PaError PaHost_OpenStream( internalPortAudioStream *past )
{
PaError result = paNoError;
PaHostSoundControl *pahsc;
unsigned int minNumBuffers;
internalPortAudioDevice *pad;
DBUG(("PaHost_OpenStream() called.\n" ));
/* Allocate and initialize host data. */
pahsc = (PaHostSoundControl *) malloc(sizeof(PaHostSoundControl));
if( pahsc == NULL )
{
result = paInsufficientMemory;
goto error;
}
memset( pahsc, 0, sizeof(PaHostSoundControl) );
past->past_DeviceData = (void *) pahsc;
pahsc->pahsc_OutputHandle = BAD_DEVICE_ID; /* No device currently opened. */
pahsc->pahsc_InputHandle = BAD_DEVICE_ID;
pahsc->pahsc_IsAudioThreadValid = 0;
pahsc->pahsc_IsWatchDogThreadValid = 0;
/* Allocate native buffers. */
pahsc->pahsc_BytesPerInputBuffer = past->past_FramesPerUserBuffer *
past->past_NumInputChannels * sizeof(short);
if( past->past_NumInputChannels > 0)
{
pahsc->pahsc_NativeInputBuffer = (short *) malloc(pahsc->pahsc_BytesPerInputBuffer);
if( pahsc->pahsc_NativeInputBuffer == NULL )
{
result = paInsufficientMemory;
goto error;
}
}
pahsc->pahsc_BytesPerOutputBuffer = past->past_FramesPerUserBuffer *
past->past_NumOutputChannels * sizeof(short);
if( past->past_NumOutputChannels > 0)
{
pahsc->pahsc_NativeOutputBuffer = (short *) malloc(pahsc->pahsc_BytesPerOutputBuffer);
if( pahsc->pahsc_NativeOutputBuffer == NULL )
{
result = paInsufficientMemory;
goto error;
}
}
/* DBUG(("PaHost_OpenStream: pahsc_MinFramesPerHostBuffer = %d\n", pahsc->pahsc_MinFramesPerHostBuffer )); */
minNumBuffers = Pa_GetMinNumBuffers( past->past_FramesPerUserBuffer, past->past_SampleRate );
past->past_NumUserBuffers = ( minNumBuffers > past->past_NumUserBuffers ) ? minNumBuffers : past->past_NumUserBuffers;
pahsc->pahsc_InverseMicrosPerBuffer = past->past_SampleRate / (1000000.0 * past->past_FramesPerUserBuffer);
DBUG(("past_SampleRate = %g\n", past->past_SampleRate ));
DBUG(("past_FramesPerUserBuffer = %d\n", past->past_FramesPerUserBuffer ));
DBUG(("pahsc_InverseMicrosPerBuffer = %g\n", pahsc->pahsc_InverseMicrosPerBuffer ));
/* ------------------------- OPEN DEVICE -----------------------*/
/* just output */
if (past->past_OutputDeviceID == past->past_InputDeviceID)
{
if ((past->past_NumOutputChannels > 0) && (past->past_NumInputChannels > 0) )
{
pad = Pa_GetInternalDevice( past->past_OutputDeviceID );
DBUG(("PaHost_OpenStream: attempt to open %s for O_RDWR\n", pad->pad_DeviceName ));
/* dmazzoni: test it first in nonblocking mode to
make sure the device is not busy */
pahsc->pahsc_InputHandle = open(pad->pad_DeviceName,O_RDWR|O_NONBLOCK);
if(pahsc->pahsc_InputHandle==-1)
{
ERR_RPT(("PaHost_OpenStream: could not open %s for O_RDWR\n", pad->pad_DeviceName ));
result = paHostError;
goto error;
}
close(pahsc->pahsc_InputHandle);
pahsc->pahsc_OutputHandle = pahsc->pahsc_InputHandle =
open(pad->pad_DeviceName,O_RDWR);
if(pahsc->pahsc_InputHandle==-1)
{
ERR_RPT(("PaHost_OpenStream: could not open %s for O_RDWR\n", pad->pad_DeviceName ));
result = paHostError;
goto error;
}
Pa_SetLatency( pahsc->pahsc_OutputHandle,
past->past_NumUserBuffers, past->past_FramesPerUserBuffer,
past->past_NumOutputChannels );
result = Pa_SetupDeviceFormat( pahsc->pahsc_OutputHandle,
past->past_NumOutputChannels, (int)past->past_SampleRate );
}
}
else
{
if (past->past_NumOutputChannels > 0)
{
pad = Pa_GetInternalDevice( past->past_OutputDeviceID );
DBUG(("PaHost_OpenStream: attempt to open %s for O_WRONLY\n", pad->pad_DeviceName ));
/* dmazzoni: test it first in nonblocking mode to
make sure the device is not busy */
pahsc->pahsc_OutputHandle = open(pad->pad_DeviceName,O_WRONLY|O_NONBLOCK);
if(pahsc->pahsc_OutputHandle==-1)
{
ERR_RPT(("PaHost_OpenStream: could not open %s for O_WRONLY\n", pad->pad_DeviceName ));
result = paHostError;
goto error;
}
close(pahsc->pahsc_OutputHandle);
pahsc->pahsc_OutputHandle = open(pad->pad_DeviceName,O_WRONLY);
if(pahsc->pahsc_OutputHandle==-1)
{
ERR_RPT(("PaHost_OpenStream: could not open %s for O_WRONLY\n", pad->pad_DeviceName ));
result = paHostError;
goto error;
}
Pa_SetLatency( pahsc->pahsc_OutputHandle,
past->past_NumUserBuffers, past->past_FramesPerUserBuffer,
past->past_NumOutputChannels );
result = Pa_SetupOutputDeviceFormat( pahsc->pahsc_OutputHandle,
past->past_NumOutputChannels, (int)past->past_SampleRate );
}
if (past->past_NumInputChannels > 0)
{
pad = Pa_GetInternalDevice( past->past_InputDeviceID );
DBUG(("PaHost_OpenStream: attempt to open %s for O_RDONLY\n", pad->pad_DeviceName ));
/* dmazzoni: test it first in nonblocking mode to
make sure the device is not busy */
pahsc->pahsc_InputHandle = open(pad->pad_DeviceName,O_RDONLY|O_NONBLOCK);
if(pahsc->pahsc_InputHandle==-1)
{
ERR_RPT(("PaHost_OpenStream: could not open %s for O_RDONLY\n", pad->pad_DeviceName ));
result = paHostError;
goto error;
}
close(pahsc->pahsc_InputHandle);
pahsc->pahsc_InputHandle = open(pad->pad_DeviceName,O_RDONLY);
if(pahsc->pahsc_InputHandle==-1)
{
ERR_RPT(("PaHost_OpenStream: could not open %s for O_RDONLY\n", pad->pad_DeviceName ));
result = paHostError;
goto error;
}
Pa_SetLatency( pahsc->pahsc_InputHandle, /* DH20010115 - was OutputHandle! */
past->past_NumUserBuffers, past->past_FramesPerUserBuffer,
past->past_NumInputChannels );
result = Pa_SetupInputDeviceFormat( pahsc->pahsc_InputHandle,
past->past_NumInputChannels, (int)past->past_SampleRate );
}
}
DBUG(("PaHost_OpenStream: SUCCESS - result = %d\n", result ));
return result;
error:
ERR_RPT(("PaHost_OpenStream: ERROR - result = %d\n", result ));
PaHost_CloseStream( past );
return result;
}
PaError PaHost_OpenStream( internalPortAudioStream *past )
{
HRESULT hr;
PaError result = paNoError;
PaHostSoundControl *pahsc;
int numBytes, maxChannels;
unsigned int minNumBuffers;
internalPortAudioDevice *pad;
DSoundWrapper *dsw;
/* Allocate and initialize host data. */
pahsc = (PaHostSoundControl *) PaHost_AllocateFastMemory(sizeof(PaHostSoundControl)); /* MEM */
if( pahsc == NULL )
{
result = paInsufficientMemory;
goto error;
}
memset( pahsc, 0, sizeof(PaHostSoundControl) );
past->past_DeviceData = (void *) pahsc;
pahsc->pahsc_TimerID = 0;
dsw = &pahsc->pahsc_DSoundWrapper;
DSW_Init( dsw );
/* Allocate native buffer. */
maxChannels = ( past->past_NumOutputChannels > past->past_NumInputChannels ) ?
past->past_NumOutputChannels : past->past_NumInputChannels;
pahsc->pahsc_BytesPerBuffer = past->past_FramesPerUserBuffer * maxChannels * sizeof(short);
if( maxChannels > 0 )
{
pahsc->pahsc_NativeBuffer = (short *) PaHost_AllocateFastMemory(pahsc->pahsc_BytesPerBuffer); /* MEM */
if( pahsc->pahsc_NativeBuffer == NULL )
{
result = paInsufficientMemory;
goto error;
}
}
else
{
result = paInvalidChannelCount;
goto error;
}
DBUG(("PaHost_OpenStream: pahsc_MinFramesPerHostBuffer = %d\n", pahsc->pahsc_MinFramesPerHostBuffer ));
minNumBuffers = Pa_GetMinNumBuffers( past->past_FramesPerUserBuffer, past->past_SampleRate );
past->past_NumUserBuffers = ( minNumBuffers > past->past_NumUserBuffers ) ? minNumBuffers : past->past_NumUserBuffers;
numBytes = pahsc->pahsc_BytesPerBuffer * past->past_NumUserBuffers;
if( numBytes < DSBSIZE_MIN )
{
result = paBufferTooSmall;
goto error;
}
if( numBytes > DSBSIZE_MAX )
{
result = paBufferTooBig;
goto error;
}
pahsc->pahsc_FramesPerDSBuffer = past->past_FramesPerUserBuffer * past->past_NumUserBuffers;
{
int msecLatency = (int) ((pahsc->pahsc_FramesPerDSBuffer * 1000) / past->past_SampleRate);
PRINT(("PortAudio on DirectSound - Latency = %d frames, %d msec\n", pahsc->pahsc_FramesPerDSBuffer, msecLatency ));
}
/* ------------------ OUTPUT */
if( (past->past_OutputDeviceID >= 0) && (past->past_NumOutputChannels > 0) )
{
DBUG(("PaHost_OpenStream: deviceID = 0x%x\n", past->past_OutputDeviceID));
pad = Pa_GetInternalDevice( past->past_OutputDeviceID );
hr = DirectSoundCreate( pad->pad_lpGUID, &dsw->dsw_pDirectSound, NULL );
/* If this fails, then try each output device until we find one that works. */
if( hr != DS_OK )
{
int i;
ERR_RPT(("Creation of requested Audio Output device '%s' failed.\n",
((pad->pad_lpGUID == NULL) ? "Default" : pad->pad_Info.name) ));
for( i=0; i<Pa_CountDevices(); i++ )
{
pad = Pa_GetInternalDevice( i );
if( pad->pad_Info.maxOutputChannels >= past->past_NumOutputChannels )
{
DBUG(("Try device '%s' instead.\n", pad->pad_Info.name ));
hr = DirectSoundCreate( pad->pad_lpGUID, &dsw->dsw_pDirectSound, NULL );
if( hr == DS_OK )
{
ERR_RPT(("Using device '%s' instead.\n", pad->pad_Info.name ));
break;
}
}
}
}
if( hr != DS_OK )
{
ERR_RPT(("PortAudio: DirectSoundCreate() failed!\n"));
result = paHostError;
sPaHostError = hr;
goto error;
}
hr = DSW_InitOutputBuffer( dsw,
(unsigned long) (past->past_SampleRate + 0.5),
past->past_NumOutputChannels, numBytes );
DBUG(("DSW_InitOutputBuffer() returns %x\n", hr));
if( hr != DS_OK )
{
result = paHostError;
sPaHostError = hr;
goto error;
}
past->past_FrameCount = pahsc->pahsc_DSoundWrapper.dsw_FramesWritten;
}
#if SUPPORT_AUDIO_CAPTURE
/* ------------------ INPUT */
if( (past->past_InputDeviceID >= 0) && (past->past_NumInputChannels > 0) )
{
pad = Pa_GetInternalDevice( past->past_InputDeviceID );
hr = DirectSoundCaptureCreate( pad->pad_lpGUID, &dsw->dsw_pDirectSoundCapture, NULL );
/* If this fails, then try each input device until we find one that works. */
if( hr != DS_OK )
{
int i;
ERR_RPT(("Creation of requested Audio Capture device '%s' failed.\n",
((pad->pad_lpGUID == NULL) ? "Default" : pad->pad_Info.name) ));
for( i=0; i<Pa_CountDevices(); i++ )
{
pad = Pa_GetInternalDevice( i );
if( pad->pad_Info.maxInputChannels >= past->past_NumInputChannels )
{
PRINT(("Try device '%s' instead.\n", pad->pad_Info.name ));
hr = DirectSoundCaptureCreate( pad->pad_lpGUID, &dsw->dsw_pDirectSoundCapture, NULL );
if( hr == DS_OK ) break;
}
}
}
if( hr != DS_OK )
{
ERR_RPT(("PortAudio: DirectSoundCaptureCreate() failed!\n"));
result = paHostError;
sPaHostError = hr;
goto error;
}
hr = DSW_InitInputBuffer( dsw,
(unsigned long) (past->past_SampleRate + 0.5),
past->past_NumInputChannels, numBytes );
DBUG(("DSW_InitInputBuffer() returns %x\n", hr));
if( hr != DS_OK )
{
ERR_RPT(("PortAudio: DSW_InitInputBuffer() returns %x\n", hr));
result = paHostError;
sPaHostError = hr;
goto error;
}
}
#endif /* SUPPORT_AUDIO_CAPTURE */
/* Calculate scalar used in CPULoad calculation. */
{
LARGE_INTEGER frequency;
if( QueryPerformanceFrequency( &frequency ) == 0 )
{
pahsc->pahsc_InverseTicksPerUserBuffer = 0.0;
}
else
{
pahsc->pahsc_InverseTicksPerUserBuffer = past->past_SampleRate /
( (double)frequency.QuadPart * past->past_FramesPerUserBuffer );
DBUG(("pahsc_InverseTicksPerUserBuffer = %g\n", pahsc->pahsc_InverseTicksPerUserBuffer ));
}
}
return result;
error:
PaHost_CloseStream( past );
return result;
}