Git conversion: Make reactos the root directory, move rosapps, rostests, wallpapers...

[reactos.git] / drivers / multimedia / audio / sound / mixer.c

diff --git a/drivers/multimedia/audio/sound/mixer.c b/drivers/multimedia/audio/sound/mixer.c
new file mode 100644 (file)
index 0000000..3015261
--- /dev/null
+++ b/drivers/multimedia/audio/sound/mixer.c
@@ -0,0 +1,50 @@
+/*
+ * COPYRIGHT:        See COPYING in the top level directory
+ * PROJECT:          ReactOS kernel
+ * FILE:             drivers/dd/sound/mixer.c
+ * PURPOSE:          Wave Mixer?
+ * PROGRAMMER:       ?
+ *
+ * UPDATE HISTORY:
+ *              ??/??/??: Created
+ *             10/23/02: Steven Edwards (Steven_Ed4153@yahoo.com)
+ *                       Minor build fixes
+ */
+
+#include "sb16.h"
+#include "dsp.h"
+#include "mixer.h"
+
+unsigned char read_mixer(unsigned short base,unsigned char reg)
+{
+
+//     outb(base+0x04,reg);
+//     return inb(base+0x05);
+       return 0;
+}
+
+unsigned char get_irq(SB16* sb16)
+{
+       unsigned char irq;
+       irq=(read_mixer(sb16->base,MIXER_INTERRUPT_SETUP_REGISTER)&0x0f);
+
+       if(irq==1) sb16->irq=2;
+       if(irq==2) sb16->irq=5;
+       if(irq==4) sb16->irq=7;
+       if(irq==8) sb16->irq=10;
+       return 0;
+}
+
+void get_dma(SB16* sb16)
+{
+       unsigned char hi,lo,result=read_mixer(sb16->base,MIXER_DMA_SETUP_REGISTER);
+  hi=result&0xE0;
+  lo=result&0x0B;
+  if(hi==0x80) sb16->dma16=7;
+  if(hi==0x40) sb16->dma16=6;
+  if(hi==0x20) sb16->dma16=5;
+
+  if(lo==0x08) sb16->dma8=3;
+  if(lo==0x02) sb16->dma8=1;
+  if(lo==0x01) sb16->dma8=0;
+}