jcinit.c
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1 /*
2  * jcinit.c
3  *
4  * Copyright (C) 1991-1997, Thomas G. Lane.
5  * This file is part of the Independent JPEG Group's software.
6  * For conditions of distribution and use, see the accompanying README file.
7  *
8  * This file contains initialization logic for the JPEG compressor.
9  * This routine is in charge of selecting the modules to be executed and
10  * making an initialization call to each one.
11  *
12  * Logically, this code belongs in jcmaster.c. It's split out because
13  * linking this routine implies linking the entire compression library.
14  * For a transcoding-only application, we want to be able to use jcmaster.c
15  * without linking in the whole library.
16  */
17 
18 #define JPEG_INTERNALS
19 #include "jinclude.h"
20 #include "jpeglib.h"
21 
22 
23 /*
24  * Master selection of compression modules.
25  * This is done once at the start of processing an image. We determine
26  * which modules will be used and give them appropriate initialization calls.
27  */
28 
29 GLOBAL(void)
31 {
32  /* Initialize master control (includes parameter checking/processing) */
33  jinit_c_master_control(cinfo, FALSE /* full compression */);
34 
35  /* Preprocessing */
36  if (! cinfo->raw_data_in) {
37  jinit_color_converter(cinfo);
38  jinit_downsampler(cinfo);
39  jinit_c_prep_controller(cinfo, FALSE /* never need full buffer here */);
40  }
41  /* Forward DCT */
42  jinit_forward_dct(cinfo);
43  /* Entropy encoding: either Huffman or arithmetic coding. */
44  if (cinfo->arith_code) {
45  ERREXIT(cinfo, JERR_ARITH_NOTIMPL);
46  } else {
47  if (cinfo->progressive_mode) {
48 #ifdef C_PROGRESSIVE_SUPPORTED
49  jinit_phuff_encoder(cinfo);
50 #else
51  ERREXIT(cinfo, JERR_NOT_COMPILED);
52 #endif
53  } else
54  jinit_huff_encoder(cinfo);
55  }
56 
57  /* Need a full-image coefficient buffer in any multi-pass mode. */
59  (boolean) (cinfo->num_scans > 1 || cinfo->optimize_coding));
60  jinit_c_main_controller(cinfo, FALSE /* never need full buffer here */);
61 
62  jinit_marker_writer(cinfo);
63 
64  /* We can now tell the memory manager to allocate virtual arrays. */
65  (*cinfo->mem->realize_virt_arrays) ((j_common_ptr) cinfo);
66 
67  /* Write the datastream header (SOI) immediately.
68  * Frame and scan headers are postponed till later.
69  * This lets application insert special markers after the SOI.
70  */
71  (*cinfo->marker->write_file_header) (cinfo);
72 }
jinit_c_main_controller(j_compress_ptr cinfo, boolean need_full_buffer)
Definition: jcmainct.c:245
#define FALSE
Definition: OPC_IceHook.h:9
#define ERREXIT(cinfo, code)
Definition: jerror.h:205
jinit_forward_dct(j_compress_ptr cinfo)
Definition: jcdctmgr.c:345
jinit_color_converter(j_compress_ptr cinfo)
Definition: jccolor.c:352
jinit_downsampler(j_compress_ptr cinfo)
Definition: jcsample.c:464
jinit_phuff_encoder(j_compress_ptr cinfo)
Definition: jcphuff.c:814
jinit_huff_encoder(j_compress_ptr cinfo)
Definition: jchuff.c:891
#define GLOBAL(type)
Definition: jmorecfg.h:188
jinit_marker_writer(j_compress_ptr cinfo)
Definition: jcmarker.c:645
jinit_c_master_control(j_compress_ptr cinfo, boolean transcode_only)
Definition: jcmaster.c:543
jinit_compress_master(j_compress_ptr cinfo)
Definition: jcinit.c:30
jinit_c_coef_controller(j_compress_ptr cinfo, boolean need_full_buffer)
Definition: jccoefct.c:405
jinit_c_prep_controller(j_compress_ptr cinfo, boolean need_full_buffer)
Definition: jcprepct.c:315


openhrp3
Author(s): AIST, General Robotix Inc., Nakamura Lab of Dept. of Mechano Informatics at University of Tokyo
autogenerated on Sat May 8 2021 02:42:38