Stream Configuration

interface StreamConfig {
  dispatcherConfig: CreateStreamOps;
  playerConfig: ResourcePlayOptions;
}

interface CreateStreamOps {
  type?: StreamType;
  data: Track;
  
  // Feature toggles
  disableVolume?: boolean;
  disableEqualizer?: boolean;
  disableBiquad?: boolean;
  disableCompressor?: boolean;
  disableResampler?: boolean;
  disableReverb?: boolean;
  disableSeeker?: boolean;
  disableFilters?: boolean;
  skipFFmpeg?: boolean;
  
  // Audio processing
  eq?: EqualizerBand[];
  biquadFilter?: BiquadFilters;
  defaultFilters?: PCMFilters[];
  volume?: number;
  sampleRate?: number;
  sampleRateFilters?: CommonResamplerFilterPreset;
  
  // Advanced effects
  compressor?: {
    threshold: number;
    ratio: number;
    attack: number;
    release: number;
    makeupGain: number;
    kneeWidth: number;
  };
  reverb?: {
    roomSize: number;
    damping: number;
    wetLevel: number;
    dryLevel: number;
  };
  seeker?: {
    seekTarget: number | null;
    totalDuration: number;
  };
}

const queue = player.queues.create(guild, {
  disableVolume: false,      // Enable volume control
  disableEqualizer: false,   // Enable 15-band EQ
  disableBiquad: false,      // Enable biquad filters
  disableFilterer: false,    // Enable PCM filters
  disableResampler: false,   // Enable sample rate conversion
  disableCompressor: false,  // Enable dynamic range compression
  disableReverb: false,      // Enable reverb effect
  disableSeeker: false       // Enable precise seeking
});

const player = new Player(client, {
  skipFFmpeg: true  // Skip FFmpeg when possible for better performance
});

const queue = player.queues.create(guild);
// FFmpeg only used when filters are applied

interface CompressorParameters {
  threshold: number;   // dB threshold (-100 to 0)
  ratio: number;       // Compression ratio (1 to 20)
  attack: number;      // Attack time in ms
  release: number;     // Release time in ms
  makeupGain: number;  // Output gain in dB
  kneeWidth: number;   // Soft knee width in dB
}

player.events.on('willPlayTrack', (queue, track, config, resolve) => {
  config.dispatcherConfig.compressor = {
    threshold: -24,      // Compress above -24dB
    ratio: 4,            // 4:1 compression ratio
    attack: 5,           // 5ms attack
    release: 50,         // 50ms release
    makeupGain: 6,       // +6dB makeup gain
    kneeWidth: 6         // 6dB soft knee
  };
  
  resolve();
});

// Gentle compression
const gentleCompressor = {
  threshold: -20,
  ratio: 2,
  attack: 10,
  release: 100,
  makeupGain: 3,
  kneeWidth: 6
};

// Heavy compression
const heavyCompressor = {
  threshold: -30,
  ratio: 8,
  attack: 2,
  release: 30,
  makeupGain: 12,
  kneeWidth: 3
};

// Broadcast limiter
const limiter = {
  threshold: -6,
  ratio: 20,
  attack: 0.5,
  release: 10,
  makeupGain: 0,
  kneeWidth: 0
};

interface ReverbParameters {
  roomSize: number;    // Room size (0.0 to 1.0)
  damping: number;     // High frequency damping (0.0 to 1.0)
  wetLevel: number;    // Reverb level (0.0 to 1.0)
  dryLevel: number;    // Direct signal level (0.0 to 1.0)
}

player.events.on('willPlayTrack', (queue, track, config, resolve) => {
  config.dispatcherConfig.reverb = {
    roomSize: 0.5,     // Medium room
    damping: 0.5,      // Moderate damping
    wetLevel: 0.33,    // 33% reverb
    dryLevel: 0.4      // 40% dry signal
  };
  
  resolve();
});

// Small room
const smallRoom = {
  roomSize: 0.2,
  damping: 0.7,
  wetLevel: 0.2,
  dryLevel: 0.8
};

// Large hall
const largeHall = {
  roomSize: 0.9,
  damping: 0.3,
  wetLevel: 0.5,
  dryLevel: 0.5
};

// Cathedral
const cathedral = {
  roomSize: 1.0,
  damping: 0.2,
  wetLevel: 0.6,
  dryLevel: 0.4
};

// Plate reverb
const plate = {
  roomSize: 0.5,
  damping: 0.6,
  wetLevel: 0.4,
  dryLevel: 0.6
};

const queue = player.queues.create(guild, {
  resampler: 44100  // Convert to 44.1kHz
});

interface ResampleParameters {
  inputSampleRate: number;   // Source sample rate (usually 48000)
  targetSampleRate: number;  // Target sample rate
  disabled?: boolean;
}

interface SeekerParameters {
  seekTarget: number | null;    // Target position in ms
  totalDuration: number;         // Total track duration
  sampleRate: number;            // Sample rate (48000)
  channels: number;              // Channel count (2)
  disabled?: boolean;
}

config.dispatcherConfig.seeker = {
  seekTarget: options.transitionMode && options.seek != null
    ? options.seek
    : null,
  totalDuration: track.durationMS ?? 0
};

type BiquadFilters = 
  | 'lowpass'      // Low-pass filter
  | 'highpass'     // High-pass filter
  | 'bandpass'     // Band-pass filter
  | 'notch'        // Notch filter
  | 'allpass'      // All-pass filter
  | 'peaking'      // Peaking EQ
  | 'lowshelf'     // Low shelf
  | 'highshelf';   // High shelf

interface BiquadSetFilterProps {
  f0: number;    // Center frequency in Hz
  fs: number;    // Sample rate
  Q: number;     // Quality factor
  gain?: number; // Gain in dB (for peaking, shelves)
}

// Apply low-pass filter at 5000 Hz
queue.filters.biquad?.setFilter('lowpass', {
  f0: 5000,
  fs: 48000,
  Q: 0.707
});

// Apply peaking EQ at 1000 Hz with +6dB gain
queue.filters.biquad?.setFilter('peaking', {
  f0: 1000,
  fs: 48000,
  Q: 1.0,
  gain: 6
});

player.events.on('willPlayTrack', (queue, track, config, resolve) => {
  // Modify dispatcher config
  config.dispatcherConfig.volume = 80;
  config.dispatcherConfig.eq = EqualizerConfigurationPreset.Rock;
  config.dispatcherConfig.compressor = {
    threshold: -24,
    ratio: 4,
    attack: 5,
    release: 50,
    makeupGain: 6,
    kneeWidth: 6
  };
  
  // Modify player config
  config.playerConfig.seek = 30000; // Start at 30 seconds
  
  // Must call resolve when done
  resolve();
});

player.events.on('willPlayTrack', async (queue, track, config, resolve) => {
  // Load saved settings
  const settings = await loadUserSettings(queue.guild.id);
  
  config.dispatcherConfig.volume = settings.volume;
  config.dispatcherConfig.eq = settings.eqPreset;
  
  resolve();
});

interface ResourcePlayOptions {
  queue?: boolean;          // Add to queue instead of playing
  seek?: number;            // Seek to position in ms
  transitionMode?: boolean; // Smooth transition mode
}

// Play with seek
await queue.node.play(track, {
  queue: false,
  seek: 60000  // Start at 1 minute
});

// Add to queue
await queue.node.play(track, {
  queue: true
});

// Smooth transition (used internally for filters)
await queue.node.play(track, {
  transitionMode: true,
  seek: queue.node.playbackTime
});

const stream = dsp.create(source, {
  // PCM Filters
  dsp: {
    filters: config.defaultFilters,
    disabled: config.disableFilters
  },
  
  // Biquad Filtering
  biquad: config.biquadFilter ? {
    filter: config.biquadFilter,
    disabled: config.disableBiquad
  } : undefined,
  
  // Sample Rate Conversion
  resampler: config.sampleRate ? {
    inputSampleRate: 48000,
    targetSampleRate: config.sampleRate,
    disabled: config.disableResampler
  } : undefined,
  
  // 15-band Equalizer
  equalizer: {
    bandMultiplier: config.eq,
    disabled: config.disableEqualizer
  },
  
  // Volume Control
  volume: {
    volume: config.volume,
    disabled: config.disableVolume
  },
  
  // Dynamic Range Compression
  compressor: config.compressor ? {
    threshold: config.compressor.threshold,
    ratio: config.compressor.ratio,
    attack: config.compressor.attack,
    release: config.compressor.release,
    makeupGain: config.compressor.makeupGain,
    kneeWidth: config.compressor.kneeWidth,
    disabled: config.disableCompressor
  } : undefined,
  
  // Reverb Effect
  reverb: config.reverb ? {
    roomSize: config.reverb.roomSize,
    damping: config.reverb.damping,
    wetLevel: config.reverb.wetLevel,
    dryLevel: config.reverb.dryLevel,
    disabled: config.disableReverb
  } : undefined,
  
  // PCM Seeking
  seeker: config.seeker ? {
    disabled: config.disableSeeker,
    seekTarget: config.seeker.seekTarget,
    sampleRate: 48000,
    channels: 2,
    totalDuration: config.seeker.totalDuration
  } : undefined
});

queue.on('dsp', (filters: PCMFilters[]) => {
  console.log('DSP filters updated:', filters);
});

queue.on('biquad', (filter: BiquadFilters) => {
  console.log('Biquad filter:', filter);
});

queue.on('compressor', (params: CompressorParameters) => {
  console.log('Compressor:', params);
});

queue.on('reverb', (params: ReverbParameters) => {
  console.log('Reverb:', params);
});

queue.on('sampleRate', (params: ResampleParameters) => {
  console.log('Sample rate:', params);
});

queue.on('seeker', (params: SeekerParameters) => {
  console.log('Seeker:', params);
});

import { Player, EqualizerConfigurationPreset } from 'discord-player';

const player = new Player(client, {
  skipFFmpeg: true
});

const queue = player.queues.create(guild, {
  volume: 80,
  disableVolume: false,
  disableEqualizer: false,
  disableCompressor: false,
  disableReverb: false
});

player.events.on('willPlayTrack', (queue, track, config, resolve) => {
  // Configure all audio processing
  config.dispatcherConfig.volume = 80;
  config.dispatcherConfig.eq = EqualizerConfigurationPreset.Rock;
  config.dispatcherConfig.biquadFilter = 'lowpass';
  
  config.dispatcherConfig.compressor = {
    threshold: -24,
    ratio: 4,
    attack: 5,
    release: 50,
    makeupGain: 6,
    kneeWidth: 6
  };
  
  config.dispatcherConfig.reverb = {
    roomSize: 0.5,
    damping: 0.5,
    wetLevel: 0.3,
    dryLevel: 0.7
  };
  
  config.dispatcherConfig.sampleRate = 48000;
  
  resolve();
});