private int SetSampleDataToWasapiStart(int idx, WWFlacRWCS.FlacRW flac)
{
int hr = 0;
mDecodedPcmOffs = 0;
WWFlacRWCS.Metadata meta;
flac.GetDecodedMetadata(out meta);
mFromFormat = new DeviceFormat();
mFromFormat.Set(meta.channels, meta.sampleRate,
WasapiCS.BitAndFormatToSampleFormatType(
meta.bitsPerSample, meta.bitsPerSample, WasapiCS.BitFormatType.SInt),
WasapiCS.GetTypicalChannelMask(meta.channels));
if (WasapiCS.ShareMode.Exclusive == mShareMode)
{
// 排他モードの時。サンプルレート変換しないので
// サンプル数がFromと同じ。
long totalBytes = meta.totalSamples * mDeviceFormat.BytesPerFrame();
mWasapi.AddPlayPcmDataAllocateMemory(idx, totalBytes);
}
else
{
// 共有モードの時。サンプルレート変換する。
long totalBytes = (meta.totalSamples * mDeviceFormat.SampleRate / mFromFormat.SampleRate) * mDeviceFormat.BytesPerFrame();
mWasapi.AddPlayPcmDataAllocateMemory(idx, totalBytes);
var resampleFrom = new WWMFResamplerCs.WWPcmFormat(WWMFResamplerCs.WWPcmFormat.SampleFormat.SF_Int,
mFromFormat.NumChannels, mFromFormat.UseBitsPerSample(), mFromFormat.SampleRate,
WasapiCS.GetTypicalChannelMask(mFromFormat.NumChannels), mFromFormat.ValidBitsPerSample());
var resampleTo = new WWMFResamplerCs.WWPcmFormat(WWMFResamplerCs.WWPcmFormat.SampleFormat.SF_Float,
mDeviceFormat.NumChannels, mDeviceFormat.UseBitsPerSample(), mDeviceFormat.SampleRate,
mDeviceFormat.DwChannelMask, mDeviceFormat.ValidBitsPerSample());
hr = mMfResampler.Init(resampleFrom, resampleTo, 60);
if (hr < 0)
{
Console.WriteLine("mMfResampler.Init() failed {0:X8}", hr);
}
}
return(hr);
}
private void SetSampleDataToWasapiStart(int idx, WWFlacRWCS.FlacRW flac)
{
WWFlacRWCS.Metadata meta;
flac.GetDecodedMetadata(out meta);
mFromFormat = new DeviceFormat();
mFromFormat.Set(meta.channels, meta.sampleRate,
WasapiCS.BitAndFormatToSampleFormatType(meta.bitsPerSample, meta.bitsPerSample, WasapiCS.BitFormatType.SInt));
long totalBytes = meta.totalSamples * mDeviceFormat.BytesPerFrame();
mWasapi.AddPlayPcmDataAllocateMemory(idx, totalBytes);
mDecodedPcmOffs = 0;
}