public static WaveFormatExtensible FromMediaType(AMMediaType pMediaType)
{
if (MediaType.Audio != pMediaType.majorType)
{
throw new Exception("not Audio");
}
if (FormatType.WaveEx != pMediaType.formatType || pMediaType.formatSize < 18)
{
throw new Exception("not WaveEx");
}
WaveFormatEx pWfx = new WaveFormatEx();
Marshal.PtrToStructure(pMediaType.formatPtr, pWfx);
if (pWfx.wFormatTag == unchecked ((short)WAVE_FORMAT_EXTENSIBLE) && pWfx.cbSize >= 22)
{
var pWfe = new WaveFormatExtensible();
Marshal.PtrToStructure(pMediaType.formatPtr, pWfe);
return(pWfe);
}
return(new WaveFormatExtensible()
{
nChannels = pWfx.nChannels,
nSamplesPerSec = pWfx.nSamplesPerSec,
nBlockAlign = pWfx.nBlockAlign,
wBitsPerSample = pWfx.wBitsPerSample,
nAvgBytesPerSec = pWfx.nAvgBytesPerSec,
wFormatTag = pWfx.wFormatTag,
cbSize = 0
});
}
public WMAWriter(string path, WMAWriterSettings settings)
{
this.m_settings = settings;
this.outputPath = path;
try
{
m_pWriter = settings.GetWriter();
int cInputs;
m_pWriter.GetInputCount(out cInputs);
if (cInputs < 1)
{
throw new InvalidOperationException();
}
IWMInputMediaProps pInput;
m_pWriter.GetInputProps(0, out pInput);
try
{
int cbType = 0;
AMMediaType pMediaType = null;
pInput.GetMediaType(pMediaType, ref cbType);
pMediaType = new AMMediaType();
pMediaType.formatSize = cbType - Marshal.SizeOf(typeof(AMMediaType));
pInput.GetMediaType(pMediaType, ref cbType);
try
{
var wfe = new WaveFormatExtensible(m_settings.PCM);
Marshal.FreeCoTaskMem(pMediaType.formatPtr);
pMediaType.formatPtr = IntPtr.Zero;
pMediaType.formatSize = 0;
pMediaType.formatPtr = Marshal.AllocCoTaskMem(Marshal.SizeOf(wfe));
pMediaType.formatSize = Marshal.SizeOf(wfe);
Marshal.StructureToPtr(wfe, pMediaType.formatPtr, false);
pInput.SetMediaType(pMediaType);
m_pWriter.SetInputProps(0, pInput);
}
finally
{
WMUtils.FreeWMMediaType(pMediaType);
}
}
finally
{
Marshal.ReleaseComObject(pInput);
}
}
catch (Exception ex)
{
if (m_pWriter != null)
{
Marshal.ReleaseComObject(m_pWriter);
m_pWriter = null;
}
throw ex;
}
}
public AudioDecoder(string path, Stream IO)
{
m_path = path;
isValid(path);
bool pfIsProtected;
WMUtils.WMIsContentProtected(path, out pfIsProtected);
if (pfIsProtected)
{
throw new Exception("DRM present");
}
WMUtils.WMCreateSyncReader(IntPtr.Zero, Rights.None, out m_syncReader);
if (path == null)
{
m_IO = IO != null ? IO : new FileStream(path, FileMode.Open, FileAccess.Read, FileShare.Read, 0x10000);
m_streamWrapper = new StreamWrapper(m_IO);
m_syncReader.OpenStream(m_streamWrapper);
}
else
{
m_syncReader.Open(path);
}
var pProfile = (m_syncReader as IWMProfile);
int dwStreamCount;
pProfile.GetStreamCount(out dwStreamCount);
for (int dwIndex = 0; dwIndex < dwStreamCount; dwIndex++)
{
IWMStreamConfig pConfig = null;
pProfile.GetStream(dwIndex, out pConfig);
try
{
Guid guid;
pConfig.GetStreamType(out guid);
if (MediaType.Audio != guid)
{
continue;
}
short wStreamNum;
pConfig.GetStreamNumber(out wStreamNum);
int dwBitrate = -1;
pConfig.GetBitrate(out dwBitrate);
var pIWMMediaProps = pConfig as IWMMediaProps;
int cbType = 0;
pIWMMediaProps.GetMediaType(null, ref cbType);
var pMediaType = new AMMediaType();
pMediaType.formatSize = cbType;
pIWMMediaProps.GetMediaType(pMediaType, ref cbType);
if (pMediaType.formatType != FormatType.WaveEx)
{
continue;
}
if (pMediaType.subType != MediaSubType.WMAudio_Lossless)
{
continue;
}
m_wStreamNum = wStreamNum;
pcm = WaveFormatExtensible.FromMediaType(pMediaType).GetConfig();
break;
}
finally
{
Marshal.ReleaseComObject(pConfig);
}
}
if (m_wStreamNum == -1)
{
throw new Exception("No WMA lossless streams found");
}
m_syncReader.SetReadStreamSamples(m_wStreamNum, false);
bool pfCompressed;
m_syncReader.GetReadStreamSamples(m_wStreamNum, out pfCompressed);
if (pfCompressed)
{
throw new Exception("doesn't decompress");
}
m_syncReader.GetOutputNumberForStream(m_wStreamNum, out m_dwAudioOutputNum);
IWMOutputMediaProps pProps;
m_syncReader.GetOutputProps(m_dwAudioOutputNum, out pProps);
try
{
StringBuilder sName = null;
AMMediaType pMediaType = null;
int cbType = 0;
cbType = 0;
pMediaType = null;
pProps.GetMediaType(pMediaType, ref cbType);
// Get the name of the output we'll be using
sName = null;
short iName = 0;
pProps.GetConnectionName(sName, ref iName);
sName = new StringBuilder(iName);
pProps.GetConnectionName(sName, ref iName);
if (pcm.ChannelCount > 2)
{
m_syncReader.SetOutputSetting(m_dwAudioOutputNum, Constants.g_wszEnableDiscreteOutput, AttrDataType.BOOL, new byte[] { 1, 0, 0, 0 }, 4);
m_syncReader.SetOutputSetting(m_dwAudioOutputNum, Constants.g_wszSpeakerConfig, AttrDataType.DWORD, new byte[] { 0, 0, 0, 0 }, 4);
}
pMediaType = new AMMediaType();
pMediaType.formatSize = cbType - Marshal.SizeOf(typeof(AMMediaType));
//
// Get the value for MediaType
//
pProps.GetMediaType(pMediaType, ref cbType);
try
{
if (MediaType.Audio != pMediaType.majorType)
{
throw new Exception("not Audio");
}
if (FormatType.WaveEx != pMediaType.formatType)
{
throw new Exception("not WaveEx");
}
var wfe = new WaveFormatExtensible(pcm);
Marshal.FreeCoTaskMem(pMediaType.formatPtr);
pMediaType.formatPtr = IntPtr.Zero;
pMediaType.formatSize = 0;
pMediaType.formatPtr = Marshal.AllocCoTaskMem(Marshal.SizeOf(wfe));
pMediaType.formatSize = Marshal.SizeOf(wfe);
Marshal.StructureToPtr(wfe, pMediaType.formatPtr, false);
pProps.SetMediaType(pMediaType);
m_syncReader.SetOutputProps(m_dwAudioOutputNum, pProps);
}
finally
{
WMUtils.FreeWMMediaType(pMediaType);
}
}
finally
{
Marshal.ReleaseComObject(pProps);
}
//try
//{
// AttrDataType wmtType;
// short cbLength = 0;
// short wAnyStream = 0;
// var pHeaderInfo = m_syncReader as IWMHeaderInfo;
// pHeaderInfo.GetAttributeByName(ref wAnyStream, Constants.g_wszWMDuration, out wmtType, null, ref cbLength);
// var pbValue = new byte[cbLength];
// pHeaderInfo.GetAttributeByName(ref wAnyStream, Constants.g_wszWMDuration, out wmtType, pbValue, ref cbLength);
// var m_cnsFileDuration = BitConverter.ToInt64(pbValue, 0);
// _sampleCount = m_cnsFileDuration * m_pWfx.nSamplesPerSec / 10000000;
// // NOT ACCURATE ENOUGH (~1ms precision observed)
//}
//catch (COMException)
//{
//}
//try
//{
// var pHeaderInfo = m_syncReader as IWMHeaderInfo2;
// int nCodec;
// pHeaderInfo.GetCodecInfoCount(out nCodec);
// for (int wIndex = 0; wIndex < nCodec; wIndex++)
// {
// CodecInfoType enumCodecType;
// short cchName = 0;
// short cchDescription = 0;
// short cbCodecInfo = 0;
// pHeaderInfo.GetCodecInfo(wIndex, ref cchName, null,
// ref cchDescription, null, out enumCodecType,
// ref cbCodecInfo, null);
// var pwszName = new StringBuilder(cchName);
// var pwszDescription = new StringBuilder(cchDescription);
// var pbCodecInfo = new byte[cbCodecInfo];
// pHeaderInfo.GetCodecInfo(wIndex, ref cchName, pwszName,
// ref cchDescription, pwszDescription, out enumCodecType,
// ref cbCodecInfo, pbCodecInfo);
// if (enumCodecType == CodecInfoType.Audio)
// {
// // pbCodecInfo = {99,1} ??/
// }
// }
//}
//catch (COMException)
//{
//}
//int cbMax;
//m_syncReader.GetMaxOutputSampleSize(m_dwAudioOutputNum, out cbMax);
}
internal IEnumerable <WMAFormatInfo> EnumerateFormatInfo(IWMProfileManager pProfileManager2)
{
IWMProfileManager pProfileManager = null;
try
{
if (pProfileManager2 == null)
{
WMUtils.WMCreateProfileManager(out pProfileManager);
}
var pCodecInfo3 = (pProfileManager2 ?? pProfileManager) as IWMCodecInfo3;
int cCodecs;
pCodecInfo3.GetCodecInfoCount(MediaType.Audio, out cCodecs);
for (int iCodec = 0; iCodec < cCodecs; iCodec++)
{
int szCodecName = 0;
pCodecInfo3.GetCodecName(MediaType.Audio, iCodec, null, ref szCodecName);
var codecName = new StringBuilder(szCodecName);
pCodecInfo3.GetCodecName(MediaType.Audio, iCodec, codecName, ref szCodecName);
var attrDataType = new AttrDataType();
int dwAttrSize = 0;
byte[] pAttrValue = new byte[4];
pCodecInfo3.GetCodecProp(MediaType.Audio, iCodec, Constants.g_wszIsVBRSupported, out attrDataType, pAttrValue, ref dwAttrSize);
if (pAttrValue[0] != 1)
{
continue;
}
if (m_vbr)
{
pCodecInfo3.SetCodecEnumerationSetting(MediaType.Audio, iCodec, Constants.g_wszVBREnabled, AttrDataType.BOOL, new byte[] { 1, 0, 0, 0 }, 4);
pCodecInfo3.SetCodecEnumerationSetting(MediaType.Audio, iCodec, Constants.g_wszNumPasses, AttrDataType.DWORD, new byte[] { 1, 0, 0, 0 }, 4);
}
else
{
pCodecInfo3.SetCodecEnumerationSetting(MediaType.Audio, iCodec, Constants.g_wszVBREnabled, AttrDataType.BOOL, new byte[] { 0, 0, 0, 0 }, 4);
}
int cFormat;
pCodecInfo3.GetCodecFormatCount(MediaType.Audio, iCodec, out cFormat);
for (int iFormat = 0; iFormat < cFormat; iFormat++)
{
IWMStreamConfig pStreamConfig;
int cchDesc = 1024;
StringBuilder szDesc = new StringBuilder(cchDesc);
pCodecInfo3.GetCodecFormatDesc(MediaType.Audio, iCodec, iFormat, out pStreamConfig, szDesc, ref cchDesc);
if (szDesc.ToString().Contains("(A/V)"))
{
continue;
}
try
{
var pProps = pStreamConfig as IWMMediaProps;
int cbType = 0;
AMMediaType pMediaType = null;
pProps.GetMediaType(pMediaType, ref cbType);
pMediaType = new AMMediaType();
pMediaType.formatSize = cbType - Marshal.SizeOf(typeof(AMMediaType));
pProps.GetMediaType(pMediaType, ref cbType);
try
{
if (pMediaType.majorType == MediaType.Audio && pMediaType.formatType == FormatType.WaveEx && pMediaType.subType == m_subType)
{
var pcm = WaveFormatExtensible.FromMediaType(pMediaType).GetConfig();
if (PCM == null || (pcm.ChannelCount == PCM.ChannelCount && pcm.SampleRate == PCM.SampleRate && pcm.BitsPerSample >= PCM.BitsPerSample))
{
yield return new WMAFormatInfo()
{
codec = iCodec,
codecName = codecName.ToString(),
format = iFormat,
formatName = szDesc.ToString(),
subType = pMediaType.subType,
pcm = pcm
}
}
;
}
}
finally
{
WMUtils.FreeWMMediaType(pMediaType);
}
}
finally
{
Marshal.ReleaseComObject(pStreamConfig);
}
}
}
}
finally
{
if (pProfileManager != null)
{
Marshal.ReleaseComObject(pProfileManager);
}
}
}