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//
// 1997/09/27 21:38:01
//
#include "audiodrv.h"
audioDriver::audioDriver()
{
// Reset everything.
errorString = "None";
frequency = 0;
channels = 0;
encoding = 0;
precision = 0;
audio = (config = NULL);
}
bool audioDriver::IsThere()
{
// Check device availability and write permissions.
return (access(AUDIODEVICE,W_OK)==0);
}
bool audioDriver::Open(udword inFreq, int inPrecision, int inChannels,
int inFragments, int inFragBase)
{
// Transfer input parameters to this object.
// May later be replaced with driver defaults.
frequency = inFreq;
long chpars[] = {AL_OUTPUT_RATE, 0};
// Frequency
chpars[1] = frequency;
ALsetparams(AL_DEFAULT_DEVICE, chpars, 2);
ALgetparams(AL_DEFAULT_DEVICE, chpars, 2);
config = ALnewconfig();
// Set sample format
ALsetsampfmt(config, AL_SAMPFMT_TWOSCOMP);
encoding = SIDEMU_SIGNED_PCM; // unlike other systems
// Mono output
ALsetchannels(config, AL_MONO);
channels = SIDEMU_MONO;
// 8-bit sampleSize
ALsetwidth(config, AL_SAMPLE_8);
precision = SIDEMU_8BIT;
// Allocate an audio port
if((audio = ALopenport("SIDPLAY sound", "w", config)) == NULL)
{
errorString = "AUDIO: Could not open audio port.";
oserror();
ALfreeconfig(config);
return false; //(1);
}
// Allocate sound buffers
blockSize = frequency;
ALsetqueuesize(config,blockSize);
return true;
}
// Close an opened audio device, free any allocated buffers and
// reset any variables that reflect the current state.
void audioDriver::Close()
{
if (audio != NULL)
{
ALcloseport(audio);
ALfreeconfig(config);
audio = (config = NULL);
}
}
void audioDriver::Play(ubyte* pBuffer, int bufferSize)
{
if (audio != NULL)
{
ALwritesamps(audio,pBuffer,bufferSize);
}
}
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