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gst/extend/: Revival of the jukebox (and leveller) using 0.10 and gnonlin.

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Original commit message from CVS:
* gst/extend/jukebox.py:
* gst/extend/leveller.py:
* gst/extend/sources.py:
Revival of the jukebox (and leveller) using 0.10 and gnonlin.
Still needs a bit of love, but functionnal enough.
This commit is contained in:
Edward Hervey 2006-09-12 11:14:24 +00:00
parent 422b65fed9
commit de855398a5
4 changed files with 811 additions and 0 deletions
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8
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@ -1,3 +1,11 @@
2006-09-12 Edward Hervey <edward@fluendo.com>
* gst/extend/jukebox.py:
* gst/extend/leveller.py:
* gst/extend/sources.py:
Revival of the jukebox (and leveller) using 0.10 and gnonlin.
Still needs a bit of love, but functionnal enough.
2006-09-10 Edward Hervey <edward@fluendo.com>
Patch by: Rene Stadler <mail@renestadler.de>

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gst/extend/jukebox.py Normal file
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#!/usr/bin/env python
# -*- Mode: Python -*-
# vi:si:et:sw=4:sts=4:ts=4
#
# GStreamer python bindings
# Copyright (C) 2005 Edward Hervey <edward at fluendo dot com>
# Copyright (C) 2005 Thomas Vander Stichele <thomas at apestaart dot org>
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library 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
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
import os
import sys
import pickle
import random as rand
import gobject
import pygst
pygst.require('0.10')
import gst
import utils
from pygobject import gsignal
import sources
from leveller import Leveller
class Jukebox(gst.Bin):
gsignal('done', str)
gsignal('prerolled') # emitted when at least 2 sources are ready
gsignal('changed', str, gobject.TYPE_UINT64) # clocktime, filename
gsignal('looped')
def __init__(self, files, rms=0.2, loops=0, random=False,
caps="audio/x-raw-int,channels=2,rate=44100",
picklepath='level.pck'):
# with pygtk 2.4 this call is needed for the gsignal to work
self.__gobject_init__()
self._target_rms = rms
self._loopsleft = loops
self._loopsdone = 0
self._random = random
self._picklepath = picklepath
self._caps = gst.caps_from_string(caps)
self._files = files[:] # copy
self._levels = {} # filename -> rms, mixin, mixout, length
self._prerolled = False
self._playing = False
self._scani = 0 # index into self._files for scanning
self._playi = 0 # index into self._files for playing
self._lastadded = None # last file added to composition
self._lastposition = long(0) # last position where file was added
if not len(files) > 1:
raise TypeError, 'Must have at least 2 files'
self._composition = gst.element_factory_make("gnlcomposition")
self._composition.connect('pad-added', self._composition_pad_added_cb)
self.add(self._composition)
self._srcpad = None
# load our pickle if it exists
if os.path.exists(self._picklepath):
file = open(self._picklepath)
self._levels = pickle.load(file)
file.close()
# randomize our list if asked for
if self._random:
self._files = rand.sample(self._files, len(self._files))
## public API
def preroll(self):
# scan the first few files and start playing
gst.debug("starting jukebox prerolling")
self._scan()
def start(self):
##
## FIXME : THIS SHOULD'T BE NEEDED !
## USE STATE CHANGES INSTEAD
##
if not self._prerolled:
raise Exception, "baby"
self.set_state(gst.STATE_PAUSED)
## Scanning private methods
def _scan(self):
# start a leveller for a new _toscan file
if self._scani >= len(self._files):
gst.debug("We're done scanning !")
return
file = self._files[self._scani]
self._scani += 1
if file in self._levels.keys():
gst.debug("already did file %s" % file)
self._check_prerolled()
gobject.timeout_add(0, self._scan)
return
gst.debug("creating leveller for %s" % file)
leveller = Leveller(file)
leveller.connect('done', self._leveller_done_cb, file)
gobject.timeout_add(0, leveller.start)
##gobject.idle_add(leveller.iterate)
def _leveller_done_cb(self, l, reason, file):
if reason != sources.EOS:
gst.debug("Error: %s" % reason)
return
gst.debug("in: %s, out: %s" % (gst.TIME_ARGS(l.mixin),
gst.TIME_ARGS(l.mixout)))
gst.debug("rms: %f, %f dB" % (l.rms, l.rmsdB))
# store infos
self._levels[file] = (l.rms, l.mixin, l.mixout, l.length)
gst.debug("writing level pickle")
file = open(self._picklepath, "w")
pickle.dump(self._levels, file)
file.close()
self._check_prerolled()
self._scan()
# clean up leveller after this handler
gobject.timeout_add(0, l.clean)
## GnlSource-related methods
def _new_gnl_source(self, location, start):
"""
Creates a new GnlSource containing an AudioSource with the following
properties correctly set:
_ volume level
_ priority
_ duration
The start position MUST be given
"""
if not self._levels[location]:
return None
self.debug("Creating new GnlSource at %s for %s" % (gst.TIME_ARGS(start), location))
idx = self._files.index(location) + self._loopsdone * len(self._files)
rms, mixin, mixout, duration = self._levels[location]
gnls = gst.element_factory_make("gnlsource", "source-%d-%s" % (idx, location))
src = sources.AudioSource(location)
gnls.add(src)
# set volume
level = 1.0
if rms > self._target_rms:
level = self._target_rms / rms
gst.debug('setting volume of %f' % level)
else:
gst.debug('not going to go above 1.0 level')
src.set_volume(level)
# set proper position/duration/priority in composition
gnls.props.priority = (2 * self._loopsdone) + 1 + (idx % 2)
gnls.props.start = long(start)
gnls.props.duration = long(duration)
gnls.props.media_duration = long(duration)
gnls.props.media_start = long(0)
return gnls
def _new_mixer(self, start, duration):
gnlo = gst.element_factory_make("gnloperation")
ad = gst.element_factory_make("adder")
gnlo.add(ad)
gnlo.props.sinks = 2
gnlo.props.start = start
gnlo.props.duration = duration
gnlo.props.priority = 0
return gnlo
def _append_file(self, location):
"""
Appends the given file to the composition, along with the proper mixer effect
"""
self.debug("location:%s" % location)
start = self._lastposition
if self._lastadded:
start += self._levels[self._lastadded][2]
start -= self._levels[location][1]
gnls = self._new_gnl_source(location, start)
self._composition.add(gnls)
if self._lastadded:
# create the mixer
duration = self._levels[self._lastadded][3] - self._levels[self._lastadded][2] + self._levels[location][1]
mixer = self._new_mixer(start, duration)
self._composition.add(mixer)
self._lastposition = start
self._lastadded = location
self.debug("lastposition:%s , lastadded:%s" % (gst.TIME_ARGS(self._lastposition),
self._lastadded))
def _check_prerolled(self):
gst.debug("_check_prerolled: index: scan %d, play %d" % (
self._scani, self._playi))
if not self._prerolled and self._scani > self._playi + 1:
self._prerolled = True
# add initial sources here
self._append_file(self._files[0])
self._append_file(self._files[1])
self.debug("now prerolled and ready to play")
self.emit('prerolled')
def _emit_changed(self, file, when):
print "emitting changed for %s at %r" % (file, when)
self.emit('changed', file, when)
def _source_clean(self, source):
source.set_state(gst.STATE_NULL)
self.remove(source)
source.clean()
## composition callbacks
def _composition_pad_added_cb(self, comp, pad):
if self._srcpad:
return
self.debug("Ghosting source pad %s" % pad)
self._srcpad = gst.GhostPad("src", pad)
self.add_pad(self._srcpad)
## gst.Bin/Element virtual methods
def do_handle_message(self, message):
self.debug("got message %s / %s / %r" % (message.src.get_name(), message.type.first_value_name, message))
# chaining up
gst.Bin.do_handle_message(self, message)
def do_state_change(self, transition):
if not self._prerolled:
gst.error("Call Jukebox.preroll() before!")
return gst.STATE_CHANGE_FAILURE
# chaining up
return gst.Bin.do_state_change(self, message)
gobject.type_register(Jukebox)
# helper functions
def _find_elements_recurse(element):
if not isinstance(element, gst.Bin):
return [element, ]
l = []
for e in element.elements():
l.extend(_find_elements_recurse(e))
return l
def _find_unconnected_pad(bin, direction):
for e in _find_elements_recurse(bin):
for p in e.pads():
if p.get_direction() == direction and not p.get_peer():
return p
return None
# run us to test
if __name__ == "__main__":
main = gobject.MainLoop()
pipeline = gst.Pipeline('jukebox')
list = open(sys.argv[1]).read().rstrip().split('\n')
print list
#source = Jukebox(list, random=True, loops=-1)
source = Jukebox(list, random=True, loops=1)
def _jukebox_prerolled_cb(jukebox):
print "prerolled"
_start()
def _jukebox_changed_cb(jukebox, filename, when):
print "changed file to %s at %s" % (filename, float(when) / gst.TIME_ARGS(gst.SECOND))
def _jukebox_looped_cb(jukebox):
print "jukebox looped"
def _start():
source.start()
print "setting pipeline to PLAYING"
pipeline.set_state(gst.STATE_PLAYING)
print "set pipeline to PLAYING"
def jukebox_pad_added(comp, pad, sinkpad):
pad.link(sinkpad)
def jukebox_message(bus, message):
if message.type == gst.MESSAGE_ERROR:
print "Error: %s" % message.parse_error()
main.quit()
elif message.type == gst.MESSAGE_EOS:
print "done"
main.quit()
source.connect('prerolled', _jukebox_prerolled_cb)
source.connect('changed', _jukebox_changed_cb)
source.connect('looped', _jukebox_looped_cb)
source.preroll()
pipeline.add(source)
bus = pipeline.get_bus()
bus.add_signal_watch()
bus.connect("message", jukebox_message)
p = "alsasink"
if len(sys.argv) > 2:
p = " ".join(sys.argv[2:])
print "parsing output pipeline %s" % p
sinkbin = gst.parse_launch("bin.( %s )" % p)
pipeline.add(sinkbin)
apad = _find_unconnected_pad(sinkbin, gst.PAD_SINK)
if not apad:
raise TypeError, "No unconnected sink pad found in bin %r" % sinkbin
sinkpad = gst.GhostPad("sink", apad)
sinkbin.add_pad(sinkpad)
source.connect('pad-added', jukebox_pad_added, sinkpad)
print "Going into main loop"
sys.stdout.flush()
main.run()
print "Left main loop"
sys.stdout.flush()
pipeline.set_state(gst.STATE_NULL)

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# -*- Mode: Python -*-
# vi:si:et:sw=4:sts=4:ts=4
#
# GStreamer python bindings
# Copyright (C) 2005 Thomas Vander Stichele <thomas at apestaart dot org>
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library 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
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
import os
import sys
import math
import gobject
import pygst
pygst.require('0.10')
import gst
import utils
from pygobject import gsignal
import sources
from sources import EOS, ERROR, UNKNOWN_TYPE, WRONG_TYPE
class Leveller(gst.Pipeline):
"""
I am a pipeline that calculates RMS values and mix-in/out points.
I will signal 'done' when I'm done scanning the file, with return value
EOS, ERROR, UNKNOWN_TYPE, or WRONG_TYPE from gst.extend.sources
"""
gsignal('done', str)
def __init__(self, filename, threshold=-9.0):
gst.Pipeline.__init__(self)
self._filename = filename
self._thresholddB = threshold
self._threshold = math.pow(10, self._thresholddB / 10.0)
self._source = sources.AudioSource(filename)
self._source.connect('done', self._done_cb)
self._level = gst.element_factory_make("level")
self._fakesink = gst.element_factory_make("fakesink")
self.add(self._source, self._level, self._fakesink)
self._source.connect("pad-added", self._sourcePadAddedCb)
self._level.link(self._fakesink)
# temporary values for each timepoint
self._rmsdB = {} # hash of channel, rmsdB value
self._peakdB = 0.0 # highest value over all channels for this time
# results over the whole file
self._meansquaresums = [] # list of time -> mean square sum value
self._peaksdB = [] # list of time -> peak value
self._lasttime = 0
# will be set when done
self.mixin = 0
self.mixout = 0
self.length = 0
self.rms = 0.0
self.rmsdB = 0.0
def _sourcePadAddedCb(self, source, pad):
self._source.link(self._level)
def do_handle_message(self, message):
self.debug("got message %r" % message)
if (message.type == gst.MESSAGE_ELEMENT) and (message.src == self._level):
struc = message.structure
endtime = struc["endtime"]
rmss = struc["rms"]
peaks = struc["peak"]
decays = struc["decay"]
infos = zip(rmss, peaks, decays)
channid = 0
for rms,peak,decay in infos:
self._level_cb(message.src, endtime, channid, rms, peak, decay)
channid += 1
elif message.type == gst.MESSAGE_EOS:
self._eos_cb(message.src)
# chaining up
gst.Pipeline.do_handle_message(self, message)
def _level_cb(self, element, time, channel, rmsdB, peakdB, decaydB):
# rms is being signalled in dB
# FIXME: maybe level should have a way of signalling actual values
# signals are received in order, so I should get each channel one
# by one
if time > self._lasttime and self._lasttime > 0:
# we have a new time point, so calculate stuff for the old block
meansquaresum = 0.0
for i in self._rmsdB.keys():
meansquaresum += math.pow(10, self._rmsdB[i] / 10.0)
# average over channels
meansquaresum /= len(self._rmsdB.keys())
try:
rmsdBstr = str(10 * math.log10(meansquaresum))
except OverflowError:
rmsdBstr = "(-inf)"
gst.log("meansquaresum %f (%s dB)" % (meansquaresum, rmsdBstr))
# update values
self._peaksdB.append((self._lasttime, peakdB))
self._meansquaresums.append((self._lasttime, meansquaresum))
self._rmsdB = {}
self._peakdB = 0.0
# store the current values for later processing
gst.log("time %s, channel %d, rmsdB %f" % (gst.TIME_ARGS(time), channel, rmsdB))
self._lasttime = time
self._rmsdB[channel] = rmsdB
if peakdB > self._peakdB:
self._peakdB = peakdB
def _done_cb(self, source, reason):
gst.debug("done, reason %s" % reason)
# we ignore eos because we want the whole pipeline to eos
if reason == EOS:
return
self.emit('done', reason)
def _eos_cb(self, source):
gst.debug("eos, start calcing")
# get the highest peak RMS for this track
highestdB = self._peaksdB[0][1]
for (time, peakdB) in self._peaksdB:
if peakdB > highestdB:
highestdB = peakdB
gst.debug("highest peak(dB): %f" % highestdB)
# get the length
(self.length, peakdB) = self._peaksdB[-1]
# find the mix in point
for (time, peakdB) in self._peaksdB:
gst.log("time %s, peakdB %f" % (gst.TIME_ARGS(time), peakdB))
if peakdB > self._thresholddB + highestdB:
gst.debug("found mix-in point of %f dB at %s" % (
peakdB, gst.TIME_ARGS(time)))
self.mixin = time
break
# reverse and find out point
self._peaksdB.reverse()
found = None
for (time, peakdB) in self._peaksdB:
if found:
self.mixout = time
gst.debug("found mix-out point of %f dB right before %s" % (
found, gst.TIME_ARGS(time)))
break
if peakdB > self._thresholddB + highestdB:
found = peakdB
# now calculate RMS between these two points
weightedsquaresums = 0.0
lasttime = self.mixin
for (time, meansquaresum) in self._meansquaresums:
if time <= self.mixin:
continue
delta = time - lasttime
weightedsquaresums += meansquaresum * delta
gst.log("added MSS %f over time %s at time %s, now %f" % (
meansquaresum, gst.TIME_ARGS(delta),
gst.TIME_ARGS(time), weightedsquaresums))
lasttime = time
if time > self.mixout:
break
# calculate
try:
ms = weightedsquaresums / (self.mixout - self.mixin)
except ZeroDivisionError:
# this is possible when, for example, the whole sound file is
# empty
gst.warning('ZeroDivisionError on %s, mixin %s, mixout %s' % (
self._filename, gst.TIME_ARGS(self.mixin),
gst.TIME_ARGS(self.mixout)))
self.emit('done', WRONG_TYPE)
return
self.rms = math.sqrt(ms)
self.rmsdB = 10 * math.log10(ms)
self.emit('done', EOS)
def start(self):
gst.debug("Setting to PLAYING")
self.set_state(gst.STATE_PLAYING)
gst.debug("Set to PLAYING")
# FIXME: we might want to do this ourselves automatically ?
def stop(self):
"""
Stop the leveller, freeing all resources.
Call after the leveller emitted 'done' to clean up.
"""
gst.debug("Setting to NULL")
self.set_state(gst.STATE_NULL)
gst.debug("Set to NULL")
utils.gc_collect('Leveller.stop()')
def clean(self):
# clean ourselves up completely
self.stop()
# let's be ghetto and clean out our bin manually
self.remove(self._source)
self.remove(self._level)
self.remove(self._fakesink)
gst.debug("Emptied myself")
self._source.clean()
utils.gc_collect('Leveller.clean() cleaned up source')
self._source = None
self._fakesink = None
self._level = None
utils.gc_collect('Leveller.clean() done')
gobject.type_register(Leveller)
if __name__ == "__main__":
main = gobject.MainLoop()
try:
leveller = Leveller(sys.argv[1])
except IndexError:
sys.stderr.write("Please give a file to calculate level of\n")
sys.exit(1)
print "Starting"
bus = leveller.get_bus()
bus.add_signal_watch()
dontstop = True
leveller.set_state(gst.STATE_PLAYING)
while dontstop:
message = bus.poll(gst.MESSAGE_ANY, gst.SECOND)
if message:
gst.debug("got message from poll:%s/%r" % (message.type, message))
else:
gst.debug("got NOTHING from poll")
if message:
if message.type == gst.MESSAGE_EOS:
print "in: %s, out: %s, length: %s" % (gst.TIME_ARGS(leveller.mixin),
gst.TIME_ARGS(leveller.mixout),
gst.TIME_ARGS(leveller.length))
print "rms: %f, %f dB" % (leveller.rms, leveller.rmsdB)
dontstop = False
elif message.type == gst.MESSAGE_ERROR:
error,debug = message.parse_error()
print "ERROR[%s] %s" % (error.domain, error.message)
dontstop = False
leveller.stop()
leveller.clean()
gst.debug('deleting leveller, verify objects are freed')
utils.gc_collect('quit main loop')
del leveller
utils.gc_collect('deleted leveller')
gst.debug('stopping forever')

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#!/usr/bin/env python
# -*- Mode: Python -*-
# vi:si:et:sw=4:sts=4:ts=4
#
# GStreamer python bindings
# Copyright (C) 2005 Edward Hervey <edward at fluendo dot com>
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library 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
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
import os
import sys
import gobject
import pygst
pygst.require('0.10')
import gst
from pygobject import gsignal
EOS = 'EOS'
ERROR = 'ERROR'
WRONG_TYPE = 'WRONG_TYPE'
UNKNOWN_TYPE = 'UNKNOWN_TYPE'
class AudioSource(gst.Bin):
"""A bin for audio sources with proper audio converters"""
gsignal('done', str)
gsignal('prerolled')
def __init__(self, filename, caps="audio/x-raw-int,channels=2,rate=44100"):
# with pygtk 2.4 this call is needed for the gsignal to work
gst.Bin.__init__(self)
self.filename = filename
self.outcaps = caps
self.filesrc = gst.element_factory_make("filesrc")
self.filesrc.set_property("location", self.filename)
self.dbin = gst.element_factory_make("decodebin")
self.audioconvert = gst.element_factory_make("audioconvert")
self.audioresample = gst.element_factory_make("audioresample")
self.volume = gst.element_factory_make("volume")
self.add(self.filesrc, self.dbin,
self.audioconvert, self.audioresample, self.volume)
self.filesrc.link(self.dbin)
self.audioconvert.link(self.audioresample)
self.audioresample.link(self.volume, caps)
self.dbin.connect("new-decoded-pad", self._new_decoded_pad_cb)
self.dbin.connect("unknown-type", self._unknown_type_cb)
self._srcpad = None
def __repr__(self):
return "<AudioSource for %s>" % self.filename
def set_volume(self, volume):
gst.debug("setting volume to %f" % volume)
self.volume.set_property("volume", volume)
def _new_decoded_pad_cb(self, dbin, pad, is_last):
gst.debug("new decoded pad: pad %r [%s]" % (pad, pad.get_caps().to_string()))
if not "audio" in pad.get_caps().to_string() or self._srcpad:
return
gst.debug("linking pad %r to audioconvert" % pad)
pad.link(self.audioconvert.get_pad("sink"))
self._srcpad = gst.GhostPad("src", self.volume.get_pad("src"))
self.add_pad(self._srcpad)
def _unknown_type_cb(self, pad, caps):
self.emit('done', UNKNOWN_TYPE)
def stop(self):
self.set_state(gst.STATE_NULL)
def clean(self):
self.stop()
self.remove(self.filesrc)
self.remove(self.dbin)
self.remove(self.audioconvert)
self.remove(self.audioresample)
self.remove(self.volume)
self.filesrc = None
self.dbin = None
self.audioconvert = None
self.volume = None
gobject.type_register(AudioSource)
# run us to test
if __name__ == "__main__":
main = gobject.MainLoop()
def _done_cb(source, reason):
print "Done"
sys.stdout.flush()
if reason != EOS:
print "Some error happened: %s" % reason
main.quit()
def _error_cb(source, element, gerror, message):
print "Error: %s" % gerror
main.quit()
try:
source = AudioSource(sys.argv[1])
except IndexError:
sys.stderr.write("Please give a filename to play\n")
sys.exit(1)
pipeline = gst.Pipeline("playing")
# connecting on the source also catches eos emit when
# no audio pad
source.connect('done', _done_cb)
pipeline.connect('error', _error_cb)
p = "osssink"
if len(sys.argv) > 2:
p = " ".join(sys.argv[2:])
pipeline.add(source)
sink = gst.parse_launch(p)
pipeline.add(sink)
source.link(sink)
# we schedule this as a timeout so that we are definately in the main
# loop when it goes to PLAYING, and errors make main.quit() work correctly
def _start(pipeline):
print "setting pipeline to PLAYING"
pipeline.set_state(gst.STATE_PLAYING)
print "set pipeline to PLAYING"
gobject.timeout_add(0, _start, pipeline)
gobject.idle_add(pipeline.iterate)
print "Going into main loop"
main.run()
print "Left main loop"
pipeline.set_state(gst.STATE_NULL)
pipeline.remove(source)
pipeline.remove(sink)
utils.gc_collect('cleaned out pipeline')
source.clean()
utils.gc_collect('cleaned up source')
source = None
utils.gc_collect('set source to None')