/// <summary>
/// Hardcode audio config for testing.
/// </summary>
/// <returns></returns>
public bool ConfigAudio()
{
//make up some media types for testing
WAVEFORMATEX wfex = new WAVEFORMATEX();
wfex.FormatTag = 1; //1==WAVE_FORMAT_PCM
wfex.Channels = 1;
wfex.SamplesPerSec = 16000;
wfex.AvgBytesPerSec = 32000;
wfex.BlockAlign = 2;
wfex.BitsPerSample = 16;
wfex.Size = 0;
IntPtr wfexPtr = Marshal.AllocCoTaskMem(Marshal.SizeOf(wfex));
Marshal.StructureToPtr(wfex, wfexPtr, true);
_WMMediaType mt = new _WMMediaType();
mt.majortype = WMGuids.ToGUID(WMGuids.WMMEDIATYPE_Audio);
mt.subtype = WMGuids.ToGUID(WMGuids.WMMEDIASUBTYPE_PCM);
mt.bFixedSizeSamples = 1; //true
mt.bTemporalCompression = 0; //false
mt.lSampleSize = 2;
mt.formattype = WMGuids.ToGUID(WMGuids.WMFORMAT_WaveFormatEx); //This is the only value permitted.
mt.pUnk = null;
mt.cbFormat = (uint)Marshal.SizeOf(wfex) + wfex.Size;
mt.pbFormat = wfexPtr;
try
{
// Used GetMediaType to sanity check the managed structs:
//uint size = 0;
//audioProps.GetMediaType(IntPtr.Zero,ref size);
//IntPtr mtPtr = Marshal.AllocCoTaskMem((int)size);
//audioProps.GetMediaType(mtPtr,ref size);
//_WMMediaType mt2 = (_WMMediaType)Marshal.PtrToStructure(mtPtr,typeof(_WMMediaType));
//WMMediaType.WaveFormatEx wfex2 = (WMMediaType.WaveFormatEx)Marshal.PtrToStructure(mt2.pbFormat,typeof(WMMediaType.WaveFormatEx));
// Examine here.
//Marshal.StructureToPtr(mt,mtPtr,true);
//audioProps.SetMediaType( mtPtr );
}
catch (Exception e)
{
eventLog.WriteEntry("Failed to set audio properties: " + e.ToString(), EventLogEntryType.Error, 1000);
Debug.WriteLine("Failed to set audio properties: " + e.ToString());
return(false);
}
bool ret = ConfigAudio(mt);
Marshal.FreeCoTaskMem(wfexPtr);
return(ret);
}
/// <summary>
/// Configure audio media type.
/// </summary>
public bool ConfigAudio(_WMMediaType mt)
{
if (audioProps == null)
{
Debug.WriteLine("Failed to configure audio: properties is null.");
return(false);
}
try
{
audioProps.SetMediaType(ref mt);
writer.SetInputProps(audioInput, audioProps);
}
catch (Exception e)
{
eventLog.WriteEntry("Failed to set audio properties: " + e.ToString(), EventLogEntryType.Error, 1000);
Debug.WriteLine("Failed to set audio properties: " + e.ToString());
return(false);
}
return(true);
}
/// <summary>
/// Copy the LST managed MediaType to the Windows Media Interop type
/// </summary>
/// <param name="mt"></param>
/// <returns></returns>
private _WMMediaType ConvertMediaType(UW.CSE.MDShow.MediaType mt)
{
_WMMediaType wmt = new _WMMediaType();
if (mt == null)
{
return(wmt);
}
if (mt.MajorType == UW.CSE.MDShow.MajorType.Video)
{
// Basic video settings:
//int w=320;
//int h=240;
//int fps=30;
// For RGB24:
//ushort bpp=24;
//uint comp=0;
//GUID stype = WMGuids.ToGUID(WMGuids.WMMEDIASUBTYPE_RGB24);
// ..or for I420:
//WORD bpp=12;
//DWORD comp=0x30323449;
//GUID stype= WMMEDIASUBTYPE_I420;
// Settings for the video stream:
// BITMAPINFOHEADER
// DWORD biSize = size of the struct in bytes.. 40
// LONG biWidth - Frame width
// LONG biHeight - height could be negative indicating top-down dib.
// WORD biPlanes - must be 1.
// WORD biBitCount 24 in our sample with RGB24
// DWORD biCompression 0 for RGB
// DWORD biSizeImage in bytes.. biWidth*biHeight*biBitCount/8
// LONG biXPelsPerMeter 0
// LONG biYPelsPerMeter 0;
// DWORD biClrUsed must be 0
// DWORD biClrImportant 0
//
// notes:
// biCompression may be a packed 'fourcc' code, for example I420 is 0x30323449, IYUV = 0x56555949...
// I420 and IYUV are identical formats. They use 12 bits per pixel, and are planar, comprised of
// nxm Y plane followed by n/2 x m/2 U and V planes. Each plane is 8bits deep.
//BitmapInfo bi = new BitmapInfo();
//bi.Size=(uint)Marshal.SizeOf(bi);
//bi.Width = w;
//bi.Height = h;
//bi.Planes = 1; //always 1.
//bi.BitCount = bpp;
//bi.Compression = comp; //RGB is zero.. uncompressed.
//bi.SizeImage = (uint)(w * h * bpp / 8);
//bi.XPelsPerMeter = 0;
//bi.YPelsPerMeter = 0;
//bi.ClrUsed = 0;
//bi.ClrImportant = 0;
// WMVIDEOINFOHEADER
// RECT rcSource;
// RECT rcTarget;
// DWORD dwBitRate.. bps.. Width*Height*BitCount*Rate.. 320*240*24*29.93295=55172414
// DWORD dwBitErrorRate zero in our sample.
// LONGLONG AvgTimePerFrame in 100ns units.. 334080=10000*1000/29.93295
// BITMAPINFOHEADER bmiHeader copy of the above struct.
//VideoInfo vi = new VideoInfo();
//vi.Source.left = 0;
//vi.Source.top = 0;
//vi.Source.bottom = bi.Height;
//vi.Source.right = bi.Width;
//vi.Target = vi.Source;
//vi.BitRate = (uint)(w * h * bpp * fps);
//vi.BitErrorRate = 0;
//vi.AvgTimePerFrame = (UInt64) ((10000 * 1000) / fps);
//vi.BitmapInfo = bi;
UW.CSE.MDShow.MediaTypeVideoInfo vi = mt.ToMediaTypeVideoInfo();
IntPtr viPtr = Marshal.AllocCoTaskMem(Marshal.SizeOf(vi.VideoInfo));
Marshal.StructureToPtr(vi.VideoInfo, viPtr, true);
// WM_MEDIA_TYPE
// GUID majortype WMMEDIATYPE_Video
// GUID subtype WMMEDIASUBTYPE_RGB24 in our sample
// BOOL bFixedSizeSamples TRUE
// BOOL bTemporalCompression FALSE
// ULONG lSampleSize in bytes This was zero in our sample, but could be 320*240*24/8=230400
// GUID formattype WMFORMAT_VideoInfo
// IUnknown* pUnk NULL
// ULONG cbFormat size of the WMVIDEOINFOHEADER
// [size_is(cbFormat)] BYTE *pbFormat pointer to the WMVIDEOINFOHEADER
//Note WM_MEDIA_TYPE is the same as Directshow's AM_MEDIA_TYPE.
//WM_MEDIA_TYPE mt;
wmt.majortype = WMGuids.ToGUID(mt.MajorTypeAsGuid);
wmt.subtype = WMGuids.ToGUID(mt.SubTypeAsGuid);
wmt.bFixedSizeSamples = mt.FixedSizeSamples?1:0;
wmt.bTemporalCompression = mt.TemporalCompression?1:0;
//mt.lSampleSize = w * h * bpp / 8; // this was zero in avinetwrite!
wmt.lSampleSize = 0; //hmm. Don't think it matters??
wmt.formattype = WMGuids.ToGUID(mt.FormatTypeAsGuid);
wmt.pUnk = null;
wmt.cbFormat = (uint)Marshal.SizeOf(vi.VideoInfo);
wmt.pbFormat = viPtr;
//PRI3: redesign so that this is freed:
//Marshal.FreeCoTaskMem(viPtr);
}
else if (mt.MajorType == UW.CSE.MDShow.MajorType.Audio)
{
// WaveFormatEx wfex = new WaveFormatEx();
//
// wfex.FormatTag = 1; //1==WAVE_FORMAT_PCM
// wfex.Channels = 1;
// wfex.SamplesPerSec = 16000;
// wfex.AvgBytesPerSec = 32000;
// wfex.BlockAlign = 2;
// wfex.BitsPerSample = 16;
// wfex.Size = 0;
UW.CSE.MDShow.MediaTypeWaveFormatEx wfex = mt.ToMediaTypeWaveFormatEx();
IntPtr wfexPtr = Marshal.AllocCoTaskMem(Marshal.SizeOf(wfex.WaveFormatEx));
Marshal.StructureToPtr(wfex.WaveFormatEx, wfexPtr, true);
wmt.majortype = WMGuids.ToGUID(mt.MajorTypeAsGuid); //WMGuids.ToGUID(WMGuids.WMMEDIATYPE_Audio);
wmt.subtype = WMGuids.ToGUID(mt.SubTypeAsGuid); //WMGuids.ToGUID(WMGuids.WMMEDIASUBTYPE_PCM);
wmt.bFixedSizeSamples = mt.FixedSizeSamples?1:0; //1; //true
wmt.bTemporalCompression = mt.TemporalCompression?1:0; //0; //false
wmt.lSampleSize = (uint)mt.SampleSize; //2;
wmt.formattype = WMGuids.ToGUID(mt.FormatTypeAsGuid); //WMGuids.ToGUID(WMGuids.WMFORMAT_WaveFormatEx); //This is the only value permitted.
wmt.pUnk = null;
wmt.cbFormat = (uint)Marshal.SizeOf(wfex.WaveFormatEx) + wfex.WaveFormatEx.Size;
wmt.pbFormat = wfexPtr;
//try
//{
// Used GetMediaType to sanity check the managed structs:
//uint size = 0;
//audioProps.GetMediaType(IntPtr.Zero,ref size);
//IntPtr mtPtr = Marshal.AllocCoTaskMem((int)size);
//audioProps.GetMediaType(mtPtr,ref size);
//_WMMediaType mt2 = (_WMMediaType)Marshal.PtrToStructure(mtPtr,typeof(_WMMediaType));
//WMMediaType.WaveFormatEx wfex2 = (WMMediaType.WaveFormatEx)Marshal.PtrToStructure(mt2.pbFormat,typeof(WMMediaType.WaveFormatEx));
// Examine here.
//Marshal.StructureToPtr(mt,mtPtr,true);
//audioProps.SetMediaType( mtPtr );
//}
//catch (Exception e)
//{
// Debug.WriteLine("Failed to set audio properties: " + e.ToString());
// return wmt;
//}
//PRI3: redesign so that this is freed:
//Marshal.FreeCoTaskMem(wfexPtr);
}
return(wmt);
}
/// <summary>
/// Hardcode video config for testing.
/// </summary>
/// <returns></returns>
public bool ConfigVideo()
{
// Basic video settings:
int w = 320;
int h = 240;
int fps = 30;
// For RGB24:
ushort bpp = 24;
uint comp = 0;
GUID stype = WMGuids.ToGUID(WMGuids.WMMEDIASUBTYPE_RGB24);
// ..or for I420:
//WORD bpp=12;
//DWORD comp=0x30323449;
//GUID stype= WMMEDIASUBTYPE_I420;
// Settings for the video stream:
// BITMAPINFOHEADER
// DWORD biSize = size of the struct in bytes.. 40
// LONG biWidth - Frame width
// LONG biHeight - height could be negative indicating top-down dib.
// WORD biPlanes - must be 1.
// WORD biBitCount 24 in our sample with RGB24
// DWORD biCompression 0 for RGB
// DWORD biSizeImage in bytes.. biWidth*biHeight*biBitCount/8
// LONG biXPelsPerMeter 0
// LONG biYPelsPerMeter 0;
// DWORD biClrUsed must be 0
// DWORD biClrImportant 0
//
// notes:
// biCompression may be a packed 'fourcc' code, for example I420 is 0x30323449, IYUV = 0x56555949...
// I420 and IYUV are identical formats. They use 12 bits per pixel, and are planar, comprised of
// nxm Y plane followed by n/2 x m/2 U and V planes. Each plane is 8bits deep.
BITMAPINFOHEADER bi = new BITMAPINFOHEADER();
bi.Size = (uint)Marshal.SizeOf(bi);
bi.Width = w;
bi.Height = h;
bi.Planes = 1; //always 1.
bi.BitCount = bpp;
bi.Compression = comp; //RGB is zero.. uncompressed.
bi.SizeImage = (uint)(w * h * bpp / 8);
bi.XPelsPerMeter = 0;
bi.YPelsPerMeter = 0;
bi.ClrUsed = 0;
bi.ClrImportant = 0;
// WMVIDEOINFOHEADER
// RECT rcSource;
// RECT rcTarget;
// DWORD dwBitRate.. bps.. Width*Height*BitCount*Rate.. 320*240*24*29.93295=55172414
// DWORD dwBitErrorRate zero in our sample.
// LONGLONG AvgTimePerFrame in 100ns units.. 334080=10000*1000/29.93295
// BITMAPINFOHEADER bmiHeader copy of the above struct.
VIDEOINFOHEADER vi = new VIDEOINFOHEADER();
RECT r = new RECT();
r.Left = r.Top = 0;
r.Bottom = bi.Height;
r.Right = bi.Width;
vi.Source = r;
// vi.Source.Left = 0;
// vi.Source.Top = 0;
// vi.Source.Bottom = bi.Height;
// vi.Source.Right = bi.Width;
vi.Target = vi.Source;
vi.BitRate = (uint)(w * h * bpp * fps);
vi.BitErrorRate = 0;
vi.AvgTimePerFrame = (long)((10000 * 1000) / fps);
vi.BitmapInfo = bi;
IntPtr viPtr = Marshal.AllocCoTaskMem(Marshal.SizeOf(vi));
Marshal.StructureToPtr(vi, viPtr, true);
// WM_MEDIA_TYPE
// GUID majortype WMMEDIATYPE_Video
// GUID subtype WMMEDIASUBTYPE_RGB24 in our sample
// BOOL bFixedSizeSamples TRUE
// BOOL bTemporalCompression FALSE
// ULONG lSampleSize in bytes This was zero in our sample, but could be 320*240*24/8=230400
// GUID formattype WMFORMAT_VideoInfo
// IUnknown* pUnk NULL
// ULONG cbFormat size of the WMVIDEOINFOHEADER
// [size_is(cbFormat)] BYTE *pbFormat pointer to the WMVIDEOINFOHEADER
//Note WM_MEDIA_TYPE is the same as Directshow's AM_MEDIA_TYPE.
//WM_MEDIA_TYPE mt;
_WMMediaType mt = new _WMMediaType();
mt.majortype = WMGuids.ToGUID(WMGuids.WMMEDIATYPE_Video);
mt.subtype = stype;
mt.bFixedSizeSamples = 1;
mt.bTemporalCompression = 0;
//mt.lSampleSize = w * h * bpp / 8; // this was zero in avinetwrite!
mt.lSampleSize = 0; //hmm. Don't think it matters??
mt.formattype = WMGuids.ToGUID(WMGuids.WMFORMAT_VideoInfo);
mt.pUnk = null;
mt.cbFormat = (uint)Marshal.SizeOf(vi);
mt.pbFormat = viPtr;
bool ret = ConfigVideo(mt);
Marshal.FreeCoTaskMem(viPtr);
return(ret);
}
/// <summary>
/// Configure video media type
/// </summary>
/// <param name="mt"></param>
/// <returns></returns>
public bool ConfigVideo(UW.CSE.MDShow.MediaType mt)
{
_WMMediaType _mt = ConvertMediaType(mt);
return(ConfigVideo(_mt));
}
