LCOV - app.info - media/libjpeg/jcomapi.c

LCOV - code coverage report
| Current view: | directory - media/libjpeg - jcomapi.c (source / functions) |  | Found | Hit | Coverage |
| Test: | app.info | Lines: | 25 | 24 | 96.0 %
| Date: | 2012-07-07 | Functions: | 4 | 4 | 100.0 %

           1                 : /*
           2                 :  * jcomapi.c
           3                 :  *
           4                 :  * Copyright (C) 1994-1997, 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 application interface routines that are used for both
           9                 :  * compression and decompression.
          10                 :  */
          11                 :
          12                 : #define JPEG_INTERNALS
          13                 : #include "jinclude.h"
          14                 : #include "jpeglib.h"
          15                 :
          16                 :
          17                 : /*
          18                 :  * Abort processing of a JPEG compression or decompression operation,
          19                 :  * but don't destroy the object itself.
          20                 :  *
          21                 :  * For this, we merely clean up all the nonpermanent memory pools.
          22                 :  * Note that temp files (virtual arrays) are not allowed to belong to
          23                 :  * the permanent pool, so we will be able to close all temp files here.
          24                 :  * Closing a data source or destination, if necessary, is the application's
          25                 :  * responsibility.
          26                 :  */
          27                 :
          28                 : GLOBAL(void)
          29               8 : jpeg_abort (j_common_ptr cinfo)
          30                 : {
          31                 :   int pool;
          32                 :
          33                 :   /* Do nothing if called on a not-initialized or destroyed JPEG object. */
          34               8 :   if (cinfo->mem == NULL)
          35               0 :     return;
          36                 :
          37                 :   /* Releasing pools in reverse order might help avoid fragmentation
          38                 :    * with some (brain-damaged) malloc libraries.
          39                 :    */
          40              16 :   for (pool = JPOOL_NUMPOOLS-1; pool > JPOOL_PERMANENT; pool--) {
          41               8 :     (*cinfo->mem->free_pool) (cinfo, pool);
          42                 :   }
          43                 :
          44                 :   /* Reset overall state for possible reuse of object */
          45               8 :   if (cinfo->is_decompressor) {
          46               5 :     cinfo->global_state = DSTATE_START;
          47                 :     /* Try to keep application from accessing now-deleted marker list.
          48                 :      * A bit kludgy to do it here, but this is the most central place.
          49                 :      */
          50               5 :     ((j_decompress_ptr) cinfo)->marker_list = NULL;
          51                 :   } else {
          52               3 :     cinfo->global_state = CSTATE_START;
          53                 :   }
          54                 : }
          55                 :
          56                 :
          57                 : /*
          58                 :  * Destruction of a JPEG object.
          59                 :  *
          60                 :  * Everything gets deallocated except the master jpeg_compress_struct itself
          61                 :  * and the error manager struct.  Both of these are supplied by the application
          62                 :  * and must be freed, if necessary, by the application.  (Often they are on
          63                 :  * the stack and so don't need to be freed anyway.)
          64                 :  * Closing a data source or destination, if necessary, is the application's
          65                 :  * responsibility.
          66                 :  */
          67                 :
          68                 : GLOBAL(void)
          69               8 : jpeg_destroy (j_common_ptr cinfo)
          70                 : {
          71                 :   /* We need only tell the memory manager to release everything. */
          72                 :   /* NB: mem pointer is NULL if memory mgr failed to initialize. */
          73               8 :   if (cinfo->mem != NULL)
          74               8 :     (*cinfo->mem->self_destruct) (cinfo);
          75               8 :   cinfo->mem = NULL;         /* be safe if jpeg_destroy is called twice */
          76               8 :   cinfo->global_state = 0;   /* mark it destroyed */
          77               8 : }
          78                 :
          79                 :
          80                 : /*
          81                 :  * Convenience routines for allocating quantization and Huffman tables.
          82                 :  * (Would jutils.c be a more reasonable place to put these?)
          83                 :  */
          84                 :
          85                 : GLOBAL(JQUANT_TBL *)
          86              16 : jpeg_alloc_quant_table (j_common_ptr cinfo)
          87                 : {
          88                 :   JQUANT_TBL *tbl;
          89                 :
          90              16 :   tbl = (JQUANT_TBL *)
          91              16 :     (*cinfo->mem->alloc_small) (cinfo, JPOOL_PERMANENT, SIZEOF(JQUANT_TBL));
          92              16 :   tbl->sent_table = FALSE;   /* make sure this is false in any new table */
          93              16 :   return tbl;
          94                 : }
          95                 :
          96                 :
          97                 : GLOBAL(JHUFF_TBL *)
          98              32 : jpeg_alloc_huff_table (j_common_ptr cinfo)
          99                 : {
         100                 :   JHUFF_TBL *tbl;
         101                 :
         102              32 :   tbl = (JHUFF_TBL *)
         103              32 :     (*cinfo->mem->alloc_small) (cinfo, JPOOL_PERMANENT, SIZEOF(JHUFF_TBL));
         104              32 :   tbl->sent_table = FALSE;   /* make sure this is false in any new table */
         105              32 :   return tbl;
         106                 : }

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