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// mga_vid drawing functions
static void
write_frame_g200(uint8_t *y,uint8_t *cr, uint8_t *cb)
{
uint8_t *dest;
uint32_t bespitch,h,w;
dest = vid_data;
bespitch = (mga_vid_config.src_width + 31) & ~31;
for(h=0; h < mga_vid_config.src_height; h++)
{
memcpy(dest, y, mga_vid_config.src_width);
y += mga_vid_config.src_width;
dest += bespitch;
}
for(h=0; h < mga_vid_config.src_height/2; h++)
{
for(w=0; w < mga_vid_config.src_width/2; w++)
{
*dest++ = *cb++;
*dest++ = *cr++;
}
dest += bespitch - mga_vid_config.src_width;
}
}
static void
write_frame_g400(uint8_t *y,uint8_t *cr, uint8_t *cb)
{
uint8_t *dest;
uint32_t bespitch,h;
dest = vid_data;
bespitch = (mga_vid_config.src_width + 31) & ~31;
for(h=0; h < mga_vid_config.src_height; h++)
{
memcpy(dest, y, mga_vid_config.src_width);
y += mga_vid_config.src_width;
dest += bespitch;
}
for(h=0; h < mga_vid_config.src_height/2; h++)
{
memcpy(dest, cb, mga_vid_config.src_width/2);
cb += mga_vid_config.src_width/2;
dest += bespitch/2;
}
for(h=0; h < mga_vid_config.src_height/2; h++)
{
memcpy(dest, cr, mga_vid_config.src_width/2);
cr += mga_vid_config.src_width/2;
dest += bespitch/2;
}
}
//static void
//write_slice_g200(uint8_t *y,uint8_t *cr, uint8_t *cb,uint32_t slice_num)
static void
draw_slice_g200(uint8_t *image[], int stride[], int width,int height,int x,int y)
{
uint8_t *src;
uint8_t *src2;
uint8_t *dest;
uint32_t bespitch,h,w;
bespitch = (mga_vid_config.src_width + 31) & ~31;
dest = vid_data + bespitch * y * x;
src = image[0];
for(h=0; h < height; h++)
{
memcpy(dest, src, width);
src += stride[0];
dest += bespitch;
}
width/=2;height/=2;x/=2;y/=2;
dest = vid_data + bespitch * mga_vid_config.src_height +
bespitch * y + 2*x;
src = image[1];
src2 = image[2];
for(h=0; h < height; h++)
{
for(w=0; w < width; w++)
{
dest[2*w+0] = src[w];
dest[2*w+1] = src2[w];
}
dest += bespitch;
src += stride[1];
src2+= stride[2];
}
}
static void
draw_slice_g400(uint8_t *image[], int stride[], int w,int h,int x,int y)
{
uint8_t *src;
uint8_t *dest;
uint32_t bespitch,bespitch2;
int i;
bespitch = (mga_vid_config.src_width + 31) & ~31;
bespitch2 = bespitch/2;
dest = vid_data + bespitch * y + x;
src = image[0];
for(i=0;i<h;i++){
memcpy(dest,src,w);
src+=stride[0];
dest += bespitch;
}
w/=2;h/=2;x/=2;y/=2;
dest = vid_data + bespitch*mga_vid_config.src_height + bespitch2 * y + x;
src = image[1];
for(i=0;i<h;i++){
memcpy(dest,src,w);
src+=stride[1];
dest += bespitch2;
}
dest = vid_data + bespitch*mga_vid_config.src_height
+ bespitch*mga_vid_config.src_height / 4
+ bespitch2 * y + x;
src = image[2];
for(i=0;i<h;i++){
memcpy(dest,src,w);
src+=stride[2];
dest += bespitch2;
}
}
static uint32_t
draw_slice(uint8_t *src[], int stride[], int w,int h,int x,int y)
{
if (mga_vid_config.card_type == MGA_G200)
draw_slice_g200(src,stride,w,h,x,y);
else
draw_slice_g400(src,stride,w,h,x,y);
return 0;
}
static void
flip_page(void)
{
#if 0
ioctl(f,MGA_VID_FSEL,&next_frame);
if (next_frame)
vid_data = frame1;
else
vid_data = frame0;
next_frame = 2 - next_frame; // switch between fields A1 and B1
#endif
}
static void
write_frame_yuy2(uint8_t *y)
{
uint8_t *dest;
uint32_t bespitch,h;
int len=2*mga_vid_config.src_width;
dest = vid_data;
bespitch = (mga_vid_config.src_width + 31) & ~31;
// y+=2*mga_vid_config.src_width*mga_vid_config.src_height;
for(h=0; h < mga_vid_config.src_height; h++)
{
// y -= 2*mga_vid_config.src_width;
memcpy(dest, y, len);
y += len;
dest += 2*bespitch;
}
}
static uint32_t
draw_frame(uint8_t *src[])
{
if (mga_vid_config.format==MGA_VID_FORMAT_YUY2)
write_frame_yuy2(src[0]);
else
if (mga_vid_config.card_type == MGA_G200)
write_frame_g200(src[0], src[2], src[1]);
else
write_frame_g400(src[0], src[2], src[1]);
//flip_page();
return 0;
}
static uint32_t
query_format(uint32_t format)
{
switch(format){
case IMGFMT_YV12:
case IMGFMT_YUY2:
// case IMGFMT_RGB|24:
// case IMGFMT_BGR|24:
return 1;
}
return 0;
}
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