| 727 | { |
| 728 | if (!_selectedDevice.empty()) |
| 729 | return _selectedDevice; |
| 730 | if (_device) |
| 731 | { |
| 732 | const char* name = alcGetString(static_cast<ALCdevice*>(_device), ALC_DEVICE_SPECIFIER); |
| 733 | if (name) |
| 734 | return name; |
| 735 | } |
| 736 | return {}; |
| 737 | } |
| 738 | |
| 739 | bool SoundSystemOAL::SwitchOutputDevice(const char* name) |
| 740 | { |
| 741 | // Hold the audio lock across the whole swap: between destroying the old |
| 742 | // context and binding the new one there is no current context, so the |
| 743 | // streaming pump must not issue AL calls. It blocks on this lock until the |
| 744 | // rebind completes, then resumes against the new context. |
| 745 | std::lock_guard<std::recursive_mutex> lk(_audioMutex); |
| 746 | std::string requested = (name && *name) ? std::string(name) : std::string(); |
| 747 | if (requested == _selectedDevice && _device) |
| 748 | return true; |
| 749 | |
| 750 | ALCdevice* newDevice = alcOpenDevice(requested.empty() ? nullptr : requested.c_str()); |
| 751 | if (!newDevice) |
| 752 | { |
| 753 | LOG_ERROR(Audio, "SwitchOutputDevice: alcOpenDevice failed for '{}'", |
| 754 | requested.empty() ? "<default>" : requested.c_str()); |
| 755 | return false; |
| 756 | } |
| 757 | |
| 758 | ALCcontext* newContext = alcCreateContext(newDevice, nullptr); |
| 759 | if (!newContext) |
| 760 | { |
| 761 | LOG_ERROR(Audio, "SwitchOutputDevice: alcCreateContext failed"); |
| 762 | alcCloseDevice(newDevice); |
| 763 | return false; |
| 764 | } |
| 765 | |
| 766 | // Snapshot volumes — backends typically initialise to 5.f on |
| 767 | // construction and we don't want a device-switch to silently |
| 768 | // jolt levels. |
| 769 | ALCdevice* oldDevice = static_cast<ALCdevice*>(_device); |
| 770 | ALCcontext* oldContext = static_cast<ALCcontext*>(_context); |
| 771 | float cd = _cdVolume; |
| 772 | float wave = _waveVolume; |
| 773 | float speech = _speechVolume; |
| 774 | bool wantEAX = _eaxEnabled; |
| 775 | |
| 776 | // Note whether the device preview is currently in flight so we can |
| 777 | // resume after the context swap. StartDevicePreview computes the |
| 778 | // playback offset from a wall-clock anchor (NOT the AL source's |
| 779 | // AL_SEC_OFFSET) — this stays accurate across the context teardown |
| 780 | // and rapid clicks no longer collapse the offset to ~0. |
| 781 | bool wasDevicePreviewing = (_previewDevice.GetRef() != nullptr); |
| 782 | |
| 783 | // Drop the in-flight preview waves while the OLD context is still |
| 784 | // current so their AL handles get released cleanly. Note: the |
| 785 | // wall-clock anchor (_devicePreviewAnchorMs) is intentionally NOT |
| 786 | // reset here — only TerminatePreview's "true cancel" path resets |