LCOV - code coverage report
Current view: directory - media/libjpeg - jcinit.c (source / functions) Found Hit Coverage
Test: app.info Lines: 19 17 89.5 %
Date: 2012-06-02 Functions: 1 1 100.0 %

       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)
      30               3 : jinit_compress_master (j_compress_ptr cinfo)
      31                 : {
      32                 :   /* Initialize master control (includes parameter checking/processing) */
      33               3 :   jinit_c_master_control(cinfo, FALSE /* full compression */);
      34                 : 
      35                 :   /* Preprocessing */
      36               3 :   if (! cinfo->raw_data_in) {
      37               3 :     jinit_color_converter(cinfo);
      38               3 :     jinit_downsampler(cinfo);
      39               3 :     jinit_c_prep_controller(cinfo, FALSE /* never need full buffer here */);
      40                 :   }
      41                 :   /* Forward DCT */
      42               3 :   jinit_forward_dct(cinfo);
      43                 :   /* Entropy encoding: either Huffman or arithmetic coding. */
      44               3 :   if (cinfo->arith_code) {
      45                 : #ifdef C_ARITH_CODING_SUPPORTED
      46                 :     jinit_arith_encoder(cinfo);
      47                 : #else
      48               0 :     ERREXIT(cinfo, JERR_ARITH_NOTIMPL);
      49                 : #endif
      50                 :   } else {
      51               3 :     if (cinfo->progressive_mode) {
      52                 : #ifdef C_PROGRESSIVE_SUPPORTED
      53               0 :       jinit_phuff_encoder(cinfo);
      54                 : #else
      55                 :       ERREXIT(cinfo, JERR_NOT_COMPILED);
      56                 : #endif
      57                 :     } else
      58               3 :       jinit_huff_encoder(cinfo);
      59                 :   }
      60                 : 
      61                 :   /* Need a full-image coefficient buffer in any multi-pass mode. */
      62               6 :   jinit_c_coef_controller(cinfo,
      63               6 :                 (boolean) (cinfo->num_scans > 1 || cinfo->optimize_coding));
      64               3 :   jinit_c_main_controller(cinfo, FALSE /* never need full buffer here */);
      65                 : 
      66               3 :   jinit_marker_writer(cinfo);
      67                 : 
      68                 :   /* We can now tell the memory manager to allocate virtual arrays. */
      69               3 :   (*cinfo->mem->realize_virt_arrays) ((j_common_ptr) cinfo);
      70                 : 
      71                 :   /* Write the datastream header (SOI) immediately.
      72                 :    * Frame and scan headers are postponed till later.
      73                 :    * This lets application insert special markers after the SOI.
      74                 :    */
      75               3 :   (*cinfo->marker->write_file_header) (cinfo);
      76               3 : }

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