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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 | /*
* 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>
*
* based on jdatasrc.c and jdatadst.c from the Independent
* JPEG Group's software by Thomas G. Lane
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#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)
*/
int decode_jpeg_raw (unsigned char *jpeg_data, int len,
int itype, int ctype, int width, 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, int width, 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, int width, int height,
unsigned char *raw0, unsigned char *raw1,
unsigned char *raw2);
/*
void jpeg_skip_ff (j_decompress_ptr cinfo);
*/
#endif
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