From Bug #36: There are a couple of issues with the selection of Altivec alpha-blitting routines in CalculateAlphaBlit() in src/video/SDL_Blit_A.c. 1) There's no check for the presence of Altivec when checking if the Blit32to565PixelAlphaAltivec() routine can be selected. 2) Altivec cannot be used in video memory, and there's no check if the destination surface is a hardware surface. (Alpha-blitting to a hardware surface with GPU support is a bad idea, but somebody's bound to do it anyway.) Patch to fix these attached.

#ifndef _AICA_H_
#define _AICA_H_

#define	AICA_MEM	0xa0800000

#define SM_8BIT		1
#define SM_16BIT	0
#define SM_ADPCM	2

void aica_play(int ch,int mode,unsigned long smpptr,int looptst,int loopend,int freq,int vol,int pan,int loopflag);
void aica_stop(int ch);
void aica_vol(int ch,int vol);
void aica_pan(int ch,int pan);
void aica_freq(int ch,int freq);
int aica_get_pos(int ch);

#endif