commit 7099a6a220c33d9c115e19e9f03ac61caa8358b5
author Volker Rümelin <vr_qemu@t-online.de> Fri Sep 23 20:36:30 2022 +0200
committer Gerd Hoffmann <kraxel@redhat.com> Tue Oct 11 10:17:08 2022 +0200
tree 95d88180cc381e1fa8dc804ff0b7f31d1b2692ee
parent 4d31ff32a65adfae015e035931b864bd1c521d6e

audio: fix GUS audio playback with out.mixing-engine=off

Fix GUS audio playback with out.mixing-engine=off.

The GUS audio device needs to know the amount of samples to
produce in advance.

To reproduce start qemu with
-parallel none -device gus,audiodev=audio0
-audiodev pa,id=audio0,out.mixing-engine=off

and start the cartoon.exe demo in a FreeDOS guest. The demo file
is available on the download page of the GUSemu32 author.

Signed-off-by: Volker Rümelin <vr_qemu@t-online.de>
Acked-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20220923183640.8314-2-vr_qemu@t-online.de>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

audio/audio.c

diff --git a/audio/audio.c b/audio/audio.c
index 08aec51..29da359 100644
--- a/audio/audio.c
+++ b/audio/audio.c
@@ -1139,7 +1139,8 @@
             }
 
             if (sw->active) {
-                sw->callback.fn(sw->callback.opaque, INT_MAX);
+                sw->callback.fn(sw->callback.opaque,
+                                hw_free * sw->info.bytes_per_frame);
             }
 
             continue;