apps/recorder/jpeg_load.h

   1 /***************************************************************************
   2 *             __________               __   ___.
   3 *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4 *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5 *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6 *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7 *                     \/            \/     \/    \/            \/
   8 * $Id$
   9 *
  10 * JPEG image viewer
  11 * (This is a real mess if it has to be coded in one single C file)
  12 *
  13 * File scrolling addition (C) 2005 Alexander Spyridakis
  14 * Copyright (C) 2004 Jörg Hohensohn aka [IDC]Dragon
  15 * Heavily borrowed from the IJG implementation (C) Thomas G. Lane
  16 * Small & fast downscaling IDCT (C) 2002 by Guido Vollbeding  JPEGclub.org
  17 *
  18 * This program is free software; you can redistribute it and/or
  19 * modify it under the terms of the GNU General Public License
  20 * as published by the Free Software Foundation; either version 2
  21 * of the License, or (at your option) any later version.
  22 *
  23 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  24 * KIND, either express or implied.
  25 *
  26 ****************************************************************************/
  27
  28 #include "resize.h"
  29 #include "bmp.h"
  30 #include "jpeg_common.h"
  31
  32 #ifndef _JPEG_LOAD_H
  33 #define _JPEG_LOAD_H
  34
  35 int read_jpeg_file(const char* filename,
  36                    struct bitmap *bm,
  37                    int maxsize,
  38                    int format,
  39                    const struct custom_format *cformat);
  40
  41 int read_jpeg_fd(int fd,
  42                  struct bitmap *bm,
  43                  int maxsize,
  44                  int format,
  45                  const struct custom_format *cformat);
  46
  47 /**
  48  * read embedded jpeg files as above. Needs an offset and length into
  49  * the file
  50  **/
  51 int clip_jpeg_file(const char* filename,
  52                    int offset,
  53                    unsigned long jpeg_size,
  54                    struct bitmap *bm,
  55                    int maxsize,
  56                    int format,
  57                    const struct custom_format *cformat);
  58
  59 /**
  60  * read embedded jpeg files as above. Needs an open file descripter, and
  61  * assumes the caller has lseek()'d to the start of the jpeg blob
  62  **/
  63 int clip_jpeg_fd(int fd,
  64                  unsigned long jpeg_size,
  65                  struct bitmap *bm,
  66                  int maxsize,
  67                  int format,
  68                  const struct custom_format *cformat);
  69
  70 #endif /* _JPEG_JPEG_DECODER_H */