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ZVUK/SPK_TEST.C

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+/*
+   PCSPEAKER TESTING
+
+ Tento program testuje knihovnu PCSPEAK.ASM.
+ Program alokuje 64Kb v dolni casti pameti. Pote zacne tento blok prehravat
+ stale dokola rychlosti 16000 Hz. Prehrava se nahodny obsah, takze by mel byt
+ slyset nejakej sum nebo neco podobneho.
+
+*/
+
+#include <stdio.h>
+#include <conio.h>
+#include <pcspeak.h>
+#include <i86.h>
+
+UWORD seg;    //Segment bufferu
+UWORD sel;    //Selector na buffer
+
+  //Funkce pro alokaci v dolni casti pameti.
+  // Alloc dos memory
+void dosalloc (unsigned para,unsigned short *rmseg,unsigned short *select)
+{
+union REGS regs;
+
+regs.w.ax = 0x100;
+regs.w.bx = para;
+int386 (0x31,&regs,&regs);
+*rmseg = regs.w.ax;
+*select = regs.w.dx;
+}
+
+  //Funkce pro uvolneni v dolni casti pameti.
+	// Free dos memory
+void dosfree (unsigned short select)
+{
+union REGS regs;
+
+regs.w.ax = 0x101;
+regs.w.dx = select;
+int386 (0x31,&regs,&regs);
+}
+
+void alloc_buffer() //nejprve se zaalokuje buffer
+  {
+  dosalloc(65536/16,&seg,&sel);
+  }
+
+void dealloc_buffer() //dealokace
+  {
+  dosfree(sel);
+  }
+
+void speaker_test()
+  {
+  puts("Init...");
+  rm_proc_set(seg,sel,PORT_SPK,SPK_MODE);//Nastav rm_proc
+  load_rm_proc();               //nahraj rm_proc do dolni pameti
+  pc_speak_enable();            //PCSPEAKER do modu DAC (pokud se hraje na spk)
+  pc_speak_run(19000,18);       //Zacni prehravat buffer (18Hz emulacni frekvence)
+  puts("Running...");
+  getche();                     //cekej na klavesu
+  puts("Stopping...");
+  pc_speak_stop();              //Zastav prehravani
+  pc_speak_disable();           //PCSPEAKER vrat do normalniho rezimu
+  purge_rm_proc();              //vymaz rm_proc z dolni pameti
+  puts("Ending...");
+  }
+
+void main()
+  {
+  alloc_buffer();               //Alokuj buffer
+  speaker_test();               //Test
+  dealloc_buffer();             //Dealokuj buffer
+  }