Re: [Csnd-dev] CsoundAndroid getChannel problem

Hi Tarmo,

not sure how to do it in Android, but in CsoundUnity (written in C#) we do
something like this to force Android and iOS devices to interpret MYFLT as
a float:

https://github.com/rorywalsh/CsoundUnity/blob/470893372c06da09f7b5de5d1b3f3ed50e277f22/Runtime/CsoundUnity.cs#L38-L42

#if UNITY_EDITOR || UNITY_STANDALONE
using MYFLT = System.Double;
#elif UNITY_ANDROID || UNITY_IOS
using MYFLT = System.Single;
#endif

Hope this helps!


Il giorno ven 22 set 2023 alle ore 11:35 Tarmo Johannes <[email protected]>
ha scritto:

> Hi,
>
> I came back to this project and had strange findings:
>
> With CsoundAndroid 6.18  it does not matter - if I both set or do not set
> USE_DOUBLE -  MYFLT is always set to double and the results of all get
> functions, like   Csound->GetSr(), Csound->GetChannel()  are wrong (giving
> extremely small values).
>
> With CsoundAndroid 6.12, when i do not set USE_DOUBLE then MYFLT stands
> for float and the return values are correct.
>
> This problem happens only with the android, build on Desktop it is always
> right. I am testing it on a Samsung S9+ device, arm64 architecture, I use
> the arm64-v64 libraries to link the app against to:
>
>   LIBS +=
>  -L/home/tarmo/src/csound-android-6.12.0/CsoundForAndroid/CsoundAndroid/src/main/jniLibs/arm64-v8a/
> -lcsoundandroid -lsndfile -lc++_shared
> (or the ones for csound-android-6.18.0 for the other build).
>
> Does it make any sense?
>
> How can I force MYFLT to be float? With Csound 6.18 just non defining
> USE_DOUBLE is not enough.
>
>
> Thanks!
> tarmo
>
>
> Kontakt Steven Yi (<[email protected]>) kirjutas kuupäeval R, 8.
> september 2023 kell 01:34:
>
>> Only thing I can think of from the top of my head is checking if
>> USE_DOUBLE is set correctly.
>>
>> On Thu, Sep 7, 2023 at 4:58 PM Tarmo Johannes <[email protected]> wrote:
>>
>>> Hi!
>>>
>>> It is probably hard to guess but does anyone have a clue?
>>>
>>> I am working on a Qt based Csound project that I want to make work on
>>> both desktop and Android. I use the Csound API via C++ (thus no Java),
>>> including AndroidCsound.hpp and linking against the -lcsoundandroid
>>> -lsndfile -lc++_shared libraries.  CsoundAndroid is  from official
>>> Csound downloads:
>>>
>>> https://github.com/csound/csound/releases/download/6.18.0/csound-android-6.18.0.zip
>>>
>>> Everything works fine but I discovered Csound->GetChannel is
>>> malfunctioning  - it return always a very small number as if reading from
>>> some wrong place in the memory. No error messages.
>>> On desktop it works as expected.
>>>
>>> I remembered to have GetChannel functioning correctly in the past, I
>>> built the app with csound-android-6.12.0 (that used to work) and everything
>>> was correct.
>>>
>>> I tried to make a build with 6.16 and 6.17 to figure out when the change
>>> can have happened but these builds caused some runtime errors (dlopen
>>> failed: cannot locate symbol "__emutls_get_address") and I gave up.
>>>
>>> If it of any help, the project is up on:
>>> https://github.com/tarmoj/harmonicsPractice/
>>>
>>> In this case it is fine for me to stick with 6.12 but would be better to
>>> figure out, where is the reason.
>>>
>>> Do you have any idea?
>>>
>>> Thanks!
>>> tarmo
>>>
>>