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factored asio sample rate setting code into separate functions. added PaAsio_SetStreamSampleRate() function.

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This commit is contained in:
rossb 2009-01-05 09:08:44 +00:00
commit b4b747fc10
1 changed files with 143 additions and 70 deletions
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213
src/hostapi/asio/pa_asio.cpp
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@ -1755,6 +1755,98 @@ static PaError ValidateAsioSpecificStreamInfo(
}
static bool IsUsingExternalClockSource()
{
bool result = false;
ASIOError asioError;
ASIOClockSource clocks[32];
long numSources=32;
/* davidv: listing ASIO Clock sources. there is an ongoing investigation by
me about whether or not to call ASIOSetSampleRate if an external Clock is
used. A few drivers expected different things here */
asioError = ASIOGetClockSources(clocks, &numSources);
if( asioError != ASE_OK ){
PA_DEBUG(("ERROR: ASIOGetClockSources: %s\n", PaAsio_GetAsioErrorText(asioError) ));
}else{
PA_DEBUG(("INFO ASIOGetClockSources listing %d clocks\n", numSources ));
for (int i=0;i<numSources;++i){
PA_DEBUG(("ASIOClockSource%d %s current:%d\n", i, clocks[i].name, clocks[i].isCurrentSource ));
if (clocks[i].isCurrentSource)
result = true;
}
}
return result;
}
static PaError ValidateAndSetSampleRate( double sampleRate )
{
PaError result = paNoError;
ASIOError asioError;
// check that the device supports the requested sample rate
asioError = ASIOCanSampleRate( sampleRate );
PA_DEBUG(("ASIOCanSampleRate(%f):%d\n", sampleRate, asioError ));
if( asioError != ASE_OK )
{
result = paInvalidSampleRate;
PA_DEBUG(("ERROR: ASIOCanSampleRate: %s\n", PaAsio_GetAsioErrorText(asioError) ));
goto error;
}
// retrieve the current sample rate, we only change to the requested
// sample rate if the device is not already in that rate.
ASIOSampleRate oldRate;
asioError = ASIOGetSampleRate(&oldRate);
if( asioError != ASE_OK )
{
result = paInvalidSampleRate;
PA_DEBUG(("ERROR: ASIOGetSampleRate: %s\n", PaAsio_GetAsioErrorText(asioError) ));
goto error;
}
PA_DEBUG(("ASIOGetSampleRate:%f\n",oldRate));
if (oldRate != sampleRate){
/* Set sample rate */
PA_DEBUG(("before ASIOSetSampleRate(%f)\n",sampleRate));
/*
If you have problems with some drivers when externally clocked,
try switching on the following line and commenting out the one after it.
See IsUsingExternalClockSource() for more info.
*/
//if( IsUsingExternalClockSource() ){
if( false ){
asioError = ASIOSetSampleRate( 0 );
}else{
asioError = ASIOSetSampleRate( sampleRate );
}
if( asioError != ASE_OK )
{
result = paInvalidSampleRate;
PA_DEBUG(("ERROR: ASIOSetSampleRate: %s\n", PaAsio_GetAsioErrorText(asioError) ));
goto error;
}
PA_DEBUG(("after ASIOSetSampleRate(%f)\n",sampleRate));
}
else
{
PA_DEBUG(("No Need to change SR\n"));
}
error:
return result;
}
/* see pa_hostapi.h for a list of validity guarantees made about OpenStream parameters */
static PaError OpenStream( struct PaUtilHostApiRepresentation *hostApi,
@ -1786,7 +1878,6 @@ static PaError OpenStream( struct PaUtilHostApiRepresentation *hostApi,
PaAsioDriverInfo *driverInfo;
int *inputChannelSelectors = 0;
int *outputChannelSelectors = 0;
bool isExternal = false;
/* Are we using blocking i/o interface? */
int usingBlockingIo = ( !streamCallback ) ? TRUE : FALSE;
@ -1917,76 +2008,9 @@ static PaError OpenStream( struct PaUtilHostApiRepresentation *hostApi,
}
}
/* davidv: listing ASIO Clock sources, there is an ongoing investigation by
me about whether or not call ASIOSetSampleRate if an external Clock is
used. A few drivers expected different things here */
{
ASIOClockSource clocks[32];
long numSources=32;
asioError = ASIOGetClockSources(clocks, &numSources);
if( asioError != ASE_OK ){
PA_DEBUG(("ERROR: ASIOGetClockSources: %s\n", PaAsio_GetAsioErrorText(asioError) ));
}else{
PA_DEBUG(("INFO ASIOGetClockSources listing %d clocks\n", numSources ));
for (int i=0;i<numSources;++i){
PA_DEBUG(("ASIOClockSource%d %s current:%d\n", i,clocks[i].name, clocks[i].isCurrentSource ));
/*
If you have problems with some drivers when externally clocked,
uncomment the next two lines
*/
//if (clocks[i].isCurrentSource)
// isExternal = true;
}
}
}
// check that the device supports the requested sample rate
asioError = ASIOCanSampleRate( sampleRate );
PA_DEBUG(("ASIOCanSampleRate(%f):%d\n",sampleRate, asioError ));
if( asioError != ASE_OK )
{
result = paInvalidSampleRate;
PA_DEBUG(("ERROR: ASIOCanSampleRate: %s\n", PaAsio_GetAsioErrorText(asioError) ));
result = ValidateAndSetSampleRate( sampleRate );
if( result != paNoError )
goto error;
}
// retrieve the current sample rate, we only change to the requested
// sample rate if the device is not already in that rate.
ASIOSampleRate oldRate;
asioError = ASIOGetSampleRate(&oldRate);
if( asioError != ASE_OK )
{
result = paInvalidSampleRate;
PA_DEBUG(("ERROR: ASIOGetSampleRate: %s\n", PaAsio_GetAsioErrorText(asioError) ));
goto error;
}
PA_DEBUG(("ASIOGetSampleRate:%f\n",oldRate));
if (oldRate != sampleRate){
PA_DEBUG(("before ASIOSetSampleRate(%f)\n",sampleRate));
asioError = ASIOSetSampleRate( isExternal?0:sampleRate );
/* Set sample rate */
if( asioError != ASE_OK )
{
result = paInvalidSampleRate;
PA_DEBUG(("ERROR: ASIOSetSampleRate: %s\n", PaAsio_GetAsioErrorText(asioError) ));
goto error;
}
PA_DEBUG(("after ASIOSetSampleRate(%f)\n",sampleRate));
}
else
{
PA_DEBUG(("No Need to change SR\n"));
}
/*
IMPLEMENT ME:
@ -3996,3 +4020,52 @@ error:
return result;
}
/* NOTE: the following functions are ASIO-stream specific, and are called directly
by client code. We need to check for many more error conditions here because
we don't have the benefit of pa_front.c's parameter checking.
*/
static PaError GetAsioStreamPointer( PaAsioStream **stream, PaStream *s )
{
PaError result;
PaUtilHostApiRepresentation *hostApi;
PaAsioHostApiRepresentation *asioHostApi;
result = PaUtil_ValidateStreamPointer( s );
if( result != paNoError )
return result;
result = PaUtil_GetHostApiRepresentation( &hostApi, paASIO );
if( result != paNoError )
return result;
asioHostApi = (PaAsioHostApiRepresentation*)hostApi;
if( PA_STREAM_REP( s )->streamInterface == &asioHostApi->callbackStreamInterface
|| PA_STREAM_REP( s )->streamInterface == &asioHostApi->blockingStreamInterface )
{
/* s is an ASIO stream */
*stream = (PaAsioStream *)s;
return paNoError;
}
else
{
return paIncompatibleStreamHostApi;
}
}
PaError PaAsio_SetStreamSampleRate( PaStream* s, double sampleRate )
{
PaAsioStream *stream;
PaError result = GetAsioStreamPointer( &stream, s );
if( result != paNoError )
return result;
if( stream != theAsioStream )
return paBadStreamPtr;
return ValidateAndSetSampleRate( sampleRate );
}