File size: 23,139 Bytes
9375c9a
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
<html><!-- Created using the cpp_pretty_printer from the dlib C++ library.  See http://dlib.net for updates. --><head><title>dlib C++ Library - jdatasrc.c</title></head><body bgcolor='white'><pre>
<font color='#009900'>/*
 * jdatasrc.c
 *
 * Copyright (C) 1994-1996, Thomas G. Lane.
 * Modified 2009-2011 by Guido Vollbeding.
 * This file is part of the Independent JPEG Group's software.
 * For conditions of distribution and use, see the accompanying README file.
 *
 * This file contains decompression data source routines for the case of
 * reading JPEG data from memory or from a file (or any stdio stream).
 * While these routines are sufficient for most applications,
 * some will want to use a different source manager.
 * IMPORTANT: we assume that fread() will correctly transcribe an array of
 * JOCTETs from 8-bit-wide elements on external storage.  If char is wider
 * than 8 bits on your machine, you may need to do some tweaking.
 */</font>

<font color='#009900'>/* this is not a core library module, so it doesn't define JPEG_INTERNALS */</font>
<font color='#0000FF'>#include</font> "<a style='text-decoration:none' href='jinclude.h.html'>jinclude.h</a>"
<font color='#0000FF'>#include</font> "<a style='text-decoration:none' href='jpeglib.h.html'>jpeglib.h</a>"
<font color='#0000FF'>#include</font> "<a style='text-decoration:none' href='jerror.h.html'>jerror.h</a>"


<font color='#009900'>/* Expanded data source object for stdio input */</font>

<font color='#0000FF'>typedef</font> <font color='#0000FF'>struct</font> <b>{</b>
  <font color='#0000FF'>struct</font> jpeg_source_mgr pub;	<font color='#009900'>/* public fields */</font>

  FILE <font color='#5555FF'>*</font> infile;		<font color='#009900'>/* source stream */</font>
  JOCTET <font color='#5555FF'>*</font> buffer;		<font color='#009900'>/* start of buffer */</font>
  boolean start_of_file;	<font color='#009900'>/* have we gotten any data yet? */</font>
<b>}</b> my_source_mgr;

<font color='#0000FF'>typedef</font> my_source_mgr <font color='#5555FF'>*</font> my_src_ptr;

<font color='#0000FF'>#define</font> INPUT_BUF_SIZE  <font color='#979000'>4096</font>	<font color='#009900'>/* choose an efficiently fread'able size */</font>


<font color='#009900'>/*
 * Initialize source --- called by jpeg_read_header
 * before any data is actually read.
 */</font>

<b><a name='METHODDEF'></a>METHODDEF</b><font face='Lucida Console'>(</font><font color='#0000FF'><u>void</u></font><font face='Lucida Console'>)</font>
<b><a name='init_source'></a>init_source</b> <font face='Lucida Console'>(</font>j_decompress_ptr cinfo<font face='Lucida Console'>)</font>
<b>{</b>
  my_src_ptr src <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>my_src_ptr<font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>src;

  <font color='#009900'>/* We reset the empty-input-file flag for each image,
   * but we don't clear the input buffer.
   * This is correct behavior for reading a series of images from one source.
   */</font>
  src<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>start_of_file <font color='#5555FF'>=</font> TRUE;
<b>}</b>

<b><a name='METHODDEF'></a>METHODDEF</b><font face='Lucida Console'>(</font><font color='#0000FF'><u>void</u></font><font face='Lucida Console'>)</font>
<b><a name='init_mem_source'></a>init_mem_source</b> <font face='Lucida Console'>(</font>j_decompress_ptr cinfo<font face='Lucida Console'>)</font>
<b>{</b>
  <font color='#009900'>/* no work necessary here */</font>
<b>}</b>


<font color='#009900'>/*
 * Fill the input buffer --- called whenever buffer is emptied.
 *
 * In typical applications, this should read fresh data into the buffer
 * (ignoring the current state of next_input_byte &amp; bytes_in_buffer),
 * reset the pointer &amp; count to the start of the buffer, and return TRUE
 * indicating that the buffer has been reloaded.  It is not necessary to
 * fill the buffer entirely, only to obtain at least one more byte.
 *
 * There is no such thing as an EOF return.  If the end of the file has been
 * reached, the routine has a choice of ERREXIT() or inserting fake data into
 * the buffer.  In most cases, generating a warning message and inserting a
 * fake EOI marker is the best course of action --- this will allow the
 * decompressor to output however much of the image is there.  However,
 * the resulting error message is misleading if the real problem is an empty
 * input file, so we handle that case specially.
 *
 * In applications that need to be able to suspend compression due to input
 * not being available yet, a FALSE return indicates that no more data can be
 * obtained right now, but more may be forthcoming later.  In this situation,
 * the decompressor will return to its caller (with an indication of the
 * number of scanlines it has read, if any).  The application should resume
 * decompression after it has loaded more data into the input buffer.  Note
 * that there are substantial restrictions on the use of suspension --- see
 * the documentation.
 *
 * When suspending, the decompressor will back up to a convenient restart point
 * (typically the start of the current MCU). next_input_byte &amp; bytes_in_buffer
 * indicate where the restart point will be if the current call returns FALSE.
 * Data beyond this point must be rescanned after resumption, so move it to
 * the front of the buffer rather than discarding it.
 */</font>

<b><a name='METHODDEF'></a>METHODDEF</b><font face='Lucida Console'>(</font>boolean<font face='Lucida Console'>)</font>
<b><a name='fill_input_buffer'></a>fill_input_buffer</b> <font face='Lucida Console'>(</font>j_decompress_ptr cinfo<font face='Lucida Console'>)</font>
<b>{</b>
  my_src_ptr src <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>my_src_ptr<font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>src;
  <font color='#0000FF'><u>size_t</u></font> nbytes;

  nbytes <font color='#5555FF'>=</font> <font color='#BB00BB'>JFREAD</font><font face='Lucida Console'>(</font>src<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>infile, src<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>buffer, INPUT_BUF_SIZE<font face='Lucida Console'>)</font>;

  <font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>nbytes <font color='#5555FF'>&lt;</font><font color='#5555FF'>=</font> <font color='#979000'>0</font><font face='Lucida Console'>)</font> <b>{</b>
    <font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>src<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>start_of_file<font face='Lucida Console'>)</font>	<font color='#009900'>/* Treat empty input file as fatal error */</font>
      <font color='#BB00BB'>ERREXIT</font><font face='Lucida Console'>(</font>cinfo, JERR_INPUT_EMPTY<font face='Lucida Console'>)</font>;
    <font color='#BB00BB'>WARNMS</font><font face='Lucida Console'>(</font>cinfo, JWRN_JPEG_EOF<font face='Lucida Console'>)</font>;
    <font color='#009900'>/* Insert a fake EOI marker */</font>
    src<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>buffer[<font color='#979000'>0</font>] <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>JOCTET<font face='Lucida Console'>)</font> <font color='#979000'>0xFF</font>;
    src<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>buffer[<font color='#979000'>1</font>] <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>JOCTET<font face='Lucida Console'>)</font> JPEG_EOI;
    nbytes <font color='#5555FF'>=</font> <font color='#979000'>2</font>;
  <b>}</b>

  src<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>pub.next_input_byte <font color='#5555FF'>=</font> src<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>buffer;
  src<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>pub.bytes_in_buffer <font color='#5555FF'>=</font> nbytes;
  src<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>start_of_file <font color='#5555FF'>=</font> FALSE;

  <font color='#0000FF'>return</font> TRUE;
<b>}</b>

<b><a name='METHODDEF'></a>METHODDEF</b><font face='Lucida Console'>(</font>boolean<font face='Lucida Console'>)</font>
<b><a name='fill_mem_input_buffer'></a>fill_mem_input_buffer</b> <font face='Lucida Console'>(</font>j_decompress_ptr cinfo<font face='Lucida Console'>)</font>
<b>{</b>
  <font color='#0000FF'>static</font> <font color='#0000FF'>const</font> JOCTET mybuffer[<font color='#979000'>4</font>] <font color='#5555FF'>=</font> <b>{</b>
    <font face='Lucida Console'>(</font>JOCTET<font face='Lucida Console'>)</font> <font color='#979000'>0xFF</font>, <font face='Lucida Console'>(</font>JOCTET<font face='Lucida Console'>)</font> JPEG_EOI, <font color='#979000'>0</font>, <font color='#979000'>0</font>
  <b>}</b>;

  <font color='#009900'>/* The whole JPEG data is expected to reside in the supplied memory
   * buffer, so any request for more data beyond the given buffer size
   * is treated as an error.
   */</font>
  <font color='#BB00BB'>WARNMS</font><font face='Lucida Console'>(</font>cinfo, JWRN_JPEG_EOF<font face='Lucida Console'>)</font>;

  <font color='#009900'>/* Insert a fake EOI marker */</font>

  cinfo<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>src<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>next_input_byte <font color='#5555FF'>=</font> mybuffer;
  cinfo<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>src<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>bytes_in_buffer <font color='#5555FF'>=</font> <font color='#979000'>2</font>;

  <font color='#0000FF'>return</font> TRUE;
<b>}</b>


<font color='#009900'>/*
 * Skip data --- used to skip over a potentially large amount of
 * uninteresting data (such as an APPn marker).
 *
 * Writers of suspendable-input applications must note that skip_input_data
 * is not granted the right to give a suspension return.  If the skip extends
 * beyond the data currently in the buffer, the buffer can be marked empty so
 * that the next read will cause a fill_input_buffer call that can suspend.
 * Arranging for additional bytes to be discarded before reloading the input
 * buffer is the application writer's problem.
 */</font>

<b><a name='METHODDEF'></a>METHODDEF</b><font face='Lucida Console'>(</font><font color='#0000FF'><u>void</u></font><font face='Lucida Console'>)</font>
<b><a name='skip_input_data'></a>skip_input_data</b> <font face='Lucida Console'>(</font>j_decompress_ptr cinfo, <font color='#0000FF'><u>long</u></font> num_bytes<font face='Lucida Console'>)</font>
<b>{</b>
  <font color='#0000FF'>struct</font> jpeg_source_mgr <font color='#5555FF'>*</font> src <font color='#5555FF'>=</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>src;

  <font color='#009900'>/* Just a dumb implementation for now.  Could use fseek() except
   * it doesn't work on pipes.  Not clear that being smart is worth
   * any trouble anyway --- large skips are infrequent.
   */</font>
  <font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>num_bytes <font color='#5555FF'>&gt;</font> <font color='#979000'>0</font><font face='Lucida Console'>)</font> <b>{</b>
    <font color='#0000FF'>while</font> <font face='Lucida Console'>(</font>num_bytes <font color='#5555FF'>&gt;</font> <font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> src<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>bytes_in_buffer<font face='Lucida Console'>)</font> <b>{</b>
      num_bytes <font color='#5555FF'>-</font><font color='#5555FF'>=</font> <font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> src<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>bytes_in_buffer;
      <font face='Lucida Console'>(</font><font color='#0000FF'><u>void</u></font><font face='Lucida Console'>)</font> <font face='Lucida Console'>(</font><font color='#5555FF'>*</font>src<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>fill_input_buffer<font face='Lucida Console'>)</font> <font face='Lucida Console'>(</font>cinfo<font face='Lucida Console'>)</font>;
      <font color='#009900'>/* note we assume that fill_input_buffer will never return FALSE,
       * so suspension need not be handled.
       */</font>
    <b>}</b>
    src<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>next_input_byte <font color='#5555FF'>+</font><font color='#5555FF'>=</font> <font face='Lucida Console'>(</font><font color='#0000FF'><u>size_t</u></font><font face='Lucida Console'>)</font> num_bytes;
    src<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>bytes_in_buffer <font color='#5555FF'>-</font><font color='#5555FF'>=</font> <font face='Lucida Console'>(</font><font color='#0000FF'><u>size_t</u></font><font face='Lucida Console'>)</font> num_bytes;
  <b>}</b>
<b>}</b>


<font color='#009900'>/*
 * An additional method that can be provided by data source modules is the
 * resync_to_restart method for error recovery in the presence of RST markers.
 * For the moment, this source module just uses the default resync method
 * provided by the JPEG library.  That method assumes that no backtracking
 * is possible.
 */</font>


<font color='#009900'>/*
 * Terminate source --- called by jpeg_finish_decompress
 * after all data has been read.  Often a no-op.
 *
 * NB: *not* called by jpeg_abort or jpeg_destroy; surrounding
 * application must deal with any cleanup that should happen even
 * for error exit.
 */</font>

<b><a name='METHODDEF'></a>METHODDEF</b><font face='Lucida Console'>(</font><font color='#0000FF'><u>void</u></font><font face='Lucida Console'>)</font>
<b><a name='term_source'></a>term_source</b> <font face='Lucida Console'>(</font>j_decompress_ptr cinfo<font face='Lucida Console'>)</font>
<b>{</b>
  <font color='#009900'>/* no work necessary here */</font>
<b>}</b>


<font color='#009900'>/*
 * Prepare for input from a stdio stream.
 * The caller must have already opened the stream, and is responsible
 * for closing it after finishing decompression.
 */</font>

<b><a name='GLOBAL'></a>GLOBAL</b><font face='Lucida Console'>(</font><font color='#0000FF'><u>void</u></font><font face='Lucida Console'>)</font>
<b><a name='jpeg_stdio_src'></a>jpeg_stdio_src</b> <font face='Lucida Console'>(</font>j_decompress_ptr cinfo, FILE <font color='#5555FF'>*</font> infile<font face='Lucida Console'>)</font>
<b>{</b>
  my_src_ptr src;

  <font color='#009900'>/* The source object and input buffer are made permanent so that a series
   * of JPEG images can be read from the same file by calling jpeg_stdio_src
   * only before the first one.  (If we discarded the buffer at the end of
   * one image, we'd likely lose the start of the next one.)
   * This makes it unsafe to use this manager and a different source
   * manager serially with the same JPEG object.  Caveat programmer.
   */</font>
  <font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>cinfo<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>src <font color='#5555FF'>=</font><font color='#5555FF'>=</font> NULL<font face='Lucida Console'>)</font> <b>{</b>	<font color='#009900'>/* first time for this JPEG object? */</font>
    cinfo<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>src <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font><font color='#0000FF'>struct</font> jpeg_source_mgr <font color='#5555FF'>*</font><font face='Lucida Console'>)</font>
      <font face='Lucida Console'>(</font><font color='#5555FF'>*</font>cinfo<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>mem<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>alloc_small<font face='Lucida Console'>)</font> <font face='Lucida Console'>(</font><font face='Lucida Console'>(</font>j_common_ptr<font face='Lucida Console'>)</font> cinfo, JPOOL_PERMANENT,
				  <font color='#BB00BB'>SIZEOF</font><font face='Lucida Console'>(</font>my_source_mgr<font face='Lucida Console'>)</font><font face='Lucida Console'>)</font>;
    src <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>my_src_ptr<font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>src;
    src<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>buffer <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>JOCTET <font color='#5555FF'>*</font><font face='Lucida Console'>)</font>
      <font face='Lucida Console'>(</font><font color='#5555FF'>*</font>cinfo<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>mem<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>alloc_small<font face='Lucida Console'>)</font> <font face='Lucida Console'>(</font><font face='Lucida Console'>(</font>j_common_ptr<font face='Lucida Console'>)</font> cinfo, JPOOL_PERMANENT,
				  INPUT_BUF_SIZE <font color='#5555FF'>*</font> <font color='#BB00BB'>SIZEOF</font><font face='Lucida Console'>(</font>JOCTET<font face='Lucida Console'>)</font><font face='Lucida Console'>)</font>;
  <b>}</b>

  src <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>my_src_ptr<font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>src;
  src<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>pub.init_source <font color='#5555FF'>=</font> init_source;
  src<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>pub.fill_input_buffer <font color='#5555FF'>=</font> fill_input_buffer;
  src<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>pub.skip_input_data <font color='#5555FF'>=</font> skip_input_data;
  src<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>pub.resync_to_restart <font color='#5555FF'>=</font> jpeg_resync_to_restart; <font color='#009900'>/* use default method */</font>
  src<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>pub.term_source <font color='#5555FF'>=</font> term_source;
  src<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>infile <font color='#5555FF'>=</font> infile;
  src<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>pub.bytes_in_buffer <font color='#5555FF'>=</font> <font color='#979000'>0</font>; <font color='#009900'>/* forces fill_input_buffer on first read */</font>
  src<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>pub.next_input_byte <font color='#5555FF'>=</font> NULL; <font color='#009900'>/* until buffer loaded */</font>
<b>}</b>


<font color='#009900'>/*
 * Prepare for input from a supplied memory buffer.
 * The buffer must contain the whole JPEG data.
 */</font>

<b><a name='GLOBAL'></a>GLOBAL</b><font face='Lucida Console'>(</font><font color='#0000FF'><u>void</u></font><font face='Lucida Console'>)</font>
<b><a name='jpeg_mem_src'></a>jpeg_mem_src</b> <font face='Lucida Console'>(</font>j_decompress_ptr cinfo,
	      <font color='#0000FF'><u>unsigned</u></font> <font color='#0000FF'><u>char</u></font> <font color='#5555FF'>*</font> inbuffer, <font color='#0000FF'><u>unsigned</u></font> <font color='#0000FF'><u>long</u></font> insize<font face='Lucida Console'>)</font>
<b>{</b>
  <font color='#0000FF'>struct</font> jpeg_source_mgr <font color='#5555FF'>*</font> src;

  <font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>inbuffer <font color='#5555FF'>=</font><font color='#5555FF'>=</font> NULL <font color='#5555FF'>|</font><font color='#5555FF'>|</font> insize <font color='#5555FF'>=</font><font color='#5555FF'>=</font> <font color='#979000'>0</font><font face='Lucida Console'>)</font>	<font color='#009900'>/* Treat empty input as fatal error */</font>
    <font color='#BB00BB'>ERREXIT</font><font face='Lucida Console'>(</font>cinfo, JERR_INPUT_EMPTY<font face='Lucida Console'>)</font>;

  <font color='#009900'>/* The source object is made permanent so that a series of JPEG images
   * can be read from the same buffer by calling jpeg_mem_src only before
   * the first one.
   */</font>
  <font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>cinfo<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>src <font color='#5555FF'>=</font><font color='#5555FF'>=</font> NULL<font face='Lucida Console'>)</font> <b>{</b>	<font color='#009900'>/* first time for this JPEG object? */</font>
    cinfo<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>src <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font><font color='#0000FF'>struct</font> jpeg_source_mgr <font color='#5555FF'>*</font><font face='Lucida Console'>)</font>
      <font face='Lucida Console'>(</font><font color='#5555FF'>*</font>cinfo<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>mem<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>alloc_small<font face='Lucida Console'>)</font> <font face='Lucida Console'>(</font><font face='Lucida Console'>(</font>j_common_ptr<font face='Lucida Console'>)</font> cinfo, JPOOL_PERMANENT,
				  <font color='#BB00BB'>SIZEOF</font><font face='Lucida Console'>(</font><font color='#0000FF'>struct</font> <b><a name='jpeg_source_mgr'></a>jpeg_source_mgr</b><font face='Lucida Console'>)</font><font face='Lucida Console'>)</font>;
  <b>}</b>

  src <font color='#5555FF'>=</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>src;
  src<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>init_source <font color='#5555FF'>=</font> init_mem_source;
  src<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>fill_input_buffer <font color='#5555FF'>=</font> fill_mem_input_buffer;
  src<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>skip_input_data <font color='#5555FF'>=</font> skip_input_data;
  src<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>resync_to_restart <font color='#5555FF'>=</font> jpeg_resync_to_restart; <font color='#009900'>/* use default method */</font>
  src<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>term_source <font color='#5555FF'>=</font> term_source;
  src<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>bytes_in_buffer <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font><font color='#0000FF'><u>size_t</u></font><font face='Lucida Console'>)</font> insize;
  src<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>next_input_byte <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>JOCTET <font color='#5555FF'>*</font><font face='Lucida Console'>)</font> inbuffer;
<b>}</b>

</pre></body></html>