AX Voice Parameters

Overview

• Use AXSetVoice* to set voice parameters.
• Voice parameters can also be set directly using the application in the axvpb data structure. This method can save a few CPU cycles. However, you must assert the appropriate synchronization flags in axvpb.sync. Some parameters depend on other parameter settings for proper operation.

Example

#include <revolution.h>

#ifdef SET_PARAMS_WITH_AX_API

AXPBADDR        addr;

addr.loopFlag           = AXPBADDR_LOOP_ON;
addr.format             = AX_PB_FORMAT_ADPCM;
addr.loopAddressHi      = (u16)(loopAddress >> 16);
addr.loopAddressLo      = (u16)(loopAddress & 0xffff);
addr.endAddressHi       = (u16)(endAddress >> 16);
addr.endAddressLo       = (u16)(endAddress & 0xffff);
addr.currentAddressHi   = (u16)(startAddress >> 16);
addr.currentAddressLo   = (u16)(startAddress & 0xffff);

AXSetVoiceAddr(axvpb, &addr);

#else

int old = OSDisableInterrupts();

axvpb->addr.loopFlag           = AXPBADDR_LOOP_ON;
axvpb->addr.format             = AX_PB_FORMAT_ADPCM;
axvpb->addr.loopAddressHi      = (u16)(loopAddress >> 16);
axvpb->addr.loopAddressLo      = (u16)(loopAddress & 0xffff);
axvpb->addr.endAddressHi       = (u16)(endAddress >> 16);
axvpb->addr.endAddressLo       = (u16)(endAddress & 0xffff);
axvpb->addr.currentAddressHi   = (u16)(startAddress >> 16);
axvpb->addr.currentAddressLo   = (u16)(startAddress & 0xffff);
    
axvpb->sync |= AX_SYNC_USER_ADDR;

OSRestoreInterrupts(old);

#endif

// This is only a code example. // You must also set the
// loop context for ADPCM-encoded sounds.

Revision History

03/01/2006 Initial version.