/// <summary>
/// 打开文件
/// </summary>
/// <param name="filePath">文件路径</param>
public bool OpenFile(string filePath)
{
//如果播放文件一样，没必要继续操作
if (_currentFilePath == filePath)
{
return(false);
}
//如果播放文件不存在直接退出
if (!File.Exists(filePath))
{
return(false);
}
StopAndCloseStream();
try
{
_waveOutDevice = new WaveOut()
{
DesiredLatency = 100
};
if (GetTypeWithExtension(filePath) == AudioFileType.Mp3)
{
_activeStream = new Mp3FileReader(filePath);
}
else if (GetTypeWithExtension(filePath) == AudioFileType.Wav)
{
_activeStream = new WaveFileReader(filePath);
}
else
{
return(false);
}
_inputStream = new WaveChannel32(_activeStream);
_sampleAggregator = new SampleAggregator(_fftDataSize);
_inputStream.Sample += InputStreamOnSampleChanged;
_waveOutDevice.Init(_inputStream);
_currentFilePath = filePath;
RefreshPlayingState();
return(true);
}
catch (Exception e)
{
_activeStream = null;
Debug.WriteLine(e);
throw;
}
}
public void OpenFile(string path)
{
Stop();
if (ActiveStream != null)
{
SelectionBegin = TimeSpan.Zero;
SelectionEnd = TimeSpan.Zero;
ChannelPosition = 0;
}
StopAndCloseStream();
if (System.IO.File.Exists(path))
{
try
{
waveOutDevice = new WaveOut()
{
DesiredLatency = 100
};
var extension = Path.GetExtension(path);
if (extension == null)
{
Debug.WriteLine(string.Format("只能播放有标准后缀名的文件，此文件{0}不标准", path));
return;
}
//判断是MP3文件还是Wav
if (extension.Equals(".mp3", StringComparison.InvariantCultureIgnoreCase))
{
ActiveStream = new Mp3FileReader(path);
inputStream = new WaveChannel32(ActiveStream);
sampleAggregator = new SampleAggregator(fftDataSize);
inputStream.Sample += inputStream_Sample;
waveOutDevice.Init(inputStream);
ChannelLength = inputStream.TotalTime.TotalSeconds;
//FileTag = TagLib.File.Create(path); FileTag获取专辑图片，不需要专辑图片
//GenerateWaveformData(path);
CanPlay = true;
}
else if (extension.Equals(".wav", StringComparison.InvariantCultureIgnoreCase))
{
ActiveStream = new WaveFileReader(path);
inputStream = new WaveChannel32(ActiveStream);
sampleAggregator = new SampleAggregator(fftDataSize);
inputStream.Sample += inputStream_Sample;
waveOutDevice.Init(inputStream);
ChannelLength = inputStream.TotalTime.TotalSeconds;
//FileTag = TagLib.File.Create(path); FileTag获取专辑图片，不需要专辑图片
//GenerateWaveformData(path);
CanPlay = true;
}
//ActiveStream = new Mp3FileReader(path);
//inputStream = new WaveChannel32(ActiveStream);
//sampleAggregator = new SampleAggregator(fftDataSize);
//inputStream.Sample += inputStream_Sample;
//waveOutDevice.Init(inputStream);
//ChannelLength = inputStream.TotalTime.TotalSeconds;
////FileTag = TagLib.File.Create(path); FileTag获取专辑图片，不需要专辑图片
//GenerateWaveformData(path);
//CanPlay = true;
}
catch
{
ActiveStream = null;
CanPlay = false;
}
}
}
private void waveformGenerateWorker_DoWork(object sender, DoWorkEventArgs e)
{
WaveformGenerationParams waveformParams = e.Argument as WaveformGenerationParams;
//var extension = Path.GetExtension(waveformParams.Path);
//if (extension == null)
//{
// Debug.WriteLine(string.Format("只能播放有标准后缀名的文件，此文件{0}不标准", path));
// return;
//}
////判断是MP3文件还是Wav
//if (extension.Equals(".mp3", StringComparison.InvariantCultureIgnoreCase))
//{
// ActiveStream = new Mp3FileReader(waveformParams.Path);
// inputStream = new WaveChannel32(ActiveStream);
// sampleAggregator = new SampleAggregator(fftDataSize);
// inputStream.Sample += inputStream_Sample;
// waveOutDevice.Init(inputStream);
// ChannelLength = inputStream.TotalTime.TotalSeconds;
// //FileTag = TagLib.File.Create(path); FileTag获取专辑图片，不需要专辑图片
// GenerateWaveformData(waveformParams.Path);
// CanPlay = true;
//}
//else if (extension.Equals(".wav", StringComparison.InvariantCultureIgnoreCase))
//{
// ActiveStream = new WaveFileReader(waveformParams.Path);
// inputStream = new WaveChannel32(ActiveStream);
// sampleAggregator = new SampleAggregator(fftDataSize);
// inputStream.Sample += inputStream_Sample;
// waveOutDevice.Init(inputStream);
// ChannelLength = inputStream.TotalTime.TotalSeconds;
// //FileTag = TagLib.File.Create(path); FileTag获取专辑图片，不需要专辑图片
// GenerateWaveformData(waveformParams.Path);
// CanPlay = true;
//}
WaveFileReader waveformMp3Stream = new WaveFileReader(waveformParams.Path);
WaveChannel32 waveformInputStream = new WaveChannel32(waveformMp3Stream);
waveformInputStream.Sample += waveStream_Sample;
int frameLength = fftDataSize;
int frameCount = (int)((double)waveformInputStream.Length / (double)frameLength);
int waveformLength = frameCount * 2;
byte[] readBuffer = new byte[frameLength];
waveformAggregator = new SampleAggregator(frameLength);
float maxLeftPointLevel = float.MinValue;
float maxRightPointLevel = float.MinValue;
int currentPointIndex = 0;
float[] waveformCompressedPoints = new float[waveformParams.Points];
List <float> waveformData = new List <float>();
List <int> waveMaxPointIndexes = new List <int>();
for (int i = 1; i <= waveformParams.Points; i++)
{
waveMaxPointIndexes.Add((int)Math.Round(waveformLength * ((double)i / (double)waveformParams.Points), 0));
}
int readCount = 0;
while (currentPointIndex * 2 < waveformParams.Points)
{
waveformInputStream.Read(readBuffer, 0, readBuffer.Length);
waveformData.Add(waveformAggregator.LeftMaxVolume);
waveformData.Add(waveformAggregator.RightMaxVolume);
if (waveformAggregator.LeftMaxVolume > maxLeftPointLevel)
{
maxLeftPointLevel = waveformAggregator.LeftMaxVolume;
}
if (waveformAggregator.RightMaxVolume > maxRightPointLevel)
{
maxRightPointLevel = waveformAggregator.RightMaxVolume;
}
if (readCount > waveMaxPointIndexes[currentPointIndex])
{
waveformCompressedPoints[(currentPointIndex * 2)] = maxLeftPointLevel;
waveformCompressedPoints[(currentPointIndex * 2) + 1] = maxRightPointLevel;
maxLeftPointLevel = float.MinValue;
maxRightPointLevel = float.MinValue;
currentPointIndex++;
}
if (readCount % 3000 == 0)
{
float[] clonedData = (float[])waveformCompressedPoints.Clone();
App.Current.Dispatcher.Invoke(new Action(() =>
{
WaveformData = clonedData;
}));
}
if (waveformGenerateWorker.CancellationPending)
{
e.Cancel = true;
break;
}
readCount++;
}
float[] finalClonedData = (float[])waveformCompressedPoints.Clone();
App.Current.Dispatcher.Invoke(new Action(() =>
{
fullLevelData = waveformData.ToArray();
WaveformData = finalClonedData;
}));
waveformInputStream.Close();
waveformInputStream.Dispose();
waveformInputStream = null;
waveformMp3Stream.Close();
waveformMp3Stream.Dispose();
waveformMp3Stream = null;
}