C++ (Cpp) BParameter::Type示例

示例#1

文件： ESDSinkNode.cpp 项目： AmirAbrams/haiku

status_t
ESDSinkNode::GetConfigurationFor(BMessage * into_message)
{
	CALLED();
	
	BParameter *parameter = NULL;
	void *buffer;
	size_t size = 128;
	bigtime_t last_change;
	status_t err;
	
	if (!into_message)
		return B_BAD_VALUE;
	
	buffer = malloc(size);
	
	for(int32 i=0; i<fWeb->CountParameters(); i++) {
		parameter = fWeb->ParameterAt(i);
		if(parameter->Type() != BParameter::B_CONTINUOUS_PARAMETER
			&& parameter->Type() != BParameter::B_DISCRETE_PARAMETER)
			continue;
			
		PRINT(("getting parameter %li\n", parameter->ID()));
		size = 128;
		while((err = GetParameterValue(parameter->ID(), &last_change, buffer, &size))==B_NO_MEMORY) {
			size += 128;
			free(buffer);
			buffer = malloc(size);
		}
		
		if(err == B_OK && size > 0) {
			into_message->AddInt32("parameterID", parameter->ID());
			into_message->AddData("parameterData", B_RAW_TYPE, buffer, size, false);
		} else {
			PRINT(("parameter %li err : %s\n", parameter->ID(), strerror(err)));
		}
	}
	
	//PRINT_OBJECT(*into_message);
	
	return B_OK;
}

示例#2

文件： DefaultMediaTheme.cpp 项目： mmanley/Antares

static bool 
parameter_should_be_hidden(BParameter &parameter)
{
	// ToDo: note, this is probably completely stupid, but it's the only
	// way I could safely remove the null parameters that are not shown
	// by the R5 media theme
	if (parameter.Type() != BParameter::B_NULL_PARAMETER
		|| strcmp(parameter.Kind(), B_WEB_PHYSICAL_INPUT))
		return false;

	for (int32 i = 0; i < parameter.CountOutputs(); i++) {
		if (!strcmp(parameter.OutputAt(0)->Kind(), B_INPUT_MUX))
			return true;
	}

	return false;
}