SerenityOS/serenity

Intel HDA on QEMU Windows regularly skips ahead in audio

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#18,132 创建于 2023年4月1日

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 (4 评论) (0 反应) (0 负责人)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.

贡献者指南

技术栈
cpp
领域
backend
议题类型
bug
难度面向新贡献者的预计实现难度，1 表示很小改动，5 表示专家级工作。
5
预计时间有经验贡献者完成调查、实现、测试并准备 pull request 的粗略时间范围。
over 1 week
活动状态议题当前的可参与程度：新鲜、活跃、陈旧、阻塞或等待维护者输入。
stale
清晰度议题是否清楚说明期望改动、验收标准和下一步。
clear
前置要求
C++ knowledgeAudio driver conceptsQEMU internalsWindows DirectSound
新手友好度1-100 的估计分数，表示该议题对首次贡献者的友好程度。
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.