public AudioFile(string filepath)
{
_reader = new AudioFileReader(filepath);
_sampleRate = _reader.ToWaveProvider().WaveFormat.SampleRate;
_channels = _reader.ToWaveProvider().WaveFormat.Channels;
float[] data = new float[_reader.Length];
_reader.Read(data, 0, data.Length);
if (_channels == 1)
{
_channel1 = data;
}
else
{
_channel1 = new float[data.Length / 2];
_channel2 = new float[data.Length / 2];
var chidx = 0;
for (int i = 0; i < data.Length; i++)
{
if (i % 2 == 0)
{
_channel1[chidx] = data[i];
}
else
{
_channel2[chidx] = data[i];
chidx++;
}
}
}
_length = _channel1.Length;
}
public CachedSound(string audioFileName)
{
using (var audioFileReader = new AudioFileReader(audioFileName))
{
// TODO: could add resampling in here if required
MediaFoundationResampler resampler = new MediaFoundationResampler(audioFileReader.ToWaveProvider(), 44100);
WaveFormat = resampler.WaveFormat;
var wholeFile = new List <float>((int)(audioFileReader.Length / 4));
var readBuffer = new byte[resampler.WaveFormat.SampleRate * resampler.WaveFormat.Channels];
int samplesRead;
while ((samplesRead = resampler.Read(readBuffer, 0, readBuffer.Length)) > 0)
{
var tempByteArray = readBuffer.Take(samplesRead).ToArray();
var tempfloatarray = new float[tempByteArray.Count() / 4];
Buffer.BlockCopy(tempByteArray, 0, tempfloatarray, 0, tempByteArray.Count());
wholeFile.AddRange(tempfloatarray);
}
AudioData = wholeFile.ToArray();
}
}
public static void BeginAudioPlayback(string filePath, AudioOutputDevice audioOutputDevice, float volume, double beginTime, double endTime)
{
try
{
AudioFileReader audioFileReader = new AudioFileReader(filePath);
// Configure mixer
MixingSampleProvider mixer = new MixingSampleProvider(WaveFormat.CreateIeeeFloatWaveFormat(audioFileReader.WaveFormat.SampleRate, 2));
// Force audio to stereo 2-channel
MultiplexingWaveProvider waveProvider = new MultiplexingWaveProvider(new IWaveProvider[] { audioFileReader.ToWaveProvider() }, audioFileReader.WaveFormat.Channels > 1 ? 2 : 1);
// Apply volume preferences
VolumeSampleProvider volumeSampleProvider = new VolumeSampleProvider(waveProvider.ToSampleProvider())
{
Volume = volume
};
// Force sample rate
ISampleProvider convertedSampleProvider = ConvertToMixerSampleRate(mixer, ConvertToMixerChannelCount(mixer, volumeSampleProvider));
// Seek
OffsetSampleProvider offsetSampleProvider = new OffsetSampleProvider(convertedSampleProvider);
offsetSampleProvider.SkipOver = TimeSpan.FromSeconds(beginTime);
offsetSampleProvider.Take = TimeSpan.FromSeconds(endTime) - offsetSampleProvider.SkipOver;
// Configure mixer
mixer.AddMixerInput(offsetSampleProvider);
audioOutputDevice.InitializeAndPlay(mixer);
audioOutputDevice.PlaybackStopped += (sender, e) =>
{
//audioFileReader.Close();
audioFileReader.Dispose();
};
}
catch (Exception ex)
{
ApplicationLogger.Log(ex.Message, ex.StackTrace);
}
}
public void mixing()
{
/*
* var mixer = new WaveMixerStream32 { AutoStop = true };
* var wav1 = new WaveFileReader(_micPath);
* var wav2 = new WaveFileReader(_loopBackPath);
*
* // float levelWav1_mic = 1.0f;
* // float levelWav2_loopBack = 1.0f;
* var waveChan1 = new WaveChannel32(wav1);
* // waveChan1.Volume = 2.0f;
* if (TextBox_LevelMic.Text.Length > 0)
* {
* string strLevelMic = TextBox_LevelMic.Text;
* if(strLevelMic != "1.0")
* {
* float fLevelMic = float.Parse(strLevelMic);
* waveChan1.Volume = fLevelMic;
* }
*
* }
* mixer.AddInputStream(waveChan1);
* var waveChan2 = new WaveChannel32(wav2);
* // waveChan2.Volume = 0.5f;
* if (TextBox_levelLoopBack.Text.Length > 0)
* {
* string strlevelLoopBack = TextBox_levelLoopBack.Text;
* if (strlevelLoopBack != "1.0")
* {
* float fLevelLoopBack = float.Parse(strlevelLoopBack);
* waveChan2.Volume = fLevelLoopBack;
* }
* }
* mixer.AddInputStream(waveChan2);
* _outputPath = TextBox_area2.Text;
*
* _fileOutputWavFullExt = System.IO.Path.Combine(_outputPath, Path.GetFileName(_micPath).Replace("_mic", ""));
* WaveFileWriter.CreateWaveFile(_fileOutputWavFullExt, mixer);
*
*/
////////////////////////////////////////////////////////////////////////////////
const int rate = 48000;
//const int bits = 32;
const int channels = 2;
//WaveFormat wave_format = new WaveFormat(rate, bits, channels);
WaveFormat wave_format = WaveFormat.CreateIeeeFloatWaveFormat(rate, channels);
var wav1 = new AudioFileReader(_micPath);
var wav2 = new AudioFileReader(_loopBackPath);
if (TextBox_LevelMic.Text.Length > 0)
{
string strLevelMic = TextBox_LevelMic.Text;
if (strLevelMic != "1.0")
{
float fLevelMic = float.Parse(strLevelMic);
wav1.Volume = fLevelMic;
}
}
if (TextBox_levelLoopBack.Text.Length > 0)
{
string strlevelLoopBack = TextBox_levelLoopBack.Text;
if (strlevelLoopBack != "1.0")
{
float fLevelLoopBack = float.Parse(strlevelLoopBack);
wav2.Volume = fLevelLoopBack;
}
}
var resampler2 = new MediaFoundationResampler(wav2, wave_format);
var mixer = new MixingSampleProvider(wave_format);
// var mixer = new MixingSampleProvider(new[] { wav1, wav2 });
mixer.AddMixerInput(resampler2);
mixer.AddMixerInput(wav1.ToWaveProvider());
_outputPath = TextBox_area2.Text;
this.Dispatcher.BeginInvoke((Action)(() =>
{
if (_outputPath.Length == 0)
{
_outputPath = _mainWindow.TextBox_path.Text;
TextBox_area2.Text = _outputPath;
}
_fileOutputWavFullExt = System.IO.Path.Combine(_outputPath, Path.GetFileName(_micPath).Replace("_mic", ""));
WaveFileWriter.CreateWaveFile(_fileOutputWavFullExt, mixer.ToWaveProvider());
}));
}
