Re: [Sndobj-devel] Python SNdIO /Core Audio SetSr

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I have the impression the sampling rate is
not being set to 22050, so the object does not
get fully constructed (cf. SndCoreAudio.cpp ln.167).
Try running ErrorMessage() just after construction
to see if there are any error messages.

I am wondering why. I'll check tomorrow when I get
to work.

Victor

>
> I'll investigate.
>
> Victor
>
> >
> >
> > SndRTIO seems to give much the same results:
> > with
> > outp =sndobj.SndRTIO(2, 256, 512, 4, 2, objsp,  256,
> > 22050.0 ) I get
> >
> > 22050.0 256
> > Python(834,0xa000d000) malloc: ***  Deallocation of a
> > pointer not malloced: 0x613168; This could be a double
> > free(), or free() called with the middle of an allocated
> > block; Try setting environment variable MallocHelp to
> > see tools to help debug
> > Python(834,0xa000d000) malloc: ***  Deallocation of a
> > pointer not malloced: 0x709480; This could be a double
> > free(), or free() called with the middle of an allocated
> > block; Try setting environment variable MallocHelp to
> > see tools to help debug
> > Python(834,0xa000d000) malloc: ***  Deallocation of a
> > pointer not malloced: 0x7bdcf0; This could be a double
> > free(), or free() called with the middle of an allocated
> > block; Try setting environment variable MallocHelp to
> > see tools to help debug
> >
> > And with
> > outp =sndobj.SndRTIO(2, 256, 512, 4, 2, objsp,  256,
> > 22050.0 ,1) and with other variants as before
> >
> > I get
> >
> > Traceback (most recent call last):
> >   File "aif.py", line 21, in <module>
> >     outp =sndobj.SndRTIO(2, 256, 512, 4, 2, objsp,  256,
> > 22050.0,0xFFFFFFFF)
> >   File
> > "/Users/edh/Contracts/StAndrews_1/sndobj/sndobj.py" ,
> >     line 2829, in __init__ this =
> > _sndobj.new_SndRTIO(*args) NotImplementedError: Wrong
> > number of arguments for overloaded function
> >   'new_SndRTIO'. Possible C/C++ prototypes are:
> >     SndRTIO(short,int,int,int,int,SndObj **,int,float
> >     ,int) SndRTIO(short,int,int,int,int,SndObj **,int
> >     ,float) SndRTIO(short,int,int,int,int,SndObj **,int)
> >     SndRTIO(short,int,int,int,int,SndObj **)
> >     SndRTIO(short,int,int,int,int)
> >     SndRTIO(short,int,int,int)
> >     SndRTIO(short,int,int)
> >     SndRTIO(short,int)
> >     SndRTIO()
> >     SndRTIO(short,SndObj **)
> >     SndRTIO(short)
> >     SndRTIO(SndObj *)
> >     SndRTIO(SndObj *,SndObj *)
> >
> >
> > On 8/10/07, Victor Lazzarini <vic...@nu...>
> > wrote: >
> > > Another thing you can try straight away is to
> > > use SndRTIO, which on OSX is effectively SndCoreAudio,
> > > but with the important difference that its constructor
> > > is
> > >
> > > SndRTIO(short ch, int mode, int bsize = DEF_BSIZE,
> > > int period = DEF_PERIOD, int encoding = SHORTSAM,
> > > SndObj** input=0, int vsize= DEF_VECSIZE, float
> > > sr=DEF_SR, int dev = DEF_DEV)
> > >
> > > without any Uint32 (in fact, there is a slight bug in
> > > there in that the conversion from int to uint is not
> > > handled, but I can fix that if there is a problem).
> > >
> > > Victor
> > >
> > > >
> > > > Problem is the constructor  still expects 8 args not
> > > > the 7 you suggest I introduced the sndobj.SND_OUTPUT
> > > > argument to provide the 8th. I think this is a
> > > > prototyping issue in SWIG though my close
> > > > familiarity with SWIG predates the C++ extensions.
> > > > However I note the the cpp source constructor is
> > > > SndCoreAudio::SndCoreAudio(int channels,int
> > > >                bufframes, int buffnos, float norm,
> > > > SndObj** inObjs, UInt32 dev,  int vecsize, float sr)
> > > i.e. 8 args the 6th being the device. >
> > > > The python traceback remains as follows irrespective
> > > > of whether 7 or 8 args are provided or whether
> > > > sndobj.SND_OUTPUT or a python int is passed.
> > > >
> > > >
> > > > File "aif.py", line 20, in <module>
> > > >     outp = sndobj.SndCoreAudio(2, 512, 4, 32767.0,
> > > > objsp, 256, 22050.0) #wrong args number
> > > >   File
> > > > "/Users/edh/Contracts/StAndrews_1/sndobj/sndobj.py"
> > > >     , line 2803, in __init__ this =
> > > > _sndobj.new_SndCoreAudio(*args) NotImplementedError:
> > > > Wrong number of arguments for overloaded function
> > > >   'new_SndCoreAudio'. Possible C/C++ prototypes are:
> > > >     SndCoreAudio(int,int,int,float,SndObj **,UInt32
> > > > ,int ,float)
> > > >     SndCoreAudio(int,int,int,float,SndObj **,UInt32
> > > >     ,int) SndCoreAudio(int,int,int,float,SndObj **
> > > >     ,UInt32) SndCoreAudio(int,int,int,float,SndObj
> > > >     **) SndCoreAudio(int,int,int,float)
> > > >     SndCoreAudio(int,int,int)
> > > >     SndCoreAudio(int,int)
> > > >     SndCoreAudio(int)
> > > >     SndCoreAudio()
> > > >
> > > > I suspect that the constructor is looking for a C++
> > > > Uint32 in the 6th argument but where to pick an
> > > > appropriate one from?
> > > >
> > > > if sndobj.DEF_DEV is substituted for the 6th arg the
> > > > following traceback is obtained:
> > > > 22050.0 256 which is reasonable enough as this is
> > > > another function reference.
> > > >
> > > > Python(620,0xa000d000) malloc: ***  Deallocation of
> > > > a pointer not malloced: 0x613158; This could be a
> > > > double free(), or free() called with the middle of
> > > > an allocated block; Try setting environment variable
> > > > MallocHelp to see tools to help debug
> > > > Python(620,0xa000d000) malloc: *** Deallocation of a
> > > > pointer not malloced: 0x709458; This could be a
> > > > double free(), or free() called with the middle of
> > > > an allocated block; Try setting environment variable
> > > > MallocHelp to see tools to help debug
> > > > Python(620,0xa000d000) malloc: ***  Deallocation of
> > > > a pointer not malloced: 0x7bdcf0; This could be a
> > > > double free(), or free() called with the middle of
> > an allocated block; Try setting environment variable
> > > > MallocHelp to see tools to help debug
> > > >
> > > > I can't see anything obvious in SndCoreAudio.h or
> > > > AudioDefs.i Ed
> > > >
> > > > On 8/10/07, Victor Lazzarini
> > > > > > <vic...@nu... wrote: Try
> > > > >
> > > > > outp = sndobj.SndCoreAudio(2, 512, 4, 32767.0,
> > > > > objsp ,256, 22050.0)
> > > > >
> > > > > There is no sndobj.SND_OUTPUT argument for
> > > > > SndCoreAudio (it always opens full-duplex).
> > > > >
> > > > > Victor
> > > > >
> > > > >
> > > > > >
> > > > > > Thanks for the pointer to the solution however
> > > > > >
> > > > > > now I've removed the constructor
> > > > > >
> > > > > > outp = sndobj.SndCoreAudio()
> > > > > >
> > > > > > and after  constructing aif1,aif2 replaced it
> > > > > with >
> > > > > > objs[0]=aif1
> > > > > > objs[1]=aif2
> > > > > > objsp = objs.cast()
> > > > > > outp = sndobj.SndCoreAudio(2, 512, 4, 32767.0,
> > > > > > objsp) which as expected still produces output
> > > > > > at the wrong sampling rate however if I extend
> > > > > > this to outp = sndobj.SndCoreAudio(2, 512, 4,
> > > > > > 32767.0, objsp , sndobj.SND_OUTPUT, 256, 22050)
> > > > > > or
> > > > > > outp = sndobj.SndCoreAudio(2, 512, 4, 32767.0,
> > > > > > objsp , 1) or variants in between I get
> > > > > tracebacks similar to this >
> > > > > > File "aif.py", line 20, in <module>
> > > > > >     outp = sndobj.SndCoreAudio(2, 512, 4,
> > > > > > 32767.0, objsp, 1) #, 256, 22050) #wrong args
> > > > > >   number File
> > > > > >
> > > > > >
> > "/Users/edh/Contracts/StAndrews_1/sndobj/sndobj.py" ,
> > > > > > line 2803, in __init__ this =
> > > > > > _sndobj.new_SndCoreAudio(*args)
> > NotImplementedError: Wrong number of arguments for
> > > > > >   overloaded function 'new_SndCoreAudio'.
> > > > > >     Possible C/C++ prototypes are:
> > > > > > SndCoreAudio(int,int,int ,float,SndObj **,UInt32
> > > > > >     ,int ,float) SndCoreAudio(int,int,int,float
> > > > > >     ,SndObj ** ,UInt32 ,int) SndCoreAudio(int
> > > > > >     ,int,int,float ,SndObj ** ,UInt32)
> > > > > >     SndCoreAudio(int,int,int ,float,SndObj **)
> > > > > >     SndCoreAudio(int,int,int ,float)
> > > > > >     SndCoreAudio(int,int,int) SndCoreAudio(int
> > > > > >     ,int) SndCoreAudio(int)
> > > > > >     SndCoreAudio()
> > > > > >
> > > > > > Best
> > > > > >  Ed
> > > > > >
> > > > > > On 8/9/07, Victor Lazzarini
> > > > > > > <vic...@nu...> wrote: You will
> > > > > > > need to set the SR on all objects to 22050. It
> > > > > > > is generally the last argument (which defaults
> > > > > > > to 44100) of each object. You have done it
> > > > > > > with all SndObjs, but it looks like you left
> > > > > > > the SndCoreAudio to its default. You need to
> > > > > > create it with the right SR. >
> > > > > > > Victor
> > > > > > >
> > > > > > > >
> > > > > > > > Hi
> > > > > > > > I've been tinkering with PySndObj on the Mac
> > > > > > > > . BTW it built out of the box for python 2.5
> > > > > > > > with the MacPython framework and appropriate
> > > > > > > > build switches to build the python wrapper.
> > > > > > > > The examples work OK as does the I have now
> > > > > > > > got  to the point where I'm able to read an
> > > > > > > > AIF file and providing it's a PCM file get
> > > > > > > > it to play back OK apart from when the
> > > > > > > > sampling rate is not the default 44100. In
> > > > > > > > the case in question it is 22050 but it
> > > > > > > > plays back as if 44100. (Thanks BTW to the
> > > > > > > > wav file example post) I have tried the
> > > > > > > > commented options shown in the code below,
> > > > > > > > I'm new to the API so I'm not sure if this
> > > > > > > is a bug or I'm not setting the sampling rate
> > > > > > > > in the right place. So suggestions welcomed.
> > > > > > > > The example file is in the
> > > > > > > > /Developer/Examples/Java/Sound source tree.
> > > > > > > > > import sndobj fn = ' 22-new.aif' #fn =
> > > > > > > > 'sound.aif' af = sndobj.SndAiff(fn
> > > > > > > > ,sndobj.READ,2) sr = af.GetSr() vs =
> > > > > > > > af.GetVectorSize () print sr,vs
> > > > > > > > T1 = sndobj.SndThread()
> > > > > > > > sndin = sndobj.SndIn(af,1)
> > > > > > > > outp = sndobj.SndCoreAudio()
> > > > > > > > aif1 = sndobj.SndIn(af,1)
> > > > > > > > #aif1 = sndobj.SndIn(af,1,vs,sr)
> > > > > > > > #aif1.SetSr(sr)
> > > > > > > > aif2 = sndobj.SndIn(af,2)
> > > > > > > > #aif2 = sndobj.SndIn (af,2, vs, sr)
> > > > > > > > #aif2.SetSr(sr)
> > > > > > > > outp.SetOutput(1,aif1)
> > > > > > > > outp.SetOutput(2,aif2)
> > > > > > > > T1.AddObj(af,sndobj.SNDIO_IN)
> > > > > > > > T1.AddObj(aif1)
> > > > > > > > T1.AddObj(aif2)
> > > > > > > > T1.AddObj(outp,sndobj.SNDIO_OUT)
> > > > > > > > T1.ProcOn()
> > > > > > > > time.sleep (5)
> > > > > > > > T1.ProcOff()
> > > > > > > >
> > > > > > > > TIA
> > > > > > > > Ed
> > > > > > > >
> > > > > > > >
> > > > > > > >
> > > > > >
> > > > > > > >
> > > >
> > > > > >
> >
> > > > > > > >
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