/// <summary>
/// Converts sample format to toFormat and returns new instance of PcmData.
/// pcmFrom is not changed.
/// </summary>
/// <param name="toFormat">sample format to convert</param>
/// <returns>Newly instanciated PcmData</returns>
public PcmData Convert(PcmData pcmFrom, WasapiCS.SampleFormatType toFormat, BitsPerSampleConvArgs args)
{
if (args == null)
{
args = new BitsPerSampleConvArgs(NoiseShapingType.None);
}
var fromFormat = WasapiCS.BitAndFormatToSampleFormatType(pcmFrom.BitsPerSample, pcmFrom.ValidBitsPerSample,
SampleFormatInfo.VrtToBft(pcmFrom.SampleValueRepresentationType));
if (fromFormat == WasapiCS.SampleFormatType.Unknown ||
toFormat == WasapiCS.SampleFormatType.Unknown)
{
return(null);
}
var newSampleArray = mConvert[(int)fromFormat][(int)toFormat](pcmFrom, toFormat, args);
PcmData newPcmData = new PcmData();
newPcmData.CopyHeaderInfoFrom(pcmFrom);
newPcmData.SetFormat(pcmFrom.NumChannels,
WasapiCS.SampleFormatTypeToUseBitsPerSample(toFormat),
WasapiCS.SampleFormatTypeToValidBitsPerSample(toFormat), pcmFrom.SampleRate,
SampleFormatInfo.BftToVrt(WasapiCS.SampleFormatTypeToBitFormatType(toFormat)), pcmFrom.NumFrames);
newPcmData.SetSampleArray(newSampleArray);
return(newPcmData);
}
public bool IsNoiseShapingOrDitherCapable(PcmData pdFrom, WasapiCS.SampleFormatType toFormat)
{
return(mConv.IsConversionNoiseshapingOrDitherCapable(
WasapiCS.BitAndFormatToSampleFormatType(pdFrom.BitsPerSample, pdFrom.ValidBitsPerSample,
SampleFormatInfo.VrtToBft(pdFrom.SampleValueRepresentationType)), toFormat));
}
/// <summary>
/// PcmDataの形式と、(共有・排他)、フォーマット固定設定から、
/// デバイスに設定されるビットフォーマットを取得。
///
/// これは、内容的にテーブルなので、テーブルにまとめたほうが良い。
/// </summary>
/// <returns>デバイスに設定されるビットフォーマット</returns>
static public SampleFormatInfo CreateSetupSampleFormat(
WasapiSharedOrExclusiveType sharedOrExclusive,
BitsPerSampleFixType bitsPerSampleFixType,
int bitsPerSample,
int validBitsPerSample,
PcmDataLib.PcmData.ValueRepresentationType vrt,
int candidateId)
{
SampleFormatInfo sf = new SampleFormatInfo();
if (sharedOrExclusive == WasapiSharedOrExclusiveType.Shared)
{
// 共有モード
sf.bitsPerSample = bitsPerSample;
sf.validBitsPerSample = validBitsPerSample;
sf.bitFormatType = SampleFormatInfo.VrtToBft(vrt);
return(sf);
}
// 排他モード
switch (bitsPerSampleFixType)
{
case BitsPerSampleFixType.Sint16:
sf.bitFormatType = WasapiCS.BitFormatType.SInt;
sf.bitsPerSample = 16;
sf.validBitsPerSample = 16;
break;
case BitsPerSampleFixType.Sint24:
sf.bitFormatType = WasapiCS.BitFormatType.SInt;
sf.bitsPerSample = 24;
sf.validBitsPerSample = 24;
break;
case BitsPerSampleFixType.Sint32:
sf.bitFormatType = WasapiCS.BitFormatType.SInt;
sf.bitsPerSample = 32;
sf.validBitsPerSample = 32;
break;
case BitsPerSampleFixType.Sint32V24:
sf.bitFormatType = WasapiCS.BitFormatType.SInt;
sf.bitsPerSample = 32;
sf.validBitsPerSample = 24;
break;
case BitsPerSampleFixType.Sfloat32:
sf.bitFormatType = WasapiCS.BitFormatType.SFloat;
sf.bitsPerSample = 32;
sf.validBitsPerSample = 32;
break;
case BitsPerSampleFixType.AutoSelect:
WasapiCS.SampleFormatType sampleFormat = WasapiCS.SampleFormatType.Sint16;
switch (validBitsPerSample)
{
case 16:
sampleFormat = mTryFormat16[candidateId];
break;
case 24:
default: /* ? */
sampleFormat = mTryFormat24[candidateId];
break;
case 32:
sampleFormat = mTryFormat32[candidateId];
break;
}
sf.bitFormatType = WasapiCS.BitFormatType.SInt;
sf.bitsPerSample = WasapiCS.SampleFormatTypeToUseBitsPerSample(sampleFormat);
sf.validBitsPerSample = WasapiCS.SampleFormatTypeToValidBitsPerSample(sampleFormat);
break;
default:
System.Diagnostics.Debug.Assert(false);
break;
}
return(sf);
}