private static void UpdateAudioPart(IMediaDet mediaDet, MediaDescription mediaDesc)
{
int hr = 0;
AMMediaType mediaType = new AMMediaType();
hr = mediaDet.get_StreamMediaType(mediaType);
DsError.ThrowExceptionForHR(hr);
mediaDesc.audioSubType = mediaType.subType;
double streamLength;
hr = mediaDet.get_StreamLength(out streamLength);
DsError.ThrowExceptionForHR(hr);
mediaDesc.audioLength = TimeSpan.FromSeconds(streamLength);
if (mediaType.formatType == FormatType.WaveEx)
{
WaveFormatEx waveFormatEx = (WaveFormatEx)Marshal.PtrToStructure(mediaType.formatPtr, typeof(WaveFormatEx));
mediaDesc.channels = waveFormatEx.nChannels;
mediaDesc.samplesPerSec = ((float)waveFormatEx.nSamplesPerSec) / 1000;
mediaDesc.bitsPerSample = waveFormatEx.wBitsPerSample;
}
}
private static void UpdateVideoPart(IMediaDet mediaDet, MediaDescription mediaDesc)
{
int hr = 0;
AMMediaType mediaType = new AMMediaType();
hr = mediaDet.get_StreamMediaType(mediaType);
DsError.ThrowExceptionForHR(hr);
mediaDesc.videoSubType = mediaType.subType;
double streamLength;
hr = mediaDet.get_StreamLength(out streamLength);
DsError.ThrowExceptionForHR(hr);
mediaDesc.videoLength = TimeSpan.FromSeconds(streamLength);
if (mediaType.formatType == FormatType.VideoInfo)
{
VideoInfoHeader videoHeader = (VideoInfoHeader)Marshal.PtrToStructure(mediaType.formatPtr, typeof(VideoInfoHeader));
mediaDesc.resolution = new Size(videoHeader.BmiHeader.Width, videoHeader.BmiHeader.Height);
mediaDesc.bitsPerPixel = videoHeader.BmiHeader.BitCount;
mediaDesc.fourCC = FourCCToString(videoHeader.BmiHeader.Compression);
}
}
private void MainForm_DragDrop(object sender, DragEventArgs e)
{
// Retrieve the files droped into the form
string[] fileNames = (string[])e.Data.GetData("FileNameW");
// Get the description of this file
MediaDescription mediaDesc = MediaDetector.GetDescription(fileNames[0]);
// Display the returned description
propertyGrid1.SelectedObject = mediaDesc;
pictureBox1.Image = mediaDesc.Snapshot;
}
public static MediaDescription GetDescription(string fileName)
{
int hr = 0;
MediaDescription mediaDesc = new MediaDescription();
IMediaDet mediaDet = null;
try
{
// Create the DirectShow's MediaDet
mediaDet = (IMediaDet)new MediaDet();
hr = mediaDet.put_Filename(fileName);
if (hr < 0)
{
MessageBox.Show("This file is not supprted by MediaDet", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
DsError.ThrowExceptionForHR(hr);
}
mediaDesc.fileName = fileName;
int streamCount;
hr = mediaDet.get_OutputStreams(out streamCount);
DsError.ThrowExceptionForHR(hr);
for (int i = 0; i < streamCount; i++)
{
hr = mediaDet.put_CurrentStream(i);
DsError.ThrowExceptionForHR(hr);
Guid streamType;
hr = mediaDet.get_StreamType(out streamType);
DsError.ThrowExceptionForHR(hr);
if (streamType == MediaType.Audio)
UpdateAudioPart(mediaDet, mediaDesc);
else if (streamType == MediaType.Video)
UpdateVideoPart(mediaDet, mediaDesc);
else
continue;
}
if (mediaDesc.videoSubType != Guid.Empty)
mediaDesc.snapshot = GetSnapshot(mediaDet, mediaDesc.resolution.Width, mediaDesc.resolution.Height, mediaDesc.videoLength.TotalSeconds / 2);
}
finally
{
if (mediaDet != null)
Marshal.ReleaseComObject(mediaDet);
}
return mediaDesc;
}
private static void UpdateVideoPart(IMediaDet mediaDet, MediaDescription mediaDesc)
{
int hr = 0;
AMMediaType mediaType = new AMMediaType();
hr = mediaDet.get_StreamMediaType(mediaType);
DsError.ThrowExceptionForHR(hr);
mediaDesc.videoSubType = mediaType.subType;
double streamLength;
hr = mediaDet.get_StreamLength(out streamLength);
DsError.ThrowExceptionForHR(hr);
mediaDesc.videoLength = TimeSpan.FromSeconds(streamLength);
if (mediaType.formatType == FormatType.VideoInfo)
{
VideoInfoHeader videoHeader = (VideoInfoHeader)Marshal.PtrToStructure(mediaType.formatPtr, typeof(VideoInfoHeader));
mediaDesc.resolution = new Size(videoHeader.BmiHeader.Width, videoHeader.BmiHeader.Height);
mediaDesc.bitsPerPixel = videoHeader.BmiHeader.BitCount;
mediaDesc.fourCC = FourCCToString(videoHeader.BmiHeader.Compression);
}
}
private static void UpdateAudioPart(IMediaDet mediaDet, MediaDescription mediaDesc)
{
int hr = 0;
AMMediaType mediaType = new AMMediaType();
hr = mediaDet.get_StreamMediaType(mediaType);
DsError.ThrowExceptionForHR(hr);
mediaDesc.audioSubType = mediaType.subType;
double streamLength;
hr = mediaDet.get_StreamLength(out streamLength);
DsError.ThrowExceptionForHR(hr);
mediaDesc.audioLength = TimeSpan.FromSeconds(streamLength);
if (mediaType.formatType == FormatType.WaveEx)
{
WaveFormatEx waveFormatEx = (WaveFormatEx)Marshal.PtrToStructure(mediaType.formatPtr, typeof(WaveFormatEx));
mediaDesc.channels = waveFormatEx.nChannels;
mediaDesc.samplesPerSec = ((float)waveFormatEx.nSamplesPerSec) / 1000;
mediaDesc.bitsPerSample = waveFormatEx.wBitsPerSample;
}
}
public static MediaDescription GetDescription(string fileName)
{
int hr = 0;
MediaDescription mediaDesc = new MediaDescription();
IMediaDet mediaDet = null;
try
{
// Create the DirectShow's MediaDet
mediaDet = (IMediaDet) new MediaDet();
hr = mediaDet.put_Filename(fileName);
if (hr < 0)
{
MessageBox.Show("This file is not supprted by MediaDet", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
DsError.ThrowExceptionForHR(hr);
}
mediaDesc.fileName = fileName;
int streamCount;
hr = mediaDet.get_OutputStreams(out streamCount);
DsError.ThrowExceptionForHR(hr);
for (int i = 0; i < streamCount; i++)
{
hr = mediaDet.put_CurrentStream(i);
DsError.ThrowExceptionForHR(hr);
Guid streamType;
hr = mediaDet.get_StreamType(out streamType);
DsError.ThrowExceptionForHR(hr);
if (streamType == MediaType.Audio)
{
UpdateAudioPart(mediaDet, mediaDesc);
}
else if (streamType == MediaType.Video)
{
UpdateVideoPart(mediaDet, mediaDesc);
}
else
{
continue;
}
}
if (mediaDesc.videoSubType != Guid.Empty)
{
mediaDesc.snapshot = GetSnapshot(mediaDet, mediaDesc.resolution.Width, mediaDesc.resolution.Height, mediaDesc.videoLength.TotalSeconds / 2);
}
}
finally
{
if (mediaDet != null)
{
Marshal.ReleaseComObject(mediaDet);
}
}
return(mediaDesc);
}
