During stream playback at the moment of changing the track on the radio, new meta data is captured (Artist and Track name), how to display them in the Label ( textbox , etc.) by the method, rather than pressing the Play button.

using CSharp_Bass_Console; using System; using System.Collections.Generic; using System.ComponentModel; using System.Diagnostics; using System.Windows; using System.Windows.Interop; using System.Windows.Threading; using Un4seen.Bass; using Un4seen.Bass.AddOn.Tags; namespace BandedSpectrumAnalyzer { public class BassEngine : INotifyPropertyChanged, ISpectrumPlayer { #region Переменные public int Bitrate; ///Битрейт public int freq; ///Частота дискретизации public string Channel; ///Информация Канала public string Artist; ///Исполнитель public string Title; ///Трек public string Year; ///Год выпуска трека public string NameStation; ///Радиостанция Dictionary<int, string> ChannelsDict = new Dictionary<int, string>() { {0, "Null"}, {1, "Mono"}, {2, "Stereo"} }; ///Частота дискретизации private static BassEngine instance; ///Singleton Instance (Чтобы класс BassEngene стал доступен в MainWindow ) public int Stream; ///Поток private bool isPlaying; ///Проигрывается private int maxFFT = (int)(BASSData.BASS_DATA_AVAILABLE | BASSData.BASS_DATA_FFT4096); ///Глубина анализа потока private int sampleFrequency = 44100; ///Частота дискретизации потока public static int volume; ///Громкость private TAG_INFO tagInfo; private SYNCPROC mySync, mySyncEnd; #endregion public event PropertyChangedEventHandler PropertyChanged; public event EventHandler<RPTagsChangedEventArgs> TagsChanged; public event EventHandler EndStream; public BassEngine() ///Конструктор { Initialize(); mySync = new SYNCPROC(MetaSync); mySyncEnd = new SYNCPROC(SyncEnd); } private void MetaSync(int handle, int channel, int data, IntPtr user) { OnTagsChanged(handle, channel, data, user); GetTagsFromURLStream(); } private void SyncEnd(int handle, int channel, int data, IntPtr user) { OnEndStream(); GetTagsFromURLStream(); } public TAG_INFO TagInfo { get; private set; } public void OnTagsChanged(int handle, int channel, int data, IntPtr user) { EventHandler<RPTagsChangedEventArgs> handler = TagsChanged; if (handler != null) { GetTagsFromURLStream(); handler(this, new RPTagsChangedEventArgs(TagInfo, handle, channel, data, user)); } } private void OnEndStream() { GetTagsFromURLStream(); EndStream?.Invoke(this, new EventArgs()); } public static BassEngine Instance ///Singleton Instance { get { if (instance == null) instance = new BassEngine(); return instance; } } public void Play(string url, int volume) { if (ActiveStreamHandle != 0) Bass.BASS_StreamFree(ActiveStreamHandle); Stream = Bass.BASS_StreamCreateURL(url, 0, BASSFlag.BASS_DEFAULT, null, IntPtr.Zero); ActiveStreamHandle = Stream; IsPlaying = true; PlayCurrentStream(); Bass.BASS_ChannelSetSync(Stream, BASSSync.BASS_SYNC_META, 0, mySync, IntPtr.Zero); Bass.BASS_ChannelSetSync(Stream, BASSSync.BASS_SYNC_META, 0, mySyncEnd, IntPtr.Zero); GetTagsFromURLStream(); } public void Stop() { if (ActiveStreamHandle != 0) { Bass.BASS_ChannelStop(ActiveStreamHandle); } IsPlaying = false; } void GetTagsFromURLStream() { TAG_INFO tagInfo = new TAG_INFO(); Bass.BASS_ChannelGetTags(Stream, BASSTag.BASS_TAG_META); BassTags.BASS_TAG_GetFromURL(Stream, tagInfo); TagInfo = tagInfo; NameStation = TagInfo.album; Artist = TagInfo.artist; Title = TagInfo.title; } public static void SetVolumeToStream(int stream, int vol) { volume = vol; Bass.BASS_ChannelSetAttribute(stream, BASSAttribute.BASS_ATTRIB_VOL, volume / 100F); } private void Initialize() { IsPlaying = false; Window mainWindow = Application.Current.MainWindow; WindowInteropHelper interopHelper = new WindowInteropHelper(mainWindow); if (Bass.BASS_Init(-1, 44100, BASSInit.BASS_DEVICE_SPEAKERS, interopHelper.Handle)) { BASS_INFO info = new BASS_INFO(); Bass.BASS_GetInfo(info); } else { MessageBox.Show(mainWindow, "Bass initialization error!"); mainWindow.Close(); } } private void PlayCurrentStream() { Window mainWindow = Application.Current.MainWindow; WindowInteropHelper interopHelper = new WindowInteropHelper(mainWindow); // Play Stream if (ActiveStreamHandle != 0 && Bass.BASS_ChannelPlay(ActiveStreamHandle, false)) { BASS_CHANNELINFO info = new BASS_CHANNELINFO(); Bass.BASS_ChannelGetInfo(ActiveStreamHandle, info); sampleFrequency = info.freq; Bass.BASS_ChannelSetAttribute(Stream, BASSAttribute.BASS_ATTRIB_VOL, volume / 100F); } else { MessageBox.Show(mainWindow, "Что-то пошло не так"); mainWindow.Close(); } } private void NotifyPropertyChanged(String info) { PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(info)); } public int ActiveStreamHandle { get { return Stream; } protected set { int oldValue = Stream; Stream = value; if (oldValue != Stream) NotifyPropertyChanged("ActiveStreamHandle"); } } public bool IsPlaying { get { return isPlaying; } protected set { bool oldValue = isPlaying; isPlaying = value; if (oldValue != isPlaying) NotifyPropertyChanged("IsPlaying"); } } public int GetFFTFrequencyIndex(int frequency) { return Utils.FFTFrequency2Index(frequency, 4096, sampleFrequency); } public int GetFFTData(float[] fftDataBuffer) { return Bass.BASS_ChannelGetData(ActiveStreamHandle, fftDataBuffer, maxFFT); } } }

MainWindow.xaml.cs

 using System; using System.Collections.Generic; using System.Diagnostics; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Windows; using System.Windows.Controls; using System.Windows.Data; using System.Windows.Documents; using System.Windows.Input; using System.Windows.Media; using System.Windows.Media.Imaging; using System.Windows.Navigation; using System.Windows.Shapes; using BandedSpectrumAnalyzer; using System.Windows.Controls.Primitives; using Just_me_default; namespace Just_me { public partial class MainWindow : Window { private string url; #region Dependency Properties public static readonly DependencyProperty ScaleValueProperty = DependencyProperty.Register("ScaleValue", typeof(double), typeof(MainWindow), new UIPropertyMetadata(1.0d, new PropertyChangedCallback(OnScaleValueChanged))); private static void OnScaleValueChanged(DependencyObject o, DependencyPropertyChangedEventArgs e) { MainWindow mainWindow = o as MainWindow; if (mainWindow != null) mainWindow.OnScaleValueChanged((double)e.OldValue, (double)e.NewValue); } protected virtual void OnScaleValueChanged(double oldValue, double newValue) { } public double ScaleValue { // IMPORTANT: To maintain parity between setting a property in XAML and procedural code, do not touch the getter and setter inside this dependency property! get { return (double)GetValue(ScaleValueProperty); } set { SetValue(ScaleValueProperty, value); } } public string Album { get; private set; } public string Artist { get; private set; } #endregion public MainWindow() { InitializeComponent(); BassEngine bassEngine = BassEngine.Instance; /// UIHelper.Bind(bassEngine, "CanStop", StopButton, Button.IsEnabledProperty); spectrumAnalyzer.RegisterSoundPlayer(bassEngine); } private void Hyperlink_RequestNavigate_1(object sender, RequestNavigateEventArgs e) { Process.Start((sender as Hyperlink).NavigateUri.ToString()); e.Handled = true; } private void TagINFO() { NameStation.Content = BassEngine.Instance.NameStation; artist.Content = BassEngine.Instance.Artist; title.Content = BassEngine.Instance.Title; } #region Button Station private void record_chill_out(object sender, RoutedEventArgs e) { url = "http://air2.radiorecord.ru:805/chil_320"; BassEngine.Instance.Play(url, BassEngine.volume); TagINFO(); } private void megamix(object sender, RoutedEventArgs e) { url = "http://air2.radiorecord.ru:805/mix_320"; BassEngine.Instance.Play(url, BassEngine.volume); TagINFO(); } private void pirate_station(object sender, RoutedEventArgs e) { url = "http://air2.radiorecord.ru:805/ps_320"; BassEngine.Instance.Play(url, BassEngine.volume); TagINFO(); } private void pump(object sender, RoutedEventArgs e) { url = "http://air2.radiorecord.ru:805/pump_320"; BassEngine.Instance.Play(url, BassEngine.volume); TagINFO(); } private void rave_fm(object sender, RoutedEventArgs e) { url = "http://air2.radiorecord.ru:805/rave_320"; BassEngine.Instance.Play(url, BassEngine.volume); TagINFO(); } private void record_breaks(object sender, RoutedEventArgs e) { url = "http://air2.radiorecord.ru:805/brks_320"; BassEngine.Instance.Play(url, BassEngine.volume); TagINFO(); } private void record_deep(object sender, RoutedEventArgs e) { url = "http://air2.radiorecord.ru:805/deep_320"; BassEngine.Instance.Play(url, BassEngine.volume); TagINFO(); } private void radio_record(object sender, RoutedEventArgs e) { url = "http://air2.radiorecord.ru:805/rr_320"; BassEngine.Instance.Play(url, BassEngine.volume); TagINFO(); } private void record_techno(object sender, RoutedEventArgs e) { url = "http://air2.radiorecord.ru:805/techno_320"; BassEngine.Instance.Play(url, BassEngine.volume); TagINFO(); } private void russian_mix(object sender, RoutedEventArgs e) { url = "http://air2.radiorecord.ru:805/rus_320"; BassEngine.Instance.Play(url, BassEngine.volume); TagINFO(); } private void trance_mission(object sender, RoutedEventArgs e) { url = "http://air2.radiorecord.ru:805/tm_320"; BassEngine.Instance.Play(url, BassEngine.volume); TagINFO(); } private void wkns(object sender, RoutedEventArgs e) { url = "http://wknc.sma.ncsu.edu:8000/wknchq.ogg"; BassEngine.Instance.Play(url, BassEngine.volume); TagINFO(); } private void vip_house(object sender, RoutedEventArgs e) { url = "http://air2.radiorecord.ru:805/vip_320"; BassEngine.Instance.Play(url, BassEngine.volume); TagINFO(); } private void yo_fm(object sender, RoutedEventArgs e) { url = "http://air2.radiorecord.ru:805/yo_320"; BassEngine.Instance.Play(url, BassEngine.volume); TagINFO(); } private void record_dubstep(object sender, RoutedEventArgs e) { url = "http://air2.radiorecord.ru:805/dub_320"; BassEngine.Instance.Play(url, BassEngine.volume); TagINFO(); } private void record_edm(object sender, RoutedEventArgs e) { url = "http://air2.radiorecord.ru:805/club_320"; BassEngine.Instance.Play(url, BassEngine.volume); TagINFO(); } private void future_house(object sender, RoutedEventArgs e) { url = "http://air2.radiorecord.ru:805/fut_320"; BassEngine.Instance.Play(url, BassEngine.volume); TagINFO(); } private void record_trap(object sender, RoutedEventArgs e) { url = "http://air2.radiorecord.ru:805/trap_320"; BassEngine.Instance.Play(url, BassEngine.volume); TagINFO(); } private void minimal_tech(object sender, RoutedEventArgs e) { url = "http://air2.radiorecord.ru:805/mini_320"; BassEngine.Instance.Play(url, BassEngine.volume); TagINFO(); } private void gop_fm(object sender, RoutedEventArgs e) { url = "http://air2.radiorecord.ru:805/gop_320"; BassEngine.Instance.Play(url, BassEngine.volume); TagINFO(); } #endregion private void SliderVolume(object sender, RoutedPropertyChangedEventArgs<double> e) { BassEngine.SetVolumeToStream(BassEngine.Instance.ActiveStreamHandle, Convert.ToInt32(SlVolume.Value)); } private void r(object sender, DependencyPropertyChangedEventArgs e) { this.NameStation.Focus(); } } }
  • And what is the fundamental difference, to display at the touch of a button or for some other reason? - VladD
  • The fact is that after synchronization of tags the string artist has a new meaning (the new performer started playing), and how to report it in the Textbox if it got its value as an artist when we clicked on the desired station. Those. The textbox does not know that a new value has come until we press the button again - Tafaube
  • Well, great, but what is the difficulty to bring in the Textbox at the right time, after updating the artist, and not at the touch of a button? - VladD
  • I do not know what and where to write. If you write in the class where the delegate is called, from there you cannot call the object to which it is assigned. Can you give an example? - Tafaube
  • Try adding a timer that will update the tags at regular intervals during the composition. - Kibnet Philosoff

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