What's the handiest way of finding out the type of a channel? Something like:

int csoundGetChannelType(const char *name);

would be nice? This would return CSOUND_CONTROL_CHANNEL,
CSOUND_AUDIO_CHANNEL or CSOUND_STRING_CHANNEL. I'm sure there are ways
of doing this already, but a little wrapper function would b nice all
the same.

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But wouldn't a simple wrapper function be useful, whereby we would
only need to pass it the string, and the API would do the rest. Would
save us all from writing a whole lot of the same code over and over
again?

On 10 May 2013 16:07, Henrik Andersson  wrote:
> Hi Rory,
>
> Im new to csound since 2 days and have struggled with the api for both cs5
> and cs6 just on your topic. Im currently implementing a music composer that
> will host csound instruments. I think having API for specific channel to get
> type is a not so usable at all, the best approach i have found (cs6) is
> still getting the list of channels and do processing while looping over the
> list. With that in mind i would like to see test defines like:
>
> #define CSOUND_IS_CONTROL_CHANNEL(t) (t & CSOUND_CONTROL_CHANNEL)
>
> if (CSOUND_IS_CONTROL_CHANNEL(chan->type))
>
> What i ment is that the API is kind of limiting, somehow the host needs to
> enumerate the channel names and the only way to do that is by getting the
> list and while your at it, do what you need on the list.
>
> Regards,
>
> Henrik Andersson
>
>
>
>
>
>
> 2013/5/10 Rory Walsh 
>>
>> What's the handiest way of finding out the type of a channel? Something
>> like:
>>
>> int csoundGetChannelType(const char *name);
>>
>> would be nice? This would return CSOUND_CONTROL_CHANNEL,
>> CSOUND_AUDIO_CHANNEL or CSOUND_STRING_CHANNEL. I'm sure there are ways
>> of doing this already, but a little wrapper function would b nice all
>> the same.
>>
>>
>> ------------------------------------------------------------------------------
>> Learn Graph Databases - Download FREE O'Reilly Book
>> "Graph Databases" is the definitive new guide to graph databases and
>> their applications. This 200-page book is written by three acclaimed
>> leaders in the field. The early access version is available now.
>> Download your free book today! http://p.sf.net/sfu/neotech_d2d_may
>> _______________________________________________
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>> Csound-devel@lists.sourceforge.net
>> https://lists.sourceforge.net/lists/listinfo/csound-devel
>
>
>
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So I should just use the channel list I have to get to begin with is
what your saying? Fair enough :)

On 10 May 2013 16:51, Henrik Andersson  wrote:
> Thats true if name is known to host and by now, and by now, as far
> as i have seen, the only way to get the name of a channel is to get
> the channel list.
>
> The issue here is that name is used as key, and the key is unknown
> until you enumerate the available names. Another approach to this is
> having and API like csoundGetChannelName(p, idx) like:
>
> char *name = NULL;
> int idx = 0;
> int type;
>
> while ((name=csoundGetChannelName(p, idx))!=NULL)
> {
>   type = csoundGetChannelType(name);
>   if (type & CSOUND_CONTROL_CHANNEL)
>   {
>     ...
>   }
>   idx++;
> }
>
> With that kind of API your suggestion make sense, but it should not live
> side by side with the csoundListChannels() imho...
>
>
> /Henrik
>
>
>
> 2013/5/10 Rory Walsh 
>>
>> But wouldn't a simple wrapper function be useful, whereby we would
>> only need to pass it the string, and the API would do the rest. Would
>> save us all from writing a whole lot of the same code over and over
>> again?
>>
>> On 10 May 2013 16:07, Henrik Andersson  wrote:
>> > Hi Rory,
>> >
>> > Im new to csound since 2 days and have struggled with the api for both
>> > cs5
>> > and cs6 just on your topic. Im currently implementing a music composer
>> > that
>> > will host csound instruments. I think having API for specific channel to
>> > get
>> > type is a not so usable at all, the best approach i have found (cs6) is
>> > still getting the list of channels and do processing while looping over
>> > the
>> > list. With that in mind i would like to see test defines like:
>> >
>> > #define CSOUND_IS_CONTROL_CHANNEL(t) (t & CSOUND_CONTROL_CHANNEL)
>> >
>> > if (CSOUND_IS_CONTROL_CHANNEL(chan->type))
>> >
>> > What i ment is that the API is kind of limiting, somehow the host needs
>> > to
>> > enumerate the channel names and the only way to do that is by getting
>> > the
>> > list and while your at it, do what you need on the list.
>> >
>> > Regards,
>> >
>> > Henrik Andersson
>> >
>> >
>> >
>> >
>> >
>> >
>> > 2013/5/10 Rory Walsh 
>> >>
>> >> What's the handiest way of finding out the type of a channel? Something
>> >> like:
>> >>
>> >> int csoundGetChannelType(const char *name);
>> >>
>> >> would be nice? This would return CSOUND_CONTROL_CHANNEL,
>> >> CSOUND_AUDIO_CHANNEL or CSOUND_STRING_CHANNEL. I'm sure there are ways
>> >> of doing this already, but a little wrapper function would b nice all
>> >> the same.
>> >>
>> >>
>> >>
>> >> ------------------------------------------------------------------------------
>> >> Learn Graph Databases - Download FREE O'Reilly Book
>> >> "Graph Databases" is the definitive new guide to graph databases and
>> >> their applications. This 200-page book is written by three acclaimed
>> >> leaders in the field. The early access version is available now.
>> >> Download your free book today! http://p.sf.net/sfu/neotech_d2d_may
>> >> _______________________________________________
>> >> Csound-devel mailing list
>> >> Csound-devel@lists.sourceforge.net
>> >> https://lists.sourceforge.net/lists/listinfo/csound-devel
>> >
>> >
>> >
>> >
>> > ------------------------------------------------------------------------------
>> > Learn Graph Databases - Download FREE O'Reilly Book
>> > "Graph Databases" is the definitive new guide to graph databases and
>> > their applications. This 200-page book is written by three acclaimed
>> > leaders in the field. The early access version is available now.
>> > Download your free book today! http://p.sf.net/sfu/neotech_d2d_may
>> > _______________________________________________
>> > Csound-devel mailing list
>> > Csound-devel@lists.sourceforge.net
>> > https://lists.sourceforge.net/lists/listinfo/csound-devel
>> >
>>
>>
>> ------------------------------------------------------------------------------
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>> "Graph Databases" is the definitive new guide to graph databases and
>> their applications. This 200-page book is written by three acclaimed
>> leaders in the field. The early access version is available now.
>> Download your free book today! http://p.sf.net/sfu/neotech_d2d_may
>> _______________________________________________
>> Csound-devel mailing list
>> Csound-devel@lists.sourceforge.net
>> https://lists.sourceforge.net/lists/listinfo/csound-devel
>
>
>
> ------------------------------------------------------------------------------
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I on the other hand would be all over a
csoundSetChannelHintsChangedCallback() function. But it would have to
be coupled with a way of changing the hints at k-rate. Can this
already be done? But yes, it would be handy on the host side.



On 13 May 2013 08:12, Henrik Andersson  wrote:
> Hi Andrés,
>
> In my case of csound interfacing i have no what so ever need for a event
> driven channel callback,
> and i actually cant see a use case for it. Remeber i have just used Csound
> for 4 days so im
> pretty new to its capabilities.
> imho, just keep the api clean and simple, extend if there is a big need for
> it and in this case
> i cant even see the use for csoundSetChannelChangedCallback()
>
> One thing i have stumbled upon is:
>
> You can set rtaudio module to "null" with api csoundSetRTAudioModule(), but
> there is not
> paralell function for rtmidi which makes the api some kind of broken, i need
> to pass "-+rtmidi=null"
> as argument but not "-+rtaudio=null".
>
>
> Maybe someone else have a better input to this.
>
>
>
>
>
> 2013/5/13 Andres Cabrera 
>>
>> Hi Henrik,
>>
>> We're trying to keep the API as lean as possible (it's big enough!), so
>> there would have to be a compelling use case to add a new function. I think
>> that the way I imagine this being used (and encouraged) is that the channels
>> are either set in the csd header using chn_k and friends, and then queried
>> by the host (using csoundListChannels) just after compile before running
>> starts. Then the host should keep this list.
>>
>> The other usage I imagine, is the channels being created by the host
>> (automatically using csoundGetChannelValue) and then used by instruments.
>> The host then keeps track of the channels it has created.
>>
>> I have been thinking of adding a csoundSetChannelChangedCallback to let
>> the host know when a channel's properties (not its value) have been changed
>> within the Csound engine, or when a new channel has been created.
>>
>> What do you think?
>>
>> Cheers,
>> Andrés
>>
>>
>>
>> On Fri, May 10, 2013 at 8:51 AM, Henrik Andersson 
>> wrote:
>>>
>>> Thats true if name is known to host and by now, and by now, as far
>>> as i have seen, the only way to get the name of a channel is to get
>>> the channel list.
>>>
>>> The issue here is that name is used as key, and the key is unknown
>>> until you enumerate the available names. Another approach to this is
>>> having and API like csoundGetChannelName(p, idx) like:
>>>
>>> char *name = NULL;
>>> int idx = 0;
>>> int type;
>>>
>>> while ((name=csoundGetChannelName(p, idx))!=NULL)
>>> {
>>>   type = csoundGetChannelType(name);
>>>   if (type & CSOUND_CONTROL_CHANNEL)
>>>   {
>>>     ...
>>>   }
>>>   idx++;
>>> }
>>>
>>> With that kind of API your suggestion make sense, but it should not live
>>> side by side with the csoundListChannels() imho...
>>>
>>>
>>> /Henrik
>>>
>>>
>>>
>>> 2013/5/10 Rory Walsh 
>>>>
>>>> But wouldn't a simple wrapper function be useful, whereby we would
>>>> only need to pass it the string, and the API would do the rest. Would
>>>> save us all from writing a whole lot of the same code over and over
>>>> again?
>>>>
>>>> On 10 May 2013 16:07, Henrik Andersson  wrote:
>>>> > Hi Rory,
>>>> >
>>>> > Im new to csound since 2 days and have struggled with the api for both
>>>> > cs5
>>>> > and cs6 just on your topic. Im currently implementing a music composer
>>>> > that
>>>> > will host csound instruments. I think having API for specific channel
>>>> > to get
>>>> > type is a not so usable at all, the best approach i have found (cs6)
>>>> > is
>>>> > still getting the list of channels and do processing while looping
>>>> > over the
>>>> > list. With that in mind i would like to see test defines like:
>>>> >
>>>> > #define CSOUND_IS_CONTROL_CHANNEL(t) (t & CSOUND_CONTROL_CHANNEL)
>>>> >
>>>> > if (CSOUND_IS_CONTROL_CHANNEL(chan->type))
>>>> >
>>>> > What i ment is that the API is kind of limiting, somehow the host
>>>> > needs to
>>>> > enumerate the channel names and the only way to do that is by getting
>>>> > the
>>>> > list and while your at it, do what you need on the list.
>>>> >
>>>> > Regards,
>>>> >
>>>> > Henrik Andersson
>>>> >
>>>> >
>>>> >
>>>> >
>>>> >
>>>> >
>>>> > 2013/5/10 Rory Walsh 
>>>> >>
>>>> >> What's the handiest way of finding out the type of a channel?
>>>> >> Something
>>>> >> like:
>>>> >>
>>>> >> int csoundGetChannelType(const char *name);
>>>> >>
>>>> >> would be nice? This would return CSOUND_CONTROL_CHANNEL,
>>>> >> CSOUND_AUDIO_CHANNEL or CSOUND_STRING_CHANNEL. I'm sure there are
>>>> >> ways
>>>> >> of doing this already, but a little wrapper function would b nice all
>>>> >> the same.
>>>> >>
>>>> >>
>>>> >>
>>>> >> ------------------------------------------------------------------------------
>>>> >> Learn Graph Databases - Download FREE O'Reilly Book
>>>> >> "Graph Databases" is the definitive new guide to graph databases and
>>>> >> their applications. This 200-page book is written by three acclaimed
>>>> >> leaders in the field. The early access version is available now.
>>>> >> Download your free book today! http://p.sf.net/sfu/neotech_d2d_may
>>>> >> _______________________________________________
>>>> >> Csound-devel mailing list
>>>> >> Csound-devel@lists.sourceforge.net
>>>> >> https://lists.sourceforge.net/lists/listinfo/csound-devel
>>>> >
>>>> >
>>>> >
>>>> >
>>>> > ------------------------------------------------------------------------------
>>>> > Learn Graph Databases - Download FREE O'Reilly Book
>>>> > "Graph Databases" is the definitive new guide to graph databases and
>>>> > their applications. This 200-page book is written by three acclaimed
>>>> > leaders in the field. The early access version is available now.
>>>> > Download your free book today! http://p.sf.net/sfu/neotech_d2d_may
>>>> > _______________________________________________
>>>> > Csound-devel mailing list
>>>> > Csound-devel@lists.sourceforge.net
>>>> > https://lists.sourceforge.net/lists/listinfo/csound-devel
>>>> >
>>>>
>>>>
>>>> ------------------------------------------------------------------------------
>>>> Learn Graph Databases - Download FREE O'Reilly Book
>>>> "Graph Databases" is the definitive new guide to graph databases and
>>>> their applications. This 200-page book is written by three acclaimed
>>>> leaders in the field. The early access version is available now.
>>>> Download your free book today! http://p.sf.net/sfu/neotech_d2d_may
>>>> _______________________________________________
>>>> Csound-devel mailing list
>>>> Csound-devel@lists.sourceforge.net
>>>> https://lists.sourceforge.net/lists/listinfo/csound-devel
>>>
>>>
>>>
>>>
>>> ------------------------------------------------------------------------------
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>>> "Graph Databases" is the definitive new guide to graph databases and
>>> their applications. This 200-page book is written by three acclaimed
>>> leaders in the field. The early access version is available now.
>>> Download your free book today! http://p.sf.net/sfu/neotech_d2d_may
>>> _______________________________________________
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>>> Csound-devel@lists.sourceforge.net
>>> https://lists.sourceforge.net/lists/listinfo/csound-devel
>>>
>>
>>
>>
>> ------------------------------------------------------------------------------
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>> leaders in the field. The early access version is available now.
>> Download your free book today! http://p.sf.net/sfu/neotech_d2d_may
>> _______________________________________________
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>> https://lists.sourceforge.net/lists/listinfo/csound-devel
>>
>
>
> ------------------------------------------------------------------------------
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