/////////////////////////////////////////////////////////////////////
// Name: CreateASFSplitter
//
// Creates the ASF splitter.
//
// pContentInfo: Pointer to an initialized instance of the ASF
// content information object.
// ppSplitter: Receives a pointer to the ASF splitter.
/////////////////////////////////////////////////////////////////////
void CreateASFSplitter(IMFASFContentInfo pContentInfo, out IMFASFSplitter ppSplitter)
{
MFASFSplitterFlags f;
HResult hr;
hr = MFExtern.MFCreateASFSplitter(out ppSplitter);
MFError.ThrowExceptionForHR(hr);
hr = ppSplitter.Initialize(pContentInfo);
MFError.ThrowExceptionForHR(hr);
hr = ppSplitter.GetFlags(out f);
MFError.ThrowExceptionForHR(hr);
Console.WriteLine(string.Format("Splitter flags: {0}", f));
}
/////////////////////////////////////////////////////////////////////
// Name: CreateContentInfo
//
// Reads the ASF Header Object from a byte stream and returns a
// pointer to the ASF content information object.
//
// pStream: Pointer to the byte stream. The byte stream's
// current read position must be at the start of the
// ASF Header Object.
// ppContentInfo: Receives a pointer to the ASF content information
// object.
/////////////////////////////////////////////////////////////////////
void CreateContentInfo(
IMFByteStream pStream,
out IMFASFContentInfo ppContentInfo
)
{
HResult hr;
long cbHeader = 0;
const int MIN_ASF_HEADER_SIZE = 30;
IMFMediaBuffer pBuffer;
// Create the ASF content information object.
hr = MFExtern.MFCreateASFContentInfo(out ppContentInfo);
MFError.ThrowExceptionForHR(hr);
// Read the first 30 bytes to find the total header size.
ReadDataIntoBuffer(pStream, MIN_ASF_HEADER_SIZE, out pBuffer);
try
{
hr = ppContentInfo.GetHeaderSize(pBuffer, out cbHeader);
MFError.ThrowExceptionForHR(hr);
// Pass the first 30 bytes to the content information object.
hr = ppContentInfo.ParseHeader(pBuffer, 0);
MFError.ThrowExceptionForHR(hr);
}
finally
{
SafeRelease(pBuffer);
}
// Read the rest of the header and finish parsing the header.
ReadDataIntoBuffer(pStream, (int)(cbHeader - MIN_ASF_HEADER_SIZE), out pBuffer);
hr = ppContentInfo.ParseHeader(pBuffer, MIN_ASF_HEADER_SIZE);
MFError.ThrowExceptionForHR(hr);
}
public void DoSplit()
{
HResult hr;
bool bHasVideo = false;
IMFByteStream pStream = null;
IMFASFContentInfo pContentInfo = null;
IMFASFSplitter pSplitter = null;
Console.WriteLine(string.Format("Opening {0}.", m_sFileName));
try
{
// Start the Media Foundation platform.
hr = MFExtern.MFStartup(0x10070, MFStartup.Full);
MFError.ThrowExceptionForHR(hr);
// Open the file.
OpenFile(m_sFileName, out pStream);
// Read the ASF header.
CreateContentInfo(pStream, out pContentInfo);
// Create the ASF splitter.
CreateASFSplitter(pContentInfo, out pSplitter);
// Select the first video stream.
SelectVideoStream(pContentInfo, pSplitter, out bHasVideo);
// Parse the ASF file.
if (bHasVideo)
{
DisplayKeyFrames(pStream, pSplitter);
}
else
{
Console.WriteLine("No video stream.");
}
}
catch (Exception e)
{
hr = (HResult)Marshal.GetHRForException(e);
string s = MFError.GetErrorText(hr);
if (s == null)
{
s = e.Message;
}
else
{
s = string.Format("{0} ({1})", s, e.Message);
}
Console.WriteLine(string.Format("Exception 0x{0:x}: {1}", hr, s));
}
finally
{
// Clean up.
SafeRelease(pSplitter);
SafeRelease(pContentInfo);
SafeRelease(pStream);
}
// Shut down the Media Foundation platform.
hr = MFExtern.MFShutdown();
MFError.ThrowExceptionForHR(hr);
}
/////////////////////////////////////////////////////////////////////
// Name: SelectVideoStream
//
// Selects the first video stream for parsing with the ASF splitter.
//
// pContentInfo: Pointer to an initialized instance of the ASF
// content information object.
// pSplitter: Pointer to the ASF splitter.
// pbHasVideo: Receives TRUE if there is a video stream, or FALSE
// otherwise.
/////////////////////////////////////////////////////////////////////
void SelectVideoStream(
IMFASFContentInfo pContentInfo,
IMFASFSplitter pSplitter,
out bool pbHasVideo
)
{
int cStreams;
short wStreamID = 33;
short[] wStreamIDs = new short[1];
Guid streamType;
bool bFoundVideo = false;
HResult hr;
IMFASFProfile pProfile;
IMFASFStreamConfig pStream;
// Get the ASF profile from the content information object.
hr = pContentInfo.GetProfile(out pProfile);
MFError.ThrowExceptionForHR(hr);
try
{
// Loop through all of the streams in the profile.
hr = pProfile.GetStreamCount(out cStreams);
MFError.ThrowExceptionForHR(hr);
for (int i = 0; i < cStreams; i++)
{
// Get the stream type and stream identifier.
hr = pProfile.GetStream(i, out wStreamID, out pStream);
MFError.ThrowExceptionForHR(hr);
try
{
hr = pStream.GetStreamType(out streamType);
MFError.ThrowExceptionForHR(hr);
if (streamType == MFMediaType.Video)
{
bFoundVideo = true;
break;
}
}
finally
{
SafeRelease(pStream);
}
}
}
finally
{
SafeRelease(pProfile);
}
// Select the video stream, if found.
if (bFoundVideo)
{
// SelectStreams takes an array of stream identifiers.
wStreamIDs[0] = wStreamID;
hr = pSplitter.SelectStreams(wStreamIDs, 1);
MFError.ThrowExceptionForHR(hr);
}
pbHasVideo = bFoundVideo;
}
public static extern void MFCreateASFMediaSinkActivate(
[MarshalAs(UnmanagedType.LPWStr)] string pwszFileName,
IMFASFContentInfo pContentInfo,
out IMFActivate ppIActivate
);
public static extern void MFCreateASFContentInfo(
out IMFASFContentInfo ppIContentInfo);
/////////////////////////////////////////////////////////////////////
// Name: SelectVideoStream
//
// Selects the first video stream for parsing with the ASF splitter.
//
// pContentInfo: Pointer to an initialized instance of the ASF
// content information object.
// pSplitter: Pointer to the ASF splitter.
// pbHasVideo: Receives TRUE if there is a video stream, or FALSE
// otherwise.
/////////////////////////////////////////////////////////////////////
void SelectVideoStream(
IMFASFContentInfo pContentInfo,
IMFASFSplitter pSplitter,
out bool pbHasVideo
)
{
int cStreams;
short wStreamID = 33;
short[] wStreamIDs = new short[1];
Guid streamType;
bool bFoundVideo = false;
IMFASFProfile pProfile;
IMFASFStreamConfig pStream;
// Get the ASF profile from the content information object.
int hr = pContentInfo.GetProfile(out pProfile);
MFError.ThrowExceptionForHR(hr);
try
{
// Loop through all of the streams in the profile.
hr = pProfile.GetStreamCount(out cStreams);
MFError.ThrowExceptionForHR(hr);
for (int i = 0; i < cStreams; i++)
{
// Get the stream type and stream identifier.
hr = pProfile.GetStream(i, out wStreamID, out pStream);
MFError.ThrowExceptionForHR(hr);
try
{
hr = pStream.GetStreamType(out streamType);
MFError.ThrowExceptionForHR(hr);
if (streamType == MFMediaType.Video)
{
bFoundVideo = true;
break;
}
}
finally
{
SafeRelease(pStream);
}
}
}
finally
{
SafeRelease(pProfile);
}
// Select the video stream, if found.
if (bFoundVideo)
{
// SelectStreams takes an array of stream identifiers.
wStreamIDs[0] = wStreamID;
hr = pSplitter.SelectStreams(wStreamIDs, 1);
MFError.ThrowExceptionForHR(hr);
}
pbHasVideo = bFoundVideo;
}
void CreateIndexer(IMFASFContentInfo pContentInfo, out IMFASFIndexer ai)
{
MFAsfIndexerFlags f;
long l;
int i;
IMFMediaBuffer mb;
int hr;
hr = MFExtern.MFCreateASFIndexer(out ai);
MFError.ThrowExceptionForHR(hr);
hr = MFExtern.MFCreateMemoryBuffer(1000, out mb);
MFError.ThrowExceptionForHR(hr);
hr = ai.Initialize(pContentInfo);
MFError.ThrowExceptionForHR(hr);
hr = ai.GetIndexPosition(pContentInfo, out l);
MFError.ThrowExceptionForHR(hr);
hr = ai.GetFlags(out f);
MFError.ThrowExceptionForHR(hr);
hr = ai.SetFlags(f);
MFError.ThrowExceptionForHR(hr);
hr = ai.GetIndexByteStreamCount(out i);
MFError.ThrowExceptionForHR(hr);
hr = ai.GetCompletedIndex(mb, 0);
MFError.ThrowExceptionForHR(hr);
hr = ai.GetIndexWriteSpace(out l);
MFError.ThrowExceptionForHR(hr);
}
/////////////////////////////////////////////////////////////////////
// Name: CreateContentInfo
//
// Reads the ASF Header Object from a byte stream and returns a
// pointer to the ASF content information object.
//
// pStream: Pointer to the byte stream. The byte stream's
// current read position must be at the start of the
// ASF Header Object.
// ppContentInfo: Receives a pointer to the ASF content information
// object.
/////////////////////////////////////////////////////////////////////
void CreateContentInfo(
IMFByteStream pStream,
out IMFASFContentInfo ppContentInfo
)
{
long cbHeader = 0;
const int MIN_ASF_HEADER_SIZE = 30;
IMFMediaBuffer pBuffer;
// Create the ASF content information object.
int hr = MFExtern.MFCreateASFContentInfo(out ppContentInfo);
MFError.ThrowExceptionForHR(hr);
// Read the first 30 bytes to find the total header size.
ReadDataIntoBuffer(pStream, MIN_ASF_HEADER_SIZE, out pBuffer);
try
{
hr = ppContentInfo.GetHeaderSize(pBuffer, out cbHeader);
MFError.ThrowExceptionForHR(hr);
// Pass the first 30 bytes to the content information object.
hr = ppContentInfo.ParseHeader(pBuffer, 0);
MFError.ThrowExceptionForHR(hr);
}
finally
{
SafeRelease(pBuffer);
}
// Read the rest of the header and finish parsing the header.
ReadDataIntoBuffer(pStream, (int)(cbHeader - MIN_ASF_HEADER_SIZE), out pBuffer);
hr = ppContentInfo.ParseHeader(pBuffer, MIN_ASF_HEADER_SIZE);
MFError.ThrowExceptionForHR(hr);
}
/////////////////////////////////////////////////////////////////////
// Name: CreateASFSplitter
//
// Creates the ASF splitter.
//
// pContentInfo: Pointer to an initialized instance of the ASF
// content information object.
// ppSplitter: Receives a pointer to the ASF splitter.
/////////////////////////////////////////////////////////////////////
void CreateASFSplitter(IMFASFContentInfo pContentInfo, out IMFASFSplitter ppSplitter)
{
MFASFSplitterFlags f;
int hr = MFExtern.MFCreateASFSplitter(out ppSplitter);
MFError.ThrowExceptionForHR(hr);
hr = ppSplitter.Initialize(pContentInfo);
MFError.ThrowExceptionForHR(hr);
hr = ppSplitter.GetFlags(out f);
MFError.ThrowExceptionForHR(hr);
Console.WriteLine(string.Format("Splitter flags: {0}", f));
}