hi all. i’ve scoured the documentation and cannot find a way to send a chunk of raw data to DirectSound from within a different output plugin.
for instance, in the ‘output_mp3’ example, i would like to send each sound chunk received by OutputMP3_UpdateCallback() to the speakers (and then still carry on to encode it).
is this possible? many thanks.
- hellobono asked 14 years ago
[quote="Janus":2wco5396]Maybe you could create a second System object with DirectSound set as its output, and pass the sound data onto that System.[/quote:2wco5396]
thanks for the idea. is there much overhead associated with creating a System?
so i tried to implement what you suggested and i’m running into an error (22) Unsupported file or Audio Format. can anybody see what the problem is? this is a snippet of the code i added to OutputMP3_UpdateCallback():
[create/init system ...] createsoundexinfo.cbsize = sizeof(FMOD_CREATESOUNDEXINFO); createsoundexinfo.length = mp3->dwSamples * sizeof(SHORT); createsoundexinfo.fileoffset = 0; createsoundexinfo.numchannels = 0; createsoundexinfo.defaultfrequency = 0; createsoundexinfo.format = FMOD_SOUND_FORMAT_PCM16; createsoundexinfo.initialsubsound = 0; createsoundexinfo.numsubsounds = 0; createsoundexinfo.inclusionlist = 0; createsoundexinfo.inclusionlistnum = 0; createsoundexinfo.pcmreadcallback = 0; createsoundexinfo.pcmsetposcallback = 0; createsoundexinfo.dlsname = 0; result = FMOD_System_CreateSound(system, mp3->pWAVBuffer, (FMOD_MODE)(FMOD_SOFTWARE | FMOD_OPENMEMORY | FMOD_OPENRAW ), &createsoundexinfo, &sound); ERRCHECK(result);[/code:2wco5396]
Creating a System object and Sound [b:jhht2xsc]in[/b:jhht2xsc] the callback can’t possibly be a good idea. I think you’d want to create both System objects at startup, along with both Sounds, and then copy wave data from one to the other in the callback.
[quote="brett":14hwdtfh]the reason it is failing is because you never specified numchannels or default frequency.[/quote:14hwdtfh]
how can i tell what the number of channels and frequency will be in an output plugin callback? for the raw data in the output_mp3 example, i tried defaultfrequency = 44100 with numchannels = 1 and numchannels = 2 (all other values as per my earlier post) and neither worked.
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