeout_add(1000, check_for_end)
gobject_mainloop.run()
if __name__ == "__main__":
main()