Dynamic PreCallback_obj::__Field(const ::String &inName,bool inCallProp)
{
switch(inName.length) {
case 4:
if (HX_FIELD_EQ(inName,"int2") ) { return get_int2(); }
if (HX_FIELD_EQ(inName,"int1") ) { return get_int1(); }
break;
case 7:
if (HX_FIELD_EQ(inName,"swapped") ) { return get_swapped(); }
if (HX_FIELD_EQ(inName,"arbiter") ) { return get_arbiter(); }
break;
case 8:
if (HX_FIELD_EQ(inName,"toString") ) { return toString_dyn(); }
if (HX_FIELD_EQ(inName,"get_int2") ) { return get_int2_dyn(); }
if (HX_FIELD_EQ(inName,"get_int1") ) { return get_int1_dyn(); }
break;
case 11:
if (HX_FIELD_EQ(inName,"get_swapped") ) { return get_swapped_dyn(); }
if (HX_FIELD_EQ(inName,"get_arbiter") ) { return get_arbiter_dyn(); }
}
return super::__Field(inName,inCallProp);
}
/* returns 0 in case of failure */
static unsigned int guess_mjpeg_type(unsigned char *data, unsigned int size,
int d_height) {
unsigned int p;
int marker, length, height, i, hf[3], vf[3];
unsigned int app0 = 0, header = 0;
/* The initial marker must be SIO */
if (size < 2) {
ERROR("JPEG data too short (%d bytes)\n", size);
return 0;
}
if (data[0] != 0xFF || data[1] != M_SOI) {
ERROR("JPEG data must start with FFD8, but doesn't\n");
return 0;
}
p = 2; /* pointer within jpeg data */
while (p < size) {
/* search 0xFF */
while(data[p] != 0xFF) {
p++;
if (p >= size) return 0;
}
/* get marker code, skip duplicate FF's */
while(data[p] == 0xFF) {
p++;
if (p >= size) return 0;
}
marker = data[p++];
/* marker may have an associated length */
if (p <= size - 2) length = get_int2(data+p);
else length = 0;
switch (marker) {
case M_SOF0:
case M_SOF1:
header = p-2;
VERBOSE("found offset of header %u\n",
header);
break;
case M_SOS:
size = 0;
continue;
case M_APP0:
app0 = p-2;
VERBOSE("found offset of APP0 %u\n",
app0);
break;
}
/* these markers shouldn't have parameters,
* i.e. we don't need to skip anaything */
if (marker == 0 || marker == 1 ||
(marker >= 0xd0 && marker < 0xd8))
continue;
if (p + length <= size) p += length;
else {
ERROR("input JPEG too short, data missing\n");
return 0;
}
}
if (!header) {
ERROR("JPEG header (with resolution and sampling factors) not found\n");
return 0;
}
if (data[header + 9] != 3) {
ERROR("JPEG has wrong number of components\n");
return 0;
}
/* get the horizontal and vertical sample factors */
for (i = 0; i < 3; i++) {
hf[i] = data[header + 10 + 3*i + 1]>>4;
vf[i] = data[header + 10 + 3*i + 1]&0x0F;
}
if (hf[0] != 2 || hf[1] != 1 || hf[2] != 1 ||
vf[0] != 1 || vf[1] != 1 || vf[2] != 1) {
ERROR("JPEG has wrong internal image format\n");
} else VERBOSE("JPEG has colorspace YUV422 with minimal sampling factors (good)\n");
height = get_int2(data + header + 5);
if (height == d_height) {
VERBOSE("data is non interlaced\n");
return IMGFMT_ZRMJPEGNI;
}
if (2*height != d_height) {
ERROR("something very inconsistent happened\n");
return 0;
}
if (app0 && get_int2(data + app0 + 2) >= 5 &&
strncasecmp((char*)(data + app0 + 4), "AVI1", 4) == 0) {
if (data[app0+8] == 1) {
VERBOSE("data is interlaced, APP0: top-first (1)\n");
return IMGFMT_ZRMJPEGIT;
} else {
VERBOSE("data is interlaced, APP0: bottom-first (%d)\n",
data[app0+8]);
return IMGFMT_ZRMJPEGIB;
}
} else {
VERBOSE("data is interlaced, no (valid) APP0 marker, "
"guessing top-first\n");
return IMGFMT_ZRMJPEGIT;
}
return 0;
}
