Audio::__impl::OpenAL Namespace Reference

Classes
struct	RendererData

Functions
void	_checkAlErrorAt (ALenum error, const char *filename, int lineno) throw (Exception)
void	_clearAlError () throw ()
ALenum	asALFormat (const Format &format) throw (Exception)

Function Documentation

void Audio::__impl::OpenAL::_checkAlErrorAt	(	ALenum	error,
		const char *	filename,
		int	lineno
	)
throw	(	Exception
	)

Definition at line 20 of file OpenALHelpers.cpp.

References error, and fprintf.

            {
                switch(error) {
                case AL_NO_ERROR : return;
                default: 
                    {
                        const char* errdesc = (const char *)alGetString(error);
                        char s_lineno[32];
                        char s_errcode_buf[32];
                        const char *s_errcode;
                        sprintf(s_lineno, "%d", lineno);
                        
                        switch (error) {
                        case ALC_INVALID_DEVICE: s_errcode = "(Invalid device)";      break;
                        case ALC_INVALID_CONTEXT:s_errcode = "(Invalid context id)";  break;
                        case ALC_INVALID_ENUM:   s_errcode = "(Bad enum)";            break;
                        case ALC_INVALID_VALUE:  s_errcode = "(Bad value)";           break;
                        case ALC_OUT_OF_MEMORY:  s_errcode = "(Out of memory)";       break;
                        default:
                            sprintf(s_errcode_buf, "(0x%x)", error);
                            s_errcode = s_errcode_buf;
                        };
                        
                        std::string error("OpenAL error: ");
                        error += std::string(errdesc ? errdesc : "unknown") + s_errcode + " at " + filename + ":" + s_lineno;
                        fprintf(stderr, "%s\n", error.c_str());
                        throw Exception(error);
                    }
                }
            }

void Audio::__impl::OpenAL::_clearAlError	(	)
throw	(
	)

Definition at line 52 of file OpenALHelpers.cpp.

            {
                alGetError();
            }

ALenum Audio::__impl::OpenAL::asALFormat	(	const Format &	format)
throw	(	Exception
	)

Definition at line 58 of file OpenALHelpers.cpp.

Referenced by Audio::OpenALSimpleSound::loadImpl(), and Audio::OpenALStreamingSound::readAndFlip().

            {
                ALenum alformat;
                switch(format.bitsPerSample) {
                case 8:
                    switch(format.channels) {
                    case 1:  alformat = AL_FORMAT_MONO8; break;
                    case 2:  alformat = AL_FORMAT_STEREO8; break;
                    default: throw Exception("internal error - unexpected number of channels");
                    };
                    break;
                case 16:
                    switch(format.channels) {
                    case 1:  alformat = AL_FORMAT_MONO16; break;
                    case 2:  alformat = AL_FORMAT_STEREO16; break;
                    default: throw Exception("internal error - unexpected number of channels");
                    };
                    break;
                default:
                    throw Exception("internal error - unexpected bit depth");
                };
                
                return alformat;
            }