ASIO:How to retrieve the sampling rate of a device

[YAN HONG]

Hi all,

I wrote a test code to obtain the sampling rate of devices driven by ASIO and check if the sampling rate is consistent with the audio sampling rate.

Code Select Expand

void Error(const char* es)
{
    char mes[200];
    sprintf_s(mes, "%s(error code: %d---%d)", es, BASS_ErrorGetCode(), BASS_ASIO_ErrorGetCode());
    printf("%s\n",mes);
}


Code Select Expand

if (!BASS_Init(-1, 44100, 0, 0, NULL))
{
    Error("BASS_Init");
}
DWORD asio_device = BASS_ASIO_GetDevice();
if (asio_device != BASS_NODEVICE)
{
        BASS_ASIO_Init(asio_device, 0);
}
else
{
       
        Error("Can't BASS_ASIO_Init");
}
printf("BASS_ASIO_GetRate == %d\n", BASS_ASIO_GetRate());
HSTREAM stream = BASS_StreamCreateFile(FALSE, "test.wav", 0, 0, BASS_SAMPLE_FLOAT | BASS_STREAM_DECODE | BASS_ASYNCFILE);
if (!stream)
 {
        Error("Can't play Stream");
}
BASS_CHANNELINFO info;
BASS_ChannelGetInfo(stream, &info);
printf("BASS Channel rate = %d \n", info.freq);
if (!BASS_ASIO_ChannelSetRate(FALSE, 0, info.freq))
{
        Error("BASS_ASIO_ChannelSetRate");
}     
if (!BASS_ASIO_CheckRate(info.freq))
{
        Error("BASS_ASIO_CheckRate");
}   
printf("BASS_ASIO_GetRate again == %d\n", BASS_ASIO_GetRate());

This is my test execution result.

Code Select Expand

BASS_ASIO_GetRate == 0
BASS Channel rate = 44100
BASS_ASIO_GetRate again == 0

Why did I print BASS_ASIO_GetRate twice, but the result is 0?

[Ian @ un4seen]

BASS_ASIO_GetRate returns a "double" floating-point value, while your printf call is expecting an integer. Please try changing "%d" to "%g".

[YAN HONG]

Yes，it works.I didn't notice the returned data type.Thanks

[YAN HONG]

Hi Ian,I was wondering if there is a function I can call to clear the ASIO buffer?

[Ian @ un4seen]

Please clarify what buffer(s) you want to clear and when.