private static byte[] SlowAudio(byte[] mp3, float newTempo = 0.95f, float newPitch = 1.2f, float newRate = .8f) { const int BUFFER_SIZE = 1024 * 16; byte[] buffer = new byte[BUFFER_SIZE]; var format = new WaveFormat(); try { using (var output = new MemoryStream()) { File.Delete("temp.wav"); File.Delete("temp2.wav"); using (var mp3Stream = new MemoryStream(mp3)) using (Mp3FileReader reader = new Mp3FileReader(mp3Stream)) { WaveFileWriter.CreateWaveFile("temp.wav", reader); } using (WaveFileReader reader = new WaveFileReader("temp.wav")) { int numChannels = reader.WaveFormat.Channels; if (numChannels > 2) throw new Exception("SoundTouch supports only mono or stereo."); int sampleRate = reader.WaveFormat.SampleRate; int bitPerSample = reader.WaveFormat.BitsPerSample; SoundStretcher stretcher = new SoundStretcher(sampleRate, numChannels); var writer = new NAudio.Lame.LameMP3FileWriter(output, new WaveFormat(sampleRate, 16, numChannels), 128); stretcher.Tempo = newTempo; stretcher.Pitch = newPitch; stretcher.Rate = newRate; short[] buffer2 = null; if (bitPerSample != 16 && bitPerSample != 8) { throw new Exception("Not implemented yet."); } if (bitPerSample == 8) { buffer2 = new short[BUFFER_SIZE]; } bool finished = false; while (true) { int bytesRead = 0; if (!finished) { bytesRead = reader.Read(buffer, 0, BUFFER_SIZE); if (bytesRead == 0) { finished = true; stretcher.Flush(); } else { if (bitPerSample == 16) { stretcher.PutSamplesFromBuffer(buffer, 0, bytesRead); } else if (bitPerSample == 8) { for (int i = 0; i < BUFFER_SIZE; i++) buffer2[i] = (short)((buffer[i] - 128) * 256); stretcher.PutSamples(buffer2); } } } bytesRead = stretcher.ReceiveSamplesToBuffer(buffer, 0, BUFFER_SIZE); writer.Write(buffer, 0, bytesRead); if (finished && bytesRead == 0) break; } reader.Close(); writer.Close(); } return output.ToArray(); } } finally { File.Delete("temp.wav"); File.Delete("temp2.wav"); } ///////////////////////////// }
private static void Concatenate(string outputFile, IEnumerable<byte[]> mp3s) { int i = 0; byte[] buffer = new byte[1024]; NAudio.Lame.LameMP3FileWriter mp3FileWriter = null; var format = new WaveFormat(); byte[][] silence = new byte[][] { new byte[1], new byte[1], new byte[1] }; try { mp3FileWriter = new NAudio.Lame.LameMP3FileWriter(outputFile, format, 128); silence = new byte[][] { new byte[(format.AverageBytesPerSecond * 1)], new byte[(format.AverageBytesPerSecond * 2)], new byte[(format.AverageBytesPerSecond * 3)], }; mp3FileWriter.Write(silence[1], 0, silence[1].Length); foreach (byte[] mp3 in mp3s) { i++; File.Delete("temp.wav"); File.Delete("temp2.wav"); using (var mp3Stream = new MemoryStream(mp3)) using (Mp3FileReader reader = new Mp3FileReader(mp3Stream)) { WaveFileWriter.CreateWaveFile("temp.wav", reader); } using (WaveFileReader reader = new WaveFileReader("temp.wav")) { if (!reader.WaveFormat.Equals(format)) { using (var conversionStream = new WaveFormatConversionStream(format, reader)) { WaveFileWriter.CreateWaveFile("temp2.wav", conversionStream); } using (WaveFileReader reader2 = new WaveFileReader("temp2.wav")) { int read; while ((read = reader2.Read(buffer, 0, buffer.Length)) > 0) { mp3FileWriter.Write(buffer, 0, read); } } } else { int read; while ((read = reader.Read(buffer, 0, buffer.Length)) > 0) { mp3FileWriter.Write(buffer, 0, read); } } } mp3FileWriter.Write(silence[1], 0, silence[1].Length); } mp3FileWriter.Flush(); } finally { File.Delete("temp.wav"); File.Delete("temp2.wav"); if (mp3FileWriter != null) { mp3FileWriter.Dispose(); } } }
private async Task ConvertFiles(Func <BackgroundTaskControl, Task> callBack, BackgroundTaskControl bgtc) { await Task.Delay(250); // give time for rendering changes WaveStream inputStream = null; for (int i = 0; i < selectedSongs.Count(); i++) { try { if (selectedSongs[i].FilePath.EndsWith(".ogg")) { inputStream = new VorbisWaveReader(selectedSongs[i].FilePath); } else if (selectedSongs[i].FilePath.EndsWith(".flac")) { inputStream = new FlacReader(selectedSongs[i].FilePath); } else { inputStream = new AudioFileReader(selectedSongs[i].FilePath); } string selectedFileType = ""; Dispatcher.Invoke(() => { selectedFileType = OutputFileTypeComboBox.SelectedItem as string; WaitingLabel.Content = $"Now converting {selectedSongs[i].Name} to {selectedFileType.Substring(selectedFileType.IndexOf("(") + 1, 4)}"; bgtc.BackgroundTaskLabel.Content = WaitingLabel.Content; }); if (selectedFileType.EndsWith("(.mp3)")) { using (FileStream fileStream = File.Create($"{outputPath}/{selectedSongs[i].Name}.mp3")) using (NAudio.Lame.LameMP3FileWriter writer = new NAudio.Lame.LameMP3FileWriter(fileStream, inputStream.WaveFormat, 320000)) { byte[] buffer = new byte[4096]; int bytesRead = 0; do { bytesRead = inputStream.Read(buffer, 0, buffer.Length); writer.Write(buffer, 0, bytesRead); } while (bytesRead > 0); } TagLib.File outputTags = TagLib.File.Create($"{outputPath}/{selectedSongs[i].Name}.mp3"); TagLib.File inputTags = TagLib.File.Create(selectedSongs[i].FilePath); outputTags.Tag.Album = inputTags.Tag.Album; outputTags.Tag.AlbumArtists = inputTags.Tag.AlbumArtists; outputTags.Tag.Genres = inputTags.Tag.Genres; outputTags.Tag.Performers = inputTags.Tag.Performers; outputTags.Tag.Year = inputTags.Tag.Year; outputTags.Tag.Pictures = inputTags.Tag.Pictures; outputTags.Tag.Title = inputTags.Tag.Title; outputTags.Tag.Track = inputTags.Tag.Track; outputTags.Save(); inputTags.Dispose(); outputTags.Dispose(); } else if (selectedFileType.EndsWith("(.wav)")) { using (FileStream fileStream = File.Create($"{outputPath}/{selectedSongs[i].Name}.wav")) using (WaveFileWriter writer = new WaveFileWriter(fileStream, inputStream.WaveFormat)) { byte[] buffer = new byte[4096]; int bytesRead = 0; do { bytesRead = inputStream.Read(buffer, 0, buffer.Length); writer.Write(buffer, 0, bytesRead); } while (bytesRead > 0); } TagLib.File outputTags = TagLib.File.Create($"{outputPath}/{selectedSongs[i].Name}.wav"); TagLib.File inputTags = TagLib.File.Create(selectedSongs[i].FilePath); outputTags.Tag.Album = inputTags.Tag.Album; outputTags.Tag.AlbumArtists = inputTags.Tag.AlbumArtists; outputTags.Tag.Genres = inputTags.Tag.Genres; outputTags.Tag.Performers = inputTags.Tag.Performers; outputTags.Tag.Year = inputTags.Tag.Year; outputTags.Tag.Pictures = inputTags.Tag.Pictures; outputTags.Tag.Title = inputTags.Tag.Title; outputTags.Tag.Track = inputTags.Tag.Track; outputTags.Save(); inputTags.Dispose(); outputTags.Dispose(); } } catch (Exception e) { MessageBox.Show("Error converting " + selectedSongs[i].FilePath + ", message: " + e.Message); await callBack(bgtc); inputStream?.Close(); return; } finally { inputStream?.Close(); } } await callBack(bgtc); MessageBox.Show("File(s) successfully converted!"); }
private async Task ConvertFiles(Func <BackgroundTaskControl, Task> callBack, BackgroundTaskControl bgtc) { await Task.Delay(250); // give time for rendering changes WaveStream inputStream = null; for (int i = 0; i < filePaths.Count(); i++) { try { if (filePaths[i].EndsWith(".ogg")) { inputStream = new VorbisWaveReader(filePaths[i]); } else if (filePaths[i].EndsWith(".flac")) { inputStream = new FlacReader(filePaths[i]); } else { inputStream = new AudioFileReader(filePaths[i]); } string selectedFileType = ""; Dispatcher.Invoke(() => { selectedFileType = OutputFileTypeComboBox.SelectedItem as string; WaitingLabel.Content = $"Now converting {safeFileNames[i]} to {selectedFileType.Substring(selectedFileType.IndexOf("(")+1,4)}"; if (bgtc != null) { bgtc.BackgroundTaskLabel.Content = WaitingLabel.Content; } }); if (selectedFileType.EndsWith("(.mp3)")) { string monoStereoSelection = ""; Dispatcher.Invoke(() => { monoStereoSelection = MSConvertComboBox.SelectedItem as string; }); if (inputStream.WaveFormat.BitsPerSample == 16) { IWaveProvider provider = MonoStereoConvert16(inputStream, monoStereoSelection == "Mono"); using (FileStream fileStream = File.Create($"{outputPath}/{safeFileNames[i]}.mp3")) using (NAudio.Lame.LameMP3FileWriter writer = new NAudio.Lame.LameMP3FileWriter(fileStream, provider.WaveFormat, 320000)) { byte[] buffer = new byte[4096]; int bytesRead = 0; do { bytesRead = provider.Read(buffer, 0, buffer.Length); writer.Write(buffer, 0, bytesRead); } while (bytesRead > 0); } } else if (inputStream.WaveFormat.BitsPerSample == 32) { ISampleProvider provider = MonoStereoConvert32(inputStream as ISampleProvider, monoStereoSelection == "Mono"); using (FileStream fileStream = File.Create($"{outputPath}/{safeFileNames[i]}.mp3")) using (NAudio.Lame.LameMP3FileWriter writer = new NAudio.Lame.LameMP3FileWriter(fileStream, provider.WaveFormat, 320000)) { byte[] buffer = new byte[4096]; int bytesRead = 0; do { var providerAsWave = provider.ToWaveProvider(); // need to write with bytes not floats bytesRead = providerAsWave.Read(buffer, 0, buffer.Length); writer.Write(buffer, 0, bytesRead); } while (bytesRead > 0); } } TagLib.File outputTags = TagLib.File.Create($"{outputPath}//{safeFileNames[i]}.mp3"); TagLib.File inputTags = TagLib.File.Create(filePaths[i]); outputTags.Tag.Album = inputTags.Tag.Album; outputTags.Tag.AlbumArtists = inputTags.Tag.AlbumArtists; outputTags.Tag.Genres = inputTags.Tag.Genres; outputTags.Tag.Performers = inputTags.Tag.Performers; outputTags.Tag.Year = inputTags.Tag.Year; outputTags.Tag.Pictures = inputTags.Tag.Pictures; outputTags.Tag.Title = inputTags.Tag.Title; outputTags.Tag.Track = inputTags.Tag.Track; outputTags.Save(); inputTags.Dispose(); outputTags.Dispose(); } //else if (selectedFileType.EndsWith("(.wma)")) //{ // FileStream fileStream = File.Create($"c:/temp/conversiontest/{safeFileName}.wma"); // fileStream.Close(); // using (MediaFoundationEncoder writer = new MediaFoundationEncoder(new NAudio.MediaFoundation.MediaType(inputStream.WaveFormat))) // { // writer.Encode($"c:/temp/conversiontest/{safeFileName}.wma", inputStream); // } //} else if (selectedFileType.EndsWith("(.wav)")) { string monoStereoSelection = ""; Dispatcher.Invoke(() => { monoStereoSelection = MSConvertComboBox.SelectedItem as string; }); if (inputStream.WaveFormat.BitsPerSample == 16) { IWaveProvider provider = MonoStereoConvert16(inputStream, monoStereoSelection == "Mono"); using (FileStream fileStream = File.Create($"{outputPath}/{safeFileNames[i]}.wav")) using (WaveFileWriter writer = new WaveFileWriter(fileStream, provider.WaveFormat)) { byte[] buffer = new byte[4096]; int bytesRead = 0; do { bytesRead = provider.Read(buffer, 0, buffer.Length); writer.Write(buffer, 0, bytesRead); } while (bytesRead > 0); } } else if (inputStream.WaveFormat.BitsPerSample == 32) { ISampleProvider provider = MonoStereoConvert32(inputStream as ISampleProvider, monoStereoSelection == "Mono"); using (FileStream fileStream = File.Create($"{outputPath}/{safeFileNames[i]}.wav")) using (WaveFileWriter writer = new WaveFileWriter(fileStream, provider.WaveFormat)) { byte[] buffer = new byte[4096]; int bytesRead = 0; do { var providerAsWave = provider.ToWaveProvider(); // need to write with bytes not floats bytesRead = providerAsWave.Read(buffer, 0, buffer.Length); writer.Write(buffer, 0, bytesRead); } while (bytesRead > 0); } } TagLib.File outputTags = TagLib.File.Create($"{outputPath}/{safeFileNames[i]}.wav"); TagLib.File inputTags = TagLib.File.Create(filePaths[i]); outputTags.Tag.Album = inputTags.Tag.Album; outputTags.Tag.AlbumArtists = inputTags.Tag.AlbumArtists; outputTags.Tag.Genres = inputTags.Tag.Genres; outputTags.Tag.Performers = inputTags.Tag.Performers; outputTags.Tag.Year = inputTags.Tag.Year; outputTags.Tag.Pictures = inputTags.Tag.Pictures; outputTags.Tag.Title = inputTags.Tag.Title; outputTags.Tag.Track = inputTags.Tag.Track; outputTags.Save(); inputTags.Dispose(); outputTags.Dispose(); } } catch (Exception e) { MessageBox.Show("Error converting " + filePaths[i] + ", message: " + e.Message); //just move onto the next song } finally { (inputStream as WaveStream)?.Close(); } } await callBack(bgtc); MessageBox.Show("File(s) successfully converted!"); }
static void waveIn_DataAvailable(object sender, NAudio.Wave.WaveInEventArgs e) { waveFileWriter.Write(e.Buffer, 0, e.BytesRecorded); }