Code:
/ Dotnetfx_Vista_SP2 / Dotnetfx_Vista_SP2 / 8.0.50727.4016 / WIN_WINDOWS / lh_tools_devdiv_wpf / Windows / wcp / Speech / Src / Result / RecognizedAudio.cs / 1 / RecognizedAudio.cs
//------------------------------------------------------------------
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
//-----------------------------------------------------------------
using System;
using System.IO;
using System.Diagnostics;
using System.Diagnostics.CodeAnalysis;
using System.Speech.AudioFormat;
using System.Speech.Internal;
#pragma warning disable 1634, 1691 // Allows suppression of certain PreSharp messages.
namespace System.Speech.Recognition
{
/// TODOC <_include file='doc\RecognitionResult.uex' path='docs/doc[@for="RecognizedAudio"]/*' />
[Serializable]
public class RecognizedAudio
{
internal RecognizedAudio(byte[] rawAudioData, SpeechAudioFormatInfo audioFormat, DateTime startTime, TimeSpan audioPosition, TimeSpan audioDuration)
{
_audioFormat = audioFormat;
_startTime = startTime;
_audioPosition = audioPosition;
_audioDuration = audioDuration;
_rawAudioData = rawAudioData;
}
#if !SPEECHSERVER
/// TODOC <_include file='doc\RecognitionResult.uex' path='docs/doc[@for="RecognizedAudio.Format"]/*' />
public SpeechAudioFormatInfo Format
{
get { return _audioFormat; }
}
#endif
// Chronological "wall-clock" time the user started speaking the result at. This is useful for latency calculations etc.
/// TODOC <_include file='doc\RecognitionResult.uex' path='docs/doc[@for="RecognizedAudio.StartTime"]/*' />
public DateTime StartTime
{
get { return _startTime; }
}
// Position in the audio stream this audio starts at.
// Note: the stream starts at zero when the engine first starts processing audio.
/// TODOC <_include file='doc\RecognitionResult.uex' path='docs/doc[@for="RecognizedAudio.AudioPosition"]/*' />
public TimeSpan AudioPosition
{
get { return _audioPosition; }
}
// Length of this audio fragment
/// TODOC <_include file='doc\RecognitionResult.uex' path='docs/doc[@for="RecognizedAudio.Duration"]/*' />
public TimeSpan Duration
{
get { return _audioDuration; }
}
// Different ways to store the audio, either as a binary data stream or as a wave file.
/// TODOC <_include file='doc\RecognitionResult.uex' path='docs/doc[@for="RecognizedAudio.WriteAudio1"]/*' />
public void WriteToWaveStream (Stream outputStream)
{
Helpers.ThrowIfNull (outputStream, "outputStream");
using (StreamMarshaler sm = new StreamMarshaler (outputStream))
{
WriteWaveHeader (sm);
}
// now write the raw data
outputStream.Write (_rawAudioData, 0, _rawAudioData.Length);
outputStream.Flush ();
}
// Different ways to store the audio, either as a binary data stream or as a wave file.
/// TODOC <_include file='doc\RecognitionResult.uex' path='docs/doc[@for="RecognizedAudio.WriteAudio1"]/*' />
public void WriteToAudioStream (Stream outputStream)
{
Helpers.ThrowIfNull (outputStream, "outputStream");
// now write the raw data
outputStream.Write (_rawAudioData, 0, _rawAudioData.Length);
outputStream.Flush ();
}
// Get another audio object from this one representing a range of audio.
/// TODOC <_include file='doc\RecognitionResult.uex' path='docs/doc[@for="RecognizedAudio.GetRange"]/*' />
public RecognizedAudio GetRange (TimeSpan audioPosition, TimeSpan duration)
{
if (audioPosition.Ticks < 0)
{
throw new ArgumentOutOfRangeException ("audioPosition", SR.Get (SRID.NegativeTimesNotSupported));
}
if (duration.Ticks < 0)
{
throw new ArgumentOutOfRangeException ("duration", SR.Get (SRID.NegativeTimesNotSupported));
}
if (audioPosition > _audioDuration)
{
throw new ArgumentOutOfRangeException ("audioPosition");
}
if (duration > audioPosition + _audioDuration)
{
throw new ArgumentOutOfRangeException ("duration");
}
// Get the position and length in bytes offset and btyes length.
int startPosition = (int) ((_audioFormat.BitsPerSample * _audioFormat.SamplesPerSecond * audioPosition.Ticks) / (TimeSpan.TicksPerSecond * 8));
int length = (int) ((_audioFormat.BitsPerSample * _audioFormat.SamplesPerSecond * duration.Ticks) / (TimeSpan.TicksPerSecond * 8));
if (startPosition + length > _rawAudioData.Length)
{
length = _rawAudioData.Length - startPosition;
}
// Extract the data from the original stream
byte [] audioBytes = new byte [length];
Array.Copy (_rawAudioData, startPosition, audioBytes, 0, length);
return new RecognizedAudio (audioBytes, _audioFormat, _startTime + audioPosition, audioPosition, duration);
}
//*******************************************************************
//
// Private Fields
//
//*******************************************************************
#region Private Methods
private void WriteWaveHeader (StreamMarshaler sm)
{
char [] riff = new char [4] { 'R', 'I', 'F', 'F' };
byte [] formatSpecificData = _audioFormat.FormatSpecificData ();
sm.WriteArray (riff, riff.Length);
sm.WriteStream ((uint) (_rawAudioData.Length + 38 + formatSpecificData.Length)); // Must be four bytes
char [] wave = new char [4] { 'W', 'A', 'V', 'E' };
sm.WriteArray (wave, wave.Length);
char [] fmt = new char [4] { 'f', 'm', 't', ' ' };
sm.WriteArray (fmt, fmt.Length);
sm.WriteStream (18 + formatSpecificData.Length);
sm.WriteStream ((UInt16) _audioFormat.EncodingFormat);
sm.WriteStream ((UInt16) _audioFormat.ChannelCount);
sm.WriteStream (_audioFormat.SamplesPerSecond);
sm.WriteStream (_audioFormat.AverageBytesPerSecond);
sm.WriteStream ((UInt16) _audioFormat.BlockAlign);
sm.WriteStream ((UInt16) _audioFormat.BitsPerSample);
sm.WriteStream ((UInt16) formatSpecificData.Length);
// write codec specific data
if (formatSpecificData.Length > 0)
{
sm.WriteStream (formatSpecificData);
}
char [] data = new char [4] { 'd', 'a', 't', 'a' };
sm.WriteArray (data, data.Length);
sm.WriteStream (_rawAudioData.Length);
}
#if SPEECHSERVER
#pragma warning disable 56518 // The Binary reader cannot be disposed or it would close the underlying stream
[SuppressMessage("Microsoft.Reliability", "CA2000:DisposeObjectsBeforeLosingScope")]
internal RecognizedAudio RemoveMetaData()
{
// Check format:
if ((int)_audioFormat.EncodingFormat == 0x8000 - (int)EncodingFormat.Pcm ||
(int)_audioFormat.EncodingFormat == 0x8000 - (int)EncodingFormat.ULaw ||
(int)_audioFormat.EncodingFormat == 0x8000 - (int)EncodingFormat.ALaw)
{
// We have metadata so remove it:
// Read metadata info from the format:
byte[] formatSpecificData = _audioFormat.FormatSpecificData();
if (formatSpecificData.Length < 4)
{
throw new FormatException(SR.Get(SRID.ExtraDataNotPresent));
}
ushort metaDataSize;
using (MemoryStream metaDataStream = new MemoryStream(formatSpecificData))
{
BinaryReader br = new BinaryReader(metaDataStream);
br.ReadUInt16(); // Is metadata present - not used here.
metaDataSize = br.ReadUInt16();
}
int bytesPerSample = _audioFormat.BitsPerSample / 8;
if (bytesPerSample < 1 || bytesPerSample > 2)
{
throw new FormatException(SR.Get(SRID.BitsPerSampleInvalid));
}
// Calculate size of data part of block. As well as the metadata there are 6 bytes of overhead {signature, number of samples and reserved}.
int sampleBlockSize = (int)_audioFormat.BlockAlign - metaDataSize - 6;
if (sampleBlockSize < 0)
{
throw new FormatException(SR.Get(SRID.DataBlockSizeInvalid));
}
// Check we have a whole number of blocks:
if (_rawAudioData.Length % _audioFormat.BlockAlign != 0)
{
throw new FormatException(SR.Get(SRID.NotWholeNumberBlocks));
}
// Actually copy the audio data to a new array:
byte[] newAudioData = ProcessMetaDataBlocks(metaDataSize, bytesPerSample, sampleBlockSize);
// Make new format:
EncodingFormat newEncodingFormat = (EncodingFormat)(-((int)_audioFormat.EncodingFormat - 0x8000));
int newAverageBytesPerSecond = (int)(((long)_audioFormat.AverageBytesPerSecond * sampleBlockSize) / _audioFormat.BlockAlign);
short newBlockAlign = (short)(bytesPerSample * _audioFormat.ChannelCount);
SpeechAudioFormatInfo newAudioFormat = new SpeechAudioFormatInfo(newEncodingFormat, _audioFormat.SamplesPerSecond, _audioFormat.BitsPerSample, _audioFormat.ChannelCount, newAverageBytesPerSecond, newBlockAlign, null);
// Make new RecognizedAudio {copying start, duration etc}:
return new RecognizedAudio(newAudioData, newAudioFormat, _startTime, _audioPosition, _audioDuration);
}
else
{
// No metadata - just return.
return this;
}
}
// Copy
private byte[] ProcessMetaDataBlocks(ushort metaDataSize, int bytesPerSample, int sampleBlockSize)
{
// Make new array: {this may be slightly too big if there are some empty packets - we resize later}
int numberOfBlocks = _rawAudioData.Length / _audioFormat.BlockAlign;
byte[] newAudioData = new byte[numberOfBlocks * sampleBlockSize];
// Copy new bytes: {removing metadata and zero parts of data}
int numberAudioBytes = 0;
using (MemoryStream dataStream = new MemoryStream(_rawAudioData))
{
BinaryReader br = new BinaryReader(dataStream);
for (int i = 0; i < numberOfBlocks; i++)
{
ushort signature = br.ReadUInt16();
ushort sampleCount = br.ReadUInt16();
br.ReadBytes(metaDataSize); // Meta data itself
br.ReadUInt16(); // Reserved value - not used here.
int bytesToCopy = sampleCount * bytesPerSample;
if (signature != (ushort)_audioFormat.EncodingFormat)
{
throw new FormatException(SR.Get(SRID.BlockSignatureInvalid));
}
if (bytesToCopy > sampleBlockSize)
{
throw new FormatException(SR.Get(SRID.NumberOfSamplesInvalid));
}
// Copy the required number of samles across:
int curPosition = (int)dataStream.Position;
int endPosition = curPosition + bytesToCopy;
for (; curPosition < endPosition; curPosition++, numberAudioBytes++)
{
newAudioData[numberAudioBytes] = _rawAudioData[curPosition];
}
dataStream.Position += sampleBlockSize;
}
Debug.Assert(dataStream.Position == _rawAudioData.Length);
}
// Resize if necessary:
Debug.Assert(numberAudioBytes <= newAudioData.Length);
if (numberAudioBytes < newAudioData.Length)
{
// Array.Resize(ref newAudioData, numberAudioBytes);
byte [] tempAudioData = new byte[numberAudioBytes];
Array.Copy(tempAudioData, newAudioData, numberAudioBytes);
newAudioData = tempAudioData;
}
return newAudioData;
}
#pragma warning restore 56518 // The Binary reader cannot be disposed or it would close the underlying stream
#endif
#endregion
//********************************************************************
//
// Private Fields
//
//*******************************************************************
#region Private Fields
DateTime _startTime;
TimeSpan _audioPosition;
TimeSpan _audioDuration;
SpeechAudioFormatInfo _audioFormat;
byte [] _rawAudioData;
#endregion
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
//------------------------------------------------------------------
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
//-----------------------------------------------------------------
using System;
using System.IO;
using System.Diagnostics;
using System.Diagnostics.CodeAnalysis;
using System.Speech.AudioFormat;
using System.Speech.Internal;
#pragma warning disable 1634, 1691 // Allows suppression of certain PreSharp messages.
namespace System.Speech.Recognition
{
/// TODOC <_include file='doc\RecognitionResult.uex' path='docs/doc[@for="RecognizedAudio"]/*' />
[Serializable]
public class RecognizedAudio
{
internal RecognizedAudio(byte[] rawAudioData, SpeechAudioFormatInfo audioFormat, DateTime startTime, TimeSpan audioPosition, TimeSpan audioDuration)
{
_audioFormat = audioFormat;
_startTime = startTime;
_audioPosition = audioPosition;
_audioDuration = audioDuration;
_rawAudioData = rawAudioData;
}
#if !SPEECHSERVER
/// TODOC <_include file='doc\RecognitionResult.uex' path='docs/doc[@for="RecognizedAudio.Format"]/*' />
public SpeechAudioFormatInfo Format
{
get { return _audioFormat; }
}
#endif
// Chronological "wall-clock" time the user started speaking the result at. This is useful for latency calculations etc.
/// TODOC <_include file='doc\RecognitionResult.uex' path='docs/doc[@for="RecognizedAudio.StartTime"]/*' />
public DateTime StartTime
{
get { return _startTime; }
}
// Position in the audio stream this audio starts at.
// Note: the stream starts at zero when the engine first starts processing audio.
/// TODOC <_include file='doc\RecognitionResult.uex' path='docs/doc[@for="RecognizedAudio.AudioPosition"]/*' />
public TimeSpan AudioPosition
{
get { return _audioPosition; }
}
// Length of this audio fragment
/// TODOC <_include file='doc\RecognitionResult.uex' path='docs/doc[@for="RecognizedAudio.Duration"]/*' />
public TimeSpan Duration
{
get { return _audioDuration; }
}
// Different ways to store the audio, either as a binary data stream or as a wave file.
/// TODOC <_include file='doc\RecognitionResult.uex' path='docs/doc[@for="RecognizedAudio.WriteAudio1"]/*' />
public void WriteToWaveStream (Stream outputStream)
{
Helpers.ThrowIfNull (outputStream, "outputStream");
using (StreamMarshaler sm = new StreamMarshaler (outputStream))
{
WriteWaveHeader (sm);
}
// now write the raw data
outputStream.Write (_rawAudioData, 0, _rawAudioData.Length);
outputStream.Flush ();
}
// Different ways to store the audio, either as a binary data stream or as a wave file.
/// TODOC <_include file='doc\RecognitionResult.uex' path='docs/doc[@for="RecognizedAudio.WriteAudio1"]/*' />
public void WriteToAudioStream (Stream outputStream)
{
Helpers.ThrowIfNull (outputStream, "outputStream");
// now write the raw data
outputStream.Write (_rawAudioData, 0, _rawAudioData.Length);
outputStream.Flush ();
}
// Get another audio object from this one representing a range of audio.
/// TODOC <_include file='doc\RecognitionResult.uex' path='docs/doc[@for="RecognizedAudio.GetRange"]/*' />
public RecognizedAudio GetRange (TimeSpan audioPosition, TimeSpan duration)
{
if (audioPosition.Ticks < 0)
{
throw new ArgumentOutOfRangeException ("audioPosition", SR.Get (SRID.NegativeTimesNotSupported));
}
if (duration.Ticks < 0)
{
throw new ArgumentOutOfRangeException ("duration", SR.Get (SRID.NegativeTimesNotSupported));
}
if (audioPosition > _audioDuration)
{
throw new ArgumentOutOfRangeException ("audioPosition");
}
if (duration > audioPosition + _audioDuration)
{
throw new ArgumentOutOfRangeException ("duration");
}
// Get the position and length in bytes offset and btyes length.
int startPosition = (int) ((_audioFormat.BitsPerSample * _audioFormat.SamplesPerSecond * audioPosition.Ticks) / (TimeSpan.TicksPerSecond * 8));
int length = (int) ((_audioFormat.BitsPerSample * _audioFormat.SamplesPerSecond * duration.Ticks) / (TimeSpan.TicksPerSecond * 8));
if (startPosition + length > _rawAudioData.Length)
{
length = _rawAudioData.Length - startPosition;
}
// Extract the data from the original stream
byte [] audioBytes = new byte [length];
Array.Copy (_rawAudioData, startPosition, audioBytes, 0, length);
return new RecognizedAudio (audioBytes, _audioFormat, _startTime + audioPosition, audioPosition, duration);
}
//*******************************************************************
//
// Private Fields
//
//*******************************************************************
#region Private Methods
private void WriteWaveHeader (StreamMarshaler sm)
{
char [] riff = new char [4] { 'R', 'I', 'F', 'F' };
byte [] formatSpecificData = _audioFormat.FormatSpecificData ();
sm.WriteArray (riff, riff.Length);
sm.WriteStream ((uint) (_rawAudioData.Length + 38 + formatSpecificData.Length)); // Must be four bytes
char [] wave = new char [4] { 'W', 'A', 'V', 'E' };
sm.WriteArray (wave, wave.Length);
char [] fmt = new char [4] { 'f', 'm', 't', ' ' };
sm.WriteArray (fmt, fmt.Length);
sm.WriteStream (18 + formatSpecificData.Length);
sm.WriteStream ((UInt16) _audioFormat.EncodingFormat);
sm.WriteStream ((UInt16) _audioFormat.ChannelCount);
sm.WriteStream (_audioFormat.SamplesPerSecond);
sm.WriteStream (_audioFormat.AverageBytesPerSecond);
sm.WriteStream ((UInt16) _audioFormat.BlockAlign);
sm.WriteStream ((UInt16) _audioFormat.BitsPerSample);
sm.WriteStream ((UInt16) formatSpecificData.Length);
// write codec specific data
if (formatSpecificData.Length > 0)
{
sm.WriteStream (formatSpecificData);
}
char [] data = new char [4] { 'd', 'a', 't', 'a' };
sm.WriteArray (data, data.Length);
sm.WriteStream (_rawAudioData.Length);
}
#if SPEECHSERVER
#pragma warning disable 56518 // The Binary reader cannot be disposed or it would close the underlying stream
[SuppressMessage("Microsoft.Reliability", "CA2000:DisposeObjectsBeforeLosingScope")]
internal RecognizedAudio RemoveMetaData()
{
// Check format:
if ((int)_audioFormat.EncodingFormat == 0x8000 - (int)EncodingFormat.Pcm ||
(int)_audioFormat.EncodingFormat == 0x8000 - (int)EncodingFormat.ULaw ||
(int)_audioFormat.EncodingFormat == 0x8000 - (int)EncodingFormat.ALaw)
{
// We have metadata so remove it:
// Read metadata info from the format:
byte[] formatSpecificData = _audioFormat.FormatSpecificData();
if (formatSpecificData.Length < 4)
{
throw new FormatException(SR.Get(SRID.ExtraDataNotPresent));
}
ushort metaDataSize;
using (MemoryStream metaDataStream = new MemoryStream(formatSpecificData))
{
BinaryReader br = new BinaryReader(metaDataStream);
br.ReadUInt16(); // Is metadata present - not used here.
metaDataSize = br.ReadUInt16();
}
int bytesPerSample = _audioFormat.BitsPerSample / 8;
if (bytesPerSample < 1 || bytesPerSample > 2)
{
throw new FormatException(SR.Get(SRID.BitsPerSampleInvalid));
}
// Calculate size of data part of block. As well as the metadata there are 6 bytes of overhead {signature, number of samples and reserved}.
int sampleBlockSize = (int)_audioFormat.BlockAlign - metaDataSize - 6;
if (sampleBlockSize < 0)
{
throw new FormatException(SR.Get(SRID.DataBlockSizeInvalid));
}
// Check we have a whole number of blocks:
if (_rawAudioData.Length % _audioFormat.BlockAlign != 0)
{
throw new FormatException(SR.Get(SRID.NotWholeNumberBlocks));
}
// Actually copy the audio data to a new array:
byte[] newAudioData = ProcessMetaDataBlocks(metaDataSize, bytesPerSample, sampleBlockSize);
// Make new format:
EncodingFormat newEncodingFormat = (EncodingFormat)(-((int)_audioFormat.EncodingFormat - 0x8000));
int newAverageBytesPerSecond = (int)(((long)_audioFormat.AverageBytesPerSecond * sampleBlockSize) / _audioFormat.BlockAlign);
short newBlockAlign = (short)(bytesPerSample * _audioFormat.ChannelCount);
SpeechAudioFormatInfo newAudioFormat = new SpeechAudioFormatInfo(newEncodingFormat, _audioFormat.SamplesPerSecond, _audioFormat.BitsPerSample, _audioFormat.ChannelCount, newAverageBytesPerSecond, newBlockAlign, null);
// Make new RecognizedAudio {copying start, duration etc}:
return new RecognizedAudio(newAudioData, newAudioFormat, _startTime, _audioPosition, _audioDuration);
}
else
{
// No metadata - just return.
return this;
}
}
// Copy
private byte[] ProcessMetaDataBlocks(ushort metaDataSize, int bytesPerSample, int sampleBlockSize)
{
// Make new array: {this may be slightly too big if there are some empty packets - we resize later}
int numberOfBlocks = _rawAudioData.Length / _audioFormat.BlockAlign;
byte[] newAudioData = new byte[numberOfBlocks * sampleBlockSize];
// Copy new bytes: {removing metadata and zero parts of data}
int numberAudioBytes = 0;
using (MemoryStream dataStream = new MemoryStream(_rawAudioData))
{
BinaryReader br = new BinaryReader(dataStream);
for (int i = 0; i < numberOfBlocks; i++)
{
ushort signature = br.ReadUInt16();
ushort sampleCount = br.ReadUInt16();
br.ReadBytes(metaDataSize); // Meta data itself
br.ReadUInt16(); // Reserved value - not used here.
int bytesToCopy = sampleCount * bytesPerSample;
if (signature != (ushort)_audioFormat.EncodingFormat)
{
throw new FormatException(SR.Get(SRID.BlockSignatureInvalid));
}
if (bytesToCopy > sampleBlockSize)
{
throw new FormatException(SR.Get(SRID.NumberOfSamplesInvalid));
}
// Copy the required number of samles across:
int curPosition = (int)dataStream.Position;
int endPosition = curPosition + bytesToCopy;
for (; curPosition < endPosition; curPosition++, numberAudioBytes++)
{
newAudioData[numberAudioBytes] = _rawAudioData[curPosition];
}
dataStream.Position += sampleBlockSize;
}
Debug.Assert(dataStream.Position == _rawAudioData.Length);
}
// Resize if necessary:
Debug.Assert(numberAudioBytes <= newAudioData.Length);
if (numberAudioBytes < newAudioData.Length)
{
// Array.Resize(ref newAudioData, numberAudioBytes);
byte [] tempAudioData = new byte[numberAudioBytes];
Array.Copy(tempAudioData, newAudioData, numberAudioBytes);
newAudioData = tempAudioData;
}
return newAudioData;
}
#pragma warning restore 56518 // The Binary reader cannot be disposed or it would close the underlying stream
#endif
#endregion
//********************************************************************
//
// Private Fields
//
//*******************************************************************
#region Private Fields
DateTime _startTime;
TimeSpan _audioPosition;
TimeSpan _audioDuration;
SpeechAudioFormatInfo _audioFormat;
byte [] _rawAudioData;
#endregion
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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