cannam@124: #ifndef INCLUDED_PORTAUDIO_EXCEPTION_HXX
cannam@124: #define INCLUDED_PORTAUDIO_EXCEPTION_HXX
cannam@124: 
cannam@124: // ---------------------------------------------------------------------------------------
cannam@124: 
cannam@124: #include <exception>
cannam@124: 
cannam@124: #include "portaudio.h"
cannam@124: 
cannam@124: // ---------------------------------------------------------------------------------------
cannam@124: 
cannam@124: namespace portaudio
cannam@124: {
cannam@124: 
cannam@124: 	//////
cannam@124: 	/// @brief Base class for all exceptions PortAudioCpp can throw.
cannam@124: 	///
cannam@124: 	/// Class is derived from std::exception.
cannam@124: 	//////
cannam@124: 	class Exception : public std::exception
cannam@124: 	{
cannam@124: 	public:
cannam@124: 		virtual ~Exception() throw() {}
cannam@124: 
cannam@124: 		virtual const char *what() const throw() = 0;
cannam@124: 	};
cannam@124: 	
cannam@124: 	// -----------------------------------------------------------------------------------
cannam@124: 
cannam@124: 	//////
cannam@124: 	/// @brief Wrapper for PortAudio error codes to C++ exceptions.
cannam@124: 	///
cannam@124: 	/// It wraps up PortAudio's error handling mechanism using 
cannam@124: 	/// C++ exceptions and is derived from std::exception for 
cannam@124: 	/// easy exception handling and to ease integration with 
cannam@124: 	/// other code.
cannam@124: 	///
cannam@124: 	/// To know what exceptions each function may throw, look up 
cannam@124: 	/// the errors that can occure in the PortAudio documentation 
cannam@124: 	/// for the equivalent functions.
cannam@124: 	///
cannam@124: 	/// Some functions are likely to throw an exception (such as 
cannam@124: 	/// Stream::open(), etc) and these should always be called in 
cannam@124: 	/// try{} catch{} blocks and the thrown exceptions should be 
cannam@124: 	/// handled properly (ie. the application shouldn't just abort, 
cannam@124: 	/// but merely display a warning dialog to the user or something).
cannam@124: 	/// However nearly all functions in PortAudioCpp are capable 
cannam@124: 	/// of throwing exceptions. When a function like Stream::isStopped() 
cannam@124: 	/// throws an exception, it's such an exceptional state that it's 
cannam@124: 	/// not likely that it can be recovered. PaExceptions such as these 
cannam@124: 	/// can ``safely'' be left to be handled by some outer catch-all-like 
cannam@124: 	/// mechanism for unrecoverable errors.
cannam@124: 	//////
cannam@124: 	class PaException : public Exception
cannam@124: 	{
cannam@124: 	public:
cannam@124: 		explicit PaException(PaError error);
cannam@124: 
cannam@124: 		const char *what() const throw();
cannam@124: 
cannam@124: 		PaError paError() const;
cannam@124: 		const char *paErrorText() const;
cannam@124: 
cannam@124: 		bool isHostApiError() const; // extended
cannam@124: 		long lastHostApiError() const;
cannam@124: 		const char *lastHostApiErrorText() const;
cannam@124: 
cannam@124: 		bool operator==(const PaException &rhs) const;
cannam@124: 		bool operator!=(const PaException &rhs) const;
cannam@124: 
cannam@124: 	private:
cannam@124: 		PaError error_;
cannam@124:  	};
cannam@124: 
cannam@124: 	// -----------------------------------------------------------------------------------
cannam@124: 
cannam@124: 	//////
cannam@124: 	/// @brief Exceptions specific to PortAudioCpp (ie. exceptions which do not have an 
cannam@124: 	/// equivalent PortAudio error code).
cannam@124: 	//////
cannam@124: 	class PaCppException : public Exception
cannam@124: 	{
cannam@124: 	public:
cannam@124: 		enum ExceptionSpecifier
cannam@124: 		{
cannam@124: 			UNABLE_TO_ADAPT_DEVICE
cannam@124: 		};
cannam@124: 
cannam@124: 		PaCppException(ExceptionSpecifier specifier);
cannam@124: 
cannam@124: 		const char *what() const throw();
cannam@124: 
cannam@124: 		ExceptionSpecifier specifier() const;
cannam@124: 
cannam@124: 		bool operator==(const PaCppException &rhs) const;
cannam@124: 		bool operator!=(const PaCppException &rhs) const;
cannam@124: 
cannam@124: 	private:
cannam@124: 		ExceptionSpecifier specifier_;
cannam@124: 	};
cannam@124: 
cannam@124: 
cannam@124: } // namespace portaudio
cannam@124: 
cannam@124: // ---------------------------------------------------------------------------------------
cannam@124: 
cannam@124: #endif // INCLUDED_PORTAUDIO_EXCEPTION_HXX
cannam@124: