media-add-ons/tone_producer_demo/ToneProducer.cpp

299 	// Are we being passed the buffer group we're already using?
302 	// Ahh, someone wants us to use a different buffer group.  At this point we delete
303 	// the one we are using and use the specified one instead.  If the specified group is
306 	// *before* deleting the buffer group, otherwise we'll deadlock waiting for that
311 		// we were given a valid group; just use that one from now on
316 		// we were passed a NULL group pointer; that means we construct
317 		// our own buffer group to use from now on
483 	// Set up the buffer group for our connection, as long as nobody handed us a
484 	// buffer group (via SetBufferGroup()) prior to this.  That can happen, for example,
827 	FPRINTF(stderr, "\tcreating group of %" B_PRId32 " buffers, size = %"
835 	// get a buffer from our buffer group
996 	BParameterGroup* group = mainGroup->MakeGroup("Frequency");
997 	BParameter* nullParam = group->MakeNullParameter(FREQUENCY_NULL_PARAM, B_MEDIA_NO_TYPE, "Frequency", B_GENERIC);
998 	BContinuousParameter* param = group->MakeContinuousParameter(FREQUENCY_PARAM, B_MEDIA_NO_TYPE, "", B_GAIN, "Hz", 0, 2500, 0.1);
1002 	group = mainGroup->MakeGroup("Amplitude");
1003 	nullParam = group->MakeNullParameter(GAIN_NULL_PARAM, B_MEDIA_NO_TYPE, "Amplitude", B_GENERIC);
1004 	param = group->MakeContinuousParameter(GAIN_PARAM, B_MEDIA_NO_TYPE, "", B_GAIN, "", 0, 1, 0.01);
1008 	group = mainGroup->MakeGroup("Waveform");
1009 	nullParam = group->MakeNullParameter(WAVEFORM_NULL_PARAM, B_MEDIA_NO_TYPE, "Waveform", B_GENERIC);
1010 	BDiscreteParameter* waveParam = group->MakeDiscreteParameter(WAVEFORM_PARAM, B_MEDIA_NO_TYPE, "", B_GENERIC);