Doxygen Source Code Documentation
jcinit.c File Reference
#include "jinclude.h"#include "jpeglib.h"Go to the source code of this file.
Defines | |
| #define | JPEG_INTERNALS |
Functions | |
| jinit_compress_master (j_compress_ptr cinfo) | |
Define Documentation
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Function Documentation
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Definition at line 30 of file jcinit.c. References jpeg_compress_struct::arith_code, ERREXIT, JERR_ARITH_NOTIMPL, jinit_c_coef_controller(), jinit_c_main_controller(), jinit_c_master_control(), jinit_c_prep_controller(), jinit_color_converter(), jinit_downsampler(), jinit_forward_dct(), jinit_huff_encoder(), jinit_marker_writer(), jinit_phuff_encoder(), jpeg_compress_struct::marker, jpeg_compress_struct::num_scans, jpeg_compress_struct::optimize_coding, jpeg_compress_struct::progressive_mode, and jpeg_compress_struct::raw_data_in. Referenced by jpeg_start_compress().
00031 {
00032 /* Initialize master control (includes parameter checking/processing) */
00033 jinit_c_master_control(cinfo, FALSE /* full compression */);
00034
00035 /* Preprocessing */
00036 if (! cinfo->raw_data_in) {
00037 jinit_color_converter(cinfo);
00038 jinit_downsampler(cinfo);
00039 jinit_c_prep_controller(cinfo, FALSE /* never need full buffer here */);
00040 }
00041 /* Forward DCT */
00042 jinit_forward_dct(cinfo);
00043 /* Entropy encoding: either Huffman or arithmetic coding. */
00044 if (cinfo->arith_code) {
00045 ERREXIT(cinfo, JERR_ARITH_NOTIMPL);
00046 } else {
00047 if (cinfo->progressive_mode) {
00048 #ifdef C_PROGRESSIVE_SUPPORTED
00049 jinit_phuff_encoder(cinfo);
00050 #else
00051 ERREXIT(cinfo, JERR_NOT_COMPILED);
00052 #endif
00053 } else
00054 jinit_huff_encoder(cinfo);
00055 }
00056
00057 /* Need a full-image coefficient buffer in any multi-pass mode. */
00058 jinit_c_coef_controller(cinfo,
00059 (boolean) (cinfo->num_scans > 1 || cinfo->optimize_coding));
00060 jinit_c_main_controller(cinfo, FALSE /* never need full buffer here */);
00061
00062 jinit_marker_writer(cinfo);
00063
00064 /* We can now tell the memory manager to allocate virtual arrays. */
00065 (*cinfo->mem->realize_virt_arrays) ((j_common_ptr) cinfo);
00066
00067 /* Write the datastream header (SOI) immediately.
00068 * Frame and scan headers are postponed till later.
00069 * This lets application insert special markers after the SOI.
00070 */
00071 (*cinfo->marker->write_file_header) (cinfo);
00072 }
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