/// <summary>
/// Starts recording audio from the sound card
/// </summary>
///
private void btnRecord_Click(object sender, EventArgs e)
{
// Create capture device
source = new AudioCaptureDevice()
{
// Listen on 22050 Hz
DesiredFrameSize = 4096,
SampleRate = 22050,
// We will be reading 16-bit PCM
Format = SampleFormat.Format16Bit
};
// Wire up some events
source.NewFrame += source_NewFrame;
source.AudioSourceError += source_AudioSourceError;
// Create buffer for wavechart control
current = new float[source.DesiredFrameSize];
// Create stream to store file
stream = new MemoryStream();
encoder = new WaveEncoder(stream);
// Start
source.Start();
updateButtons();
}
public Encoder(EventHandler <NewFrameEventArgs> NewFrame, EventHandler <AudioSourceErrorEventArgs> AudioSourceError)
{
AudioDeviceCollection audioDevices = new AudioDeviceCollection(AudioDeviceCategory.Capture);
AudioDeviceInfo INfo = null;
foreach (var item in audioDevices)
{
INfo = item;
}
// Create capture device
this.source = new AudioCaptureDevice(INfo.Guid)
{
// Listen on 22050 Hz
DesiredFrameSize = FRAME_SIZE,
SampleRate = SAMPLE_RATE,
// We will be reading 16-bit PCM
Format = SampleFormat.Format16Bit
};
// Wire up some events
source.NewFrame += NewFrame;
source.AudioSourceError += AudioSourceError;
// Create buffer for wavechart control
this.current = new float[source.DesiredFrameSize];
// Create stream to store file
this.stream = new MemoryStream();
this.encoder = new WaveEncoder(stream);
}
public WaveStream(AudioDecoder decoder)
{
this.decoder = decoder;
this.encoder = new WaveEncoder(decoder, new MemoryStream(), decoder.StreamInfo);
dataBuffer = new byte[DATA_BUFFER_SIZE];
bufferHead = 0;
bufferTail = 0;
}
public static void SalvarSinal(Signal signal)
{
File.Delete(@"C:\a\teste.wav");
using (var fs = new FileStream(@"C:\a\teste.wav", FileMode.CreateNew))
{
var audioEncoder = new WaveEncoder(fs);
audioEncoder.Encode(signal);
}
}
private void initalizeAudioStuff()
{
try
{
AudioSource = new AudioCaptureDevice();
AudioDeviceInfo info = null;
var adc = new AudioDeviceCollection(AudioDeviceCategory.Capture);
foreach (var ad in adc)
{
string desc = ad.Description;
if (desc.IndexOf("Audio") > -1)
{
info = ad;
}
}
if (info == null)
{
AudioSource = new AudioCaptureDevice();
}
else
{
AudioSource = new AudioCaptureDevice(info);
}
//AudioCaptureDevice source = new AudioCaptureDevice();
AudioSource.DesiredFrameSize = 4096;
AudioSource.SampleRate = 44100;
//int sampleRate = 44100;
//int sampleRate = 22050;
AudioSource.NewFrame += AudioSource_NewFrame;
// AudioSource.Format = SampleFormat.Format64BitIeeeFloat;
AudioSource.AudioSourceError += AudioSource_AudioSourceError;
// AudioSource.Start();
int x = 1;
}
catch
{
}
// Create buffer for wavechart control
current = new float[AudioSource.DesiredFrameSize];
// Create stream to store file
stream = new MemoryStream();
encoder = new WaveEncoder(stream);
frames = 0;
samples = 0;
// Start
AudioSource.Start();
}
public Recorder(int xlocation, int ylocation, int width, int height, AudioDeviceInfo audioDevice)
{
audioEncoder = new WaveEncoder(@"D:\Projects\test_audio.wav");
audio = new AudioCaptureDevice(audioDevice);
captureStream = new ScreenCaptureStream(new System.Drawing.Rectangle(xlocation, ylocation, width, height));
video = new VideoFileWriter();
audio.DesiredFrameSize = 4096;
audio.SampleRate = 44100;
audio.NewFrame += Audio_NewFrame;
captureStream.FrameInterval = 1;
captureStream.NewFrame += CaptureStream_NewFrame;
}
/// <summary>
/// Starts recording audio from the sound card
/// 开始从声卡录制音频
/// </summary>
///
private void BtnRecord_Click(object sender, EventArgs e)
{
// Create capture device
//[1]创建本地音频捕获设备
#region 本地音频捕获设备
/*
* 本地音频捕获设备（即麦克风）的音频源。
* 备考：此accord.audio.iaudiosource捕获从本地音频获取的音频数据
* 捕获设备，如麦克风。使用DirectSound捕获音频
* 通过slimdx。//有关如何列出捕获设备的说明，
* 请参见accord.directsound.audioDeviceCollection//文档页。
*/
#endregion
source = new AudioCaptureDevice()
{
//获取或设置所需的帧大小。
//监听22050赫兹
// Listen on 22050 Hz
DesiredFrameSize = 4096,
SampleRate = 22050,
#region 我们将读取16位PCM（脉冲编码调制）
//我们将读取16位PCM（脉冲编码调制）
// We will be reading 16-bit PCM
//PCM 即脉冲编码调制 (Pulse Code Modulation)。
//https://baike.baidu.com/item/pcm%E7%BC%96%E7%A0%81/10865033?fr=aladdin
#endregion
Format = SampleFormat.Format16Bit
};
// Wire up some events
//注册音频资源事件
source.NewFrame += source_NewFrame;
source.AudioSourceError += source_AudioSourceError;
// Create buffer for wavechart control
//每帧上要读取的样本量。
Current = new float[source.DesiredFrameSize];
// Create stream to store file
//创建流以存储文件
stream = new MemoryStream();
encoder = new WaveEncoder(stream);
// Start
source.Start();
updateButtons();
}
private void StopVoiceCapture()
{
AudioCapture.SignalToStop();
FrameRate = (double)BitmapsCount / _waveEncoder.Duration * 1000;
BitmapsCount = 0;
AudioCapture.NewFrame -= NewAudioFrame;
AudioCapture.AudioSourceError -= AudioError;
AudioCapture = null;
_waveEncoder = null;
_audioStream.Close();
_audioStream = null;
stopAll -= StopVoiceCapture;
}
private void StartVoiceCapture(string fileName)
{
AudioCapture = new AudioCaptureDevice(new Guid(Properties.UserSettings.Default.Microphone));
// Specify capturing options
AudioCapture.DesiredFrameSize = 4096;
AudioCapture.SampleRate = 44100;
AudioCapture.NewFrame += NewAudioFrame;
AudioCapture.AudioSourceError += AudioError;
_audioStream = new FileStream(baseDirectory + "AppFiles/TempFiles/" + fileName, FileMode.Create);
_waveEncoder = new WaveEncoder(_audioStream);
AudioCapture.Start();
}
public async void RecordAudioToFile(string _path = "1.wav")
{
if (_microphone == null)
{
SetRecorder();
}
if (FinishRecord == null)
{
throw new Exception("FinishRecord function not set!");
}
if (_path == null)
{
throw new ArgumentNullException("Error! Argument path is null!");
}
else if (_path != "1.wav")
{
RecordPath = _path;
}
Task t = new Task(OnListeningAsync);
try
{
_fileStream = new FileStream(RecordPath, FileMode.OpenOrCreate, FileAccess.Write);
_audioSaver = new WaveEncoder();
_audioSaver.Open(_fileStream);
IsRecordContinue = true;
_microphone.Start();
t.Start();
await t;
_microphone.WaitForStop();
}
catch (Exception e)
{
Console.WriteLine("Exception: " + e.Message);
}
finally
{
t.Dispose();
_microphone.Dispose();
_audioSaver?.Close();
_fileStream?.Close();
IsRecordContinue = false;
}
}
private void adjustVolume(float value)
{
// First, we rewind the stream
stream.Seek(0, SeekOrigin.Begin);
// Then we create a decoder for it
decoder = new WaveDecoder(stream);
var signal = decoder.Decode();
// We apply the volume filter
var volume = new VolumeFilter(value);
volume.ApplyInPlace(signal);
// Then we store it again
stream.Seek(0, SeekOrigin.Begin);
encoder = new WaveEncoder(stream);
encoder.Encode(signal);
}
private void btnRecord_Click(object sender, EventArgs e)
{
// Create capture device
source = new AudioCaptureDevice();
source.DesiredFrameSize = 4096;
source.SampleRate = 22050;
source.NewFrame += source_NewFrame;
source.AudioSourceError += source_AudioSourceError;
// Create buffer for wavechart control
current = new float[source.DesiredFrameSize];
// Create stream to store file
stream = new MemoryStream();
encoder = new WaveEncoder(stream);
// Start
source.Start();
updateButtons();
}
public void StopRecording()
{
if (IsRecording())
{
MergeAudioAndVideo();
}
if (videoFileWriter != null)
{
videoFileWriter.Close();
videoFileWriter.Dispose();
videoFileWriter = null;
}
if (audioFileWriter != null || waveEncoder != null)
{
waveEncoder.Close();
waveEncoder = null;
audioFileWriter = null;
}
}
public void WaveEncoderConstructorTest()
{
// Load a file in PCM 16bpp format
// Number of samples: 352.800
// Number of frames: 176.400
// Sample rate: 44.100 Hz
// Block align: 4
// Channels: 2
// Duration: 4.0 s
// Bytes: 705.644
// Bitrate: 1411kbps
// sizeof(float) = 4
// sizeof(int) = 4
// sizeof(short) = 2
UnmanagedMemoryStream sourceStream = Properties.Resources.Grand_Piano___Fazioli___major_A_middle;
MemoryStream destinationStream = new MemoryStream();
// Create a decoder for the source stream
WaveDecoder sourceDecoder = new WaveDecoder(sourceStream);
Assert.AreEqual(2, sourceDecoder.Channels);
Assert.AreEqual(352800, sourceDecoder.Samples);
Assert.AreEqual(176400, sourceDecoder.Frames);
Assert.AreEqual(4000, sourceDecoder.Duration);
Assert.AreEqual(44100, sourceDecoder.SampleRate);
Assert.AreEqual(16, sourceDecoder.BitsPerSample);
Assert.AreEqual(1411200, sourceDecoder.AverageBitsPerSecond);
// Decode the signal in the source stream
Signal sourceSignal = sourceDecoder.Decode();
Assert.AreEqual(352800, sourceSignal.Samples);
Assert.AreEqual(176400, sourceSignal.Length);
Assert.AreEqual(4000, sourceSignal.Duration);
Assert.AreEqual(2, sourceSignal.Channels);
Assert.AreEqual(44100, sourceSignal.SampleRate);
Assert.AreEqual(sizeof(float) * 352800, sourceSignal.RawData.Length);
Assert.AreEqual(sizeof(short) * 352800, sourceDecoder.Bytes);
// Create a encoder for the destination stream
WaveEncoder encoder = new WaveEncoder(destinationStream);
// Encode the signal to the destination stream
encoder.Encode(sourceSignal);
Assert.AreEqual(2, encoder.Channels);
Assert.AreEqual(352800, encoder.Samples);
Assert.AreEqual(176400, encoder.Frames);
Assert.AreEqual(4000, encoder.Duration);
Assert.AreEqual(44100, encoder.SampleRate);
Assert.AreEqual(32, encoder.BitsPerSample);
Assert.AreEqual(sizeof(float) * 352800, encoder.Bytes);
// Rewind both streams, them attempt to read the destination
sourceStream.Seek(0, SeekOrigin.Begin);
destinationStream.Seek(0, SeekOrigin.Begin);
// Create a decoder to read the destination stream
WaveDecoder destDecoder = new WaveDecoder(destinationStream);
Assert.AreEqual(2, destDecoder.Channels);
Assert.AreEqual(176400, destDecoder.Frames);
Assert.AreEqual(352800, destDecoder.Samples);
Assert.AreEqual(4000, destDecoder.Duration);
Assert.AreEqual(44100, destDecoder.SampleRate);
Assert.AreEqual(32, destDecoder.BitsPerSample);
Assert.AreEqual(1411200, sourceDecoder.AverageBitsPerSecond);
// Decode the destination stream
Signal destSignal = destDecoder.Decode();
// Assert that the signal which has been saved to the destination
// stream and the signal which has just been read from this same
// stream are identical
Assert.AreEqual(sourceSignal.Length, destSignal.Length);
Assert.AreEqual(sourceSignal.SampleFormat, destSignal.SampleFormat);
Assert.AreEqual(sourceSignal.SampleRate, destSignal.SampleRate);
Assert.AreEqual(sourceSignal.Samples, destSignal.Samples);
Assert.AreEqual(sourceSignal.Duration, destSignal.Duration);
for (int i = 0; i < sourceSignal.RawData.Length; i++)
{
byte actual = sourceSignal.RawData[i];
byte expected = destSignal.RawData[i];
Assert.AreEqual(expected, actual);
}
}
private void InitAudioFileWriter()
{
audioFileWriter = new FileStream(audioOutputFile, FileMode.Create);
waveEncoder = new WaveEncoder(audioFileWriter);
}
public void WaveEncoderConstructorTest()
{
string basePath = Path.Combine(TestContext.CurrentContext.TestDirectory, "Resources");
#region doc_properties
// Let's say we would like to decode a wave file:
string fileName = Path.Combine(basePath, "a.wav");
// File is in PCM 16bpp format:
// Number of samples: 352.800
// Number of frames: 176.400
// Sample rate: 44.100 Hz
// Block align: 4
// Channels: 2
// Duration: 4.0 s
// Bytes: 705.644
// Bitrate: 1411kbps
// First, create a decoder for the file stream:
var sourceDecoder = new WaveDecoder(fileName);
// Now we can use it to check some of the the stream properties:
int numberOfChannels = sourceDecoder.NumberOfChannels; // 2
int numberOfSamples = sourceDecoder.NumberOfSamples; // 352800
int numberOfFrames = sourceDecoder.NumberOfFrames; // 176400
int durationMilliseconds = sourceDecoder.Duration; // 4000
int sampleRate = sourceDecoder.SampleRate; // 44100
int bitsPerSample = sourceDecoder.BitsPerSample; // 16
int bps = sourceDecoder.AverageBitsPerSecond; // 141200
// Decode the signal in the source stream:
Signal sourceSignal = sourceDecoder.Decode();
// As we can see, all properties are kept in the signal:
int signalChannels = sourceSignal.NumberOfChannels; // 2
int signalSamples = sourceSignal.NumberOfSamples; // 352800
int signalFrames = sourceSignal.NumberOfFrames; // 176400
TimeSpan signalDuration = sourceSignal.Duration; // {00:00:04}
int signalLength = sourceSignal.Length; // 176400
int signalSampleRate = sourceSignal.SampleRate; // 44100
int signalBytes = sourceSignal.NumberOfBytes; // 1411200
// And this is the total number of bytes that have been read:
int numberOfBytes = sourceDecoder.NumberOfBytesRead; // 705600
#endregion
Assert.AreEqual(2, numberOfChannels);
Assert.AreEqual(352800, numberOfSamples);
Assert.AreEqual(176400, numberOfFrames);
Assert.AreEqual(4000, durationMilliseconds);
Assert.AreEqual(44100, sampleRate);
Assert.AreEqual(16, bitsPerSample);
Assert.AreEqual(1411200, bps);
Assert.AreEqual(sizeof(short) * 352800, numberOfBytes);
Assert.AreEqual(352800, signalSamples);
Assert.AreEqual(176400, signalLength);
Assert.AreEqual(4000, signalDuration.TotalMilliseconds);
Assert.AreEqual(2, signalChannels);
Assert.AreEqual(44100, signalSampleRate);
Assert.AreEqual(sizeof(float) * 352800, signalBytes);
MemoryStream destinationStream = new MemoryStream();
// Create a encoder for the destination stream
WaveEncoder encoder = new WaveEncoder(destinationStream);
// Encode the signal to the destination stream
encoder.Encode(sourceSignal);
Assert.AreEqual(2, encoder.Channels);
Assert.AreEqual(352800, encoder.Samples);
Assert.AreEqual(176400, encoder.Frames);
Assert.AreEqual(4000, encoder.Duration);
Assert.AreEqual(44100, encoder.SampleRate);
Assert.AreEqual(32, encoder.BitsPerSample);
Assert.AreEqual(sizeof(float) * 352800, encoder.Bytes);
// Rewind both streams, them attempt to read the destination
destinationStream.Seek(0, SeekOrigin.Begin);
// Create a decoder to read the destination stream
WaveDecoder destDecoder = new WaveDecoder(destinationStream);
Assert.AreEqual(2, destDecoder.Channels);
Assert.AreEqual(176400, destDecoder.Frames);
Assert.AreEqual(352800, destDecoder.Samples);
Assert.AreEqual(4000, destDecoder.Duration);
Assert.AreEqual(44100, destDecoder.SampleRate);
Assert.AreEqual(32, destDecoder.BitsPerSample);
Assert.AreEqual(1411200, sourceDecoder.AverageBitsPerSecond);
// Decode the destination stream
Signal destSignal = destDecoder.Decode();
// Assert that the signal which has been saved to the destination
// stream and the signal which has just been read from this same
// stream are identical
Assert.AreEqual(sourceSignal.Length, destSignal.Length);
Assert.AreEqual(sourceSignal.SampleFormat, destSignal.SampleFormat);
Assert.AreEqual(sourceSignal.SampleRate, destSignal.SampleRate);
Assert.AreEqual(sourceSignal.Samples, destSignal.Samples);
Assert.AreEqual(sourceSignal.Duration, destSignal.Duration);
byte[] actual = sourceSignal.ToByte();
byte[] expected = destSignal.ToByte();
Assert.AreEqual(expected, actual);
}
public void Init(IntPtr handle)
{
audioOutputDeviceOwnerHandle = handle;
memoryStream = new MemoryStream();
encoder = new WaveEncoder(memoryStream);
}
