struct jai_gfxinfo {
/** 0 for baseline JPEG, 1..15 for other JPEG compression */
unsigned char SOF_type;
unsigned char colorspace;
unsigned char bad, bpc, cpp, had_jfif, colortransform, id_rgb;
/** (Horiz<<4+Vert) sampling factor for the first color component. Usually
* 0x11, but TIFF defaults to 0x22.
*/
unsigned char hvs;
/*Image::Sampled::dimen_t*/slen_t height, width;
/** Offset of byte just _after_ the first SOF marker (FF C0 or alike)
* from the beginning of the file.
*/
slen_t SOF_offs;
};
extern char const*jai_errors[];
#if 0
extern void jai_parse_jpeg(struct gfxinfo *result, Filter::FlatR *f);
extern void jai_parse_jpeg(struct gfxinfo *result, FILE *f);
#else
extern void jai_parse_jpeg(struct jai_gfxinfo *result, DecoderTeller *fp, bool must_be_baseline=true);
/** Doesn't treat `-' as a special filename. @return 0, 1, or -1 on I/O error */
extern int jai_is_baseline_jpeg(char const* filename);
extern int jai_is_baseline_jpeg(/*DecoderTeller*/ Filter::UngetFILED *fp);
#endif
