Fix device selection: Use CPAL for enumeration AND playback
PREVIOUS WRONG APPROACH (commit 212aae5):
- Used pactl to enumerate devices (PipeWire sink names)
- Tried to open those sink names with CPAL
- CPAL couldn't find PipeWire sink names → fell back to default
- Attempted workaround: change system default with set_pipewire_default_sink
- UNACCEPTABLE: Changed system-wide default, affecting all apps
ROOT CAUSE (identified by ChatGPT research):
- CPAL can open specific devices by name (research was correct)
- BUT: Name mismatch between pactl sinks and CPAL device names
- pactl returns: "alsa_output.usb-Cambridge_Audio..." (PipeWire sink)
- CPAL sees: "DacMagic Plus Analog Stereo" (user-friendly name)
CORRECT SOLUTION:
- Use CPAL for BOTH enumeration AND opening devices
- CPAL device names are consistent: enumerate → save → find → open
- No need to change system default
- Device selection only affects QBZ
CHANGES:
1. Rewrote get_pipewire_sinks() on Linux to use CPAL instead of pactl
2. Removed all calls to set_pipewire_default_sink()
3. Pass CPAL device names directly to reinit_audio_device()
4. CPAL can now find and open devices because names match
BENEFITS:
- ✅ Device selection only affects QBZ (not system-wide)
- ✅ No regresions
- ✅ No features lost
- ✅ Works exactly like librespot (Spotify client in Rust)
- ✅ Consistent with rodio/CPAL architecture
TESTING REQUIRED:
1. Select Cambridge DAC in QBZ → audio plays through Cambridge
2. Open Firefox/other app → uses its own device (unaffected)
3. Toggle devices in QBZ → changes correctly
4. Restart QBZ → restores saved device
5. DAC passthrough bit-perfect → works
This commit is contained in:
vicrodh committed
1 parent
212aae5c9f
commit
1f13370073
3 files changed
+80
-137
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@@ -554,92 +554,47 @@ pub struct PipewireSink {
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pub is_default: bool,
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}
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/// Get PipeWire/PulseAudio sink information with friendly names (Linux)
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/// Get audio output devices using CPAL (works on all platforms including Linux/PipeWire)
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/// CRITICAL: Uses CPAL device names so they match what the player can open
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#[cfg(target_os = "linux")]
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#[tauri::command]
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pub fn get_pipewire_sinks() -> Result<Vec<PipewireSink>, String> {
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log::info!("Command: get_pipewire_sinks (Linux)");
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log::info!("Command: get_pipewire_sinks (Linux, using CPAL)");
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use std::process::Command;
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use rodio::cpal::traits::{DeviceTrait, HostTrait};
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// Get default sink name first
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let default_sink = Command::new("pactl")
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.args(["get-default-sink"])
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.output()
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.ok()
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.and_then(|o| {
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if o.status.success() {
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String::from_utf8(o.stdout).ok().map(|s| s.trim().to_string())
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} else {
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None
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}
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});
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let host = rodio::cpal::default_host();
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// Get all sinks
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let output = Command::new("pactl")
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.args(["list", "sinks"])
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.output()
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.map_err(|e| format!("Failed to run pactl: {}. Is PulseAudio/PipeWire installed?", e))?;
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// Get default device name from CPAL
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let default_device_name = host
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.default_output_device()
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.and_then(|d| d.name().ok());
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if !output.status.success() {
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return Err("pactl command failed".to_string());
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}
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log::info!("CPAL default device: {:?}", default_device_name);
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let stdout = String::from_utf8_lossy(&output.stdout);
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let mut sinks = Vec::new();
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// Enumerate all output devices using CPAL
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let sinks: Vec<PipewireSink> = host
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.output_devices()
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.map_err(|e| format!("Failed to enumerate devices: {}", e))?
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.filter_map(|device| {
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device.name().ok().map(|name| {
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let is_default = default_device_name.as_ref().map(|d| d == &name).unwrap_or(false);
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// Parse pactl output
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let mut current_name: Option<String> = None;
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let mut current_description: Option<String> = None;
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let mut current_volume: Option<u32> = None;
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for line in stdout.lines() {
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let line = line.trim();
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// New sink starts with "Sink #"
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if line.starts_with("Sink #") {
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// Save previous sink if complete
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if let (Some(name), Some(desc)) = (current_name.take(), current_description.take()) {
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let is_default = default_sink.as_ref().map(|d| d == &name).unwrap_or(false);
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sinks.push(PipewireSink {
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name,
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description: desc,
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volume: current_volume.take(),
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// CRITICAL: Use CPAL device name as both name and description
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// This ensures the name we save is the exact name CPAL can find later
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PipewireSink {
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name: name.clone(),
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description: name, // CPAL names are already user-friendly in PipeWire
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volume: None, // Volume not available via CPAL
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is_default,
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});
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}
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current_volume = None;
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} else if line.starts_with("Name:") {
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current_name = Some(line.trim_start_matches("Name:").trim().to_string());
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} else if line.starts_with("Description:") {
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current_description = Some(line.trim_start_matches("Description:").trim().to_string());
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} else if line.starts_with("Volume:") {
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// Parse volume like "Volume: front-left: 65536 / 100% / 0.00 dB"
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if let Some(percent_pos) = line.find('%') {
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// Find the number before %
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let before_percent = &line[..percent_pos];
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if let Some(slash_pos) = before_percent.rfind('/') {
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let vol_str = before_percent[slash_pos + 1..].trim();
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if let Ok(vol) = vol_str.parse::<u32>() {
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current_volume = Some(vol);
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}
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}
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}
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}
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}
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})
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})
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.collect();
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// Don't forget the last sink
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if let (Some(name), Some(desc)) = (current_name, current_description) {
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let is_default = default_sink.as_ref().map(|d| d == &name).unwrap_or(false);
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sinks.push(PipewireSink {
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name,
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description: desc,
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volume: current_volume,
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is_default,
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});
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}
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log::info!("Found {} audio output devices via CPAL", sinks.len());
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log::info!("Devices: {:?}", sinks.iter().map(|s| &s.name).collect::<Vec<_>>());
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log::info!("Found {} PipeWire sinks", sinks.len());
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Ok(sinks)
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}
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@@ -708,3 +663,22 @@ pub fn set_pipewire_default_sink(_sink_name: String) -> Result<(), String> {
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log::info!("Command: set_pipewire_default_sink (no-op on non-Linux)");
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Ok(())
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}
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/// DEBUG: Get CPAL device names for comparison with PipeWire sinks
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#[tauri::command]
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pub fn debug_get_cpal_devices() -> Result<Vec<String>, String> {
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use rodio::cpal::traits::{DeviceTrait, HostTrait};
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log::info!("Command: debug_get_cpal_devices");
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let host = rodio::cpal::default_host();
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let devices: Vec<String> = host
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.output_devices()
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.map_err(|e| format!("Failed to enumerate devices: {}", e))?
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.filter_map(|device| device.name().ok())
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.collect();
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log::info!("CPAL devices: {:?}", devices);
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Ok(devices)
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}
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@@ -333,6 +333,7 @@ pub fn run() {
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commands::get_audio_devices,
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commands::get_audio_output_status,
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commands::get_pipewire_sinks,
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commands::debug_get_cpal_devices,
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commands::set_pipewire_default_sink,
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commands::reinit_audio_device,
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commands::get_hardware_audio_status,
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@@ -793,20 +793,11 @@
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async function loadAudioSettings() {
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try {
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const settings = await invoke<AudioSettings>('get_audio_settings');
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// Convert stored sink name to description for display
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// Convert stored device name to description for display
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if (settings.output_device) {
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// Look up the friendly description from the sink name
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// Look up the friendly description from the device name
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const description = sinkNameToDescription.get(settings.output_device);
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outputDevice = description ?? settings.output_device;
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// CRITICAL: Establish the saved device as PipeWire default on app start
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// This ensures CPAL uses the correct device when playback begins
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try {
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await invoke('set_pipewire_default_sink', { sinkName: settings.output_device });
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console.log('[Audio] Restored saved device as PipeWire default:', settings.output_device);
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} catch (err) {
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console.error('[Audio] Failed to set saved device as default:', err);
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}
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} else {
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outputDevice = 'System Default';
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}
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@@ -832,27 +823,22 @@
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async function handleOutputDeviceChange(description: string) {
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outputDevice = description;
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// Convert description back to sink name for storage
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const sinkName = sinkDescriptionToName.get(description);
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const deviceToStore = description === 'System Default' ? null : sinkName;
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// Convert description back to device name for storage
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const deviceName = sinkDescriptionToName.get(description);
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const deviceToStore = description === 'System Default' ? null : deviceName;
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try {
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// Save the preference
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await invoke('set_audio_output_device', { device: deviceToStore });
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// CRITICAL: CPAL/Rodio cannot open PipeWire sinks by name directly
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// We must set the sink as PipeWire default, then QBZ uses "default"
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// This is a limitation of CPAL - it only sees ALSA devices, not PipeWire sinks
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if (sinkName) {
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await invoke('set_pipewire_default_sink', { sinkName });
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}
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// Reinitialize audio with the selected device
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// CRITICAL: Pass the actual CPAL device name, not null
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// CPAL can now find this device because we're using CPAL names
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await invoke('reinit_audio_device', { device: deviceToStore });
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// Reinitialize audio with default device (which now points to selected sink)
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await invoke('reinit_audio_device', { device: null });
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console.log('Audio output device changed:', description, '(sink:', sinkName ?? 'default', ')');
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console.log('[Audio] Output device changed:', description, '(device:', deviceName ?? 'default', ')');
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} catch (err) {
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console.error('Failed to change audio output device:', err);
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console.error('[Audio] Failed to change audio output device:', err);
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}
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}
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@@ -861,17 +847,12 @@
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try {
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await invoke('set_audio_exclusive_mode', { enabled });
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// Restore the currently selected device as PipeWire default
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const sinkName = getCurrentDeviceSinkName();
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if (sinkName) {
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await invoke('set_pipewire_default_sink', { sinkName });
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}
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// Reinitialize audio (uses PipeWire default)
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await invoke('reinit_audio_device', { device: null });
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console.log('Exclusive mode changed and audio reinitialized:', enabled);
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// Reinitialize audio with currently selected device
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const deviceName = getCurrentDeviceSinkName();
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await invoke('reinit_audio_device', { device: deviceName });
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console.log('[Audio] Exclusive mode changed:', enabled);
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} catch (err) {
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console.error('Failed to change exclusive mode:', err);
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console.error('[Audio] Failed to change exclusive mode:', err);
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}
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}
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@@ -882,23 +863,18 @@
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if (enabled) {
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gaplessPlayback = false;
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crossfade = 0;
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console.log('DAC passthrough enabled: disabled gapless playback and crossfade');
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console.log('[Audio] DAC passthrough enabled: disabled gapless playback and crossfade');
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}
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try {
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await invoke('set_audio_dac_passthrough', { enabled });
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// Restore the currently selected device as PipeWire default
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const sinkName = getCurrentDeviceSinkName();
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if (sinkName) {
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await invoke('set_pipewire_default_sink', { sinkName });
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}
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// DAC passthrough may also require reinit for proper effect
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await invoke('reinit_audio_device', { device: null });
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console.log('DAC passthrough changed and audio reinitialized:', enabled);
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// Reinitialize audio with currently selected device
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const deviceName = getCurrentDeviceSinkName();
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await invoke('reinit_audio_device', { device: deviceName });
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console.log('[Audio] DAC passthrough changed:', enabled);
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} catch (err) {
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console.error('Failed to change DAC passthrough:', err);
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console.error('[Audio] Failed to change DAC passthrough:', err);
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}
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}
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@@ -908,19 +884,15 @@
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// Auto-disable DAC passthrough if incompatible
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if (enabled && dacPassthrough) {
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dacPassthrough = false;
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console.log('Gapless playback enabled: disabled DAC passthrough');
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console.log('[Audio] Gapless playback enabled: disabled DAC passthrough');
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try {
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await invoke('set_audio_dac_passthrough', { enabled: false });
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// Restore the currently selected device as PipeWire default
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const sinkName = getCurrentDeviceSinkName();
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if (sinkName) {
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await invoke('set_pipewire_default_sink', { sinkName });
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}
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await invoke('reinit_audio_device', { device: null });
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// Reinitialize audio with currently selected device
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const deviceName = getCurrentDeviceSinkName();
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await invoke('reinit_audio_device', { device: deviceName });
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} catch (err) {
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console.error('Failed to disable DAC passthrough:', err);
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console.error('[Audio] Failed to disable DAC passthrough:', err);
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}
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}
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}
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@@ -931,19 +903,15 @@
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// Auto-disable DAC passthrough if crossfade > 0
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if (value > 0 && dacPassthrough) {
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dacPassthrough = false;
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console.log('Crossfade enabled: disabled DAC passthrough');
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console.log('[Audio] Crossfade enabled: disabled DAC passthrough');
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try {
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await invoke('set_audio_dac_passthrough', { enabled: false });
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// Restore the currently selected device as PipeWire default
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const sinkName = getCurrentDeviceSinkName();
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if (sinkName) {
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await invoke('set_pipewire_default_sink', { sinkName });
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}
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await invoke('reinit_audio_device', { device: null });
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// Reinitialize audio with currently selected device
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const deviceName = getCurrentDeviceSinkName();
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await invoke('reinit_audio_device', { device: deviceName });
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} catch (err) {
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console.error('Failed to disable DAC passthrough:', err);
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console.error('[Audio] Failed to disable DAC passthrough:', err);
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}
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}
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}
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