Module: wine Branch: master Commit: fc84b8675a848683988d1793ea4bc9f95b7ea395 URL: https://source.winehq.org/git/wine.git/?a=commit;h=fc84b8675a848683988d1793e...
Author: Nikola Pavlica pavlica.nikola@gmail.com Date: Tue Apr 23 20:04:23 2019 +0200
dsound: Added 7.1 to stereo downmix.
Signed-off-by: Nikola Pavlica pavlica.nikola@gmail.com Signed-off-by: Andrew Eikum aeikum@codeweavers.com Signed-off-by: Alexandre Julliard julliard@winehq.org
---
dlls/dsound/dsound_convert.c | 47 ++++++++++++++++++++++++++++++++++++++++++++ dlls/dsound/dsound_private.h | 1 + dlls/dsound/mixer.c | 6 ++++++ 3 files changed, 54 insertions(+)
diff --git a/dlls/dsound/dsound_convert.c b/dlls/dsound/dsound_convert.c index 6171b16..3519337 100644 --- a/dlls/dsound/dsound_convert.c +++ b/dlls/dsound/dsound_convert.c @@ -251,6 +251,53 @@ void put_surround512stereo(const IDirectSoundBufferImpl *dsb, DWORD pos, DWORD c } }
+void put_surround712stereo(const IDirectSoundBufferImpl *dsb, DWORD pos, DWORD channel, float value) +{ + /* based on analyzing a recording of a dsound downmix */ + switch(channel){ + + case 6: /* back left */ + value *= 0.24f; + dsb->put_aux(dsb, pos, 0, value); + break; + + case 4: /* surround left */ + value *= 0.24f; + dsb->put_aux(dsb, pos, 0, value); + break; + + case 0: /* front left */ + value *= 1.0f; + dsb->put_aux(dsb, pos, 0, value); + break; + + case 7: /* back right */ + value *= 0.24f; + dsb->put_aux(dsb, pos, 1, value); + break; + + case 5: /* surround right */ + value *= 0.24f; + dsb->put_aux(dsb, pos, 1, value); + break; + + case 1: /* front right */ + value *= 1.0f; + dsb->put_aux(dsb, pos, 1, value); + break; + + case 2: /* centre */ + value *= 0.7; + dsb->put_aux(dsb, pos, 0, value); + dsb->put_aux(dsb, pos, 1, value); + break; + + case 3: + /* LFE is totally ignored in dsound when downmixing to 2 channels */ + break; + } +} + void put_quad2stereo(const IDirectSoundBufferImpl *dsb, DWORD pos, DWORD channel, float value) { /* based on pulseaudio's downmix algorithm */ diff --git a/dlls/dsound/dsound_private.h b/dlls/dsound/dsound_private.h index 45a100e..b04ce06 100644 --- a/dlls/dsound/dsound_private.h +++ b/dlls/dsound/dsound_private.h @@ -179,6 +179,7 @@ void put_stereo2quad(const IDirectSoundBufferImpl *dsb, DWORD pos, DWORD channel void put_mono2surround51(const IDirectSoundBufferImpl *dsb, DWORD pos, DWORD channel, float value) DECLSPEC_HIDDEN; void put_stereo2surround51(const IDirectSoundBufferImpl *dsb, DWORD pos, DWORD channel, float value) DECLSPEC_HIDDEN; void put_surround512stereo(const IDirectSoundBufferImpl *dsb, DWORD pos, DWORD channel, float value) DECLSPEC_HIDDEN; +void put_surround712stereo(const IDirectSoundBufferImpl *dsb, DWORD pos, DWORD channel, float value) DECLSPEC_HIDDEN; void put_quad2stereo(const IDirectSoundBufferImpl *dsb, DWORD pos, DWORD channel, float value) DECLSPEC_HIDDEN;
HRESULT secondarybuffer_create(DirectSoundDevice *device, const DSBUFFERDESC *dsbd, diff --git a/dlls/dsound/mixer.c b/dlls/dsound/mixer.c index 32bde38..05ca99b 100644 --- a/dlls/dsound/mixer.c +++ b/dlls/dsound/mixer.c @@ -179,6 +179,12 @@ void DSOUND_RecalcFormat(IDirectSoundBufferImpl *dsb) dsb->put = put_surround512stereo; dsb->put_aux = putieee32_sum; } + else if (ichannels == 8 && ochannels == 2) + { + dsb->mix_channels = 8; + dsb->put = put_surround712stereo; + dsb->put_aux = putieee32_sum; + } else if (ichannels == 4 && ochannels == 2) { dsb->mix_channels = 4;