# mixer_widget.py from PySide6.QtWidgets import ( QWidget, QVBoxLayout, QHBoxLayout, QLabel, QSlider, QPushButton, QFrame, QScrollArea, QDial, QSizePolicy, QInputDialog ) from PySide6.QtCore import Qt, QTimer, QSize from PySide6.QtGui import QFont, QPainter, QColor, QLinearGradient, QPen from audio_engine import NUM_MIXER_CHANNELS from icons import icon_mute, icon_solo import math class VUMeter(QWidget): def __init__(self, parent=None): super().__init__(parent) self._value = 0.0 self.setMinimumWidth(28) self.setMinimumHeight(80) def set_value(self, value: float): self._value = max(0.0, min(1.0, value)) self.update() def paintEvent(self, event): painter = QPainter(self) painter.setRenderHint(QPainter.Antialiasing) rect = self.rect().adjusted(18, 3, -3, -3) if rect.width() < 1 or rect.height() < 1: painter.end() return painter.fillRect(rect, QColor("#080808")) db_markings = [(-40,), (-30,), (-20,), (-12,), (-6,), (0,)] for (db,) in db_markings: pct = (db + 46) / 46.0 if db <= 0 else 1.0 pct = max(0.0, min(1.0, pct)) y = rect.bottom() - int(rect.height() * pct) if db == -6: painter.setPen(QPen(QColor("#00ff88"), 2)) painter.drawLine(rect.right() - 3, y, rect.right(), y) painter.setFont(QFont("Segoe UI", 8, QFont.Bold)) painter.setPen(QPen(QColor("#ffffff"), 1)) else: painter.setPen(QPen(QColor("#2a2a2a"), 1)) painter.drawLine(rect.right() - 5, y, rect.right(), y) painter.setPen(QPen(QColor("#cccccc"), 1)) painter.setFont(QFont("Segoe UI", 7)) painter.drawText(rect.left() - 16, y + 3, f"{db}") painter.setPen(QPen(QColor("#1a1a1a"), 1)) painter.drawRect(rect) val = self._value if val < 1e-10: painter.end() return gradient = QLinearGradient(0, rect.bottom(), 0, rect.top()) gradient.setColorAt(0.0, QColor("#003300")) gradient.setColorAt(0.5, QColor("#00cc00")) gradient.setColorAt(0.75, QColor("#cccc00")) gradient.setColorAt(0.9, QColor("#ff6600")) gradient.setColorAt(1.0, QColor("#ff0000")) db = -46 * (1 - val) if val < 1.0 else 3 fill_pct = (db + 46) / 49.0 if db <= 0 else 1.0 fill_pct = max(0.0, min(1.0, fill_pct)) fill_pct = math.sqrt(fill_pct) fill_h = int(rect.height() * fill_pct) painter.fillRect(rect.x(), rect.bottom() - fill_h, rect.width(), fill_h, gradient) for (db,) in db_markings: pct = (db + 46) / 46.0 if db <= 0 else 1.0 pct = max(0.0, min(1.0, pct)) y = rect.bottom() - int(rect.height() * pct) painter.setPen(QPen(QColor("#000000"), 1)) painter.drawLine(rect.x(), y, rect.right(), y) painter.end() class ChannelStrip(QFrame): def __init__(self, engine, channel_index, parent=None): super().__init__(parent) self.engine = engine self.channel_index = channel_index self._channel = engine.get_channel(channel_index) self.setFixedWidth(90) self.setSizePolicy(QSizePolicy.Fixed, QSizePolicy.Expanding) self.setStyleSheet(""" ChannelStrip { background-color: #181a1e; border: 1px solid #282a30; border-radius: 6px; } """) self._build_ui() self._connect_signals() self.timer = QTimer(self) self.timer.setInterval(30) self.timer.timeout.connect(self._refresh) self.timer.start() def _build_ui(self): root = QVBoxLayout(self) root.setContentsMargins(4, 6, 4, 6) root.setSpacing(4) self.name_btn = QPushButton(self._channel.name) self.name_btn.setFont(QFont("Segoe UI", 8, QFont.Bold)) self.name_btn.setStyleSheet(""" QPushButton { background-color: transparent; color: #999aaa; border: none; padding: 2px; font-size: 8pt; } QPushButton:hover { color: #ffffff; background-color: #22252c; border-radius: 3px; } """) root.addWidget(self.name_btn) meter_row = QHBoxLayout() meter_row.setSpacing(2) self.vu_meter = VUMeter() meter_row.addWidget(self.vu_meter, stretch=1) self.volume_slider = QSlider(Qt.Vertical) self.volume_slider.setRange(0, 100) self.volume_slider.setValue(int(math.sqrt(self._channel.volume) * 100)) self.volume_slider.setStyleSheet(""" QSlider::groove:vertical { background: #22242a; width: 4px; border-radius: 2px; } QSlider::handle:vertical { background: #8890a0; height: 12px; width: 14px; margin: -4px -5px; border-radius: 2px; } QSlider::handle:vertical:hover { background: #b0b8c8; } QSlider::add-page:vertical { background: qlineargradient(x1:0, y1:0, x2:0, y2:1, stop:0 #00cc66, stop:1 #008844); border-radius: 2px; } QSlider::sub-page:vertical { background: transparent; border-radius: 2px; } """) meter_row.addWidget(self.volume_slider, stretch=1) root.addLayout(meter_row, stretch=1) btn_row = QHBoxLayout() btn_row.setSpacing(3) self.mute_btn = QPushButton() self.mute_btn.setFixedSize(28, 24) self.mute_btn.setIconSize(QSize(16, 16)) self.mute_btn.setIcon(icon_mute()) self.mute_btn.setCheckable(True) self.mute_btn.setToolTip("Mute") self.mute_btn.setStyleSheet(""" QPushButton { background-color: #242026; border: 1px solid #3a303a; border-radius: 3px; } QPushButton:checked { background-color: #4a1a1a; border: 1px solid #ff4444; } QPushButton:hover { background-color: #343036; } """) btn_row.addWidget(self.mute_btn) self.solo_btn = QPushButton() self.solo_btn.setFixedSize(28, 24) self.solo_btn.setIconSize(QSize(16, 16)) self.solo_btn.setIcon(icon_solo()) self.solo_btn.setCheckable(True) self.solo_btn.setToolTip("Solo") self.solo_btn.setStyleSheet(""" QPushButton { background-color: #262420; border: 1px solid #3a3830; border-radius: 3px; } QPushButton:checked { background-color: #4a4a1a; border: 1px solid #ffaa00; } QPushButton:hover { background-color: #363430; } """) btn_row.addWidget(self.solo_btn) self.pfl_btn = QPushButton("PFL") self.pfl_btn.setFixedSize(28, 24) self.pfl_btn.setFont(QFont("Segoe UI", 7, QFont.Bold)) self.pfl_btn.setCheckable(True) self.pfl_btn.setToolTip("Pre-Fader Listen") self.pfl_btn.setStyleSheet(""" QPushButton { background-color: #202426; border: 1px solid #303a3a; border-radius: 3px; color: #668; } QPushButton:checked { background-color: #1a3a4a; border: 1px solid #00aaff; color: #00ccff; } QPushButton:hover { background-color: #303436; } """) btn_row.addWidget(self.pfl_btn) root.addLayout(btn_row) def _connect_signals(self): self.name_btn.clicked.connect(self._rename) self.volume_slider.valueChanged.connect(self._on_volume_changed) self.mute_btn.toggled.connect(self._on_mute_toggled) self.solo_btn.toggled.connect(self._on_solo_toggled) self.pfl_btn.toggled.connect(self._on_pfl_toggled) def _rename(self): name, ok = QInputDialog.getText( self, "Rename Channel", "Channel name:", text=self._channel.name ) if ok and name.strip(): self._channel.name = name.strip() self.name_btn.setText(self._channel.name) def _on_volume_changed(self, value: int): vol = (value / 100.0) ** 2 self.engine.set_channel_volume(self.channel_index, vol) def _on_mute_toggled(self, checked: bool): self.engine.set_channel_mute(self.channel_index, checked) def _on_solo_toggled(self, checked: bool): self.engine.set_channel_solo(self.channel_index, checked) def _on_pfl_toggled(self, checked: bool): self.engine.set_channel_pfl(self.channel_index, checked) def _refresh(self): self.vu_meter.set_value(self._channel.vu_peak) self.volume_slider.setValue(int(math.sqrt(self._channel.volume) * 100)) class MasterPreSection(QFrame): def __init__(self, engine, parent=None): super().__init__(parent) self.engine = engine self._master = engine.mixer['master'] self.setFixedWidth(80) self.setSizePolicy(QSizePolicy.Fixed, QSizePolicy.Expanding) self.setStyleSheet(""" MasterPreSection { background-color: #101216; border: 1px solid #1e2026; border-radius: 6px; } """) self._build_ui() self.timer = QTimer(self) self.timer.setInterval(30) self.timer.timeout.connect(self._refresh) self.timer.start() def _build_ui(self): root = QVBoxLayout(self) root.setContentsMargins(4, 6, 4, 6) root.setSpacing(4) header = QLabel("MASTER") header.setFont(QFont("Segoe UI", 8, QFont.Bold)) header.setAlignment(Qt.AlignCenter) header.setStyleSheet("color: #888; background: transparent; border: none;") root.addWidget(header) meter_row = QHBoxLayout() meter_row.setSpacing(2) self.vu_meter = VUMeter() meter_row.addWidget(self.vu_meter, stretch=1) self.volume_slider = QSlider(Qt.Vertical) self.volume_slider.setRange(0, 100) self.volume_slider.setValue(int(math.sqrt(self._master.volume) * 100)) self.volume_slider.setStyleSheet(""" QSlider::groove:vertical { background: #22242a; width: 4px; border-radius: 2px; } QSlider::handle:vertical { background: #8890a0; height: 12px; width: 14px; margin: -4px -5px; border-radius: 2px; } QSlider::handle:vertical:hover { background: #b0b8c8; } QSlider::add-page:vertical { background: qlineargradient(x1:0, y1:0, x2:0, y2:1, stop:0 #00cc66, stop:1 #008844); border-radius: 2px; } QSlider::sub-page:vertical { background: transparent; border-radius: 2px; } """) meter_row.addWidget(self.volume_slider, stretch=1) root.addLayout(meter_row, stretch=1) self.volume_slider.valueChanged.connect(self._on_volume_changed) def _on_volume_changed(self, value: int): vol = (value / 100.0) ** 2 self._master.volume = vol def _refresh(self): self.vu_meter.set_value(self._master.vu_peak) self.volume_slider.setValue(int(math.sqrt(self._master.volume) * 100)) class EffectSection(QFrame): def __init__(self, engine, parent=None): super().__init__(parent) self.engine = engine self._master = engine.mixer['master'] self._knobs = {} self.setFixedWidth(110) self.setSizePolicy(QSizePolicy.Fixed, QSizePolicy.Expanding) self.setStyleSheet(""" EffectSection { background-color: #181a1e; border: 1px solid #282a30; border-radius: 6px; } """) self._build_ui() self.timer = QTimer(self) self.timer.setInterval(30) self.timer.timeout.connect(self._refresh) self.timer.start() def _build_ui(self): root = QVBoxLayout(self) root.setContentsMargins(3, 6, 3, 6) root.setSpacing(2) header = QLabel("FX") header.setFont(QFont("Segoe UI", 8, QFont.Bold)) header.setAlignment(Qt.AlignCenter) header.setStyleSheet("color: #556670; background: transparent; border: none;") root.addWidget(header) lufs_frame = QFrame() lufs_frame.setStyleSheet("QFrame { background-color: #121318; border: 1px solid #22242a; border-radius: 4px; }") lufs_layout = QVBoxLayout(lufs_frame) lufs_layout.setContentsMargins(3, 4, 3, 4) lufs_layout.setSpacing(2) self.lufs_value = QLabel("-70.0") self.lufs_value.setFont(QFont("Segoe UI", 13, QFont.Bold)) self.lufs_value.setAlignment(Qt.AlignCenter) self.lufs_value.setStyleSheet("color: #00cc88; background: transparent; border: none;") lufs_layout.addWidget(self.lufs_value) lufs_unit = QLabel("LUFS") lufs_unit.setFont(QFont("Segoe UI", 6)) lufs_unit.setAlignment(Qt.AlignCenter) lufs_unit.setStyleSheet("color: #556; background: transparent; border: none;") lufs_layout.addWidget(lufs_unit) self.pfl_indicator = QLabel("PFL\n—") self.pfl_indicator.setFont(QFont("Segoe UI", 5)) self.pfl_indicator.setAlignment(Qt.AlignCenter) self.pfl_indicator.setStyleSheet("color: #556; background: transparent; border: none;") lufs_layout.addWidget(self.pfl_indicator) root.addWidget(lufs_frame) knob_col = QVBoxLayout() knob_col.setSpacing(1) bypass_row = QHBoxLayout() bypass_row.setSpacing(2) for label, btn_ref, obj, attr in [ ("C", "comp_bypass", self._master.compressor, 'bypassed'), ("L", "lim_bypass", self._master.limiter, 'bypassed'), ]: btn = QPushButton(label) btn.setFixedSize(24, 18) btn.setCheckable(True) btn.setFont(QFont("Segoe UI", 7, QFont.Bold)) btn.setStyleSheet(""" QPushButton { background-color: #22242a; color: #889; border: 1px solid #333; border-radius: 3px; } QPushButton:checked { background-color: #4a1a1a; color: #ff6666; border: 1px solid #ff4444; } """) setattr(self, btn_ref, btn) btn.toggled.connect(lambda c, o=obj, a=attr: setattr(o, a, c)) bypass_row.addWidget(btn) knob_col.addLayout(bypass_row) for label, attr, default, lo, hi, suffix in [ ("THR", "threshold_db", -20, -60, 0, "dB"), ("RAT", "ratio", 4, 1, 20, ":1"), ("ATK", "attack_ms", 5, 0.1, 50, "ms"), ("REL", "release_ms", 100, 10, 1000, "ms"), ("MKG", "makeup_gain_db", 0, 0, 24, "dB"), ("CEIL", "ceiling_db", -0.1, -10, 0, "dB"), ]: obj = self._master.compressor if attr != "ceiling_db" else self._master.limiter k, dial, val_label = self._make_knob(label, obj, attr, default, lo, hi, suffix) knob_col.addWidget(k) self._knobs[('compressor' if attr != 'ceiling_db' else 'limiter', attr)] = (dial, val_label, lo, hi, suffix) root.addLayout(knob_col) def _make_knob(self, label, obj, attr, default, lo, hi, suffix): frame = QFrame() frame.setStyleSheet("background: transparent; border: none;") layout = QHBoxLayout(frame) layout.setContentsMargins(0, 0, 0, 0) layout.setSpacing(2) dial = QDial() dial.setFixedSize(30, 30) dial.setRange(0, 1000) dial.setNotchesVisible(False) dial.setStyleSheet(""" QDial { background-color: #121318; border: 1px solid #2a2c33; border-radius: 15px; } """) def _val_to_pos(v): return int((v - lo) / (hi - lo) * 1000) def _pos_to_val(p): return lo + (p / 1000.0) * (hi - lo) dial.setValue(_val_to_pos(default)) lbl = QLabel(label) lbl.setFont(QFont("Segoe UI", 8, QFont.Bold)) lbl.setAlignment(Qt.AlignLeft | Qt.AlignVCenter) lbl.setStyleSheet("color: #889; background: transparent; border: none;") val_label = QLabel(f"{default}{suffix}") val_label.setFont(QFont("Segoe UI", 7)) val_label.setAlignment(Qt.AlignRight | Qt.AlignVCenter) val_label.setStyleSheet("color: #667; background: transparent; border: none;") def _on_dial(v): val = _pos_to_val(v) if attr == "ratio": val = round(max(1, val), 1) elif attr in ("threshold_db", "ceiling_db", "makeup_gain_db"): val = round(max(lo, min(hi, val)), 1) elif attr in ("attack_ms",): val = round(max(0.1, val), 1) elif attr == "release_ms": val = round(max(1, val), 0) setattr(obj, attr, val) if attr == "attack_ms": obj.set_attack(val) elif attr == "release_ms": obj.set_release(val) val_label.setText(f"{val}{suffix}") dial.valueChanged.connect(_on_dial) layout.addWidget(dial) layout.addWidget(lbl, 1) layout.addWidget(val_label) return frame, dial, val_label def _refresh(self): for (section, attr), (dial, val_label, lo, hi, suffix) in self._knobs.items(): obj = self._master.compressor if section == 'compressor' else self._master.limiter val = getattr(obj, attr, lo) dial.blockSignals(True) dial.setValue(int((val - lo) / (hi - lo) * 1000)) dial.blockSignals(False) val_label.setText(f"{val}{suffix}") self.lufs_value.setText(f"{self._master.lufs_current:.1f}") active_pfl = [ch for ch in self.engine.mixer['channels'] if ch.pfl] if active_pfl: names = ", ".join(ch.name[:3] for ch in active_pfl) self.pfl_indicator.setText(f"PFL\n{names}") self.pfl_indicator.setStyleSheet("color: #00aaff; background: transparent; border: none;") else: self.pfl_indicator.setText("PFL\n—") self.pfl_indicator.setStyleSheet("color: #556; background: transparent; border: none;") class MixerWidget(QFrame): def __init__(self, engine, parent=None): super().__init__(parent) self.engine = engine self.setStyleSheet(""" MixerWidget { background-color: #121318; border: 1px solid #282a30; border-radius: 8px; } """) self._build_ui() def _build_ui(self): root = QVBoxLayout(self) root.setContentsMargins(6, 4, 6, 6) root.setSpacing(4) header = QLabel("MIXER") header.setFont(QFont("Segoe UI", 9, QFont.Bold)) header.setStyleSheet("color: #556670; background: transparent; border: none; " "letter-spacing: 2px;") root.addWidget(header) scroll = QScrollArea() scroll.setWidgetResizable(True) scroll.setHorizontalScrollBarPolicy(Qt.ScrollBarAsNeeded) scroll.setVerticalScrollBarPolicy(Qt.ScrollBarAlwaysOff) scroll.setStyleSheet(""" QScrollArea { border: none; background: transparent; } QScrollBar:horizontal { background: #1a1c22; height: 6px; border-radius: 3px; } QScrollBar::handle:horizontal { background: #3a3c44; border-radius: 3px; } QScrollBar::handle:horizontal:hover { background: #5a5c64; } QScrollBar::add-line:horizontal, QScrollBar::sub-line:horizontal { width: 0px; } """) scroll_content = QWidget() scroll_content.setStyleSheet("background: transparent;") channels_layout = QHBoxLayout(scroll_content) channels_layout.setContentsMargins(0, 0, 0, 0) channels_layout.setSpacing(4) self._strips = [] for i in range(NUM_MIXER_CHANNELS): strip = ChannelStrip(self.engine, i) self._strips.append(strip) channels_layout.addWidget(strip) self.master_pre = MasterPreSection(self.engine) channels_layout.addWidget(self.master_pre) self.effects = EffectSection(self.engine) channels_layout.addWidget(self.effects) scroll.setWidget(scroll_content) root.addWidget(scroll) def apply_theme(self, theme: dict): for strip in self._strips: strip.apply_theme(theme) self.master_pre.apply_theme(theme) self.effects.apply_theme(theme) def refresh_strips(self): for strip in self._strips: ch = strip._channel strip.name_btn.setText(ch.name) strip.volume_slider.setValue(int(ch.volume * 100)) strip.mute_btn.setChecked(ch.muted) strip.solo_btn.setChecked(ch.solo) strip.pfl_btn.setChecked(ch.pfl)