void host_video_blit4(const unsigned char *src, int w, int h, int stride);
void host_video_blit8(const unsigned char *src, int w, int h, int stride);
void host_video_blit16(const unsigned short *src, int w, int h, int stride);
void host_video_blit4(const unsigned char *src, int w, int h, int stride);
void host_video_blit8(const unsigned char *src, int w, int h, int stride);
void host_video_blit16(const unsigned short *src, int w, int h, int stride);