DirectX Audio playback is broken with some multichannel files

This file has many lossy audio streams for testing http://streams.videolan.org/misc/test-files-ccc/%5bCCCP%5d_Mega_Audio_Test.mkv

On the master or the vlc-3.0.0-git-20150309-0002 build, when forcing the DirectX audio output aout the default track (AC3 5.1) stutters. When selecting Automatic this default track works (mmdevice aout is used), but when selecting the DTS 768 2ch track it stutters (mmdevice fails to initialize so directsound is used).

With the 2.2.0 release, forcing DirectX audio output or using Automatic aout the AC3 5.1 and DTS 2ch tracks play fine. When forcing mmdevice the AC3 5.1 track plays fine, it stutters when switching to DTS 2ch.

added Component::Audio: Windows plugins Platform::Windows desktop Severity::major Type::bug Version::master git labels

changed milestone to %Bugs paradize

vlc-3.0.0-git-20150309-0002 with audio output set to Automatic

Added attachment:

• v3-latest-auto-nok.txt

vlc-3.0.0-git-20150309-0002 with audio output set to DirectX Sound, all tracks stutter

Added attachment:

• v3-latest-directsound-nok2.txt

vlc-3.0.0-git-20150309-0002 with audio output set to Windows Multimedia Audio

Added attachment:

• v3-latest-mmdevice-nok.txt

v2.2.0 with audio ouput set to Automatic

Added attachment:

• v2-official-auto-ok.txt

v2.2.0 with audio ouput set to DirectX Audio

Added attachment:

• v2-official-directsound-ok.txt

v2.2.0 with audio ouput set to Windows Multimedia Audio

Added attachment:

• v2-official-mmdevice-nok.txt

Build vlc-3.0.0-git-20141110-0003 works with DirectX Audio Build vlc-3.0.0-git-20141117-1200 fails

Replying to [ticket:14186 robux4]:

With the 2.2.0 release, (...) forcing mmdevice the AC3 5.1 track plays fine, it stutters when switching to DTS 2ch.

No. The logs you posted tell a very different story. Forcing MMDevice leads to a (clean) failure in WASAPI and fall back to DirectSound. Your logs show exactly the same results in VLC 3.0 and VLC 2.2 with respect to MMDevice:

core debug: looking for aout stream module matching "any": 2 candidates
wasapi error: cannot negotiate audio format (error 0x88890008)
directsound debug: Windows speaker config: Stereo and stream has 5 channels, using 2 channels
core debug: using aout stream module "directsound"

So this is a DirectSound output bug.

Build vlc-3.0.0-git-20141117-1200 fails

DirectSound is known broken from 2d3723d1 to 944d96f7!^ so that does not really help.

commit 936279b5 Author: Steve Lhomme robUx4@videolabs.io Date: Thu Mar 19 12:08:12 2015 +0000

directsound: fix TimeGet returning a positive value on error

Fixes [#14186](https://code.videolan.org/videolan/vlc/-/issues/14186)

a positive HRESULT means it succeeded.

Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

Original author: robUx4@videolabs.io

added Status::fixed label

closed

changed milestone to %3.0.0

Milestone renamed

changed milestone to %3.0 FF

Milestone renamed