VST.NET vs NAUDIO (vstaudiobuffer vs pcmstream buffer)

Question

请告诉我如何将VSTaudiobuffer转换为PCMStream缓冲区，我尝试从http://vstnet.codeplex.com/Thread/View.aspx?ThreadId=216682，但没有用。

                int inputCount = PluginContext.PluginInfo.AudioInputCount;
                int outputCount = PluginContext.PluginInfo.AudioOutputCount;
                int blockSize = bytesWritten;                    

                VstAudioBufferManager inputMgr = new VstAudioBufferManager(inputCount, blockSize);
                VstAudioBufferManager outputMgr = new VstAudioBufferManager(outputCount, blockSize);

                foreach (VstAudioBuffer buffer in inputMgr.ToArray())
                {
                    for (int i = 0; i < blockSize; i++)
                    {
                        buffer[i] = (float)destBuffer[i] / 128.0f - 1.0f;
                    }
                }

                PluginContext.PluginCommandStub.SetBlockSize(blockSize);
                PluginContext.PluginCommandStub.SetSampleRate(44.8f);

                PluginContext.PluginCommandStub.StartProcess();
                PluginContext.PluginCommandStub.ProcessReplacing(inputMgr.ToArray(), outputMgr.ToArray());
                PluginContext.PluginCommandStub.StopProcess();                   

                foreach (VstAudioBuffer buffer in outputMgr.ToArray())
                {
                    for (int i = 0; i < blockSize; i++)
                    {
                        destBuffer[i] = Convert.ToByte(((float)buffer[i] + 1.0f) * 128.0f);                           
                    }                        
                }
                inputMgr.ClearBuffer(inputMgr.ToArray()[0]);
                inputMgr.ClearBuffer(inputMgr.ToArray()[1]);
                inputMgr.Dispose();
                outputMgr.ClearBuffer(outputMgr.ToArray()[0]);
                outputMgr.ClearBuffer(outputMgr.ToArray()[1]);
                outputMgr.Dispose();

Answer 1

问题是您的输入缓冲区是16位整数，范围是{ -32767.0 ..32767.0 }。您需要除以/乘以该值，而不是128，这将是7位。

此外，当您将1.0f减去/添加到您的转换值时，您正在以错误的顺序执行该操作，并将导致发生裁剪。转换应为：

buffer[i] = ((float)destBuffer[i]) / 32767.0f;

和

destBuffer[i] = Convert.ToByte(buffer[i] * 32768.0f);