[openrtm-users 00177] Re: Return type for two components. OmniORB.

[janarbek]

Hello, Thank you very much. 

Ando Noriaki <n-ando ＠ aist.go.jp> wrote:    Hello

> I have a WAVE Component that plays *.Wav file and another component caller
> component that uses WAVE component via service port.
>
> Interface is looks like below.
>
> Interface WavePlayer{
>
> void playWaveFile(string filename);
> }
>
>
> When I start my Caller Comp and WaveComp in 2 different terminals,
> playWaveFile plays in the the terminal where Wave Comp started.
>
> I want payWaveFile to be played in CallerComp's terminal.

You mean you want get .wav file in CallerComp's node?
    If I have a sting show(); function in ProviderComp, then I can get the Return value from ConsumerComp. 
   
  Now, I have a void playWaveFile(string filename); function in my ProviderComp which playes Wav file. But, since playWaveFile function returns no value, I can not see the playing sounc in my Consumer Components terminal.So, I think I need to retunr some value, but I don't knwo which value I need to retun? 
   
   
  I am trying to play Wav in Proivder Comp and get the sound in Consumer comp without sending the Wav file to consumer,........Is it possibel????
   
   
   
  

> In order to do so, I think I need to return a value for playWaveFile. But
> omniORB doesn't have such feature.
>
> Is there any other way, I can do it??????????????????????

If you want to send ".wav" file to player component from caller
component, you can give ".wav" file data as an argument like this.

typedef sequence FileData;
interface WavePlayer
{
void playWaveFile(in FileData data);
};


and call this operations in caller component like this,

FileData data;
data.length( set_length_of_the_wav_file );

for (int i(0); i < length_of_the_wav_file; ++i)
{
data[i] = // copy wav file data
// you can also use memcpy() to copy data, because
// CORBA sequence data area is continuously allocated.
}

wavplayer->playWaveFile(data);


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  ==================================================================================================================================================================
  Janarbek, Researcher. 
Software Robot Research Team, ETRI(Electronics and Telecommunications Research Institute)
161 Kajong-Dong, Yusong-Gu, TAEJON, 305-350, KOREA
Email : janarbek ＠ etri.re.kr
Phone : 82-42-860-1838
Fax : 82-42-860-6790
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