public bool FindAudioInfo(ref WM_MEDIA_TYPE mediaType, ref WaveFormat waveFormat)
{
bool success = false;
IWMStreamConfig stream = null;
IWMMediaProps props = null;
Guid mediaTypeGuid;
IWMProfile profile = (IWMProfile)_reader;
for (uint i = 0; i < _readerStreamCount; i++)
{
profile.GetStream(i, out stream);
props = (IWMMediaProps)stream;
WMMediaProps mediaProps = new WMMediaProps(props);
mediaType = mediaProps.MediaType;
mediaTypeGuid = mediaType.majortype;
if (mediaTypeGuid == MediaTypes.WMMEDIATYPE_Audio)
{
Logger.WriteLogMessage("Found audio stream [" + i + "], format type [" + mediaType.formattype + "].");
waveFormat = (WaveFormat)Marshal.PtrToStructure(mediaType.pbFormat, typeof(WaveFormat));
success = true;
break;
}
}
return(success);
}
public void FindAudioOutputFormat(uint outputNum, ref WM_MEDIA_TYPE mediaType, ref Guid subtype, ref WaveFormat waveFormat)
{
IWMOutputMediaProps readerOutputProps = null;
uint bufferSize = (uint)(Marshal.SizeOf(typeof(WM_MEDIA_TYPE)) + Marshal.SizeOf(typeof(WaveFormat)));
uint formatCount;
Logger.WriteLogMessage("Finding audio output formats for reader, output [" + outputNum + "].");
_reader.GetOutputFormatCount(outputNum, out formatCount);
Logger.WriteLogMessage("Reader can produce " + formatCount + " possible audio output formats.");
IntPtr buffer = Marshal.AllocCoTaskMem((int)bufferSize);
try
{
for (uint j = 0; j < formatCount; j++)
{
uint size = 0;
_reader.GetOutputFormat(outputNum, j, out readerOutputProps);
readerOutputProps.GetMediaType(IntPtr.Zero, ref size);
if (size > bufferSize)
{
bufferSize = size;
Marshal.FreeCoTaskMem(buffer);
buffer = Marshal.AllocCoTaskMem((int)bufferSize);
}
readerOutputProps.GetMediaType(buffer, ref size);
mediaType = (WM_MEDIA_TYPE)Marshal.PtrToStructure(buffer, typeof(WM_MEDIA_TYPE));
if (mediaType.formattype == FormatTypes.WMFORMAT_WaveFormatEx)
{
Logger.WriteLogMessage("Walking output format [" + j + "], format type [" + GetFormatTypeName(mediaType.formattype) + "], subtype [" + GetSubTypeName(mediaType.subtype) + "], sample size [" + mediaType.lSampleSize + "].");
//
// NOTE: only look for PCM subtypes
//
if (mediaType.subtype == MediaSubTypes.WMMEDIASUBTYPE_PCM)
{
subtype = mediaType.subtype;
Logger.WriteLogMessage("- Found PCM sub type, grabbing WaveFormat.");
waveFormat = (WaveFormat)Marshal.PtrToStructure(mediaType.pbFormat, typeof(WaveFormat));
WaveFormats format = (WaveFormats)waveFormat.wFormatTag;
Logger.WriteLogMessage("- format [" + format + "], sample rate [" + waveFormat.nSamplesPerSec + "], bits per sample [" + waveFormat.wBitsPerSample +
"], bytes/sec [" + waveFormat.nAvgBytesPerSec + "], channels [" + waveFormat.nChannels + "].");
_reader.SetOutputProps(outputNum, readerOutputProps);
break;
}
}
}
}
finally
{
Marshal.FreeCoTaskMem(buffer);
}
Marshal.ReleaseComObject(readerOutputProps);
}
public void FindVideoOutputFormat(uint outputNum, ref WM_MEDIA_TYPE mediaType, ref Guid subtype, ref VideoInfoHeader outputVideoInfoHeader)
{
IWMOutputMediaProps readerOutputProps = null;
uint bufferSize = (uint)(Marshal.SizeOf(typeof(WM_MEDIA_TYPE)) + Marshal.SizeOf(typeof(VideoInfoHeader)));
uint formatCount;
Logger.WriteLogMessage("Finding video output formats for reader, output [" + outputNum + "].");
_reader.GetOutputFormatCount(outputNum, out formatCount);
Logger.WriteLogMessage("Reader can produce " + formatCount + " possible video output formats.");
IntPtr buffer = Marshal.AllocCoTaskMem((int)bufferSize);
try
{
for (uint j = 0; j < formatCount; j++)
{
uint size = 0;
_reader.GetOutputFormat(outputNum, j, out readerOutputProps);
readerOutputProps.GetMediaType(IntPtr.Zero, ref size);
if (size > bufferSize)
{
bufferSize = size;
Marshal.FreeCoTaskMem(buffer);
buffer = Marshal.AllocCoTaskMem((int)bufferSize);
}
readerOutputProps.GetMediaType(buffer, ref size);
mediaType = (WM_MEDIA_TYPE)Marshal.PtrToStructure(buffer, typeof(WM_MEDIA_TYPE));
if (mediaType.formattype == FormatTypes.WMFORMAT_VideoInfo)
{
Logger.WriteLogMessage("Walking output format [" + j + "], format type [" + GetFormatTypeName(mediaType.formattype) + "], subtype [" + GetSubTypeName(mediaType.subtype) + "], sample size [" + mediaType.lSampleSize + "].");
//
// NOTE: only look for RGB subtypes
//
if ((mediaType.subtype == MediaSubTypes.WMMEDIASUBTYPE_RGB555) ||
(mediaType.subtype == MediaSubTypes.WMMEDIASUBTYPE_RGB24) ||
(mediaType.subtype == MediaSubTypes.WMMEDIASUBTYPE_RGB32))
{
Logger.WriteLogMessage("- Found RGB555, RGB24 or RGB32 sub type, grabbing VideoInfoHeader.");
subtype = mediaType.subtype;
outputVideoInfoHeader = (VideoInfoHeader)Marshal.PtrToStructure(mediaType.pbFormat, typeof(VideoInfoHeader));
Logger.WriteLogMessage("- width [" + outputVideoInfoHeader.bmiHeader.biWidth + "], height [" + outputVideoInfoHeader.bmiHeader.biHeight + "], dwBitrate [" + outputVideoInfoHeader.dwBitRate + "], dwBitErrorRate [" + outputVideoInfoHeader.dwBitErrorRate + "].");
_reader.SetOutputProps(outputNum, readerOutputProps);
break;
}
}
}
}
finally
{
Marshal.FreeCoTaskMem(buffer);
}
Marshal.ReleaseComObject(readerOutputProps);
}
public bool FindAudioInfo(ref WM_MEDIA_TYPE mediaType, ref WaveFormat waveFormat)
{
bool success = false;
IWMStreamConfig stream = null;
IWMMediaProps props = null;
Guid mediaTypeGuid;
IWMProfile profile = (IWMProfile)_reader;
for (uint i = 0; i < _readerStreamCount; i++)
{
profile.GetStream(i, out stream);
props = (IWMMediaProps)stream;
WMMediaProps mediaProps = new WMMediaProps(props);
mediaType = mediaProps.MediaType;
mediaTypeGuid = mediaType.majortype;
if (mediaTypeGuid == MediaTypes.WMMEDIATYPE_Audio)
{
Logger.WriteLogMessage("Found audio stream [" + i + "], format type [" + mediaType.formattype + "].");
waveFormat = (WaveFormat)Marshal.PtrToStructure(mediaType.pbFormat, typeof(WaveFormat));
success = true;
break;
}
}
return success;
}
public void FindAudioOutputFormat(uint outputNum, ref WM_MEDIA_TYPE mediaType, ref Guid subtype, ref WaveFormat waveFormat)
{
IWMOutputMediaProps readerOutputProps = null;
uint bufferSize = (uint)(Marshal.SizeOf(typeof(WM_MEDIA_TYPE)) + Marshal.SizeOf(typeof(WaveFormat)));
uint formatCount;
Logger.WriteLogMessage("Finding audio output formats for reader, output [" + outputNum + "].");
_reader.GetOutputFormatCount(outputNum, out formatCount);
Logger.WriteLogMessage("Reader can produce " + formatCount + " possible audio output formats.");
IntPtr buffer = Marshal.AllocCoTaskMem((int)bufferSize);
try
{
for (uint j = 0; j < formatCount; j++)
{
uint size = 0;
_reader.GetOutputFormat(outputNum, j, out readerOutputProps);
readerOutputProps.GetMediaType(IntPtr.Zero, ref size);
if (size > bufferSize)
{
bufferSize = size;
Marshal.FreeCoTaskMem(buffer);
buffer = Marshal.AllocCoTaskMem((int)bufferSize);
}
readerOutputProps.GetMediaType(buffer, ref size);
mediaType = (WM_MEDIA_TYPE)Marshal.PtrToStructure(buffer, typeof(WM_MEDIA_TYPE));
if (mediaType.formattype == FormatTypes.WMFORMAT_WaveFormatEx)
{
Logger.WriteLogMessage("Walking output format [" + j + "], format type [" + GetFormatTypeName(mediaType.formattype) + "], subtype [" + GetSubTypeName(mediaType.subtype) + "], sample size [" + mediaType.lSampleSize + "].");
//
// NOTE: only look for PCM subtypes
//
if (mediaType.subtype == MediaSubTypes.WMMEDIASUBTYPE_PCM)
{
subtype = mediaType.subtype;
Logger.WriteLogMessage("- Found PCM sub type, grabbing WaveFormat.");
waveFormat = (WaveFormat)Marshal.PtrToStructure(mediaType.pbFormat, typeof(WaveFormat));
WaveFormats format = (WaveFormats)waveFormat.wFormatTag;
Logger.WriteLogMessage("- format [" + format + "], sample rate [" + waveFormat.nSamplesPerSec + "], bits per sample [" + waveFormat.wBitsPerSample +
"], bytes/sec [" + waveFormat.nAvgBytesPerSec + "], channels [" + waveFormat.nChannels + "].");
_reader.SetOutputProps(outputNum, readerOutputProps);
break;
}
}
}
}
finally
{
Marshal.FreeCoTaskMem(buffer);
}
Marshal.ReleaseComObject(readerOutputProps);
}
public void FindVideoOutputFormat(uint outputNum, ref WM_MEDIA_TYPE mediaType, ref Guid subtype, ref VideoInfoHeader outputVideoInfoHeader)
{
IWMOutputMediaProps readerOutputProps = null;
uint bufferSize = (uint)(Marshal.SizeOf(typeof(WM_MEDIA_TYPE)) + Marshal.SizeOf(typeof(VideoInfoHeader)));
uint formatCount;
Logger.WriteLogMessage("Finding video output formats for reader, output [" + outputNum + "].");
_reader.GetOutputFormatCount(outputNum, out formatCount);
Logger.WriteLogMessage("Reader can produce " + formatCount + " possible video output formats.");
IntPtr buffer = Marshal.AllocCoTaskMem((int)bufferSize);
try
{
for (uint j = 0; j < formatCount; j++)
{
uint size = 0;
_reader.GetOutputFormat(outputNum, j, out readerOutputProps);
readerOutputProps.GetMediaType(IntPtr.Zero, ref size);
if (size > bufferSize)
{
bufferSize = size;
Marshal.FreeCoTaskMem(buffer);
buffer = Marshal.AllocCoTaskMem((int)bufferSize);
}
readerOutputProps.GetMediaType(buffer, ref size);
mediaType = (WM_MEDIA_TYPE)Marshal.PtrToStructure(buffer, typeof(WM_MEDIA_TYPE));
if (mediaType.formattype == FormatTypes.WMFORMAT_VideoInfo)
{
Logger.WriteLogMessage("Walking output format [" + j + "], format type [" + GetFormatTypeName(mediaType.formattype) + "], subtype [" + GetSubTypeName(mediaType.subtype) + "], sample size [" + mediaType.lSampleSize + "].");
//
// NOTE: only look for RGB subtypes
//
if ((mediaType.subtype == MediaSubTypes.WMMEDIASUBTYPE_RGB555) ||
(mediaType.subtype == MediaSubTypes.WMMEDIASUBTYPE_RGB24) ||
(mediaType.subtype == MediaSubTypes.WMMEDIASUBTYPE_RGB32))
{
Logger.WriteLogMessage("- Found RGB555, RGB24 or RGB32 sub type, grabbing VideoInfoHeader.");
subtype = mediaType.subtype;
outputVideoInfoHeader = (VideoInfoHeader)Marshal.PtrToStructure(mediaType.pbFormat, typeof(VideoInfoHeader));
Logger.WriteLogMessage("- width [" + outputVideoInfoHeader.bmiHeader.biWidth + "], height [" + outputVideoInfoHeader.bmiHeader.biHeight + "], dwBitrate [" + outputVideoInfoHeader.dwBitRate + "], dwBitErrorRate [" + outputVideoInfoHeader.dwBitErrorRate + "].");
_reader.SetOutputProps(outputNum, readerOutputProps);
break;
}
}
}
}
finally
{
Marshal.FreeCoTaskMem(buffer);
}
Marshal.ReleaseComObject(readerOutputProps);
}
