Instrument Neutral Distributed Interface INDI  1.9.5
Macros | Functions
jpegutils.h File Reference
#include <stddef.h>
#include <stdio.h>
#include <inttypes.h>

Go to the source code of this file.

Macros

#define Y4M_ILACE_NONE   0 /** non-interlaced, progressive frame */
 
#define Y4M_ILACE_TOP_FIRST   1 /** interlaced, top-field first */
 
#define Y4M_ILACE_BOTTOM_FIRST   2 /** interlaced, bottom-field first */
 
#define Y4M_ILACE_MIXED   3 /** mixed, "refer to frame header" */
 
#define Y4M_CHROMA_420JPEG   0 /** 4:2:0, H/V centered, for JPEG/MPEG-1 */
 
#define Y4M_CHROMA_420MPEG2   1 /** 4:2:0, H cosited, for MPEG-2 */
 
#define Y4M_CHROMA_420PALDV   2 /** 4:2:0, alternating Cb/Cr, for PAL-DV */
 
#define Y4M_CHROMA_444   3 /** 4:4:4, no subsampling, phew. */
 
#define Y4M_CHROMA_422   4 /** 4:2:2, H cosited */
 
#define Y4M_CHROMA_411   5 /** 4:1:1, H cosited */
 
#define Y4M_CHROMA_MONO   6 /** luma plane only */
 
#define Y4M_CHROMA_444ALPHA   7 /** 4:4:4 with an alpha channel */
 

Functions

int decode_jpeg_raw (unsigned char *jpeg_data, int len, int itype, int ctype, unsigned int width, unsigned int height, unsigned char *raw0, unsigned char *raw1, unsigned char *raw2)
 decode JPEG buffer More...
 
int decode_jpeg_rgb (unsigned char *inBuffer, unsigned long inSize, uint8_t **memptr, size_t *memsize, int *naxis, int *w, int *h)
 decode_jpeg_rgb Read jpeg in memory buffer and produce RGB image More...
 
int decode_jpeg_gray_raw (unsigned char *jpeg_data, int len, int itype, int ctype, unsigned int width, unsigned int height, unsigned char *raw0, unsigned char *raw1, unsigned char *raw2)
 decode JPEG raw gray buffer More...
 
int encode_jpeg_raw (unsigned char *jpeg_data, int len, int quality, int itype, int ctype, unsigned int width, unsigned int height, unsigned char *raw0, unsigned char *raw1, unsigned char *raw2)
 encode raw JPEG buffer More...
 

Macro Definition Documentation

◆ Y4M_CHROMA_411

#define Y4M_CHROMA_411   5 /** 4:1:1, H cosited */

Definition at line 46 of file jpegutils.h.

◆ Y4M_CHROMA_420JPEG

#define Y4M_CHROMA_420JPEG   0 /** 4:2:0, H/V centered, for JPEG/MPEG-1 */

Definition at line 41 of file jpegutils.h.

◆ Y4M_CHROMA_420MPEG2

#define Y4M_CHROMA_420MPEG2   1 /** 4:2:0, H cosited, for MPEG-2 */

Definition at line 42 of file jpegutils.h.

◆ Y4M_CHROMA_420PALDV

#define Y4M_CHROMA_420PALDV   2 /** 4:2:0, alternating Cb/Cr, for PAL-DV */

Definition at line 43 of file jpegutils.h.

◆ Y4M_CHROMA_422

#define Y4M_CHROMA_422   4 /** 4:2:2, H cosited */

Definition at line 45 of file jpegutils.h.

◆ Y4M_CHROMA_444

#define Y4M_CHROMA_444   3 /** 4:4:4, no subsampling, phew. */

Definition at line 44 of file jpegutils.h.

◆ Y4M_CHROMA_444ALPHA

#define Y4M_CHROMA_444ALPHA   7 /** 4:4:4 with an alpha channel */

Definition at line 48 of file jpegutils.h.

◆ Y4M_CHROMA_MONO

#define Y4M_CHROMA_MONO   6 /** luma plane only */

Definition at line 47 of file jpegutils.h.

◆ Y4M_ILACE_BOTTOM_FIRST

#define Y4M_ILACE_BOTTOM_FIRST   2 /** interlaced, bottom-field first */

Definition at line 38 of file jpegutils.h.

◆ Y4M_ILACE_MIXED

#define Y4M_ILACE_MIXED   3 /** mixed, "refer to frame header" */

Definition at line 39 of file jpegutils.h.

◆ Y4M_ILACE_NONE

#define Y4M_ILACE_NONE   0 /** non-interlaced, progressive frame */

Definition at line 36 of file jpegutils.h.

◆ Y4M_ILACE_TOP_FIRST

#define Y4M_ILACE_TOP_FIRST   1 /** interlaced, top-field first */

Definition at line 37 of file jpegutils.h.

Function Documentation

◆ decode_jpeg_gray_raw()

int decode_jpeg_gray_raw ( unsigned char *  jpeg_data,
int  len,
int  itype,
int  ctype,
unsigned int  width,
unsigned int  height,
unsigned char *  raw0,
unsigned char *  raw1,
unsigned char *  raw2 
)

decode JPEG raw gray buffer

Definition at line 837 of file jpegutils.c.

◆ decode_jpeg_raw()

int decode_jpeg_raw ( unsigned char *  jpeg_data,
int  len,
int  itype,
int  ctype,
unsigned int  width,
unsigned int  height,
unsigned char *  raw0,
unsigned char *  raw1,
unsigned char *  raw2 
)

decode JPEG buffer

Definition at line 461 of file jpegutils.c.

◆ decode_jpeg_rgb()

int decode_jpeg_rgb ( unsigned char *  inBuffer,
unsigned long  inSize,
uint8_t **  memptr,
size_t *  memsize,
int *  naxis,
int *  w,
int *  h 
)

decode_jpeg_rgb Read jpeg in memory buffer and produce RGB image

Parameters
inBufferpointer to jpeg file in memory
inSizefile of jpeg file in bytes
memptrpointer to store RGB data. To enhance performance, the memory must be allocated at least byte. memptr = malloc(1) since subsequent calls will use realloc to allocate memory. The caller is responsible for free(*memptr) eventually.
memsizesize of RGB data as determined after jpeg decompression
naxis1 for mono, 3 for color
wwidth of image in pixels
hheight image in pixels
Returns
0 if decoding sucseeds, -1 otherwise.

Definition at line 1309 of file jpegutils.c.

◆ encode_jpeg_raw()

int encode_jpeg_raw ( unsigned char *  jpeg_data,
int  len,
int  quality,
int  itype,
int  ctype,
unsigned int  width,
unsigned int  height,
unsigned char *  raw0,
unsigned char *  raw1,
unsigned char *  raw2 
)

encode raw JPEG buffer

Definition at line 1156 of file jpegutils.c.