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kvm
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34 Commits

Author SHA1 Message Date
Alex P 19fe908426 refactor: Simplify audio implementation 
Remove dynamic gain code and rely on Opus encoder quality improvements:
- Increase Opus complexity from 2 to 5 for better quality
- Change bandwidth from FULLBAND (20kHz) to SUPERWIDEBAND (16kHz) for better quality at 128kbps
- Disable FEC to allocate all bits to audio quality
- Increase ALSA buffer from 40ms to 80ms for stability

The dynamic gain code was adding complexity without solving the underlying
issue: TC358743 HDMI chip captures digital audio at whatever volume the
source outputs. Users should adjust volume at the source or in their browser.
 2025-10-07 00:25:45 +03:00
Alex P 04dd37f58f fix: Add noise gate to prevent amplifying silence artifacts 
Add noise gate threshold at peak > 256 (-42dB) to prevent dynamic gain
from amplifying quantization noise and hardware noise floor. This fixes
crackling, buzzing, and static-like noise when HDMI audio is at very
low volume or during silence.

Without the gate, signals below -42dB (peak < 256) would get 8x gain
applied, amplifying noise floor to audible levels. Now these signals
pass through unmodified, eliminating the artifacts.
 2025-10-06 22:23:23 +03:00
Alex P 7872ddc8fc Refactor: Simplify / rewrite Audio 2025-10-06 21:59:44 +03:00
Alex P 178c7486cc [WIP] Updates: reduce PR complexity 2025-10-01 22:54:37 +03:00
Alex P 70ef7193fd Cleanup: remove silence detection 2025-09-30 14:32:36 +00:00
Alex P 35b5dbd034 [WIP] Cleanup: cleanup audio code after HDMI switch 2025-09-30 13:32:56 +00:00
Alex P 7dc57bcdf3 [WIP] Fix: crackling sound when seeking forward after migrating to HDMI Audio 2025-09-30 13:14:15 +00:00
Alex P 05b347fe74 [WIP] Fix: crackling sound when seeking forwars 2025-09-30 13:11:16 +00:00
Alex P e989cad633 [WIP] Fix: crackling sound when seeking forwars 2025-09-30 12:58:49 +00:00
Alex P fc38830af1 [WIP] Updates: simplify audio system 2025-09-30 12:36:41 +00:00
Alex P 76b80da157 Updates: adjust gain to avoid audio artifacts 2025-09-30 12:05:03 +00:00
Alex P 01719e01dd [WIP] Updates: simplify audio system 2025-09-30 11:41:17 +00:00
Alex P 753c613708 [WIP] Updates: simplify audio system 2025-09-30 11:03:34 +00:00
Alex P f6dd605ea6 [WIP] Updates: simplify audio system 2025-09-30 09:36:19 +00:00
Alex P 6c6a1def28 [WIP] Updates: simplify audio system 2025-09-30 09:04:07 +00:00
Alex P 140a803ccf perf(audio): add ARM NEON SIMD optimizations for audio processing 
Implement SIMD-optimized audio operations using ARM NEON for Cortex-A7 targets
Update Makefile and CI configuration to support NEON compilation flags
Add SIMD implementations for common audio operations including:
- Sample clearing and interleaving
- Volume scaling and format conversion
- Channel manipulation and balance adjustment
- Endianness swapping and prefetching
 2025-09-16 18:18:19 +00:00
Alex P eca3c52513 PR Review Optimization: As recommended, use ternary operators instead of if/else for better readability 2025-09-16 16:17:56 +03:00
Alex P 55bcfb5a22 Consistency: keep if block multi-line 2025-09-16 16:08:16 +03:00
Alex P a5fb3bf30c Fix: remove misplaced const 2025-09-16 15:52:53 +03:00
Alex P 26e71806cb Cleanup, Optimizations: Small aaudio optimizations 2025-09-16 15:46:55 +03:00
Alex P 2f7bf55f22 Cleanup, Optimizations: Small aaudio optimizations 2025-09-16 15:45:03 +03:00
Alex P 8a3f1b6c32 Cleanup, Optimizations: Small aaudio optimizations 2025-09-16 15:37:23 +03:00
Alex P 7ffb9e1d59 Cleanup: removed redundant code, comments, etc. 2025-09-16 15:31:10 +03:00
Alex P 1f88dab95f [WIP] Maintainability Improvement: Add debug logging throughout the audio system for easy debugging and troubleshooting 2025-09-16 15:05:08 +03:00
Alex P 0944c886e5 [WIP] Maintainability Improvement: Add debug logging throughout the audio system for easy debugging and troubleshooting 2025-09-16 11:27:18 +03:00
Alex P 5e257b3144 [WIP] Add debug logging throughout the audio system 2025-09-16 11:26:48 +03:00
Alex P fb98c4edcb [WIP] Maintainability: Add debug / trace logs to make it easy to debug audio input issues 2025-09-16 11:11:18 +03:00
Alex P e894470ca8 [WIP] Cleanup: function naming 2025-09-16 07:33:34 +00:00
Alex P 996016b0da [WIP] Cleanup: remove unnecessary complexity 2025-09-15 23:00:03 +00:00
Alex P ebb79600b0 Fix: pcm_snd_wait won't work when device is busy 2025-09-16 00:32:19 +03:00
Alex P b040b8feaf [WIP] Optimizations: Optimize audio system 2025-09-15 21:22:02 +00:00
Alex P e29694921b Fix: indentation 2025-09-15 14:29:02 +03:00
Alex P b6858ab155 [WIP] Cleanup / Refinement: PR Review 2025-09-14 21:55:31 +00:00
Alex P 0e76023c39 Improvement (Maintainability): Make all C code more manageable by moving it to its own dedicated file 2025-09-11 13:27:10 +03:00