This bug report was migrated from our old Bugzilla tracker.

These attachments are available in the static archive:

• audio thread priority patch (sdl2-coreaudio-thread-priority.patch, text/plain, 2018-05-04 17:48:12 +0000, 544 bytes)

Reported in version: 2.0.8
Reported for operating system, platform: iOS 11, iPhone/iPod touch

Comments on the original bug report:

On 2018-05-04 17:48:12 +0000, philhassey wrote:

Created attachment 3236
audio thread priority patch

I've noticed that the audio skips really badly during suspending and resuming on iOS. Sometimes it skips other times as well.

This issue is new to versions of SDL2 that use core audio.

I'm using these settings:

want.freq = 44100;
want.format = AUDIO_F32SYS;
want.channels = 2;
want.samples = 1024;

I've attached a patch that sets the audio thread priority to HIGH which largely resolves the issue.

On 2018-05-05 17:37:05 +0000, Sam Lantinga wrote:

The iOS audio code has been changed, can you check the latest version and see if the issue still happens, and if so, can you provide an updated patch?
http://www.libsdl.org/tmp/SDL-2.0.zip

Thanks!

On 2018-05-05 18:30:35 +0000, philhassey wrote:

The coreaudio code contained in SDL-2.0.8-11956 appears to resolve the issue. Thanks!

On 2018-05-06 02:11:32 +0000, Sam Lantinga wrote:

You're welcome!

On 2019-03-25 17:00:33 +0000, Ryan C. Gordon wrote:

Just backed out the code that solved this previously, so this commit should also fix this for 2.0.10, if you find yourself in a position to verify the latest in revision control: https://hg.libsdl.org/SDL/rev/a7b99312d9f3

--ryan.