private void TestFormat()
{
int i;
IWMOutputMediaProps iProp;
m_read.GetOutputFormatCount(1, out i);
Debug.Assert(i > 0);
m_read.GetOutputFormat(1, 1, out iProp);
Debug.Assert(iProp != null);
}
private static int[] GetPCMOutputNumbers(IWMSyncReader Reader, uint OutputNumber)
{
var result = new List <int>();
uint FormatCount = 0;
Reader.GetOutputFormatCount(OutputNumber, out FormatCount);
int BufferSize = Marshal.SizeOf(typeof(WM_MEDIA_TYPE)) + Marshal.SizeOf(typeof(WaveFormat));
IntPtr buffer = Marshal.AllocCoTaskMem(BufferSize);
try
{
for (int i = 0; i < FormatCount; i++)
{
IWMOutputMediaProps Props = null;
int size = 0;
WM_MEDIA_TYPE mt;
Reader.GetOutputFormat(OutputNumber, (uint)i, out Props);
Props.GetMediaType(IntPtr.Zero, ref size);
if (size > BufferSize)
{
BufferSize = size;
Marshal.FreeCoTaskMem(buffer);
buffer = Marshal.AllocCoTaskMem(BufferSize);
}
Props.GetMediaType(buffer, ref size);
mt = (WM_MEDIA_TYPE)Marshal.PtrToStructure(buffer, typeof(WM_MEDIA_TYPE));
if ((mt.majortype == MediaTypes.WMMEDIATYPE_Audio) &&
(mt.subtype == MediaTypes.WMMEDIASUBTYPE_PCM) &&
(mt.formattype == MediaTypes.WMFORMAT_WaveFormatEx) &&
(mt.cbFormat >= WAVE_FORMAT_EX_SIZE))
{
result.Add(i);
}
}
}
finally
{
Marshal.FreeCoTaskMem(buffer);
}
return(result.ToArray());
}
private static int[] GetPCMOutputNumbers(IWMSyncReader Reader, uint OutputNumber)
{
var result = new List<int>();
uint FormatCount = 0;
Reader.GetOutputFormatCount(OutputNumber, out FormatCount);
int BufferSize = Marshal.SizeOf(typeof(WM_MEDIA_TYPE)) + Marshal.SizeOf(typeof(WaveFormat));
IntPtr buffer = Marshal.AllocCoTaskMem(BufferSize);
try
{
for (int i = 0; i < FormatCount; i++)
{
IWMOutputMediaProps Props = null;
int size = 0;
WM_MEDIA_TYPE mt;
Reader.GetOutputFormat(OutputNumber, (uint)i, out Props);
Props.GetMediaType(IntPtr.Zero, ref size);
if (size > BufferSize)
{
BufferSize = size;
Marshal.FreeCoTaskMem(buffer);
buffer = Marshal.AllocCoTaskMem(BufferSize);
}
Props.GetMediaType(buffer, ref size);
mt = (WM_MEDIA_TYPE)Marshal.PtrToStructure(buffer, typeof(WM_MEDIA_TYPE));
if ((mt.majortype == MediaTypes.WMMEDIATYPE_Audio) &&
(mt.subtype == MediaTypes.WMMEDIASUBTYPE_PCM) &&
(mt.formattype == MediaTypes.WMFORMAT_WaveFormatEx) &&
(mt.cbFormat >= WAVE_FORMAT_EX_SIZE))
{
result.Add(i);
}
}
}
finally
{
Marshal.FreeCoTaskMem(buffer);
}
return result.ToArray();
}
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);
}