1 2 #ifndef _JPEG_DECODER_H_ 3 #define _JPEG_DECODER_H_ 4 5 #include <stdint.h> 6 7 #define JPEG_MARKER_STUFFED 0x00 8 #define JPEG_MARKER_TEM 0x01 9 #define JPEG_MARKER_RES 0x02 10 11 #define JPEG_MARKER_SOF_0 0xc0 12 #define JPEG_MARKER_SOF_1 0xc1 13 #define JPEG_MARKER_SOF_2 0xc2 14 #define JPEG_MARKER_SOF_3 0xc3 15 #define JPEG_MARKER_DEFINE_HUFFMAN_TABLES 0xc4 16 #define JPEG_MARKER_SOF_5 0xc5 17 #define JPEG_MARKER_SOF_6 0xc6 18 #define JPEG_MARKER_SOF_7 0xc7 19 #define JPEG_MARKER_JPG 0xc8 20 #define JPEG_MARKER_SOF_9 0xc9 21 #define JPEG_MARKER_SOF_10 0xca 22 #define JPEG_MARKER_SOF_11 0xcb 23 #define JPEG_MARKER_DEFINE_ARITHMETIC_CONDITIONING 0xcc 24 #define JPEG_MARKER_SOF_13 0xcd 25 #define JPEG_MARKER_SOF_14 0xce 26 #define JPEG_MARKER_SOF_15 0xcf 27 28 #define JPEG_MARKER_RST_0 0xd0 29 #define JPEG_MARKER_RST_1 0xd1 30 #define JPEG_MARKER_RST_2 0xd2 31 #define JPEG_MARKER_RST_3 0xd3 32 #define JPEG_MARKER_RST_4 0xd4 33 #define JPEG_MARKER_RST_5 0xd5 34 #define JPEG_MARKER_RST_6 0xd6 35 #define JPEG_MARKER_RST_7 0xd7 36 37 #define JPEG_MARKER_SOI 0xd8 38 #define JPEG_MARKER_EOI 0xd9 39 #define JPEG_MARKER_SOS 0xda 40 #define JPEG_MARKER_DEFINE_QUANTIZATION_TABLES 0xdb 41 #define JPEG_MARKER_DNL 0xdc 42 #define JPEG_MARKER_DEFINE_RESTART_INTERVAL 0xdd 43 #define JPEG_MARKER_DHP 0xde 44 #define JPEG_MARKER_EXP 0xdf 45 #define JPEG_MARKER_APP(x) (0xe0 + (x)) 46 #define JPEG_MARKER_JPG_(x) (0xf0 + (x)) 47 #define JPEG_MARKER_COMMENT 0xfe 48 49 #define JPEG_MARKER_JFIF JPEG_MARKER_APP(0) 50 51 #define JPEG_MARKER_IS_START_OF_FRAME(x) ((x)>=0xc0 && (x) <= 0xcf && (x)!=0xc4 && (x)!=0xc8 && (x)!=0xcc) 52 #define JPEG_MARKER_IS_APP(x) ((x)>=0xe0 && (x) <= 0xef) 53 #define JPEG_MARKER_IS_RESET(x) ((x)>=0xd0 && (x)<=0xd7) 54 55 56 typedef struct _JpegDecoder JpegDecoder; 57 58 59 JpegDecoder *jpeg_decoder_new(void); 60 void jpeg_decoder_free(JpegDecoder *dec); 61 int jpeg_decoder_addbits(JpegDecoder *dec, unsigned char *data, unsigned int len); 62 int jpeg_decoder_decode (JpegDecoder *dec); 63 int jpeg_decoder_get_image_size(JpegDecoder *dec, int *width, int *height); 64 int jpeg_decoder_get_component_size(JpegDecoder *dec, int id, 65 int *width, int *height); 66 int jpeg_decoder_get_component_subsampling(JpegDecoder *dec, int id, 67 int *h_subsample, int *v_subsample); 68 int jpeg_decoder_get_component_ptr(JpegDecoder *dec, int id, 69 unsigned char **image, int *rowstride); 70 71 unsigned char *jpeg_decoder_get_argb_image (JpegDecoder *dec); 72 int jpeg_decode_argb (uint8_t *data, int length, uint32_t **image, 73 int *width, int *height); 74 75 #endif 76 77