在wav.file中编写Header wav

本文介绍了在wav.file中编写Header wav的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述 当我写 bwl.Write（缓冲区）; 我的Subchunk2Size比初始文件大...... 使用（ var wfr = new WaveFileReader（fs）） { var outputFormat = new WaveFormat（ 8000 ， 16 ， 1 ）; 使用（ var pcmStream = new WaveFormatConversionStream（outputFormat，wfr）） { 使用（ var ms = new MemoryStream（）） { BinaryWriter bwl = new BinaryWriter（ms ）; var bytesRead = -1; while （bytesRead！= 0 ） { var buffer = new byte [pcmStream.WaveFormat。 AverageBytesPerSecond]; bytesRead = pcmStream.Read（buffer， 0 ，pcmStream.WaveFormat.AverageBytesPerSecond）; int length =（ int ）fs.Length - 8 ; program.channels = 1 ; program.samplerate = 8000 ;; program.BitsPerSample = 16 ; // br.ReadInt16（）; program.DataLength =（ int ）ms.Length - 44 ; bwl.Write（ new char [ 4 ] {' R'，' 我'，' F '，' F'}）; bwl.Write（length）; bwl.Write（ new char [ 8 ] {' W'，' A'，' V'，' E'，' f'，' m'，' t'，' '}）; bwl.Write（（ int ） 16 ）; bwl.Write（（ short ） 1 ）; bwl.Write（program.channels）; bwl.Write（program.samplerate）; bwl.Write（（ int ）（program.samplerate *（（program.BitsPerSample * program.channels）/ 8 ）））; bwl.Write（（ short ）（（program.BitsPerSample * program.channels）/ 8 ））; bwl.Write（program.BitsPerSample）; bwl.Write（ new char [ 4 ] {' d'，' a'，' t'，' a'}）; // bw.Write（Header.DataLength）; bwl.Write （缓冲）; System.IO.File.WriteAllBytes（ @ C：Desktop\waveConvertBuff.wav ，ms.GetBuffer（））; } bwl.Close（）; fs.Close（）; ms.Close（）; } } 我的waveConvertBuff.wav长度大约是74h hoiur但玩的时候初始长度是正确的（4秒） 为什么？解决方案 我最近开发并调试了这部分Wave写作，可以和你分享： 命名空间 Wave { 使用系统; 使用 System.IO; 使用 Encoding = System.Text.Encoding; public partial class WaveWriter：BinaryWriter，IDisposable { public WaveWriter（ string fileName ）： base （ new FileStream（fileName，FileMode.Create，FileAccess.Write）） { Initialize（ new WaveParameterWriter（））; } // WaveWriter public WaveWriter（ string fileName， uint rate，短位，短个频道）： base （ new FileStream（fileName，FileMode.Create，FileAccess.Write））{ Initialize（ new WaveParameterWriter（rate，比特，频道））; } // WaveWriter public WaveWriter（Stream stream）： base （stream）{Initialize（ new WaveParameterWriter（））; } public WaveWriter（流码流， uint 率， 位，短个频道）： base （stream）{ Initialize（ new WaveParameterWriter（rate，bits，channels））; } // WaveWriter void Initialize（WaveParameterWriter parameterWriter）{ this .waveParameterWriter = parameterWriter; WriteRiffHeader（）; } // 初始化 void WriteRiffHeader（）{ Func< string， byte [] > serialize =（id）= > { return Encoding.ASCII.GetBytes（id） ; }; 写（serialize（DefinitionSet.ChunkId））; // chunk ID Write（audioDataSize + DefinitionSet.ChunkHeaderSize）; // chunk Size Write（serialize（DefinitionSet.Format））; // format 写（serialize（DefinitionSet.SubChunkOneId））; // Subchunk1 ID Write（DefinitionSet.SubChunkOneSize）; // subchunk1 size（18 for PCM） Write（DefinitionSet.AudioFormatPcm）; // 音频格式，1代表PCM // 变量参数：NumChannels，SampleRate，ByteRate，BlockAlign，BitsPerSample： waveParameterWriter.Write（此）; Write（DefinitionSet.ExtraParameterSizePcm）; // 额外参数大小，0表示PCM 写入（serialize（DefinitionSet.SubChunkTwoId）） ; // // Subchunk2 ID Write（audioDataSize）; // subchunk2 size audioStreamStart = this .BaseStream.Position; } // WriteRiffHeader void IDisposable.Dispose（）{Close（）; } public 覆盖 void 关闭（）{ 如果（isClosed） return ; audioDataSize =（ uint ）（ this .BaseStream.Position - audioStreamStart）; Seek（ 0 ，SeekOrigin.Begin）; WriteRiffHeader（）; isClosed = true ; base .Close（）; } // 关闭 long audioStreamStart; WaveParameterWriter waveParameterWriter; uint audioDataSize; bool isClosed; 密封 类 WaveParameterWriter { internal WaveParameterWriter（）： this （DefinitionSet.DefaultRate，DefinitionSet.DefaultBitsPerSample，DefinitionSet.DefaultChannels）{} 内部 WaveParameterWriter（ uint rate， short 位，短个频道）{ 此 .channels = channels; 此 .sampleRate = rate; this .bitsPerSample = bits; 此 .blockAlign =（ short ）（渠道*（bits / 8 ））; this .byteRate =（ uint ）（sampleRate * blockAlign）; } // WaveHeaderWriter 内部 void 写入（BinaryWriter writer）{ writer.Write（channels）; writer.Write（sampleRate）; writer.Write（byteRate）; writer.Write（blockAlign）; writer.Write（bitsPerSample）; } // 写 简短的频道; uint sampleRate; uint byteRate; short blockAlign; short bitsPerSample; } // 类WaveHeaderWriter } // 类WaveWriter } // namespace Wave 它基于以下定义： 使用系统; 使用 System.Collections.Generic; 命名空间 Wave { public partial class WaveWriter { static class DefinitionSet { // 请参阅https://ccrma.stanford.edu/courses/422/projects/WaveFormat internal const string ChunkId = RIFF ; internal const uint ChunkHeaderSize = 38 ; internal const string 格式= WAVE; internal const string SubChunkOneId = fmt; 内部 const uint SubChunkOneSize = 18 ; 内部 const 简短 AudioFormatPcm = 1 ; // 变量参数：NumChannels，SampleRate，ByteRate，BlockAlign，BitsPerSample 内部 const 简短 ExtraParameterSizePcm = 0 ; internal const string SubChunkTwoId = data; internal const uint DefaultRate = 44100 ; 内部 const 简短 DefaultBitsPerSample = 16 ; 内部 const 简短 DefaultChannels = 2 ; } // class DefinitionSet } // class WaveWriter } // 命名空间Wave 我测试的很漂亮好;它很有用。 首先，我使用了这篇文档： https://ccrma.stanford.edu/courses/422/projects/WaveFormat [ ^ ]。 -SA 你的课很酷，昨天我错过了阅读我的波形标题，这是一个写数据的问题。长度比原来大!! When i write bwl.Write(buffer);my Subchunk2Size is bigger than the initial file...using (var wfr = new WaveFileReader(fs)) { var outputFormat = new WaveFormat(8000, 16, 1); using (var pcmStream = new WaveFormatConversionStream(outputFormat, wfr)) { using (var ms = new MemoryStream()) { BinaryWriter bwl = new BinaryWriter(ms); var bytesRead = -1; while (bytesRead != 0) { var buffer = new byte[pcmStream.WaveFormat.AverageBytesPerSecond]; bytesRead = pcmStream.Read(buffer, 0, pcmStream.WaveFormat.AverageBytesPerSecond); int length = (int)fs.Length - 8; program.channels = 1; program.samplerate = 8000;; program.BitsPerSample = 16;// br.ReadInt16(); program.DataLength = (int)ms.Length - 44; bwl.Write(new char[4] { 'R', 'I', 'F', 'F' }); bwl.Write(length); bwl.Write(new char[8] { 'W', 'A', 'V', 'E', 'f', 'm', 't', ' ' }); bwl.Write((int)16); bwl.Write((short)1); bwl.Write(program.channels); bwl.Write(program.samplerate); bwl.Write((int)(program.samplerate * ((program.BitsPerSample * program.channels) / 8))); bwl.Write((short)((program.BitsPerSample * program.channels) / 8)); bwl.Write(program.BitsPerSample); bwl.Write(new char[4] { 'd', 'a', 't', 'a' }); //bw.Write(Header.DataLength); bwl.Write(buffer); System.IO.File.WriteAllBytes(@"C:Desktop\waveConvertBuff.wav", ms.GetBuffer()); } bwl.Close(); fs.Close(); ms.Close(); } }my waveConvertBuff.wav lenght is about 74h hoiur but when playing the initial length is correct (4 seconds)Why? 解决方案 I recently developed and debugged this part of Wave writing, can share with you:namespace Wave { using System; using System.IO; using Encoding = System.Text.Encoding; public partial class WaveWriter : BinaryWriter, IDisposable { public WaveWriter(string fileName) : base(new FileStream(fileName, FileMode.Create, FileAccess.Write)) { Initialize(new WaveParameterWriter()); } //WaveWriter public WaveWriter(string fileName, uint rate, short bits, short channels) : base(new FileStream(fileName, FileMode.Create, FileAccess.Write)) { Initialize(new WaveParameterWriter(rate, bits, channels)); } //WaveWriter public WaveWriter(Stream stream) : base(stream) { Initialize(new WaveParameterWriter()); } public WaveWriter(Stream stream, uint rate, short bits, short channels) : base(stream) { Initialize(new WaveParameterWriter(rate, bits, channels)); } //WaveWriter void Initialize(WaveParameterWriter parameterWriter) { this.waveParameterWriter = parameterWriter; WriteRiffHeader(); } //Initialize void WriteRiffHeader() { Func<string, byte[]> serialize = (id) => { return Encoding.ASCII.GetBytes(id); }; Write(serialize(DefinitionSet.ChunkId)); // chunk ID Write(audioDataSize + DefinitionSet.ChunkHeaderSize); // chunk Size Write(serialize(DefinitionSet.Format)); // format Write(serialize(DefinitionSet.SubChunkOneId)); // Subchunk1 ID Write(DefinitionSet.SubChunkOneSize); //subchunk1 size (18 for PCM) Write(DefinitionSet.AudioFormatPcm); // Audio Format, 1 for PCM // variable parameters: NumChannels, SampleRate, ByteRate, BlockAlign, BitsPerSample: waveParameterWriter.Write(this); Write(DefinitionSet.ExtraParameterSizePcm); // extra parameter size, 0 for PCM Write(serialize(DefinitionSet.SubChunkTwoId)); // // Subchunk2 ID Write(audioDataSize); //subchunk2 size audioStreamStart = this.BaseStream.Position; } //WriteRiffHeader void IDisposable.Dispose() { Close(); } public override void Close() { if (isClosed) return; audioDataSize = (uint)(this.BaseStream.Position - audioStreamStart); Seek(0, SeekOrigin.Begin); WriteRiffHeader(); isClosed = true; base.Close(); } //Close long audioStreamStart; WaveParameterWriter waveParameterWriter; uint audioDataSize; bool isClosed; sealed class WaveParameterWriter { internal WaveParameterWriter() : this(DefinitionSet.DefaultRate, DefinitionSet.DefaultBitsPerSample, DefinitionSet.DefaultChannels) { } internal WaveParameterWriter(uint rate, short bits, short channels) { this.channels = channels; this.sampleRate = rate; this.bitsPerSample = bits; this.blockAlign = (short)(channels * (bits / 8)); this.byteRate = (uint)(sampleRate * blockAlign); } //WaveHeaderWriter internal void Write(BinaryWriter writer) { writer.Write(channels); writer.Write(sampleRate); writer.Write(byteRate); writer.Write(blockAlign); writer.Write(bitsPerSample); } //Write short channels; uint sampleRate; uint byteRate; short blockAlign; short bitsPerSample; } //class WaveHeaderWriter } //class WaveWriter} //namespace WaveIt is based on the following definitions:using System;using System.Collections.Generic;namespace Wave { public partial class WaveWriter { static class DefinitionSet { // see https://ccrma.stanford.edu/courses/422/projects/WaveFormat internal const string ChunkId = "RIFF"; internal const uint ChunkHeaderSize = 38; internal const string Format = "WAVE"; internal const string SubChunkOneId = "fmt "; internal const uint SubChunkOneSize = 18; internal const short AudioFormatPcm = 1; // variable parameters: NumChannels, SampleRate, ByteRate, BlockAlign, BitsPerSample internal const short ExtraParameterSizePcm = 0; internal const string SubChunkTwoId = "data"; internal const uint DefaultRate = 44100; internal const short DefaultBitsPerSample = 16; internal const short DefaultChannels = 2; } //class DefinitionSet } //class WaveWriter} //namespace WaveI tested it pretty well; it works.Primarily, I used this piece of documentation: https://ccrma.stanford.edu/courses/422/projects/WaveFormat[^].—SAYour class is prety cool, yesterday i missed up in reading my wave Header, it's when a write the data the problem. The length is bigger than original!! 这篇关于在wav.file中编写Header wav的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！