コード例 #1
0
        public void OpenFile(string path = "")
        {
            if (useGlobal)
            {
                if (LoadedPath == null)
                {
                    return;
                }
                path = LoadedPath;
            }
            if (!useGlobal)
            {
                LoadedPath = 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
                    };
                    ActiveStream        = useGlobal ? LoadedSong.RawStream : 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);
                    GenerateWaveformData(path);
                    CanPlay = true;
                }
                catch
                {
                    ActiveStream = null;
                    CanPlay      = false;
                }
            }
        }
コード例 #2
0
        private void waveformGenerateWorker_DoWork(object sender, DoWorkEventArgs e)
        {
            var song = useGlobal ? LoadedSong : new Song(e.Argument as WaveformGenerationParams);

            if (!useGlobal)
            {
                LoadedSong = song;
                HasLoaded  = true;
            }

            var wfParams = song.WfParams;
            var stream   = useGlobal ? song.RawStream : song.Mp3Stream;

            var waveformInputStream = new WaveChannel32(stream);

            waveformInputStream.Sample += waveStream_Sample;

            int frameLength    = fftDataSize;
            int frameCount     = (int)(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[wfParams.Points];
            List <float> waveformData             = new List <float>();
            List <int>   waveMaxPointIndexes      = new List <int>();

            for (int i = 1; i <= wfParams.Points; i++)
            {
                waveMaxPointIndexes.Add((int)Math.Round(waveformLength * ((double)i / (double)wfParams.Points), 0));
            }

            int readCount = 0;

            while (currentPointIndex * 2 < wfParams.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;
            }));
        }