C# wav语音文件合并

开发完成语音播报产品，由于客户所使用的播放产品种类繁多，在使用HDMI接口播放音频时，由于采用的声卡不同，个别机器会出现播报声音过小，或者不播报的情况。所以采用将语音文件合并播放的方式，来解决此问题。

　　 /// <summary>
        /// 合并语音流
        /// </summary>
        /// <param name="pPlayStreamsList">语音流集合</param>
        public void MergeAndPlayWavFile(ObservableCollection<Stream> pPlayStreamsList)
        {
            try
            {
                if (pPlayStreamsList.Count > 0)
                {
                    int dataFileBeginIndex = 0;
                    int formatSize;
                    List<byte[]> bInfoList = new List<byte[]>();
                    List<int> fileSizeList = new List<int>();
                    List<int> dataSizeList = new List<int>();
                    foreach (Stream fs in pPlayStreamsList)
                    {
                        fs.Position = 0;
                        byte[] bInfo = new byte[46];
                        fs.Read(bInfo, 0, 46);
                        formatSize = BitConverter.ToInt32(bInfo, 16);
                        //Wave = RIFF_WAVE_Chunk + Format_Chunk + Data_Chunk(RIFF)/Fact_Chunk(FACT)
                        //RIFF_WAVE_Chunk（文件头，12个字节）+
                        //Format_Chunk（声音内容定义，根据第16到20个字节得到剩下区块大小，16或者18个字节）+
                        //Data_Chunk（数据区）
                        dataFileBeginIndex = formatSize + 20 + 4;
                        bInfoList.Add(bInfo);
                        fileSizeList.Add(System.BitConverter.ToInt32(bInfo, 4));
                        dataSizeList.Add(System.BitConverter.ToInt32(bInfo, dataFileBeginIndex));
                    }

                    //计算所有WAV文件大小
                    int fileSize = 0;
                    foreach (int fSize in fileSizeList)
                    {
                        fileSize += fSize;
                    }
                    byte[] totalFileSize = System.BitConverter.GetBytes(fileSize);

                    //计算所有WAV数据大小
                    int dataSize = 0;
                    foreach (int dSize in dataSizeList)
                    {
                        dataSize += dSize;
                    }
                    byte[] totalDataSize = System.BitConverter.GetBytes(dataSize);
                    using (Stream toFile = new MemoryStream())
                    {
                        //Stream toFile = new MemoryStream();
                        BinaryWriter bWriter = new BinaryWriter(toFile);

                        //获取最后一个wav文件的详细内容
                        int lastWaveFile = pPlayStreamsList.Count - 1;

                        for (int i = 4, j = 0; i < 8; i++, j++)
                        {
                            bInfoList[lastWaveFile][i] = totalFileSize[j];
                        }

                        for (int i = dataFileBeginIndex, j = 0; i < dataFileBeginIndex + 4; i++, j++)
                        {
                            bInfoList[lastWaveFile][i] = totalDataSize[j];
                        }
                        bWriter.Write(bInfoList[lastWaveFile]);
                        int k = 0;
                        foreach (Stream fs in pPlayStreamsList)
                        {
                            int readLength;
                            fs.Position = dataFileBeginIndex + 4;
                            if (k < dataSizeList.Count)
                            {
                                readLength = dataSizeList[k] - 40;
                                byte[] dushu = new byte[readLength];
                                fs.Read(dushu, 0, readLength);
                                bWriter.Write(dushu, 0, readLength);
                                k++;
                            }
                        }
                        SoundPlayer player = new SoundPlayer();
                        if (toFile != null)
                        {
                            player.Stream = null;
                            player.Stream = toFile;
                            toFile.Position = 0;
                            player.LoadAsync();
                            for (int i = 0; i < playTimes; i++)
                            { player.PlaySync(); }

                        }

                        bWriter.Flush();
                        bWriter.Close();

                        toFile.Flush();
                        toFile.Close();
                        player.Dispose();
                        bWriter.Dispose();
                        toFile.Dispose();
                    }
                }
            }
            catch (Exception e)
            {
                LogInfo.saveLog("合并语音流报错，方法MergeAndPlayWavFile（）：" + e.Message);
            }

　　 }