[Openal] Serious problem with switching AL contexts

[rejcl77A-gmail]

Hi, guys,

I have a serious problem with switching AL contexts. I cannot switch between
two X-Fi sound cards. May I anyhow change the AL context of the first device
(hardware device 1) to the AL context of the other device (hardware device
2) without errors? When I made it I gave an exception (so I couldn't create
buffer neither source). Can U help me? It is very importatnt to me. Thank U
in advance. 

 

Paul, 

The Sound Developer. 


I enclosed some demo code to clarify my problem:

----------------------------------------------------------------------------
---------

.

..

...

....

 

pDefaultDevice = alcOpenDevice("[SB X-Fi Audio [1000]"); // X-fi device 1
ok

pContext = alcCreateContext(pDefaultDevice, NULL);
ok

                  

pInterComDevice = alcOpenDevice("[SB X-Fi Audio [1020]"); // X-fi device 2
ok

pInterComContext = alcCreateContext(pInterComDevice, NULL);
ok

      

bool bb1 = alcMakeContextCurrent(pContext);
ok -> bb1 == true

                  

if(alcGetError(pDefaultDevice) != ALC_NO_ERROR)
ok

      return ALC_FALSE;            

      

alGenBuffers(1, &Buffer);
ok

 

if(alGetError() != AL_NO_ERROR)
ok

      return AL_FALSE;

 

alutLoadWAVFile("wavdata\\FancyPants.wav", &format, &data, &size, &freq,
&loop);  

alBufferData(Buffer, format, data, size, freq);

alutUnloadWAV(format, data, size, freq);
ok

 

if(alGetError() != AL_NO_ERROR)
ok

      return AL_FALSE;

 

alGenSources(1, &Source);
ok

 

if(alGetError() != AL_NO_ERROR)
ok

      return AL_FALSE;

 

alSourcei (Source, AL_BUFFER,   Buffer   );

alSourcef (Source, AL_PITCH,    1.0      );

alSourcef (Source, AL_GAIN,     1.0      );

alSourcefv(Source, AL_POSITION, SourcePos);

alSourcefv(Source, AL_VELOCITY, SourceVel);

alSourcei (Source, AL_LOOPING,  true     );
ok

      

if(alGetError() != AL_NO_ERROR)
ok

      return AL_FALSE;

      

bool bb2 = alcMakeContextCurrent(pInterComContext);
ok

 

alGenBuffers(1, &Buffer2);
!!! bb2 told me no error but there is an Exception !!!

 

if(alGetError() != AL_NO_ERROR)

      return AL_FALSE;

 

alutLoadWAVFile("wavdata\\FancyPants2.wav", &format2, &data2, &size2,
&freq2, &loop2);

alBufferData(Buffer2, format2, data2, size2, freq2);

alutUnloadWAV(format2, data2, size2, freq2);

 

if(alGetError() != AL_NO_ERROR)

      return AL_FALSE;        

 

alGenSources(1, &Source2);
!!! Exception raising as well !!!

 

if(alGetError() != AL_NO_ERROR)

      return AL_FALSE;

 

alSourcei (Source2, AL_BUFFER,   Buffer2   );

alSourcef (Source2, AL_PITCH,    1.0      );

alSourcef (Source2, AL_GAIN,     1.0      );

alSourcefv(Source2, AL_POSITION, SourcePos);

alSourcefv(Source2, AL_VELOCITY, SourceVel);

alSourcei (Source2, AL_LOOPING,  false     );

 

if(alGetError() != AL_NO_ERROR)

      return AL_FALSE;

....

...

..

.

----------------------------------------------------------------------------
---------

 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://opensource.creative.com/pipermail/openal/attachments/20070607/2447f076/attachment-0001.html