Code:
/ Dotnetfx_Win7_3.5.1 / Dotnetfx_Win7_3.5.1 / 3.5.1 / 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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