Shoaib Ahmed / Mbed 2 deprecated uzairkhan

Final 350 project

Dependencies:   uzair Camera_LS_Y201 F7_Ethernet LCD_DISCO_F746NG NetworkAPI SDFileSystem mbed

includes/jcinit.c@0:791a779d6220, 2017-07-31 (annotated)

Committer:
shoaib_ahmed
Date:
Mon Jul 31 09:16:35 2017 +0000
Revision:
0:791a779d6220
final project;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
shoaib_ahmed 0:791a779d6220 1 /*
shoaib_ahmed 0:791a779d6220 2 * jcinit.c
shoaib_ahmed 0:791a779d6220 3 *
shoaib_ahmed 0:791a779d6220 4 * Copyright (C) 1991-1997, Thomas G. Lane.
shoaib_ahmed 0:791a779d6220 5 * Modified 2003-2013 by Guido Vollbeding.
shoaib_ahmed 0:791a779d6220 6 * This file is part of the Independent JPEG Group's software.
shoaib_ahmed 0:791a779d6220 7 * For conditions of distribution and use, see the accompanying README file.
shoaib_ahmed 0:791a779d6220 8 *
shoaib_ahmed 0:791a779d6220 9 * This file contains initialization logic for the JPEG compressor.
shoaib_ahmed 0:791a779d6220 10 * This routine is in charge of selecting the modules to be executed and
shoaib_ahmed 0:791a779d6220 11 * making an initialization call to each one.
shoaib_ahmed 0:791a779d6220 12 *
shoaib_ahmed 0:791a779d6220 13 * Logically, this code belongs in jcmaster.c. It's split out because
shoaib_ahmed 0:791a779d6220 14 * linking this routine implies linking the entire compression library.
shoaib_ahmed 0:791a779d6220 15 * For a transcoding-only application, we want to be able to use jcmaster.c
shoaib_ahmed 0:791a779d6220 16 * without linking in the whole library.
shoaib_ahmed 0:791a779d6220 17 */
shoaib_ahmed 0:791a779d6220 18
shoaib_ahmed 0:791a779d6220 19 #define JPEG_INTERNALS
shoaib_ahmed 0:791a779d6220 20 #include "jinclude.h"
shoaib_ahmed 0:791a779d6220 21 #include "jpeglib.h"
shoaib_ahmed 0:791a779d6220 22
shoaib_ahmed 0:791a779d6220 23
shoaib_ahmed 0:791a779d6220 24 /*
shoaib_ahmed 0:791a779d6220 25 * Master selection of compression modules.
shoaib_ahmed 0:791a779d6220 26 * This is done once at the start of processing an image. We determine
shoaib_ahmed 0:791a779d6220 27 * which modules will be used and give them appropriate initialization calls.
shoaib_ahmed 0:791a779d6220 28 */
shoaib_ahmed 0:791a779d6220 29
shoaib_ahmed 0:791a779d6220 30 GLOBAL(void)
shoaib_ahmed 0:791a779d6220 31 jinit_compress_master (j_compress_ptr cinfo)
shoaib_ahmed 0:791a779d6220 32 {
shoaib_ahmed 0:791a779d6220 33 long samplesperrow;
shoaib_ahmed 0:791a779d6220 34 JDIMENSION jd_samplesperrow;
shoaib_ahmed 0:791a779d6220 35
shoaib_ahmed 0:791a779d6220 36 /* For now, precision must match compiled-in value... */
shoaib_ahmed 0:791a779d6220 37 if (cinfo->data_precision != BITS_IN_JSAMPLE)
shoaib_ahmed 0:791a779d6220 38 ERREXIT1(cinfo, JERR_BAD_PRECISION, cinfo->data_precision);
shoaib_ahmed 0:791a779d6220 39
shoaib_ahmed 0:791a779d6220 40 /* Sanity check on image dimensions */
shoaib_ahmed 0:791a779d6220 41 if (cinfo->image_height <= 0 || cinfo->image_width <= 0 ||
shoaib_ahmed 0:791a779d6220 42 cinfo->input_components <= 0)
shoaib_ahmed 0:791a779d6220 43 ERREXIT(cinfo, JERR_EMPTY_IMAGE);
shoaib_ahmed 0:791a779d6220 44
shoaib_ahmed 0:791a779d6220 45 /* Width of an input scanline must be representable as JDIMENSION. */
shoaib_ahmed 0:791a779d6220 46 samplesperrow = (long) cinfo->image_width * (long) cinfo->input_components;
shoaib_ahmed 0:791a779d6220 47 jd_samplesperrow = (JDIMENSION) samplesperrow;
shoaib_ahmed 0:791a779d6220 48 if ((long) jd_samplesperrow != samplesperrow)
shoaib_ahmed 0:791a779d6220 49 ERREXIT(cinfo, JERR_WIDTH_OVERFLOW);
shoaib_ahmed 0:791a779d6220 50
shoaib_ahmed 0:791a779d6220 51 /* Initialize master control (includes parameter checking/processing) */
shoaib_ahmed 0:791a779d6220 52 jinit_c_master_control(cinfo, FALSE /* full compression */);
shoaib_ahmed 0:791a779d6220 53
shoaib_ahmed 0:791a779d6220 54 /* Preprocessing */
shoaib_ahmed 0:791a779d6220 55 if (! cinfo->raw_data_in) {
shoaib_ahmed 0:791a779d6220 56 jinit_color_converter(cinfo);
shoaib_ahmed 0:791a779d6220 57 jinit_downsampler(cinfo);
shoaib_ahmed 0:791a779d6220 58 jinit_c_prep_controller(cinfo, FALSE /* never need full buffer here */);
shoaib_ahmed 0:791a779d6220 59 }
shoaib_ahmed 0:791a779d6220 60 /* Forward DCT */
shoaib_ahmed 0:791a779d6220 61 jinit_forward_dct(cinfo);
shoaib_ahmed 0:791a779d6220 62 /* Entropy encoding: either Huffman or arithmetic coding. */
shoaib_ahmed 0:791a779d6220 63 if (cinfo->arith_code)
shoaib_ahmed 0:791a779d6220 64 jinit_arith_encoder(cinfo);
shoaib_ahmed 0:791a779d6220 65 else {
shoaib_ahmed 0:791a779d6220 66 jinit_huff_encoder(cinfo);
shoaib_ahmed 0:791a779d6220 67 }
shoaib_ahmed 0:791a779d6220 68
shoaib_ahmed 0:791a779d6220 69 /* Need a full-image coefficient buffer in any multi-pass mode. */
shoaib_ahmed 0:791a779d6220 70 jinit_c_coef_controller(cinfo,
shoaib_ahmed 0:791a779d6220 71 (boolean) (cinfo->num_scans > 1 || cinfo->optimize_coding));
shoaib_ahmed 0:791a779d6220 72 jinit_c_main_controller(cinfo, FALSE /* never need full buffer here */);
shoaib_ahmed 0:791a779d6220 73
shoaib_ahmed 0:791a779d6220 74 jinit_marker_writer(cinfo);
shoaib_ahmed 0:791a779d6220 75
shoaib_ahmed 0:791a779d6220 76 /* We can now tell the memory manager to allocate virtual arrays. */
shoaib_ahmed 0:791a779d6220 77 (*cinfo->mem->realize_virt_arrays) ((j_common_ptr) cinfo);
shoaib_ahmed 0:791a779d6220 78
shoaib_ahmed 0:791a779d6220 79 /* Write the datastream header (SOI) immediately.
shoaib_ahmed 0:791a779d6220 80 * Frame and scan headers are postponed till later.
shoaib_ahmed 0:791a779d6220 81 * This lets application insert special markers after the SOI.
shoaib_ahmed 0:791a779d6220 82 */
shoaib_ahmed 0:791a779d6220 83 (*cinfo->marker->write_file_header) (cinfo);
shoaib_ahmed 0:791a779d6220 84 }