duke3d: further optimize audio mixing

Rather than holding intermediate results as fixed-point, this converts them
directly to normal integers (in the range of the PCM sample) while mixing,
instead of waiting till the end to perform a separate shifting step. Also,
this precalculates some constants in the reverb code.

Change-Id: Ie04e444d145bc28ce67eef9ae0ead6d328acf28a

1 files changed, 1 insertions, 0 deletions

diff --git a/apps/plugins/sdl/progs/duke3d/Game/src/config.c b/apps/plugins/sdl/progs/duke3d/Game/src/config.c
index 038875a4e5..1649c40b07 100644
--- a/apps/plugins/sdl/progs/duke3d/Game/src/config.c
+++ b/apps/plugins/sdl/progs/duke3d/Game/src/config.c
@@ -728,6 +728,7 @@ void CONFIG_ReadSetup( void )
    NumBits = 16;
    SCRIPT_GetNumber( scripthandle, "Sound Setup", "MixRate",&MixRate);
    MixRate = RB_SAMPR;
+   printf("MixRate = %d Hz", MixRate);
    SCRIPT_GetNumber( scripthandle, "Sound Setup", "MidiPort",&MidiPort);
    SCRIPT_GetNumber( scripthandle, "Sound Setup", "BlasterAddress",&dummy);
    BlasterConfig.Address = dummy;