WASAPIDeviceBase (const ComSmartPtr <IMMDevice>& d, const bool exclusiveMode)
: device (d),
sampleRate (0),
defaultSampleRate (0),
numChannels (0),
actualNumChannels (0),
minBufferSize (0),
defaultBufferSize (0),
latencySamples (0),
useExclusiveMode (exclusiveMode),
sampleRateHasChanged (false)
{
clientEvent = CreateEvent (0, false, false, _T("JuceWASAPI"));
ComSmartPtr <IAudioClient> tempClient (createClient());
if (tempClient == nullptr)
return;
REFERENCE_TIME defaultPeriod, minPeriod;
if (! check (tempClient->GetDevicePeriod (&defaultPeriod, &minPeriod)))
return;
WAVEFORMATEX* mixFormat = nullptr;
if (! check (tempClient->GetMixFormat (&mixFormat)))
return;
WAVEFORMATEXTENSIBLE format;
copyWavFormat (format, mixFormat);
CoTaskMemFree (mixFormat);
actualNumChannels = numChannels = format.Format.nChannels;
defaultSampleRate = format.Format.nSamplesPerSec;
minBufferSize = refTimeToSamples (minPeriod, defaultSampleRate);
defaultBufferSize = refTimeToSamples (defaultPeriod, defaultSampleRate);
rates.addUsingDefaultSort (defaultSampleRate);
static const int ratesToTest[] = { 44100, 48000, 88200, 96000, 176400, 192000 };
for (int i = 0; i < numElementsInArray (ratesToTest); ++i)
{
if (ratesToTest[i] == defaultSampleRate)
continue;
format.Format.nSamplesPerSec = (DWORD) ratesToTest[i];
if (SUCCEEDED (tempClient->IsFormatSupported (useExclusiveMode ? AUDCLNT_SHAREMODE_EXCLUSIVE : AUDCLNT_SHAREMODE_SHARED,
(WAVEFORMATEX*) &format, 0)))
if (! rates.contains (ratesToTest[i]))
rates.addUsingDefaultSort (ratesToTest[i]);
}
}
WASAPIDeviceBase (const ComSmartPtr <IMMDevice>& device_)
: device (device_),
sampleRate (0),
numChannels (0),
actualNumChannels (0),
defaultSampleRate (0),
minBufferSize (0),
defaultBufferSize (0),
latencySamples (0)
{
clientEvent = CreateEvent (0, false, false, _T("JuceWASAPI"));
ComSmartPtr <IAudioClient> tempClient (createClient());
if (tempClient == 0)
return;
REFERENCE_TIME defaultPeriod, minPeriod;
if (! OK (tempClient->GetDevicePeriod (&defaultPeriod, &minPeriod)))
return;
WAVEFORMATEX* mixFormat = 0;
if (! OK (tempClient->GetMixFormat (&mixFormat)))
return;
WAVEFORMATEXTENSIBLE format;
wasapi_copyWavFormat (format, mixFormat);
CoTaskMemFree (mixFormat);
actualNumChannels = numChannels = format.Format.nChannels;
defaultSampleRate = format.Format.nSamplesPerSec;
minBufferSize = wasapi_refTimeToSamples (minPeriod, defaultSampleRate);
defaultBufferSize = wasapi_refTimeToSamples (defaultPeriod, defaultSampleRate);
FloatElementComparator<double> comparator;
rates.addSorted (comparator, defaultSampleRate);
static const double ratesToTest[] = { 44100.0, 48000.0, 88200.0, 96000.0 };
for (int i = 0; i < numElementsInArray (ratesToTest); ++i)
{
if (ratesToTest[i] == defaultSampleRate)
continue;
format.Format.nSamplesPerSec = roundDoubleToInt (ratesToTest[i]);
if (SUCCEEDED (tempClient->IsFormatSupported (AUDCLNT_SHAREMODE_SHARED, (WAVEFORMATEX*) &format, 0)))
if (! rates.contains (ratesToTest[i]))
rates.addSorted (comparator, ratesToTest[i]);
}
}
bool tryInitialisingWithFormat (const bool useFloat, const int bytesPerSampleToTry)
{
WAVEFORMATEXTENSIBLE format;
zerostruct (format);
if (numChannels <= 2 && bytesPerSampleToTry <= 2)
{
format.Format.wFormatTag = WAVE_FORMAT_PCM;
}
else
{
format.Format.wFormatTag = WAVE_FORMAT_EXTENSIBLE;
format.Format.cbSize = sizeof (WAVEFORMATEXTENSIBLE) - sizeof (WAVEFORMATEX);
}
format.Format.nSamplesPerSec = roundDoubleToInt (sampleRate);
format.Format.nChannels = (WORD) numChannels;
format.Format.wBitsPerSample = (WORD) (8 * bytesPerSampleToTry);
format.Format.nAvgBytesPerSec = (DWORD) (format.Format.nSamplesPerSec * numChannels * bytesPerSampleToTry);
format.Format.nBlockAlign = (WORD) (numChannels * bytesPerSampleToTry);
format.SubFormat = useFloat ? KSDATAFORMAT_SUBTYPE_IEEE_FLOAT : KSDATAFORMAT_SUBTYPE_PCM;
format.Samples.wValidBitsPerSample = format.Format.wBitsPerSample;
switch (numChannels)
{
case 1: format.dwChannelMask = SPEAKER_FRONT_CENTER; break;
case 2: format.dwChannelMask = SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT; break;
case 4: format.dwChannelMask = SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT | SPEAKER_BACK_LEFT | SPEAKER_BACK_RIGHT; break;
case 6: format.dwChannelMask = SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT | SPEAKER_FRONT_CENTER | SPEAKER_LOW_FREQUENCY | SPEAKER_BACK_LEFT | SPEAKER_BACK_RIGHT; break;
case 8: format.dwChannelMask = SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT | SPEAKER_FRONT_CENTER | SPEAKER_LOW_FREQUENCY | SPEAKER_BACK_LEFT | SPEAKER_BACK_RIGHT | SPEAKER_FRONT_LEFT_OF_CENTER | SPEAKER_FRONT_RIGHT_OF_CENTER; break;
default: break;
}
WAVEFORMATEXTENSIBLE* nearestFormat = 0;
HRESULT hr = client->IsFormatSupported (AUDCLNT_SHAREMODE_SHARED, (WAVEFORMATEX*) &format, (WAVEFORMATEX**) &nearestFormat);
logFailure (hr);
if (hr == S_FALSE && format.Format.nSamplesPerSec == nearestFormat->Format.nSamplesPerSec)
{
wasapi_copyWavFormat (format, (WAVEFORMATEX*) nearestFormat);
hr = S_OK;
}
CoTaskMemFree (nearestFormat);
GUID session;
if (hr == S_OK
&& OK (client->Initialize (AUDCLNT_SHAREMODE_SHARED, AUDCLNT_STREAMFLAGS_EVENTCALLBACK,
0, 0, (WAVEFORMATEX*) &format, &session)))
{
actualNumChannels = format.Format.nChannels;
const bool isFloat = format.Format.wFormatTag == WAVE_FORMAT_EXTENSIBLE && format.SubFormat == KSDATAFORMAT_SUBTYPE_IEEE_FLOAT;
bytesPerSample = format.Format.wBitsPerSample / 8;
dataFormat = isFloat ? AudioDataConverters::float32LE
: (bytesPerSample == 4 ? AudioDataConverters::int32LE
: ((bytesPerSample == 3 ? AudioDataConverters::int24LE
: AudioDataConverters::int16LE)));
return true;
}
return false;
}