Add a config to output first-, second-, or third-order ambisonics

Currently incomplete, as second- and third-order output will not correctly
handle B-Format input buffers. A standalone up-sampler will be needed, similar
to the high-quality decoder.

Also, output is ACN ordering with SN3D normalization. A config option will
eventually be provided to change this if desired.

1 files changed, 6 insertions, 0 deletions

diff --git a/Alc/backends/dsound.c b/Alc/backends/dsound.c
index da6fbacf..a477360c 100644
--- a/Alc/backends/dsound.c
+++ b/Alc/backends/dsound.c
@@ -473,6 +473,9 @@ static ALCboolean ALCdsoundPlayback_reset(ALCdsoundPlayback *self)
                 OutputType.dwChannelMask = SPEAKER_FRONT_CENTER;
                 break;
             case DevFmtBFormat3D:
+            case DevFmtAmbi1:
+            case DevFmtAmbi2:
+            case DevFmtAmbi3:
                 device->FmtChans = DevFmtStereo;
                 /*fall-through*/
             case DevFmtStereo:
@@ -789,6 +792,9 @@ static ALCenum ALCdsoundCapture_open(ALCdsoundCapture *self, const ALCchar *devi
                                           SPEAKER_SIDE_RIGHT;
                 break;
             case DevFmtBFormat3D:
+            case DevFmtAmbi1:
+            case DevFmtAmbi2:
+            case DevFmtAmbi3:
                 break;
         }