public AsfImageLoader(AsfFile file)
{
stream = new AsfStream(file, AsfStreamType.asfImage, 0);
WMUtils.WMCreateSyncReader(IntPtr.Zero, Rights.Playback, out syncReader);
syncReader.OpenStream(new AsfIStream(stream));
syncReader.SetReadStreamSamples((short)stream.Configuration.AsfVideoStreamId, false);
Width = stream.Configuration.ImageWidth;
Height = stream.Configuration.ImageHeight;
}
private void Config()
{
IWMSyncReader read;
m_Status = 0;
WMUtils.WMCreateSyncReader(IntPtr.Zero, Rights.Playback, out read);
m_read2 = read as IWMSyncReader2;
}
private void Config()
{
DoIndex(IndexerType.FrameNumbers);
IWMSyncReader read;
WMUtils.WMCreateSyncReader(IntPtr.Zero, Rights.Playback, out read);
m_read = read as IWMSyncReader2;
m_read.Open(sFileName);
}
/// <summary>
/// Get the bitmap image
/// </summary>
public Bitmap GetImage()
{
if (_sampleBitmap == null)
{
try
{
_asfMemoryStream = new AsfIStream(_asfStream);
IWMSyncReader syncReader;
WMUtils.WMCreateSyncReader(IntPtr.Zero, Rights.Playback, out syncReader);
syncReader.OpenStream(_asfMemoryStream);
short videoStreamNum = (short)_asfStream.Configuration.AsfVideoStreamId;
syncReader.SetReadStreamSamples(videoStreamNum, false);
long cnsSampleTime;
long cnsSampleDuration;
SampleFlag dwFlags;
INSSBuffer pSample;
int dwOutputNum = 0;
short dwStreamNum = 0;
bool isBitmapCreated = false;
while (!isBitmapCreated)
{
syncReader.GetNextSample(0, out pSample, out cnsSampleTime, out cnsSampleDuration, out dwFlags, out dwOutputNum, out dwStreamNum);
if ((dwFlags & SampleFlag.CleanPoint) == SampleFlag.CleanPoint)
{
//Get the bitmap from the frame
IntPtr pBuffer;
int bufferLength;
pSample.GetBufferAndLength(out pBuffer, out bufferLength);
byte[] sampleData = new byte[bufferLength];
Marshal.Copy(pBuffer, sampleData, 0, bufferLength);
_sampleBitmap = CopyDataToBitmap(sampleData, _asfStream.Configuration.ImageWidth, _asfStream.Configuration.ImageHeight);
isBitmapCreated = true;
}
Marshal.FinalReleaseComObject(pSample);
}
Marshal.FinalReleaseComObject(syncReader);
}
catch (Exception) //catch and ignore, returned bitmap will be null
{
}
finally
{
Dispose();
}
}
return(_sampleBitmap);
}
private void Config()
{
IWMSyncReader reader;
WMUtils.WMCreateSyncReader(IntPtr.Zero, Rights.Playback, out reader);
readerTimecode = (IWMReaderTimecode)reader;
reader.Open(@"C:\so_lesson3c.wmv");
int outputs = -1;
reader.GetOutputCount(out outputs);
Debug.Assert(outputs > 0);
}
private void Config()
{
IWMIndexer pIndex;
WMUtils.WMCreateIndexer(out pIndex);
IWMIndexer2 pIndex2 = pIndex as IWMIndexer2;
pIndex2.Configure(0, IndexerType.FrameNumbers, null, null);
pIndex2.StartIndexing(sFileName, this, IntPtr.Zero);
while (!m_IndexComplete)
{
System.Threading.Thread.Sleep(0);
}
WMUtils.WMCreateSyncReader(IntPtr.Zero, Rights.Playback, out m_read);
}
/// <summary>
/// Get audio sample bytes from the underlying stream
/// </summary>
public byte[] GetSampleBytes(int maxSampleCount)
{
_asfMemoryStream = new AsfIStream(_asfStream);
WMUtils.WMCreateSyncReader(IntPtr.Zero, Rights.Playback, out _syncReader);
_syncReader.OpenStream(_asfMemoryStream);
short audioStreamNum = (short)_asfStream.Configuration.AsfAudioStreamId;
_syncReader.SetReadStreamSamples(audioStreamNum, false);
long cnsSampleTime;
long cnsSampleDuration;
SampleFlag dwFlags;
INSSBuffer pSample;
int dwOutputNum = 0;
short dwStreamNum = 0;
List <byte> sampleList = new List <byte>();
long samplesRead = 0;
int sampleSize = _asfStream.Configuration.AudioBitsPerSample / 8;
try
{
while (samplesRead < maxSampleCount)
{
_syncReader.GetNextSample(audioStreamNum, out pSample, out cnsSampleTime, out cnsSampleDuration, out dwFlags, out dwOutputNum, out dwStreamNum);
IntPtr pBuffer;
int bufferLength;
pSample.GetBufferAndLength(out pBuffer, out bufferLength);
byte[] sampleData = new byte[bufferLength];
Marshal.Copy(pBuffer, sampleData, 0, bufferLength);
Marshal.FinalReleaseComObject(pSample);
samplesRead += sampleData.Length / (sampleSize * _asfStream.Configuration.AudioChannels);
sampleList.AddRange(sampleData);
}
}
catch (COMException) // no more samples or corrupted content
{
}
return(sampleList.Take(maxSampleCount).ToArray());
}
/// <summary>
/// Write the PCM audio data to a stream
/// </summary>
public void WriteTo(Stream stream)
{
_asfMemoryStream = new AsfIStream(_asfStream);
WMUtils.WMCreateSyncReader(IntPtr.Zero, Rights.Playback, out _syncReader);
_syncReader.OpenStream(_asfMemoryStream);
short audioStreamNum = (short)_asfStream.Configuration.AsfAudioStreamId;
_syncReader.SetReadStreamSamples(audioStreamNum, false);
long cnsSampleTime;
long cnsSampleDuration;
SampleFlag dwFlags;
INSSBuffer pSample;
int dwOutputNum = 0;
short dwStreamNum = 0;
try
{
while (true)
{
_syncReader.GetNextSample(audioStreamNum, out pSample, out cnsSampleTime, out cnsSampleDuration, out dwFlags, out dwOutputNum, out dwStreamNum);
IntPtr pBuffer;
int bufferLength;
pSample.GetBufferAndLength(out pBuffer, out bufferLength);
byte[] sampleData = new byte[bufferLength];
Marshal.Copy(pBuffer, sampleData, 0, bufferLength);
Marshal.FinalReleaseComObject(pSample);
stream.Write(sampleData, 0, sampleData.Length);
}
}
catch (COMException) // no more samples or corrupted content
{
}
}
public AudioDecoder(string path, Stream IO)
{
m_path = path;
isValid(path);
bool pfIsProtected;
WMUtils.WMIsContentProtected(path, out pfIsProtected);
if (pfIsProtected)
{
throw new Exception("DRM present");
}
WMUtils.WMCreateSyncReader(IntPtr.Zero, Rights.None, out m_syncReader);
if (path == null)
{
m_IO = IO != null ? IO : new FileStream(path, FileMode.Open, FileAccess.Read, FileShare.Read, 0x10000);
m_streamWrapper = new StreamWrapper(m_IO);
m_syncReader.OpenStream(m_streamWrapper);
}
else
{
m_syncReader.Open(path);
}
var pProfile = (m_syncReader as IWMProfile);
int dwStreamCount;
pProfile.GetStreamCount(out dwStreamCount);
for (int dwIndex = 0; dwIndex < dwStreamCount; dwIndex++)
{
IWMStreamConfig pConfig = null;
pProfile.GetStream(dwIndex, out pConfig);
try
{
Guid guid;
pConfig.GetStreamType(out guid);
if (MediaType.Audio != guid)
{
continue;
}
short wStreamNum;
pConfig.GetStreamNumber(out wStreamNum);
int dwBitrate = -1;
pConfig.GetBitrate(out dwBitrate);
var pIWMMediaProps = pConfig as IWMMediaProps;
int cbType = 0;
pIWMMediaProps.GetMediaType(null, ref cbType);
var pMediaType = new AMMediaType();
pMediaType.formatSize = cbType;
pIWMMediaProps.GetMediaType(pMediaType, ref cbType);
if (pMediaType.formatType != FormatType.WaveEx)
{
continue;
}
if (pMediaType.subType != MediaSubType.WMAudio_Lossless)
{
continue;
}
m_wStreamNum = wStreamNum;
pcm = WaveFormatExtensible.FromMediaType(pMediaType).GetConfig();
break;
}
finally
{
Marshal.ReleaseComObject(pConfig);
}
}
if (m_wStreamNum == -1)
{
throw new Exception("No WMA lossless streams found");
}
m_syncReader.SetReadStreamSamples(m_wStreamNum, false);
bool pfCompressed;
m_syncReader.GetReadStreamSamples(m_wStreamNum, out pfCompressed);
if (pfCompressed)
{
throw new Exception("doesn't decompress");
}
m_syncReader.GetOutputNumberForStream(m_wStreamNum, out m_dwAudioOutputNum);
IWMOutputMediaProps pProps;
m_syncReader.GetOutputProps(m_dwAudioOutputNum, out pProps);
try
{
StringBuilder sName = null;
AMMediaType pMediaType = null;
int cbType = 0;
cbType = 0;
pMediaType = null;
pProps.GetMediaType(pMediaType, ref cbType);
// Get the name of the output we'll be using
sName = null;
short iName = 0;
pProps.GetConnectionName(sName, ref iName);
sName = new StringBuilder(iName);
pProps.GetConnectionName(sName, ref iName);
if (pcm.ChannelCount > 2)
{
m_syncReader.SetOutputSetting(m_dwAudioOutputNum, Constants.g_wszEnableDiscreteOutput, AttrDataType.BOOL, new byte[] { 1, 0, 0, 0 }, 4);
m_syncReader.SetOutputSetting(m_dwAudioOutputNum, Constants.g_wszSpeakerConfig, AttrDataType.DWORD, new byte[] { 0, 0, 0, 0 }, 4);
}
pMediaType = new AMMediaType();
pMediaType.formatSize = cbType - Marshal.SizeOf(typeof(AMMediaType));
//
// Get the value for MediaType
//
pProps.GetMediaType(pMediaType, ref cbType);
try
{
if (MediaType.Audio != pMediaType.majorType)
{
throw new Exception("not Audio");
}
if (FormatType.WaveEx != pMediaType.formatType)
{
throw new Exception("not WaveEx");
}
var wfe = new WaveFormatExtensible(pcm);
Marshal.FreeCoTaskMem(pMediaType.formatPtr);
pMediaType.formatPtr = IntPtr.Zero;
pMediaType.formatSize = 0;
pMediaType.formatPtr = Marshal.AllocCoTaskMem(Marshal.SizeOf(wfe));
pMediaType.formatSize = Marshal.SizeOf(wfe);
Marshal.StructureToPtr(wfe, pMediaType.formatPtr, false);
pProps.SetMediaType(pMediaType);
m_syncReader.SetOutputProps(m_dwAudioOutputNum, pProps);
}
finally
{
WMUtils.FreeWMMediaType(pMediaType);
}
}
finally
{
Marshal.ReleaseComObject(pProps);
}
//try
//{
// AttrDataType wmtType;
// short cbLength = 0;
// short wAnyStream = 0;
// var pHeaderInfo = m_syncReader as IWMHeaderInfo;
// pHeaderInfo.GetAttributeByName(ref wAnyStream, Constants.g_wszWMDuration, out wmtType, null, ref cbLength);
// var pbValue = new byte[cbLength];
// pHeaderInfo.GetAttributeByName(ref wAnyStream, Constants.g_wszWMDuration, out wmtType, pbValue, ref cbLength);
// var m_cnsFileDuration = BitConverter.ToInt64(pbValue, 0);
// _sampleCount = m_cnsFileDuration * m_pWfx.nSamplesPerSec / 10000000;
// // NOT ACCURATE ENOUGH (~1ms precision observed)
//}
//catch (COMException)
//{
//}
//try
//{
// var pHeaderInfo = m_syncReader as IWMHeaderInfo2;
// int nCodec;
// pHeaderInfo.GetCodecInfoCount(out nCodec);
// for (int wIndex = 0; wIndex < nCodec; wIndex++)
// {
// CodecInfoType enumCodecType;
// short cchName = 0;
// short cchDescription = 0;
// short cbCodecInfo = 0;
// pHeaderInfo.GetCodecInfo(wIndex, ref cchName, null,
// ref cchDescription, null, out enumCodecType,
// ref cbCodecInfo, null);
// var pwszName = new StringBuilder(cchName);
// var pwszDescription = new StringBuilder(cchDescription);
// var pbCodecInfo = new byte[cbCodecInfo];
// pHeaderInfo.GetCodecInfo(wIndex, ref cchName, pwszName,
// ref cchDescription, pwszDescription, out enumCodecType,
// ref cbCodecInfo, pbCodecInfo);
// if (enumCodecType == CodecInfoType.Audio)
// {
// // pbCodecInfo = {99,1} ??/
// }
// }
//}
//catch (COMException)
//{
//}
//int cbMax;
//m_syncReader.GetMaxOutputSampleSize(m_dwAudioOutputNum, out cbMax);
}
public IEnumerable <AudioSample> GetSamples(int maxSampleCount = 0)
{
_asfMemoryStream = new AsfIStream(_asfStream);
WMUtils.WMCreateSyncReader(IntPtr.Zero, Rights.Playback, out _syncReader);
_syncReader.OpenStream(_asfMemoryStream);
short audioStreamNum = (short)_asfStream.Configuration.AsfAudioStreamId;
_syncReader.SetReadStreamSamples(audioStreamNum, false);
long cnsSampleTime;
long cnsSampleDuration;
SampleFlag dwFlags;
INSSBuffer pSample;
int dwOutputNum = 0;
short dwStreamNum = 0;
int totalSampleCount = 0;
while (true)
{
if (_sampleBuffer.Count > 0)
{
yield return(_sampleBuffer.Dequeue());
}
else
{
if (totalSampleCount >= maxSampleCount)
{
yield break;
}
try
{
_syncReader.GetNextSample(audioStreamNum, out pSample, out cnsSampleTime, out cnsSampleDuration, out dwFlags, out dwOutputNum, out dwStreamNum);
IntPtr pBuffer;
int bufferLength;
pSample.GetBufferAndLength(out pBuffer, out bufferLength);
byte[] sampleData = new byte[bufferLength];
Marshal.Copy(pBuffer, sampleData, 0, bufferLength);
Marshal.FinalReleaseComObject(pSample);
float sample = 0;
float[] samples = new float[_asfStream.Configuration.AudioChannels];
int fullSampleSize = _asfStream.Configuration.AudioChannels * (_asfStream.Configuration.AudioBitsPerSample / 8);
int takeSamplesPerSec = 10000;
int sampleStep = (int)(fullSampleSize * (_asfStream.Configuration.AudioSampleRate / takeSamplesPerSec));
for (int sampleOffset = 0; sampleOffset < sampleData.Length; sampleOffset += sampleStep)
{
for (int i = 0; i < _asfStream.Configuration.AudioChannels; i++)
{
if (_asfStream.Configuration.AudioBitsPerSample == 16)
{
sample = BitConverter.ToInt16(sampleData, sampleOffset + i * 2);
sample = sample / Int16.MaxValue;
}
else if (_asfStream.Configuration.AudioBitsPerSample == 32)
{
sample = BitConverter.ToInt32(sampleData, sampleOffset + i * 4);
sample = sample / Int32.MaxValue;
}
samples[i] = sample;
}
totalSampleCount++;
if (maxSampleCount == 0 || totalSampleCount <= maxSampleCount)
{
_sampleBuffer.Enqueue(new AudioSample(samples));
}
else
{
continue;
}
}
}
catch (COMException) // no more samples or corrupted content
{
totalSampleCount = maxSampleCount;
}
}
}
}
