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/*
* jpegutils.h: Some Utility programs for dealing with
* JPEG encoded images
*
* Copyright (C) 1999 Rainer Johanni <Rainer@Johanni.de>
* Copyright (C) 2001 pHilipp Zabel <pzabel@gmx.de>
* Copyright (C) 2008 Angel Carpintero <ack@telenfonica.net>
*
*/
#ifndef __JPEGUTILS_H__
#define __JPEGUTILS_H__
/*
* jpeg_data: buffer with input / output jpeg
* len: Length of jpeg buffer
* itype: Y4M_ILACE_NONE: Not interlaced
* Y4M_ILACE_TOP_FIRST: Interlaced, top-field-first
* Y4M_ILACE_BOTTOM_FIRST: Interlaced, bottom-field-first
* ctype Chroma format for decompression.
* Currently always 420 and hence ignored.
* raw0 buffer with input / output raw Y channel
* raw1 buffer with input / output raw U/Cb channel
* raw2 buffer with input / output raw V/Cr channel
* width width of Y channel (width of U/V is width/2)
* height height of Y channel (height of U/V is height/2)
*/
#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 */
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);
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);
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);
#endif
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