Signed-off-by: Nikola Pavlica <pavlica.nikola(a)gmail.com>
---
dlls/dsound/dsound_convert.c | 24 +++++++++++-------------
1 file changed, 11 insertions(+), 13 deletions(-)
diff --git a/dlls/dsound/dsound_convert.c b/dlls/dsound/dsound_convert.c
index 26dbb3220a..0da9823298 100644
--- a/dlls/dsound/dsound_convert.c
+++ b/dlls/dsound/dsound_convert.c
@@ -216,39 +216,37 @@ void put_stereo2surround51(const IDirectSoundBufferImpl *dsb, DWORD pos, DWORD c
void put_surround512stereo(const …
[View More]IDirectSoundBufferImpl *dsb, DWORD pos, DWORD channel, float value)
{
- /* based on pulseaudio's downmix algorithm */
+ /* based on analyzing a recording of a dsound downmix */
switch(channel){
- case 4: /* back left */
- value *= 0.056f; /* (1/9) / (sum of left volumes) */
+ case 4: /* surround left */
+ value *= 0.24f;
dsb->put_aux(dsb, pos, 0, value);
break;
case 0: /* front left */
- value *= 0.503f; /* 1 / (sum of left volumes) */
+ value *= 1.0f;
dsb->put_aux(dsb, pos, 0, value);
break;
- case 5: /* back right */
- value *= 0.056f; /* (1/9) / (sum of right volumes) */
+ case 5: /* surround right */
+ value *= 0.24f;
dsb->put_aux(dsb, pos, 1, value);
break;
case 1: /* front right */
- value *= 0.503f; /* 1 / (sum of right volumes) */
+ value *= 1.0f;
dsb->put_aux(dsb, pos, 1, value);
break;
- case 2: /* front centre */
- value *= 0.252f; /* 0.5 / (sum of left/right volumes) */
+ case 2: /* centre */
+ value *= 0.7;
dsb->put_aux(dsb, pos, 0, value);
dsb->put_aux(dsb, pos, 1, value);
break;
- case 3: /* LFE */
- value *= 0.189f; /* 0.375 / (sum of left/right volumes) */
- dsb->put_aux(dsb, pos, 0, value);
- dsb->put_aux(dsb, pos, 1, value);
+ case 3:
+ /* LFE is totally ignored in dsound when downmixing to 2 channels */
break;
}
}
--
2.21.0
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