SerenityOS/serenity

Intel HDA on QEMU Windows regularly skips ahead in audio

Open

#18,132 opened on 2023年4月1日

GitHub で見る
 (4 comments) (0 reactions) (0 assignees)C++ (33,171 stars) (3,328 forks)batch import
bughelp wanted

説明

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.

コントリビューターガイド

技術スタック
cpp
領域
backend
Issue 種別
bug
難度新しい貢献者にとっての実装難度です。1 は非常に小さな変更、5 は専門的な作業です。
5
推定時間経験ある貢献者が調査、実装、テスト、pull request 準備にかけるおおよその時間範囲です。
over 1 week
活動状況Issue が今どれだけ取り組みやすいかを示します。新しい、活発、古い、ブロック中、またはメンテナー入力待ちなどです。
stale
明確さ期待される変更、受け入れ条件、次の手順がどれだけ明確かを示します。
clear
前提条件
C++ knowledgeAudio driver conceptsQEMU internalsWindows DirectSound
初心者向け度初回貢献者にどれだけ取り組みやすいかを 1-100 で推定したスコアです。
10
調査方針
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.