SerenityOS/serenity

Intel HDA on QEMU Windows regularly skips ahead in audio

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#18,132 建立於 2023年4月1日

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 (4 留言) (0 反應) (0 負責人)C++ (33,171 star) (3,328 fork)batch import
bughelp wanted

描述

The exact skipping behaviour observed here is not short stops in audio playback, but the not-playing of certain parts of the audio, which happens semi-regularly. The audio is not "pausing", it is "skipping ahead".

Parameters that, as far as has been tested, do not affect this behaviour:

  • HDA stream buffer size (40 to 400ms tested)
  • QEMU DirectSound timer interrupt (2ms to 40ms tested including the recommended default of 10ms)

As far as known, this issue is specific to QEMU on Windows and the DirectSound audio backend. It is NOT (only) a general issue with DirectSound, as AC'97 does not have this problem under identical backend settings.

貢獻者指南

技術棧
cpp
領域
backend
議題類型
bug
難度面向新貢獻者的預計實作難度，1 表示很小改動，5 表示專家級工作。
5
預計時間有經驗貢獻者完成調查、實作、測試並準備 pull request 的粗略時間範圍。
over 1 week
活動狀態議題目前的可參與程度：新鮮、活躍、陳舊、阻塞或等待維護者輸入。
stale
清晰度議題是否清楚說明預期改動、驗收標準和下一步。
clear
前置要求
C++ knowledgeAudio driver conceptsQEMU internalsWindows DirectSound
新手友善度1-100 的估計分數，表示該議題對首次貢獻者的友善程度。
10
研究方向
Investigate the Intel HDA audio driver in SerenityOS (likely in Kernel/Sound/). Compare the audio buffer handling with the working AC'97 driver. Also examine the interaction with QEMU's DirectSound backend to identify why skipping occurs specifically with HDA.
Intel HDA on QEMU Windows regularly skips ahead in audio · SerenityOS/serenity#18132 | Good First Issue