mirror of https://github.com/jetkvm/kvm.git
a6b7ac50ef
Problem: Previous fix reduced but didn't eliminate the hang when switching audio sources. The C layer was still blocking on snd_pcm_readi()/snd_pcm_writei() while holding the mutex, preventing cleanup from proceeding. Solution: Call snd_pcm_drop() BEFORE acquiring the mutex in close functions. This immediately interrupts any blocking ALSA read/write operations, causing them to return with -EBADFD or -ESTRPIPE. The sequence is now: 1. Set stop_requested flag 2. Call snd_pcm_drop() to interrupt blocking I/O (no mutex needed - thread-safe) 3. Acquire mutex for cleanup 4. Close handles and free resources 5. Release mutex This makes audio source switching instantaneous with zero hang. Changes: - jetkvm_audio_capture_close(): Drop PCM before mutex - jetkvm_audio_playback_close(): Drop PCM before mutex Tested: USB↔HDMI switching now happens instantly with no delay. |
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| .. | ||
| audio.c | ||
| audio_common.c | ||
| audio_common.h | ||